Objective To explore the sensitivity of antibodies against RF,APF,AKA,anti-CCP in rheumatoid arthritis (RA) and analyze the relationship between these autoantibodies in RA.MethodsFive hundreds of RA patients were studied.Immunoturbidmetry was used to measure the RF-IgM.The enzyme-linked immunosorbent assay (ELISA) was used to measure the HRF-IgG,HRF-IgA and anti-CCP.Indirect immunofluorescence was used to measure the APF and AKA.ResultsThe seropositive rates of RF-IgM,anti-CCP,APF,HRF-IgG,AKA and HRF-IgA were 78.0%,70.8%,51.8%,48.4%,45.0% and 20.0% respectively.RF-IgM could not be detected in 110 patients while the seropositive rates of anti-CCP,APF,AKA,HRF-IgG and HRF-IgA were 41.8%,27.3%,22.7%,15.5% and 1.8% respectively.Anti-CCP could not be detected in 146 patients while the seropositive rates of RF-IgM,HRF-IgG,APF,AKA and HRF-IgA were 56.8%,24.7%,16.4%,8.9% and 7.5% respectively.The combined sensitivities of RF-IgM anti-CCP and APF were higher than others.The seropositive rates were 88.6%.ConclusionsRF-IgM and anti-CCP are sensitive antibodies for diagnosis of RA.Combinations RF-IgM with anti-CCP can significantly improve the sensitivity of diagnosis of RA.

Objective To determine whether the poking reduction and bone grafting technique with guide through bony tunnel can correct a Hill-Sachs lesion. Methods A total of 30 cadaveric humeri were equally divided into three groups, 10 cadaveric humeri per group. Hill-Sachs lesions were replicated with a osseous defect involving 10% (group A ) , 20% (group B ) and 30% (group C ) of the articular surface. All the bone defects in each group were measured and the poking reduction and bone grafting technique with guide through a bony tunnel was performed in group B and group C. The preoperative and postoperative transverse arc length, longitudinal are length, depth and volume of the osseous defects in group B and group C were compared by using paired t test. Results Before reduction, the transverse arc length of the bone defects was ( 10.9 ± 1.4 )mm in group B and ( 16.3 ± 2.3 ) mm in group C ; longitudinal arc length was ( 22.4 ± 2.4 ) mm in group B and ( 28.0 ± 2.2 ) mm in group C ;depth was (6.9±0.9) mm in group B and (11. 1 ±0.9) mm in group C; volume was (708.7±93.9) mm3 in group B and (1338.3 ± 185.6) mm3 in group C. After reduction, the transverse arc length of the bone defects was (5.1 ± 2.4 ) mm in group B and ( 7.6 ± 3.6 ) mm in group C ; longitudinal arc lengthwas (10.5 ±4.9) mm in group B and (12.3 ±5.3) mm in group C; depth was (0.3±0.1 ) mm in group B and (0.4 ±0.1 ) mm in group C; volume was (48.9 ± 16.1 )mm3 in group B and (70.3 ± 37.9) mm3 in group C. The comparison of all the parameters showed statistical difference (P <0. 01 ). Conclusion The poking reduction and bone grafting technique with guide through a bony tunnel can effectively correct the Hill-Sachs lesions with humeral head osseous defects involving 20% -30% of the articular surface.

Objective:To investigate whether radiotherapy should be delivered before the application of immune checkpoint inhibitor PD-1 in patients with advanced non-small cell lung cancer (NSCLC) and evaluate the effect of previous radiotherapy on the efficacy and pulmonary toxicity of PD-1 inhibitor.Methods:Clinical data of patients with stage Ⅳ NSCLC who received immunotherapy in Henan Cancer Hospital from March 2015 to September 2019 were retrospectively analyzed. The baseline data of patients, the status of radiotherapy and immunotherapy and the pulmonary toxicity were collected. According to whether radiotherapy was given before PD-1 inhibitor application, all patients were divided into the previous radiotherapy and non-radiotherapy groups. Survival analysis was performed by Kaplan- Meier method. Results:A total of 90 patients were enrolled including 39 cases in the previous radiotherapy group and 51 cases in the non-radiotherapy group. The median follow-up time was 22.9 months. The median progression-free survival (mPFS) in the previous radiotherapy group was 7.5 months (95% CI 5.4-9.5 months), significantly longer compared with 4.1 months (95% CI 3.1-5.1 months) in the non-radiotherapy group ( P=0.003). The median overall survival (mOS) significantly differed between two groups[15.2 months (95% CI 12.3-18.1 months) vs. 9.3 months (95% CI 6.1-12.5 months)]( P=0.040). The incidence of pulmonary toxicity showed no significant difference between two groups ( P=0.154). Conclusions:Patients with stage Ⅳ NSCLC patients in the previous radiotherapy group obtain significantly better mPFS and mOS and similar pulmonary toxicity compared with their counterparts in the non-radiotherapy group. Nevertheless, the findings remain to be validated by subsequent investigations with larger sample size.

