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Objective To investigate the clinical features of patients with acute ST-segment elevation myocardial infarction (STEMI) comorbid with diabetes mellitus (DM) and to analyze the prognosis within 12 months after primary percutaneous coronary intervention (pre-PCI). Methods A total of 375 STEMI patients were divided into the diabetes group (n=140) and the normal blood glucose group(n=235) according to whether they met the diagnostic criteria of DH. The clinical data,characteristics of coronary artery lesions,type of stent implant,rate of coronary slow flow or no-reflow after pre-PCI, and the prognosis within 12 months after PCI of the two groups were investigated.Results Patient in the diabetes group presented with higher mean age ,higher comorbid rates of hypertension , hyperlipidemia and heart function of Killip class Ш and above than patients in the normal blood glucose group (all P<0.05). patients in the diabetes group had higher rates of slow reflow /no-reflow after PCI(12.9% vs.5.5%,P=0.013),higher percentages of 3-ressel disease(40.7% vs. 28.9%,P=0.019)and lef t main lesions(13.6% vs. 7.2%,P=0.044). The in-hospital mortality rates(6.4% vs.1.7%,P=0.020),revascularization rates within 12 months(7.9% vs.0.9%,P=0.001)and incidence of heart failure(7.9% vs. 2.6%,P=0.017)were all higher in the diabetes group. Conclusions STEMI patients comorbid with DM were relatively older, had higher comorbidities of hypertension,hyperlipidemia, three-vessel disease, left main coronary lesions and higher mortality during hospitalization. No significant increase in cardiac death and recurrent myocardial infarction were deserved during the follow-up period. These patients may benefit more from early intervention.
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Objective To discuss the relationship between human leukocyte antigen (HLA) gene heredity and morbidity of cerebral infarction by a random survey on the allele expression of HLA-A, B and DRB1 seats of patients with cerebral infarction. Methods The genotypes of HLA-A, B and DRB1 alleles in 94 patients with cerebral infarction and 122 healthy blood donors were detected by polymerase chain reaction-sequencing based typing (PCR-SBT) method. Results Sixteen alleles in HLA -A locus,32 alleles in HLA -B locus and 25 alleles in HLA -DRB1 locus expressed themselves in these patients with cerebral infarction. The gene frequency of HLA -A*1102 in patients was lower than that in healthy controls, and negative association was found between HLA -A* 1102 allele and cerebral infarction (RR=0.06,P=0.019). Conclusion The research reveals susceptibility association of HLA -A*1102 with patients having cerebral infarction, displaying close genetic immunity correlation between HLA alleles and pathogenesis of cerebral infarction. So, the research in this paper is useful in the clinical prediction of this disease.
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Objective To investigate the modulatory effect of substance P (SP) on proton-gated current in the membrane of rat trgeminal ganglion (TG) neurons and its underlying mechanism. Methods Neurons were isolated mechanically and enzymatically from TG of rat. Whole-cell patch clamp technique was used for recording the proton-gated current in freshly isolated neurons. Results Proton-gated currents recorded from rat TG neurons could be classified into 4 distinct types: T-type, S-type, B-type and O-type in the present study. Co-application of SP and proton potentiated S-type proton-gated currents in a concentration-dependent manner, and the potentiation was not blocked by SP receptor antagonist, GR82334; co-application of SP and proton potentiated B-type proton-gated currents, and GR82334 and intracellular dialysis of GDP-β-S blocked the potentiation of SP. Pre-application of SP inhibited B-type proton-gated current, especially the transient component. The inhibition could not be reversed by pretreatment wit-h GR82334. Conclusions The mechanisms of modulation of proton-gated current by SP is associated with the difference of their makeup of subunits of acid-sensing ion channels (ASICs), and there may be an allosteric position of SP in the outside framework of ASICs in neuronal membrane.
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<p><b>OBJECTIVE</b>To analyze the polymorphism of HLA-A, B and DR alleles of Duchenne muscular dystrophy (DMD) patients in Han nationality of South China and to discuss the role of immune and genetic factors in the pathogenesis of DMD and muscular fiber necrosis.</p><p><b>METHODS</b>Polymerase chain reaction-reverse sequence specific oligonucleotide (PCR-RSSO) and National Marrow Donor Program (NMDP) were used to analyze the polymorphism of HLA-A,B and DR alleles of 113 DMD patients and 406 normal controls in Han nationality of South China.</p><p><b>RESULTS</b>The frequencies of HLA-A24, A30 alleles in DMD group were 11.25% and 5.46% respectively, indicating notable difference (P=0.001, < 0.01) from 22.16% and 0.87% of control group; the frequencies of HLA-B13, B15, B61 and B62 alleles in DMD group were 12.26%, 16.92%, 0.44% and 0.44%, indicating a notable difference (P=0.016, < 0.01, 0.001) from 6.76%, 1.49%, 4.79% and 5.05% of control group; the frequencies of HLA-DR04, DR07, DR12 alleles in DMD group were 17.45%, 6.40% and 19.62%, indicating a notable difference (P=0.018, < 0.01, 0.012) from 10.67%, 2.24% and 11.92% of control group.</p><p><b>CONCLUSION</b>There are significant differences in the HLA gene frequencies between DMD patients and normal controls. These results suggest that HLA genotype relates to the muscular necrosis and the pathogenesis of DMD.</p>