Effect of umbilical cord mesenchymal stem cells on immune microenvironment and vascular reconstruction in traumatic brain injury / 国际生物医学工程杂志

Objective To investigate the effects of umbilical cord mesenchymal stem cells (UCMSCs) on immune microenvironment and angiogenesis in patients with traumatic brain injury. Methods Cerebrospinal fluid (CSF) samples were divided into 4 groups, including normal group (n=6), traumatic brain injury group (n=6), traumatic brain injury+UCMSCs treatment group ( n=6 ) and craniocerebral trauma + conventional treatment group ( n=6 ) . The CSF samples were detected by liquid chromatography-mass spectrometry , and data were collected by data independent acquisition (DIA) technology. The differential proteins were screened by bioinformatics processing, and analyzed by Gene Ontology (GO) analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis. Results A total of 688 proteins were screened in CSF samples and reliably quantified. There were 38 differential proteins in the CSF of patients with traumatic brain injury after treatment with UCMSCs, including 20 up-regulated proteins and 18 down-regulated proteins. The results of GO analysis and KEGG analysis showed that the differential proteins were mainly immunoregulatory function-related proteins, angiogenesis-related proteins, and various connexins. Conclusions The main possible mechanism of UCMSCs in the treatment of traumatic brain injury is to regulate the stability of the immune microenvironment and to promote the regeneration and reconstruction of damaged brain tissue.

Research progress of CX3CL1-CX3CR1 and the pathogenesis of sepsis / 天津医药

Sepsis has poor prognosis, and its pathogenesis is not clear. Chemokine CX3CL1 (Fractalkine, FNK) has many functions such as chemotaxis, adhesion and mediate immune injury. CX3CR1 is the only receptor of CX3CL1 and participates in the development of sepsis. Here we review the structure, biological function and possible mechanism of CX3CL1 and CX3CR1 in the pathogenesis of sepsis.

Genetic polymorphism of rs9574 C/G of endothelial cell protein C receptor gene in Guangxi population / 临床与实验病理学杂志

Purpose To compare the difference of the genotype and allele of endothelial cell protein C receptor (EPCR)gene rs9574 C/G between Guangxi population and other ethnic groups.Methods The rs9574 C/G polymorphisms of EPCR in 130 cases of Guangxi population were detected by PCR and DNA sequencing.The distribution frequency of allele and genotype was compared with the other four ethnic groups (HapMap-CEU,HapMap-HCB,HapMap-JPT,HapMap-YRI),which was published by the human genome project.Results Three genotypes of CC,CT and TT were found in rs9574 C/G with the frequencies of 39.2％,46.2％,14.6％ respectively.the allele frequencies of C,T were 62.3％ and 37.7％.No significant difference was observed in the frequency of genotype and allele between male and female (P ＞ 0.05).There were significant differences in the genotype distribution among Guangxi population,HapMap-CEU and HapMap-YRI (P ＜ 0.05).Significant differences of allelic frequency were found among Guangxi population,HapMap-CEU,HapMap-JPT and HapMap-YRI.Condusion The polymorphisms of rs9574C/G in 3'-noncoding region of EPCR gene in Guangxi population were different in different regions and ethnic groups.

The surgery of giant symptomatic cavernous sinus aneurysms / 中华外科杂志

<p><b>OBJECTIVE</b>To evaluate the management and outcomes in patients with giant symptomatic cavernous sinus aneurysms who underwent aneurysms trapping with bypass, proximal carotid occlusion and aneurysms trapping.</p><p><b>METHODS</b>Twenty-three patients with giant symptomatic cavernous sinus aneurysms underwent surgery between February 2007 and March 2013, 3 cases were male and 20 cases were female patients, the age of the patients ranged between 24 and 68 years, mean age was 54.7 years. The pre-operative digital subtraction angiography (DSA) and ballon occlusion test (BOT) were performed to confirm the diagnosis and identify hemodynamic reserve with carotid occlusion, and the aneurysms trapping with bypass, aneurysms trapping and proximal occlusion of the internal carotid artery were performed according to BOT results. During the surgery, the neurophysiological monitoring and the intraoperative CT perfusion were used. The follow-up by DSA or CT angiography were made.</p><p><b>RESULTS</b>Seventeen patients underwent aneurysms trapping with bypass, 1 underwent aneurysms trapping and 5 underwent proximal occlusion of the internal carotid artery. After surgery, symptom improved in 4 cases, did not change in 10 cases, and new neural function deficit developed in 9 cases. The follow-up period were 3 months to 75 months. Two patients were lost. The Glasgow Outcome Scale of last follow-up were 5 in 19 patients, 3 in 1 patient and 1 in 1 patient.</p><p><b>CONCLUSIONS</b>The aneurysms trapping with bypass and proximal occlusion of the internal carotid artery are effective and reliable procedure for treatment of giant symptomatic cavernous sinus aneurysms in selected patients after evaluation of the pre-operative BOT, intra-operative neurophysiological monitoring and the intraoperative CT perfusion.</p>

Changes of coagulation in response to moderate hypothermia in patients with severe traumatic brain injury / 中华创伤杂志

Objective To determine the effect of moderate hypothermia on coagulation in patients with severe traumatic brain injury (sTBI) and investigate the clinical significance of thrombelastogram (TEG) monitoring.Methods Seventy-five patients with sTBI were randomly assigned to hypothermia group (conventional treatment + moderate hypothermia within 24 hours posttrauma,n =38) and control group (conventional treatment alone,n =38).TEG aided in monitoring coagulation function by measuring clot reaction time (R),clot formation time (K),clotting rate (α),maximal amplitude (MA),and percent fibrinolysis at 30 minutes after MA (LY30).Meantime,the intracranial pressure,vital signs,blood gas values,and blood electrolytes were also measured.Outcome was evaluated by using Glasgow outcome scale (GOS).Results The two groups were similar on admission with respect to R,K,α,MA,and LY30 (P ＞ 0.05),but the coagulation index in hypothermia group was significantly different from that in control group at days 1,2,3 and 7 posttreatment (P ＜ 0.05).Moreover,moderate hypothermia therapy demonstrated decrease of intraeranial pressure (P ＜ 0.01),with no severe complications,low mortality and improved outcome in comparison with control group.Conclusion Moderate hypothermia improves the hypercoagulability in patients with sTBI without increasing the risk of hyperfibrinolysis and protects brain tissue by decreasing intracranial pressure.