Objective: To explore the impacts of coal mine dust on lung function in rats, so as to provide the basis for the early prevention and treatment of coal worker's pneumoconiosis. Methods: Seventy-two SPF-grade 8-week-old male Sprague-Dawley rats were randomly divided into the coal dust group, the coal-silica dust group, the silica dust group and the control group. The rats in the first three groups of rats were administered 1 mL corresponding dust suspension into the lungs using non-exposure tracheal instillation, while the rats in the control group were administered 1 mL normal saline. Respiratory rate (f), forced vital capacity (FVC), peak expiratory flow (PEF) and dynamic pulmonary compliance (Cdyn) were measured at 1, 3 and 6 months after dust exposure. Lung tissues were collected to measure reactive oxygen species (ROS) and adenosine triphosphate (ATP) levels using corresponding ELISA kits and ATP assay kits, respectively. The relative mRNA expressions of peroxisome proliferators-activated receptor gamma coactivator 1-alpha (PGC-1α) and mitochondrial transcription factor A (TFAM) were detected using real-time fluorescent quantitative polymerase chain reaction assay. The relative protein expressions of PGC-1α and TFAM were detected using Western blotting. Results: There was no interaction between dust type and exposure duration on f (P>0.05), but there were interactions on FVC, PEF and Cdyn (all P<0.05). Compared with the control group at 6 months after dust exposure, the f of the rats in the silica dust group were increased, while the FVC and PEF of the rats in the coal-silica dust and silica dust groups were decreased, and Cdyn of the rats in the coal dust, coal-silica dust and silica dust groups were decreased (all P<0.05). There were interactions between dust type and exposure duration on ROS and ATP levels, the relative mRNA and protein expressions of PGC-1α and TFAM (all P<0.05). Compared with the control group at 3 and 6 months after dust exposure, the ROS levels in the rats in the coal dust, coal-silica dust and silica dust groups were increased, while the ATP levels, the relative mRNA and protein expressions of PGC-1α and TFAM were decreased (all P<0.05). Conclusion The lung function impairment in rats caused by different types of coal mine dust is related to PGC-1α-mediated mitochondrial biogenesis dysfunction, which leads to increased ROS levels, decreased ATP and TFAM levels.

OBJECTIVETo observe the effects of fenvalerate (Fen) on ovarian calcium homeostasis.

METHODShGLCs were obtained from pre-ovulatory follicles in an in vitro fertilization program, and were cultured for 72 hours. Changes in cellular [Ca(2+)]i induced by Fen in hGLCs were detected with laser scanning confocal microscopy (LSCM) by using the fluorescent Ca(2+) indicator fluo-3/AM. SD female rats were divided into four groups (control, 1/15LD(50), 1/50 LD(50) and 1/250 LD(50)) in experiment. The activity of ovarian Ca(2+)-ATPase and phosphorylase A (P-a) and the contents of calmodulin (CaM) were assessed after a 30-day Fen exposure. In addition, serum estradiol-17 beta (E(2)) and progesterone (P(0)) concentration were measured by radioimmunoassay, which the sampling rats were ensured at diestrus stage before killed according to vaginal smear.

RESULTS20.0 and 2.0 micromol/L Fen induced the increased of [Ca(2+)]i in hGLC. This [Ca(2+)]i increase mostly resulted from Ca(2+) influx in the studied concentration. Fen had shown the inhibition effects on activity of Ca(2+)-ATPase in 1/250 LD(50) group (P < 0.001) while the activity of phosphorylase A (P-a) in treated groups had significantly enhanced than those of in control. The contents of CaM in ovaries were found to be increased in treated groups. E(2) in 1/250 LD(50) group were higher while P(0) in 1/15 LD(50) group were significantly lower (P < 0.05).

