Objective To study the effect of methyl mercury on the development of rat offspring. Methods The male Wistar rats were divided into four groups randomly, each group was administrated methyl mercury by gavage every two days for two months, then, the rats were mated with healthy female rats. The development, growth and behaviors of offspring were investigated. Results Compared with the control, the body weights of offspring in groups of 1.170 mg/kg and 0.580 mg/kg were less and the development was tardy. The indexes that can reflect the level of development showed that the behaviors of offspring in experimental groups were damaged. Conclusion The male rats exposed to methyl mercury may produce an adverse effect on the development, growth and behaviors of their offspring.

Adult ; Aneurysm, Dissecting ; etiology ; Coronary Aneurysm ; etiology ; Humans ; Male ; Myocardial Infarction ; etiology ; Wounds and Injuries ; complications

Both sides of the picornavirus genome have 5'-untranslated region (5'UTR) and 3'- untranslated region (3'UTR). This study demontrated that both the 5'-and 3'-UTR can form complex structures, such as stem-loop, clover and pseudoknot structure, These structures play an important role in the regulaton of the replication and translation of the viruses. This article reviewed the progress of research on the structure and function of picornavirus' 3'-UTR over recent years.
3' Untranslated Regions ; Animals ; Humans ; Nucleic Acid Conformation ; Picornaviridae ; chemistry ; genetics ; metabolism ; Picornaviridae Infections ; virology ; RNA, Viral ; chemistry ; genetics ; metabolism

Objective: To investigate the characteristics of dead HIV/AIDS cases within 1 year after confirmatory testing in Jingzhou City, Hubei Province from 1996 to 2021, so as to provide the evidence for facilitating early identification and treatment of AIDS. Methods: The basic and follow-up data of HIV/AIDS cases were retrieved from the HIV/AIDS Comprehensive Response Information System of Chinese Disease Prevention and Control Information System, and mortality density and its trend were evaluated within 1 year after confirmatory testing. The factors affecting death within 1 year after confirmatory testing were identified using a Cox proportional hazards model, and the demographics, detection, treatment and cause of death were analyzed among dead HIV/AIDS cases within 1 year after confirmatory testing. Results: A total of 3 304 HIV/AIDS cases were included, with 508 deaths within 1 year after confirmatory testing. The overall mortality density was 17.43 per 100 person-years, and the mortality density appeared a tendency towards a reduction from 1996 to 2021 (χ2trend=21.053, P<0.001). Of all dead HIV/AIDS cases within 1 year after confirmatory testing, 77.76% were men, 67.72% at ages of 45 years and older, 83.86% with transmission by heterosexual contact, 83.66% identified in medical institutions, 62.20% without antiretroviral therapy, and 47.83% without detection of CD4+T cell count. Mortality that was not associated with AIDS was the predominant cause of death among dead HIV/AIDS cases within 1 year after confirmatory testing (58.86%). Age of 30 years and older (HR: 1.781-4.644, 95%CI: 1.073-7.784), identification in medical institutions (HR=2.130, 95%CI: 1.306-4.474), initial CD4+T cell count of <200 cells/μL (HR: 2.649-12.879, 95%CI: 1.669-19.189), no antiretroviral therapy (HR=7.945, 95%CI: 5.743-10.993) and initiation of antiretroviral therapy 4 to 12 months after confirmatory testing (HR=1.636, 95%CI: 1.005-2.662) resulted in a higher risk of mortality within 1 year after confirmatory testing. Conclusions The mortality density appeared a tendency towards a reduction among cases within 1 year after confirmatory testing in Jingzhou City from 1996 to 2021. Mortality within 1 year after confirmatory testing was associated with advanced age, heterosexual contact transmission, identification in medical institutions, low CD4+T cell counts, and delay or absence of antiretroviral therapy.

