Objective To observe the prevalence and risk factors of chronic low back pain in puerperas after childbirth.Methods Eight hundred and eighty-one puerperas were selected,among whom 459 cases had uterine-incision delivery,and 422 cases had spontaneous delivery.The age,height and weight of pregnant women,birth weight of newborn,history of preoperative low back pain,parity and mode of delivery were recorded.The rate of chronic low back pain occurring within 1 month after childbirth and continuing for 3 months was recorded by telephone.The factors with P values less than 0.05 would enter the Logistic regression analysis to screen the risk factors of chronic low back pain.Results Two hundred and fifty-nine puerperas (259/881,29.4％) appeared chronic low back pain,of whom 157 puerperas (157/459,34.2％)delivered by uterine-incision and 102 puerperas (102/422,24.2％) delivered spontaneously,and the difference was statistically significant (P ＜ 0.01).Six hundred and fifty-eight puerperas had no history of preoperative low back pain,and 150 puerperas (150/658,22.8％) appeared newly developed chronic low back pain.Logistic regression analysis showed that mode of delivery,parity and history of preoperative low back pain were the risk factors of chronic low back pain.Condusions The rate of chronic low back pain in puerperas after childbirth is 29.4％,and the newly developed chronic low back pain is 22.8％.Uterineincision delivery,multiparity and history of preoperative low back pain are the risk factors of chronic low back pain for puerperas after childbirth.

INTRODUCTION: The use of novel mRNA platforms for COVID-19 vaccines raised concern about vaccine safety, especially in Asian populations that made up less than 10% of study populations in the pivotal vaccine trials used for emergency use authorisation. Vaccine safety issues also remain a concern in assessing the clinical risks and benefits of vaccine boosters, particularly in specific age groups or segments of the population. This study describes a vaccination exercise involving Asian military personnel, and the adverse reactions and safety events observed. METHODS: Minor adverse reactions, hospitalisations and adverse events of special interest were monitored as part of the organisation's protocol for safety monitoring of COVID-19 vaccinations. All vaccine recipients were invited to complete an online adverse reaction questionnaire. Medical consults at the military's primary healthcare facilities were monitored for vaccine-related presentations. All hospitalisations involving vaccine recipients were analysed. Adverse reaction rates between doses, vaccines and age groups were compared. RESULTS: A total of 127,081 mRNA vaccine doses were administered to 64,661 individuals up to 24 July 2021. Common minor adverse reactions included fever/chills, body aches and injection site pain. These were more common after dose 2. Younger individuals experienced minor adverse reactions more frequently. Rare cases of anaphylaxis, Bell's palsy and myocarditis/pericarditis were observed. No deaths occurred. CONCLUSION Minor adverse reactions were less common than reported in other studies, and rates of anaphylaxis, Bell's palsy and myocarditis/pericarditis were comparable. Our study supports the favourable safety profile of mRNA COVID-19 vaccines, which may help guide decisions about booster doses if required.
COVID-19 ; COVID-19 Vaccines ; Humans ; Military Personnel ; RNA, Messenger ; SARS-CoV-2 ; Vaccines, Synthetic

Arteries ; Female ; Head ; Humans ; Middle Aged

Objective: To observe the effect of emodin on the biological behavior of human fibroblasts (FB) in culture of kidney in patients with lupus nephritis (LN). Methods: FB were isolated from kidney culture of LN patients, and the effect of emodin on 3　H-TdR incorporated rate of FB was observed. The apoptosis and c-myc gene expression were detected in the same way by flow cytometry. Results: Emodin could markedly inhibit the proliferation of human kidney FB, and inducing cell apoptosis through up-regulating c-myc gene expression in human renal FB. Conclusion: Emodin can inhibit proliferation and promote apoptosis of FB, which may be important in ameliorating interstitial fibrosis, and thus improve prognosis of LN.

OBJECTIVETo establish a new method for the preparation of porcine acellular dermal matrix.

METHODSThe antigenicity of the porcine dermis was weakened by removing epidermal and dermal cells from the porcine skin through the digestion with low-concentration trypsin and repeated freeze-thaw cycles. Split thickness porcine skin was treated with 0.05% trypsin to remove the cells from the epidermis and dermis. Repeated freeze-thaw cycles were employed to further weed out the residual cells within the dermis. The prepared acellular dermis was then examined grossly, as well as histologically, and also by immunohistochemical method.

