Classification of idiopathic inflammatory myopathies based on clinical manifestations and myositis-specific antibodies / 南方医科大学学报

OBJECTIVE@#To investigate the classification of idiopathic inflammatory myopathies (IIM) based on clinical manifestations and myositis- specific antibodies using cluster analysis.@*METHODS@#We retrospectively analyzed the data of patients with IIM admitted in Nanfang Hospital in 2015-2019. The clinical data of the patients including serum creatine kinase (CK), interstitial lung disease (ILD), cancer, and myositis-specific antibodies were collected for two-step cluster analysis to identify the distinct clusters of patients, whose clinical characteristics were subsequently analysed.@*RESULTS@#A total of 71 patients with IIM were included in this study, including 30 (42.3%) with polymyositis (PM), 20 (28.2%) with classic dermatomyositis (DM), 16 (22.5%) with amyopathic dermatomyositis (CADM), and 5 (7.0%) with immune-mediated necrotizing myopathy (IMNM). Two-step cluster analysis identified 3 distinctive subgroups: Cluster 1 of 15 (51.7%) patients characterized by rash, positive anti-MDA5 antibody and hypoproteinemia ( < 0.05) with normal or slightly elevated CK level, mainly corresponding to CADM; Cluster 2 of 4 (57.1%) patients with significantly elevated CK and positive anti-SRP antibody ( < 0.001) corresponding to IMNM; and Cluster 3 of 17 (48.6%) patients consisting primarily of patients with PM, characterized by positivity for anti- aminoacyl transfer RNA synthetases antibodies (=0.022) corresponding to antisynthetase syndrome (ASS).@*CONCLUSIONS@#Patients with IIM can be divided into 3 subgroups based on their clinical and serological characteristics (especially myositis-specific antibodies), and among them ASS may represent an independent IIM subgroup with unique clinical characteristics.

Classification of idiopathic inflammatory myopathies based on clinical manifestations and myositis-specific antibodies / 浙江大学学报·医学版

OBJECTIVE@#To investigate the classification of idiopathic inflammatory myopathies (IIM) based on clinical manifestations and myositis- specific antibodies using cluster analysis.@*METHODS@#We retrospectively analyzed the data of patients with IIM admitted in Nanfang Hospital in 2015-2019. The clinical data of the patients including serum creatine kinase (CK), interstitial lung disease (ILD), cancer, and myositis-specific antibodies were collected for two-step cluster analysis to identify the distinct clusters of patients, whose clinical characteristics were subsequently analysed.@*RESULTS@#A total of 71 patients with IIM were included in this study, including 30 (42.3%) with polymyositis (PM), 20 (28.2%) with classic dermatomyositis (DM), 16 (22.5%) with amyopathic dermatomyositis (CADM), and 5 (7.0%) with immune-mediated necrotizing myopathy (IMNM). Two-step cluster analysis identified 3 distinctive subgroups: Cluster 1 of 15 (51.7%) patients characterized by rash, positive anti-MDA5 antibody and hypoproteinemia ( < 0.05) with normal or slightly elevated CK level, mainly corresponding to CADM; Cluster 2 of 4 (57.1%) patients with significantly elevated CK and positive anti-SRP antibody ( < 0.001) corresponding to IMNM; and Cluster 3 of 17 (48.6%) patients consisting primarily of patients with PM, characterized by positivity for anti- aminoacyl transfer RNA synthetases antibodies (=0.022) corresponding to antisynthetase syndrome (ASS).@*CONCLUSIONS@#Patients with IIM can be divided into 3 subgroups based on their clinical and serological characteristics (especially myositis-specific antibodies), and among them ASS may represent an independent IIM subgroup with unique clinical characteristics.

Study on establishment of spastic cerebral palsy model of macaque by partial resection of motor cortex / 中华实用儿科临床杂志

Objective To establish spastic cerebral palsy model of macaque by partial resection of motor cortex and explore its evaluation method.Methods Four individuals of 3-month-old macaques were divided into healthy control group and operation model group according to random number table.Partial resection of the motor cortex was carried out in operation model group,in which precentral gyrus cortex from above the right lateral cerebral fissure to the inter-hemicerebral fissure,together with the posterior-superior frontal gyrus (about 0.3 to 0.5 cm in front of the anterior median sulcus) cortex were removed with the depth of about 0.5 to 0.6 cm.After the operation,the continuous camera shooting was used to record whether left limb motor dysfunction and abnormal posture existed or not.Muscle tension was assessed by manual examination of muscle tone with reference to the modified Ashworth scale.The quantitative indexes of the two groups were detected by using the gross motor and fine motor assessment scale.9.4T magnetic resonance imaging (MRI) was used to detect the brain imaging changes.Results After operation,the macaque in the operation model group immediately showed left hemiparesis,left upper limb abnormal lifting,left lower limb paralysis,left limb claudication,and eating mainly relied on the right side of the body.After 6 weeks of operation,left limb activity of the operation model group was significantly lower than that of the healthy control group,and the gross motor scores and fine motor scores were significantly lower than those of the healthy control group(Friedman test:χ2=33.939,P<0.05;χ2=37.526,P<0.05).The macaque in the operation model group showed some symptoms that abnormal posture mainly tilted to the left for the rest,sitting in a corner of the monkey cage,left arm was put on the cage to maintain postural balance,and movement was left slightly inclined,which had simulated the typical clinical manifestations of human spastic hemiplegic cerebral palsy.Muscle tension was checked by hand,and the left limb paralysis and muscle tension decreased after operation in the model group,and the left muscle tension increased gradually after 5 weeks,and gradually increased to score 4 points and the score remained 3 after 10 weeks.Brain MRI of 3 weeks postoperatively suggested scar tissue formation after right motor cortex resection,which supported the pathological changes of the hemiplegic cerebral palsy models.Conclusions Through the partial resection of the motor cortex,the model of spastic cerebral palsy was established successfully.The results of behavioral evaluation and MRI showed that the model was consis-tent with spastic hemiplegia.

