Metabolism of New Psychoactive Substances 4F-MDMB-BUTINACA in Zebrafish / 法医学杂志

Objective To study the metabolic transformation pathways of 4F-MDMB-BUTINACA in vivo by establishing zebrafish models. Methods Six adult zebrafish were randomly divided into blank control group and experimental group, with three fish in each group. After the zebrafish in the experimental group were exposed to 1 μg/mL 4F-MDMB-BUTINACA for 24 h, they were transferred to clean water and cleaned three times, then pretreated for instrumental analysis. The zebrafish in blank control group were not exposed to 4F-MDMB-BUTINACA. Mass spectrometry and structural analysis of 4F-MDMB-BUTINACA and its metabolites were conducted by liquid chromatography-high resolution mass spectrometry and Mass Frontier software. Results A total of twenty-six metabolites of 4F-MDMB-BUTINACA were identified in zebrafish, including eighteen phase Ⅰ metabolites and eight phase Ⅱ metabolites. The main metabolic pathways of phase Ⅰ metabolites of 4F-MDMB-BUTINACA in zebrafish were ester hydrolysis, N-dealkylation, oxidative defluorination and hydroxylation, while the main metabolic pathway of phase Ⅱ metabolites was glucuronidation. Conclusion Metabolite Md24 （ester hydrolysis） and Md25 （ester hydrolysis combined with dehydrogenation） would be recommended to be potentially good biomarkers for abuse of 4F-MDMB-BUTINACA.

Analysis Methods of Common Herbicides in Biological Material and Research Progress / 法医学杂志

Herbicides are a kind of chemical or biological agents that can effectively destroy or inhibit weed growth. Because of the widespread and frequent use of herbicides, herbicide poisonings have often been reported. At present, the main species reported to have caused poisoning are paraquat, diquat, glyphosate, and glufosinate. The main instrumental analysis method is LC-MS. This paper reviews the research progress on analysis methods of common herbicides in biological material and their application, summarizes the sample pretreatment and instrumental analysis situation of qualitative and quantitative analysis of herbicides in biological material, and collects test data of actual poisoning cases, to provide reference for clinical diagnosis and treatment and forensic identification of herbicide poisoning.

Formulation regularity and thinking of adjuvant sleep-improving Chinese medicinal health products / 中国中药杂志

To summarize and analyze the current adjuvant sleep-improving Chinese medicinal health products,this study retrieved the information on health products with the sleep-improving effect published by the Department of Special Food Safety Supervision and Management,State Administration for Market Regulation( SMAR),which was statistically analyzed with Microsoft Excel and TCMISS for the characteristics of formulations. A total of 435 sleep-improving health products were collected,including 344 ones containing Chinese herbal medicines. Among them,413 health products were not suitable for adolescents,neither 194 for pregnant women. Ten Chinese herbal medicines showed a frequency of use ≥40,with 1 095 times( 73. 1%) in use. Through unsupervised hierarchical entropy-based clustering of the above Chinese herbal medicines of health products( degree of support of 45 and confidence coefficient of0. 7),12 new formulas were obtained. The composition of Chinese herbal medicines was consistent with the principles of improving sleep in traditional Chinese medicine( TCM) theories,i. e.,replenishing the heart and spleen,nourishing blood,calming the nerves,nourishing Yin,reducing internal heat,communicating the heart and kidney,replenishing Qi,relieving convulsions,clearing heat,resolving phlegm,regulating the middle warmer,soothing the liver,relieving heat,and calming the heart. According to TCM theories,syndrome differentiation was performed based on the existing sleep-improving health products,followed by data mining and analysis according to the formulation regularity,aiming to provide new ideas for the development of new Chinese medicinal health products. In particular,attention should be attached to the requirements of special populations to provide a basis for follow-up studies,exert the advantages of TCM,and lay a foundation for Chinese medicinal health products to service the public.

