Ifinatamab deruxtecan

Ninth Breakthrough Therapy Designation for Daiichi Sankyo and AstraZeneca’s ENHERTU with the latest based on DESTINY-Breast09 phase 3 trial results Thirteenth Breakthrough Therapy Designation granted by FDA across the oncology portfolio of Daiichi Sankyo TOKYO & BASKING RIDGE, N.J.--(BUSINESS WIRE)--ENHERTU® (fam-trastuzumab deruxtecan-nxki) in combination with pertuzumab has been granted Breakthrough Therapy Designation (BTD) in the U.S. for the first-line treatment of adult patients with unresectable or metastatic HER2 positive breast cancer. ENHERTU is a specifically engineered HER2 directed DXd antibody drug conjugate (ADC) discovered by Daiichi Sankyo (TSE: 4568) and being jointly developed and commercialized by Daiichi Sankyo and AstraZeneca (LSE/STO/Nasdaq: AZN). The U.S. Food and Drug Administration (FDA) BTD is designed to accelerate the development and regulatory review of potential new medicines that are intended to treat a serious condition and address a significant unmet medical need. The medicine needs to have shown encouraging preliminary clinical results that demonstrate substantial improvement on a clinically significant endpoint over available medicines. The FDA granted this BTD based on data from the DESTINY-Breast09 phase 3 trial presented during a special late-breaking oral session at the 2025 American Society of Clinical Oncology (#ASCO25) Annual Meeting. “This Breakthrough Therapy Designation provides further recognition of the potential benefit of ENHERTU in combination with pertuzumab in the first-line setting of HER2 positive metastatic breast cancer,” said Ken Takeshita, MD, Global Head, R&D, Daiichi Sankyo. “If approved, ENHERTU will continue to redefine the treatment of metastatic breast cancer as these latest results from DESTINY-Breast09 demonstrate a median progression-free survival of more than three years when using ENHERTU plus pertuzumab in this disease setting, which is an improvement over the current standard of care that has been in place for more than a decade.” ENHERTU has received nine BTDs, including five BTDs for metastatic breast cancer. In addition to the new BTD, the four previous BTDs for breast cancer were for second-line HER2 positive metastatic breast cancer, later-line HER2 positive metastatic breast cancer, later-line HER2 low metastatic breast cancer and HER2 low or HER2 ultralow metastatic breast cancer. ENHERTU also received four additional BTDs for HER2 positive (IHC 3+) metastatic solid tumors, HER2 positive metastatic colorectal cancer, HER2 (ERBB2) mutant metastatic non-small cell lung cancer (NSCLC) and HER2 positive metastatic gastric cancer. The latest BTD for ENHERTU represents the thirteenth BTD across the oncology portfolio of Daiichi Sankyo. About DESTINY-Breast09 DESTINY-Breast09 is a global, multicenter, randomized, open-label, phase 3 trial evaluating the efficacy and safety of ENHERTU (5.4 mg/kg) either alone or in combination with pertuzumab versus standard of care THP (a taxane [docetaxel or paclitaxel], trastuzumab and pertuzumab) as a first-line treatment in patients with HER2 positive metastatic breast cancer. Patients were randomized 1:1:1 to receive either ENHERTU monotherapy with a pertuzumab matching placebo; ENHERTU in combination with pertuzumab; or THP. Randomization was stratified by prior treatment (de novo metastatic disease versus progression from early-stage disease), hormone receptor (HR) status and PIK3CA mutation status. The primary endpoint of DESTINY-Breast09 is progression-free survival (PFS) as assessed by blinded independent central review in both the ENHERTU monotherapy and ENHERTU combination arms. Secondary endpoints include investigator-assessed PFS, overall survival, objective response rate, duration of response, pharmacokinetics and safety. The investigational arm assessing ENHERTU monotherapy versus THP remains blinded to patients and investigators and will continue to the final PFS analysis. DESTINY-Breast09 enrolled 1,157 patients across multiple sites in Africa, Asia, Europe, North America and South America. For more information about the trial, visit ClinicalTrials.gov. About HER2 Positive Metastatic Breast Cancer Breast cancer is the second most common cancer and one of the leading causes of cancer-related deaths worldwide.1 More than two million breast cancer cases were diagnosed in 2022, with more than 665,000 deaths globally.1 While survival rates are high for those diagnosed with early breast cancer, only about 30% of patients diagnosed with or progress to metastatic disease are expected to live five years following diagnosis.2 HER2 is a tyrosine kinase receptor growth-promoting protein expressed on the surface of many types of tumors including breast cancer.3 HER2 protein overexpression may occur as a result of HER2 gene amplification.4 Approximately one in five cases of breast cancer are considered HER2 positive.5 HER2 positive metastatic breast cancer is an aggressive disease driven by overexpression or amplification of HER2 that affects 15% to 20% of patients with metastatic breast cancer.6 While HER2 targeted therapies have improved outcomes, prognosis remains poor with most patients experiencing disease progression within two years of first-line treatment with THP, which has been the standard of care for more than a decade.4,7,8,9 Further, approximately one in three patients do not receive any treatment following first-line