Discrepancy between behavioral-indicated and perceived candidacy for HIV pre-exposure prophylaxis among men who have sex with men in Chengdu, China / 北京大学学报(医学版)

OBJECTIVE@#To explore the discrepancy between behavioral-indicated candidacy and perceived candidacy (behavioral-perceived gap) and its associated factors of human immunodeficiency virus (HIV) pre-exposure prophylaxis (PrEP) among men who have sex with men (MSM), so as to identify the focus population of PrEP interventions and to design and implement targeted interventions.@*METHODS@#We recruited a sample of 622 HIV-negative MSM who were regular clients of a community-based organization located in Chengdu, China, from November to December 2021. A cross-sectional questionnaire was used to collect the participants' information on social demographics, PrEP-related knowledge and cognitions, and risk behaviors. In this study, behaviorally eligible for PrEP was defined as performing at least one type of high-risk behavior in the past six months, including inconsistent condom use, sex with an HIV-positive partner, confirmed sexual transmitted infections (STI) diagnosis, substance use, and post-exposure prophylaxis (PEP) experience. Logistic regression models were fitted, and multivariate analyses were adjusted for social demographics.@*RESULTS@#Among the 622 eligible participants, 52.6% (327/622) were classified as behaviorally eligible for PrEP. Only 37.9% (124/327) of the participants perceived themselves as appropriate candidates for PrEP and 62.1% (203/207) had discrepancy between behavioral-indicated and perceived candidacy. 85.9% (281/327) had heard of PrEP, and 14.2% (40/281) accessed PrEP information through health care providers. Of the 327 participants eligible for behavior-indicated PrEP use, about half (47.1%) knew how to obtain PrEP medication and 33.0% had a professional PrEP counseling experience. The majority (93.3%) had no or few friends using PrEP. 54.1% scored eight or above in PrEP knowledge level. 66.7% reported having two or more sexual partners in the past six months. After adjusting for age and recruitment channel, we found six factors that were associated with perceived candidacy for PrEP, including PEP use [adjusted odds ratio (ORA)=2.20; 95% confidence interval (CI): 1.33-3.63], PrEP availability (ORA=1.69; 95%CI: 1.06-2.68), a greater number of PrEP-using friends (ORA=4.92; 95%CI: 1.77-13.65), PrEP know-ledge (ORA=2.21; 95%CI: 1.38-3.56), multiple sexual partnership (ORA=1.77; 95%CI: 1.07-2.94), and perceiving a higher risk of HIV infection (ORA=4.02; 95%CI: 1.73-9.32). Substance use during sex and PrEP information channel were not statistically associated with this beha-vioral-perceived gap.@*CONCLUSION@#We observed a high discrepancy between behavioral-indicated and perceived candidacy for PrEP among Chengdu MSM in China. Future PrEP implementation efforts should be made in skills training in assessing HIV infection risk, increasing PrEP knowledge, providing professional PrEP counselling, and fostering PrEP support environment.

Association between response to repeated negative HIV testing and risk sexual behaviors in men who have sex with men in Chengdu / 中华流行病学杂志

Objective: To investigate the association between the response to repeated negative HIV testing and the risk sexual behaviors in men who have sex with men (MSM) in Chengdu. Methods: A total of 610 MSM were recruited by convenience sampling method through Chengdu Tongle Health Consultation Service Centre from March to May 2022. Data were collected from the MSM through questionnaire survey, including the demographic characteristics, sexual behaviors in the past 6 months, the response to rerpeated negative HIV testing. Univariate and multivariate logistic regression models were conducted to analyze the association between the response to repeated negative HIV testing and risk sexual behavior. Results: A total of 579 (94.9%) participants participated in the questionnaire survey and 354 (61.1%) subjects were included in the study.For the negative HIV testing, some MSM believed that they had taken effective protection measures (17.03±2.20), some believed that they were lucky (7.50±1.87) and some believed that they were at low risk (8.87±3.62). Multivariate logistic regression model showed that protected sexual behavior was negatively associated with group sex (aOR=0.80, 95%CI: 0.67-0.95), lucky was positively associated with casual sex (aOR=1.20, 95%CI: 1.06-1.35), inconsistent condom use (aOR=1.21, 95%CI: 1.06-1.37), group sex (aOR=1.26, 95%CI: 1.00-1.60), and multiple sexual partners (aOR=1.24, 95%CI: 1.09-1.42) and low risk perception was positively associated with multiple sexual partners only (aOR=1.08, 95%CI: 1.01-1.15). Conclusions: There were high levels of recognition of protected sexual behavior and lucky dimensions in response to repeated negative HIV testing and well risk perception in MSM in Chengdu. In HIV testing and counseling services, intervention and risk warning should be strengthened in MSM who believed that they are lucky to improve their awareness of safe sex and reduce the negative effects of fluke mind.

