Rabbit Anti-Human RBM3 (a.a. 1-157) Polyclonal antibody

We encountered several cases concerning to ischemic and hypoxic deaths at routine autopsy cases. These victims were individuals who died due to suicidal hanging, autoerotic accidental hanging, self-ligature strangulation, manual strangulation, strangulation by a rope, accidental and suicidal drowning, anaphylaxis shock, and asphyxia by food aspiration. Theiragonal duration and postmortem interval were different, that is, agonal duration distributed from direct death to 4days and postmortem interval was from 12hours to 40 days, respectively. We examined the damaging degree of the granular cell layer in the each cerebellum using an application of Photshop andexpression pattern of antigens in the cerebellums by immunohistochemstry using anti CIRBP, RBM3, HIF-1, AIF1, SIRT1, Ngb, HSP 70, cFos, p53 and CCC9 antibodies. The results indicate the co-relationship between damaging of the granular cells and agonal duration, andshowed that expression pattern of antigens may be relate with agonal duration, although it was not significant. The antigens expressed during agonal duration might be kept even in postmortem interval. In a special case in which an individual was killed and buried for 40 days under ground after being strangulated, the antigens related to stress and ischemic signaling pathway such as HSP70, CCC9, CIRBP, RBM3 and SIRT 1 were detectable in the molecular layer and dentate nucleus of the cerebellum. The co-relationship between the damaging of granular cells and agonal duration may be more reliable compared with those of Purkinje cells and agonal duration. The results obtained in this study indicate that the damaging of granular cells is useful tool to estimate agonal duration, and postmortem humanbrain tissue may be utilizable for diagnosis and examination of brain diseases. The results obtained in this study indicated that CIRBP and RBM3 were hypoxic or ischemic related antigens and not the cold inducible antigens.

Neural stem cells (NSCs) reside physiologically in a hypoxic niche to maintain self-renewal and multipotency. Whereas mild hypoxia is known to promote NSC proliferation, severe hypoxia in pathological conditions exerts the reverse effect. The multi-functional RNA-binding protein RBM3 is abundant in NSCs and can be regulated by hypoxic exposure. Although RBM3 has been shown to accelerate cell growth in many cell types, whether and how it affects NSC proliferation in hypoxic environment remains largely unknown. In this study, we tested how RBM3 regulates cell proliferation under hypoxia in C17.2 mouse NSC cell line and in primary mouse NSCs from both the forebrain of postnatal day 0 (P0) mice and the subgranular zone (SGZ) of adult mice. Our results demonstrated that RBM3 expression was highly sensitive to hypoxia, and NSCs were arrested in G0/G1 phase by 5, 2.5, and 1% O-2 treatment. When we overexpressed RBM3, hypoxia-induced cell cycle arrest in G0/G1 phase was relieved and more cell transit into S phase was observed. Furthermore, cell viability under hypoxia was also increased by RBM3. In contrast, in RBM3-depleted primary NSCs, less BrdU-incorporated cells were detected, indicating exacerbated cell cycle arrest in G1 to S phase transition. Instead, overexpressed RBM3 significantly increased proliferation ratio in primary NSCs. Our findings indicate RBM3 as a potential target to maintain the proliferation capacity of NSCs under hypoxia, which can be important in NSC-based therapies of acute brain injury and chronic neurodegenerative diseases.