Background::In the clinic, practitioners encounter many patients with an abnormal pattern of dense punctate magnetic resonance imaging (MRI) signal in the basal ganglia, a phenomenon known as "cheese sign". This sign is reported as common in cerebrovascular diseases, dementia, and old age. Recently, cheese sign has been speculated to consist of dense perivascular space (PVS). This study aimed to assess the lesion types of cheese sign and analyze the correlation between this sign and vascular disease risk factors.Methods::A total of 812 patients from Peking Union Medical College Hospital (PUMCH) dementia cohort were enrolled. We analyzed the relationship between cheese sign and vascular risk. For assessing cheese sign and defining its degree, the abnormal punctate signals were classified into basal ganglia hyperintensity (BGH), PVS, lacunae/infarctions and microbleeds, and counted separately. Each type of lesion was rated on a four-level scale, and then the sum was calculated; this total was defined as the cheese sign score. Fazekas and Age-Related White Matter Changes (ARWMC) scores were used to evaluate the paraventricular, deep, and subcortical gray/white matter hyperintensities.Results::A total of 118 patients (14.5%) in this dementia cohort were found to have cheese sign. Age (odds ratio [OR]: 1.090, 95% confidence interval [CI]: 1.064-1.120, P <0.001), hypertension (OR: 1.828, 95% CI: 1.123-2.983, P = 0.014), and stroke (OR: 1.901, 95% CI: 1.092-3.259, P = 0.025) were risk factors for cheese sign. There was no significant relationship between diabetes, hyperlipidemia, and cheese sign. The main components of cheese sign were BGH, PVS, and lacunae/infarction. The proportion of PVS increased with cheese sign severity. Conclusions::The risk factors for cheese sign were hypertension, age, and stroke. Cheese sign consists of BGH, PVS, and lacunae/infarction.

OBJECTIVE To clarify the core content of traditional Chinese medicine （TCM） policy in the provinces of China， so as to provide reference for optimizing the structure of the policy system of traditional Chinese medicine in China and assisting the inheritance and innovation of TCM industry in various regions. METHODS The websites of directly affiliated organs in 31 provinces， excluding Hong Kong， Macao and Taiwan， were retrieved to collect the TCM policies released from 2000 to 2021. The importance of keywords in the TCM policies of each province was measured based on term frequency-inverse documentation frequency （TF-IDF） keyword extraction method， and the similarities and differences were analyzed among TCM policies. RESULTS & CONCLUSIONS A total of 99 documents related to TCM policies of various provinces were obtained in this study， most of which were released after 2016. The theme of national TCM policy covered four aspects： building TCM talent team， perfecting TCM service system， strengthening TCM resource management and promoting TCM industry innovation. The TF-IDF values of “medical institutions”“traditional Chinese medicine”“medical treatment” were higher than other keywords in each province， indicating that the provinces paid more attention to the construction of TCM service system and the management of TCM resources than other aspects. Anhui and Jiangsu， Beijing and Henan， Hubei and Jilin， Hubei and Tianjin， and Hubei and Yunnan had the more degree of similarity in TCM policies， which all contained 16 of the same keywords. Therefore， the above regions should be encouraged to strengthen exchanges and cooperation and realize mutual promotion and joint development. Among all the keywords whose importance ratio was greater than 0.2，“ Tibetan medicine” was unique to Qinghai and Tibet，“ disease type” was unique to Guangdong， and the TF-IDF value of “supervision and management” in Beijing was higher， indicating that the emphasis of TCM policy formulation in different provinces was various. Meanwhile， the top 10 keywords of TF- IDF value in all provinces did not have words related to financial input， and the TF-IDF values of “informatization” in most provinces did not rank at the top. It is suggested to increase financial input or encourage social financing， and add “Internet+new business” in the field of TCM.

