Objective: To investigate the effects of DFMO on the growth characteristics, apoptosis and activity of telomerase of K562 cells. Methods: The growth rate, phase distribution of cell cycle and apoptosis of treated cells with DFMO were detected by cell count, morphological assay, FCM analysis and DNA electrophoresis, respectively. The telomerase activity was examined by telomeric repeat amplification protocol(TRAP). Results: In K562 cells treated with DFMO, the growth rate was markedly retarded. The increase in G1 -phase cells and decrease in s-phase population and induction of apoptosis were observed. The activity of telomerase of treated cells was inhibited. Conclusion: The growth inhibition and apoptosis induction of K562 cells treated by DFMO were associated with suppressed telomerase activity. It is suggested that inactivation of telomerase in cancer cells conld be one of important events in antitumor molecular mechanism of inhibition of polyamine biosynthesis.

Orinthine decarboxylase (ODC) is a rate-limiting enzyme in polyamine biosynthesis. Abnormal elevation of ODC activity and subsequent polyamine accumulation are intimately associated with the genesis, development and metastasis of cancer. ODC antisense RNA expression plasmid, pCMV/ODCas, was constructed, with which the cells of human lung squamous carcinoma were transfected by the calcium phosphate precipitation method. After G418 selection, two G418 resistant colonies were obtained. The growth rate, the ability to form colony in soft agar, the biosyntheses of DNA, RNA and proteins, and ODC activities of the two antisense transfectants were significantly suppressed in comparison with the parental cell line. It was demonstrated that these changes were associated with the stable integration of exogenous antisense ODC gene in the genomic DNA of transfectants by analysis of Southern blot and PCR.

Objective To study the role of psychological factors in the onset of psoriasis,to investigate the role of monoamine substances in the course of psychological factors-associated psoriasis,and to reveal the psychoneurologic pathogenesis of psoriasis.Methods The psychological factors were assessed with life events scale and questionnaire of A character.The serum levels of norepinephrine(NE),dopamine(DA)and5-hydroxyindoleacetic acid(5-HIAA)were detected with high-performance liquid chromatography(HPLC).Results It was shown that there was an overall tendency of weak A character and moderate depression and anxiety in psoriasis patients.The concentrations of NE,DA and5-HIAA were higher in psoriatic patients than those in normal controls(P

Objective To determine the incidence of pregnancy complicated with heart disease and assess the current obstetric management principles of pregnancy complicated with heart disease. Methods 428 cases of pregnancy complicated with heart disease were reviewed.54 cases were sur- gically corrected heart disease.Results:The incidence of pregnancy complicated with heart dis- ease,during January,1973 to December,1982 and January,1983 to December,1992,were 1.2% (254/21 221) and 0.9% (174/18 726)respectively.The ratio of rheumatic heart disease and congenital heart disease were 4:1 and 1:2 in two periods.There were 37 cases of heart failure and 4 cases of ma- ternal deaths occured.No heart failure and maternal death occured in cases with surgically corrected heart disease.In the two periods,the cesarean section rate were 16.9%(43/254),and 33.3% (58/74) ,P

AIM: To explore the protective effect and mechanism of dexmedetomidine on intestinal mucosal barrier injury in septic rats. METHODS: Forty eight SD rats were randomly divided into four groups (n=12): sham operation group (sham group), sepsis group (sepsis group), sepsis + dexmedetomidine group (DEX group), and sepsis + DEX + HIF-1ɑ inhibitor Bay87-2243 (Bay87-2243 group). Sepsis model was established by cecal ligation and perforation (CLP). The rats in both DEX and Bay87-2243 groups were given 30 μg/kg of DEX intraperitoneally 30 minutes before CLP and 2 hours after CLP; while the rats in Bay87-2243 group received oral gavage of Bay87-2243 (9 mg/kg) for 3 days before CLP. The other groups were intraperitoneally injected and orally with the same amount of normal saline. The HIF-1ɑ and the tight junction protein (tight junction protein, TJs) was detected by western blot; the plasma concentrations of diamine oxidase (DAO), intestinal fatty acid binding protein (FABP2) and D-lactic acid (D-LAC) were detected by ELISA; the morphological changes of intestinal mucosa were detected by HE staining. RESULTS: DEX significantly increased the expression level of HIF-1ɑ (P<0.05) on intestinal mucosa in rats with sepsis injury (P<0.05), thus ameliorated intestinal mucosal pathological injury, reduced Chiu's score (P<0.05), decreased intestinal mucosal permeability (P<0.05), and up-regulated TJs protein expression (P<0.05). Moreover, effect on sepsis induced intestinal mucosal injury of DEX was reversed by HIF-1ɑ Bay87-2243. CONCLUSION: DEX could protect against sepsis-induced intestinal mucosal injury by up-regulating HIF-1ɑ expression in rats.