Cost-effectiveness analysis of rabies immunization strategy based on dynamic-decision tree model / 中华预防医学杂志

Objective@#To evaluate the cost-utility of different immunization strategies for rabies in China, and to provide a reference for determining the optimal immunization strategy.@*Methods@#The system dynamics model was used to simulate the epidemic of canine rabies and a decision tree model was conducted to analysis different immune strategies. Relevant probabilities were obtained through literature search and on-site investigation. Sensitivity analysis was used to explore the important influenced factors.@*Results@#At baseline, from a social perspective, 70% vaccination of dogs was the optimal strategy compared to current vaccination strategy (43% vaccination in dogs, human category-Ⅱ exposure vaccination/category-Ⅲ exposure vaccination combined with RIG). The total cost was 14 084 354 CNY, and the total utility value was 22 078 616.23 QALYs, and the incremental cost-utility ratio was-62 148 147 CNY/QALY; if human vaccination was considered, 55% vaccination of dogs combined with strategy one was the optimal strategy, its incremental cost-utility ratio was-444 620 557 CNY/QALY. The probability that an injured dog carries rabies virus was the most sensitive parameter. When it was greater than 0.005 03, strategy four was the optimal strategy. When it was less than 82/100 000, strategy one was the optimal strategy; when it was between 82/100 000 and 120/100 000, strategy two was the optimal strategy; when it was between 120/100 000 and 503/100 000, strategy two was the optimal strategy.@*Conclusion@#It was conducive to increase the vaccination coverage of canine for the prevention and control of rabies.

Erratum to: The treatment effect of novel hGHRH homodimer to male infertility hamster

The authors note that on page 637 (Author Name), author affiliation of Tao Liu “Tao Liu⁶” should instead appear as “Tao Liu⁵.”

Diagnostic value of procalcitonin detection in Candida bloodstream infection / 中华急诊医学杂志

Objective To discuss the clinical application value of serum procalcitonin(PCT) in patients with Candida bloodstream infection.Methods The data of 783 hospitalized patients of Tianjin Medical University General Hospital including blood culture and serum PCT test were retrospectively analyzed,and the medical records of patients with Candida or bacterial bloodstream infection were evaluated by univaxiate and multivariate logistic regression analysis.The comparison of PCT value were carried out among the different blood culture groups using the Mann-Whitney U test.A receiver operating characteristic(ROC) curve was used to determine the diagnostic performance of the PCT.Results The PCT was 0.21 (0.06,1.02) ng/mL in the 510 patients with negative blood culture,but in 121 patients with Candida infection and 152 patients with bacteria infections,the PCT levels were 1.15 (0.38,6.85) ng/ mL and 2.34 (0.77,15.12) ng/mL,respectively.There were statistically significant differences in PCT levels among three groups(P＜0.05).According to ROC,when the value of PCT was 0.355 ng/mL,the sensitivity was 76.9％,and the specificity was 60.8％ with 0.726 area under the curve (AUC) (P＜0.01) for the identification of Candida infection by blood cultures.Conclusions Serum PCT levels have a certain diagnostic value for Candida bloodstream infection.In critically ill patients with factors associated with candidemia,the combination of clinical symptoms with PCT as an adjuvant diagnostic marker and other laboratory findings can be used to make a prompt and effective initiation of antifungal therapy.

The treatment effect of novel hGHRH homodimer to male infertility hamster

Extra-hypothalamic growth hormone-releasing hormone (GHRH) plays an important role in reproduction. To study the treatment effect of Grin (a novel hGHRH homodimer), the infertility models of 85 male Chinese hamsters were established by intraperitoneally injecting 20 mg/kg of cyclophosphamide once in a week for 5 weeks and the treatment with Grin or human menopausal gonadotropin (hMG) as positive control was evaluated by performing a 3-week mating experiment. 2–8 mg/kg of Grin and 200 U/kg of hMG showed similar effect and different pathological characteristics. Compared to the single cyclophosphamide group (0%), the pregnancy rates (H-, M-, L-Grin 26.7, 30.8, 31.3%, and hMG 31.3%) showed significant difference, but there was no difference between the hMG and Grin groups. The single cyclophosphamide group presented loose tubules with pathologic vacuoles and significant TUNEL positive cells. Grin induced less weight of body or testis, compactly aligned tubules with little intra-lumens, whereas hMG caused more weight of body or testis, enlarging tubules with annular clearance. Grin presented a dose-dependent manner or cell differentiation-dependentincrease in testicular GHRH receptor, and did not impact the levels of blood and testicular GH, testosterone. Grin promotes fertility by proliferating and differentiating primitive cells through up-regulating testicular GHRH receptor without triggering GH secretion, which might solve the etiology of oligoasthenozoospermia.

