The characteristics of non-alcoholic fatty liver disease and its associated factors in patients with rheumatoid arthritis / 中华预防医学杂志

Objective: To investigate the characteristics of non-alcoholic fatty liver disease (NAFLD) and its associated factors in rheumatoid arthritis (RA) patients. Methods: This cross-sectional study recruited 385 RA patients [including 72 (18.7%) male and 313 (81.3%) female] who received abdominal sonographic examination from August 2015 to May 2021 at Department of Rheumatology, Sun Yat-Sen Memorial Hospital. There were 28 RA patients at 16-29 years old and 32, 80, 121, 99, 25 at 30-39, 40-49, 50-59, 60-69, ≥ 70 years old, respectively. Demographic and clinical data were collected including age, gender, history of alcohol consumption, disease duration, body mass index (BMI), waist circumference, blood pressure, RA disease activity indicators and previous medications. Logistic regression analyses were used to identify the associated factors of NAFLD in RA patients. Results: The prevalence of NAFLD was 24.2% (93/385) in RA patients, 26.3% (21/80) in 40-49 age group and 33.1% (40/121) in 50-59 age group. There were 22.1% (85/385) and 3.6% (14/385) RA patients with overweight and obese, in which the prevalence of NAFLD was 45.9% (39/85) and 78.6% (11/14) respectively, which was 2.6 folds and 4.5 folds that of RA patients with normal BMI. Although there was no significant difference of age, gender and RA disease activity indicators between RA patients with or without NAFLD, those with NAFLD had higher proportions of metabolic diseases including obese (11.8% vs. 1.0%), central obesity (47.3% vs. 16.8%), hypertension (45.2% vs. 29.8%) and type 2 diabetes mellitus (24.7% vs. 12.0%), consistent with higher levels of total cholesterol [(5.33±1.31) mmol/L vs. (4.73±1.12) mmol/L], triglyceride [(1.51±1.08) mmol/L vs. (0.98±0.54) mmol/L] and low-density lipoprotein cholesterol [(3.37±0.97) mmol/L vs. (2.97±0.78) mmol/L, all P<0.05]. Multivariate logistic regression analysis showed that BMI (OR=1.314) and triglyceride (OR=1.809) were the independent factors positively associated with NAFLD in RA patients. Conclusion: NAFLD is a common comorbidity in RA patients, especially in those with middle-aged, overweight or obese, which is associated with high BMI or high triglyceride. Screening and management of NAFLD in RA patients especially those with overweight, obese or dyslipidemia should be emphasized.

Progress in replicative senescence of mesenchymal stem cells regulated by microenvironment / 生理学报

Mesenchymal stem cells (MSCs) are a class of pluripotent cells that can self-renew and differentiate. Numerous studies have shown that MSCs have important roles in areas such as regenerative medicine and tissue engineering. However, it is worth noting that MSCs will gradually age during long-term in vitro expansion with decreased stemness such as weakened migration ability, slowed proliferation rate and decreased differentiation potential, which greatly hinders the application of MSCs. Currently, the microenvironment for cell growth is recognized as one of the factors causing senescence in MSCs. Recent studies point out that the latest technologies such as exogenous administration, oxygen concentration regulation and extracellular matrix (ECM) construction can delay stem cell senescence by simulating or regulating the microenvironment. Here, we review the current knowledge of the characteristics and molecular mechanisms of senescent MSCs and microenvironment strategies to maintain MSCs stemness, which can provide a reference for future large-scale application of MSCs preparations in tissue engineering and clinical studies.

Research progress on the regulation and mechanism of reactive oxygen species on tumor immune checkpoints / 药学学报

Immune checkpoints (ICs) are immunosuppressive molecules expressed on immune cells, which can regulate immune cells' activation. Immune checkpoint inhibitors (ICIs) which can block the interaction of immune checkpoints and their ligands, improve the cytotoxic effect of the immune system on tumor cells. Immunotherapy such as employing ICIs has gradually become a conventional therapeutic strategy for cancer treatment. However, the low response rate and the emergence of drug resistance have seriously affected the clinical efficacy of ICIs. Reactive oxygen species (ROS) are electronic reduction products of active oxygen, as well as natural by-products of cell metabolism, which can be used as regulators of intercellular signals. Tumor microenvironment (TME) is often in the state of oxidative stress (OS), which is the imbalance between oxidative system and antioxidant system. ROS can affect the interaction with its ligands by regulating the expression and activity of immune checkpoints in TME, thus affecting the anti-tumor effect of immune cells. Accumulating studies have shown that ROS could regulate tumor immune checkpoints through several pathways. Due to different types and stages of tumor, it would be clinical beneficial to understand the mechanistic link of ROS on tumor immune checkpoint, and choose appropriate ROS regulators combined with immune checkpoint inhibitors to maximize anti-tumor effects. This article reviews the common metabolic sources and characteristics of ROS, the regulatory effect and mechanism of ROS on tumor immune checkpoints and its therapeutic application.