therapy due to disease progression or death.10,11 About ENHERTU ENHERTU (trastuzumab deruxtecan; fam-trastuzumab deruxtecan-nxki in the U.S. only) is a HER2 directed ADC. Designed using Daiichi Sankyo’s proprietary DXd ADC Technology, ENHERTU is the lead ADC in the oncology portfolio of Daiichi Sankyo and the most advanced program in AstraZeneca’s ADC scientific platform. ENHERTU consists of a HER2 monoclonal antibody attached to a number of topoisomerase I inhibitor payloads (an exatecan derivative, DXd) via tetrapeptide-based cleavable linkers. ENHERTU (5.4 mg/kg) is approved in more than 85 countries worldwide for the treatment of adult patients with unresectable or metastatic HER2 positive (immunohistochemistry [IHC] 3+ or in-situ hybridization (ISH)+) breast cancer who have received a prior anti-HER2-based regimen, either in the metastatic setting or in the neoadjuvant or adjuvant setting, and have developed disease recurrence during or within six months of completing therapy based on the results from the DESTINY-Breast03 trial. ENHERTU (5.4 mg/kg) is approved in more than 85 countries worldwide for the treatment of adult patients with unresectable or metastatic HER2 low (IHC 1+ or IHC 2+/ISH-) breast cancer who have received a prior systemic therapy in the metastatic setting or developed disease recurrence during or within six months of completing adjuvant chemotherapy based on the results from the DESTINY-Breast04 trial. ENHERTU (5.4 mg/kg) is approved in more than 40 countries for the treatment of adult patients with unresectable or metastatic hormone receptor (HR) positive, HER2 low (IHC 1+ or IHC 2+/ISH-) or HER2 ultralow (IHC 0 with membrane staining) breast cancer, as determined by a locally or regionally approved test, that have progressed on one or more endocrine therapies in the metastatic setting based on the results from the DESTINY-Breast06 trial. ENHERTU (5.4 mg/kg) is approved in more than 60 countries worldwide for the treatment of adult patients with unresectable or metastatic NSCLC whose tumors have activating HER2 (ERBB2) mutations, as detected by a locally or regionally approved test, and who have received a prior systemic therapy based on the results from the DESTINY-Lung02 and/or DESTINY-Lung05 trials. Continued approval in China and the U.S. for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial. ENHERTU (6.4 mg/kg) is approved in more than 70 countries worldwide for the treatment of adult patients with locally advanced or metastatic HER2 positive (IHC 3+ or IHC 2+/ISH+) gastric or gastroesophageal junction (GEJ) adenocarcinoma who have received a prior trastuzumab-based regimen based on the results from the DESTINY-Gastric01, DESTINY-Gastric02 and/or DESTINY-Gastric06 trials. Continued approval in China for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial. ENHERTU (5.4 mg/kg) is approved in more than 10 countries worldwide for the treatment of adult patients with unresectable or metastatic HER2 positive (IHC 3+) solid tumors who have received prior systemic treatment and have no satisfactory alternative treatment options based on efficacy results from the DESTINY-PanTumor02, DESTINY-Lung01 and DESTINY-CRC02 trials. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial. About the ENHERTU Clinical Development Program A comprehensive global clinical development program is underway evaluating the efficacy and safety of ENHERTU as a monotherapy or in combination or sequentially with other anti-cancer therapies across multiple HER2 targetable cancers. About the Daiichi Sankyo and AstraZeneca Collaboration Daiichi Sankyo and AstraZeneca entered into a global collaboration to jointly develop and commercialize ENHERTU in March 2019 and DATROWAY® in July 2020, except in Japan where Daiichi Sankyo maintains exclusive rights for each ADC. Daiichi Sankyo is responsible for the manufacturing and supply of ENHERTU and DATROWAY. About the ADC Portfolio of Daiichi Sankyo The Daiichi Sankyo ADC portfolio consists of seven ADCs in clinical development crafted from two distinct ADC technology platforms discovered in-house by Daiichi Sankyo. The ADC platform furthest in clinical development is Daiichi Sankyo’s DXd ADC Technology where each ADC consists of a monoclonal antibody attached to a number of topoisomerase I inhibitor payloads (an exatecan derivative, DXd) via tetrapeptide-based cleavable linkers. The DXd ADC portfolio currently consists of ENHERTU, a HER2 directed ADC, and DATROWAY, a TROP2 directed ADC, which are being jointly developed and commercialized globally with AstraZeneca. Patritumab deruxtecan (HER3-DXd), a HER3 directed ADC, ifinatamab deruxtecan (I-DXd), a B7-H3 directed ADC, and raludotatug deruxtecan (R-DXd), a CDH6 directed ADC, are being jointly developed and commercialized globally with Merck & Co., Inc, Rahway, NJ, USA. DS-3939, a TA-MUC1 directed ADC, is being developed by Daiichi Sankyo. The second Daiichi Sankyo ADC platform consists of a monoclonal antibody attached to a modified pyrrolobenzodiazepine (PBD) payload. DS-9606, a CLDN6 directed PBD ADC, is the first of several planned ADCs in clinical development utilizing this platform. Ifinatamab deruxtecan, patritumab deruxtecan, raludotatug deruxtecan, DS-3939 and DS-9606 are investigational medicines that have not been approved for any indication in any country. Safety and efficacy have not been established. ENHERTU U.S. Important Safety Information