Alitretinoin

Utilizing the Crosstalk Among Chicoric Acid, 13-Cis Retinoic Acid(Aerosolized), Minocycline and Vitamin D as a Potent Quadrate Therapy for treating patients with Multidrug-resistant TB and patient with both Multidrug-resistant TB and COVID-19 . A double-edged sword Clinical Study
I)Part of Tuberculosis
Tuberculosis (TB) is a major infectious disease killer globally. It affected 10 million and killed 1.4 million people in 2019 alone. The predicted impact of the COVID-19 pandemic is an additional 190,000 TB deaths in 2020, and it is expected in the next 5 y that there will be up to a 20% increase in the global TB disease burden , stressing the critical need for new safe and effective drugs against Mycobacterium tuberculosis (Mtb). In addition, controlling multidrug-resistant TB (MDR-TB) presents a huge public health challenge . New drug discovery could require several years with no guarantee but repurposing established may be useful to treat patients with tuberculosis . Here we demonstrate that we could utilize the crosstalk among Chicoric Acid, 13-Cis Retinoic Acid, Minocycline , and vitamin D as a novel quadrate therapy against TB.Drug-resistant tuberculosis represents a global emergency, requiring new drugs. Recently Minocycline was found to be highly potent in laboratory strains of Mycobacterium TB, and 30 drug-sensitive and multidrug/extensively drug-resistant clinical strains were susceptible to clinically attainable dosages. The lung concentration-time profiles of a 7 mg/kg/day human-equivalent minocycline dosage yielded bacterial kill rates comparable to first-line antituberculosis drugs. Extracellular bacilli were destroyed directly by minocycline. Minocycline also killed intracellular bacilli indirectly through granzyme A-driven apoptosis. Furthermore, minocycline showed dose-dependent antiinflammatory effect, suggesting that it may protect tuberculosis patients against immunopathology. A study showed that M. tuberculosis induced the expression of indoleamine 2,3-dioxygenase (IDO), an enzyme involved in tryptophan catabolism, in macrophages and in the lungs of animals (mice and macaque) with active disease. In a macaque model of inhalation TB, suppression of IDO activity reduced bacterial burden, pathology, and clinical signs of TB disease, leading to increased host survival. This increased protection was accompanied by increased lung T cell proliferation, induction of inducible bronchus-associated lymphoid tissue and correlates of bacterial killing . A recent study showed that Minocycline-induced significantly inhibition of IDO expression. But Minocycline-induced inhibition of IDO expression is retinoid-dependent. The combined treatment with minocycline and retinol, however, resulted in a striking, statistically significant decrease in IDO. Co-treatment with minocycline and retinol again resulted in decreased TNF-α and IL-6 levels. A study showed that IL-6 inhibits IFN-γ induced autophagy in Mycobacterium (TB) H37Rv infected macrophages. As well as neutralization of endogenous IL-6 by anti-IL-6 antibody significantly enhances the IFN-γ mediated killing of the intracellular bacteria. Minocycline's anti-inflammatory effects are mediated through RAR signaling. Therefore, The combined treatment with minocycline and retinol is expected to effectively inhibit (TB) and its inflammatory complication, Fortunately, Retinoic Acid significantly inhibits the in vivo growth of M. tuberculosis and the development of tuberculosis. In addition to, 13-Cis RA and Chicoric Acid ( CA ) enhanced the cell surface expression of HLA-DR and CD14 molecules on U937 macrophages and prevented the growth of Mtb within macrophages. Moreover, 13-cis RA and CA, have increased NO generation compared to untreated control macrophages, significantly . Both drugs have a significant inhibitory effect on Mtb growth but CA at the highest concentration was more potent than 13-cis RA . Therefore we will use retinoic acid to induce the effect of Minocycline as well as its ability to inhibit tuberculosis in combination with CA .Recent data showed that Vitamin D support innate immune responses to Mycobacterium TB and Low vitamin D levels were associated with a 5-fold increased risk for progression to tuberculosis. Deficiency of vitamin D has long been implicated in activation of (TB) . Serum vitamin D in TB patients are lower than in healthy controls . Vitamin D has been found to speed up the clearance of (TB) bacteria from the lungs of people with multi-drug resistant TB, according to a study of 1,850 patients. It was showed that Vitamin D receptor (VDR) must form a heterodimer complex with retinoid X receptor (RXR) to regulate gene transcription. Retinol plays a crucial role in lung development and signaling the vitamin D pathway. 9-cis-retinoic acid, an active vitamin A metabolite and the ligand of RXR, assists VDR signaling and suppresses the degradation of circulating vitamin D.