OBJECTIVETo investigate the differences in the development of primordial germ cells (PGCs) between male and female mouse embryos.

METHODSThe morphological changes of genital ridge development were detected in C57BL/6J mouse embryos of 11-13.5 days, and the changes of PGCs quantity and proliferation were compared between the male and female embryos using immunofluorescence histochemistry.

RESULTSThe PGCs was the most numerous at 13.5 days in male and female embryos, and the quantity of proliferating PGCs reached the maximum at 13 days. The quantity of PGCs and proliferating PGCs in male embryos at 13 days was significantly larger than that in female embryos.

CONCLUSIONThe development of PGCs is characterized by a gender differences in early development of mouse embryos (11-13.5 days).

Animals ; Cell Proliferation ; Embryo, Mammalian ; cytology ; Female ; Gene Expression Regulation, Developmental ; Germ Cells ; cytology ; Male ; Mice ; Mice, Inbred C57BL ; Ovary ; cytology ; Sex Factors ; Testis ; cytology

To study the lead excretion effect of the chelator Zn-DTPA on the lead intoxication mice, inductively coupled plasma mass spectrometry (ICP-MS) was applied to detect the lead content of biological samples. The acute lead intoxication mice model was established by injecting lead acetate intraperitoneally with the dose of 1 mg. Zn-DTPA was administered intraperitoneally to mice once daily for five consecutive days 4 h after intoxication. Control group, model group, combination of Zn-DTPA and Ca-DTPA group were evaluated at the same time. The urine was collected every day. The mice were sacrificed in batches in the 2rd, 4th, 6th day. Biological samples including urine, whole blood, femur and brain were prepared and nitrated. Lead concentration was detected by ICP-MS. The result showed that Zn-DTPA could increase lead content in urine markedly and reduce lead content in blood, femur and brain.
Animals ; Chelating Agents ; pharmacology ; Lead ; pharmacokinetics ; urine ; Lead Poisoning ; drug therapy ; Mass Spectrometry ; Mice ; Pentetic Acid ; pharmacology

Objective To analyze the antibiotic resisitance of clinic iso-lated bacteria in Beijing Hospital from 2005 to 2008.Methods Making antibiotic sensitivity test of total 9005 strains isolated from patients in Bei-jing Hospital from 2005 to 2008 with K-B method;analyzing the data with Whonet 5.4 system.Results The total strains of gram negative ba-cilli were more than gram positive coccus.There are 19 Penicillin non-susceptible S.pneumoniae(PRSP).As to hemolytic streptococcus,none of them was resistant to penicillin.The β-lactamase producing rate of Haemophilus influenzae was decreased from 13% in 2005 to 4.5% in 2008.During 2008.the methicillin-resistant Staphylococcus aureus (MRSA)was 76.8%and that of methicillin-resistant coagulase-nage-tire Staphylococcus(MRSCoNS)was 69.0%.Vancomycin and linezolid resistance strains did not appear.The resistance rate of Enterococcus fae-cium was higher than that of Enterococcus faecalis.The resistant rates of Enterococcus.to vancomycin and teicoplanin had increasing tendency.The detection rate of extended-spectrum beta-lactamases(ESBLs)to E. coli Was 43.0%.21.3%,52.0%and 52.6%in 4 years.The detection rates of ESBLs to Klebiella pneumonia Was 15.0% 25.9%.18.3% and 25.0%.Multi-antibiotic resistant strains of Pseudomonas aerugirlosa and Acineto-bacter appeared.Conclusion In order to study the resistance and its tendency of bacteria isolated from patients in Beijing Hospital and offer the theory to clinicalians for experienced treat.

Objective To determine the value of 2-18F-2-deoxy-β-D-glucose (18F-FDG)PET/CT in malignancy tumor detection of patients suspected as having paraneoplastic syndrome (PNS).Methods The clinical data of 54 patients suspected as having PNS, underwent PET/CT study in our hospital fiom June 2007 to December 2009, were retrospectively analyzed. The efficacy of 18F-FDG PET/CT on positive detection rate, positive predictive value of malignant tumors and on the detection of malignant tumor markers were analyzed with the results of pathological findings and clinical data;whether the course of disease could affect these detection was also analyzed. Results Positive results of 18F-FDG PET/CT were noted in 17 patients (31.5%), and 13 of them were confirmed as malignant tumors with pathological results. The positive predictive value of 18F-FDG PET/CT was 76.5%. The durations of patients with malignancies were not different from those of patients without malignancies.PET/CT enjoyed a significantly higher efficacy rate in identifying malignant tumors in patients with elevated tumor markers than in patients with tumor markers in normal range (P＜0.05). Conclusion 18F-FDG PET/CT improves the tumor detection rate in PNS suspects, especially in patients enjoying elevated tumor markers.