Indications ENHERTU is a HER2-directed antibody and topoisomerase inhibitor conjugate indicated for the treatment of adult patients with: Unresectable or metastatic HER2-positive (IHC 3+ or ISH positive) breast cancer who have received a prior anti-HER2-based regimen either: In the metastatic setting, or In the neoadjuvant or adjuvant setting and have developed disease recurrence during or within six months of completing therapy In the metastatic setting, or In the neoadjuvant or adjuvant setting and have developed disease recurrence during or within six months of completing therapy Unresectable or metastatic: Hormone receptor (HR)-positive, HER2-low (IHC 1+ or IHC 2+/ISH-) or HER2-ultralow (IHC 0 with membrane staining) breast cancer, as determined by an FDA-approved test, that has progressed on one or more endocrine therapies in the metastatic setting HER2-low (IHC 1+ or IHC 2+/ISH-) breast cancer, as determined by an FDA-approved test, who have received a prior chemotherapy in the metastatic setting or developed disease recurrence during or within 6 months of completing adjuvant chemotherapy Hormone receptor (HR)-positive, HER2-low (IHC 1+ or IHC 2+/ISH-) or HER2-ultralow (IHC 0 with membrane staining) breast cancer, as determined by an FDA-approved test, that has progressed on one or more endocrine therapies in the metastatic setting HER2-low (IHC 1+ or IHC 2+/ISH-) breast cancer, as determined by an FDA-approved test, who have received a prior chemotherapy in the metastatic setting or developed disease recurrence during or within 6 months of completing adjuvant chemotherapy Unresectable or metastatic non-small cell lung cancer (NSCLC) whose tumors have activating HER2 (ERBB2) mutations, as detected by an FDA-approved test, and who have received a prior systemic therapy This indication is approved under accelerated approval based on objective response rate and duration of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial. Locally advanced or metastatic HER2-positive (IHC 3+ or IHC 2+/ISH positive) gastric or gastroesophageal junction (GEJ) adenocarcinoma who have received a prior trastuzumab-based regimen Unresectable or metastatic HER2-positive (IHC 3+) solid tumors who have received prior systemic treatment and have no satisfactory alternative treatment options This indication is approved under accelerated approval based on objective response rate and duration of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial. WARNING: INTERSTITIAL LUNG DISEASE and EMBRYO-FETAL TOXICITY Contraindications None. Warnings and Precautions Interstitial Lung Disease / Pneumonitis Severe, life-threatening, or fatal interstitial lung disease (ILD), including pneumonitis, can occur in patients treated with ENHERTU. A higher incidence of Grade 1 and 2 ILD/pneumonitis has been observed in patients with moderate renal impairment. Advise patients to immediately report cough, dyspnea, fever, and/or any new or worsening respiratory symptoms. Monitor patients for signs and symptoms of ILD. Promptly investigate evidence of ILD. Evaluate patients with suspected ILD by radiographic imaging. Consider consultation with a pulmonologist. For asymptomatic ILD/pneumonitis (Grade 1), interrupt ENHERTU until resolved to Grade 0, then if resolved in ≤28 days from date of onset, maintain dose. If resolved in >28 days from date of onset, reduce dose 1 level. Consider corticosteroid treatment as soon as ILD/pneumonitis is suspected (e.g., ≥0.5 mg/kg/day prednisolone or equivalent). For symptomatic ILD/pneumonitis (Grade 2 or greater), permanently discontinue ENHERTU. Promptly initiate systemic corticosteroid treatment as soon as ILD/pneumonitis is suspected (e.g., ≥1 mg/kg/day prednisolone or equivalent) and continue for at least 14 days followed by gradual taper for at least 4 weeks. HER2-Positive, HER2-Low, and HER2-Ultralow Metastatic Breast Cancer, HER2-Mutant NSCLC, and Solid Tumors (Including IHC 3+) (5.4 mg/kg) In patients with metastatic breast cancer, HER2-mutant NSCLC, and other solid tumors treated with ENHERTU 5.4 mg/kg, ILD occurred in 12% of patients. Median time to first onset was 5.5 months (range: 0.9 to 31.5). Fatal outcomes due to ILD and/or pneumonitis occurred in 0.9% of patients treated with ENHERTU. HER2-Positive Locally Advanced or Metastatic Gastric Cancer (6.4 mg/kg) In patients with locally advanced or metastatic HER2-positive gastric or GEJ adenocarcinoma treated with ENHERTU 6.4 mg/kg, ILD occurred in 10% of patients. Median time to first onset was 2.8 months (range: 1.2 to 21). Neutropenia Severe neutropenia, including febrile neutropenia, can occur in patients treated with ENHERTU. Monitor complete blood counts prior to initiation of ENHERTU and prior to each dose, and as clinically indicated. For Grade 3 neutropenia (Absolute Neutrophil Count [ANC] <1.0 to 0.5 x 109/L), interrupt ENHERTU until resolved to Grade 2 or less, then maintain dose. For Grade 4 neutropenia (ANC <0.5 x 109/L), interrupt ENHERTU until resolved to Grade 2 or less, then reduce dose by 1 level. For febrile neutropenia (ANC <1.0 x 109/L and temperature >38.3º C or a sustained temperature of ≥38º C for more than 1 hour), interrupt ENHERTU until resolved, then reduce dose by 1 level. HER2-Positive, HER2-Low, and HER2-Ultralow Metastatic Breast Cancer, HER2-Mutant NSCLC, and Solid Tumors (Including IHC 3+) (5.4 mg/kg) In patients with metastatic breast cancer, HER2-mutant NSCLC, and other