Angiotensin-(1-7) improves endothelium-dependent vasodilation in rats with monocrotaline-induced pulmonary arterial hypertension / 生理学报

In this study, we used a rat model of pulmonary arterial hypertension (PAH) induced by monocrotaline (MCT) to investigate the role and mechanism of angiotensin (Ang)-(1-7) in regulating pulmonary artery diastolic function. Three weeks after subcutaneous injection of MCT or normal saline, the right ventricular systolic pressure (RVSP) and right ventricular hypertrophy index (RVHI) of rats were detected using a right heart catheter. Vascular endothelium-dependent relaxation was evaluated by acetylcholine (ACh)-induced vasodilation. The relaxation function of vascular smooth muscle was evaluated by sodium nitroprusside (SNP)-induced vasodilation. Human pulmonary artery endothelial cells (HPAECs) were incubated with Ang-(1-7) to measure nitric oxide (NO) release levels. The results showed that compared with control rats, RVSP and RVHI were significantly increased in the MCT-PAH rats, and both ACh or SNP-induced vasodilation were worsened. Incubation of pulmonary artery of MCT-PAH rats with Ang-(1-7) (1 × 10-9-1 × 10-4 mol/L) caused significant vaso-relaxation. Pre-incubation of Ang-(1-7) in the pulmonary artery of MCT-PAH rats significantly improved ACh-induced endothelium-dependent relaxation, but had no significant effect on SNP-induced endothelium-independent relaxation. In addition, Ang-(1-7) treatment significantly increased NO levels in HPAECs. The Mas receptor antagonist A-779 inhibited the effects of Ang-(1-7) on endothelium-dependent relaxation and NO release from endothelial cells. The above results demonstrate that Ang-(1-7) promotes the release of NO from endothelial cells by activating Mas receptor, thereby improving the endothelium-dependent relaxation function of PAH pulmonary arteries.

Status of depressive symptoms of senile cataract patients and the influence of self-perceived burden / 四川精神卫生

BackgroundElderly cataract patients with depressive symptoms have heavier self-perceived burden， and worse vision-related quality of life compared to patients without depressive symptoms， resulting in the increase of family burden. Most previous studies showed that family relationship and vision were the main factors leading to depression in elderly cataract patients， and ignored the effects of self-feeling and complicated diseases on the psychological state of elderly cataract patients. ObjectiveTo explore the relationship between depressive symptoms， self-perceived burden and postoperative vision-related quality of life in elderly cataract patients， and to analyze the risk factors of depressive symptoms. So as to provide references for targeted psychological intervention in this population. MethodsA total of 104 elderly cataract patients admitted to Jiangsu Province Hospital （The First Affiliated Hospital with Nanjing Medical University） from July 1， 2020 to December 31， 2022 were included. General information， self-perceived burden and postoperative vision-related quality of life were investigated by self-designed questionnaire， Patients' Health Questionnaire depressive Scale-9 item （PHQ-9）， Self-Perceived Burden Scale （SPBS） and National Eye Institute Visual Function Questionnaire-25 （NEI-VFQ-25）. Pearson correlation analysis was performed to analyze the correlation among PHQ-9， SPBS and NEI-VFQ-25 scores. Logistic regression analysis was used to analyze the influencing factors of depressive symptoms in eldery cataract patients. ResultsA total of 100 elderly cataract patients completed an effective questionnaire survey. Among the participants， 31 cases （31.00%） were found to have depressive symptoms. The depressive group exhibited significantly higher SPBS score （t=11.062， P<0.01） and significantly lower NEI-VFQ-25 score （t=-5.235， P<0.01） than those of the non-depressive group. Pearson correlation analysis showed a positive correlation between PHQ-9 and SPBS score （r=0.485， P<0.01）， and a negative correlation between PHQ-9 and NEI-VFQ-25 score （r=-0.440， P<0.01）. Complicated with diabetes （OR=1.441， P<0.01）， osteoarthritis （OR=1.324， P<0.05） and high SPBS score （OR=1.340， P<0.05） were risk factors of depressive sympptoms in elderly cataract patients. ConclusionThe detection rate of depressive symptoms in elderly cataract patients is higher， and postoperative vision-related quality of life in elderly cataract patients complicated with depressive symptoms is poor. Risk factors include diabetes， osteoarthritis and high self-perceived burden. ［Funded by 2022 Jiangsu Province Elderly Health Scientific Research Project （number， LKM2022019）］

