Recent Advance of Stainless Steel Used In Non-active Surgical Implantable Medical Device and Regulatory Perspective / 中国医疗器械杂志

Stainless steel has been widely used in non-active surgical implantable medical device of cardiovascular, orthopedics, dental and ophthalmology. In this paper, we mainly focused on development of stainless steel, as well as the material-related standard evolution. We further summarized the recent advancement of stainless steel use in surgical implantable medical device. Insight and regulatory perspective has been further demonstrated.

Silk fibroin/collagen composite hydrogels with different matrix stiffness influence the growth and phenotype of human mammary epithelial cells / 生理学报

Extracellular matrix (ECM) stiffness is closely related to the physiological and pathological states of breast tissue. The current study was aimed to investigate the effect of silk fibroin/collagen composite hydrogels with adjustable matrix stiffness on the growth and phenotype of normal breast epithelial cells. In this study, the enzymatic reaction of horseradish peroxidase (HRP) with hydrogen peroxide (H2O2) was used to change the degree of cross-linking of the silk fibroin solution. The rotational rheometer was used to characterize the composite hydrogel's biomechanical properties. Human normal mammary epithelial cell line MCF-10A were inoculated into composite hydrogels with various stiffness (19.10-4 932.36 Pa) to construct a three dimensional (3D) culture system of mammary epithelial cells. The CCK-8 assay was applied to detect the cell proliferation rate and active states in each group. Hematoxylin-Eosin (HE) staining and whole-mount magenta staining were used for histological evaluation of cell morphology and distribution. The results showed that with the increase of matrix stiffness, MCF-10A cells exhibited inhibited proliferation rate, decreased formation of acinus structures and increased branching structures. Meanwhile, with the increase of matrix stiffness, the polarity of MCF-10A cells was impeded. And the increase of matrix stiffness up-regulated the expression levels of mmp-2, mmp-3, and mmp-9 in MCF-10A cells. Among the genes related to epithelial-mesenchymal transition (EMT), the expression level of the epithelial marker gene E-cadherin was significantly down-regulated, while the interstitial cell marker gene Vimentin was up-regulated, and the expression levels of Snail, Wnt5b and Integrin β1 in the Wnt pathway were up-regulated. These results suggest that the silk fibroin/collagen composite hydrogels with adjustable matrix stiffness regulates the proliferation and the phenotype of MCF-10A cells. The effects of increased matrix stiffness may be closely related to the changes of the polar structures and function of MCF-10A cells, as well as the occurrence of ECM-remodeling and EMT.

Spindle cell hemangioma: a clinicopathological and molecular analysis of eight cases / 中华病理学杂志

Objective: To investigate the clinicopathological and genetic characteristics of spindle cell hemangioma (SCH). Methods: The clinical, morphological and immunohistochemical features of 8 SCHs diagnosed from January 2013 to September 2021 in West China Hospital, Sichuan University, Chengdu, China were retrospectively analyzed. Hotspot mutations for IDH1 codon 132 and IDH2 codon 172 were tested in 4 SCHs and 29 other non-SCH lesions using Sanger sequencing. Results: The 8 cases occurred in patients with a wide age range, from neonate to 46 years (mean 28 years, median 32 years). Both genders were equally affected. The course of the disease spanned from half a year to 31 years. Two SCHs were recurrent tumors. All tumors involved the distal extremities (4 of foot, 2 of ankle and 2 of hand). Six cases were presented as a single lesion and 2 cases as multiple lesions. The tumor diameters were 1-5 cm. All the 8 SCHs were typically composed of cavernous vascular space and solid components consisting of slit-like vessels, spindle cells and epithelioid endothelial cells which often exhibited cytoplasmic vacuolation. These two alternating components and the vacuolated epithelioid endothelial cells were the distinctive diagnostic clues for SCH. Vascular endothelial cells including epithelioid cells in the solid areas expressed CD31 (8/8), ERG (4/4), CD34 (5/8) and D2-40 (2/3). The spindle cells expressed SMA (8/8). Neither endothelial cells nor spindle cells expressed HHV8 (0/7), Desmin (0/5) or S-100 (0/3). Mutations were revealed in 2 SCHs, with IDH1 mutation (p.R132C) and IDH2 mutation (p.R172G), respectively. The IDH1/2 gene hotspot mutations were not found in the remaining 2 SCHs or the other 29 non-SCH lesions. Simple excisions were performed for 7 cases, and partial resection for 1 case. Follow-up information was obtained in 6 cases, with follow-up time ranging from 5 to 90 months (average, 46 months). No metastasis occurred in the 6 cases. No recurrence occurred in cases treated with simple excision. The residual lesions of the patient who received partial resection were stable. Conclusions: SCH is rare and should be differentiated from a variety of benign and malignant vascular lesions. An accurate diagnosis of SCH is clinically important and can be achieved by combining clinical information and typical pathological presentation. IDH1/2 gene hotspot mutations are specific to SCH in vascular lesions. Genetic detection is helpful in the diagnosis of challenging cases.

