Biology subjects

Taneja, P.

Publications and source records attributed to Taneja, P..

3 recordsLinked to original sources

bioRxiv2020

Anti-microbial activity of potential probiotic lactic acid bacteria against Methicillin-Resistant Staphylococcus Aureus (MRSA)

Lactic acid bacteria (LAB)are the essential ingredients in probiotic foods, intestinal microflora, and dairy products able to cope up and exist in diverse environmental ranges. Samples were collected using sterile test tubes and transported to a laboratory in the icebox for further biochemical characterization. Gram test and catalase activity were examined after microscopically distinct colonies were sub-cultured to pure colonies based on standard gram and catalase test protocols. Subsequently, these bacteria were characterized for their ability to grow at various salt concentrations (5%,10%, and15%) and temperature gradients (15{degrees}C, 30{degrees}C, 45{degrees}C). Acid-tolerance was analyzed by growing the colonies in MRS broth adjusted to acidic pH (pH 3) and pH 7.2 (control). Bile tolerance of LAB isolates was assayed by growing in 0.3% bile-supplemented MRS agar. Bile salt hydrolase (BSH) activity was studied by growing 10 l of the prepared overnight culture on BSH screening media containing MRS agar plate supplemented with bile salts. The LAB isolates were checked for antimicrobial activity by agar well diffusion assay. All isolates found gram-positive, catalase-negative and non-motile, convex elevation and entire margin. All LAB isolates were able to grow at 5-10% Nacl concentration, whereas moderately grow at 10% concentration but rarely grow at 15% Nacl concentration. BCM2, BBM3 and BGM1 record the highest acidic resistance viability percentage 94.9%, 92.7%, and 91.8% respectively. BCM3 has the lowest acidic resistance with a viable percentage of 87.4%. BBM1 records the highest bile tolerance activity whereas BCM2 has the lowest bile tolerance. All isolates were found BSH positive. The study reveals LAB isolates showed a putative probiotic potential. Article highlightsLAB are the main ingredients of probiotic products commercially available in the market nowadays. To effectively functioning the host gastrointestinal tract probiotics, need to have certain criteria like acid and bile tolerance this study reveals O_LIAcid tolerance activity of LAB isolated from bovine milk C_LIO_LIBile tolerance activity of LAB isolated from bovine milk C_LIO_LIBile salt hydrolase (BSH) activity of LAB isolates C_LIO_LIAntimicrobial activity of LAB against MRSA C_LI

microbiology↗

bioRxiv2020

Effects of substituents on anticancer activity of thiosemicarbazone against MCF-7 human breast cancer cell line

Background/AimBreast cancer is one of the worlds leading cause of deaths in women. This study evaluated the in-vitro anticancer activity of different thiosemicarbazones (HacTSc, HSTsc, 3-MBTSc, 4-NBTSc and 4-HBTSc) against MCF-7 human breast cancer cell line and MCF-10 normal cell. Materials and MethodsThe ligands were prepared and characterized by UV vis, IR, 1H NMR. MTT assay was used to determine cell viability. Then data were analyzed using two-way ANOVA with Tukey post-hoc test. Result: The ligands have IC50 value ranging from 2.271{micro}g/ml to 7.081{micro}g/ml. Acetone thiosemicarbazone and 3-Methoxybenzaldehyde thiosemicarbazone, were identified as the most potent against MCF-7 breast cancer cells with IC50 value of 2.271{micro}g/ml and 2.743{micro}g/ml respectively. Whereas 4-Nitrobenzaldehyde thiosemicarbazone was the least potent. Also, the IC50 of the normal MCF-10 cell indicated their activity were selective. Conclusion: The activity of the ligands were dose, position and substituents dependent. Acetone thiosemicarbazone and 3-Methoxybenzaldehyde thiosemicarbazone are promising anticancer agents for further study.

cancer biology↗

bioRxiv2019

Cortical RORβ is required for layer 4 transcriptional identity and barrel integrity.

Retinoic Acid-Related Orphan Receptor Beta (ROR{beta}) is a transcription factor (TF) and marker of layer 4 (L4) neurons, which are distinctive both in transcriptional identity and the ability to form aggregates such as barrels in rodent somatosensory cortex. However, the relationship between transcriptional identity and L4 cytoarchitecture is largely unknown. We find ROR{beta} is required in the cortex for L4 aggregation into barrels and thalamocortical afferent (TCA) segregation. Interestingly, barrel organization also degrades with age. Loss of ROR{beta} delays excitatory input and disrupts gene expression and chromatin accessibility, with downregulation of L4 and upregulation of L5 genes, suggesting a shift in cellular identity. Expression and binding site accessibility change for many other TFs, including closure of neurodevelopmental TF binding sites and increased expression and binding capacity of activity-regulated TFs. Lastly, a putative target of ROR{beta}, Thsd7a, is downregulated without ROR{beta}, and Thsd7a knockout alone disrupts TCA organization in adult barrels.

neuroscience↗