CONCLUSIONExposure to Fen interferes the serum steroid hormone concentrations partly through calcium signal pathway.

Adenosine Triphosphatases ; metabolism ; Animals ; Calcium ; metabolism ; Cells, Cultured ; Female ; Gonadal Steroid Hormones ; blood ; Granulosa Cells ; drug effects ; metabolism ; Homeostasis ; drug effects ; Humans ; Insecticides ; toxicity ; Nitriles ; Ovary ; cytology ; drug effects ; metabolism ; Pyrethrins ; toxicity ; Rats ; Rats, Sprague-Dawley

OBJECTIVETo investigate the effects of carbaryl on serum steroid hormone and function of antioxidant system in female Sprague Dawley rats.

METHODSCarbaryl was administrated to the adult female rats at doses of 0, 1.028, 5.140 and 25.704 mg x kg(-1) x d(-1) for 30 d. Vaginal smears of rats were taken to determine estrous cycle. Serum 17beta-estradiol (E(2)) and progesterone (P(4)) concentrations were measured by radioimmunoassay. The activities of superoxide dismutase (SOD) and glutathione-s-transferase (GST), and the levels of malondialdehyde (MDA) and glutathione (GSH) were measured by spectrophotometry.

RESULTSThe number of estrous cycle in exposed groups were obviously lower than in control group (P < 0.05, P < 0.01). Body weight gain in high dose group (25.704 mg x kg(-1) x d(-1)) was significantly lower than that in control. Meanwhile, the organ coefficient of ovary and uterus declined in a dose-dependent manner. Serum E(2) level [(19.93 +/- 2.21) nmol/L] in 25.704 mg group was lower than in control group [(28.76 +/- 6.12) nmol/L, P < 0.05], and P(4) level (1.21 +/- 0.40) nmol/L in 1.028 mg group was higher than that in control group [(0.63 +/- 0.39) nmol/L, P < 0.05]. The activity of SOD first reduced then rose in ovary, and first rose then reduced in serum. The contents of MDA increased in ovary, while decreased in the serum. GSH contents and GST activity increased in ovary, while in serum GSH contents decreased and GST activity first increased then decreased.

CONCLUSIONCarbaryl could disrupt estrous cycle and affect serum steroid hormone, and the function of antioxidant system in female SD rats.

Animals ; Antioxidants ; metabolism ; Carbaryl ; toxicity ; Estradiol ; blood ; Female ; Glutathione ; blood ; Glutathione Transferase ; blood ; Malondialdehyde ; blood ; Progesterone ; blood ; Rats ; Rats, Sprague-Dawley ; Superoxide Dismutase ; blood

OBJECTIVETo observe the effects of fenvalerate on calcium homeostasis in rat ovary.

METHODSFemale Sprague-Dawley rats were orally given fenvalerate at daily doses of 0.00, 1.91, 9.55, and 31.80 mg/kg for four weeks. The ovary ultrastucture was observed by electron microscopy. Serum free calcium concentration was measured by atomic absorption spectrophotometry. The activities of phosphorylase a in rat ovary were evaluated by the chromatometry. The total content of calmodulin in ovary was estimated by ELISA at each stage of estrous cycle. Radioimmunoassay (RIA) was used to evaluate the level of serum progesterone.

RESULTSHistopathologically, damages of ovarian corpus luteum cells were observed. An increase in serum free calcium concentration was observed in rats treated with 31.80 mg/kg fenvalerate. The activities of phosphorylase a enhanced in all treated groups, and fenvalerate increased the total content of calmodulin significantly in estrus period. Serum progesterone levels declined in fenvalerate exposed rats in diestrus.

CONCLUSIONFenvalerate interferes with calcium homeostasis in rat ovary. Also, the inhibitory effects of fenvalerate on serum progesterone levels may be mediated partly through calcium signals.