Advances of using microfluidic chips for research and diagnosis of pulmonary inflammatory diseases / 生物工程学报

Microfluidic chip technology integrates the sample preparation, reaction, separation and detection on a chip. It consists a network of microchannels, which controls the whole system through fluid. With the advantages of portability, high throughput, and the ability to simulate the microenvironment in vivo, it has a broad application prospect in the research of disease diagnosis, pathogenesis and drug screening. Pulmonary inflammatory disease is a common disease usually caused by bacterial, viral and fungal infections. Early pneumonia is often difficult to diagnose due to lack of obvious respiratory symptoms or the symptoms are mostly atypical, but the disease progresses rapidly. Recently, microfluidic chip technology has been increasingly used to the study of pulmonary inflammatory diseases. In particular, it has been used to develop a "lung-on-a-chip" model, which can reproduce the key structure, function and mechanical properties of human alveolar capillary interface (i.e., the basic functional unit of a living lung), and well simulate the alveoli in vitro. Compared with the cell and animal models, this multifunctional micro experimental platform has great advantages. This article summarizes the advances of using microfluidic chips for the research and diagnosis of pulmonary inflammatory diseases, with the aim to provide new ideas for researchers in this area.

Research progress on the role of Ang/Tie axis in angiogenesis and metastasis / 药学学报

The tumor contains abundant new vessels, which are unevenly distributed, irregular, and branch-disordered. Angiopoietin (Ang) and tyrosine kinase receptor Tie mediate stable maturation of angiogenesis. Ang1 mainly plays a role in promoting vascular stabilization, and Ang2 is highly expressed in vessels, which makes the structure and function of vessels abnormal. Leaked vessels provide opportunities for invasion and metastasis of circulating tumor cells. Targeting the Ang/Tie axis to correct the abnormal state of vessels and promote its normalization, combined with chemotherapy drugs or immunotherapy, play a synergistic effect against tumors. This article summarizes the role of Ang/Tie axis in tumor angiogenesis and metastasis, and it aims to provide new ideas and strategies for clinical treatment of tumors.

High salt-induced weakness of anti-oxidative function of natriuretic peptide receptor-C and podocyte damage in the kidneys of Dahl rats / 中华医学杂志(英文版)