solid tumors treated with ENHERTU 5.4 mg/kg, a decrease in neutrophil count was reported in 65% of patients. Nineteen percent had Grade 3 or 4 decreased neutrophil count. Median time to first onset of decreased neutrophil count was 22 days (range: 2 to 939). Febrile neutropenia was reported in 1.2% of patients. HER2-Positive Locally Advanced or Metastatic Gastric Cancer (6.4 mg/kg) In patients with locally advanced or metastatic HER2-positive gastric or GEJ adenocarcinoma treated with ENHERTU 6.4 mg/kg, a decrease in neutrophil count was reported in 72% of patients. Fifty-one percent had Grade 3 or 4 decreased neutrophil count. Median time to first onset of decreased neutrophil count was 16 days (range: 4 to 187). Febrile neutropenia was reported in 4.8% of patients. Left Ventricular Dysfunction Patients treated with ENHERTU may be at increased risk of developing left ventricular dysfunction. Left ventricular ejection fraction (LVEF) decrease has been observed with anti-HER2 therapies, including ENHERTU. Assess LVEF prior to initiation of ENHERTU and at regular intervals during treatment as clinically indicated. Manage LVEF decrease through treatment interruption. When LVEF is >45% and absolute decrease from baseline is 10-20%, continue treatment with ENHERTU. When LVEF is 40-45% and absolute decrease from baseline is 20%, interrupt ENHERTU and repeat LVEF assessment within 3 weeks. If LVEF of 20% is confirmed, permanently discontinue ENHERTU. Permanently discontinue ENHERTU in patients with symptomatic congestive heart failure. Treatment with ENHERTU has not been studied in patients with a history of clinically significant cardiac disease or LVEF <50% prior to initiation of treatment. HER2-Positive, HER2-Low, and HER2-Ultralow Metastatic Breast Cancer, HER2-Mutant NSCLC, and Solid Tumors (Including IHC 3+) (5.4 mg/kg) In patients with metastatic breast cancer, HER2-mutant NSCLC, and other solid tumors treated with ENHERTU 5.4 mg/kg, LVEF decrease was reported in 4.6% of patients, of which 0.6% were Grade 3 or 4. HER2-Positive Locally Advanced or Metastatic Gastric Cancer (6.4 mg/kg) In patients with locally advanced or metastatic HER2-positive gastric or GEJ adenocarcinoma treated with ENHERTU 6.4 mg/kg, no clinical adverse events of heart failure were reported; however, on echocardiography, 8% were found to have asymptomatic Grade 2 decrease in LVEF. Embryo-Fetal Toxicity ENHERTU can cause fetal harm when administered to a pregnant woman. Advise patients of the potential risks to a fetus. Verify the pregnancy status of females of reproductive potential prior to the initiation of ENHERTU. Advise females of reproductive potential to use effective contraception during treatment and for 7 months after the last dose of ENHERTU. Advise male patients with female partners of reproductive potential to use effective contraception during treatment with ENHERTU and for 4 months after the last dose of ENHERTU. Additional Dose Modifications Thrombocytopenia For Grade 3 thrombocytopenia (platelets <50 to 25 x 109/L) interrupt ENHERTU until resolved to Grade 1 or less, then maintain dose. For Grade 4 thrombocytopenia (platelets <25 x 109/L) interrupt ENHERTU until resolved to Grade 1 or less, then reduce dose by 1 level. Adverse Reactions HER2-Positive, HER2-Low, and HER2-Ultralow Metastatic Breast Cancer, HER2-Mutant NSCLC, and Solid Tumors (Including IHC 3+) (5.4 mg/kg) The pooled safety population reflects exposure to ENHERTU 5.4 mg/kg intravenously every 3 weeks in 2233 patients in Study DS8201-A-J101 (NCT02564900), DESTINY-Breast01, DESTINY-Breast02, DESTINYBreast03, DESTINY-Breast04, DESTINY-Breast06, DESTINY-Lung01, DESTINY-Lung02, DESTINY-CRC02, and DESTINY-PanTumor02. Among these patients, 67% were exposed for >6 months and 38% were exposed for >1 year. In this pooled safety population, the most common (≥20%) adverse reactions, including laboratory abnormalities, were decreased white blood cell count (73%), nausea (72%), decreased hemoglobin (67%), decreased neutrophil count (65%), decreased lymphocyte count (60%), fatigue (55%), decreased platelet count (48%), increased aspartate aminotransferase (46%), increased alanine aminotransferase (44%), increased blood alkaline phosphatase (39%), vomiting (38%), alopecia (37%), constipation (32%), decreased blood potassium (32%), decreased appetite (31%), diarrhea (30%), and musculoskeletal pain (24%). HER2-Positive Metastatic Breast Cancer DESTINY-Breast03 The safety of ENHERTU was evaluated in 257 patients with unresectable or metastatic HER2-positive breast cancer who received at least 1 dose of ENHERTU 5.4 mg/kg intravenously once every 3 weeks in DESTINY-Breast03. The median duration of treatment was 14 months (range: 0.7 to 30) for patients who received ENHERTU. Serious adverse reactions occurred in 19% of patients receiving ENHERTU. Serious adverse reactions in >1% of patients who received ENHERTU were vomiting, ILD, pneumonia, pyrexia, and urinary tract infection. Fatalities due to adverse reactions occurred in 0.8% of patients including COVID-19 and sudden death (1 patient each). ENHERTU was permanently discontinued in 14% of patients, of which ILD/pneumonitis accounted for 8%. Dose interruptions due to adverse reactions occurred in 44% of patients treated with ENHERTU. The most frequent adverse reactions (>2%) associated with dose interruption were neutropenia, leukopenia, anemia, thrombocytopenia, pneumonia, nausea, fatigue, and