Incidence and mortality of cancers appeared in the Hebei provincial cancer registry system in 2011 / 中华流行病学杂志

Objective To analyze the cancer incidence and mortality in Hebei cancer registry available areas in 2011.Methods Data were collected from 8 population-based cancer registries systems in Hebei province.Incidence and mortality rates stratified by areas (urban/rural),sex,age group and cancer site were analyzed.10 common cancers in different groups,proportions and cumulative rates were calculated.The Chinese population census in the year 2000 and Segi's populations were used for age-standardized incidence/mortality rates.Results In all the 8 cancer registries that covering a total of 4 573 293 population (2 139 779 in urban and 2 433 514 in rural areas),data was used for the analysis.The total new cancer incidence cases and deaths were 11 269 and 7 477,respectively.All the morphologically verified cancer cases (MV％) accounted for 75.26％ while 3.85％ of the incident cases were identified only through death certification records (DCO％).The mortality to incidence ratio appeared as 0.66.The crude incidence appeared in the Hebei cancer registration areas was 246.41/105 (264.55/105 in males and 227.75/105 in females).The age-standardized incidence rates by Chinese standard population (ASIRC) and by world standard population (ASIRW) appeared as 207.13/105 and 206.61/105 respectively,with the cumulative incidence rates as (0-74 age years old) 23.57％.The cancer incidence and ASIRC were 242.64/105 and 200.19/105 in urban areas,whereas 249.72/105 and 214.11/105,respectively in rural areas.The crude mortality in Hebei cancer registration areas was 163.49/105(196.54/105 in male,129.51/105 in female),with age-standardized mortality rates by Chinese standard population (ASMRC) and by world standard population (ASMRW) as 144.48/105 and 147.69/105.The cumulative mortality rate (0-74 age years old) was 14.71％.The cancer mortality (167.91/105) in rural areas seemed higher than the mortality (158.47/105) in urban areas.The most common sites of cancers were:stomach,lung,esophagus,breast,liver and colorectal,which accounted for 71.66％ of all the cancer cases.Lung cancer,stomach cancer,esophagus cancer,liver cancer and colorectal cancer were the major causes responsible for the cancer deaths in the areas with data of cancer registration,which accounted for 74.79％ of all the cancer deaths.Conclusion The coverage of Hebei cancer registration population could reflect the cancer burden in various areas and populations.The most commonly seen cancers were stomach,lung,esophagus,breast,liver,and colorectal,in Hebei province.In order to reduce the burden of cancers,prevention and control measures should be strengthened.

Zaocys type II collagen regulates mesenteric lymph node Treg/Th17 cell balance in mice with collagen-induced arthritis / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the effect of oral administration of Zaocys type II collagen (ZCII) on the percentages of Treg/Th17 cells in mesenteric lymph node lymphocytes (MLNLs) in mice with collagen-induced arthritis (CIA).</p><p><b>METHODS</b>CIA was induced in male C57BL/6 mice by immunization with chicken type II collagen. Three weeks later, ZCII, purified by pepsin digestion, was orally administered in the mice for 7 consecutive days (daily dose of 10, 20, or 40 µg/kg). The severity of arthritis in each limb was evaluated using a macroscopic scoring system, and histopathological changes of the joint were observed microscopically with HE staining. The percentages of Treg and Th17 cells in MLNLs was detected by flow cytometry, and the levels of transforming growth factor-β (TGF-β) and interleukin-17 (IL-17) in the supernatant of MLNLs were measured by enzyme-linked immunosorbent assay.</p><p><b>RESULTS</b>Compared with normal control mice, the mice with CIA had significantly higher scores for arthritis and histopathological changes, with also significantly increased percentages of Treg and Th17 cells in MLNLs and elevated levels of TGF-β and IL-17 in MLNL supernatant (P<0.05). In ZCII peptide-treated mice, the scores for arthritis and histopathological changes were significantly lower than those in CIA model group (P<0.05), and Treg cell percentage in MLNLs was up-regulated while Th17 cell percentage lowered; the level of TGF-β was increased but IL-17 was decreased significantly (P<0.05).</p><p><b>CONCLUSION</b>Oral administration of ZCII improves CIA in mice by regulating the percentages of Treg/Th17 cells and the cytokine levels in MLNLs, suggesting the value of ZCII as a promising candidate agent for treatment of rheumatoid arthritis.</p>

Analysis on Epidemiological Characteristics and its Related Risk Factors of Chronic Diseases among Adult Residents in Hebei Province / 中国慢性病预防与控制

Objective To understand the epidemiological status of chronic diseases and its related risk factors among adult residents in Hebei province.Methods A total of 4 200 adults from 20 districts in Hebei province were selected by multistage stratified random sampling method,and they were investigated with questionnaire,and the body measurement and blood sample were analyzed.Results The prevalent rates of overweight,obesity,central obesity,hypertension,dyslipidemia and diabetes mellitus were 35.19%,16.38%,52.98%,38.50%,39.62% and 5.81%,respectively.The age-adjusted rates were 30.28%,14.05%,44.32%,27.86%,32.71% and 4.00%,respectively.The prevalence of chronic diseases was highly associated with age.The prevalence of chronic diseases in male was higher than that in female among people aged under 55 yrs,but lower among people aged over 55 yrs.The rates were higher in urban areas than in rural areas.The prevalence rates of cigarette smoking and alcohol-drinking in male were higher than in female(P