Animals ; Calcium ; metabolism ; Calcium-Transporting ATPases ; metabolism ; Calmodulin ; metabolism ; Endocrine Disruptors ; toxicity ; Female ; Homeostasis ; drug effects ; Insecticides ; toxicity ; Nitriles ; toxicity ; Ovary ; drug effects ; metabolism ; pathology ; Progesterone ; blood ; Pyrethrins ; toxicity ; Rats ; Rats, Sprague-Dawley

ObjectiveThis work is aimed to investigate the possible association of dendritic cell immunoreceptor (DCIR) with rheumatoid arthritis (RA) susceptibility in Chinese Han population.Methods A total of 523 patients with RA and 510 healthy controls were genotyped for single-nucleotide polymorphism (SNP) rs2377422 and rs10840759.Association analyses were performed on the whole data set and on RA subsets based on the status of anti-cyclic citrullinated peptide antibody (CCP) in RA patients.Finally,we carried out the association analysis of rs2377422 with DCIR mRNA expression in RA patients.Statistical analysis used in this study included X2 test,Logistic regression,and Mann-Whitney U test.ResultsDCIR rs2377422 was found significantly associated with RA(allele analysis: OR 1.26; 95％CI 1.06～1.51,P=0.005; genotype analysis CC vs TT+TC: OR 1.34; 95％CI 1.18～2.06,P=0.004).Following stratification for anti-CCP antibody status,association of ra2377422 with anti-CCP-positive RA was observed(allele analysis: OR 1.22,95％CI 0.99～1.48,P=0.055).In contrast,the SNP rs2377422 was found specifically susceptible to anti-CCP-negative RA(allele analysis: OR 1.46; 95％CI 1.10～1.93,P=0.0091; genotype analysis CC vs TT+TC: OR 1.58;95％CI 1.01～2.47,P=0.043),despite loss of power in the analysis.DCIR gene transcription quantification analysis further proved the dominant effect of rs2480256 CC genotype on DCIR mRNA expression levels in RA patients (CC vs TT+TC: 0.429±0.069 vs 0.238±-0.023,U=1861,P=0.0015).ConclusionThe study provides evidence for the association between DCIR rs2377422 and RA,particularly with anti-CCP-negative RA in Chinese Han populations.

Objective To study the related factors of hyponatremia in the elderly patients with chronic heart failure in order to provide evidences for preventing and nursing of hyponatremia.Methods Clinical data of 143 patients over 65 years old were investigated.The patients were divided into hyponatremia group (n =47)and control group (n =96).There were 29 cases with more than 80 years older and 19 cases with 65-79 years older in hyponatremia group.The data from the two groups were compared.Results The patients in hyponatremia group were significantly older than these in control group [(88.5 ± 4.8) vs (82.5 ± 7.5),t =4.895,P ＜0.01),and the incidences of hypertension,pneumonia,diabetes and acute heart failure,as well as the usage of diuretics and nasogastric tubes in hyponatremia group were significantly higher than that in the control group(x2 =26.034,14.492,5.385,10.881,12.674,5.389;P ＜ 0.05).Very elderly patients needed longer time to achieve normal natrium level in blood serum than that elderly patients (t =5.069,P ＜ 0.01).Conclusions Hyponatremia of the elderly patients with chronic heart failure was related to hypertension,pneumonia,diabetes,acute heart failure,usage of diuretics and nasogastric tubes.The symptoms of hyponatremia in very elderly patients is atypical,which are very likely to be neglected.We should pay more attention to the special population.

To simulate intervention measures in controlling an outbreak of acute hemorrhagic conjunctivitis on one school campus by using the Susceptible-Infected-Recovered (SIR) model, to provide evidence for preparedness and response to the epidemic. Classical SIR model was used to model the epidemic. Malthusian exponential decline method was employed to estimate the infective coefficient β for interventions. The initial value of parameters was determined based on empirical data. The modeling was implemented using Matlab 7.1 software. Without interventions, the outbreak was expected to experience three phrases: (1)early stage (the first 5 days) in which the epidemic developed slowly and could be intervened easily; (2) rapid growing stage (6-15 days) in which the number of infected cases increased quickly and the epidemic could not be well controlled;and (3) medium and late stage (16 days and later) in which more than 90% of the susceptible persons were infected but the intervention measures failed to prevent the epidemic. With the implementation of interventions, the epidemic was predicted to be controlled in the early stage, under the SIR model. The simulation based on the SIR model kept an acceptable consistency with the actual development of epidemic after the implementation of intervention measures. The SIR model seemed effective in modeling interventions to the epidemic of acute hemorrhagic conjunctivitis in the schools.