BACKGROUND@#Atrial natriuretic peptide (ANP) and its natriuretic peptide receptors A (NPR-A) and C (NPR-C) are involved in the regulation of physiological and pathophysiological process of blood pressure. The present study aimed to determine the role of NPR-C in the development of salt-sensitive hypertension.@*METHODS@#The Dahl salt-sensitive (DS) and salt-resistant (DR) rats were used in this study. Animals were matched according to their age and weight, and then placed on either a high-salt (HS, 8%) or a normal-salt (NS, 0.4%) diet for 6 weeks randomly using random number table. The systolic blood pressure (SBP), plasmatic sodium concentration (PLNa), urinary sodium excretion (UVNa), and serum creatinine concentration (Scr) were measured. The concentration of ANP in blood and tissues (heart and kidney) was detected by enzyme-linked immunosorbent assay. The expression of ANP, NPR-A, and NPR-C in kidney was evaluated with western blot analysis. Regarding renal redox state, the concentration changes in malondialdehyde (MDA), lipofuscin, nicotinamide adenine dinucleotide phosphate (NADPH) oxidase (Nox), and nitric oxide synthase (NOS) in kidney were detected by a spectrophotometric method. The kidney damage was evaluated using pathological techniques and the succinodehydrogenase (SDHase) examination. Furthermore, after an intra-peritoneal injection of C-atrial natriuretic peptide (ANP)4-23 (C-ANP4-23), an NPR-C receptor agonist, the SBP, biochemical values in blood and urine, and renal redox state were evaluated. The paired Student's t test and analysis of variance followed by the Bonferroni test were performed for statistical analyses of the comparisons between two groups and multiple groups, respectively.@*RESULTS@#The baseline SBP in all groups was within the normal range. At the end of the 6-week experiment, HS diet significantly increased the SBP in DS rats from 116.63 ± 2.90 mmHg to 162.25 ± 2.15 mmHg (t = -10.213, P  0.05). The significant increase of PLNa, UVNa, and Scr related to an HS diet was found in both DS and DR rats (all P < 0.05). However, significant changes in the concentration (t = -21.915, P < 0.001) and expression of renal ANP (t = -3.566, P = 0.016) and the expression of renal NPR-C (t = 5.864, P = 0.002) were only observed in DS hypertensive rats. The significantly higher desmin immunochemical staining score (t = -5.715, P = 0.005) and mitochondrial injury score (t = -6.325, P = 0.003) accompanied by the lower SDHase concentration (t = 3.972, P = 0.017) revealed mitochondrial pathologic abnormalities in podocytes in DS rats with an HS diet. The distinct increases of MDA (t = -4.685, P = 0.009), lipofuscin (t = -8.195, P = 0.001), and Nox (t = -12.733, P < 0.001) but not NOS (t = -0.328, P = 0.764) in kidneys were also found in DS hypertensive rats. C-ANP4-23 treatment significantly decreased the SBP induced by HS in DS rats (P < 0.05), which was still higher than NS groups with the vehicle or C-ANP4-23 treatment (P < 0.05). Moreover, the HS-induced increase of MDA, lipofuscin, Nox concentrations, and Nox4 expression in DS rats was significantly attenuated by C-ANP4-23 treatment as compared with those with HS diet and vehicle injection (all P < 0.05).@*CONCLUSIONS@#The results indicated that the renal NPR-C might be involved in the salt-sensitive hypertension through the damage of mitochondria in podocytes and the reduction of the anti-oxidative function. Hence, C-ANP4-23 might serve as a therapeutic agent in treating salt-sensitive hypertension.

Mesenchymal stem cells in the treatment of COVID-19-progress and challenges / 生物工程学报

At present, SARS-CoV-2 is raging, and novel coronavirus pneumonia (COVID-19) has caused more than 35 million confirmed patients and more than 500 000 cases death, which seriously endanger human health, socioeconomic development, as well as global medical and public health systems. COVID-19 is highly contagious, has a long incubation period, and causes many death cases due to lack of effective specific treatment. Mesenchymal stem cells have powerful anti-inflammatory and immunoregulatory functions, and can effectively reduce the cytokine storm caused by coronavirus in patients, and improve the pulmonary fibrosis of patients, promote the repair of damaged lung tissue, and reduce the mortality. Currently, a number of related clinical trials of mesenchymal stem cell treatment of COVID-19 have been conducted, and have confirmed the safety and efficacy, suggesting a good clinical application prospect. While progress has been made in mesenchymal stem cell therapy for COVID-19, we should also catch sight of the problems and challenges faced by mesenchymal stem cell clinical trials under severe epidemic situation, including clinical trials design, stem cell quality management, and ethics in treatment. Only by paying attention to these can we guarantee the safe and effective development of mesenchymal stem cell clinical trials in the treatment of COVID-19.

Intrinsic and extrinsic mechanisms regulating neuronal dendrite morphogenesis / 浙江大学学报·医学版

Neurons are the structural and functional unit of the nervous system. Precisely regulated dendrite morphogenesis is the basis of neural circuit assembly. Numerous studies have been conducted to explore the regulatory mechanisms of dendritic morphogenesis. According to their action regions, we divide them into two categories: the intrinsic and extrinsic regulators of neuronal dendritic morphogenesis. Intrinsic factors are cell type-specific transcription factors, actin polymerization or depolymerization regulators and regulators of the secretion or endocytic pathways. These intrinsic factors are produced by neuron itself and play an important role in regulating the development of dendrites. The extrinsic regulators are either secreted proteins or transmembrane domain containing cell adhesion molecules. They often form receptor-ligand pairs to mediate attractive or repulsive dendritic guidance. In this review, we summarize recent findings on the intrinsic and external molecular mechanisms of dendrite morphogenesis from multiple model organisms, including , and mice. These studies will provide a better understanding on how defective dendrite development and maintenance are associated with neurological diseases.

