Adenocarcinoma ; metabolism ; pathology ; Chromogranin A ; metabolism ; Colonic Neoplasms ; metabolism ; pathology ; Humans ; Immunohistochemistry ; methods ; Proliferating Cell Nuclear Antigen ; metabolism ; Staining and Labeling ; methods ; Vimentin ; metabolism

17 strains of bacterium that produced a large amount of ?-PGA when it was grown aerobically in a culture medium containing ammonium salt and sugar as sources of nitrogen and carbon respectively,were isolated from bean products.With the following identifications of colony morphology,physiological and biochemistry experiments,and genetics,the strain PGA-O-7 was classified as a Bacillus subtilis.The PGA production 2.8 (mg/mL) was obtained when it was grown in a medium containing 3% ammonium sulfate and 4% glucose at 30℃ for 72h with sharking.

Objective To study the clinicopathologieal features and expression of cyclin D1 and p53 in epithelial ovarian tumors,and to investigate the correlation between pathogenesis of ovarian cancer and epithelial borderline tumors.Methods Fifty four cases of ovarian borderline tumors and 45 cases of ovarian carcinomas from the People's Hospital,Peking University were reviewed retrospectively.The clinical data and pathological findings were analyzed.Immunohistochemical study of cyclin D1 and p53 was performed in all 99 cases.Results(1)In borderline tumors,the age of patients ranged from 14-82 (mean age=42.5)years.International Federation of Gynecology and Obstetrics(FIGO)stage of borderline tumors was stage Ⅰ in 48 cases,stage Ⅱ in 3 cases,and stage Ⅲ in 3 cases.In ovarian carcinomas,the age of patients ranged from 26-80(mean age=53.5)years.FIGO stage of carcinoma was stage Ⅰ in 6 cases, stage Ⅱ in 8 cases,stage Ⅲ in 26 cases,and stage Ⅳ in 5 cases.In follow-up of 54 cases with borderline tumors the 5-year survival rate was 98% and of 45 cases with carcinomas a 5-year survival rate of 51% was noted.(2)In 54 cases of borderline tumors,mucinous types accounted for 56%(30/54)and serous types accounted for 30%(16/54).There were 5 cases with micropapillary pattern,3 cases with peritoneal implants,3 cases with lymph node involvement,6 cases with microinvasion,one case with intraepithelial carcinoma,and one case with mural nodules.In 45 cases of carcinomas,serous carcinoma was the most (49%,22/45).The remainder included 3 cases of mucinous types,8 cases of endometrioid types,6 cases of transitional cell types,3 cases of mixed phenotype and 3 cases of undifferentiated types.(3) Overexpression of cyclin D1 and p53 was observed in 31%(14/45)and 56%(25/45)of ovarian carcinomas, respectively.There was a significant association between p53 overexpression and tumor grade.In the borderline tumor group,69%(37/54)had overexpression of cyelin D1 and 6%(3/54)had overexpression of p53.There were significant differences in expression of cyclin D1 and p53 between conventional serous borderline tumors and high-grade serous carcinomas(cyclin D1:91% vs 26%;p53:0 vs 58%).However, micropapillary serous borderline tumors and low-grade serous carcinomas showed remarkably similar expression of cyelin D1 and p53.Conclusions Epithelial ovarian borderline tumors are distinct from ovarian cancer in clinical progress and prognosis,and histological types.Overexpression of cyclin D1 is common in ovarian borderline tumors and low grade carcinomas.And overexpression of p53 is more common in high grade ovarian carcinomas.Conventional serous borderline tumors are distinct from high-grade serous carcinomas in pathogenesis.Micropapillary serous borderline ovarian tumors may be closely related to low grade serous carcinomas.

OBJECTIVETo analyze the toxicity of high-frequency electromagnetic field (HF-EMF) on the reproductive and endocrine functions of female workers.

METHODS180 female workers exposed to HF-EMF for more than one year were selected as the exposure group, and 349 female workers in the marketplace were selected as the control group. Their menstrual status and pregnancy outcomes were evaluated with historical cohort study. Meanwhile, the serum levels of reproductive hormones including follicle stimulation hormone (FSH), luteinizing hormone (LH), estradiol (E(2)) and progesterone (P(4)) from 30 workers respectively in the exposure group and the control group selected randomly (in periovulatory period) were detected with the radio immunoassays.

RESULTSWith the increase of residue of HF-EMF, the incidence of menstrual disorder was increased (33.8% and 26.8% in the exposure group compared with 12.0% in the control group) (P < 0.01) and the incidence of menorrhagia in the exposure I group (16.9%) was significantly higher than that in the control group (8.0%) (P < 0.01). However, serum P(4) was significantly lower in the exposure group [(2.10 +/- 1.57) and (2.39 +/- 1.35) mg/L] than in the control group [(3.80 +/- 2.67) mg/L] (P < 0.01). There was no significant difference in serum E(2), LH and FSH between the exposure and the control groups.

CONCLUSIONIncrease of the incidence of menstrual disorder as well as that of menorrhagia, and decrease of levels of some reproductive hormones are closely associated with HF-EMF (25 approximately 30 MHz).

Adolescent ; Adult ; Case-Control Studies ; Electromagnetic Fields ; adverse effects ; Endocrine System ; radiation effects ; Female ; Hormones ; blood ; Humans ; Menstruation Disturbances ; epidemiology ; Occupational Exposure ; adverse effects ; Surveys and Questionnaires ; Young Adult

0.05)between the two groups.Conclu- sion The long-term outcomes of e-CHB is not markedly different compared with that of e+CHB.