Anwulignan alleviates liver damages in exhausted mice by activating NRF2 / 药学学报

Excessive exercise makes the body consume more oxygen and produce excessive free radicals. The increased free radicals lead to oxidative stress injury and dysfunctions in liver tissue. Our previous study showed that Anwulignan, an active monomer in Schisandra sphenanthera Rehd. et Wils. (Schisandra), had anti-fatigue effects in mice. However, whether Anwulignan has a protective effect on liver damage in exhausted mice and the mechanism underlying remain elusive. An exhaustive swimming mice model was used to study the protective effects of Anwulignan on liver damage. The involvement of the nuclear factor (erythroid-derived 2)-like 2 (NRF2)/antioxidant responsive element (ARE) antioxidative pathway in Anwulignan-mediated anti-fatigue was analyzed using NRF2 inhibitor ML385 in HepG2 cells treated with H2O2. Animal welfare and experimental process follow the regulations of the Animal Ethics Committee of Beihua University. Anwulignan significantly lowered serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels, reduced liver tissue damages, increased superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT), and decreased malondialdehyde (MDA) and 8-hydroxy-2 deoxyguanosine (8-OHdG) contents in the livers of exhausted mice, demonstrating a strong antioxidant effect. Furthermore, Anwulignan up-regulated the NRF2/ARE antioxidant pathway in liver tissue, increased B-cell lymphoma 2 (Bcl-2) expression, and decreased Bcl-2-like protein 4 (Bax) and caspase3 expression. In HepG2 cells, Anwulignan improved the cell viability and SOD activity, reduced reactive oxygen species (ROS) and MDA contents, up-regulated the expression of the NRF2/ARE signaling pathway and Bcl-2, and decreased Bax and caspase3 expression in the cells. Furthermore, pretreated ML385 partly abolished all these effects of Anwulignan. Anwulignan protects the liver from damage in the exhausted mice by its antioxidant effects and related to its activation of the NRF2 pathway.

Variation analysis of genes associated with Usher syndrome type 1 in 136 Chinese deafness families / 中华耳鼻咽喉头颈外科杂志

Objective: To investigate the variation of genes associated with Usher syndrome type 1(USH1)in 136 Chinese deafness families from Henan province. Methods: The data of 136 deafness families tested by next-generation sequencing(NGS) which identified in the center of genetics and prenatal diagnosis of the First Affiliated Hospital of Zhengzhou University from November 2016 to December 2019 were analysized and the variation frequency of six genes related to Usher syndrome type 1(MYO7A, USH1C, CDH23, PCDH15, USH1G, CIB2) were summarized. Results: Five deafness families were detected nine pathogenic or likely pathogenic variations in two genes, accounting for 3.7% of all families. Among them, four families were caused by MYO7A variations and one family was caused by CDH23 variation. Meanwhile, seven variations of two genes were reported for the first time. They were c.313delG, c.5257dupA, c.5435A>T, c.5636G>C, c.5722T>G of MYO7A, and c.155_166del, c.4802delA of CDH23. The patients' vision of family 2 and family 3 had no obvious abnormality at present, but according to genetic diagnosis and walking dealy, they were considered to be USH1. Conclusions: MYO7A is the most common caustive gene associated with USH1 in Henan deafness patients, the application of next-generation sequencing technology can make USH1 patients diagnosed earlier before the visual symptoms appear.

Lung transplantation as therapeutic option in acute respiratory distress syndrome for coronavirus disease 2019-related pulmonary fibrosis / 中华医学杂志(英文版)

BACKGROUND@#Critical patients with the coronavirus disease 2019 (COVID-19), even those whose nucleic acid test results had turned negative and those receiving maximal medical support, have been noted to progress to irreversible fatal respiratory failure. Lung transplantation (LT) as the sole therapy for end-stage pulmonary fibrosis related to acute respiratory distress syndrome has been considered as the ultimate rescue therapy for these patients.@*METHODS@#From February 10 to March 10, 2020, three male patients were urgently assessed and listed for transplantation. After conducting a full ethical review and after obtaining assent from the family of the patients, we performed three LT procedures for COVID-19 patients with illness durations of more than one month and extremely high sequential organ failure assessment scores.@*RESULTS@#Two of the three recipients survived post-LT and started participating in a rehabilitation program. Pearls of the LT team collaboration and perioperative logistics were summarized and continually improved. The pathological results of the explanted lungs were concordant with the critical clinical manifestation, and provided insight towards better understanding of the disease. Government health affair systems, virology detection tools, and modern communication technology all play key roles towards the survival of the patients and their rehabilitation.@*CONCLUSIONS@#LT can be performed in end-stage patients with respiratory failure due to COVID-19-related pulmonary fibrosis. If confirmed positive-turned-negative virology status without organ dysfunction that could contraindicate LT, LT provided the final option for these patients to avoid certain death, with proper protection of transplant surgeons and medical staffs. By ensuring instant seamless care for both patients and medical teams, the goal of reducing the mortality rate and salvaging the lives of patients with COVID-19 can be attained.

