Astrocytes(AS)are the most abundant glial cells in the central nervous system and are involved in many physiological and pathological processes in the nervous system.Alterations in their phenotype are particularly important for the health of the CNS.Epigenetic mechanisms,including DNA methylation,histone modification,non-coding RNA regulation,and chromatin remodeling,are closely linked to alterations in AS proliferation,differentiation,inflammation,and other phenotypic features,but how these mechanisms function needs to be explored and summarized.By reviewing the recent advances in the role of epigenetic mechanisms in AS under various physiological and pathological states,we aim to provide new ideas for the understanding and treatment of related diseases.

Objective To determine the epidemiological characteristics of measles in Jinshan District of Shanghai in 2002‒2019. Methods This study was a secondary data analysis using measles surveillance system and epidemiological case reports in Jinshan District from January 2002 through December 2019. Temporal characteristics of the disease onset was determined by a concentration method. ArcGis 10.4 and SaTScan 9.6 software were used for spatiotemporal clustering scanning analysis. Results From 2002 through 2019， a total of 289 cases of measles were reported in Jinshan District， Shanghai， with an average annual incidence of 2.24 per 10⁵. The annual incidence fluctuated from 0 to 11.27 per 10⁵. The highest incidence was recorded in 2005 （11.27 per 10⁵）， followed by a decline； however， there was a rebound in 2008 （5.26 per 10⁵） and 2015 （3.30 per 10⁵）. The concentration M was determined to be 0.62， showing a clear seasonality concentrated in February to May. The spatiotemporal scan found that spatial and temporal clusters were more likely to occur in the areas with higher population density such as Zhujing Town and Shihua Community and between 2002 and 2009. The majority of measles cases were infants and children under the age of 1 and adults aged 20‒39 years. Approximately 66.78% of measles cases reported unknown vaccination history. In addition， in children aged 8 month to 4 years， the vaccination rate of measles-containing vaccines in the domestic migrants was much lower than the local residents （χ²=4.44， P=0.035）. Conclusion The incidence of measles in Jinshan District presents a downward trend. The population affected has a "two-way displacement"， which is concentrated in the more populated areas. It is necessary to strengthen measles surveillance and implement supplementary immunization programs with measles-containing vaccines for at-risk populations.

Objective:To analyze the risk factors and human papillomavirus (HPV) genotypes distribution in patients with condyloma acuminatum (CA) in two regions of Shandong province.Methods:From August 2019 to December 2020, an anonymous questionnaire survey of CA patients was conducted in three hospitals in Jinan City and Jining City, Shandong Province, and samples were collected for HPV typing. Multivariate binary logistic regression was used to analyze the risk factors of CA recurrence. HPV typing was detected by PCR-reverse dot blot hybridization.Results:A total of 653 questionnaires were collected, and the valid questionnaires accounted for 98.77% (645/653). Recurrence of the disease occurred in 174 patients, with a recurrence rate of 26.98%. Univariate analysis showed that there were statistically significant differences in the distribution of CA recurrence among residence time at current address, sexual frequency, genitalia cleaning, and knowledge of preventing HPV infection ( P<0.05). Multivariate binary logistic regression showed that knowing how to prevent HPV infection was a significant factor that influences CA recurrence. A total of 428 patients underwent HPV typing, and the positive detection rate of HPV was 98.60% (422/428). The top three positive rates were HPV6 (57.58%), HPV11 (36.49%) and HPV16 (11.37%). The main type of infection was low-risk HPV, accounting for 51.42% (217/422). Conclusions:CA patients have the phenomenon of "separation of knowledge and action" , so it is necessary to strengthen health education and behavioral intervention, guide the population to correctly treat sexual behavior, and improve self-prevention awareness and risk awareness.

Objective To investigate the immunization coverage of oral live attenuated rotavirus vaccines and its influencing factors among children under 5 years old in Jinshan District of Shanghai in order to provide references for optimizing vaccination management in this area. Methods A cross-sectional study was conducted in 6 community vaccination clinics randomly selected from 12 vaccination clinics in Jinshan District. In each selected clinic,145 children under 5 years old were continuously recruited. Information on immunization status,demographics of children,family socioeconomic status and parents′knowledge of vacci-nation were collected through questionnaire interview. Logistic regression was used to analyze factors influen-cing immunization status by using SPSS22.0. Results Among the 863 participating children, the immuni-zation coverage rate of oral live attenuated rotavirus vaccines was 61.07%. Multivariate analysis revealed that children having an urban registration status (OR=2.21),better family income (OR=1.47) and par-ents with high recognition of rotavirus diarrhea (OR=8.56) and stronger intention to following "doctor′s suggestions" (OR=1.96) were more likely to accept oral live attenuated rotavirus vaccines, while those from families with a medical professional were less likely to be vaccinated (OR=0.57). Conclusion The immunization coverage rate of oral live attenuated rotavirus vaccines among children in Jinshan District were influenced by various factors such as children′s household registration status, household income, parents′knowledge regarding vaccination and doctors′suggestions. Health education on immunization should be strengthened and tailor-made to improve the coverage of oral rotavirus vaccination.

