Study on genotype-associated HPV infection in cervical lesions / 中华疾病控制杂志

Objective To explore the association of genotypes of human papillomavirus (HPV) with cervicitis, cervical intraepithelial neoplasia (CIN) and carcinoma in situ of cervix. Methods A total of 464 patients with cervical biology admitted to Hefei women and child health care hospital from October, 2014 to October, 2015 were selected. Among them, there were 242 cases of cervicitis, 222 cases of CIN (76 of group Ⅰ, 71 of group Ⅱ, and 66 of group Ⅲ), and 9 cases of cervical cancer. Hybrid chip technology was used to detect cervical secretions of patients, and 21 kinds of HPV DNA were typed according to histopathological biopsy. Results The HPV infection was found in 464 patients with cervical lesions. Among them, 354 cases (76.3%) had HPV infection with 232 cases (65.5%) of single HPV infection and 122 cases (34.5%) of multiple infections included. The rate of HPV infection was 64.9% in the group of cervicitis, while the rate was 86.8% in group I of CIN and in group II of CIN, the rate of HPV infection was 87.3%. Surprisingly, the HPV infection rate in group III of CIN was as high as 90.9%. The infection rate of HPV in the patients with CIN was significantly higher than those with cervicitis (P<0.001). All patients with cervical cancer were infected with HPV. Conclusions Persistent infection of high-risk HPV subtypes increases the hazard of cervical tumor and CIN. Therefore, genotyping of HPV DNA is helpful for screening and prediction of cervical cancer.

Recommendations for acupuncture in clinical practice guidelines of the national guideline clearinghouse / 中国结合医学杂志

<p><b>OBJECTIVE</b>To organize the clinical practice guidelines (CPGs) related to acupuncture included in the National Guideline Clearinghouse (NGC) to systematically summarize the diseases and disorders most commonly treated with acupuncture, the strength of recommendations for acupuncture and the quality of evidence.</p><p><b>METHODS</b>The NGC database was systematically searched for guidelines that included acupuncture as an intervention. Two independent reviewers studied the summaries and the full texts of the guidelines and included guidelines based on the inclusion and exclusion criteria. Thirty-nine guidelines were collected with 80 recommendations. The Appraisal of Guidelines for Research and Evaluation (AGREE) II instrument was used to assess the quality of these guidelines.</p><p><b>RESULTS</b>Of the 80 recommendations on acupuncture, 49 recommendations were clearly for acupuncture, 25 recommendations were against acupuncture and 6 recommendations did not indicate any clear recommendations, 37 recommendations were for painful diseases/disorders, and 12 recommendations were for non-painful diseases/disorders. Locomotor system disorders were the most common in the painful diseases/disorders category. Out of all the recommendations for acupuncture, most recommendations (87.76%) were weak in strength, and most of the evidence (40.84%) was of low quality.</p><p><b>CONCLUSIONS</b>In the National Guideline Clearinghouse, the recommendations for acupuncture focus on painful diseases/disorders. The recommendations in the guidelines are not high in strength, and most of the evidence is moderate or low in quality.</p>

Association of HSP90B1 gene polymorphisms with systemic lupus erythemat-osus patients / 中国免疫学杂志

Objective:To explore the association of HSP90B1 gene polymorphisms with susceptibility of systemic lupus erythematosus(SLE) in Chinese Han population.Methods: We recruited 360 SLE patients from hospital as case group and selected 360 age- and sex-matched individuals without autoimmune diseases as control group.Multiplex SNaPshot was used for genotyp-ing.Benjamin-Hamburg(BH) method based on false discovery rate(FDR) standard was used for multiple testing correction.Results:The rs1165681 polymorphism(Crude OR=0.621,95% CI=0.450-0.856,P=0.004;Adjusted OR=0.619,95% CI=0.449-0.855,P=0.004) was significantly associated with SLE risk reduction in dominant model,and the rs10778306 polymorphism(crude OR=0.568, 95% CI=0.328-0.984,P=0.044;Adjusted OR=0.570,95% CI=0.329-0.988,P=0.045) and the rs2722188 polymorphism(Crude OR=0.227,95% CI=0.076-0.681,P=0.008;Adjusted OR=0.227,95% CI=0.076-0.682,P=0.008) were significantly associated with SLE risk reduction in recessive model.After adjustment using BH method,genotype distribution of rs1165681 was statistical difference in two groups(PBH= 0.044).Significant associations were found between four haplotypes of HSP90B1 gene CCATTAGGCAT (OR=0.323,95% CI=0.154-0.680,P=0.002),CCCTTAGGCAC(OR=1.324,95% CI=1.014-1.729,P=0.039),TCCCTAGTCGC (OR=0.465,95% CI=0.221-0.979,P=0.039)and TTCTCGGGCAT(OR=0.443,95% CI=0.224-0.875,P=0.016)and SLE risk.After adjustment using BH method,the frequency of CCATTAGGCAT distribution difference was statistically significant in two groups(PBH= 0.028),but there were no statistical difference in other haplotypes frequency distributions (P>0.05).Conclusion:HSP90B1gene polymorphisms may be associated with the susceptibility of SLE in Chinese Han population.

