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The yellow stem borer (YSB) (Scirpophaga incertulas) (Pyralidae: Lepidoptera) is a conundrum pest of paddy in India. One of the best ways to overcome the attack of this pest is to control the initial stage of its life cycle by parasitoids. Per cent infestation of yellow stem borer and extent of parasitization was assessed in organic and conventional paddy fields at ICAR-Indian Agricultural Research Institute, New Delhi. Results revealed that stem borer infestation was more (0.59%) in conventional rice than organic rice (0.47%). Larval parasitoids, viz., Myosoma chinensis (Szepligeti), Trathala flavoorbitalis, Temelucha philippinensis and pupal parasitoids Xanthopimpla punctata emerged from both conventional and organic cropping systems. Myosoma chinensis was the most dominant among all the parasitoids recorded and all are new records to Delhi region. This study indicated that organic cultivation practices supported more to beneficial insects. Overall per cent parasitization under organic ecosystem was higher (34.6%) to conventional ecosystem (13.3%).

Colon cancer cells can migrate and metastasize by undergoing epithelial-to-mesenchymal transition (EMT). Mesenchymal stem cells (MSCs) are non-cancerous, multipotent adult stem cells, which can also migrate. In this study, we wanted to compare the biological, physical, and functional properties of these migratory cells. HT-29 and HCT-116, two human colon carcinoma cell lines, represent less aggressive and more aggressive cancer cells, respectively. MSCs were isolated from human bone marrow. After confirming the identity of all the cell types, they were evaluated for E-cadherin, β1-integrin, Vimentin, ZEB-1, β-catenin, and 18S rRNA using Q-PCR. MMP-2 and MMP-9 activity were evaluated using gelatin zymography. Functional tests like wound healing assay, migration assay, and invasion assay were also done. Biomechanical properties like cell stiffness and non-specific adhesion (between indenter probe and cell membrane) were evaluated through nanoindentation using atomic force microscopy (AFM). Expression of EMT and stem cell markers showed typical expression patterns for HT-29, HCT-116, and MSCs. Functional tests showed that MSCs migrated faster than malignant cells. MMP-2 and MMP-9 activity reinforced this behavior. Interestingly, the migration/invasion capacity of MSCs was comparable to aggressive HCT-116, and more than HT-29. MSCs also showed the maximum cell stiffness and non-specific cell-probe adhesions, followed by HCT116 and HT29 cells. Our findings indicate that the migratory properties of MSCs is comparable or even greater than that of cancer cells and despite their high migration potential, they also have the maximum stiffness.

Fetal neural stem cells (FNSCs) are present in the brain of human fetuses that differentiate into cells of neuronal and glial lineages. Difference in oxygen concentration between maternal and fetal circulation indicates that the developing fetus may be exposed to lower oxygen concentrations compared to adults. This physiological hypoxia may influence the growth and differentiation of the FNSCs. This study aimed to evaluate the effect of hypoxia on the differentiation potential of human FNSCs isolated from the sub-ventricular zone of aborted fetal brains (n=5). FNSCs were isolated, expanded, and characterized by Nestin and Sox2 expression, using immunocytochemistry and flowcytometry respectively. These FNSCs were exposed to 20% oxygen (normoxia) and 0.2% oxygen (hypoxia) concentrations for 48 hours, and hypoxia exposure (n=5) was evaluated by a panel of markers (CA9, PGK1 and VEGF). Whole human genome transcriptomic analyses (Genespring GX13) of FNSCs exposed to hypoxia (Agilent 4×44K human array slides), highlighted that genes associated with neurogenesis were getting enriched. The pathway analysis of these enriched genes (using Metacore) showed that WNT signaling played a role in determining the cell fate of FNSCs exposed to hypoxic environment. Microarray analyses was validated using neuronal and glial lineage commitment markers such as Ngn1, Ngn2, ASCL1, DCX, GFAP, Olig2 and Nkx2.2 using qPCR (n=9). This demonstrated upregulation of the neuronal commitment markers on hypoxia exposure, while no change was observed in astrocytic and oligodendrocyte lineage commitment markers. Increased expression of downstream targets of the WNT signaling pathway, TCF4 and ID2, by qPCR (n=9), indicated its involvement in mediating neuronal differentiation on exposure to hypoxia.

An analysis has been done to scrutinize the existence of dual solutions of the Casson nanofluid caused due to an exponential form of stretching surface which is situated in porous medium and second order velocity slip. An uniform magnetic field is considered in the transverse dirction of the flow. A suitable similarity transformation is employed to amend the model equations into solvable form and hence solved by adopting the MATLAB built-in bvp4c solver scheme. Results are discussed through both graphical mode and tabulations with respect to some novel flow parameters. The stability analysis has been studied and found two solutions, one is stable in nature and physically tractable. From the study, we have seen that the flow parameters associated with nanofluid enhance the heat transfer of the fluid. The Casson fluid parameter has also a power to increase temperature of the system.

Rheumatic diseases reach across continents with some similarities as well as unique challenges. The intersection between genetic factors, environmental exposures and socioeconomic factors, as well as challenges, with delays in access to subspecialty care and medications, manifest in different ways. By understanding both the challenges and successes in different countries, while also recognizing the significant diversity both within and across continents, unified strategies to improve rheumatic disease outcomes and decrease disparities among the most vulnerable groups can be developed and disseminated.

Astrocytes are the most abundant glial cells that play many critical roles in the central nervous system physiology including the uptake of excess glutamate from the synapse by Excitatory Amino Acid Transporters (EAATs). Among the EAATs, EAAT2 are predominantly functional, astrocyte-specific glutamate transporters in the forebrain. Hypoxic brain injury is a pathological phenomenon seen in various clinical conditions including stroke and neonatal hypoxic ischemic encephalopathy. Glutamate excitotoxicity is an important cause of neuronal cell death in disorders involving hypoxic brain injury. As findings from rodent models cannot always be reliably extrapolated to humans, we aimed to develop a homogenous population of primary human astrocytes to study the effect of hypoxic injury on astrocyte function, especially glutamate uptake. We successfully isolated, established and characterized cultures of human fetal neural stem cells (FNSCs) from aborted fetal brains. FNSCs were differentiated into astrocytes, and characterized by increased expression of the astrocyte markers, glial fibrillary acidic protein (GFAP), EAAT1 and EAAT2. A concomitant decrease in neural stem cell marker, Nestin, was observed. Differentiated astrocytes were exposed to various oxygen concentrations mimicking normoxia (20% and 6%), moderate and severe hypoxia (2% and 0.2% respectively). Interestingly, no change was observed in the expression of glutamate transporter, EAAT2 and glutamate uptake by astrocytes, even after exposure to hypoxia. Our novel model of human FNSC derived astrocytes exposed to hypoxic injury, establishes that astrocytes are able to maintain glutamate uptake even after exposure to severe hypoxia for 48 hours, and thus provides evidence for the neuroprotective role of astrocytes in hypoxic injury.