Forensic Progress on Death Following Carotid Sinus Inhibition / 法医学杂志

Death after carotid sinus trauma is usually attributed to death from inhibition, a type of sudden death. Currently, the number of incidents is scarce, and related studies are few. Therefore, how to determine the involvement of carotid sinus and determine the role of diseases in the cause of death has always been a difficult point in forensic investigation. This article sorts out the research literature on carotid sinus related death at home and abroad in recent years, systematically reviews the anatomic structure of the carotid sinus nerve, the clinical epidemiology of carotid sinus syndrome, and the research on the death mechanism of carotid sinus injury at home and abroad in recent years, in order to provide references for forensic pathology research and prosecution.

Finite element analysis of the treatment of cervical spondylotic radiculopathy with three dimensional balanced manipulation / 中国骨伤

OBJECTIVE@#To explore the biomechanical characteristics of "three-dimensional balanced manipulation" for the treatment of cervical spondylotic radiculopathy(CSR).@*METHODS@#A CSR patient was treated with "three-dimensional balanced manipulation", and the mechanical changes during the manipulation were monitored by mechanical testing system. Using spiral CT to scan the neck of the patient to obtain DICOM data. The three-dimensional finite element model of cervical spondylotic radiculopathy was established by using Mimics software, Geographic Studio software. The "three-dimensional balance manipulation" was simulated and loaded, and the mechanical parameters of each part were replaced into the finite element model, and the finite element analysis was carried out by using ANSYS software to study the internal stress changes and displacement deformation of vertebral body and intervertebral disc under the action of "three-dimensional balance manipulation".@*RESULTS@#The established C-C finite element model of the CSR patient consisted of 5 vertebrae, 4 intervertebral discs and 3 ligaments, involving 153 471 nodes and 64 978 units. The stress of C-C vertebral body was mainly located in anterior and root of C spinous processes, arch, vertebral arch and the combination of the two after full loading of manipulation, and the maximum stress was 17.781 MPa. The deformation sites were mainly concentrated in articular processes and anterior transverse processes of C, superior articular processes and transverse processes of C, articular processes of C. The stress of C-C intervertebral disc mainly distributed in the anterior part of C intervertebral disc and the nucleus pulposus of C and C. The displace mentextended to the middle and posterior part of C nucleus pulposus, around the nucleus of C and C and anterior part of cervical intervertebral disc.@*CONCLUSION@#The establishment of three-dimensional finite element model of C-C cervical spondylotic radiculopathy can simulate the geometry and material properties of cervical spine, and also accurately reflects the biomechanical characteristics of cervical spine, verifys the internal mechanism of "three-dimensional balanced manipulation" on CSR, proves the safety and effectiveness of treatment, guides more standardized manipulation, and avoids medical accidents.

