Browsing by Author "Pandey, Abhay K."

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Antitubercular drugs: possible role of natural products acting as antituberculosis medication in overcoming drug resistance and drug-induced hepatotoxicity
(Springer Science and Business Media Deutschland GmbH, 2023-09-04T00:00:00) Rana, Harvesh Kumar; Singh, Amit Kumar; Kumar, Ramesh; Pandey, Abhay K.
Mycobacterium tuberculosis (Mtb) is a pathogenic bacterium which causes tuberculosis (TB). TB control programmes are facing threats from drug resistance. Multidrug-resistant (MDR) and extensively drug-resistant (XDR) Mtb strains need longer and more expensive treatment with many medications resulting in more adverse effects and decreased chances of treatment outcomes. The World Health Organization (WHO) has emphasised the development of not just new individual anti-TB drugs, but also novel medication regimens as an alternative treatment option for the drug-resistant Mtb strains. Many plants, as well as marine creatures (sponge; Haliclona sp.) and fungi, have been continuously used to treat TB in various traditional treatment systems around the world, providing an almost limitless supply of active components. Natural products, in addition to their anti-mycobacterial action, can be used as adjuvant therapy to increase the efficacy of conventional anti-mycobacterial medications, reduce their side effects, and reverse MDR Mtb strain due to Mycobacterium�s genetic flexibility and environmental adaptation. Several natural compounds such as quercetin, ursolic acid, berberine, thymoquinone, curcumin, phloretin, and propolis have shown potential anti-mycobacterial efficacy and are still being explored in preclinical and clinical investigations for confirmation of their efficacy and safety as anti-TB medication. However, more high-level randomized clinical trials are desperately required. The current review provides an overview of drug-resistant TB along with the latest anti-TB medications, drug-induced hepatotoxicity and oxidative stress. Further, the role and mechanisms of action of first and second-line anti-TB drugs and new drugs have been highlighted. Finally, the role of natural compounds as anti-TB medication and hepatoprotectants�have been described and their mechanisms discussed. � 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
Oxidative Stress-Related MicroRNAs 6 as Diagnostic Markers: A Newer Insight in Diagnostics
(Springer, 2017) Kumar, Shashank; Pandey, Abhay K.
Despite rapid strides in the medical and technological fields during the last four decades including the development of nucleic acid and protein-based biomarkers, the mortality still remains a burning problem because of the delayed diagnosis of many diseases. This is particularly ascribed to the lower specificity and sensitivity of the methods used for diagnosis. The compelling situation has shifted the focus of expression biology toward identification and development of sensitive and specific markers for diagnosis and prognosis of different diseases by using microRNAs (miRNAs). miRNAs are short noncoding RNAs of 18–25 nucleotides. In mammals and multicellular organisms, they play significant role in nearly all biological pathways. Next-generation sequencing techniques have played role in discovery of noncoding RNA molecules. As compared to total protein coding sequences, large numbers of noncoding RNAs exist which are key to many new discoveries related to biological phenomena and pathologies. Noncoding RNA family in humans consists of about 1400 miRNAs. Their functional significance has been shown in developmental and pathological processes. miRNAs can be easily detected in tissue samples and body fluid of the patients. Hence, miRNAs could act as potential biomarker candidates. miRNA molecules have already made their way to clinical medicine as biomarkers for diagnosis and prognosis of diseases as well as therapeutic targets for treatment. Redox imbalance leads to oxidative stress which is associated with various diseases. Accumulated evidence suggests that oxidative stress stimulates production of several miRNAs which area known as oxidative stress-responsive miRNAs. They further play a role in connecting the dysregulated antioxidant defense system with imbalanced redox state. The present chapter summarizes recent findings on diagnostic and prognostic ability of oxidative stress-responsive miRNAs. In addition, the role of miRNAs in cancer has also been discussed. Studies on functional and regulatory aspects of oxidative stress-associated miRNAs will provide new direction to discovery of novel diagnostic and prognostic biomarkers.
Oxidative stress-related microRNAs as diagnostic markers: A newer insight in diagnostics
(Springer Singapore, 2017) Kumar, Shashank; Pandey, Abhay K.
[No abstract available]
Pharmacological potential of serially extracted Solanum xanthocarpum fruit extracts and their phytochemical characterization
(Taylor and Francis Ltd., 2022-05-23T00:00:00) Kumar, Shashank; Pandey, Abhay K.
Pharmacological potential of serially extracted Solanum xanthocarpum fruit (SXF) extracts in terms of antioxidant, anticancer, and antibacterial activities was evaluated. Chemical characterization of the potent extract was done by HPLC, LC-MS-MS, and GC-MS techniques. In vitro antioxidant models, viz. hydroxyl radical scavenging, metal ion chelation, total antioxidant capacity, and ferric reducing antioxidant power, were used to assess the antioxidant potential of extract. Cytotoxicity of the SXF extracts was tested against prostate, ovary, and breast cancer cell lines (DU-145, IGR-OV-1, and MCF-7) using sulforhodamine (SRB) assay. The antibacterial potential was assessed against Staphylococcus aureus, Enterococcus faecalis, Pseudomonas aeruginosa, Klebsiella pneumonia, and Escherichia coli bacteria. Results indicated potential pharmacological activities and the presence of pharmacologically active phytoconstituents in the SKF extracts. � 2022 Taylor & Francis Group, LLC.