Clinical analysis of 134 case of gallbladder stones complicated with gallbladder carcinoma / 中国基层医药

Objective:To investigate the relationship between gallbladder carcinoma and gallbladder stones, and provide theoretical basis for the prevention and treatment of gallbladder carcinoma.Methods:A case-control study was used to retrospectively analyze the clinical data of 134 patients(study group) with gallbladder stones and gallbladder carcinoma treated in the Xinjiang Uygur Autonomous Region Corps Hospital of Chinese People′s Armed Police Forces from January 2010 to December 2012.Another 134 patients with gallbladder stones were selected as control group, and the clinical characteristics of the two groups were compared.Results:The average age of patients in the study group was (60.5±11.7)years, which was significantly older than that in the control group [(49.6±10.3)years], the difference was statistically significant ( t=7.916, P<0.05). The history of gallbladder stones in the study group and control group were (9.3±4.1)years and (4.6±2.5)years, respectively, and the difference between the two groups was statistically significant( t=11.682, P<0.01). The multiple stones, maximum stone diameter and maximum gallbladder wall thickness in the study group were 75 cases, (2.4±0.6)cm and (0.59±0.16)cm, respectively, which in the control group were 46 cases, (1.3±0.5)cm and (0.87±0.23)cm, respectively, the differences between the two groups were statistically significant(χ 2=3.978, t=6.217, 5.110, all P<0.05). The incidences of cholecystitis and jaundice in the study group were higher than those in the control group, and the differences were statistically significant(all P<0.05). Conclusion:Gallbladder stones are one of the causative factors of gallbladder carcinoma.Early diagnosis of gallbladder carcinoma is difficult.Patients with high-risk gallbladder stones who are old, have a long history of gallbladder stones, multiple stones, large stone diameters, and thick gallbladder walls should actively undergo surgical intervention.

Clinical manifestations and genetics analysis of collagen type Ⅵ-related myopathy caused by variants in COL6A3 gene / 中华儿科杂志

Objective@#To summarize the clinical manifestations and determine the molecular etiology for two collagen type Ⅵ-related myopathy pedigrees.@*Methods@#Two spontaneous collagen type Ⅵ-related myopathy patients were admitted to Department of Neurology, Children′s Hospital, Capital Institute of Pediatrics in October 2017. Clinical data of probands and their family members were collected and their genomic DNA was obtained for genetic testing. Next generation sequencing was performed and the variants were verified by the Sanger sequencing in the family members.@*Results@#Target region sequencing indicated that the proband of family 1 has carried a heterozygous variant of COL6A3 gene, c.6229G>C(p.Gly2077Arg), and it was de novo variant confirmed by Sanger-sequencing in the family.The patient 1, a 2-year-three-month old boy, was admitted due to motor retardation at birth. He was defined as early severe Ullrich congenital muscular dystrophy. He never achieved independent ambulation, he had onset of symptoms was found at birth, including diffuse muscle weakness, striking distal joint hyperlaxity, proximal contractures, calcaneal protrusion, kyphosis, and hip dislocation. Serum CK level was elevated slightly and EMG showed neurogenic changes. The patient 2, a 7-year-old girl with a limp for 4 years, carried one de novo variant of COL6A3 gene,c.5169_5177del (p.Glu1724_Leu1726del). This variant results in the deletion of amino acids (1724 to 1726) in α3 chain of collagen Ⅵ, which may disturb the function of this protein.She was diagnosed as Bethlem myopathy with a mild phenotype. She had delayed motor milestones and presented with walking on tiptoe, hypotonia, and ithylordosis. The contracture of proximal joints was not very obvious. Serum CK level was normal and EMG showed myogenic changes.Muscle biopsy revealed muscular dystrophy and muscle magnetic resonance imaging of patient 2 showed vastus lateral is a "sandwich" sign. Immunofluorescence staining for COL6A3 chain in the cultured skin fibroblasts from patients 2 showed decreased deposition compared with control.@*Conclusions@#These two patients were diagnosed as spontaneous collagen type Ⅵ-related myopathy and carried different variants of COL6A3 gene. Different in pathogenetic variants could cause different genetic features and different phenotypes. Collagen type Ⅵ- related myopathy patients have various clinical manifestations. Typical phenotypes include muscular dystrophies, proximal contractures, and distal hyperlaxity. Muscle MRI shows diffuse fatty infiltration of gluteus maximus and thigh muscle. The histological staining showed the low level expression of COL6A3 chain. The seventy of phenotype was related to the genotype.