RESULTSNo cell could be identified in the prepared porcine acellular dermal matrix. The integral basement membrane was preserved on the surface of dermal matrix with compact dermal matrix collagen structure.

CONCLUSIONLow concentration trypsinization and repeated freeze-thaw cycles seemed to be a simple and effective method for the preparation of xenogeneic acellular dermal matrix.

Animals ; Dermis ; cytology ; transplantation ; Extracellular Matrix ; transplantation ; ultrastructure ; Freezing ; Skin Transplantation ; Swine ; Tissue Engineering ; methods ; Trypsin ; administration & dosage

OBJECTIVE: To explore the characteristics of autopsy cases of anaphylactic shock induced by cephalosporins and provide the evidences in forensic medicine. METHODS: Twenty cases of anaphylactic shock induced by cephalosporins were collected from April 2005 to August 2009 in judicial expertise center of China Medical University, and the characteristics of the cases were analyzed retrospectively. RESULTS: The age of decedents ranged from 40 to 60 years. Ninety percent of cases were from local medical centers and private clinics. The symptoms of the shock appeared 30 s-150 min after the administration of the drug, and death occurred 10 min-210 min after the appearance of the shock symptoms. In all cases, various degrees of eosinophil infiltration were observed in trachea and the lungs. Serum IgE detected by ELISA method was normal value in 14 cases. CONCLUSION In fatal anaphylactic cases, little specific findings are detected during postmortem and microscope examination. For this reason, the determination of cause of death in these cases requires comprehensive analysis combined with clinic information and excludes other diseases leading to the sudden death.
Adolescent ; Adult ; Anaphylaxis/pathology* ; Anti-Bacterial Agents/adverse effects* ; Autopsy ; Cause of Death ; Cephalosporins/adverse effects* ; Child ; Child, Preschool ; Drug Hypersensitivity/pathology* ; Edema/pathology* ; Female ; Forensic Pathology ; Humans ; Immunoglobulin E/blood* ; Infant ; Infusions, Intravenous ; Larynx/pathology* ; Lung/pathology* ; Male ; Middle Aged ; Retrospective Studies ; Trachea/pathology* ; Young Adult

Objective To analyze the genetic characteristics of EV71 strains isolated from HFMD cases in Ningxia Hui Autonomous Region in 2009. Methods In 2009, totally 385 specimens from 344 HFMD cases were collected from Ningxia. Enterovirus isolation was performed in RD cell line from all the specimens. EV71 isolates were identified by specific RT-PCR from the positive cultures, and sequences of complete EV71 VP1 encoding region were determined for farther analyses. Results Totally from 126 EV strains isolated in this study, 58 EV71 strains (46%) were identified. And complete VP1 sequences of 46 EV71 strains were determined, and genetic analyses were performed. It was showed that the nucleotide identity of 46 Ningxia strains with the representatives of A and B genotypes were 81.7%-82.8% and 83. 1%-85.2%, and the amino acid identity were 93.9%-95.9% and 96. 2% -97.9% respectively. The nucleotide identity of NingXia EV71 isolates with representatives of subgenotype C1 ,C2, C3, C4a, C4b, and C5 were 88.3%-90.6% (97.9%-99.6%), 88.3%-90. 1% (97.9%-99.3%), 87.8%-89.0%(97.6% -98.9% ), 94. 2% -98. 9% ( 97. 9% -100% ), 91.8% -94. 1% ( 98.6% -99. 6% ), and 86. 7% -89. 1% (97.9%-98.9% ). Phylogenetic tree analysis revealed that 46 stains were clustered with reference stains of subgenotype C4 and the Ningxia EV71 isolates were belonged to subgenotype C4a. Conclusion EV71 of subgenotype C4a had spread widely in Ningxia in 2009, which was absolutely predominant type in Ningxia in 2009 and also as the predominant type in China mainland since 2005.

