Objective To explore the effects of the clonidine-displacing substance(CDS)on the function of isolated islets from normal rats. Methods The SD rat islets were isolated by digestive method with collagenase and DNase, and incubated in RPMI 1640 culture medium overnight. Multiscreen Assay System was used to observe the effects of CDS on the function of the isolated islets. Insulin and glucagon were measured by RIA. Results Glucagon secretion of the isolated islets in incubation medium was inhibited by glucose. CDS could significantly inhibit glucagon secretion in concentration-dependent manner. Insulin secretion of the isolated islets was dependent on the glucose concentration of incubation medium. CDS could stimulate insulin secretion significantly. Nifedipine (Ca 2+ channel blocker) and diazoxide (K + channel opener) could inhibit the insulin release of the isolated islets, the effect of which could be abolished by CDS. Conclusion As an endogenous ligand of imidazoline receptors, CDS could stimulate insulin secretion, and inhibit glucagon release in the isolated islets.

Objective To investigate p53 protein expression in nasopharyngeal carcinoma (NPC) and its correlation with biological behavior, p53 gene mutation and EBV infection in 43 cases of NPC. Methods Immunohistochemical staining was applied to detect p53 protein,PCR-SSCP was used to detect p53 gene mutation, and EBV infection was determined with PCR. Results The positive rate of p53 protein expression was 76 7%(33/43)in the NPC. The positive rate of p53 protein expression in stages Ⅲ and Ⅳ was significantly higher (80 6%) than that in stages Ⅰ and Ⅱ(66 6%) (P

Objective:To construct an adenovirus-mediated mouse endostatin vector (Ad-mEndo) and to observe its inhibitory effect on the pulmonary metastasis of osteosarcoma in nude mice, so as to discuss the relationship between ES expression and the pulmonary metastasis of osteosarcoma. Methods: Recombinant adenovirus plasmid pDC315-mEndo was constructed and used to prepare recombinant Ad-mEndo. Osteosarcoma MG-63 cells were subcutaneously injected into the right fore limbs to establish nude mouse model of osteosarcoma; and the models were randomly divided into 3 groups: Ad-mEndo group, Ad-EGFP group and PBS group; animals receiving no transplantation served as blank control. The corresponding agents were injected (20 ?l per time) for a consecutive of 5 times on a weekly basis. The tumor volumes, histopathological characteristics were observed; ELISA was employed to examine the serum ES level. Animals were sacrificed 7 weeks later and the pulmonary metastasis was observed. Results: Sixteen days later,the tumor volume was (1.53?0.05)cm3 in Ad-EGFP group, (1.56?0.07)cm3 in the PBS group, and (0.91?0.03)cm3 in the Ad-mEndo group, with the tumor inhibitory rate being 40.7% in the last group. The serum ES level in the Ad-mEndo group was significantly higher than that of the other groups (P

OBJECTIVE: To evaluate the effectiveness of recombinant adenovirus p53 injection (rAd2p53) combined with cisplatin plus 5-fluorouracil regimen in treating laryngeal carcinoma. METHOD: Tumour animal models were established in the back of mice with Hep-2 cell line. Recombinant adenovirus p53 injection (rAd2p53) were transduced to tumor-bearing mouse by direct intratumoral injection combine with cisplatin plus 5-fluorouracil ivgtt. The control group 1 was given recombinant adenovirus p53 injection (rAd2p53) simplex. The control group 2 was administered with cisplatin plus 5-fluorouracil ivgtt simplex. Then compare the diameters of pro-treatment with that of post-treatment and test group with controls. RESULT: Tumor growth was significantly inhibited following combined rAd2p53 gene therapy with cisplatin plus 5-fluorouracil chemotherapy compared to single rAd2p53 gene therapy and cisplatin plus 5-fluorouracil chemotherapy controls. CONCLUSION Local injection of rAd2p53 combined with cisplatin plus 5-fluorouracil chemotherapy is a promising treatment to laryngeal cancer.
Adenoviridae ; genetics ; Animals ; Drug Evaluation, Preclinical ; Female ; Genes, p53 ; Genetic Therapy ; Genetic Vectors ; Laryngeal Neoplasms ; therapy ; Mice ; Mice, Inbred C3H ; Neoplasms, Experimental