Application of cell lineage reprogramming for central nervous system injury and repair / 第二军医大学学报

Transplantation of neural stem cells (NSCs) has become an important therapeutic strategy for central nervous system (CNS) injury; however, the potential immune rejection and ethical concerns limit the transplantation-based cell therapy in clinic. Alternatively, induced pluripotent stem cells (iPSCs) may overcome these major hurdles and cast new lights on cell therapy. Recent studies have shown that a variety of somatic cells from mouse or human can be reprogrammed into NSCs or neurons, suggesting that reprogramming of cell fate may represent a promising strategy for CNS repair. Here, we reviewed the current knowledge of cell lineage reprogramming, reprogramming-mediated induction of NSCs or neurons and their application in CNS repair.

Structural, mechanistic and functional insights into topoisomerase II / 生理学报

Topoisomerases are nuclear enzymes that regulate the overwinding or underwinding of DNA helix during replication, transcription, recombination, repair, and chromatin remodeling. These enzymes perform topological transformations by providing a transient DNA break, through which the unique problems of DNA entanglement that occur owing to unwinding and rewinding of the DNA helix can be resolved. In mammals, topoisomerases are classified into two types, type I topoisomerase (Top1) and type II topoisomerase (Top2), depending on the number of strands cut in one round of action. Top1 induces single-strand breaks in DNA, and Top2 induces double-strand breaks. In cells from vertebrate species, there are two forms of Top2, designated alpha and beta. Top2α is involved in the cellular proliferation and pluripotency, while Top2β plays key roles in neurodevelopment. In this review, we cover recent advances in structural, mechanistic and functional insights into Top2.

Surgical treatment for chronic achilles tendon rupture and severe scarring / 中国骨伤

<p><b>OBJECTIVE</b>To evaluate the clinical efficacy of autologous semitendinosus and gracilis tendon grafting with anchor repair for the treatment of chronic achilles tendon rupture and severe scarring.</p><p><b>METHODS</b>From April 2010 to October 2012,26 patients with chronic achilles tendon rupture(with Myerson type III ) and severe scarring were treated with autologous semitendinosus and gracilis tendon grafting with anchor repair. There were 19 males and 7 females,with an average age of 32 years old (ranged, 22 to 47 years). The time from injury to surgery was from 3 to 12 months (7 months on average). The plantar flexion strength of all injuried feet attenuated and single heel rise test were positive in 26 cases before operation. Plaster immobilization and routine rehabilitation therapy were performed after operation. Clinical effects were evaluated by Arner-lindholm criterion and complications were observed after operation.</p><p><b>RESULTS</b>All the patients were followed up from 12 to 24 months with a mean of 16 months. No complications such as achilles tendon re-rupture, wound infection, etc were found during follow-up period. According to the Arner-Lindholm standard, 15 cases got excellent results and 11 good.</p><p><b>CONCLUSION</b>Using autologous semitendinosus and gracilis tendon grafts with anchor repair to treat chronic achilles tendon rupture and severe scarring is a perfect surgical procedure.</p>

Math1 gene therapy for kanamycin and furosemide-induced deaf guinea pigs / 中华耳鼻咽喉头颈外科杂志

