Rabbit Anti-Human CAT (Phospho-Tyr385) polyclonal antibody

Five isonitrogenous diets (50% crude protein) with 7%, 9%, 11%, 13%, and 15% lipid levels (named as L7, L9, L11, L13, and L15, respectively) were designed to evaluate the effects of dietary lipid levels on survival, growth performance, body composition, and antioxidant ability of the early juvenile Scylla paramamosain. Each diet was fed to three replicates of 28 crabs with initial weight 42.23 +/- 0.21 mg for 8 weeks. Crabs fed diet with lowest dietary lipid level (L7 group) obtained significantly lower survival than other crabs. The highest final body weight (FBW), weight gain (WG), specific growth rate (SGR), and molting frequency (MF) were observed in L11 group. Meanwhile, the highest mRNA expression of ecdysone receptor (EcR) also observed in L11 group. Besides, a positive correlation between body lipid contents and dietary lipid levels was observed in present study. But the mRNA expression of fatty acid synthetase (FAS) was relatively lower in L15 group. In the hepatopancreas, superoxide dismutase (SOD) activity significantly increased with increasing dietary lipid levels. On the contrary, the concentration of malondialdehyde (MDA) significantly decreased with elevating dietary lipid levels (except L15 group). Meanwhile, the lowest catalase (CAT) activity appeared in L7 group, but there was no statistical difference from other groups. Through the second order polynomial regression equation analysis of WG, the optimum dietary lipid level in the early juvenile S. paramamosain was 10.31%.

Background Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) caused the recent global COVID-19 outbreak, which led to a public health emergency. Entry of SARS-CoV-2 into human cells is dependent on the SARS-CoV receptor, angiotensin converting enzyme 2 (ACE2) receptor, and cathepsin. Cathepsin degrades the spike protein (S protein), which results in the entry of viral nucleic acid into the human host cell. Methods We explored the susceptibility of the central nervous system (CNS) to SARS-CoV-2 infection using single-cell transcriptome analysis of glioblastoma. Results The results showed that ACE2 expression is relatively high in endothelial cells (ECs), bone marrow mesenchymal stem cells (BMSCs), and neural precursor cells (NPCs). Cathepsin B (Cat B) and cathepsin (Cat L) were also strongly expressed in various cell clusters within the glioblastoma microenvironment. Immunofluorescence staining of glioma and normal brain tissue chips further confirmed that ACE2 expression co-localized with CD31, CD73, and nestin, which confirmed the susceptibility to SARS-CoV-2 of nervous system cells, including ECs, BMSCs, and NPCs, from clinical specimens. Conclusions These findings reveal the mechanism of SARS-CoV-2 neural invasion and suggest that special attention should be paid to SARS-CoV-2-infected patients with neural symptoms, especially those who suffered a glioma.