Detection and significance of LCN2 and PDGF-BB in serum and metastasis of lung cancer patients with bone metastasis / 临床与实验病理学杂志

Purpose To investigate the expression of lipocalin-2 (LCN2) and plateled derived growth factor-BB (PDGF-BB) in serum,carcinoma and bone metastases of lung cancer patients. Methods Protein chip were used to screen the differential expression of cytokines in serum of 19 lung cancer patients (9 patients with bone metastasis and 10 patients freedistant metastasis) . Immunohistochemistry was performed to assess the differential expression of LCN2 and PDGF-BB cytokines in 12 cases of primary lung cancer without distant metastasis and 12 cases of primary lung cancer with only bone metastasis. Results Serum level of lipid transport factor (LCN2) and PDGFBB in non-small cell lung cancer patients with bone metastasis were significantly higher than that without distant metastasis(P< 0. 05) . There was no difference cytokines between small cell lung cancer patients with bone metastasis and without metastasis group (P > 0. 05) . The results of immunohistochemistry showed that high expression of LCN2 and PDGF-BB in bone metastasis tissues was significantly higher than that in primary lung cancer tissues. Conclusions High expression of LCN2 and PDGF-BB in serum and bone metastasis tissue of patients with non-small cell lung cancer might be involved in the occurrence,development of bone metastasis of lung cancer in the bone marrow,may be an important biomarker and potential therapeutic target for bone metastasis of lung cancer.

Infrared Spectral Characteristics of Electrical Injuries on Swine Skin Caused by Different Voltages Based on Machine Learning Algorithms / 法医学杂志

Objective To explore infrared spectrum characteristics of different voltages induced electrical injuries on swine skin by using Fourier transform infrared-microspectroscopy (FTIR-MSP) combined with machine learning algorithms, thus to provide a reference to the identification of electrical skin injuries caused by different voltages.Methods Electrical skin injury model was established on swines.The skin was exposed to 110 V, 220 V and 380 V electric shock for 30 s and then samples were took, with normal skin tissues around the injuries as the control.Combined with the results of continuous section HE staining, the FTIR-MSP spectral data of the corresponding skin tissues were acquired.With the combination of machine learning algorithms such as principal component analysis (PCA) and partial least squares-discriminant analysis (PLS-DA), different spectral bands were selected (full band 4 000-1 000 cm-1and sub-bands 4 000-3 600 cm-1, 3 600-2 800 cm-1, 2 800-1 800 cm-1, and 1 800-1 000 cm-1), and various pretreatment methods were used such as orthogonal signal correction (OSC), standard normal variables (SNV), multivariate scatter correction (MSC), normalization, and smoothing.Thus, the model was optimized, and the classification effects were compared.Results Compared with simple spectrum analysis, PCA seemed to be better at distinguishing electrical shock groups from the control, but was not able to distinguish different voltages induced groups.PLS-DA based on the 3 600-2 800 cm-1band was used to identify the different voltages induced skin injuries.The OSC could further optimize the robustness of the 3 600-2 800 cm-1band model.Conclusion It is feasible to identify electrical skin injuries caused by different voltages by using FTIR-MSP technique along with machine learning algorithms.

Design and application of pottery frame for warm acupuncture moxibustion / 医疗卫生装备

Objective To develop a pottery frame to facilitate warm acupuncture moxibustion.Methods The frame was made of clay,and was composed of a moxa wool retaining table,a handle,a base and a support.The moxa wool holding table had a hollow structure wide at the top and narrow at the bottom,and there was a slot at its middle to hold the needle;while the base had a hollow structre narrow at the top and wide at the bottom,and there were several air vents at its inner wall to accelerate the full combustion of the moxa wool.Results The frame avoided patient burn due to dropped spark or overweight moxa cone during traditional warm acupuncture moxibustion therapy, and relieved the patients' pain and medical staffs' workload. Conclusion The frame has simple structure, easy operation, high safety, high patient satisfaction and high practicability.