Nodular fasciitis of the breast: a clinicopathologic study of 4 cases with review of literature / 临床与实验病理学杂志

Purpose To summarize the clinicopathologic features,diagnosis and differential diagnosis of nodular fasciitis (NF) of the breast.Methods Clinicopathologic findings of four mammary NF cases were retrospectively reviewed.Immunohistochemical of EnVision staining was performed in all cases.Results The median age of all patients was 50.5 years.All patients were female,without history of trauma.The average size was 1.2 cm.Among the four cases reviewed,three lesions occurred in the mammary parenchyma and one next to the skin.Histologically,the lesion was composed of plump spindle cells arranged in short fascicles with erythrocytes extravasation and patchy lymphoid infiltration,and the border of three cases was infiltrative.Immunohistochemically,the spindle cells were positive for vimentin,CD10 and SMA,but negative for CK (AE1/AE3),CK5/6,CK14,CAM5.2,ER and PR.All patients underwent surgical resection,with no evidence of recurrence.Conclusion NF of the breast is rare.It should be differentiated from some benign and malignant tumours,such as fibromatosis,phyllodes tumor and low-grade fibromatosis-like metaplastic carcinoma.The immunostaining of vimentin and SMA may helpful for the diagnosis and differential diagnosis of NF of breast.

Tendon-bone healing after acute anterior cruciate ligament reconstruction with versus without remnant preservation / 中国组织工程研究

BACKGROUND:Reconstruction with remnant preservation can enhance tendon-bone healing. However, the study limits on the histological level, and there is a lack of research based on the modular biological level. OBJECTIVE:To investigate whether anterior cruciate ligament reconstruction with remnant preservation can enhance tendon-bone healing. METHODS:Seventy-two New Zealand rabbits were randomly al ocated to three groups (n=24 per group), fol owed by cruciate ligament reconstruction without remnant (group A), with remnant preservation (femoral tensioning and augmented suture) (group B) and with remnant preservation (graft passing remnant anterior cruciate ligament sheath) (group C), respectively. RESULTS AND CONCLUSION:Hematoxylin-eosin staining showed that the tendon-bone healing in the groups B and C surpassed that in the group A, and group B was better than group C. Real-time PCR revealed that the expression level of osteoprotegrin mRNA and the osteoprotegrin/receptor activator of nuclear factor-κB ligand (RANKL) ratio were greater in the groups B and C than in the group A, and highest in the group C, while the expression levels of RANKL mRNA in the groups B and C were lower than that in the group A. In conclusion, these two kinds of anterior cruciate ligament reconstruction methods with remnant preservation can enhance tendon-bone healing, which have obtained most obvious achievements in the anterior cruciate ligament reconstruction in the graft passing anterior cruciate ligament remnant sheath that may be related to the up-regulation of osteoprotegrin mRNA and down-regulation of RANKL mRNA.

The diagnosis value of the whole blood interferon-γrelease assay in tuberculosis / 天津医药