Determination of methyl ethyl ketone in urine by headspace gas chromatography / 中华劳动卫生职业病杂志

Objective@#To establish a method for determination of methyl ethyl ketone in urine by headspace gas chromatography.@*Methods@#In the urine sample(hereinafter referred to as urine sample), methyl ethyl ketone is pretreated by headspace technology, and a certain amount of head air is injected into the gas chromatograph, separated by capillary column, detected by hydrogen flame ionization detector, and the retention time is qualitative and the peak height is high. Peak area.@*Results@#Good linearity was in the range of 0.01 to 6.0 μg/ml with a regression equation of y=13.316x+0.8497 and γ=0.9997.The minimum detectable concentration of methyl ethyl ketone was 0.01 μg/ml. The range intra-day RSD and inter-day RSD were 2.2%-5.5% and 2.5%-6.1% respectively. Urine samples can be stored for 20 days in the refrigerator at 4 ℃.@*Conclusion@#The method has a high advantage of sensitivity and accuracy, and also easy to operate. Therefore, it is suitable for the determination of methyl ethyl ketone in urine.

Research progress of Adenosine 5'-monophosphate-activated protein kinase in the regulation of glycolipid metabolism / 生物工程学报

Adenosine 5'-monophosphate-activated protein activated protein kinase (AMPK), a heterotrimeric complex, is an important kinase to regulate glycolipid metabolism and energy balance involved in a variety physiological processes in human body. Many research indicated that the function and activity of AMPK were closely related to inflammation, diabetes and cancers. Recent reports show that inhibition of metformin (a first-line drug) on hepatic glucose in patients with hyperglycemia is associated with AMPK pathway, suggesting that targeting AMPK may be one of the effective strategies for the prevention and treatment of a variety of chronic diseases. Here, we review research progress on the structure, activation and regulation of AMPK in glycolipid metabolism to provide an insight into the basic and clinical research of diabetes therapy.

Caveolin-1: oxidative stress target in tumor cells / 生理学报

Aberrant oxidative metabolism in cells is one of the hallmarks of cancer. Overproduction of reactive species promotes carcinogenesis by inducing genetic mutations and activating oncogenic pathways, and thus, antioxidant therapy is considered as an important strategy for cancer prevention and treatment. Caveolin-1 (Cav-1), a constituent protein of caveolae, is involved in not only the formation of the caveolae, vesicular transport, maintaining cholesterol homeostasis directly, but also many cellular physiological and pathological processes including growth, regulation of mitochondrial antioxidant level, apoptosis and carcinomas by interacting with a lot of signaling molecules through caveolin scaffolding domain. Cav-1 has also been shown to mediate tumor genesis and progression through oxidative stress modulation, while Cav-1-targeted treatment could scavenge the reactive species. Intracellular reactive species could modulate the expression, degradation, post-translational modifications and membrane trafficking of Cav-1. More importantly, emerging evidence has indicated that multiple antioxidants could exert antitumor activities in cancer cells by modulating the signaling of Cav-1. This paper reviewed the research progresses on the roles of Cav-1 and oxidative stress in tumorigenesis and development, and would provide new insights on designing strategies for cancer prevention or treatment.

Determination of diethyl phthalate in the air of workplace by gas chromatography / 中华劳动卫生职业病杂志

Objective@#To establish a method for the determination of diethyl phthalate by gas chromatography in the air of workplaces.@*Methods@#Diethyl phthalate in the air of workplace was collected throμgh glass fiber filter, eluted with methylbenzene, and detected by gas chromatography coupled with FID detectors.@*Results@#The linear range of diethyl phthalate determined by this method was 14.0~1 400 μg/ml, y=2.09801x-3.66229, and the coefficient correlation was 0.999 99. The detection limit was 1.10 μg/ml, and the minimum detection concentration was 0.18mg/m3 (collected sample volume was 30 L) . The within-run precisions were 1.04%~2.75%, and the between-run precisions were 0.34%~1.30%. The recovery rates were 98.72%~103.21%, and sampling efficiency was 97.2%~100.0%. The elution efficiencies were 97.25%~98.68%. The samples could be stored at room temperature for 15 days.@*Conclusion@#The indicators established in this study were conformed with the requirements of GBZ/T210.4-2008, "The Guidelines for the Development of Occupational Hygiene Standards Methods Part 4: Determination of Chemical Substances in the Air of Workplaces" . Diethyl phthalate in the workplace air could be rapidly collected, accurate separated and determinated. This method is applicable to the determination of diethyl phthalate in the workplace air.