Effect of ropivacaine combined with bilateral thoracic paravertebral nerve block on surgical rehabilitation in cardiopulmonary bypass heart valve surgery / 临床麻醉学杂志

Objective To observe the effect of ropivacaine on bilateral posterior thoracic paravertebral nerve block for cardiopulmonary bypass.Methods A total of 142 patients undergoing elective cardiac valve surgery,68 males and 74 females,were randomly divided into two groups:group C (general anesthesia,n =69) and group P (general anesthesia+ paraverteral nerve block with ropivacaine,n=73).The changes of hemodynamics,BIS,anesthesia dose and postoperative anesthesia were observed before and after anesthesia,the time of mechanical ventilation,the duration of vasoactive drug support,ICU stay time,length of stay and hospitalization costs were recorded.Results Compared with group C,heart rate and blood pressure were more stable in group P,and the dosage of sufentanil was less [(130.6±5.0) μg vs (202.8±7.4) μg,P＜0.01],the patient was awakened quickly [(241.0±15.8) min vs (417.6±38.9) min,P＜0.05],and the time of mechanical ventilation [(466.0±22.9) min vs (657.8±49.4) min,P＜0.05] and ICU residence time [(22.1±1.0) h vs (34.1±3.6) h,P＜0.05] were shortened,the cost of hospitalization decreased [(72 360±1 565) yuan vs (78 420±2 094) yuan,(P＜0.05)].Conclusion Thoracic paravertebral nerve block anesthesia combined with general anesthesia is better than pure general anesthesia,in terms of maintaining intraoperative circulation stability,reducing the amount of anesthetic analgesic drugs,and early recovery of patients after surgery.

Research progress on the effects of alcohol on traumatic brain injury / 中国法医学杂志

Alcohol exposure Often observed in the process of traumatic brain injury (TBI), which is closely related to the death of traumatic brain injury. At home and abroad this area research is complex. This paper summarizes the relevant domestic and foreign experimental studies in recent ten years, from the clinical experimental study, animal model application, brain damage identification and other aspects of different serum alcohol levels (BAC) on the impact of brain injury related research progress. This review provides a reference for further research at first, it also has reference for the identification of related deaths.

Therapeutic effects of submucosal tunneling endoscopic resection on large esophageal submucosal tumors originating from muscularis propria layer / 中华消化内镜杂志

Objective To estimate the safety and efficacy of submucosal tunneling endoscopic resection (STER) on treatment of large esophageal submucosal tumors (SMTs) originating from muscularis propria layer.Methods The data of patients with large esophageal SMTs (diameter ≥ 3.5 cm) undergone STER (n=17) or endoscopic submucosal dissection (ESD,n =15) at the Endoscopy Center of Tianjin Medical University General Hospital from December 2009 to March 2016 were retrospective analyzed.The therapeutic effects,hospitalization times,post-operation expenses,and occurrence of complications were evaluated and compared between the two groups.Results All the endoscopic treatments of the 32 patients were successfully completed.The operating time of the STER group was significantly longer than that of the ESD group (t =2.595,P =0.015).There was no statistical difference on the en bloc resection rate,complete resection rate and complication rate between STER group and ESD group (P＞0.05).The mean post-operative hospital stay of the STER group was significantly less than that of the ESD group (3.8± 1.0days VS 6.7±1.8 days,t=5.644,P=0.000).The mean hospital cost of the STER group was significantly less than that of the ESD group (22 456.1±5 232.0 yuan VS 27 392.5±5 747.9 yuan,t =2.543,P =0.016).The wound healing rates at 1 month after operation in the STER group was significantly higher than that of the ESD group [94.1％ (16/17) VS 20.0％ (3/15),P=0.000].No recurrence and metastasis occurred in the STER group and ESD group during the 41.2±20.6 months follow-up.Conclusion STER is a safe and effective technique for treating large esophageal SMTs originating from the muscularis propria layer,with earlier wound healing,shorter hospital stay and lower cost compared with those of the traditional method of ESD.