Clinical efficacy of percutaneous nephroscopy in the treatment of retroperitioneal abscess after common bile duct exploration / 中华消化外科杂志

Objective To investigate the clinical efficacy of percutaneous nephroscopy in the treatment of retroperitioneal abscess after common bile duct exploration.Methods The retrospective and descriptive study was conducted.The clinical data of 13 patients with retroperitioneal abscess after common bile duct exploration who were admitted to Xinjiang Autonomous Region Hospital of Chinese People's Armed Forces between January 2004 and December 2018 were collected.There were 5 males and 8 females,aged from 34 to 81 years,with an average age of 57 years.All the 13 patients underwent debridement and drainage for retroperitioneal abscess under percutaneous nephroscope.Observation indicators:(1) surgical and postoperative situations;(2) follow-up.Follow-up was performed using outpatient examination and telephone interview to detect postoperative choledocholithiasis recurrence up to September 2019.Measurement data with skewed distribution were represented as M (range).Count data were described as absolute numbers.Results (1) Surgical and postoperative situations:all the 13 patients underwent successfully debridement and drainage for retroperitioneal abscess under percutaneous nephroscope,without kidney injury,pancreatic damage,vascular injury or peritoneal damage.There were 11 cases with 1 drainage tube,and 2 cases with 2 drainage tubes.The operation time,volume of intraoperative pus extracted,time to body temperature resuming to normal of 13 patients were 41 minutes (range,24-77 minutes),241 mL (range,110-640 mL),1.5 days (range,1.0-4.0 days),respectively.The time to postoperative removal of drainage tube of 13 patients was 42 days (range,5-94 days),in which the time to postoperative removal of drainage tube at right iliac region was 5 days and 11 days in 2 patients,and at lower back was 23-94 days in 11 patients,respectively.Duration of postoperative hospital stay was 42 days (range,26-67 days).All the 13 patients had pleural effusion disappeared,and were cured and discharged.(2) Follow-up:13 patients were followed up for 6-48 months,with a median time of 18 months.No recurrence occurred.Conclusion The treatment with percutaneous nephroscopy is safe and effective for retroperitioneal abscess after common bile duct exploration.

Clinical efficacy of percutaneous nephroscopy in the treatment of retroperitioneal abscess after common bile duct exploration / 中华消化外科杂志

Objective@#To investigate the clinical efficacy of percutaneous nephroscopy in the treatment of retroperitioneal abscess after common bile duct exploration.@*Methods@#The retrospective and descriptive study was conducted. The clinical data of 13 patients with retroperitioneal abscess after common bile duct exploration who were admitted to Xinjiang Autonomous Region Hospital of Chinese People′s Armed Forces between January 2004 and December 2018 were collected.There were 5 males and 8 females, aged from 34 to 81 years, with an average age of 57 years. All the 13 patients underwent debridement and drainage for retroperitioneal abscess under percutaneous nephroscope. Observation indicators: (1) surgical and postoperative situations; (2) follow-up. Follow-up was performed using outpatient examination and telephone interview to detect postoperative choledocholithiasis recurrence up to September 2019. Measurement data with skewed distribution were represented as M (range). Count data were described as absolute numbers.@*Results@#(1) Surgical and postoperative situations: all the 13 patients underwent successfully debridement and drainage for retroperitioneal abscess under percutaneous nephroscope, without kidney injury, pancreatic damage, vascular injury or peritoneal damage. There were 11 cases with 1 drainage tube, and 2 cases with 2 drainage tubes. The operation time, volume of intraoperative pus extracted, time to body temperature resuming to normal of 13 patients were 41 minutes (range, 24-77 minutes), 241 mL (range, 110-640 mL), 1.5 days (range, 1.0-4.0 days), respectively. The time to postoperative removal of drainage tube of 13 patients was 42 days(range, 5-94 days), in which the time to postoperative removal of drainage tube at right iliac region was 5 days and 11 days in 2 patients, and at lower back was 23-94 days in 11 patients, respectively. Duration of postoperative hospital stay was 42 days (range, 26-67 days). All the 13 patients had pleural effusion disappeared, and were cured and discharged. (2) Follow-up: 13 patients were followed up for 6-48 months, with a median time of 18 months. No recurrence occurred.@*Conclusion@#The treatment with percutaneous nephroscopy is safe and effective for retroperitioneal abscess after common bile duct exploration.