Objective: To evaluate the value of cerebrospinal fluid markers expecially total-tau protein (T-tau), phosphorylated-tau protein (P-tau) in diagnosis and differentiation of sporadic Creutzfeldt-Jakob disease (sCJD). Methods: sCJD (according to 2009 Brain criteria, 2018 Neurology amended criteria), Alzheimer's disease (AD; the National Institute on Aging at National Institutes of Health and the Alzheimer's Association revised guidelines 2011 criteria) and other patients without cognitive impairment, matched for sex and age, in the Department of Neurology, Peking Union Medical College Hospital from 2018 to 2019 were enrolled. Twelve sCJD patients, 49 AD patients and 14 normal controls were enrolled. Cerebrospinal fluid (CSF) specimens were collected through gravity dropping directly, and further stored in -80 ℃ and disposed according to widely used standards. The levels of T-tau and P-tau were measured by ELISA. The data on electroencephalogram and neuroimaging findings of sCJD patients were recorded. Moreover, specimens of sCJD patients were sent to the Chinese Center for Disease Control and Prevention to test 14-3-3 protein and PRNP genotype. Results: Using Mann-Whitney U test, T-tau concentrations were found higher in patients with sCJD (1 211(448, 2 227) pg/ml) than in AD patients (549(314, 1 078) pg/ml; U=178, P=0.034 9), and both groups had higher T-tau than the control group (127(79, 192) pg/ml; U=20, 73, P<0.01). The level of P-tau was significantly increased in AD patients (72(58,109) pg/ml) compared to the control group (27(15, 42) pg/ml; U=82, P<0.01), but not in sCJD patients (32(24, 47) pg/ml). The T-tau/P-tau ratio was higher in sCJD patients (29.77(20.01, 54.53)) than in AD patients (7.45(4.79, 10.43); U=87, P<0.01). Twelve sCJD patients had cotical hyperintensity on diffusion weighted imaging and five had periodic three-phase waves on electroencephalogram. Nine sCJD patients, whose CSF samples were tested in the Chinese Center for Disease Control and Prevention, carried an M/M genotype at codon 129 and E/E at codon 219. Conclusion The CSF tau level and T-tau/P-tau ratio are significantly increased in sCJD, which may promote the diagnosis and differentiation of sCJD in routine clinical setting.

Objective: To analyze the disease burden of pancreatic cancer in China in 1990 and 2017. Methods: Province-specific data in China from the Global Burden of Disease Study (GBD) 2017 were used to describe the change of death status, disease burden of pancreatic cancer in Chinese population by specific province and age groups, including incidence, mortality, disability-adjusted life years (DALY), years of life lost (YLL) due to premature mortality and years lived with disability (YLD) in 1990 and 2017. Meanwhile the incidence, mortality, DALY rate, YLL rate, YLD rate were standardized by the GBD global standard population in 2017. Results: In 2017, the new cases of pancreatic cancer, incidence and age-standardized incidence accounted for 83.6 thousand, 5.92/100 000 and 4.37/100 000 in China, with an increase of 230.94%, 180.45% and 49.88% compared with 1990, respectively. The total number of deaths, mortality and age-standardized mortality appeared as 85.1 thousand, 6.02/100 000, 4.48/100 000, with an increase of 236.08%, 184.80% and 47.51% respectively. The incidence and mortality of pancreatic cancer increased with age and accelerated from the age of 55 to 59 both in 1990 and 2017. The highest incidence and mortality showed in 85-89 years old in 2017 and in 90-94 years old in 1990. The standardized DALY rate of pancreatic cancer increased from 71.00/100 000 in 1990 to 94.32/100 000 in 2017, increased by 32.84%. The standardized YLL rate increased from 70.39/100 000 to 93.42/100 000, increased by 32.72%. The standardized YLD rate increased from 0.62/100 000 to 0.90/100 000, increased by 45.80%. In terms of age distribution, DALY rate, YLL rate and YLD rate of pancreatic cancer basically showed an increasing trend with age in 1990 and 2017. In 2017, Jiangsu (7.61/100 000), Shanghai (7.52/100 000) and Liaoning (6.84/100 000) ranked the top three provinces in terms of standardized mortality. Compared with 1990, Henan (104.28%), Sichuan (94.02%) and Hebei (90.39%) saw the fastest increase in standardized mortality. Conclusions The incidence, mortality and disease burden of pancreatic cancer in China increased significantly from 1990 to 2017. Prevention and control measures should be strengthened to reduce the disease burden of pancreatic cancer.