0.05).However,the shorter the history of the disease,the better the efficacy of the treatment.The younger the patient was,the better the efficacy of the treatment.Conclusions Vulva dystrophy can be treated with focused ultrasound effectively and safely.This approach appears to be a new promising treatment method.

OBJECTIVETo investigate a method for the repair of tissue defect.

METHODSAllogenic acellular dermal matrixes (ADM) were implanted to full-thickness skin defects made on the dorsa of rats. Two weeks later, autologous suspended epidermal cells were transplanted on to the surface of vascularized ADM. Respectively, neoepidermis was macroscopically observed 2, 3, 5 weeks after grafting, and samples were taken to make routine paraffin sections for microscopical examination, and immunohistochemical staining for type IV collagen was also performed.

RESULTSThe vascularized ADM could support proliferation and differentiation of epidermal cells, and also could promote the formation of dermal-epidermal junction. Suspended epidermal cells in an artificial culture system in vivo could develop into mature epidermis. The reconstructed skin not only looked like the normal one in appearance in which hair was removed, but also revealed a better function.

CONCLUSIONSFull-thickness skin defect can be repaired by transplanting autologous epidermal cell suspension on to vascularized ADM.

Animals ; Cell Transplantation ; Dermis ; cytology ; Epidermis ; cytology ; Extracellular Matrix ; Rats ; Rats, Wistar ; Skin ; injuries ; Skin Transplantation ; methods ; Soft Tissue Injuries ; surgery ; Suspensions ; Tissue Engineering ; Transplantation, Heterologous ; Wound Healing

Objective To analyze the characteristics of head injuries in children in Wenchuan earthquake. Methods The clinical data of 36 children (21 boys and 15 girls, aged 3 monthsto 14 years with a mean age of 8.1 years) with head injuries in the earthquake receiving treatment in West China Hospital were analyzed. The children sustained mild (30 cases), moderate (4 cases) or severe (2 cases) head injuries due to building collapse (30 cases), cuts (3 cases), or falling (3 cases). The injury types, causes of the injury, treatment methods and outcomes of the children were retrospectively analyzed. Results Building collapse was the most common cause of head injuries in the children in earthquake, accounting for 83.3% of the cases involved. All the 36 children survived the injuries, and upon discharge or transfer, 33 of the children had Glasgow outcome scores (GOS) indicating good recovery, and 3 had moderate disabilities. Conclusion Building collapse was the most common cause of head injuries in Wenchuan earthquake. The majority of the children with head injuries had mild injury with favorable outcomes. Attention should be given to appropriate management of skull fractures in these children.

OBJECTIVETo identify the mutation of solute carrier family 34 member 2 (SLC34A2) gene in a Chinese family with pulmonary alveolar microlithiasis (PAM).

METHODSGenomic DNA was extracted from the family members. DNA sequencing was carried out to confirm the mutation detected by polymerase chain reaction-single strand conformation polymorphisms (PCR-SSCP). The fragments with variation were screened in 100 healthy controls by PCR-SSCP.

RESULTSIn both patients of the family, a homozygous mutation of the SLC34A2 gene was identified in exon 8 (c.A910T), resulting in a premature stop codon. In addition, a homozygous single nucleotide polymorphism (SNP) was found in intron 2 in both patients and the daughter of proband.

CONCLUSIONA novel homozygous mutation in SLC34A2 gene, leading to a premature stop codon therefore a truncated protein, was probably responsible for the PAM in this family. The SNP in intron 2 needs further study.

Adult ; Asian Continental Ancestry Group ; genetics ; Base Sequence ; Case-Control Studies ; Exons ; Female ; Humans ; Lung Diseases ; genetics ; Molecular Sequence Data ; Mutation ; Pedigree ; Sodium-Phosphate Cotransporter Proteins, Type IIb ; genetics

OBJECTIVETo compare and assess the effectiveness of leukocyte-filtered platelet and standard platelet concentrates transfusion in preventing platelet transfusion refractoriness (PTR) and human leukocyte antigen (HLA)-alloimmunization.

METHODSRandomized controlled trials (RCTs) or quasi-RCTs comparing leukocyte-filtered platelet with standard platelet concentrates transfusion (up to December 31, 2009) were searched and identified from Medline, EMBASE, The Cochrane Library, and CBM. A meta-analysis was conducted with Cochrane Collaboration's RevMan 5. 0.

RESULTSThe search identified 558 citations in total, in which 7 articles in English were finally included in the meta-analysis. The analysis showed that compared with standard platelet concentrates transfusion, leukocyte-filtered platelet transfusion significantly decreased PTR [ RR = 0. 59, 95% CI (0. 42, 0. 82) , P = 0. 002 ] and HLA-alloimmunization [ RR = 0. 49,95% CI (0. 33, 0. 74) , P =0. 0006]. Subgroup analysis showed that HLA-alloimmunization was significantly reduced by leukocyte-filtered platelet transfusion among the patients with acute myelocytic leukemia [ RR =0.42, 95% CI (0.32, 0.56), P <0. 00001], while no significant difference was detected in patients with acute lymphoblastic leukemia because of the limited sample size [ RR = 0. 50, 95% CI (0. 10, 2.41) , P =0. 39].

CONCLUSIONSThe current evidence shows that leukocyte-filtered platelet transfusion can prevent PTR and HLA-alloimmunization more effectively than standard platelet transfusion. Well-designed large-scale RCTs are still needed to further confirm this finding.

Filtration ; HLA Antigens ; immunology ; Humans ; Leukocytes ; immunology ; Platelet Transfusion ; methods ; Randomized Controlled Trials as Topic