<p><b>OBJECTIVE</b>To observe the morphology and function changes of cochlear hair cells before and after math1 gene injection into the cochlea of deaf guinea pigs which were induced by kanamycin and furosemide. To explore the feasibility of Math1 gene for medicine-induced deafness therapy.</p><p><b>METHODS</b>Kanamycin (500 mg/kg) and furosemide (50 mg/kg) were given to the healthy adult guinea pigs intramuscularly and intravenously to establish the deafness model. The guinea pigs whose auditory brainstem response (ABR) threshold > 95 dB SPL were randomly divided into five groups. Blank control group (without any treatment, n = 3), operation control group (right ear scala tympani operation, n = 3), artificial perilymph group (right ear scala tympani injection artificial perilymph, n = 3), virus vector group [right ear scala tympani injection adenovirus which carrying enhanced green fluorescent protein (EGFP) gene (Ad. EGFP) , n = 4], Math1 gene therapy group [right ear scala tympani injection adenovirus which carrying Math1 and EGFP gene (Ad. Math1-EGFP), n = 6]. Each animal received ABR test before and after injection. The cochlear tissue was observed by scanning electronic microscopy.</p><p><b>RESULTS</b>The ABR thresholds of tone burst( 4, 8, 16, 20 kHz ) were not statistically significant in different groups (P > 0.05). The number of hair cells increased in some of severe deaf guinea pigs after the injection of Ad. Math1-EGFP gene. However, there was no obvious difference with morphology and numbers of cochlea hair cells in other groups.</p><p><b>CONCLUSIONS</b>The injection of Math1 gene to cochlea can regenerate or repair the hair cells of medicine-induced deaf guinea pigs, but there was no improvement on the hearing loss.</p>

Medical treatment following successful separation of thoracopagus conjoined twins / 中华儿科杂志

<p><b>OBJECTIVE</b>To analyze and summarize the medical treatment experience following separation of thoracopagus conjoined twins.</p><p><b>METHOD</b>The clinical manifestations and the medical therapy of a pair of thoracopagus conjoined twins were analyzed. The conjunction of the female twins was from 5 cm above the nipple to the umbilicus. They also suffered from complex congenital heart diseases. At the 17th day of their lives, they were surgically separated. One girl died after the operation, the other survived but experienced heart failure, sepsis and multiple organ dysfunction (including liver, blood and kidney et al). In order to protect or maintain the main organ function, the vital signs and the objective indexes were monitored continually, such as blood routine test, C reactive protein, hepatorenal function, bacterial culture, and galactomannan test, blood gas analysis and chest radiogram.</p><p><b>CONCLUSION</b>It is important to protect the main organ function and prevent or control infection. The early surgical correction of congenital heart disease may contribute to recovery of the children.</p>

A study of 22 displaced intraarticular calcaneal fractures using locking plates with and without bone graft / 中国骨伤

<p><b>OBJECTIVE</b>To analyze locking plates with bone graft fusion in treating displaced intraarticular calcaneal fractures and determine whether it is beneficial in maintaining restoration of calcaneal height and anatomic reduction of the articular surface.</p><p><b>METHODS</b>From January 2007 to January 2008, 22 patients with displaced intraarticular calcaneal fractures were treated with locking plates with and without bone graft (divided into the bone graft group and non-bone graft group). There were 17 males and 5 females, ranging in age from 18 to 59 years with the mean of 35 years. Sanders III was in 14 cases and Sanders IV in 8 cases. Autologous iliac bone filled defects with locking plates fixation for the bone graft group; just locking plates fixation were performed for non-bone graft group. The Böhler angle and Gissane angle were measured before and after operation. The foot function of two groups were compared according to Maryland standard at the 6th month, 1, 2 years after operation.</p><p><b>RESULTS</b>All patients were followed up with an average of 25 months. There was no significant difference in the recovery of Böhler angle and Gissane angle between two groups (P > 0.05). After the 6 months,1, 2 years, there was no significant difference in the foot function between two groups (P > 0.05), in bone graft group, excellent result was in 6, 7 ,7 cases respectively; and in non-bone graft group, excellent results in 5, 6, 7 cases respectively.</p><p><b>CONCLUSION</b>Bone graft in the surgical treatment of calcaneal fractures is not an advantage.</p>

