Objective:To determine the prevalence of self-reported food allergies among children in the grasslands of North China and to analyze its associated risk factors.Methods:In this study, a cross-sectional epidemiological survey method was used to select children under 14 years old by multi-stage, stratified and random cluster sampling in the grassland ecological area of Zhangbei County, Hebei Province, China from May to July 2018. Face-to-face questionnaires were administered to gather food allergy-related information from the participants. Multivariate logistic regression analysis was used to analyze the risk factors associated with self-reported food allergy.Results:A total of 2 086 children completed the survey. The prevalence of self-reported food allergies was 22.0%(459/2 086). The prevalence of multiple food allergies (≥3 types) was 3.1%(64/2 086) versus 16.3% (341/2 086) for a single food allergy among all children. Mango allergy (6.1%, 127/2 086) was the most common, followed by peach allergy (4.1%, 85/2 086). Children who reported food allergies had a significantly higher prevalence of all 4 atopic disorders (eczema, asthma, allergic rhinitis, and allergic conjunctivitis than those without food allergies(35.73% vs. 20.65%, 5.88% vs. 2.77%, 17.86% vs. 7.38%, 16.78% vs. 10.45%, χ2 =44.663 1, 10.434 3, 45.038 3, 13.728 4, all P<0.001).Significantly associated risk factors of food allergy were found to be pollen allergy ( OR: 2.29; 95% CI: 1.80-2.92) and drug allergy ( OR: 1.53; 95% CI: 1.12-2.09). Conclusions:The prevalence of self-reported food allergies among children in the Zhangbei County area of the North China Grassland was relatively high. Pollen allergy and drug allergy are major risk factors.

Objective:To determine the prevalence of self-reported food allergies among children in the grasslands of North China and to analyze its associated risk factors.Methods:In this study, a cross-sectional epidemiological survey method was used to select children under 14 years old by multi-stage, stratified and random cluster sampling in the grassland ecological area of Zhangbei County, Hebei Province, China from May to July 2018. Face-to-face questionnaires were administered to gather food allergy-related information from the participants. Multivariate logistic regression analysis was used to analyze the risk factors associated with self-reported food allergy.Results:A total of 2 086 children completed the survey. The prevalence of self-reported food allergies was 22.0%(459/2 086). The prevalence of multiple food allergies (≥3 types) was 3.1%(64/2 086) versus 16.3% (341/2 086) for a single food allergy among all children. Mango allergy (6.1%, 127/2 086) was the most common, followed by peach allergy (4.1%, 85/2 086). Children who reported food allergies had a significantly higher prevalence of all 4 atopic disorders (eczema, asthma, allergic rhinitis, and allergic conjunctivitis than those without food allergies(35.73% vs. 20.65%, 5.88% vs. 2.77%, 17.86% vs. 7.38%, 16.78% vs. 10.45%, χ2 =44.663 1, 10.434 3, 45.038 3, 13.728 4, all P<0.001).Significantly associated risk factors of food allergy were found to be pollen allergy ( OR: 2.29; 95% CI: 1.80-2.92) and drug allergy ( OR: 1.53; 95% CI: 1.12-2.09). Conclusions:The prevalence of self-reported food allergies among children in the Zhangbei County area of the North China Grassland was relatively high. Pollen allergy and drug allergy are major risk factors.

Objective:To study the pupillary centroid shift of myopia and characteristics of pupil diameter change from scotopic to photopic condition.Methods:A case series study was carried out, 140 eyes of 70 myopia patients from September to November 2016 in Tianjin Eye Hospital were enrolled.The pupillary centroid shift and pupil diameter parameters were measured by visual quality analyzer from scotopic (0.017 lx) to photopic (10.400 lx) condition.This study followed the Declaration of Helsinki.Results:Under the scotopic and photopic conditions, the pupil diameter was positively correlated between the bilateral eyes (scotopic: rs=0.85, P<0.001; photopic: r=0.85, P<0.001), and the pupil diameter variation from scotopic to photopic condition was positively correlated between the bilateral eyes ( r=0.75, P<0.001). The pupil diameter in scotopic and photopic conditions, and the change of pupil diameter in the right eyes were significantly higher than those in the left eyes (all at P<0.05). The pupillary centroid shift was within 0.2 mm in the left eyes of 94.2% (66/70) subjects and in the right eyes of 97.1%(68/70) subjects.The pupillary centroid shift of all subjects was within 0.3 mm.From scotopic to photopic condition, the pupil centroid was mainly shift to the nasal superior direction.There was no significant correlation between pupil diameter and age or gender.There was no significant correlation between pupillary centroid shift and age, diopter or pupil diameter. Conclusions:The binocular pupillary centroid shift are symmetrical from scotopic to photopic condition in myopic eyes, and the pupil centroid mainly shift to nasal superior direction.