Phacoemulsification combined with goniosynechialysis treating cataract with acute angle-closure glaucoma / 国际眼科杂志(Guoji Yanke Zazhi)

@#AIM: To analyze the clinical effect and security of phacoemulsification combining goniosynechialysis to treat cataract accompanied with acute angle-closure glaucoma. <p>METHODS: The clinical data of totally 45 patients(48 eyes)with cataract and acute angle-closure glaucoma was retrospectively analyzed, including 28 patients(30 eyes)treated with phacoemulsification with goniosynechialysis(the study group)and 17 patients(18 eyes)treated with phacoemulsification with trabeculectomy(the control group). The visual acuity, intraocular pressure, iridocornealis, central anterior chamber depth and complications were compared between groups. <p>RESULTS: Before surgery, there was no significant difference in best corrected visual acuity and iridocornealis angle between groups(<i>P</i>>0.05). At 7d, 1mo, 3mo, 6mo and 1a after surgery, the best corrected visual acuity of both groups increased, and the study group was higher than the control group; the iridocornealis angle close degree of both groups decreased, and the study group was lower than the control group(<i>P</i><0.05). Both groups and time had an effect on intraocular pressure and chamber depth of patients(<i>P</i><0.05), and there was no reciprocal action between the two factors(<i>P</i>>0.05). Compare in groups: 7d, 1mo, 3mo, 6mo and 1a after surgery, the intraocular pressure of both groups decreased, and at 3mo, 6mo and 1a after surgery, the study group was lower than that at 7d after surgery(<i>P</i><0.05), the control group was similar to that at 7d after surgery(<i>P></i>0.05). At 7d, 1, 3, 6mo and 1a after surgery, the chamber depth of both groups were higher than 1d before surgery, 3, 6mo and 1a after surgery, the study group was similar to that at 7d after surgery(<i>P></i>0.05), the control group after 12mo was lower than that at 7d after surgery(<i>P<</i>0.05). Compare between groups: Before treatment, 7d, 1, 3 and 6mo after treatment, there was no significant difference between groups in intraocular pressure(<i>P</i>>0.05); at 1a after surgery, IOP of the study group was lower than the control(<i>P</i><0.05). Before treatment, there was no significant difference between groups in anterior chamber depth(<i>P></i>0.05); at 3, 6mo and 1a after surgery, the study group was higher than the control group(<i>P</i><0.05). <p>CONCLUSION: Phacoemulsification combined with goniosynechialysis is effective to treat acute angle-closure glaucoma, with prominent long-term efficacy and the risk is not increased.

Measurement of Key Elements in Rare Earth Alloy by Pulsed Glow Discharge Mass Spectrometry / 分析化学

Pulsed glow discharge mass spectrometric(Pulsed-GDMS) method for the measurement of 7 kinds of key elements(Mg,Fe,Cu,La,Ce,Pr and Nd) in rare earth alloys was established. The influence factors of measurement repeatability, such as pulse time, sample homogeneity, anode cap, flow tube, corn, and sample tablet density were systematically studied. The results showed that,for elements with mass fraction of more than mg/g, the parts (anode cap, flow tube and corn) had the largest influence on measurement repeatability. When the new graphitic parts were used and no parts were changed during the whole measurement,the relative standard deviation (RSD) was less than 3%. However, the RSD were 2%-11%and 3%-21% when the new graphitic parts and the reusable parts were used and changed,respectively. The second influence factor of measurement repeatability was the tablet density. The results showed that,the lower the density,the worse the measurement repeatability, and for the dense tablet, the RSD was less than 3%. Key elements in 1# rare earth alloy were measured by high resolution inductively coupled plasma-mass spectrometry (HR-ICP-MS), and the analytical results were used as reference values for the calibration of Pulsed-GDMS. The relative sensitivity factors (RSF) were obtained, and the key elements in 2# rare earth alloy were measured by Pulsed-GDMS after calibration. The analytical results of key elements in 2#sample by Pulsed-GDMS and HR-ICP-MS were compared, and the results showed that for the dense sample, the analytical results showed good agreement. Under the optimal conditions, the expanded uncertainty of measurement by Pulsed-GDMS reduced to 3%-10%.