Study on the mechanism of action of total flavonoids of Litsea coreana for reducing blood glucose level in rat with type 2 diabetes mellitus / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To explore the possible mechanism of total flavonoids of Litsea coreana (TFLC) on reducing blood glucose level in rat with type 2 diabetes mellitus (T2DM).</p><p><b>METHODS</b>Male SD rats of T2DM allocated in two groups were treated with 400 mg/kg TFLC or metformin respectively via gastrogavage for 6 weeks. Blood routine biochemical indices in rats were measured; pathology of rats' liver was examined with HE stain under transmission electron microscopy; levels of malondialdehyde (MDA) and superoxide dismutase (SOD) in liver homogenate were determined, and the expression of protein tyrosine phosphatase 1B (PTP1B) in liver was detected using RT-PCR at the terminal of the experiment.</p><p><b>RESULTS</b>Biochemical measuring showed that the glucose tolerance of rats after treatment was markedly improved in both groups. Meantime, levels of fast blood glucose (FBG), glycohemoglobin (HbA1c), fast blood insulin (FINS), free fatty acid (FFA), total cholesterol (TC), triglyceride (TG) and low density lipoprotein-cholesterol (LDL-C), as well as MDA level in liver were decreased, while levels of high density lipoprotein-cholesterol (HDL-C) in blood and SOD in liver were significantly increased in both groups after treatment, showing insignificant difference between two treatment groups. Light microscopic examination showed markedly fatty degeneration of liver, and electron microscopic examination found mitochondria swelling and endoplasmic reticulum breakage in liver of T2DM rats, but these changes were ameliorated to some extent after treatment. The elevated PTP1B expression in liver of T2DM rats was decreased in the TFLC treated group, but unchanged in the metformin treated group.</p><p><b>CONCLUSION</b>TFLC can significantly decrease the blood levels of glucose and lipid and ameliorate oxidation stress in liver; its mechanism of action in improving insulin resistance might be related with its suppression on PTP1B expression in rat's liver to enhance the insulin signaling pathway.</p>

Changes of pathologic feature and microtubulin associated protein 2 in nervous system of hens with organophosphate-induced delayed neuropathy induced by 2,4,6-trimethylbenzoyl phenylphosphonate / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To develop the organophosphate-induced delayed neuropathy (OPIDN) hen model with 2,4,6-trimethylbenzoyl phenylphosphonate (TOCP), and observe the change of pathology and investigate the alterations of microtubulin associated protein 2 (MAP2).</p><p><b>METHODS</b>48 adult hens were randomly divided into four groups, including three experimental groups and control group (n = 12 each group). The hens in three experimental groups were treated with TOCP by gavage at single dosages of 250, 500 and 750 mg/kg respectively while the control hens received an equivalent volume of corn oil by gavage. All hens were sacrificed after 21 days of treatment. Half hens in each group were dissected for HE examination and myelin straining of brain, spinal cord and sciatic nerve while brains of another half hens were dissected for the determination of MAP2 by western blotting.</p><p><b>RESULTS</b>The delayed neurotoxicity symptoms of hens both in 500 and 750 mg/kg groups were consistently observed. The pathological changes of brain, spinal cord and sciatic nerve in 500 and 750 mg/kg groups showed nerve cells difference necrosis, increased cytoplasm basophilia, microglia proliferation, mono-nuclear and lymphocyte infiltration, myelin sheath extensive up to part of them disaggregation deletion. Compared with the control group, at 500 and 750 mg/kg respectively the increase of MAP2 was 25% and 23% (P < 0.01 and P < 0.05).</p><p><b>CONCLUSIONS</b>The histopathologic changes of OPIDN caused by TOCP have dose-response relationship. The changes of MAP2 in nervous system may contribute to the occurrence and development of TOCP induced delayed neurotoxicity.</p>

Study on malignant transformation of human bronchial epithelial cells induced by glycidyl methacrylate / 中华预防医学杂志