Objective To investigate the effect of parathyroid hormone(PTH)on the proliferation and invasion of chondrosarcoma cells,and the relationship between PTH and the regulation of primary cilia expression.Methods After stimulation of the chondrosarcoma cell line SW1353 with different concentrations of PTH,induction of the expression of cilia with hypoxia and destruction of cilia structure with chloral hydrate,the cell viability was detected by CCK8 assay,the proliferation and invasion of SW1353 by Western blotting and Transwell method,the primary cilia expression by immunofluorescence assay and the GLI1,PTCH1 and IFT88 expression levels by real-time PCR.Results PTH could promote the proliferation of chondrosarcoma cells in a concentration-dependent manner and this effect was correlated with the structural integrity of the primary cilia.PTH could up-regulate the invasive ability of SW1353 cells and increase the expression levels of MMP9,which was suppressed when the primary cilia structure was damaged.Additionally,it was found that PTH could down-regulate the number of primary cilia,which was related to the structural integrity of the primary cilia.It could also regulate the expression levels of GLI1 and PTCH1,the target genes in Hedgehog pathway,and the expression levels of IFT88,the gene associated with the cilia function.Conclusion PTH can promote the proliferation and invasion of chondrosarcoma cells,down-regulate the expression of primary cilia and the downstream target genes.PTH may regulate the malignant biological features of chondrosarcoma by regulating the primary cilia expression.

Objective To investigate the effect of TanshinoneⅡA on nerve conduction of oxaliplatin induced peripheral neuropathy in rats. Methods Fifty Wistar rats were randomly divided into normal control group, model group, treatment group, prevention group, prevention and treatment group. Except for those in model group, Wistar rats were injected i.p. with oxaliplatin (20 mg/kg). The electrophysiological instrument were employed to detect the sciatic nerve conduction velocity, latency, amplitude 6 h, 24 h, 72 h and 7 d after modeling. Results In the model group, velocity of sciatic nerve conduction slowed, and latency prolonged 24 h after modeling (P<0.05) which continued to slow and prolong until 7 d after modeling (P<0.05). After the application of Tanshinone ⅡA, nerve conduction velocity became faster and latency shorter significantly (P <0.05), especially in the prevention and treatment group, in which no significant difference was found when compared with those in the normal control group (P > 0.05). Conclusions During the chemotherapy with oxaliplatin , TanshinoneⅡA can increase the conduction velocity of sciatic nerve , shorten the disease duration and play a protective role for peripheral nerve.

Objective To observe the pain behavior of rats with Oxaliplatin‐induced peripheral neuropathy(OXIPN)and cal‐citonin gene related peptide(CGRP)expression.Methods Twenty Wistar rats were randomly divided into 2 groups :normal con‐trol group and model group.Oxaliplatin(20 mg/kg)was injected intraperitoneally to the rats in the model group.Mechanical pain threshold and cold allodynia were detected before and 6 ,24 ,72 h and 7 days after modeling ,respectively.Western blot and im‐munohistochemical method were employed to measure the expression of CGRP in dorsal spinal root ganglion of control group and model group.Results The mechanical pain threshold of modal group rats decreased 6 h after injection of Oxaliplatin as compared with the normal group[(11.6 ± 2.2)g vs. (13.9 ± 3.7)g] ,and decreased with prolongation of time ,reduced to the lowest at 72 h[(3.9 ± 1.4)g]and maintained to day 7 ,and the same trend was found in cold chemical allodynia test.CGRP ex‐pression of dorsal root ganglion increased significantly in the model group rats ,and there was a significant positive correlation between the expression of CGRP and the degree of mechanical pain threshold.Conclusion CGRP plays an important role in Ox‐aliplatin‐induced central sensitization of rats with peripheral neuropathy.