Publications by authors named "Ramasamy Ramesh"

Insufficient energy intake to meet energy expenditure demands of physical activity can result in systemic neuroendocrine and metabolic abnormalities in activity-dependent anorexia and relative energy deficiency in sport (REDs). REDs affects >40% of athletes, yet the lack of underlying molecular changes has been a hurdle to have a better understanding of REDs and its treatment. To assess the molecular changes in response to energy deficiency, we implemented the "exercise-for-food" paradigm, in which food reward size is determined by wheel-running activity.

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Plasticity in daily timing of activity has been observed in many species, yet the underlying mechanisms driving nocturnality and diurnality are unknown. By regulating how much wheel-running activity will be rewarded with a food pellet, we can manipulate energy balance and switch mice to be nocturnal or diurnal. Here, we present the rhythmic transcriptome of 21 tissues, including 17 brain regions, sampled every 4 h over a 24-h period from nocturnal and diurnal male CBA/CaJ mice.

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Time-restricted feeding (TRF) is an emerging behavioral nutrition intervention that involves a daily cycle of feeding and fasting. In both animals and humans, TRF has pleiotropic health benefits that arise from multiple organ systems, yet the molecular basis of TRF-mediated benefits is not well understood. Here, we subjected mice to isocaloric ad libitum feeding (ALF) or TRF of a western diet and examined gene expression changes in samples taken from 22 organs and brain regions collected every 2 h over a 24-h period.

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Article Synopsis
  • Soil-borne plant pathogens, particularly Agrobacterium tumefaciens and various Phytophthora species, pose significant challenges to walnut production worldwide.
  • Researchers mapped resistance genes in Juglans microcarpa, a wild walnut species, by crossing it with cultivated walnuts and creating hybrids.
  • A key resistant haplotype was identified on chromosome 4D that could be used in breeding programs to develop walnut rootstocks resistant to these serious soil-borne diseases.
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We introgressed wheatgrass germplasm from the octoploid amphiploid Triticum aestivum× Lophopyrum elongatum into wheat by manipulating the wheat Ph1 gene and discovered and characterized 130 introgression lines harboring single or, in various combinations, complete and recombined L. elongatum chromosomes. Diploid wheatgrass Lophopyrum elongatum (genomes EE) possesses valuable traits for wheat genetics and breeding.

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Diabetic retinopathy (DR) is the most common cause for preventable blindness in India. The onset of micro and macrovascular complications in T2DM is multifactorial and difficult to predict. The status of micronutrients, several inflammatory cytokines, elevated triacylglycerols, oxidative stress etc.

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Article Synopsis
  • * SNP markers showed higher projection success (92.2%) than SSR markers (66.2%), and the distribution of QTL varied along chromosome arms, peaking in the proximal sections and declining distally.
  • * A web portal was created for meta-analysis of projected QTL, featuring hypothesis tests and standard deviation estimations to analyze specific traits, exemplified by a study on head blight resistance in wheat.
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Homology was searched with genes annotated in the Aegilops tauschii pseudomolecules against genes annotated in the pseudomolecules of tetraploid wild emmer wheat, Brachypodium distachyon, sorghum and rice. Similar searches were performed with genes annotated in the rice pseudomolecules. Matrices of collinear genes and rearrangements in their order were constructed.

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Context: Type 2 diabetes mellitus has profound implications on the skeleton. Even though bone mineral density is increased in type 2 diabetes mellitus patients, they are more prone for fractures. The weakening of bone tissue in type 2 diabetes mellitus can be due to uncontrolled blood sugar levels leading to high levels of bone turnover markers in blood.

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Article Synopsis
  • Aegilops tauschii is the diploid ancestor of the D genome in hexaploid wheat and serves as a crucial genetic resource for wheat development.* -
  • Researchers utilized advanced sequencing techniques to create a high-quality reference genome for a specific strain of Ae. tauschii, revealing a genome rich in repetitive sequences and dispersed duplicated genes.* -
  • The study indicates that the unique repetitive structure of the Ae. tauschii genome contributes to rapid evolutionary changes in its chromosomes, affecting gene duplication and recombination rates.*
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Wild emmer ( ssp. ) is a progenitor of all cultivated wheat grown today. It has been hypothesized that emmer was domesticated in the Karaca Dağ region in southeastern Turkey.

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Context: Recently, non-communicable diseases have snatched the lead from infectious diseases in causing mortality. Of these, oral cancer accounts for a significant proportion of deaths. Every year in India significant percentage of newly diagnosed malignancy is oral cancer attributed to various reasons.

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Aim: To quantify the level of serum malondialdehyde and extent of DNA damage using comet assay in patients with oral submucous fibrosis (SMF) in comparison to normal individuals and to correlate the extent of DNA damage with MDA levels.

Methods: Study included 30 cases of SMF (n = 30) and equal number of healthy volunteers. Serum malondialdehyde was measured using the thiobarbituric-trichloroacetitic acid (TBA-TCA) method.

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Background: Hypertensive disorders in pregnancy (HDP) complicate 3-10% of all pregnancies. Though there are several biochemical parameters which aid in predicting hypertension of pregnancy, human placental alkaline phosphatase (PLAP), synthesized in placenta during pregnancy by placental syncytiotrophoblast, assumes diagnostic relevance. The purpose of this study was to compare the total alkaline phosphatase (ALP) and heat stable placental alkaline phosphatase (PLAP) levels in the serum of normotensive and hypertensive disorders of pregnancy and to evaluate the clinical utility of ALP and PLAP as a reliable, sensitive, specific and economical biochemical marker of HDP.

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Background: Understanding structure of the population is one of the major objective of many genetic studies. The program STRUCTURE is commonly used to infer population structure using multi-locus genotype data. However, a tool with graphical-user interface is currently not available to visualize STRUCTURE bar plots.

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Biosensors are small devices that employ biological/biochemical reactions for detecting target analytes. Basically, the device consists of a biocatalyst and a transducer. The biocatalyst may be a cell, tissue, enzyme or even an oligonucleotide.

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Background: Ischemic heart disease accounts 12.2% deaths worldwide. Serum magnesium (Mg+) status is often ignored in Acute Myocardial Infarction (AMI).

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Purpose: The medical education is recently being transformed into several domains in order to adapt to the need and the value based academics which is required for the quality doctors who serve the community. Presently, the biochemistry curricula for the graduate students of medicine have been questioned by as many experts, because of their multiple lacunae. In this review, we would like to highlight the scenario which is related to the existing biochemistry curricula for graduate medical students, which have been followed in several medical schools and universities and we also hope to share our ideas for implementing objective and pragmatic curricula.

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