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Sökning: WFRF:(Purushothaman S.) > (2015-2019)

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1.
  • Purushothaman, S, et al. (författare)
  • Transcriptomic and Proteomic analyses of Amphiura filiformis arm tissue-undergoing regeneration
  • 2015
  • Ingår i: Journal of Proteomics. - : Elsevier BV. - 1874-3919. ; 112, s. 113-124
  • Tidskriftsartikel (refereegranskat)abstract
    • The extensive arm regeneration of brittle stars following amputation is becoming increasingly recognized as a model system for understanding cellular differentiation and regeneration in a whole animal context. In this study we have used the emerging brittle star model Amphiura filiformis to investigate the initial step of the regeneration process- the early repair phase, at the transcriptome and proteome level. Arm tissues were collected at 1 and 3 days post amputation and were analyzed for the differential expression at the transcript and proteome level. A total of 694 genes and 194 proteins were found undergoing differential expression during the initiation of regeneration process. Comparison of transcriptomic and proteomic analysis showed 23 genes/proteins commonly between them with 40% having similar expression patterns. Validation of 33 differentially regulated genes based on RTPCR showed 22 and 19 genes expression as similar to the transcriptome expression during the first and third day post amputation respectively. Based on cellular network and molecular pathway analysis it was found that the differentially regulated transcripts and proteins were involved in structural and developmental network pathways such as cytoskeleton remodeling, cell adhesion integrin and translation initiation pathways for the instigation of regeneration process in brittle star. Biological significance This study identified various genes and proteins involved in brittle star arm regeneration based on high throughput transcriptomics and proteomics studies. In this study the genes and proteins associated with regeneration were validated and mapped for biological and molecular pathways involved in regeneration mechanism. This study will lead to discovery of marker associated with tissue or organ regeneration.
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2.
  • Shanthakumar, S P, et al. (författare)
  • Broad spectrum antimicrobial compounds from the bacterium Exiguobacterium mexicanum MSSRFS9.
  • 2015
  • Ingår i: Microbiological Research. - : Elsevier BV. - 1618-0623 .- 0944-5013. ; 178, s. 59-65
  • Tidskriftsartikel (refereegranskat)abstract
    • Clinical bacterial pathogens front a major challenge for the clinical researchers and physicians. In particular microbial pathogens like Escherichia coli, Shigella flexneri, Klebsiella pneumonia and Salmonella enterica are apparelled with systemic machineries to bring down the human immune system as well as proliferate dramatically in a short period which in turn cause a pronounced ailment to the human health. In vitro evaluation of four purified compounds isolated from rhizosphere bacterium Exiguobacterium mexicanum tested against clinical pathogens mentioned above by disc diffusion method showed the two compounds viz., 3,6,18-trione, 9,10-dihydro-12'-hydroxyl-2methyl-5-(phenyl methyl) (5'-alpha, 10-alpha)-dihydroergotamine (C3) and dipropyl - S-propyl ester (C4) exhibit antibacterial property against all the tested pathogens. Among the four clinical pathogens tested, compound C3 has shown higher zone of inhibition against S. enterica with 17±0mm, followed by S. flexneri with 16.5±0.7mm, E. coli with 15±0mm and K. pneumoniae with 14±0mm, respectively. The compound C4 has shown higher antimicrobial activity against S. enterica with 21.5±0.7mm zone of inhibition, followed by S. flexneri with 19.5±0.7mm, E. coli with 17±0mm and K. pneumoniae with 16±0mm, these two compounds were found to be safer when subjected to rat haematological and enzymatic analysis.
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