Background The visual system of animal have to optimally adjust in various environmental conditions in order to obtain stable and effective visual funetion.However,the color vision system of animals which encounter uncertainty of spectral signals should be plastic.Whether the densities of various cones and expression of opsins change with long-time spectral deprivation is unclear.Objective This study was to investigate the changes of cone density as well as the expression of corresponding opsin and mRNA following the long-term illumination of monochromatic light.Methods Thirty 3-day-old guinea pigs were randomized into 3 groups and exposed tO the 530 nm green light,400 nm purple light and white light for consecutive 8 weeks respectively.The flat-mounted retinal sample was prepared and divided into dorsal zone,ventral zone and mixed zone anatomically according to the distribution of difierent light-sensitive cone.The changes in density of cone cells sensitivited to different colored light were detected by single-1abel or double-label immunocytochemistry.The levels of opsin and its mRNA were determined using Western-blot and real-time PCR respectively.Results The density of green-sensitivity cones was significantly different in the dorsal zone of retina among green light group,purple light group and white light group (F=234.28,P<0.01).Compared with white light group,the density of green-sensitive cones in dorsal retina of green light group was obviously higher but that of purple light group wag evidently lower(q=389.68,P<0.01；q=67.11,P<0.01).No significant difference was found in the density of purple-sensitive cones in the ventral zone of retina among green light group,purple light group and white light group(F=3.14,P>0.05).The density of coexpression of the mixed cone cells was increased in green light group(q=157.55,P<0.01)but decreased in purple light roup (q=254.85,P<0.01)in comparison with white light group.The expression levels of green-opsin and green-opsin mRNA in green light group was significantly elevated(q=184.45,P<0.01；q=4.71,P<0.05),but those of purple light group were evidently declined(q=5.87,P<0.05；q=346.66,P<0.01)in comparison with white light group.There was no statistically significant differences were found in the expression of purple-opsin and its mRNA among all the groups(F=1.24,P>0.05；F=3.27,P>0.05).Conclusion After the exposure of long-time monochromatic light illumination,monochromatic cones density and its opsin in guinea pig occur the corresponding alteration to gain good spatial vision as a compensatory reaction.These outcomes imply that there is some plasticity during the development of color vision.The increase of green-sensitive cones might be from the differentiation of coexpression cones in transition region.

Abstract: Objective　To understand the kdr (knockdown resistance, kdr) gene mutation of the voltage-gated sodium channel (VGSC) of Anopheles sinensis in Yunnan Province. Methods　From 2018 to 2019, mosquitoes were collected in Luoping County, Suijiang County, Tengchong City, Yingjiang County, Yuanjiang County and Mengla County in Yunnan Province. The collected mosquitoes were morphologically identified as Anopheles sinensis and genomic DNA was extracted by kits. The DNA templates were sequenced after PCR amplification and the sequencing results were identify as Anopheles sinensis by homology alignment in NCBI. After the ⅡS5 and ⅡS6 fragments of the sodium channels in Anopheles sinensis were amplified and sequenced, the sequencing results were multiple aligned by DNAMAN software, and the mutations were analyzed one by one with BioEdit software to determine the kdr allele types and genotypes, and the frequencies were calculated. Results This survey amplified 287 sequences, and the sequence maps showed that 1014 loci had three alleles, including wild type TTG/L (89.20%), mutant type TTT/F (9.76%) and TCG/S (1.04%). Five genotypes: homozygous wildtype L/L (85.02%), homozygous mutant F/F (6.27%) and S/S (0.35%), heterozygous mutant L/F (6.97%) and L/S (1.39%). The wild type allele TTG/L was the main allele in six sampling sites except Suijiang County. The frequency of wild type allele in Tengchong City was the highest (100.00%). That is, no mutation was detected, while the rest of counties occurred different degrees of mutation at 1014 loci. The frequency of mutant allele in Suijiang County was the highest, reaching 55.68%. Luoping County, Mengla County and Suijiang County had two mutant types. Yingjiang County and Yuanjiang County had one heterozygous mutant L/F. Conclusion　Wild type L1014 (TTG/L) is still dominant in most areas of Yunnan Province. The kdr mutation type is mainly L1014F, followed by L1014S, and the mutation frequency is lower than that in central provinces of China.

Heuristic teaching is propitious to cultivating students' ideation. We have used different heuristic modes for example problems, stories, contrast, associationin and so on to cultivate medical students' ideation in pathobiology and immunology teaching and acquired good effect.