ILD/pneumonitis. Dose reductions occurred in 21% of patients treated with ENHERTU. The most frequent adverse reactions (>2%) associated with dose reduction were nausea, neutropenia, and fatigue. The most common (≥20%) adverse reactions, including laboratory abnormalities, were nausea (76%), decreased white blood cell count (74%), decreased neutrophil count (70%), increased aspartate aminotransferase (67%), decreased hemoglobin (64%), decreased lymphocyte count (55%), increased alanine aminotransferase (53%), decreased platelet count (52%), fatigue (49%), vomiting (49%), increased blood alkaline phosphatase (49%), alopecia (37%), decreased blood potassium (35%), constipation (34%), musculoskeletal pain (31%), diarrhea (29%), decreased appetite (29%), headache (22%), respiratory infection (22%), abdominal pain (21%), increased blood bilirubin (20%), and stomatitis (20%). HER2-Low and HER2-Ultralow Metastatic Breast Cancer DESTINY-Breast06 The safety of ENHERTU was evaluated in 434 patients with unresectable or metastatic HER2-low (IHC 1+ or IHC 2+/ISH-) or HER2-ultralow (IHC 0 with membrane staining) breast cancer who received ENHERTU 5.4 mg/kg intravenously once every 3 weeks in DESTINY-Breast06. The median duration of treatment was 11 months (range: 0.4 to 39.6) for patients who received ENHERTU. Serious adverse reactions occurred in 20% of patients receiving ENHERTU. Serious adverse reactions in >1% of patients who received ENHERTU were ILD/pneumonitis, COVID-19, febrile neutropenia, and hypokalemia. Fatalities due to adverse reactions occurred in 2.8% of patients including ILD (0.7%); sepsis (0.5%); and COVID-19 pneumonia, bacterial meningoencephalitis, neutropenic sepsis, peritonitis, cerebrovascular accident, general physical health deterioration (0.2% each). ENHERTU was permanently discontinued in 14% of patients. The most frequent adverse reaction (>2%) associated with permanent discontinuation was ILD/pneumonitis. Dose interruptions due to adverse reactions occurred in 48% of patients treated with ENHERTU. The most frequent adverse reactions (>2%) associated with dose interruption were COVID-19, decreased neutrophil count, anemia, pyrexia, pneumonia, decreased white blood cell count, and ILD. Dose reductions occurred in 25% of patients treated with ENHERTU. The most frequent adverse reactions (>2%) associated with dose reduction were nausea, fatigue, decreased platelet count, and decreased neutrophil count. The most common (≥20%) adverse reactions, including laboratory abnormalities, were decreased white blood cell count (86%), decreased neutrophil count (75%), nausea (70%), decreased hemoglobin (69%), decreased lymphocyte count (66%), fatigue (53%), decreased platelet count (48%), alopecia (48%), increased alanine aminotransferase (44%), increased blood alkaline phosphatase (43%), increased aspartate aminotransferase (41%), decreased blood potassium (35%), diarrhea (34%), vomiting (34%), constipation (32%), decreased appetite (26%), COVID-19 (26%), and musculoskeletal pain (24%). DESTINY-Breast04 The safety of ENHERTU was evaluated in 371 patients with unresectable or metastatic HER2-low (IHC 1+ or IHC 2+/ISH-) breast cancer who received ENHERTU 5.4 mg/kg intravenously once every 3 weeks in DESTINY-Breast04. The median duration of treatment was 8 months (range: 0.2 to 33) for patients who received ENHERTU. Serious adverse reactions occurred in 28% of patients receiving ENHERTU. Serious adverse reactions in >1% of patients who received ENHERTU were ILD/pneumonitis, pneumonia, dyspnea, musculoskeletal pain, sepsis, anemia, febrile neutropenia, hypercalcemia, nausea, pyrexia, and vomiting. Fatalities due to adverse reactions occurred in 4% of patients including ILD/pneumonitis (3 patients); sepsis (2 patients); and ischemic colitis, disseminated intravascular coagulation, dyspnea, febrile neutropenia, general physical health deterioration, pleural effusion, and respiratory failure (1 patient each). ENHERTU was permanently discontinued in 16% of patients, of which ILD/pneumonitis accounted for 8%. Dose interruptions due to adverse reactions occurred in 39% of patients treated with ENHERTU. The most frequent adverse reactions (>2%) associated with dose interruption were neutropenia, fatigue, anemia, leukopenia, COVID-19, ILD/pneumonitis, increased transaminases, and hyperbilirubinemia. Dose reductions occurred in 23% of patients treated with ENHERTU. The most frequent adverse reactions (>2%) associated with dose reduction were fatigue, nausea, thrombocytopenia, and neutropenia. The most common (≥20%) adverse reactions, including laboratory abnormalities, were nausea (76%), decreased white blood cell count (70%), decreased hemoglobin (64%), decreased neutrophil count (64%), decreased lymphocyte count (55%), fatigue (54%), decreased platelet count (44%), alopecia (40%), vomiting (40%), increased aspartate aminotransferase (38%), increased alanine aminotransferase (36%), constipation (34%), increased blood alkaline phosphatase (34%), decreased appetite (32%), musculoskeletal pain (32%), diarrhea (27%), and decreased blood potassium (25%). HER2-Mutant Unresectable or Metastatic NSCLC (5.4 mg/kg) DESTINY-Lung02 evaluated 2 dose levels (5.4 mg/kg [n=101] and 6.4 mg/kg [n=50]); however, only the results for the recommended dose of 5.4 mg/kg intravenously every 3 weeks are described below due to increased toxicity observed with the higher dose in