Information Visualization Analysis of Transitional Care Home and Abroad / 中国康复理论与实践

Objective To analyze the trend of transitional care in recent ten years and to find the advantages and shortages in this field between home and abroad, so as to provide reference for nursing researchers in China. Methods The literatures about transitional care pub-lished from January, 2005 to August, 2016 from Web of Science and CNKI were retrieved, and the visualizing map was drawn by operating CiteSpaceⅡ. Results The annual number publication of transitional care steadily increased in the world in recent ten years. China issued a small amount of documents before 2012, and then the research of transitional care obviously increased, while the number was comparable to the international in 2015. USA played a leading role in the field;China issued only 2%of the total, ranking the 9th. By comparing domestic and foreign research hot topics, international transitional care studies paid more attention to nursing program and the effect, while China fo-cused on the research of the disease. Research frontier showed that international transitional care service expanded to more and more sub-jects gradually, and inclined to the continuation of management, community and family support nursing research, which was relatively lack in China. Conclusion In recent years, the research of transitional care received increasing attention in China, while the depth and breadth of study was still lacking. China should learn from foreign research hot topics and frontiers to explore transitional care system, and provied pa-tients discharged nursing support and self care knowledge, to enrich high quality nursing connotation.

Mechanism of Non-receptor Tyrosine Kinase Src Regulating Neuroinflammation Through Phosphatase and Tensin Homology Protein in Microglia / 中国医学科学院学报

Objective To investigate the mechanism of non-receptor tyrosine kinase Src regulating neuroinflammation through phosphatase and tensin homology protein(PTEN)in microglia. Methods BV2 cells were incubated with PTEN inhibitor bpv(HOpic)for 2 hours,and then added with lipopolysaccharide(LPS)to induce neuroinflammation,Western blot was performed to determine the expression of phosphorylated protein kinase B(Akt)to investigate the activity of PTEN. Enzyme-linked immunosorben assay(ELISA)was used to determine the release of tumor necrosis factor α(TNF-α)to assess neuroinflammation.After PTEN inhibitor or Src specific small interfering RNA was added,the change of neuroinflammation was evaluated to study the mechanism of Src regulating neuroinflammation. Results LPS induced significant neuroinflammation in BV2 cells,as indicated by significantly increased expression of p-Akt and release of TNF-α(P<0.001).The PTEN inhibitor signficantly increased Akt phosphorylation(P<0.05)and TNF-α release(P<0.001)in LPS-induced BV2 cells compared to simply LPS-induced cells.The Src small interfering RNA significantly decreased the release of TNF-α(P<0.001)and inhibited PTEN(P<0.001)and Akt(P<0.001)phosphorylation. Conclusion Src kinase may regulate neuroinflammtion response in BV2 cells by regulating the phosphorylation of PTEN.

Microglial Phagocytosis in the Neurodegenerative Diseases / 中国医学科学院学报

Microglia are the resident innate immune cells in the brain. Under endogenous or exogenous stimulates, they become activated and play an important role in the neurodegenerative diseases. Microglial phagocytosis is a process of receptor-mediated engulfment and degradation of apoptotic cells. In addition, microglia can phagocyte brain-specific cargo, such as myelin debris and abnormal protein aggregation. However, recent studies have shown that microglia can also phagocyte stressed-but-viable neurons, causing loss of neurons in the brain. Thus, whether microglial phagocytosis is beneficial or not in neurodegenerative disease remains controversial. This article reviews microglial phagocytosis related mechanisms and its potential roles in neurodegenerative diseases, with an attempt to provide new insights in the treatment of neurodegenerative diseases.

A survey on respiratory infectious diseases related health literacy and health behavior in Fengtai district, Beijing / 中华预防医学杂志