Association between coronary heart disease and methylenetetrahydrofolate reductase polymorphism / 中国基层医药

Objective To explore the correlation between the pathogenesis of coronary heart disease and the polymorphism of methylenetetrahydrofolate reductase ( MTHFR ) .Methods 130 cases of coronary heart disease diagnosed and treated in Heze Municiple Hospital from July 2015 to July 2017 were selected as observation group .At the same time,130 healthy people were selected as control group .The serum folate and homocysteine ( HCY) levels were compared between the two groups .At the same time, polymerase chain reaction -restriction fragment length polymorphism was used to analyze the MTHFR gene polymorphisms .The distribution of MTHFR gene polymorphism was compared between the two groups .Results The level of serum folic acid in the observation group was (5.76 ± 2.14)g/L,which was significantly lower than (7.34 ±2.43)g/L in the control group (t=5.64,P<0.05).The level of serum HCY in the observation group was (15.46 ±5.74)μmol/L,which was significantly higher than (10.28 ± 4.38)μmol/L in the control group (t=6.43,P<0.05).The frequencies of TT type,TC type and CC type of MTHFR gene in the observation group were 36.92％,46.92％and 16.15％,respectively.The frequencies of TT type,TC type and CC type of MTHFR gene in the control group were 21.54％,55.38％ and 23.08％,respectively.The frequency of TT type in the observation group was significantly higher than that of the control group (χ2 =8.25,P<0.05). There were no statistically significant differences in folic acid levels among different gene types in the observationgroup(t=1.31,0.55,0.73,all P>0.05),but the serum HCY level of TT type was significantly higher than that of CT type and CC type in the observation group (t=5.33,4.62,all P<0.05).Conclusion Serum folic acid level, HCY level and homozygous mutations of MTHFR gene type have certain relationship with the occurrence of coronary heart disease ,the body serum folic acid level and the distribution of MTHFR genotypes can affect the concentration of HCY,thus affecting the occurrence of coronary heart disease .

Study on HPLC digital fingerprint of Paeonia suffruticosa and determination of eight components / 中草药

Objective: To establish an HPLC digital fingerprint for flower petals of Danfeng (Paeonia ostii), and apply it in the determination of other six varieties of P. suffruticosa produced in Heze areas, while determining the contents of eight components in the flower petals. Methods: Nano-Micro C18 (250 mm × 4.6 mm, 5 μm) column was adopted and the gradient mobile phase consisted of acetonitrile (A)-0.1% formic acid (B) with a flow rate of 1.0 mL/min, the detective wavelength was 270 nm, and the column temperature was 25 ℃. Results: The chromatographic fingerprint similarity evaluation system for traditional Chinese medicines was used for analysis. The chromatographic fingerprint similarity of six batches of Danfeng samples was more than 0.993. There were altogether 14 common peaks, and eight of them were identified. A comparative analysis showed a similarity between samples of Danfeng and other six varieties produced in Heze. Meanwhile, the content of eight major chemical constituents, namely gallic acid, methyl gallate, kaempferol-3-O-β-D-glucopyranoside, apigenin-7-O-β-D-glucopyranoside, apigenin-7-O-β-D-neospheroside, dihydrokaempferol-7-O-β-D-glucopyranoside, paeoniflorin, and oxypaeoniflorin were determined in the range of 0.05-1.41, 1.01-4.41, 0.70-5.55, 4.60-18.30, 10.05-33.87, 0.09-1.76, 3.16-11.12, 0.85-2.02 mg/g. Conclusion: The combination of HPLC digital fingerprint and content determination could reflect its inherent quality in an all-round way, which provided scientific basis for the quality evaluation of P. suffruticosa.

Clinical manifestations and prenatal diagnosis of congenital muscular dystrophy / 中华围产医学杂志

