Silencing CXCL16 alleviate neuroinflammation and M1 microglial polarization in mouse brain hemorrhage model and BV2 cell model through PI3K/AKT pathway.

Neuroinflammation and microglia polarization play pivotal roles in brain injury induced by intracerebral hemorrhage (ICH). Despite the well-established involvement of CXC motif chemokine ligand 16 (CXCL16) in regulating inflammatory responses across various diseases, its specific functions in the context of neuroinflammation and microglial polarization following ICH remain elusive. In this study, we investigated the impact of CXCL16 on neuroinflammation and microglia polarization using both mouse and cell models. Our findings revealed elevated CXCL16 expression in mice following ICH and in BV2 cells after lipopolysaccharide (LPS) stimulation. Specific silencing of CXCL16 using siRNA led to a reduction in the expression of neuroinflammatory factors, including IL-1ß and IL-6, as well as decreased expression of the M1 microglia marker iNOS. Simultaneously, it enhanced the expression of anti-inflammatory factors such as IL-10 and the M2 microglia marker Arg-1. These results were consistent across both mouse and cell models. Intriguingly, co-administration of the PI3K-specific agonist 740 Y-P with siRNA in LPS-stimulated cells reversed the effects of siRNA. In conclusion, silencing CXCL16 can positively alleviate neuroinflammation and M1 microglial polarization in BV2 inflammation models and ICH mice. Furthermore, in BV2 cells, this beneficial effect is mediated through the PI3K/Akt pathway. Inhibition of CXCL16 could be a novel approach for treating and diagnosing cerebral hemorrhage.

Application of peritoneal catheter via pneumoperitoneum puncturation in cerebral spinal fluid peritoneal shunt surgery / 中国中西医结合急救杂志

Objective To discuss the application value of the peritoneal catheter via pneumoperitoneum puncturation in cerebral spinal fluid (CSF) peritoneal shunt surgery. Methods The clinical data of 490 hydrocephalus patients admitted to Zhejiang Provincial Tongde Hospital from June 2002 to December 2016 were retrospectively analyzed, among them 147 cases accepted ventriculoperitoneal shunt (VPS) operation from June 2002 to January 2009 were assigned as a control group (open abdomenal catheterization group), and 343 cases accepted pneumoperitoneum puncturation from February 2009 to December 2016 were arranged as an observation group (abdominal paracentesis group). The patients in the abdominal paracentesis group were further subdivided into a VPS group (228 cases) and a lumboperitoneal shunt (LPS) group (115 group) according to different ways of catheterization. The clinical data such as infection, shunt obstruction (blockage), bleeding and other complications (such as insufficient or excessive drainage, bleeding, epilepsy, intestinal obstruction) 6 mouths after operation were collected in open catheterization group and abdominal paracentesis group, the difference of incidences of complication in each group were compared. Results The incidences of infection [10.20% (15/147) vs. 3.79% (13/343)], shunt obstruction [14.29% (21/147) vs. 7.58% (26/343)], other complications [23.13% (34/147) vs. 10.79% (37/343)] in open catheterization group were significantly higher than those in abdominal paracentesis group (all P < 0.05); the rate of shunt obstruction in VPS group was higher than that in LPS group [9.65% (22/228) vs. 3.48% (4/115), P < 0.05]. Conclusions Pneumoperitoneum puncturation is a simple, safe, minimally invasive technique to implant an abdominal cavity shunt catheter in CSF peritoneal shunt surgery, and it can effectively reduce the rates of infection and shunt blockage; LPS is more effective than VPS in reducing the incidence of the blockage by this paracentesis method.