<p><b>OBJECTIVE</b>To study the malignant transformation of human bronchial epithelial cells induced by glycidyl methacrylate (GMA).</p><p><b>METHODS</b>16HBE cells were treated multiple times with GMA at concentrations of 1, 2, 4 and 8 microg/ml. Cellular biological characteristics of malignant transformation were identified by the tests of conA, colony forming frequency on soft agar, scanning electron microscope and tumorigenesis in nude mice. Test of immunocytochemical detection was also applied to confirm the derivation of cell and tumor. Groups of solvent control (DMSO) and positive control (MCA) were also performed at the same time.</p><p><b>RESULTS</b>Transformed foci could be observed after the cells were treated by GMA at concentrations from 1 to 8 microg/ml. The number of transformation foci increased with the concentration of GMA. Transforming rate in 8 microg/ml group (8.48 x 10(-6)) was significantly higher (P < 0.01) than that of solvent control group (4.5 x 10(-7)). The transformed cells lost contact inhibition and exhibited a crossover growth in culture dish. They also could grow in semi-solid agar and showed dose-reaction relations with the concentration of GMA. The colony forming frequency in 2, 4 and 8 microg/ml group was 1.20 per thousand, 2.35 per thousand and 5.70 per thousand respectively, which were higher than that of solvent control group (P < 0.01). The transformed cells could be agglutinated by low concentration of conA. Microvilli on the surface of transformed cells increased and became strong and long under scanning electron microscope. The transformed cells could form subcutaneous tumor in nude mice which was diagnosed as squamous cell carcinoma in morphology. Expression of cytokeratin (CK) was detected in both 16HBE cells and tumor formed in nude mice.</p><p><b>CONCLUSION</b>GMA could induce the malignant transformation of 16HBE cells. This research system might provide a potential tool and lay a foundation for the study of the molecular mechanism of carcinogenesis induced by GMA.</p>

Experimental study on protective effects of HupA in the treatment of isocarbophos poisoning / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To investigate the therapeutic and prophylactic efficiency of HupA in mice with acute isocarbophos poisoning, and the protective effects of the HupA on AChE inhibited by isocarbophos.</p><p><b>METHODS</b>Mice were randomizedly divided into the non-treatment group, the atropine control group, the HupA treatment group and the atropine and HupA combined treatment group. Toxic signs and survival rates were observed and compared among these groups. The AChE activity was monitored in the whole blood, the red cells and brain tissue exposed to isocarbophos in the either treated with HupA or non-treated groups.</p><p><b>RESULTS</b>In HupA treatment group compared with the non-treatment group, toxic signs were significantly decreased and the survival rate was increased. The therapeutic efficiency in the atropine and HupA combined treatment group was better than other groups. After isocarbophos was administered, the AChE activity in the HupA treatment group and the non-treatment group was decreased. However, the AChE activity in the whole blood (1.096 +/- 0.111), (1.262 +/- 0.146), (1.181 +/- 0.353) U/ml, the red cells (0.798 +/- 0.063), (1.000 +/- 0.176), (0.837 +/- 0.331) and the brain tissue (13.739 +/- 2.970), (18.507 +/- 3.466), (10.764 +/- 2.212) U/g in HupA treatment group 0.5, 1 and 2 hours after isocarbophos was administered was significantly higher than those in the non-treatment group (P < 0.05 or P < 0.01).</p><p><b>CONCLUSION</b>HupA has therapeutic effect on mice with acute isocarbophos poisoning. The protective effect of HupA on blood and brain AChE inhibited by isocarbophos may be one of the mechanisms of the therapeutic effect of HupA in acute Isocarbophos poisoning.</p>

Isolation and physiological characteristics of a premature senescence mutant in rice (Oryza sativa L.) / 浙江大学学报（英文版）（B辑：生物医学和生物技术）

A rice pse(t) (premature senescence, tentatively) mutant line, was isolated from 4,500 independent T-DNA inserted transgenic lines. The symptoms of premature senescence appeared more severely than those of the control plants (Zhonghua 11, japonica) at the last development stage. To characterize the mutant and provide basic information on the candidate genes by mapping to a physical region of 220-kb, experiments were carried out in two phytotrons under controlled temperature of 24 degrees C and 28 degrees C, respectively. The content of chlorophyll, soluble protein and MDA (malondialdehyde), net photosynthesis, the antioxidant enzyme activities of SOD (superoxide dismuase) (EC 1.15.1.1) and POD (peroxidase) (EC 1.11.1.7) and the peptidase activities of leaves were measured from top to bottom according to the leaf positions at the flowering stage. Compared with the control plant, the mutant showed the following characteristics: (1) Higher net photosynthesis rate (P(n)) appeared in the 1st and 2nd leaves, contents of chlorophyll and soluble protein were also higher in the 1st leaf; (2) The activities of SOD, POD and peptidase were higher according to the leaf position from top to bottom; (3) The symptom of premature senescence was accelerated in the mutant at 28 degrees C treatment. The MDA content and the SOD and POD activities between the 24 degrees C and 28 degrees C treatment mutants were not significantly different. Content of chlorophyll and soluble protein of leaves mutant decreased rapidly at 28 degrees C treatment. The results show that pse(t) is sensitive to high temperature. The probable function of PSE(T) is discussed.