Objective To summarize the clinical features of 22 probands diagnosed with congenital muscular dystrophy (CMD),and to provide genetic counseling and prenatal diagnosis for 23 fetuses of these pedigrees.Methods Data of 22 CMD patients who were treated in the Pediatric Department of Peking University First Hospital during October 2006 to March 2016 were analyzed.Informed written consents for participation in this study were obtained from the parents or guardians.Prenatal diagnosis was performed using DNA samples extracted from fetal villus cells of 12 cases at 11-13 gestational weeks and amniotic fluid of 11 cases at 18-22 gestational weeks.Direct DNA sequencing by polymerase chain reaction (PCR) and multiplex ligation-dependent probe amplification (MLPA) were used to detect CMD-related gene mutations.Linkage analysis of short tandem repeats (STRs) was used to identify maternal blood contamination and biological parents.Results Thirteen out of the 22 probands with CMD were diagnosed with congenital muscular dystrophy type 1 A (MDC1A),and all of them carried compound heterozygous mutations in LAMA2 gene.Prenatal diagnosis of 13 fetuses from these pedigrees found that four fetuses were wild-type,seven were heterozygotes and two carried the same mutations as their proband.Three probands with LMNA-related congenital muscular dystrophy (L-CMD) carried de novo mutations in LMNA gene.In these pedigrees,two fetuses were wild-type and one whose mother was mosaicism carried the same mutations as the proband.One proband with Ullrich congenital muscular dystrophy carried compound heterozygous mutations in COL6A2 gene and the fetus of the same pedigree was wild-type.Five probands were diagnosed with α-dystroglycanopathies.And among them,two cases of muscle-eye-brain disease (MEB) carried compound heterozygous mutations in POMGnT1 gene and the fetuses of the two peidgrees were heterozygotes;one case of congenital muscular dystrophy type 1C (MDC1C) had compound heterozygous mutations in FKRP gene and the fetus carried the same mutations;one patient diagnosed with POMGnT1-related congenital muscular dystrophy with mental retardation (CMD-MR) carried compound heterozygous mutations in POMGnT1 gene,and the fetus was positive for the same mutations;one proband with POMT1-related CMD-MR was positive for compound heterozygous mutations in POMT1 gene and the results of prenatal diagnosis for two fetuses of this pedigree showed that the first fetus had the same mutations as the proband,while the second was heterozygote.Conclusions No effective therapeutic method is available for CMD.Therefore,accurate genetic counseling and prenatal diagnosis are necessary to prevent CMD child from birth.

Correlation between Expression of Signal Transducer and Activator of Transcription 3 and Pituitary Adenoma Subtypes / 中国医学科学院学报

<p><b>OBJECTIVE</b>To investigate the correlation between signal transducer and activator of transcription 3 (STAT3) expression and pituitary adenoma subtypes.</p><p><b>METHOD</b>The STAT3 expression profiles in different pituitary adenomas from 74 patients were determined using quantificational real-time polymerase chain reaction,Western blot,and immunohistochemistry.</p><p><b>RESULTS</b>Expression of STAT3 was observed in all pituitary adenoma subtypes. The STAT3 expression level was highest in growth hormone adenoma when compared with other tumors including prolactin,follicle-stimulating hormone/luteinizing hormone-secreting adenoma,and adrenocorticotrophic hormone-secreting adenoma. The follicle-stimulating hormone/luteinizing hormone adenomas exhibited the lowest STAT3 expression levels.</p><p><b>CONCLUSION</b>STAT3 is differentially expressed in pituitary adenoma subtypes, suggesting the cell-specific features of STAT3 regulation,although further investigations are still warranted to clarify the underlying mechanisms.</p>

Planting area estimation of Chinese Tibetan medicine Herpetospermum pedunculosum based on RS&GIS-by case study of Lengqi and Xinglong town in Luding county / 中国中药杂志

The herbs used as the material for traditional Chinese medicine are mostly planted at mountain areas where there is appropriate weather condition. Due to the complex terrain condition in mountain area, the planting at such places is always associated with a scattered pattern, which inevitably bring difficulty to the work of accurate measurement for the planting area. Advanced research about monitoring the planting area for medicine-herb under complex environmental condition is so critical and meaningful for developing the medicine-herb planting to a large scale and an industry. Therefore, this research, taking the planting of Herpetospermum pedunculosum in Luding county as an example, utilizes RS&GIS: using the image data from TM and ETM datum as the remote sensing information source, integrating GPS data from quadrat survey on the spots, and analyzing on a GIS platform, to extract the planting area of H. pedunculosum in Luding county. The results indicate that: (1) the method and technology used to estimate the planting area of H. pedunculosum are feasible and can be applied to monitoring the planting area of medicine-herb at mountain area under complex environmental conditions: (2) the planting area of H. pedunculosum in Luding county is estimated to be 857. 246 acres by the methods utilized in this research, which is closed to the value from local statistical data with an error range less than 5%; (3) in consideration of those inevitable errorrs generating from the procedures such as remote sensing data acquisition, data preprocessing, data interpretation, and so on, and the fact that the classification of remote sensing data, which must be implemented by those above procedures, was used directly to extract the herb type, the accuracy of area estimation for the herb is significantly influenced by the accuracy of classification for herb type, and the estimated area is inevitably associated with some error.