<p><b>OBJECTIVE</b>This study aims to survey respiratory infectious disease related health literacy (RIDHL) and health behavior (RIDHB) among residents in Fengtai district, Beijing, analyze impact factors of RIDHL , explore the association between RIDHL and RIDHB.</p><p><b>METHODS</b>Multistage sampling was employed and 1100 respondents were surveyed by self-designed questionnaires, which including social-demographic characteristics and evaluation of RIDHL and RIDHB. The survey results were described, the impact factors of RIDHL and the association between RIDHL and RIDHB were analyzed by analysis of variance or covariance.</p><p><b>RESULTS</b>A total of 998 qualified questionnaires were recollected with the effective rate of 90.7%. The respondents aged from 15 to 65, scored (71.3 +/- 19.0) points in RIDHL test. Of those respondents, 25.7% (256/998), 43.2% (432/998) and 31.1% (310/998) were evaluated as low( <60 points), medium (60 - 85 points), and high level ( > 85 points) of RIDHL, respectively. There were significant difference in RIDHL scores between registered and non-registered residents, who scored (74.1 +/- 18.9) and (68.4 +/- 18.8) points, respectively (P < 0.01). RIDHL sections were ranked as audiovisual (77.6%, 4647/5988), internet using (75.2%, 2251/2994), reading (74.6%, 3724/4990), map using (68.3%, 4090/5988) and quantitative (65.5%, 5230/7984) according to the accurate rates from high to low. Analysis of variance or covariance showed that RIDHL scores were significantly different among respondents with different ages, nationalities, educational levels, occupations, and incomes (P < 0.01), yet no significant differences among those with different genders and marital status (P > 0.05). Respondents scored (69.7 +/- 15.5) points in RIDHB test. The RIDHB scores ((64.5 +/- 15.0), (70.4 +/- 15.6), (72.5 +/- 14.9) points, respectively) increased among residents with low, medium and high level of RIDHL (P < 0.01).</p><p><b>CONCLUSION</b>Residents in Fengtai district, Beijing possessed medium level of RIDHL. The non-registered residents showed lower RIDHL than registered residents. Ages, nationalities, educational levels, occupations, and incomes were impact factors of RIDHL. People with higher level of RIDHL also showed a higher level of RIDHB.</p>

Effects of exposure to extremely low frequency electromagnetic fields on reproduction of female mice and development of offsprings / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To observe the effects of exposure to extremely low frequency electromagnetic fields (ELF EMFs) on pregnant mice and development of offsprings.</p><p><b>METHODS</b>Female mice were exposed to 50 Hz, 1.2 mT electromagnetic fields during the whole pregnant period (8 h/d). The body weight of dams, delivery and development of offsprings were observed and measured.</p><p><b>RESULTS</b>The increase of body weight of exposed dams (29.0%) was significantly slower than that of the control group (47.8%) during late pregnancy period (P < 0.05). The producing rate of exposed group was 60% of that of control group. Miscarriage, fetal loss and externally malformed fetus appeared in exposed group. The average number of offsprings of each exposed mouse was significantly decreased (11 +/- 1.6 vs 7 +/- 2.0, P < 0.05) and 11 for control group. Regarding the development of offspring, the body weight of prenatally exposed offsprings was increased more slowly than that of the control in the first two weeks after birth (P < 0.05). Developmental manifestations including eye opening [(252 +/- 24) h] and tooth eruption [(336 +/- 19) h] presented later in exposed offspring [(226 +/- 12), (319 +/- 15) h, respectively] (P < 0.05).</p><p><b>CONCLUSION</b>Exposure to ELF EMFs during pregnancy period can cause adverse effects on pregnancy of female mice and development of offsprings.</p>

Curative effect of interleukin 11 on chronic idiopathic thrombocytopenic purpura / 中国实验血液学杂志

The aim of this study was to investigate the circulating levels of IL-11 in the patients with chronic idiopathic thrombocytopenic purpura (CITP), and its significance, and to evaluate the curative effect of rhIL-11 on CITP. The level of IL-11 in patients with CITP was determined by ELISA before and after treatment, respectively. 1.5 mg of rhIL-11 were injected subcutaneously, once a day, continuously for 14 days as one course, treatment time 1 - 2 courses as total. The results showed that the higher blood IL-11 level was found in CITP patients than that in controls (P < 0.01) and during the course of treatment the number of platelets in peripheral blood of patients with CITP parallelled to the level of IL-11. The platelet counts were obviously increased in all CITP patients after rhIL-11 treatment. It is concluded that the serum level of IL-11 in patients is correlated to the number of platelets in patients. rhIL-11 can be used as an effective treatment for CITP.