patients with NSCLC, including ILD/pneumonitis. The safety of ENHERTU was evaluated in 101 patients with HER2-mutant unresectable or metastatic NSCLC who received ENHERTU 5.4 mg/kg intravenously once every 3 weeks until disease progression or unacceptable toxicity in DESTINY-Lung02. Nineteen percent of patients were exposed for >6 months. Serious adverse reactions occurred in 30% of patients receiving ENHERTU. Serious adverse reactions in >1% of patients who received ENHERTU were ILD/pneumonitis, thrombocytopenia, dyspnea, nausea, pleural effusion, and increased troponin I. Fatality occurred in 1 patient with suspected ILD/pneumonitis (1%). ENHERTU was permanently discontinued in 8% of patients. Adverse reactions which resulted in permanent discontinuation of ENHERTU were ILD/pneumonitis, diarrhea, decreased blood potassium, hypomagnesemia, myocarditis, and vomiting. Dose interruptions of ENHERTU due to adverse reactions occurred in 23% of patients. Adverse reactions which required dose interruption (>2%) included neutropenia and ILD/pneumonitis. Dose reductions due to an adverse reaction occurred in 11% of patients. The most common (≥20%) adverse reactions, including laboratory abnormalities, were nausea (61%), decreased white blood cell count (60%), decreased hemoglobin (58%), decreased neutrophil count (52%), decreased lymphocyte count (43%), decreased platelet count (40%), decreased albumin (39%), increased aspartate aminotransferase (35%), increased alanine aminotransferase (34%), fatigue (32%), constipation (31%), decreased appetite (30%), vomiting (26%), increased alkaline phosphatase (22%), and alopecia (21%). HER2-Positive Locally Advanced or Metastatic Gastric Cancer (6.4 mg/kg) The safety of ENHERTU was evaluated in 187 patients with locally advanced or metastatic HER2-positive gastric or GEJ adenocarcinoma in DESTINY-Gastric01. Patients intravenously received at least 1 dose of either ENHERTU (N=125) 6.4 mg/kg every 3 weeks or either irinotecan (N=55) 150 mg/m2 biweekly or paclitaxel (N=7) 80 mg/m2 weekly for 3 weeks. The median duration of treatment was 4.6 months (range: 0.7 to 22.3) for patients who received ENHERTU. Serious adverse reactions occurred in 44% of patients receiving ENHERTU 6.4 mg/kg. Serious adverse reactions in >2% of patients who received ENHERTU were decreased appetite, ILD, anemia, dehydration, pneumonia, cholestatic jaundice, pyrexia, and tumor hemorrhage. Fatalities due to adverse reactions occurred in 2.4% of patients: disseminated intravascular coagulation, large intestine perforation, and pneumonia occurred in 1 patient each (0.8%). ENHERTU was permanently discontinued in 15% of patients, of which ILD accounted for 6%. Dose interruptions due to adverse reactions occurred in 62% of patients treated with ENHERTU. The most frequent adverse reactions (>2%) associated with dose interruption were neutropenia, anemia, decreased appetite, leukopenia, fatigue, thrombocytopenia, ILD, pneumonia, lymphopenia, upper respiratory tract infection, diarrhea, and decreased blood potassium. Dose reductions occurred in 32% of patients treated with ENHERTU. The most frequent adverse reactions (>2%) associated with dose reduction were neutropenia, decreased appetite, fatigue, nausea, and febrile neutropenia. The most common (≥20%) adverse reactions, including laboratory abnormalities, were decreased hemoglobin (75%), decreased white blood cell count (74%), decreased neutrophil count (72%), decreased lymphocyte count (70%), decreased platelet count (68%), nausea (63%), decreased appetite (60%), increased aspartate aminotransferase (58%), fatigue (55%), increased blood alkaline phosphatase (54%), increased alanine aminotransferase (47%), diarrhea (32%), decreased blood potassium (30%), vomiting (26%), constipation (24%), increased blood bilirubin (24%), pyrexia (24%), and alopecia (22%). HER2-Positive (IHC 3+) Unresectable or Metastatic Solid Tumors The safety of ENHERTU was evaluated in 347 adult patients with unresectable or metastatic HER2-positive (IHC 3+) solid tumors who received ENHERTU 5.4 mg/kg intravenously once every 3 weeks in DESTINY-Breast01, DESTINY-PanTumor02, DESTINY-Lung01, and DESTINY-CRC02. The median duration of treatment was 8.3 months (range 0.7 to 30.2). Serious adverse reactions occurred in 34% of patients receiving ENHERTU. Serious adverse reactions in >1% of patients who received ENHERTU were sepsis, pneumonia, vomiting, urinary tract infection, abdominal pain, nausea, pneumonitis, pleural effusion, hemorrhage, COVID-19, fatigue, acute kidney injury, anemia, cellulitis, and dyspnea. Fatalities due to adverse reactions occurred in 6.3% of patients including ILD/pneumonitis (2.3%), cardiac arrest (0.6%), COVID-19 (0.6%), and sepsis (0.6%). The following events occurred in 1 patient each (0.3%): acute kidney injury, cerebrovascular accident, general physical health deterioration, pneumonia, and hemorrhagic shock. ENHERTU was permanently discontinued in 15% of patients, of which ILD/pneumonitis accounted for 10%. Dose interruptions due to adverse reactions occurred in 48% of patients. The most frequent adverse reactions (>2%) associated with dose interruption were decreased neutrophil count, anemia, COVID-19, fatigue, decreased white blood cell count, and ILD/pneumonitis. Dose reductions occurred in 27% of patients treated with ENHERTU. The most frequent adverse reactions (>2%) associated with dose reduction were