Publications by authors named "Raman K Sharma"

Article Synopsis
  • India has a significant TB problem, accounting for 26% of global cases, with high death rates and serious health impacts.
  • Disseminated TB, which is found in <2% of immunocompromised patients and 20% of extrapulmonary cases, has a mortality rate close to 25-30%.
  • The case study highlights a young female patient who was diagnosed with disseminated TB exhibiting symptoms like nosebleeds and low platelet count.
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Background: Metabolic syndrome is defined as a state of metabolic dysregulation characterized by insulin resistance, a predisposition to Type 2 diabetes mellitus and atherosclerotic vascular disease. The changing hormonal milieu with altered estrogen and testosterone ratio is the cause of metabolic syndrome at menopausal transition.

Aims And Objectives: This study was designed to determine the incidence of metabolic syndrome and its various components in premenopausal and postmenopausal women from Punjab.

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A series of peracetylated O-aryl α,β-d-ribofuranosides have been synthesized and an efficient biocatalytic methodology has been developed for the separation of their anomers which was otherwise almost impossible by column chromatographic or other techniques. The incubation of 2,3,5-tri-O-acetyl-1-O-aryl-α,β-d-ribofuranoside with Lipozyme® TL IM immobilized on silica led to the selective deacetylation of only one acetoxy group, viz the C-5'-O-acetoxy group of the α-anomer over the other acetoxy groups derived from the two secondary hydroxyl groups present in the molecule and also over three acetoxy groups (derived from one primary and two secondary hydroxyls of the β-anomer). This methodology led to the easy synthesis of both, α- and β-anomers of O-aryl d-ribofuranosides.

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The protein acetyltransferase (MTAase) function of glutamine synthetase of Mycobacterium smegmatis was established earlier. In this paper, studies were undertaken to examine MTAase function of recombinant glutamine synthetase (rGlnA1) of Mycobacterium tuberculosis, which showed >80% similarity with M. smegmatis GlnA.

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A series of 3-(N-alkyl-N-phenylamino)propan-2-ol derivatives were synthesized from epichlorohydrine in a multi-step strategy and were evaluated as Src kinase inhibitors. First, epoxy ring opening of epichlorohydrine was carried out in the presence of N-alkylanilines to yield 3-(N-alkyl-N-phenylamino)-1-chloro-propan-2-ol derivatives using Ca(OTf)2 as catalyst based on our previous studies [1]. Second, ring closure was performed under basic conditions to afford N-epoxymethyl N-alkylaniline derivatives.

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DZ-697b is a new orally active antiplatelet agent that inhibits collagen and ristocetin-mediated platelet activation. It does not require metabolisation to generate its active compound and has a safer profile than clopidogrel in pre-clinical studies. We compared the antithrombotic effects and bleeding time prolongations of three DZ-697b doses with clopidogrel 300 mg.

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Novel, efficient and selective biocatalytic acylation / deacylation strategies have been used for the greener synthesis of precursors of different bicyclonucleosides. Biocatalytic methodology has also been developed for the separation of pyrano- and furanonucleosides, which is otherwise almost impossible to achieve by usual chemical approach.

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