Objective To explore the risk factors of postoperative activities of daily living in elderly patients after hip fracture. Methods By convenience sampling,from October 2013 to June 2015,150 elderly patients having undergone surgery after hip fracture were selected,with data of 141 cases finally collected. Gender,age,underlying diseases,surgical procedures,postoperative complications,ambulation time,whether walking with aids,family caregivers and reexamination conditions were recorded for evaluation of the patients about their activities of daily living half a year after the surgery. Mean comparison and chi-square test were used for univariate analysis about the above factors and Logistic regression analysis was used to identify possible risk factors. Results It was shown in univariate analysis that recovery of postoperative activities of daily living was influenced by age,surgical procedures,postoperative complications,ambulation time,walking aids,etc. (P< 0.05);it was shown in multivariate logistic regression that age (OR=1.065,95%CI:1.010-1.124, P=0.020),surgical procedures (OR=2.900,95%CI:1.200-7.008,P=0.018),postoperative complications (OR=6.366,95%CI:2.592-15.632,P< 0.001),ambulation time (OR=2.684,95%CI:1.133-6.359,P=0.025) and walking aids (OR=5.796,95%CI:1.542-21.780,P=0.009) were risk factors of postoperative daily living ability in elderly patients after hip fracture. Conclusions Old age,developing internal fixation surgery after incision,postoperative complications, walking more than 3 months after operation or walking without aids affect postoperative activities of daily living in elderly patients after hip fracture,thus affecting their quality of life, which makes it necessary for nursing staff to focus on risk factors for positive prevention and intervention.

Objective To evaluate the feasibility and validity of near infrared fluorescence imaging with indocyanine green in sentinel node biopsy for cN0 oral carcinoma.Methods Thirty cases of previously untreated oral carcinoma staged cT1-3 N0M0 were enrolled in this study.1 ml of indocyanine green (25 mg/ 5 ml) was injected both around the primary tumor in a 4 quadrant pattern and in the base of the tumor before skin incision.After elevation of the platysma flap and posterior retraction of the sternocleidomastoid muscle,fluorescence images were taken with a near infrared fluorescence detector until the hotspots were captured,then the hotspot lymph nodes were removed.Lymph nodes identified with fluorescent hotspots and verified in vivo were defined as sentinel nodes,and they were harvested and sent together with neck dissection specimen for pathologic study.Results Sentinel nodes were successfully harvested in all 30 cases.The number of sentinel nodes per case varied from 1 to 9,with an average number of 3.4.Routine pathology demonstrated that occult metastasis was exclusively found in the sentinel nodes in 5 cases (16.67％),and all the other lymph nodes were free from metastasis.No tracer associated adverse effects occurred in this series.Conclusion Near infrared fluorescence imaging with indocyanine green has a high detection rate in sentinel node biopsy for cN0 oral/oropharyngeal carcinoma and the sentinel nodes can evaluate the cervical metastatic status accurately.It is an easy,feasible and promising method,which is worthy of further investigation.

[ABSTRACT]OBJECTIVEThis study was designed to compare the quality of life between patients who
underwent a tongue reconstruction with radial forearm flap (RFF) and infrahyoid myocutaneous flap (IHMCF) after hemiglossectomy for their tongue cancers, and to figure out an optimal reconstructive method for the defects resulted from hemiglossectomy.METHODSA non-randomized case-control study was performed on 24 patients with tongue squamous cell carcinoma who underwent a standard hemiglossectomy combined with perfectly tongue reconstruction from June 2005 to June 2012. All of the cases were without tongue base invasion. Of the 24 cases, 19 had T2 disease, 5 had T3 disease, and they were divided into RFF group (n=10) and IHMCF group (n=14). The quality of life were evaluated one year after operation using EORTC-QLQ30 and FACT-H&N35 and compared between the two groups.RESULTSThe scores were comparable between the two group with regard to all domains of EORTC-QLQ30,with all P values>0.05.The scores of swallowing(P=0.005), speech (P=0.008), teeth (P=0.014), and cough (P=0.009) domains were significantly higher in IHMCF group than in RFF group, with P value of 0.005, 0.008, 0.014 and 0.009 respectively, while the other domains of FACT-H&N35 were comparable between the two groups, with allP values>0.05.CONCLUSIONOverall quality of life was similar in the two groups. Oral function domains were better in IHMCF group than in RFF group. When guarantee of flap survival is available, IHMCF could be used as a good alternative flap to RFF in tongue reconstruction after hemiglossectomy.

