Phase 1, Randomised, Open-label, 3-way Crossover Study to Evaluate the Safety, Tolerability, Pharmacokinetics (With Food Effect), and Relative Bioavailability of NTP42:KVA4 Given as a Capsule, Compared With a Liquid, in Healthy Volunteers

This Phase 1 clinical trial will assess the safety, tolerability and pharmacokinetics (PK) of a solid capsule form of NTP42:KVA4 in male and female healthy volunteers. In a randomised, 3-way cross-over study, the Trial will involve 3 dose sessions where all volunteers will receive 3 single doses of NTP42:KVA4. In two of the dose sessions, volunteers will be fasted where, in one, they will be given the NTP42:KVA4 capsule and, in another, they will be given NTP42:KVA4 in oral liquid form. To test the effect of food on drug absorption (PK), the volunteers will also be given the NTP42:KVA4 capsule after eating a full breakfast.

开始日期2023-11-24

申办/合作机构

Atxa Therapeutics Ltd.初创企业

[+1]

NCT04919863 / Completed临床1期

A Phase I Trial to Evaluate the Safety, Tolerability and Pharmacokinetics of Single and Multiple Ascending Doses of NTP42:KVA4 in Healthy Volunteers

A Phase I clinical trial to assess the safety, tolerability, and pharmacokinetics of NTP42:KVA4 following oral administration in a randomized, double-blind, placebo-controlled trial. The trial will involve of 2 phases, a single ascending dose (SAD) phase and a multiple ascending dose (MAD) phase. The SAD phase will incorporate a food effect arm.

开始日期2021-05-24

申办/合作机构

Atxa Therapeutics Ltd.初创企业

[+1]

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2023-05-01·B59. BREAKING BAD: NEW DRUGS AND FORMULATIONS FOR PULMONARY HYPERTENSION AND RV FAILURE

A Phase I Clinical Trial Assessing the Safety, Tolerability and Pharmacokinetics and Pharmacodynamics of NTP42:KVA4, a Novel Thromboxane Receptor Antagonist, in Healthy Subjects

作者: Boyce, M. ; Mulvaney, E.P. ; Kinsella, B.T. ; Reid, H.M. ; Perkins, C.M. ; Maginn, M. ; Yamamoto, T.

2021-10-12·European Heart Journal

The thromboxane receptor antagonist NTP42 improves haemodynamics, inhibits remodelling, and restores function within the cardiopulmonary system in preclinical pulmonary arterial hypertension models