Clinical characteristics of alternating hemiplegia of childhood in 13 patients / 中华儿科杂志

<p><b>OBJECTIVE</b>To summarize the clinical characteristics of alternating hemiplegia of childhood (AHC).</p><p><b>METHODS</b>The clinical data of 13 children with AHC were analyzed. Cranial MRI, EEG, analysis of serum amino acids and urinary organic acids, measurement of plasma lactate and pyruvate levels were done in all patients. Other laboratory examinations such as magnetic resonance angio-imaging (MRA), digital subtraction arteriography (DSA) and Video-EEG were also performed in some patients.</p><p><b>RESULTS</b>Of the 13 patients, 12 were male, and 1 was female. The age of onset was from 2 days to 55 months (average 13.1 months). The initial symptoms were abnormal ocular movements (AOMs) consisting of ocular deviation, gaze or nystagmus in 2 cases, AOMs and dystonic posturing in 9 cases, hemiplegia in 2 cases. All patients had recurrent alternating hemiplegic episodes. The hemiplegic attacks lasted from a few minutes to 10 days. The occurrence of the attacks ranged from 8 times daily to one time every 2 months. In 10 patients the abnormal eye movements or dystonic posturing, at times, recurred intermittently during the hemiplegic attack. Choreoathetosis was present in 2 cases. Ataxia was present in 1 case; 7 patients also had the episodes of quadriplegia. During the episodes of quadriplegia, dysarthria or aphasia was present in 4 cases, dyspnea and dysphagia was present in 2 cases, respectively. Sleep could relieve both weakness and associated paroxysmal symptoms. Mental retardation was present in 9 cases, seizures in 3 cases. Except for EEG or Video-EEG was abnormal in 3 patients, other laboratory investigations were normal in all patients. Twelve patients received flunarizine therapy. Flunarizine reduced the severity, duration, or frequency of hemiplegic attacks in 8 patients.</p><p><b>CONCLUSION</b>The results suggest that AHC is characterized by frequent episodes of alternating hemiplegia with extrapyramidal symptoms and mental retardation, flunarizine is effective in treating some AHC patients.</p>

Effect of Magnesium on Nitric Oxide Synthase of Neurons in Cortex during Early Period of Cerebral Ischemia / 华中科技大学学报（医学）（英德文版）

To investigate the effect of magnesium on nitric oxide synthase (NOS) of neurons in cortex during early cerebral ischemic period, a rat model of middle cerebral artery occlusion (MCAO) was established. The results showed that the NOS activity of neurons in cortex was increased significantly at 15 min after MCAO, reached its peak at 30 min after MCAO and returned to normal levels at 60 min after MCAO. The NOS activity of neurons in the magnesium-treated group was decreased significantly as compared with that in the ischemic group at 15 min and 30min after MCAO respectively. The results suggested that magnesium could inhibit the elevated NOS activity of neurons in cortex induced by cerebral ischemia.

Effect of Magnesium on Nitric Oxide Synthase of Neurons in Cortex during Early Period of Cerebral Ischemia / 华中科技大学学报（医学）（英德文版）

To investigate the effect of magnesium on nitric oxide synthase (NOS) of neurons in cortex during early cerebral ischemic period, a rat model of middle cerebral artery occlusion (MCAO) was established. The results showed that the NOS activity of neurons in cortex was increased significantly at 15 min after MCAO, reached its peak at 30 min after MCAO and returned to normal levels at 60 min after MCAO. The NOS activity of neurons in the magnesium-treated group was decreased significantly as compared with that in the ischemic group at 15 min and 30min after MCAO respectively. The results suggested that magnesium could inhibit the elevated NOS activity of neurons in cortex induced by cerebral ischemia.