Objective To evaluate the clinical application of the whole blood interferon γ(IFN-γ) release assay of QuantiFERON TB Gold in tube (QFT-GIT) in diagnosis of tuberculosis. Methods From October 2014 to October 2015, 109 patients with tuberculosis (45 cases of confirmed patients and 64 cases of clinically diagnosed patients) and 70 patients with non-tuberculosis were enrolled in Tianjin Medical University General Hospital. In order to evaluate diagnosis value between two kinds of tests, and to compare the differences between two groups, QFT-GIT test and colloidal gold anti tuberculosis antibody (TB-Ab) were employed to detect in two groups of patients. The ROC curve of IFN-γrelease quantity was analyzed in two groups. Results The sensitivity and specificity of QFT-GIT were 93.58% and 85.71% respectively. The positive rate was significantly higher in QFT-GIT than that of TB-Ab (χ2=43.68,P<0.01). The sensitivity of combined detection of the two methods decreased to 52.3% (57/109), but the specificity increased to 90.0% (63/70). The release quantity of IFN-γwas significantly higher in tuberculosis group than that in the non-tuberculosis group (U=330,P<0.05). The area under the ROC curve of IFN-γrelease quantity was 0.913 (95%CI:0.864-0.963). Conclusion The whole blood IFN-γrelease assay of QFT-GIT is a sensitive and specific assay for detecting tuberculosis infection. The combination QFT-GIT with TB-Ab can improve the specificity further, which could be a useful tool for the diagnosis of tuberculosis .

Expressions of EphA2 in esophageal squamous cell carcinoma tissues and serums of 2 different ;nations in Xinjiang and its clinicopathological significance / 中国癌症杂志

Background and purpose:The incidence of esophageal cancer of Kazakh race is higher than that of Han people. EphA2, as a member of Eph protein family, is related to a variety of malignant tumors. This study used immunohistochemical method and enzyme-linked immunoassay to detect EphA2 in tissues and serums of Kazakh and Han patients. Therefore to analyze the expression differences of EphA2 in esophageal squamous cell carcinoma (ESCC) tissues and serum of Kazakh and Han patients in Xinjiang, and the relationship with pathological features. Methods:The expression of EphA2 protein was detected by immunohistochemistry method in 100 cases of ESCC tissues and adjacent normal esophageal tissues;Then was tested by ELISA in those cases’ serum and 60 healthy persons. Results:The positive expression rate of EphA2 protein in ESCC and corresponding adjacent tissues were 72.0%, 28.0% in Kazakh, and 62.0%, 26.0% in Han people, respectively, and the differences were statistically significant (P=0.000) in the 2 nations. EphA2 protein levels in serum of ESCC and healthy persons, and Kazakh were (58.36±12.60) and (29.39±7.34) pg/mL, Han Chinese were (58.79±13.29) and (29.39±7.34) pg/mL respectively, there were statistical signiifcance (P=0.000). In ESCC of Kazakh and Han people, EphA2 protein expression had relationship with lymph node metastasis, TNM stage and tumor depth of invasion (P0.05). Conclusion:The high expression of EphA2 protein may contribute to the occurrence, invasion and metastasis of Kazakh and Han ESCC patients. EphA2 protein expression in tissues and serum of patients with ESCC may be related to the primary tumor invasion, lymph node metastasis and TNM stage. The expression of EphA2 protein in peripheral blood of patients with esophageal cancer in Kazakh may be related to depth the of invasion.

Drug-resistant Gene and Disinfectant-resistant Gene for MRSA / 中华医院感染学杂志

OBJECTIVE To study the drug resistance,drug-resistant genes and(disinfectant)-resistant genes of(MRS)A.METHODS The drug resistance and mecA gene of the ?-lactamase and aac(6′)/aph(2″),aph(3′)-Ⅲ,ant(4′,4″) genes of aminoglycoside and qac(A/B) disinfectant-resistant genes were(detected) in 47 strains of MRSA.(RESULTS) In all 47 strains of MRSA,46 MRSA isolates were mecA positive,39 MRSA isolates were aac(6′)/aph(2″) positive,30 MRSA isolates were aph(3′)-Ⅲ positive,6 MRSA isolates were ant(4′,4″) positive,and 19 MRSA isolates were qac(A/B) positive.CONCLUSIONS MRSA is multiple-drug resistant.The main resistant mechanisms of MRSA to aminoglycosides and disinfectant are related to the drug-resistant genes of aminoglycoside and disinfectant-resistant genes.Clinic physician must pay attention to the diagnosis and(therapy) of MRSA,and control the hospital infection.