Osteoporotic vertebral compression fracture (OVCF) can lead to lower back pain and may be even accompanied by scoliosis, neurological dysfunction and other complications, which will affect the daily activities and life quality of patients. Vertebral augmentation is an effective treatment method for OVCF, but it cannot correct unbalance of bone metabolism or improve the osteoporotic status, causing complications like lower back pain, limited spinal activities and vertebral refracture. The post-operative systematic and standardized rehabilitation treatments can improve curative effect and therapeutic efficacy of anti-osteoporosis, reduce risk of vertebral refracture, increase patient compliance and improve quality of life. Since there still lack relevant clinical treatment guidelines for postoperative rehabilitation treatments following vertebral augmentation for OVCF, the current treatments are varied with uneven therapeutic effect. In order to standardize the postoperative rehabilitation treatment, the Spine Trauma Group of the Orthopedic Branch of Chinese Medical Doctor Association organized relevant experts to refer to relevant literature and develop the "Guideline for postoperative rehabilitation treatment following vertebral augmentation for osteoporotic vertebral compression fracture (2022 version)" based on the clinical guidelines published by the American Academy of Orthopedic Surgeons (AAOS) as well as on the principles of scientificity, practicality and advancement. The guideline provided evidence-based recommendations on 10 important issues related to postoperative rehabilitation treatments of OVCF.

Testicular endothelial cells have been found to play an important role in spermatogenesis and fertility, but their mechanism is obscure. Exosomes released by various cells are recognized as cell-cell communication mediators during the initiation and progression of many diseases. Therefore, the current study aimed to investigate the protein and miRNA components of human testicular endothelial cell-derived exosomes (HTEC-Exos) and to explore their potential effects on spermatogenesis. In this study, HTEC-Exos were first isolated by the ultracentrifugation method, and then identified by nanoparticle tracking analysis, transmission electron microscopy (TEM), and western blotting. The characteristics of HTEC-Exos were examined by liquid chromatography-mass spectrometry and microRNA (miRNA) chip analysis. Bioinformatics analysis was performed to explore the potential role of the exosomal content on spermatogenesis. A total of 945 proteins were identified, 11 of which were closely related to spermatogenesis. A total of 2578 miRNAs were identified. Among them, 30 miRNAs demonstrated potential associations with male reproductive disorders, such as azoospermia, and spermatogenesis disorders. In particular, 11 out of these 30 miRNAs have been proven to be involved in spermatogenesis based on available evidence. This study provides a global view of the proteins and miRNAs from HTEC-Exos, suggesting that HTEC-Exos may function as potential effectors during the process of spermatogenesis.
Endothelial Cells ; Exosomes ; Humans ; Male ; MicroRNAs ; Proteomics ; Spermatogenesis

Objective: To explore the impact of environmental temperature exposure on eczema visits. Methods: Eczema clinic data from January 1, 2016 to December 31, 2019 were collected from the Huizhou Dermatology Hospital, and data on meteorological factors (average daily temperature and relative humidity) for the same period were derived from 86 meteorological stations of the Guangdong Provincial Climate Center. A distributed lag nonlinear model (DLNM) was used to assess the lagged effect of environmental temperature exposure on eczema, and a natural smooth spline function was used to control the nonlinear confounding of humidity. Results: There were 254 053 eczema outpatient visits at the Huizhou Dermatology Hospital within four years, with an average of 173.89 visits per day. The relationship between daily average temperature and the number of visits was non-linear (U shape). The risk of eczema increased by 2.20% (1.19%-3.21%) for every 1 ℃ decrease for the low temperature, and increased by 2.35% (1.24%-3.5%) for every 1 ℃ increase for the high temperature. The effect of high temperature was greater than that of low temperature. In all cases, 1.60% (0.44%-2.68%) of eczema outpatient visits were attributed to low temperature and the attributable number was 4 065 (1 128-6 798), while 6.33% (1.40%-10.87%) of eczema outpatient visits were due to high temperature and the attributable number was 16 082 (3 557-27 616). Conclusion: Both high temperature and low temperature are associated with increased risk of eczema.
Humans ; Air Pollution/adverse effects* ; Temperature ; Outpatients ; Cities ; Eczema/epidemiology* ; China/epidemiology* ; Air Pollutants/analysis*