fatigue, nausea, decreased neutrophil count, ILD/pneumonitis, and diarrhea. The most common (≥20%) adverse reactions, including laboratory abnormalities, were decreased white blood cell count (75%), nausea (69%), decreased hemoglobin (67%), decreased neutrophil count (66%), fatigue (59%), decreased lymphocyte count (58%), decreased platelet count (51%), increased aspartate aminotransferase (45%), increased alanine aminotransferase (44%), increased blood alkaline phosphatase (36%), vomiting (35%), decreased appetite (34%), alopecia (34%), diarrhea (31%), decreased blood potassium (29%), constipation (28%), decreased sodium (22%), stomatitis (20%), and upper respiratory tract infection (20%). Use in Specific Populations Pregnancy: ENHERTU can cause fetal harm when administered to a pregnant woman. Advise patients of the potential risks to a fetus. There are clinical considerations if ENHERTU is used in pregnant women, or if a patient becomes pregnant within 7 months after the last dose of ENHERTU. Lactation: There are no data regarding the presence of ENHERTU in human milk, the effects on the breastfed child, or the effects on milk production. Because of the potential for serious adverse reactions in a breastfed child, advise women not to breastfeed during treatment with ENHERTU and for 7 months after the last dose. Females and Males of Reproductive Potential: Pregnancy testing : Verify pregnancy status of females of reproductive potential prior to initiation of ENHERTU. Contraception : Females : ENHERTU can cause fetal harm when administered to a pregnant woman. Advise females of reproductive potential to use effective contraception during treatment with ENHERTU and for 7 months after the last dose. Males : Advise male patients with female partners of reproductive potential to use effective contraception during treatment with ENHERTU and for 4 months after the last dose. Infertility : ENHERTU may impair male reproductive function and fertility. Pediatric Use: Safety and effectiveness of ENHERTU have not been established in pediatric patients. Geriatric Use: Of the 1741 patients with HER2-positive, HER2-low, or HER2-ultralow breast cancer treated with ENHERTU 5.4 mg/kg, 24% were ≥65 years and 4.9% were ≥75 years. No overall differences in efficacy within clinical studies were observed between patients ≥65 years of age compared to younger patients. There was a higher incidence of Grade 3-4 adverse reactions observed in patients aged ≥65 years (61%) as compared to younger patients (52%). Of the 101 patients with HER2-mutant unresectable or metastatic NSCLC treated with ENHERTU 5.4 mg/kg, 40% were ≥65 years and 8% were ≥75 years. No overall differences in efficacy or safety were observed between patients ≥65 years of age compared to younger patients. Of the 125 patients with HER2-positive locally advanced or metastatic gastric or GEJ adenocarcinoma treated with ENHERTU 6.4 mg/kg in DESTINY-Gastric01, 56% were ≥65 years and 14% were ≥75 years. No overall differences in efficacy or safety were observed between patients ≥65 years of age compared to younger patients. Of the 192 patients with HER2-positive (IHC 3+) unresectable or metastatic solid tumors treated with ENHERTU 5.4 mg/kg in DESTINY-PanTumor02, DESTINY-Lung01, or DESTINY-CRC02, 39% were ≥65 years and 9% were ≥75 years. No overall differences in efficacy or safety were observed between patients ≥65 years of age compared to younger patients. Renal Impairment: A higher incidence of Grade 1 and 2 ILD/pneumonitis has been observed in patients with moderate renal impairment. Monitor patients with moderate renal impairment more frequently. The recommended dosage of ENHERTU has not been established for patients with severe renal impairment (CLcr <30 mL/min). Hepatic Impairment: In patients with moderate hepatic impairment, due to potentially increased exposure, closely monitor for increased toxicities related to the topoisomerase inhibitor, DXd. The recommended dosage of ENHERTU has not been established for patients with severe hepatic impairment (total bilirubin >3 times ULN and any AST). To report SUSPECTED ADVERSE REACTIONS, contact Daiichi Sankyo, Inc. at 1-877-437-7763 or FDA at 1-800-FDA-1088 or fda.gov/medwatch. Please see accompanying full Prescribing Information, including Boxed WARNINGS, and Medication Guide. About Daiichi Sankyo Daiichi Sankyo is an innovative global healthcare company contributing to the sustainable development of society that discovers, develops and delivers new standards of care to enrich the quality of life around the world. With more than 120 years of experience, Daiichi Sankyo leverages its world-class science and technology to create new modalities and innovative medicines for people with cancer, cardiovascular and other diseases with high unmet medical need. For more information, please visit www.daiichisankyo.com. ____________________ References 1 Bray F, et al. CA Cancer J Clin. 2024;10.3322/caac.21834. 2 National Cancer Institute. SEER Cancer Stat Facts: Female Breast Cancer Subtypes. Accessed July 2025. 3 Iqbal N, et al. Mol Biol Int. 2014;852748. 4 Pillai R, et al. Cancer. 2017;1;123(21):4099-4105. 5 Ahn S, et al. J Pathol Transl Med. 2019;54(1):34–44. 6 Tarantino P, et al. J An Onc. 2023;34(8):645-659. 7 Swain SM, et al. Lancet Oncol. 2020;21(4):519-530. 8 Blumenthal G, et al. Clinical Cancer Research. 2013;19(18). 9 Tripathy D, et al. The Oncologist. 2020;25(2):e214-e222. 10 Hall PS, et al. Presented at SABCS Annual Meeting 2023. Poster #PO3-16-11. 11 Hartkopf AD, et al. Geburtshilfe Frauenheilkd. 2024;84(5):459–469.