Clinical and genetic analysis of a Chinese family with Walker-Warburg syndrome / 中华实用儿科临床杂志

Objective To analyze the clinical,molecular and genetic features of a Chinese family with WalkerWarburg syndrome(WWS).Methods The clinical data of the proband and his family members were collected.Genomic DNAs from the patient and his parents were extracted with standard procedures from the peripheral blood leukocytes.Polymerase chain reaction and DNA direct sequencing were employed to analyze all of the 20 exons of the POMT1 gene to determine the mutation,and the relationship between genotype and phenotype was analyzed.Results The proband presented with delayed psychomotor development,muscle hypotonia and early joint contractures,his serum creatine kinase was elevated moderately and the brain magnetic resonance imaging (MRI) displayed brain structural malformations,cerebellar cyst,bilateral dilatation of the lateral ventricle,cerebellum and brainstem dysplasia.Further genetic testing detected a compound heterozygous mutation of c.313C ＞ T,p.Arg105Cys inherited from his father,a frameshift mutation c.2208delG,p.Trp736X inherited from his mother,both of which were known as pathogenic mutations.Conclusions According to the study,the proband carried compound heterozygous mutation of POMT1 gene,and his parents were heterozygous carriers,which is consistent with autosomal recessive inheritance.The child is definitely diagnosed as WWS.Genetic counseling and prenatal diagnosis are available for this family.

Clinical and molecular genetic analysis of a family with normokalemic periodic paralysis / 中华儿科杂志

<p><b>OBJECTIVE</b>Periodic paralysis (PP) is one type of skeletal muscle channelopathies characterized by episodic attacks of weakness. It is usually classified into hyperkalemic periodic paralysis (HyperPP), hypokalemic periodic paralysis (HypoPP) and normokalemic periodic paralysis (NormoPP) based on the blood potassium levels. HypoPP is the most common type of these three and NormoPP is the rarest one. The aim of this study was to explore the clinical and genetic features of a Chinese family with normokalemic periodic paralysis (NormoKPP).</p><p><b>METHOD</b>Clinical features of all patients in the family with NormoKPP were analyzed. Genomic DNA was extracted from peripheral blood leukocytes and amplified with PCR. We screened all 24 exons of SCN4A gene and then sequence analysis was performed in those who showed heteroduplex as compared with unaffected controls.</p><p><b>RESULT</b>(1) Fifteen members of the family were clinically diagnosed NormoKPP, and their common features are: onset within infacy, episodic attacks of weakness, the blood potassium levels were within normal ranges, high sodium diet or large dosage of normal saline could attenuate the symptom. One muscle biopsy was performed and examination of light and electronic microscopy showed occasionally degenerating myofibers. (2) Gene of 12 patients were screened and confirmed mutations of SCN4A genes--c. 2111 T > C/p. Thr704Met.</p><p><b>CONCLUSION</b>The study further defined the clinical features of patients with NormoKPP, and molecular genetic analysis found SCN4A gene c. 2111 T > C/p. Thr704Met point mutation contributed to the disease. In line with the autosomal dominant inheritance laws, this family can be diagnosed with periodic paralysis, and be provided with genetic counseling. And the study may also help the clinical diagnosis, guide treatment and genetic counseling of this rare disease in China.</p>

Effect of coenzyme Q10 on the expression of tumor necrosis factor-α and interleukin-10 in gingival tissue of experimental periodontitis in rats / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the effect of coenzyme Q10 on the levels of tumor necrosis factor-α(TNF-α) and interleukin-10 (IL-10) in gingival tissue of experimental periodontitis in rats.</p><p><b>METHODS</b>A total of 48 healthy Wistar rats were divided into 3 groups of 16 randomly, normal group, coenzyme Q10 treatment group (Q10 group) and periodontitis group.Normal group was fed with normal diet and water. Periodontitis models were established in other two groups.Q10 group received coenzyme Q10 for 12 weeks and periodontitis group was fed with the same dose of normal saline.Four rats in each group were sacrified before administration and 4, 8 and 12 weeks after administration. Gingival tissue samples from mandiblar first permanent molar were taken. The levels of TNF-α and IL-10 were detected by immunohistochemistry.</p><p><b>RESULTS</b>The expression of TNF-α in periodontitis group [54.9% (52.9%, 57.3%)] was significantly higher than that in Q10 group [15.1% (12.7%, 17.5%)] at 12 weeks (P < 0.0167) . The expression of IL-10 in periodontitis group [8.9% (7.9%, 10.0%)]was significantly lower than that in the Q10 group [38.9% (38.0%, 40.4%)] (P < 0.0167) . The expression of TNF-α in periodontitis group was significantly higher than that in Q10 group at 12th weeks (P < 0.0167) . The expression of IL-10 in periodontitis group was significantly lower than that in the Q10 group (P < 0.0167).</p><p><b>CONCLUSIONS</b>Coenzyme Q10 inhibits the expression of TNF-α and promotes the expression of IL-10 in periodontal tissues of experimental periodontitis rats. Coenzyme Q10 may play a role in treating periodontitis.</p>