Objective: To analyze the lung cancer deaths attributable to ambient PM_2.5 exposure in China in 2016. Methods: All data were from the Global Burden of Disease Study 2016 (GBD 2016). Multiple-source data, including satellite observation, ground measurement, chemical migration model simulation, etc., and the data integration model for air quality (DIMAQ) were used to estimate the grid-level exposure to ambient PM_2.5. Data from the vital registry and cancer registry were used to establish statistical model to estimate the lung cancer deaths by province, age and gender. The lung cancer deaths attributable to PM_2.5 were calculated based on the calculation of population attributable fraction (PAF). The GBD world population age structure was adopted to calculate age-standardized rates for comparison among provinces (including 31 provinces, autonomous regions and municipalities directly under the central government, as well as Hong Kong and Macao special administrative regions, excluding Taiwan of China). Results: In 2016, the lung cancer deaths attributable to ambient PM_2.5 exposure in China were 14.56×10⁴ (95% uncertainty interval (UI): 9.63×10⁴-19.55×10⁴), accounting for 24.66% (95%UI: 16.38%-33.12%) of total lung cancer deaths. The lung cancer death rate attributable to PM_2.5 increased with age, with the lowest among 25-29 age group (0.25/10⁵, 95%UI: 0.17/10⁵-0.34/10⁵), the highest among ≥80 age group (90.70/10⁵, 95%UI: 59.85/10⁵-122.20/10⁵). The lung cancer death rate attributable to PM_2.5 among males (14.84/10⁵, 95%UI: 9.78/10⁵-19.93/10⁵) was higher than that in females (6.21/10⁵, 95%UI: 4.07/10⁵-8.40/10⁵). The age-standardized death rates (ASDR) of lung cancer attributable to PM_2.5 among males and females in China were higher than the global average level. The attributable ASDR of lung cancer varied among provinces, highest in Shandong (13.51/10⁵, 95%UI: 9.14/10⁵-18.20/10⁵) and lowest in Tibet (0.85/10⁵, 95%UI: 0.44/10⁵-1.51/10⁵). Conclusion In 2016, the lung cancer deaths attributable to ambient PM_2.5 exposure in China was heavy, and varied in different age groups, genders and provinces.

OBJECTIVE： To investigate the effects of benzoxazole derivative 2-（chlorobenzoxazolyl-2-yl）-4，5，6，7-tetrahydro- dihydro-indazole-3-ol （PO-296） on the differentiation of murine bone marrow-derived dendritic cells（DC） and their related indexes as specific surface molecules and inflammatory cytokines. METHODS： Bone marrow nuclear cells of mice were isolated， and immature DC （imDC） was obtained by recombinant mice granulocyte macrophage colony-stimulating factor and recombinant mice IL-4. After pretreated with low-dose， medium-dose and high-dose （1， 5， 25 μmol/L） of PO-296， DC was obtained by lipopolysaccharide induction. Flow cytometry was used to detect the expression of DC specific surface molecules [i.e. the proportion of class Ⅱ major histocompatibility complex （MHC Ⅱ）， CD80， CD86 and chemokine receptor 7 （CCR7） positive cells]， imDC phagocytosis （i.e. the proportion of dextran positive cells） and DC survival （i.e. the proportion of survival cells）. ELISA method was used to detect the levels of inflammatory cytokines （IL-10， IL-12 and TNF-α） in cell culture medium. RESULTS： Compared with imDC group， the proportion of MHC Ⅱ， CD80 and CD86 positive cells were increased significantly in non-loading group （P＜0.05）. Compared with non-loading group， the levels of IL-10 in cell culture medium were increased significantly in PO-296 groups. The proportions of MHC Ⅱ， CD80 and CD86 positive cells in positive group and PO-296 medium-dose and high-dose groups as well as the levels of IL-12 and TNF-α in cell culture medium in administration groups were decreased significantly （P＜0.05）. There was no statistical significance in the proportion of CCR7 positive cells， dextran positive cells and survival cells in administration groups， compared with non-loading group （P＞0.05）. CONCLUSIONS： PO-296 has no obvious cytotoxicity and does not affect the phagocytic function of imDC. At the same time， the compound can inhibit the expression of DC specific surface molecules and regulate the secretion of inflammatory cytokines.

