Publications by authors named "Karthikeyan Raman"

Nucleosomes are non-uniformly distributed across eukaryotic genomes, with stretches of 'open' chromatin strongly associated with transcriptionally active promoters and enhancers. Understanding chromatin accessibility patterns in normal tissue and how they are altered in pathologies can provide critical insights to development and disease. With the advent of high-throughput sequencing, a variety of strategies have been devised to identify open regions across the genome, including DNase-seq, MNase-seq, FAIRE-seq, ATAC-seq, and NicE-seq.

View Article and Find Full Text PDF

Exosomal cargo secreted from cancer cells has been associated with the development and progression of the tumour. Enriching clinically relevant tissue-specific exosomes may assist in the focused analysis of RNA molecules packaged during cancer. Therefore, this study utilized a rapid immunomagnetic enrichment approach for targeted isolation of lung cancer cell-derived exosomes from human plasma, followed by analysing their cargo RNA using high throughput sequencing.

View Article and Find Full Text PDF

Membrane vesicles (MVs) serve as an essential virulence factor in several pathogenic bacteria. The release of MVs by is only recently recognized; still, the enigmatic role of MVs in pathogenesis is yet to be established. We report the transcriptome response of Caco-2 cells upon exposure to MVs and the L.

View Article and Find Full Text PDF

Escherichia coli Nissle 1917 (EcN) is an efficient probiotic strain extensively used worldwide because of its several health benefits. Adhesion to the intestinal cells is one of the prerequisites for a probiotic strain. To identify the genes essential for the adhesion of EcN on the intestinal cells, we utilized a quantitative genetic footprinting approach called transposon insertion sequencing (INSeq).

View Article and Find Full Text PDF
Article Synopsis
  • - The rise of multidrug-resistant pathogens is becoming a major clinical issue, making the search for new antibiotics urgent, with the genus Paenibacillus being a promising source for potential antibiotic compounds.
  • - Researchers isolated Paenibacillus alvei strain JR949 from soil, which demonstrated antimicrobial activity against various pathogenic bacteria, and sequenced its genome to explore its biosynthetic capabilities.
  • - Genome analysis revealed 31 gene clusters related to secondary metabolite production, including well-known and novel antimicrobial compounds, indicating that further studies could lead to the development of new antibiotics.
View Article and Find Full Text PDF

Membrane vesicles (MVs) are naturally secreted by many pathogenic organisms and have various functions that include the release of microbial virulence factors that contributes to pathogenesis. However, very little is known regarding the function of Gram-positive bacteria membrane vesicles. Here, we investigated the functional role of membrane vesicles of Listeria monocytogenes.

View Article and Find Full Text PDF

The proportion of people suffering from cardiovascular diseases has risen by 34% in the last 15 years in India. Cardiomyopathy is among the many forms of CVD s present. Infection of heart muscles is the suspected etiological agent for the same.

View Article and Find Full Text PDF

Membrane vesicles (MVs) are produced by various Gram positive and Gram negative pathogenic bacteria and play an important role in virulence. In this study, the membrane vesicles (MVs) of L. monocytogenes were isolated from the culture supernatant.

View Article and Find Full Text PDF

Methicillin-resistant (MRSA) is a multidrug-resistant pathogen and one of the leading causes of nosocomial infection worldwide. Probiotic bacteria play a significant role in preventive or therapeutic interventions of gastrointestinal infections in human as well as animals. In this study, we have investigated the adhesion property of the probiotic strain MTCC 8711 and its ability to prevent the adhesion of MRSA to human colon adenocarcinoma cells, Caco-2.

View Article and Find Full Text PDF

Listeria monocytogenes, an important bacterial pathogen, is responsible for foodborne illnesses worldwide. Examination of food samples for the presence of L. monocytogenes and assessment of their pathogenicity is usually an effective strategy in the prevention of listeriosis.

View Article and Find Full Text PDF