Comparative analysis of serum IgE detected by ImmunoCAP and EUROLine assays / 医学研究生学报

Objective The diagnosis of allergic diseases mainly relies on the allergen skin test or in vitro specific IgE test. This study was to explore the diagnostic efficiency of EUROLine and its application in southern China by reference to the standard method of the immunoenzymatic capsulated hydrophilic carrier polymer (ImmunoCAP).Methods Using the EUROLine system, we examined 12 common specific IgEs (sIgE) from 283 patients with multiple sensitizations in the First Affiliated Hospital of Guangzhou Medical University, including cockroach (i6), dog dander (e2), cat dander (e1), Mugwort (w6), ragweed (w1), dust mites (ds1), chicken protein (f1), milk (f2), crab (f23), shrimp (f24), peanut (f13) and soybean (f14).Results EUROLine showed that house dust mite allergens were the main aeroallergens in southern China, with a positive rate of 66.3%, while egg white had the highest positive rate (53.2%) in food allergens. The overall rate of the allergens detected by EUROLine was consistent to that of ImmunoCAP by 60.8%-90.1%, the positive rate by 63.3%-93.6%, and the negative rate by 54.5%-95.2%. The Kappa value of EUROLine was 0.203-0.702 in detecting each allergen and >0.6 with cat hair, egg white, peanut, milk and mugwort. The rank correlation coefficient between ImmunoCAP and EUROLine was >0.7 for dust mite combination, cat hair, mugwort, egg white, milk, peanut and crab allergens, with the highest consistency rate for egg white (93.17% \[191/205\]), the lowest for shrimp (70.83% \[170/240\]), and an overall consistency rate of 82.68% (1542/1865).Conclusion The EUROLine system has a high diagnostic performance, and it is inexpensive, efficient and applicable in the detection of allergens in southern China.

Effects of acupoint specificity on claustrophobia / 中国针灸

OBJECTIVE@#To observe the effectiveness of acupuncture on claustrophobia, and to explore the effects of acupoint specificity on claustrophobia.@*METHODS@#This was an evaluator-blinded randomized controlled trial. One hundred and sixty patients who presented with claustrophobia during magnetic resonance imaging examination were randomized into an acupoint group, a non-acupoint group, a sham-acupoint group and a blank group, 40 cases in each one. The patients in the acupoint group were treated with acupuncture at Zhaohai (KI 6), Taichong (LR 3), Lingdao (HT 4), Neiguan (PC 6), Shenmen (HT 7), Danzhong (CV 17), Baihui (GV 20) and Fengchi (GB 20). The patients in the non-acupoint group were treated with acupuncture at points 0.5 next to the acupoints above. The patients in the sham-acupoint group were treated with acupuncture at acupoints not closely correlated to claustrophobia in corresponding segment. All the acupuncture was given once. No treatment was used in the blank group. The state anxiety questionnaire (S-AI) was observed in all the patients at the end of MRI examination before and after treatment. The clinical therapeutic effects were compared among four groups.@*RESULTS@#Compared before treatment, the S-AI score was reduced in the acupoint group, non-acupoint group and sham-acupoint group after treatment (0.05). After treatment, the S-AI scores in the acupoint group, non-acupoint group and sham-acupoint group was lower than that in the blank group (<0.05, <0.01), and the differences of S-AI score were higher than that in the blank group (<0.01). The S-AI score in the acupoint group was lower than that in the non-acupoint group and sham-acupoint group (<0.05), and the difference of S-AI score was higher than those in the non-acupoint group and sham-acupoint group (<0.05). The difference of S-AI score in the non-acupoint group was higher than that in sham-acupoint group (<0.05). The total effective rate was 92.5% (37/40) in the acupoint group, which was significantly superior to 25.0% (10/40) in the non- acupoint group, 17.5% (7/40) in the sham-acupoint group and 5.0% (2/40) in the blank group (<0.05, <0.01).@*CONCLUSION@#Acupuncture showes superior effect on claustrophobia, and its tranquilizing effect may be related with acupoint specificity.