作者: Kinsella, B T ; Mulvaney, E ; Renzo, F

AbstractBackgroundPulmonary arterial hypertension (PAH) is a rare and fatal disease characterised by a progressive increase of pulmonary artery pressure leading to right heart failure. While current PAH therapies provide symptomatic relief and some improvement in quality of life, they show limited benefit in preventing disease progression and often have severe side effects. Recent studies by us reported that a novel thromboxane A2 receptor (TP) antagonist NTP42 attenuated multiple disease hallmarks of PAH in two preclinical models of the disease.PurposeThe aim of this study was to assess the efficacy of a novel oral formulation of NTP42 developed for pharmaceutical use on monocrotaline (MCT)-induced PAH in rats across a range of cardiopulmonary parameters, and when compared with standard of care (SOC) PAH therapies. It also aimed to evaluate the expression of the TP, the target receptor for NTP42, in tissues from the MCT-induced PAH model and related disease models.MethodsPAH was induced by subcutaneous injection of 60 mg/kg MCT. Rats were randomly assigned to 7 groups: (1) No MCT; (2) MCT Only; (3) MCT+NTP42 Formulation (1 mg/kg); (4) MCT+Sildenafil (50 mg/kg); (5) MCT+Macitentan (30 mg/kg), (6) MCT+Selexipag (1 mg/kg), and (7) MCT+Riociguat (5 mg/kg), where in all cases twice-daily oral dosing was initiated 7 days post-MCT and continued for 22 days.ResultsThe results show that the formulated NTP42 reduced the severity of MCT-induced PAH as determined from haemodynamic measurements of mean pulmonary artery pressure (mPAP) and right ventricular systolic pressure (RVSP), Fulton's Index of cardiac hypertrophy and histological assessments of pulmonary vascular remodelling, pulmonary oedema, inflammation and fibrosis, and right ventricular fibrosis. In addition, these assessments showed that NTP42 inhibited these effects at least to a similar extent relative to the SOC drugs Sildenafil, Macitentan, Selexipag and Riociguat. Notably, unlike most of the PAH SOCs, NTP42 had no adverse effects on liver weight and or on hepatic histopathology. Importantly, NTP42 had no effects on either the systemic mean arterial pressure (mAP) or heart rate (HR). Furthermore, while abundant expression of the target TP was noted in numerous cell and tissue types of both cardiac and pulmonary tissue, there were highly significant upregulations of TP expression observed following PAH-induction (RV, >2-fold, p=0.0002).ConclusionsTaken together, these data demonstrate that NTP42 significantly attenuates MCT-induced PAH and to a similar or greater extent relative to market leader PAH SOC drugs. Notably, we reveal that expression of the TP, the target receptor for NTP42, was shown to be highly significantly upregulated throughout the cardiopulmonary system, validating the potential importance of this largely ignored PAH target ripe for pharmaceutical intervention.Funding AcknowledgementType of funding sources: Public grant(s) – EU funding. Main funding source(s): EU Horizon 2020 SME Instrument

NTP42, a novel antagonist of the thromboxane receptor, attenuates experimentally induced pulmonary arterial hypertension

作者: Kinsella, B. Therese ; Salvail, Dany ; Mulvaney, Eamon ; Reid, Helen ; Bialesova, Lucia ; Bouchard, Annie

AbstractBackground NTP42 is a novel antagonist of the thromboxane prostanoid receptor (TP), currently in development for the treatment of pulmonary arterial hypertension (PAH). PAH is a devastating disease with multiple pathophysiological hallmarks including excessive pulmonary vasoconstriction, vascular remodelling, inflammation, fibrosis, in situ thrombosis and right ventricular hypertrophy. Signalling through the TP, thromboxane (TX) A2 is a potent vasoconstrictor and mediator of platelet aggregation. It is also a pro-mitogenic, pro-inflammatory and pro-fibrotic agent. Moreover, the TP also mediates the adverse actions of the isoprostane 8-iso-prostaglandin F2α, a free-radical-derived product of arachidonic acid produced in abundance during oxidative injury. Mechanistically, TP antagonists should treat most of the hallmarks of PAH, including inhibiting the excessive vasoconstriction and pulmonary artery remodelling, in situ thrombosis, inflammation and fibrosis. This study aimed to investigate the efficacy of NTP42 in the monocrotaline (MCT)-induced PAH rat model, alongside current standard-of-care drugs. Methods PAH was induced by subcutaneous injection of 60 mg/kg MCT in male Wistar–Kyoto rats. Animals were assigned into groups: 1. ‘No MCT’; 2. ‘MCT Only’; 3. MCT + NTP42 (0.25 mg/kg BID); 4. MCT + Sildenafil (50 mg/kg BID), and 5. MCT + Selexipag (1 mg/kg BID), where 28-day drug treatment was initiated within 24 h post-MCT. Results From haemodynamic assessments, NTP42 reduced the MCT-induced PAH, including mean pulmonary arterial pressure (mPAP) and right systolic ventricular pressure (RSVP), being at least comparable to the standard-of-care drugs Sildenafil or Selexipag in bringing about these effects. Moreover, NTP42 was superior to Sildenafil and Selexipag in significantly reducing pulmonary vascular remodelling, inflammatory mast cell infiltration and fibrosis in MCT-treated animals. Conclusions These findings suggest that NTP42 and antagonism of the TP signalling pathway have a relevant role in alleviating the pathophysiology of PAH, representing a novel therapeutic target with marked benefits over existing standard-of-care therapies.

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