Objective To investigate the effect of phosphoinositide-3-kinase inhibitor LY294002 on the differentiation of human embryonic stem cells (HESC) into more mature insulin-producing cells. Methods HESCs were induced to differentiate into insulin-producing cells through five stages. Nicotinamide and B27 (group B27), nicotinamide and LY294002 (group LY) were used to induce the nesting positive cells into mature insulin-producing cells. The morphological change of each stage was observed under microscope , and expressions of insulin, c-peptide, somatostatin and glucagon were identified by immunofluorescence staining. Results After 14 days in stage 5 , there was no significant difference in rate of insulin positive cells between group LY and group B27 (P﹥0.05), but rates of somatostatin and glucagon positive cells in group LY were lower than those in group B27(P﹤0.05). Furthermore, the co-stained rate of somatostatin and insulin in group LY was also lower than that in group B27 (P﹤0.05). Conclusion HESCs can be induced to differentiate into more mature insulin-producing cells by phosphoinositide-3-kinase inhibitor LY294002 in serum-free culture medium.

Objective:To explore the clinical phenotype and genetic characteristics of a child with Hypotrichosis 14.Methods:A child who had presented at the Henan Provincial People′s Hospital on May 4, 2020 due to hair thinning was selected as the study subject. Clinical data of the child was collected. Peripheral venous blood samples were collected from the child and her parents. Genomic DNA was extracted and subjected to whole exome sequencing. Candidate variants were validated by Sanger sequencing and bioinformatic analysis.Results:The child, a 5-year-old female, had presented with thin, soft lanugo-like hair which was easy to fall off. The child was found to harbor compound heterozygous missense variants of the LSS gene, namely c. 1609G>A (p.V537M) in exon 17 and c. 802T>G (p.F268V) in exon 8, which were respectively inherited from her father and mother. Both variant sites were highly conserved, though based on the guidelines from the American College of Medical Genetics and Genomics (ACMG), both variants were rated as variants of unknown significance (PM2_Supporting+ PP3+ PP4). Conclusion:The c. 1609G>A (p.V537M) and c. 802T>G (p.F268V) compound heterozygous variants of the LSS gene probably underlay the clinical phenotype in this patient.

OBJECTIVETo assess the association of polymorphisms of oncostatin M receptor (OSMR) gene with dilated cardiomyopathy (DCM) in a Han Chinese population.

METHODSFor 351 DCM patients and 418 healthy controls, two single nucleotide polymorphisms (SNPs) of the OSMR gene, namely rs2292016 (promoter, -100G/T) and rs2278329 (missense, Asp553Asn), were genotyped with a TaqMan SNP genotyping assay. Two hundred of the patients were also followed up for (49.85 ± 22.52) months.

RESULTSFor rs2292016, carriers of GT genotype were more likely to develop DCM compared to those with GG and TT genotypes (OR=1.45, 95%CI: 1.09-1.92, P=0.01). For those who did not receive cardiac resynchronization therapy, the GG genotype of rs2292016 was an independent indicator for poor prognosis (OR=1.69, 95%CI: 1.11-2.63, P=0.017). No association was found between genotypes of rs2278329 with the susceptibility or prognosis of DCM.

CONCLUSIONPolymorphisms of the OSMR rs2292016 locus are related to the development and outcome of DCM.

Asian Continental Ancestry Group ; genetics ; Cardiomyopathy, Dilated ; etiology ; genetics ; China ; ethnology ; Genotype ; Humans ; Oncostatin M Receptor beta Subunit ; genetics ; Polymorphism, Single Nucleotide