Clinical observation on the muscle tension staged acupuncture for stroke hemiplegia / 中国针灸

OBJECTIVE@#To compare the clinical curative effect of muscle tension staged acupuncture and conventional acupuncture in the treatment of stroke hemiplegia.@*METHODS@#Sixty-two patients with stroke hemiplegia were randomly divided into an observation group and a control group, 31 cases in each one. In the observation group, the muscle tension staged acupuncture was given, the six stages of Brunnstrom were classified as relaxation period and spasmodic period. The (consciousness-restoring resuscitation) combined with the hand and foot meridian acupuncture were applied at Shuigou (GV 26), Jianyu (LI 15), Quchi (LI 11), Shousanli (LI 10), Hegu (LI 4), Liangqiu (ST 34), Zusanli (ST 36), Shangjuxu (ST 37), Jiexi (ST 41) during relaxation period; mainly by hand and foot meridian and meridian, the acupoints were Jianliao (TE 14), Tianjing (TE 10), Waiguan (TE 5), Yangchi (TE 4), Houxi (SI 3), Huantiao (GB 30), Yanglingquan (GB 34), Chengshan (BL 57), Xuanzhong (GB 39), Shenmai (BL 62), Qiuxu (GB 40) during spasmodic period. In the control group, referring to 's , mainly by hand meridian, the governor vessel and foot meridian, phasing was not considered in the acupuncture treatment plan. Both groups were treated one time a day for 4 weeks. The neurological deficit scores were observed before and after treatment of the two groups and the efficacy was evaluated.@*RESULTS@#There was one case dropped in each group. After treatment, the neurological deficit scores of the two groups was lower than those before treatment (both <0.05), and the observation group was lower than the control group (<0.05). The cured and markedly effective rate was 66.7% (20/30) in the observation group, which was higher than 36.7% (11/30) in the control group, the difference between the two groups was statistically significant (<0.05).@*CONCLUSION@#The muscle tension staged acupuncture is better than the conventional acupuncture for the treatment of stroke hemiplegia.

Efficacy of triamcinolone acetonide injection by ganglion impar block for sacral nerve dysfunction syndrome / 中华老年医学杂志

Objective To evaluate the efficacy of triamcinolone acetonide injection by ganglion impar block in treating sacral nerve dysfunction syndrome.Methods Fifty-four cases of sacral nerve disorder syndrome,mainly presented with anal pendant expansion,were admitted between October 2014 to October 2016.The clinical efficacy assessed by visual analogue scale(VAS)was recorded and analyzed.Results For all patients,the symptoms were relieved in 15 minutes after ganglion impair block,and the VAS was significantly reduced after treatment.The excellent rate was 81.5％ and the total efficiency was 100.0％ in one week after surgery.Meanwhile,the excellent rate and the total efficiency were 90.7％ and 100.0％ in one month,94.4％ and 100.0％ in 3 months,83.3％ and 100.0 ％ in 6 months,respectively.Conclusions Triamcinolone acetonide injection by ganglion impar block is effective for sacral nerve dysfunction mainly presented with anal pendant expansion.

Clinicopathological characteristics and prognosis of salivary gland secretory carcinoma / 临床与实验病理学杂志

Purpose To investigate the clinicopathological features and prognosis of salivary gland secretory carcinoma(SC). Methods A retrospective study was performed including reviewing the clinical documents and pathological sections of 10 cases of SC. Immunohistochemical EnVision study and histochemical staining were performed in the 10 cases. Fluorescence in situ hybridization (FISH) was used to detect the ETV6-NTRK3 fusion gene. Results There were 8 men and 2 women included in this study. The mean age was 45 years(ranged from 22 to 62 years).9 cases occurred in the parotid and 1 case in submandibular gland. Local painless masses were common first symptoms. Tumor size ranged from 1 cm to 3.5 cm in maximum diameter (average 1.8 cm) and the cut surface of most tumors was solid with dusty red or grayish yellow color, of which 1 case showed cystic degeneration. Histologically, the tumors usually pushed and were invasive to the adjacent tissues. Sometimes, the tumors showed expansive growth pattern. Tumor cells demonstrated microcystic, cystic papillary and alveolar patterns. Eosinophilic secretions could be observed in both microcysts and lumen of alveolus. Immunohistochemically, 10 cases revealed diffuse positivity of cytokeratin, and 9 cases were diffusely and strongly positive for S-100, Mammaglobin, vimentin and CK7, whereas all cases were negative for CD117, Dog-1, p53, p63, SMA, and GATA3. The tumor cells were positive for PAS staining and negative for mucicarmine staining. The detection ETV6-NTRK3 fusion gene was carried out in 4 cases by FISH analysis, among which 3 cases were positive. Follow-up data were available in the 10 patients (ranged from 2 months to35 years), among which 9 patients were alive, except for 1 patient died of tumor recurrence and metastasis 16 years after surgery. Conclusion SC is a newly recognized rare malignant tumor of salivary gland with a lowgrade malignancy, slow growth pattern and favorable prognosis. The histological structures of microcysts and eosinophilic secretions are (he crucial histological characteristics of SC. Diffusely strong positive expression of S-100 and mammaglobin is helpful for the diagnosis and differential diagnosis of the tumor. The diagnosis of SC could be confirmed when ETV6-NTRK3 fusion gene could be identified.