Objective To analyze the lung cancer deaths attributable to ambient PM2.5 exposure in China in 2016. Methods All data were from the Global Burden of Disease Study 2016 (GBD 2016). Multiple?source data, including satellite observation, ground measurement, chemical migration model simulation, etc., and the data integration model for air quality (DIMAQ) were used to estimate the grid?level exposure to ambient PM2.5. Data from the vital registry and cancer registry were used to establish statistical model to estimate the lung cancer deaths by province, age and gender. The lung cancer deaths attributable to PM2.5 were calculated based on the calculation of population attributable fraction (PAF). The GBD world population age structure was adopted to calculate age?standardized rates for comparison among provinces (including 31 provinces, autonomous regions and municipalities directly under the central government, as well as Hong Kong and Macao special administrative regions, excluding Taiwan of China). Results In 2016, the lung cancer deaths attributable to ambient PM2.5 exposure in China were 14.56×104 (95% uncertainty interval ( UI ): 9.63×104-19.55×104), accounting for 24.66% (95% UI : 16.38%-33.12%) of total lung cancer deaths. The lung cancer death rate attributable to PM2.5 increased with age, with the lowest among 25-29 age group (0.25/105, 95%UI:0.17/105-0.34/105), the highest among≥80 age group (90.70/105, 95%UI: 59.85/105-122.20/105). The lung cancer death rate attributable to PM2.5 among males (14.84/105, 95% UI : 9.78/105-19.93/105) was higher than that in females (6.21/105, 95% UI : 4.07/105-8.40/105). The age?standardized death rates (ASDR) of lung cancer attributable to PM2.5 among males and females in China were higher than the global average level. The attributable ASDR of lung cancer varied among provinces, highest in Shandong (13.51/105, 95% UI : 9.14/105-18.20/105) and lowest in Tibet (0.85/105, 95% UI : 0.44/105-1.51/105). Conclusion In 2016, the lung cancer deaths attributable to ambient PM2.5 exposure in China was heavy, and varied in different age groups, genders and provinces.

Objective To analyze the lung cancer deaths attributable to ambient PM2.5 exposure in China in 2016. Methods All data were from the Global Burden of Disease Study 2016 (GBD 2016). Multiple?source data, including satellite observation, ground measurement, chemical migration model simulation, etc., and the data integration model for air quality (DIMAQ) were used to estimate the grid?level exposure to ambient PM2.5. Data from the vital registry and cancer registry were used to establish statistical model to estimate the lung cancer deaths by province, age and gender. The lung cancer deaths attributable to PM2.5 were calculated based on the calculation of population attributable fraction (PAF). The GBD world population age structure was adopted to calculate age?standardized rates for comparison among provinces (including 31 provinces, autonomous regions and municipalities directly under the central government, as well as Hong Kong and Macao special administrative regions, excluding Taiwan of China). Results In 2016, the lung cancer deaths attributable to ambient PM2.5 exposure in China were 14.56×104 (95% uncertainty interval ( UI ): 9.63×104-19.55×104), accounting for 24.66% (95% UI : 16.38%-33.12%) of total lung cancer deaths. The lung cancer death rate attributable to PM2.5 increased with age, with the lowest among 25-29 age group (0.25/105, 95%UI:0.17/105-0.34/105), the highest among≥80 age group (90.70/105, 95%UI: 59.85/105-122.20/105). The lung cancer death rate attributable to PM2.5 among males (14.84/105, 95% UI : 9.78/105-19.93/105) was higher than that in females (6.21/105, 95% UI : 4.07/105-8.40/105). The age?standardized death rates (ASDR) of lung cancer attributable to PM2.5 among males and females in China were higher than the global average level. The attributable ASDR of lung cancer varied among provinces, highest in Shandong (13.51/105, 95% UI : 9.14/105-18.20/105) and lowest in Tibet (0.85/105, 95% UI : 0.44/105-1.51/105). Conclusion In 2016, the lung cancer deaths attributable to ambient PM2.5 exposure in China was heavy, and varied in different age groups, genders and provinces.

Objective To analyze the death attributable to smoking and impact of life expectancy in China in 2013.Methods According to the characteristics of different diseases,we calculated the population attributable fractions of different diseases,death and impact of life expectancy which caused by smoking,using direct method (current smoking rate as exposure levels)and indirect method (smoking impact ratio as exposure levels),based on data from both programs of death surveillance and Chinese chronic disease risk factor surveillance of 2013.Results In 2013,smoking caused around 1.59 million deaths which accounted for 17.38％ of all deaths in China.Constituent ratio of death caused by smoking in males (23.66％) was much higher than that in females (8.30％).However,in urban areas (17.24％),it was slightly lower than that in rural areas (17.51％).Constituent ratio of death caused by smoking in the eastern regions appeared the lowest (16.81％),with western regions the highest (17.91％).In 2013,lung cancer,COPD and ischemia heart disease were the top three diseases causing deaths that related to smoking,but the top three population attributable fractions were lung cancer,COPD and nasopharyngeal carcinoma in China.In 2013,smoking caused a reduction of 2.04 years of life expectancy loss in China,with males in the western regions the highest (3.05 years).Conclusion Smoking is still an important public health problem in China.Tobacco-control-targeted programs in the heavily involved areas could reduce the number of deaths from related diseases that caused by smoking.