Objective: To investigate the trend in incidence of hepatitis C in Jingzhou City, Hubei Province from 2008 to 2022, and to examine the age-period-cohort effect, so as to provide the basis for the formulation of hepatitis C prevention strategies. Methods: Demographic data and incidence data of hepatitis C in Jingzhou City from 2008 to 2022 were collected through the Chinese Disease Prevention and Control Information System, and the trend in incidence of hepatitis C was analyzed using average annual percent change (AAPC) and annual percent change (APC). The effects of age, period and cohort on the incidence of hepatitis C were examined with an age-period-cohort model. Results: The average annual incidence of hepatitis C in Jingzhou City from 2008 and 2022 was 20.26/105, with a male incidence of 20.04/105 and a female incidence of 20.47/105. The incidence of hepatitis C initially rose and then fell (AAPC=5.375%, P<0.05), with a rising trend from 2008 to 2018 (APC=13.370%, P<0.05) and a decreasing trend from 2018 to 2022 (APC=-12.231%, P<0.05). The incidence of hepatitis C appeared a tendency towards a rise with age, and the 80-84 age group had the highest risk (RR=11.420, 95%CI: 7.631-17.090) in relative to the 45-49 age group. The incidence of hepatitis C appeared a tendency towards a rise followed by a decline with time, and an increased risk of hepatitis C was seen from 2013 to 2017 (RR=1.393, 95%CI: 1.272-1.525) and a decreased risk was seen from 2018 to 2022 (RR=1.237, 95%CI: 1.072-1.428) in relative to the period from 2008 to 2012. The incidence of hepatitis C appeared a tendency towards a rise followed by a decline with the cohort, and a higher risk was found in the 1965-1984 cohort (all RR>1.300) in relative to the 1960-1964 cohort. The incidence of hepatitis C, the age and period effects in men and women, and the cohort effects in men were consistent with the whole population. In addition to the 1965-1984 cohort, a higher risk was found in the 2000-2014 cohort in women (all RR>1.250). Conclusions From 2008 to 2022, the incidence of hepatitis C in Jingzhou City experienced a notable rise and subsequent decline. The incidence of hepatitis C increased with age, with higher risks seen among middle-aged and elderly people.

In order to provide a scientific basis for the establishment of a Daphnes Cortex medicinal material fungus library and the screening of endophytic fungi that promote the growth of Daphnes Cortex and increase the content of daphnetin, we used Illumina high-throughput testing technology to analyze 9 Daphnes Cortex samples from Gansu and Shanxi provinces. A total of 632 766 valid sequences were obtained, including 348 OTUs, 4 phyla, 20 classes, 48 orders, 108 families, 154 genera, and 208 species. The sum of the first 3 fungal genera account for more than 65% of the total abundance, with the highest reaching 98.4%. Alternaria and Phoma are the main genuses of Daphne giraldii Nitsche, and Altemaria is the dominant genus. The endophytic fungi community of Daphnes Cortex is rich in diversity, and the order of fungal diversity in different producing areas is: Gangu County > Wutai County > Tanchang County.

ObjectiveTo establish an animal model of intracerebral hemorrhage (ICH) in rat and to observe the changes in behavior, brain edema and tissue structure during absorption of the hematoma.MethodsAn animal model of ICH was established by stereotactically infusing 100 μl (the first time 20 μl, the second time 40 μl, the third time 40 μl) of autologous caudal artery blood into caudate nucleus in the rats. The behavior of rats with ICH was assessed by Bederson score, beam-walking test, bilateral forepaws grasp and measurement of forelimb placing. The brain edema and the change in histology were observed.ResultsThe successful ratio of this model was 75%. There were significant behavioral changes and brain edema at 6 h after the ICH in rats of the experimental group compared to those of the control group. The worse behavioral changes and brain edema was at 48～72 h after hemorrhage. In the earlier period, the nerve cells were swelling. A lot of glial cells appeared around the hematoma in the late period.ConclusionThis ICH model is reproducible, and the obvious behavioral change and histological changes are similar to clinical patient with ICH.