A Clinical Experience of Laparoscopic Nephrectomy in Primary Hospital / 昆明医科大学学报

Objective To investigate the clinical value and the experience of retroperitoneal laparoscopic nephrectomy in primary hospitals. Methods A retrospective analysis of 20 cases of retroperitoneal nephrectomy performed in the people's hospital of Jianshui from July 2014 to December 2017 and 23 cases of open nephrectomy in the same period as the control group, the two groups of surgery and postoperative recovery were analyzed and compared. Results The two groups of patients were operated successfully. The surgery time of the laparoscopic group was (110.14 ±15.63) min and the control group was (100.33 ±10.58) min. There was no statistical difference between the two groups (P＞0.05). No complications occurred during the follow-up period between the two groups, and the difference was not statistically significant. The intraoperative blood loss in the two groups was (40.63 ±22.21) ml and (80.45 ±38.31) m L respectively, and the difference was statistically significant (P＜ 0.05).The indwelling time of drainage tube in the two groups was (2-3) days and (6-7) days respectively. The difference was statistically significant (P＜ 0.05), and the hospitalization time was (3.2 ±2.2) days and (6.4 ± 3.3) days respectively, the difference was statistically significant (P＜0.05). Conclusions Laparoscopic nephrectomy has the advantages of less trauma, faster recovery and shorter hospital stay. With the improvement of operation technique, it will bring more advantages and be worth popularizing.

Detecting triphenyl phosphate in workplace air by gas chromatography / 中国职业医学

OBJECTIVE: To establish a method for detecting triphenyl phosphate( TPP) in the workplace air by gas chromatography. METHODS: TPP in the air of workplace was collected with glass fiber filter paper,desorbed with ether,separated by HP-5 gas chromatographic column,and detected by flame photometric detector. RESULTS: This method has good linear range of 12. 50-800. 00 mg/L,with the correlation coefficient of 0. 999 9. The detection limit was 0. 78 mg/L,and the minimum detectable concentration was 0. 09 mg/m3(sample volume was 45 L). Desorption efficiency was 97. 2%-99. 4%; standard recovery rate was 99. 5%-100. 3%. The within-run relative standard deviation( RSD) was 2. 7%-3. 4%and the between-run RSD was 1. 4%-3. 2%. The sampling efficiency was 99. 6%-100. 0%. The samples could be stored at room temperature for at least 14 days. CONCLUSION: The method is simple,accurate and highly sensitive for detecting TPP in workplace air.

Thoracoscopelungcancer resection with non tracheal intubation anesthesia / 中国内镜杂志

Objective To evaluate the feasibility and safety of thoracoscopic lung cancer surgery under non-tracheal intubation anesthesia. Methods Twenty patients with peripheral lung cancer were enrolled in experimental group and control group. Then monitored and recorded Systolic pressure (SBP), diastolic pressure (DBP), mean arterial pressure (MAP), heart rate (HR), electrocardiogram (ECG), heart rate (HR), Oxygen saturation (SpO2), Final moisture CO2 partial pressure (PETCO2), central venous pressure, invasive arterial blood pressure and blood glucose and the related complications like sore throat, hoarse voice, nausea and so onin such time points: before induction (T0), induction of intubation (T1), operation (T2), and sudden removal (T3) of the two groups. Results The laryngeal mask group was given a smaller stimulus to the cardiovascular system during anesthesia.The time of feeding, the exhaust, the time of getting out of bed, the average hospitalization day, the reduction of hospitalization expenses, pharynx, respiratory and cardiovascular complications were shorter and less than intubation group. Conclusion The laryngeal mask ventilation intravenous anesthesia with thoracic vagal nerve block in the thoracoscopic lobectomy is simple, safe, no intubation-related complications and single lung ventilation lung injury, in line with surgery -anesthesia overall minimally invasive development concept, worthy of clinical promotion.