AIM:To explore the expression of anoctamin 1 (ANO1), one of calcium-activated chloride chan-nels ( CaCCs) , in mouse cardiomyocytes and its functional properties.METHODS:The cardiomyocytes from the myocar-dial tissues of C57BL/6 mice were isolated with enzyme and purified by the differential adherent method.The cells were stained with monoclonal anti-sarcomeric actin and Cy3 to evaluate the purity of the myocardial cells.RT-PCR was used to detect the mRNA expression of ANO1 in the mouse cardiomyocytes.The protein expression of ANO1 in the mouse cardio-myocytes was determined by Western blotting analysis.The fluorescence quenching kinetics experiment was used to identify the ion transport properties of ANO1 in the mouse cardiomyocytes.RESULTS: The results of RT-PCR confirmed that ANO1 was expressed in freshly isolated myocardial cells.The results of Western blotting clearly demonstrated the protein expression of ANO1 in primarily cultured myocardial cells.Fluorescence quenching kinetics experiment on freshly isolated single myocardial cell revealed a pronounced outward rectifying property of the ANO1.The functional properties were simi-lar to the classic CaCCs.CONCLUSION:ANO1 expression was identified in the mouse myocardial cells.The function of CaCCs was generated by ANO1, suggesting that ANO1 is the molecular basis of CaCCs.

Objective To evaluate the effect of naringenin on KIM-1 expression in rats with renal interstitial fibrosis caused by unilateral ureteral obstruction(UUO).Methods 24 SD male rats were randomly divided into Sham group,UUO group and naringe-nin group(Nar group),respectively.Rats in UUO group and Nar group got UUO to establish renal interstitial fibrosis models. Rats in Sham group only free but not ligated and cut ureters.Rats were administered saline and naringenin 25 mg/(kg·d)for 14 days.Then,24 h urine samples were collected before the rats were killed,and KIM-1 in these samples were measured by ELISA. Specimens were obtained from obstructive renal,the pathological change of renal tubule and interstitial were observe by HE and Masson staining.Moreover,the tubulointerstitial damage index was scored and the expression of KIM-1 in renal tissue was examined by immunohistochemical staining.Results Compared with Sham group,the tubulointerstitial damage index of UUO group significantly increased(P <0.05),contents of KIM-1 in urine and renal tissues also significantly increased(P <0.05).Com-pared with UUO group,the tubulointerstitial damage index score of Nar group alleviated(P <0.01),contents of KIM-1 in urine and renal tissues also reduced(P <0.05 ).Correlation analysis showed that there was positive correlation between KIM-1 in urine and renal tissues and TDI(r=0.862,0.866,P <0.01).Conclusion Naringenin can relieve renal interstitial fibrosis and reduce the content of KIM-1.

Objective To observe imaging characteristics of carotid body tumor and schwannoma in carotid space. Methods CT, MRI and digital subtraction angiography (DSA) appearances of 16 patients with carotid body tumors and schwannomas in carotid space confirmed pathologically were retrospectively analyzed. There were 8 patients with carotid body tumors and 8 patients with schwannomas. Six patients with carotid body tumors and 5 patients with schwannomas underwent CT plain scan. All the patients underwent MR plain and contrast-enhanced scan. Four patients with carotid body tumors and 2 patients with schwannomas underwent DSA examination. Results CT: Six carotid body tumors were lobulated soft tissue masses. The density of the tumors was similar to neck muscles. Two carotid body tumors involving jugular foramen expanded jugular foramen, and the margin was irregular and erosion-destructive. Five schwannomas were ovoid or fusiform soft tissue masses. The density of the tumors was mixed. Two schwannomas involved jugular foramen expanded jugular foramen, and the margin was smooth. MRI: Eight carotid body tumors were lobulated, well-defined, longitudinal growth masses with characteristic high-velocity flow voids. The tumor splayed and surrounded internal carotid artery and external carotid artery. The diameters of the arteries were normal. The tumors intensely enhanced on contrast-enhanced MRI. Eight schwannomas were ovoid or fusiform, well-defined, longitudinal growth masses with heterogeneous signal, splaying carotid artery and jugular vein. The diameters of the vessels were narrow. The tumors nonuniformly enhanced on contrast-enhanced MRI. DSA: Four carotid body tumors showed intense tumor blush, while 2 schwannomas showed slight tumor blush. Conclusion According to the imaging characteristic of the tumors, carotid body tumor and schwannoma in carotid space can be accurately differentiated.