Purpose::To discuss and share the experience of treatment of traumatic innominate arterial injury.Methods::A retrospective analysis was performed on patients with innominate arterial injuries admitted from January 2016 to July 2018 at the department of vascular surgery, Beijing Jishuitan Hospital, China. All the arterial injuries were confirmed by arteriography. Clinical data including mechanism of injury, type of injury, demographics, concomitant injuries, time interval from trauma to blood flow reconstruction, and operation methods were collected. Follow-up program included outpatient visit and duplex-ultrasonography. SPSS version 23.0 was adopted for data analysis. Categorical variables are presented as number and/or frequency and continuous variables as mean ± standard deviation.Result::Altogether 7 patients were included and 6 (85.7%) were male. The mean age of patients was (29.43 ± 7.98) years, range 19-43 years. Six patients had isolated innominate arterial injuries and the rest 1 combined innominate arterial and vein injuries. The injury causes were road accidents in 3 patients, stab wound in 2, gunshot wound in 1, and crush injury in 1. All the 7 patients presented hemorrhagic shock at admission, which was timely and effectively corrected. No perioperative death or technical complications occurred. Intimal injury ( n = 2) and partial transaction ( n = 2) of the innominate artery were treated with covered stents. Two patients with complete transection of artery received vascular reconstruction by artificial grafts. One patient with partial transaction received balloon dilation and open surgical repair (hybrid operation). The mean time interval from trauma to blood flow reconstruction was (4.27 ± 0.18) h, range 4.0-4.5 h; while the operation time was (48.57 ± 19.94) min, range 25-75 min. Cerebral infarction occurred in one patient with brain injury due to anticoagulation contraindication. The average follow-up was (13.29 ± 5.65) months, range 6-24 months. No severe stenosis, occlusion, and thrombosis of covered stents or artificial vessels were found by color Doppler ultrasound. Conclusion::Urgent control of hemorrhage and restoration of blood supply are critical for the treatment of traumatic innominate arterial injury. Endovascular therapy is a feasible and effective method with short operation time and less trauma.

Traumatic peripheral vascular injury is a significant cause of disability and death either in civilian environments or on the battlefield. Penetrating trauma and blunt trauma are the most common forms of vascular injuries. Besides, iatrogenic arterial injury (IAI) is another pattern of vascular trauma. The management of peripheral vascular injuries has been improved in different environments and wars. There are different types of vascular injuries, such as vasospasm, contusion, intimal flaps, intimal disruption or hematoma, external compression, laceration, transection and focal wall defects, etc. The main clinical manifestations of vascular injuries are shock following massive hemorrhage and limb necrosis due to tissue and organ ischemia. Ultrasound, computed tomography angiography (CTA) and magnetic resonance angiography (MRA) are most valuable for assessment of peripheral vascular injuries. Angiography remains the gold standard for diagnosing vascular trauma. Immediate hemorrhage control and rapid restoration of blood flow are the primary goals of vascular trauma treatment. There are many operative treatment methods for vascular injuries, such as vascular suture or ligation, vascular wall repair and vascular reconstruction with blood vessel prostheses or vascular grafts. Embolization, balloon dilation and covered stent implantation are the main endovascular techniques. Surgical operation is still the primary treatment for vascular injuries. Endovascular treatment is a promising alternative, proved to be safe and effective, and preferred selection for patients. In summary, rapid diagnosis and timely surgical intervention remain the mainstays of the treatment. However, many issues need to be resolved by further studies.

OBJECTIVETo investigate the effect of the anti-platelet effect of aspirin plus clopidogrel on off-pump coronary artery bypass (OPCAB) grafting and the possible side effects of such therapy.

METHODSSixty patients who underwent standard OPCAB were randomized immediately after surgery in two groups: the aspirin alone group of 30 patients who received aspirin (100 mg) daily; and the combination group of 30 patients who received clopidogrel (75 mg) plus aspirin (100 mg) daily. Platelet aggregation in response to arachidonic acid (PLAA) and adenosine diphosphate (PLADP) were measured at baseline (before surgery) and 1-6, 8, and 10 days after the medication. Postoperative bleeding and other perioperative parameters were compared between these two groups.

RESULTSThere were no significant differences between the two groups in perioperative findings including average number of distal anastomosis, operative time, postoperative bleeding, ventilation time, and intensive care unit stay (all P>0.05). The proportion of patients with the PLAA above 20% value was significantly lower in the combination group than those in the aspirin alone group (32.1% vs 62.1%, P<0.05). PLAA of two groups one and two days after taking aspirin or plus clopidogrel were (24.2±31.9)% vs. (49.6±32.6)% and (13.8±27.2)% vs. (37.6±37.4)%, respectively (P<0.05). No obvious postoperative complication was noted in both groups. Multivariate analysis showed that clopidogrel administration was independently correlated with aspirin resistance (P=0.044, OR = 0.09;95% CI=0.07-0.48).

CONCLUSIONEarly combined use of aspirin plus clopidogrel after OPCAB can remarkably reduce OPCAB-related aspirin resistance and enjoy similar safety.

