Metformin degradation

Discussion in 'Canadian Drug' started by ni_x, 27-Aug-2019.

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    Metformin degradation


    Recent decades have shown intensive studies devoted to the fate of pharmaceuticals in the environment. These studies have involved the development of analytical tools, determination of pharmaceuticals in different compartments, composting technologies, and plant uptake of pharmaceuticals. The presence of organic pollutants in sewage sludge, including pharmaceuticals, is a problem of major concern. The r e - use of sewage sludge should be encouraged since it represents a long - term solution provided that the quality of the sludge re - used is compatible with public health and environmental protection requirements. Composting is a widely recognized way of making the soil application of sewage sludge safer. In this study, the impact of sewage sludge composting on the degradation of metformin (MET), by far the most often prescribed antidiabetic drug worldwide, and carbamazepine (CBZ), a poorly biodegradable but wid ely used as an anticonvulsant drug to cure depression and seizures, were analysed. The anaerobically digested and dewatered sewage sludge samples were collected from municipal wastewater treatment plant. Metformin has been reported to possess antitumor activity and maintain high cytotoxic T lymphocyte (CTL) immune surveillance. However, the functions and detailed mechanisms of metformin’s role in cancer immunity are not fully understood. Here, we show that metformin increases CTL activity by reducing the stability and membrane localization of programmed death ligand-1 (PD-L1). Furthermore, we discover that AMP-activated protein kinase (AMPK) activated by metformin directly phosphorylates S195 of PD-L1. S195 phosphorylation induces abnormal PD-L1 glycosylation, resulting in its ER accumulation and ER-associated protein degradation (ERAD). Consistently, tumor tissues from metformin-treated breast cancer patients exhibit reduced PD-L1 levels with AMPK activation. Blocking the inhibitory signal of PD-L1 by metformin enhances CTL activity against cancer cells.

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    May 12, 2003. Metformin HCI Extended-Release Tablets. drug substance, is very stable compound with a well characterized stability degradation pathway. Pathway. Gluconeogenesis is a pathway consisting of a series of eleven enzyme-catalyzed reactions. The pathway will begin in either the liver or kidney, in the mitochondria or cytoplasm of those cells, this being dependent on the substrate being used. Aug 10, 2017. Chemical, biological and physical degradation of drug. The aim of this study is to assess the stability of metformin HCl oral tablets 500 mg.

    Vol.06 No.11(2015), Article ID:60267,9 pages 10.4236/ajac.2015.611080 Development and Validation of a Method for Simultaneous Determination of Metformin and Saxagliptin in a Formulation by RP-HPLC P. This work is licensed under the Creative Commons Attribution International License (CC BY). Received 25 August 2015; accepted 11 October 2015; published 14 October 2015ABSTRACTA simple, specific, sensitive, precise and accurate reverse phase high performance liquid chromatographic method (RP-HPLC) was developed for the simultaneous analysis of Metformin and Saxagliptin in active pharmaceutical ingredients (APIs) as well as in marketed tablet (combination) dosage forms. [email protected] © 2015 by authors and Scientific Research Publishing Inc. The method was achieved on Enable C buffer (p H 4.5): Methanol: Acetonitrile ( %v/v) as a mobile phase at a flow rate of 0.6 m L/min and by employing UV detection at 220 nm wavelength. The retention time of Metformin and Saxagliptin were found to be 4.38 min and 6.92 min, respectively. The limit of detection (LOD) and limit of quantification (LOQ) of Metformin were found to be 0.112 µg/m L and 0.373 µg/m L, respectively, while those of Saxag- liptin were found to be 0.029 µg/m L and 0.096 µg/m L, respectively. The method was found to be rapid, sensitive, linear, specific, accurate, precise and economic for the quality control and stability assays of Metformin and Saxagliptin in marketed tablet dosage forms. Keywords: Metformin, Saxagliptin, Simultaneous Analysis, RP-HPLC, Stress Induced Degradation1. Introduction Metformin is an oral antidiabetic drug and is chemically, 1,1-dimethyl biguanide hydrochloride [1] . A new stability-indicating high-performance liquid chromatographic method has been developed for simultaneous analysis of metformin hydrochloride (MET) and sitagliptin phosphate (SIT) in pharmaceutical dosage forms. Chromatographic separation was achieved on a C, respectively. The relative standard deviations for intra and inter-day precision were below 1.5 %. The drugs were subjected to a variety of stress conditions—acidic and basic hydrolysis, and oxidative, photolytic, neutral, and thermal degradation. The products obtained from photolytic degradation were similar to those from neutral hydrolytic degradation and different from produced by acidic and basic hydrolysis. The method resulted in detection of 15 degradation products (D1–D15); among these, the structures of D1, D3, D9, and D13 were identified. The respective mass balance for MET and SIT was found to be close to 97.60 and 99.12 %.

    Metformin degradation

    On the degradation of metformin and carbamazepine residues in., Gluconeogenesis - Wikipedia

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  4. Aug 16, 2018. Abnormal PD-L1 glycosylation induced by pS195 leads to PD-L1 degradation by ERAD. •. Combination therapy with metformin and anti-CTLA4.

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    Incomplete aerobic degradation of the antidiabetic drug Metformin and identification of the bacterial dead-end transformation product. Berberine is a compound extracted from a variety of herbs. It is supplemented for its anti-diabetic effects, which rival the potency of some pharmaceuticals. Vincent I hope autophagy is of great benifit for healthy aging and increased lifespan. I know my glucose, lipid, and IGF-1 seem to have responded favorably to years of Intermittent fasting and a recent change to an even more ketogenic diet.

     
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