Objective:To investigate the clinicpathological, immunohistochemical and molecular genetic features of malignant mixed mesodermal tumor (MMMT) in the female reproductive system.Methods:To analyze its histopathological characteristics, we performed a retrospective review of the MMMT cases diagnosed at PLA General Hospital, Beijing, China during 2005-2019 using its surgical and pathological databases. EnVision immunohistochemical staining was used to detect the expression of ER, PR, p16, p53 and MMR proteins.Results:Fifty cases were conformed to the diagnosis, including 29 cases originated in the uterus, 16 cases in ovary, 4 cases of synchronous occurrence in uterus and ovary, 1 case in cervix. The tumor was histologically composed of two components, namely carcinoma and sarcoma ones, with clear borderline or blend mutually. The proportion of cancer component in the whole tumor ranged from 5%-90%. The proportion of carcinoma was more than 50% in 76% of the cases, and less than 50% in 24% of cases, including 2 cases with<10% of carcinoma. In the cases of primary uterine MMMT, the main carcinoma type was high grade endometrioid carcinoma (55%, 16/29). In ovarian MMMT, the main carcinoma type was serous carcinoma (12/16), while that of cervical MMMT was squamous cell carcinoma. The others were clear cell carcinoma or the undifferentiated carcinoma. There was one carcinoma type in most cases, only 7 cases had two carcinoma types. Homologous sarcomas, including stromal sarcoma, leiomyosarcoma and high-grade spindle cell sarcomas, were more commonly found in uterine MMMT (72.4%, 21/29). While heterogenic sarcomas, including chondrosarcoma, osteosarcoma and rhabdomyosarcoma, were more commonly noted in ovarian MMMT (12/16) than MMMT of other sites. There were 10 cases that consisted of two types of sarcomas. The synchronous MMMT of uterus and ovary had similar morphology and the types of carcinoma and sarcoma. The tumor cells that spread or metastasized to lymph node, omentum, intestinal wall or skin were all carcinoma cells, and were morphologically consistent with the original tumors. Immunohistochemically, ER and PR were both negative (23/25 in uterine, 8/10 in ovarian tumors). p16 was strongly positive (11/11 in uterine tumors, and 6/6 in ovarian tumors), with similar expression patterns in the carcinoma and sarcoma components. p53 showed mutant-type staining (64%, 21/33) and expressed synchronously in carcinoma and sarcoma components. p53 mutation was found in 35% cases of endometrial carcinoma and 46.7% cases of non-endometrial carcinoma. p53 mutation was also found in only 31.8% cases of heterogenic sarcomas, but in 50% of non-heterogenic sarcomas. Twenty-eight cases (28/33, 85%) presented intact mismatch repair proteins, while 5 cases (5/33, 15%) presented deficient mismatch repair proteins.Conclusions:MMMT in female reproductive system is a rare high-grade biphasic tumor with complex and diverse morphology. The immunohistochemical features are characterized by negative ER/PR and strongly positive p16, mostly mutant p53 and proficient mismatch repair proteins. The patients with a high FIGO stage have worse prognosis.

The self-care level of patients with chronic diseases changes over time, and trajectories can describe this dynamic process. This paper reviews the concept, origin, development and self-care trajectory of chronic disease patients in order to understand the current self-care trajectory, influencing factors and self-care intervention programs of chronic disease patients, and to look forward to the development of chronic disease self-care in China. It lays the foundation for the formulation of self-care intervention programs for patients with chronic diseases in China, so as to comprehensively and permanently improve the self-care level of patients with chronic diseases.

Objective: To explore age-related clinical characteristics, early responses and outcomes in non-senile adults with de novo acute myeloid leukemia (AML). Methods: Data of consecutive cases of 18-65 years adults with de novo AML (non-acute promyelocytic leukemia) were reviewed retrospectively. Clinical characteristics at diagnosis, early responses and outcomes across different age groups of patients were analyzed. Results: 1 097 patients were enrolled. 591 (53.9%) were male. Median age was 42 years. Increasing age was significantly associated with decreasing WBC count (P=0.003), increasing PLT count (P=0.034), lower blast proportions in bone marrow (P=0.021). The incidence of NPM1⁺/FLT3-ITD^- increased with age (P<0.001). Multivariate analyses showed that increasing age was associated with low probabilities of achieving morphologic leukemia free state (MLFS) (P=0.053) and complete remission (CR) (P=0.004) and poor overall survival (OS) (P=0.070) in the whole patients population. However, increasing age was not associated with low MLFS rate and poor OS, except low CR rate (P=0.075) in those receiving standard induction regimen instead of low-intensity regimen. Conclusions There were significant differences on clinical characteristics, cytogenetics and molecular genetics across different age groups in non-senile adults with de novo AML. In the patients receiving standard induction regimen, age was not associated with MLFS rate and OS.