Aged ; Aspirin ; therapeutic use ; Coronary Artery Bypass, Off-Pump ; Coronary Disease ; diet therapy ; surgery ; Drug Therapy, Combination ; Female ; Humans ; Male ; Middle Aged ; Platelet Aggregation Inhibitors ; therapeutic use ; Postoperative Period ; Ticlopidine ; analogs & derivatives ; therapeutic use

Purpose::To explore the significance of traditional vascular reconstruction and covered stent for limb salvage after subclavian artery injury.Methods::Patients with subclavian artery injury admitted to Beijing Jishuitan Hospital from January 2010 to December 2018 were retrospectively analyzed. All the injuries have been confirmed by intraoperative exploration, computed tomography angiography or digital subtraction angiography. Complete or partial amputation injuries were excluded. Mild artery defect or partial intimal damage was treated by inter-ventional implantation, while other patients received open surgeries, including direct suture of small defect less than 2 cm and transplantation with autologous vein or artificial blood when the defect was more than 2 cm. Patients were divided into open surgery group and stent implantation group based on the treatment they received. Patients were followed up at 2 weeks (first stage) and 6 months (second stage) after operation to investigate limb salvage. Student's t-test was used to compare the general data between two groups and Chi-square test to analyze the rate of limb salvage. Results::Altogether 50 cases of subclavian artery injury were treated, including 36 cases of open surgery and 14 cases of stent implantation. Combination of nerve injury was observed in 27 cases (75.0%) in open surgery group and 12 cases (85.7%) in stent implantation group. Amputation developed in 3 cases with open surgery and 1 case with stent implantation. Consequently the rate of successful limb salvage was respectively 91.7% (33/36) and 92.9% (13/14), revealing no significant difference ( p > 0.05). Conclusion::Rapid reconstruction of blood circulation is crucial following subclavian artery injury, no matter what kinds of treatment strategies have been adopted. Interventional stent implantation can achieve a good effect for limb salvage.

BACKGROUNDDiagnosis and treatment for respiratory symptoms (RSs) of gastroesophageal reflux disease (GERD) is more difficult than that for common esophageal symptoms. The goal of this study was to evaluate the efficacy and safety of radiofrequency (RF) treatment on RSs of GERD in a preliminary 12-month follow-up observation.

METHODSFrom April 2006 to October 2008, 505 GERD patients with mainly respiratory presentations such as wheezing, chronic cough or hoarseness, were treated by endoscopic RF. A questionnaire was completed before and after treatment, using a six-point scale ranging from 0 to 5 to assess symptom severity and frequency. The symptom score was the sum of frequency and severity.

RESULTSSymptom scores were significantly improved at the end of the follow-up period. The mean heartburn score decreased from 5.31 to 1.79. The mean regurgitation score decreased from 5.02 to 1.64; mean cough score decreased from 6.77 to 2.85; mean wheezing score decreased from 7.83 to 3.07; and mean hoarseness score decreased from 5.13 to 1.81 (P < 0.01). No major complications or deaths occurred. Minor complications included temporary post-procedural retrosternal unease or pain (n = 106; 21.0%), mild fever (n = 86; 17.0%), transient nausea/vomiting (n = 97; 19.2%), and transient dysphagia (n = 42; 9.3%). Thirty-five (6.9%) patients had recurrence of symptoms. Endoscopic RF treatment was repeated in six patients, and laparoscopic fundoplication was performed in seven.

CONCLUSIONEndoscopic RF is an effective and safe means to treat RSs in patients with GERD.

Adult ; Aged ; Cough ; surgery ; Esophagogastric Junction ; physiopathology ; radiation effects ; Esophagoscopy ; methods ; Female ; Gastroesophageal Reflux ; physiopathology ; surgery ; Heartburn ; surgery ; Hoarseness ; surgery ; Humans ; Male ; Middle Aged ; Radio Waves ; Treatment Outcome ; Young Adult

OBJECTIVETo analyze human leukocyte antigen (HLA) polymorphism and search for new alleles in Chinese Han population bone marrow registry donors.

METHODSDNA-based HLA genotyping methods were used including PCR-SSP, BST and molecular cloning.

RESULTSA total of 6965 unrelated donors, 4707 from South China origin and 2258 from north, were typed for HLA-A, B, and DRB1 loci. Seventy-two specificities of HLA alleles were identified. The HLA-A25, A34, A74, B41, B42, B53, B73 and B81 that were rarely reported in previously Chinese population studies were identified in this study. Estimation of gene frequency indicated that the blank gene frequency was less than 0.2% for HLA-A, 0.25% for HLA-B and 0.70% for HLA-DRB1 loci. Three novel alleles were identified and officially assigned by the World Health Organization (WHO) Nomenclature Committee as A*0253N, A*1114 and B*5610.

CONCLUSIONLarge-scale DNA-based HLA genotyping used in bone marrow registry donors is highly accurate and reliable for estimating gene frequency and searching for new alleles. The discrepancy of HLA gene distribution between South and North China Han population showed the necessity of setting the more regions in South and North China to screen the bone marrow registry donors for bone marrow transplant.

Bone Marrow Transplantation ; statistics & numerical data ; China ; ethnology ; Female ; Gene Frequency ; HLA-A Antigens ; genetics ; HLA-B Antigens ; genetics ; HLA-DR Antigens ; genetics ; HLA-DRB1 Chains ; Histocompatibility Antigens Class I ; genetics ; Histocompatibility Antigens Class II ; genetics ; Humans ; Male ; Polymorphism, Genetic ; Registries ; Tissue Donors