关注并星标CPHI制药在线B7超家族是一类表达在抗原呈递细胞表面的跨膜蛋白，在T细胞免疫共抑制过程中发挥重要的作用。B7超家族成员包括：白细胞分化抗原80（CD80，B7.1）、CD86（B7.2）、B7-H1［程序性死亡受体-配体1（PD-L1）或CD274］、B7-DC（PD-L2或CD273）、B7-H2、B7-H3（CD276）、B7-H4、B7-H5、B7-H6、B7-H7等。其中B7-H3、B7-H4和B7-H5主要发挥免疫抑制作用，B7-H2和B7-H6具有协同刺激作用，而B7-H7具有双重免疫功能。B7H家族成员总览研究发现，B7超家族分子的表达受多种机制调节，在癌症的增殖、迁移、逃避、耐药和免疫逃避中发挥重要作用。因此，B7超家族成员被认为是肿瘤免疫治疗的潜力靶点，其中B7-H1（PD-L1）靶点已取得成功。据不完全统计，全球监管机构已批准多款B7-H1靶向药，如罗氏的阿替利珠单抗（Atezolizumab，Tecentriq）、默克的阿维鲁单抗（Avelumab，Bavencio）、阿斯利康的度伐利尤单抗（Durvalumab，Imfinzi）、基石药业/辉瑞的舒格利单抗（sugemalimab，择捷美）、康宁杰瑞的恩沃利单抗（envafolimab，恩维达）。其中阿替利珠单抗和度伐利尤单抗已进入重磅产品行列，2024年销售额分别为36.40亿瑞士法郎（约41.45亿美元）和47.17亿美元。然而，其他B7超家族靶点却进展缓慢，但其研发并未停止，尤其是B7-H3、B7-H4。近年来，B7-H3、B7-H4靶向药在坎坷中前进，已有多款药物进入临床后期。接下来笔者将详细介绍B7-H3、B7-H4靶向药的最新进展。B7-H3靶点及其靶向药进展B7-H3于2001年首次被发现并确定为B7超家族成员，与其他B7超家族成员的氨基酸同源性为20~27%。B7-H3仅在少数正常组织中低表达或不表达，但在多种恶性肿瘤和活化的肿瘤浸润免疫细胞中高表达，并与肿瘤细胞增殖、转移、治疗耐药和预后不良相关。目前，B7-H3配体尚不明确，研究发现其在肿瘤微环境（TME）中通过削弱T细胞应答、驱动肿瘤相关巨噬细胞（TAMs）向M2表型极化、抑制其他免疫细胞功能等免疫调节作用促进肿瘤进展。此外，B7-H3通过其非免疫功能促进肿瘤细胞增殖、迁移、侵袭、代谢紊乱、血管生成以及治疗抵抗，进而推动肿瘤进展。B7-H3信号通路据不完全统计，全球已有多款B7-H3靶向药进入临床试验阶段，详见下表。在研B7-H3靶向药以ADC为主，多款处于3期临床，适应症主要集中在小细胞肺癌。研发进度上，Omburtamab进展最快。该药是全球首个B7-H3靶向放射性核素偶联药物，其由纪念斯隆·凯特林癌症中心（MSK）基于其突破性抗体8H9开发，通过碘131标记实现针对中枢神经系统/软脑膜转移神经母细胞瘤（CNS/LM）的精准放疗，2015年Y-mAbs Therapeutics获得其全球独家授权，2020年赛生药业获得其在大中华区的独家授权。2022年6月，Omburtamab治疗儿童中枢神经系统/软脑膜转移的神经母细胞瘤的BLA获FDA优先审查。遗憾的是，2022年11月，Omburtamab惨遭FDA拒批。YL201、HS-20093、Ifinatamab Deruxtecan（I-DXd）、MHB088C四款处于3期临床，我国药企占据3款。其中宜联生物的YL201是采用其自主创新的TMALIN技术平台开发的一款B7-H3靶向ADC，2024年10月被CDE纳入突破性治疗品种，用于经初始含铂治疗失败的复发性小细胞肺癌（SCLC）。2025年6月被FDA授予治疗SCLC的突破性疗法认定。目前，YL201针对SCLC和鼻咽癌（NPC）患者的3期临床试验已经启动。《Nature Medicine》杂志上发表的YL201治疗晚期实体瘤的1期临床试验结果显示：在287名可评估患者中，ORR达40.8%，DCR达83.6%，mPFS为5.9个月，mDOR为6.3个月。其中广泛期小细胞肺癌（ES-SCLC）亚组的ORR达63.9%，DCR为91.7%，mPFS为6.3个月，mDOR为5.7个月。NPC亚组的ORR为48.6%，mPFS为7.8个月，mDOR为8.4个月。肺淋巴上皮瘤样癌（LELC）亚组的ORR为54.2%，mDOR为6.7个月。安全性方面，YL201耐受性良好，安全性总体可控。翰森制药的HS-20093是其自主开发的一款B7-H3靶向ADC，由全人源抗B7-H3单抗与拓扑异构酶抑制剂(TOPOi)有效载荷共价连接而成，2023年其全球（不含中国内地、中国香港、中国澳门及中国台湾）开发、生产和商业化独家权力授权给GSK。已公布的1期临床试验结果显示：HS-20093在SCLC、非小细胞肺癌和肉瘤中观察到初步临床活性，并确认了多种缓解，且安全性可控。HS-20093曾三次被CDE授予突破性疗法认定，分别用于经标准一线治疗（含铂双药化疗联合免疫）后进展的广泛期小细胞肺癌、经至少二线治疗后进展的骨肉瘤、经至少二线治疗后进展的骨肉瘤、既往经过含铂化疗后进展或复发的驱动基因阴性的局部晚期或转移性非鳞状非小细胞肺癌。此外，该药还被FDA授予突破性疗法认定，用于含铂化疗期间或之后进展的（复发或难治性）ES-SCLC。目前，HS-20093针对复发性SCLC、局限期SCLC和至少二线治疗后进展或不耐受的骨肉瘤的临床试验均已进入3期阶段。值得一提的是，该药是全球范首个启动骨肉瘤3期临床试验的B7-H3靶向ADC。第一三共的Ifinatamab deruxtecan是利用其专有的DXd ADC技术设计的一款潜在首 创B7-H3靶向ADC，曾被FDA和EMA授予治疗SCLC的孤儿药资格，目前已启动治疗SCLC、食管鳞癌和前列腺癌的3期临床。该药在接受过1-3线治疗(包括含铂化疗)的ES-SCLC患者中开展的2期试验Deate-Lung01剂量优化部分的中期分析结果显示：12 mg/kg (n=42) 和 8 mg/kg (n=46)剂量组的ORR分别为54.8%和26.1%，DoR分别为4.2个月和7.9个月，DCR分别为90.5%和80.4%，mPFS分别为5.5个月和4.2个月，OS分别为11.8个月和9.4个月。安全性方面，与之前试验中观察到的一致，没有发现新的安全信号。明慧医药的MHB088C是利用其专有的SuperTopoiTM ADC平台开发的创新B7-H3靶向ADC，其连接子和毒素均在第一三共的GGFG和Dxd上进行改进，毒素活性比DXd强5~10倍，DAR值为4。2024年ASCO大会上公布的MHB088C治疗复发/转移性实体瘤的1/2期研究数据显示：入组98例患者，在12名可评估反应的患者中，观察到5名部分缓解，ORR为41.7%，DCR为91.7%。在3名SCLC患者中，ORR为100.0%。2024年5月，MHB088C在国内启动3期临床试验，用于经含铂、PD-1/L1系统性治疗后进展或复发的ES-SCLC。时隔几日，明慧医药将MHB088C在大中华区（包括中国大陆、中国香港、中国澳门和中国台湾）的开发、生产和商业化权力授权给齐鲁制药，交易总金额达13.45 亿元。在研B7-H3靶向药大多处于1、2期临床，且药物类型多样，涉及双抗、双抗ADC、CAR-T、CARγδ T细胞疗法等，其中清辉联诺的QH104A是全球首个靶向B7-H3的通用型异体CARγδ T细胞疗法，2025年3月被FDA授予孤儿药资格认定，用于治疗恶性胶质瘤。我国药企积极布局B7-H3靶向药，尤其是信达生物，开发了B7-H3靶向双抗、ADC和双抗ADC。然而，B7-H3靶向药的开发并不顺利，仅MacroGenics就先后终止了3款B7-H3靶向药，即MGD009（CD3/B7-H3靶向双抗)、MGA271（B7-H3靶向单抗）、MGC018 （B7-H3靶向ADC）。武田在2025年5月公布2024财年第四季度业绩时砍掉了包括TAK-280（B7-H3B/CD3靶向双抗）在内的多个项目。不过，国内外药企并未放弃该靶点，且多款药物进入3期临床，期待该靶点早日迎来首 款药物。B7-H4靶点及其靶向药进展B7-H4于2003年被发现，与其他B7超家族成员有25%的同源性。B7-H4在正常组织中表达有限，但在多种肿瘤细胞（尤其是卵巢癌、胆管上皮癌、乳腺癌、子宫内膜癌）、抗原呈递细胞和肿瘤相关巨噬细胞中过表达。此外，在炎症、自身免疫性疾病、病毒感染或妊娠的个体中也可检测到B7-H4的异常表达。B7-H4是一种抑制性免疫检查点分子，主要通过与T细胞上的未知受体结合，抑制T细胞的激活与功能。在肿瘤中，B7-H4通过参与线粒体信号转导、IL6/JAK/STAT3、PI3K/AKT和CXCL12/CXCR4等信号通路在其发生发展和免疫调节中发挥关键作用。此外，B7-H4在多种肿瘤微环境中的高表达，与T细胞功能的衰竭、免疫逃逸以及肿瘤的耐药性密切相关。B7H4 的功能及调控机制据不完全统计，全球已有多款B7-H4靶向药进入临床试验阶段，详见下表。在研B7-H4靶向药以ADC为主，适应症主要集中在妇科肿瘤。研发进度上，在研药物大多处于1期临床。翰森制药的HS-20089进展最快，处于3期临床。该药是一款B7-H4靶向ADC，有效载荷为拓扑异构酶抑制剂（TOPOi），DAR值为6。1期临床试验数据显示：在44例晚期实体瘤（主要为乳腺癌）患者中，HS-20089的ORR达24.2%，DCR为63.6%，其中三阴乳腺癌亚组患者的ORR高达37.5%。2023年10月，GSK与翰森制药达成协议，以15.7亿美元的总交易额获得HS-20089的海外权益。2024年10月，HS-20089被CDE纳入突破性治疗品种，用于治疗铂耐药复发上皮性卵巢癌、输卵管癌或原发性腹膜癌。2025年3月，该药在国内启动3期临床，用于治疗铂耐药复发上皮性卵巢癌、输卵管癌或原发性腹膜癌。阿斯利康的puxitatug samrotecan（P-Sam，AZD8205)处于第二梯队，目前处于2期临床。该药是阿斯利康基于其自研的TOP1i平台开发的一款B7-H4靶向ADC，通过可裂解Linker将B7H4单抗INT016与新型拓扑异构酶1抑制剂（TOP1i）AZ'0132相连，DAR值为8。2025年3月，阿斯利康宣布P-Sam在治疗子宫内膜癌的早期研究中取得令人振奋的疗效数据：针对已接受过标准治疗（大多数接受过铂类化疗后进展）的晚期或转移性子宫内膜癌患者，P-Sam 2mg/kg和2.4mg/kg剂量组的ORR分别为34.6%和38.5%，且两剂量组均实现了平均7个月的PFS。然而，B7-H4靶向药的开发并不顺利，辉瑞基于已有的临床试验数据，在公布2024年财报时宣布终止Felmetatug vedotin的开发。该药是辉瑞收购Seagen时获得的一款ADC，已进入1/2期临床。而且，辉瑞、Genmab此前已先后终止B7-H4双抗项目，Mersana的B7-H4靶向ADC emiltatug ledadotin 在1期临床试验中也未能达到预期。总结B7超家族成员是肿瘤免疫免疫治疗的热门靶点，近年来B7-H3、B7-H4靶向药的开发日益火热。总体来看，B7-H3、B7-H4靶向在研药物以ADC为主，均被开发用于治疗实体瘤，但目前聚焦的适应症并不相同，其中B7-H3靶向药主要瞄准SCLC领域，而B7-H4靶向药主要瞄准妇科肿瘤。当前，在研B7-H3靶向药比B7-H4靶向药多，不过布局企业均有我国药企的身影，尤其是翰森药业，映恩生物。其中翰森药业在B7-H3、B7-H4靶向药领域走前最前列，相关项目均已进入3期临床。期待我国药企在B7-H3、B7-H4靶点早日大展身手，造福更多肿瘤患者。参考资料：1.《本土药企闪耀B7H4靶点，翰森制药有望率先突围》.CPHI制药在线.2025年05月09日2.《辉瑞被"B7-H4"绊了一跤》.bioSeedin柏思荟.2025年02月09日3.《重磅!B7-H4在自免和肿瘤中的临床进展大揭秘》.靶点圈.2025年03月14日4.《B7-H3：B7家族研究最多靶点，在研药物类型多样，首 款药物惨遭FDA拒批》.药渡Daily.2023年06月27日5.《13.75亿元！B7H3靶点迎来新交易，国内玩家谁能笑到最后？》.钱塘药闻.2025年05月13日END智药研习社近期直播预告来源：CPHI制药在线声明：本文仅代表作者观点，并不代表制药在线立场。本网站内容仅出于传递更多信息之目的。如需转载，请务必注明文章来源和作者。投稿邮箱：Kelly.Xiao@imsinoexpo.com▼更多制药资讯，请关注CPHI制药在线▼点击阅读原文，进入智药研习社~