Granulosa cell (GC) culture models mimicking the intrafollicular environment are limited. Such models have a great potential in reproductive toxicity studies. The buffalo, a monovulatory species like humans, could be a better model than polyovulatory rodents. Therefore, we targeted the development and characterization of three-dimensional (3D) culture systems for buffalo GCs. The GCs from small ovarian follicles (SF) maintained the CYP19 gene expression for 144 hr in a 2D culture system. Hence, GCs from SF were cultured directly in 3D using hanging drop and Poly-([2-hydroxyethyl methacrylate]) (polyHEMA) methods in the DMEM media containing 1 ng/ml FSH and 10 ng/ml IGF-1 for 144 hr. The expression profile of nine GC-specific transcripts; CYP19, TNFAIP6, AMH, PTI, NR4A1, FSHR, RUNX, LHR, and COX2/PTGS2; revealed that 3D-spheroids developed in hanging drop method maintained the GC phenotype of preovulatory follicles. Therefore, hanging drop method is a best method for culturing GCs to mimic the intrafollicular environment.

Human milk, the gold standard for optimal nourishment, controls the microbial composition of infants by either enhancing or limiting bacterial growth. The milk fat globule membrane has gained interest in gut-related functions and cognitive development. The membrane proteins can directly interact with probiotic bacteria, influencing their survival and adhesion through gastrointestinal transit, whereas membrane phospholipids increase the residence time of probiotic bacteria in the gut. The commensal bacteria in milk act as the initial inoculum in building up the gut colonization of an infant, whereas oligosaccharides promote proliferation of beneficial microorganisms. Interestingly, milk extracellular vesicles are also involved in influencing the microbiota composition but are not well-explored. This review highlights the contribution of different milk components in modulating the infant gut microbiota, particularly the fat globule membrane, and the complex interplay between host− and brain− gut microbiota signaling affecting infant and adult health positively.

Hanging drop (HD) three-dimensional (3D) culture model for buffalo granulosa cells (GC) was reported to mimic the preovulatory stage of ovarian follicles in our previous study.To further verify its reliability, the present study attempted a comparative transcriptome profile of buffalo GC freshly isolated from ovarian follicles (<8 mm diameter) (FC) and their cultures in normal culture dish (ND or 2D), polyHEMA coated dish (PH) and HD culture systems (3D). Out of 223 significantly (−log2 fold change: >3; p < .0005; false discovery rate [FDR]: <0.1) differentially expressed genes (SDEGs) among different culture systems, 137 were found unannotated, and 94, 29, and 66 were exclusively expressed in FC, PH, and HD, respectively. However, on eliminating the fixed points of p values and FDR from the entire raw data, only 11 genes related to long noncoding RNA, 12 genes related to luteinization, and 3 genes related to follicular maturation were exclusively expressed in FC, PH, and HD culture systems, respectively. The quantitative real time-PCR validation and the next generation sequencing data had more than 90% correlation. Bioinformatics analyses of the exclusively expressed SDEG revealed that the freshly aspirated GCs were a true representative of GCs from small follicles (<8 mm diameter), the GC spheroids under PH maintained mitochondrial function, and those cultured in HD system for 6 days simulated the inflammatory milieu required for ovulation. Therefore, the comparative transcriptome profile also reinforced that HD culture system is better in vitro culture method than the other methods analyzed in this study for buffalo GC.

bioavailable, naturally occurring molecule with strong anti-inflammatory and antioxidant activity, has been shown to (i) significantly attenuate pathological elevation of critical inflammatory cell signaling pathways (NF-kB), (ii) decrease the resulting elevated proinflammatory cytokine levels, (iii) reduce immune cell infiltration of the lung, and (iv) positively influence macrophage polarization in humans and animal models of disease. Corona represents crown-like spikes on the outer surface of the virus thus, it was named as a coronavirus. Coronaviruses are minute in size (65-125 nm in diameter) and contain a single-stranded RNA as a nucleic material, size ranging from 26 to 32kbs in length. The severe acute respiratory syndrome coronavirus (SARS-CoV), H5N1 influenza A, H1N1 2009 and Middle East respiratory syndrome coronavirus (MERS-CoV) cause acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) which leads to pulmonary failure and result in fatality. These viruses were thought to infect only animals until the world witnessed a severe acute respiratory syndrome (SARS) outbreak caused by SARS-CoV, in China. This virus was reported to be a member of the β group of coronaviruses. The novel virus was named as Wuhan coronavirus or 2019 novel coronavirus (2019-nCov) by the Chinese researchers.

Coronavirus disease (COVID-19) has spread rapidly across the world and has become a major health emergency in many countries around the globe. The virus was first detected in Wuhan, China, following an outbreak of pneumonia of unknown cause in December 2019, with most early cases of exposure to live animal market. On 31st December 2019, China announced the outbreak to the World Health Organization (WHO). On 30 th January 2020, WHO declared the latest outbreak of coronavirus as a public health emergency of international concern and then on March 11 th 2020 it was declared as a global pandemic. 1 COVID-19 is known to be caused by severe acute respiratory syndrome coronavirus-2 (SARS-COV-2) virus.

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