Proteins, sugars and esterase isoenzymes of An. anthropophagus and An. sinensis were compared by IEF and two dimensional gel electrophoresis.The results show that there are some differences in the electrophoretic patterns between An. anthropophagus and An. sinensis. The glycoprotein, lipidprotein, glycolipi-dprotein, protein, polysaccharide and esterase isosnzymES showed 10, O, 6, 14, 2 and 13 bands in An. anthropophagus; 10, l, 5, 16, 3 and 15 in An. sinensis. There exist 234 and 240 polypeptide spots in An. anthropophagus and in An. sinensis, respectively, alto-gether 27.8% of polypeptide spots being different.

Objective To observe the ultrastructural changes in the midgut epithelium of Ixodes sinensis after infesting rabbits immunized with {Mr 105 000} purified tick antigen. MethodsNew Zealand rabbits were inoculated with {Mr 105 000} purified antigen by means of mutiple intradermal injection in foot pad, groin and back. Each immunized rabbit was infested by 30 female Ixodes sinensis. At 24 hours, 48 hours, 72 hours, 5 days and 8 days after infestation, three Ixodes sinensis in each group were observed for ultrastructural changes in the epithelium of their midgut. Results Histological examinations showed that with the time going, digestive cells of the ticks after infesting hosts became more and larger with dense and regularly arranged microvilli, enriched organella, distinct unit_membrane structure, and the appearance of tubli, small vacuole, numerous lipid droplets and hematin granules. These cells also developed a highly infolded basal lamina, forming a labyrinth system. The digestive cells of immunized group were however greatly damaged, whose number and volume were significantly different from control groups. From 24 to 48 hours after infestation, the midgut epithelium of Ixodes sinensis showed pathological changes with the basal lamina becoming thinner, looser and broken; digestive cells damaged and vacuolated; microvilli decreased, shortened and irregularly arranged; the mitochondria swollen and its crests reduced, shortened and even with myeloid changes; the rough endoplasmic reticulum dilated; lipid droplets and hematin granules decreased; phagocytic and pinocytic activity weakened; and basal labyrinth system vacuolated. From 72 hours to 8 days after infestation, cells were severely damaged, organella were denatured and necrotic, nuclei showed pyknosis and cells lysed. Conclusion The rabbits immunized with {Mr 105 000} purified ixodic protein have acquired the adoptive immunity against Ixodes sinensis; in the anti_tick immunity described above, the midgut of Ixodes sinensis is the major affected site.

Objective To investigate the role of nicorandil pretreatment on protecting myocardium after coronary microembolization (CME) and on the PDCD4/NF-κB/TNF-α signaling pathway in miniature pigs. Methods Fifteen Bama miniature pigs were randomly(random number) divided into the sham operation group (sham group), microembolization group (CME group) and CME plus nicorandil group, with 5 pigs in each group. The CME model was constructed by injecting polyethylene microspheres via microcatheter into the left anterior descending artery, and pigs in the sham group were injected with the same amount of saline. Pigs in the CME plus nicorandil group were injected intravenously with nicorandil (150 μg/kg) via ear vein 30 min before CME. Cardiac function indexes were measured using cardiac ultrasonography. The expression of PDCD4 and TNF-α mRNA in myocardium were detected by fluorescence quantitative PCR, and the protein expression of PDCD4 and TNF-α in myocardium were detected by Western blotting. NF-κB activation was evaluated by electrophoretic mobility shift assay. Results (1) Cardiac function was significantly lower and the level of serum cTnI was significantly higher in the CME group compared with the sham group. CME reduced myocardial systolic dysfunction and left ventricular dilatation. The CME plus nicorandil group showed improved CME-induced cardiac function and reduced serum cTnI level when compared with the CME Group (P < 0.05). (2) Compared with the CME group, the CME plus nicorandil group showed lower PDCD4 and TNF-α expression and NF-κB activity as well as improved cardiac function (P < 0.05). Conclusions The pretreatment of nicorandil effectively reduced the myocardial damage caused by CME, mainly through inhibiting the PDCD4/NF-κB/TNF-α pathway in cardiomyocytes.

Objective To investigate the characteristics of epidemic and genotype/subtype distribution of hepatitis C virus (HCV) among entry travelers at Tengchong port,to provide references for HCV prophylaxis and treatment.Methods A total of 54 serum samples were collected from anti-HCV positive travelers at Tengchong port from June 2009 to June 2016.HCV NS5B gene was amplified using reverse transcription polyonerase chain reation (RT-PCR) and subsequently sequenced.Based on the obtained sequences and retrieved reference sequences,phylogenetic analysis was conducted to determine HCV genotype/subtype.Results HCV infection rate among entry travelers at Tengchong ports was 0.45 ％ (54/12 059).Forty five samples were successfully genotyped.Phylogenetically,HCV genotype 3b was revealed to be the predominant subtype (28.89 ％,13/45) in this population,followed by genotype 6n (20.0％,9/45),genotype 1b (17.78％,8/45),genotype 3a (13.33％,6/45),genotype 2a (11.11％,5/45),genotype 1a (2.22％,1/45) and genotype 6a (2.22％,1/45).The major genotype in Myanmar travelers was genotype 6,while in Chinese population,genotype 1 predominated.Genotype 6 in the population showed close phylogenetic relationship with strains prevalent in China and Southeast Asia.Genotype 3 was closely clustered with strains prevalent in China.Conclusions The distribution of HCV genotypes among entry travelers at Tengchong port is impacted by HCV epidemic strains both in Yunnan province and neighboring regions.This population serves as a transmitting media which may influence the epidemiological characteristics of HCV in Tengchong and neighboring areas.

The condition of patients with severe traumatic brain injury (sTBI) complicated by corona virus 2019 disease (COVID-19) is complex. sTBI can significantly increase the probability of COVID-19 developing into severe or critical stage, while COVID-19 can also increase the surgical risk of sTBI and the severity of postoperative lung lesions. There are many contradictions in the treatment process, which brings difficulties to the clinical treatment of such patients. Up to now, there are few clinical studies and therapeutic norms relevant to sTBI complicated by COVID-19. In order to standardize the clinical treatment of such patients, Critical Care Medicine Branch of China International Exchange and Promotive Association for Medical and Healthcare and Editorial Board of Chinese Journal of Trauma organized relevant experts to formulate the Chinese expert consensus on clinical treatment of adult patients with severe traumatic brain injury complicated by corona virus infection 2019 ( version 2023) based on the joint prevention and control mechanism scheme of the State Council and domestic and foreign literatures on sTBI and COVID-19 in the past 3 years of the international epidemic. Fifteen recommendations focused on emergency treatment, emergency surgery and comprehensive management were put forward to provide a guidance for the diagnosis and treatment of sTBI complicated by COVID-19.