OBJECTIVETo identify the mutation of the autoimmune regulator gene (AIRE) in a Chinese family with autoimmune polyendocrinopathy syndrome type I (APS-I).

METHODSThe AIRE gene mutations were detected using PCR and direct DNA sequencing. Restriction enzyme analysis was used to confirm the mutations and bioinformatic methods were used to predict the possible impact of the mutations on the structure and function of the AIRE protein.

RESULTSA compound heterozygous mutation of A19T/R257X was detected in the proband. Her father had the A19T mutation in exon 1, but this mutation was not detected in 100 unrelated healthy individuals. Her mother had the R257X mutation in exon 6.

CONCLUSIONThis is the first report about AIRE mutations in Chinese APS-I kindred. The A19T mutation identified in this study has not been reported in the human gene mutation database (HGMD); the R257X has not been reported in Asians.

Adolescent ; Adult ; Amino Acid Sequence ; Asian Continental Ancestry Group ; genetics ; Base Sequence ; Exons ; Female ; Humans ; Male ; Molecular Sequence Data ; Mutation ; Pedigree ; Polyendocrinopathies, Autoimmune ; genetics ; Sequence Alignment ; Transcription Factors ; chemistry ; genetics

Objective To explore the feasibility of 3D printed individualized applicator for the intracavitary HDR-brachytherapy for nasopharyngeal carcinoma.Methods CT scan was performed in 1 case of recurrent rT1 nasopharyngeal carcinoma and 1 case of T2 residual nasopharyngeal carcinoma and the obtained images were transmitted to 3D image processing software.The geometric contour parameters of the nasopharyngeal cavity were obtained and a pipeline was designed to make it close to the recurrent gross tumor volume (rGTV).Individualized cavity applicators were created by using 3D printer.The applicator was inserted into the patient's nasopharyngeal cavity through oral cavity.The source tube and false source were inserted into the preset pipe of the applicator.CT scan was performed again and the images were transmitted to the 3D brachytherapy planning system.Mter delineating the target volume and organ at risk,treatment plan was optimized.After completing the first treatment,the applicator was removed.Before second treatment in a few days,CT scan was reviewed to confirm whether the position was correct.Results When the applicator was inserted into the nasopharyngeal cavity,it could be fully aligned with the nasopharyngeal wall and self-fixed without additional fixation measures.Comparing the location of false source in multiple reviews of CT scan,the error was ≤ 1 mm.No significant discomfort was reported throughout the treatment.In optimized three-dimensional treatment,100％ prescription dose curve included the full rGTV,maximum dose of the brain stem and spinal cord was＜30％ prescription dose.Recurrent patients were given with a prescription dose of DT 40Gy/8 fractions/4 weeks and patients with residual tumors were given with 12Gy/2 fractions/1 week.No tumor recurrence was observed at postoperative 3 months in two cases.Conclusions The 3D printed individualized nasopharyngeal intracavitary applicator has the advantages of self-fixation,accurate location,good repeatability and good patient tolerance.The short-term outcome is effective,whereas its long-term clinical effect and adverse reactions need to be further observed.

Objective:To explore the innovative measures of scientific and technological achievements transformation in hospital by taking the practical experience of scientific and technological achievements transformation of West China Hospital of Sichuan University (WCH).Methods:The data of patents and technological achievements transformation of WCH was analyzed.Results:WCH applied for 1 800 patents and granted 1 145 during January 2015 and December 2019. By 2019, the conversion rate of scientific and technological achievements of WCH reached 14%.Conclusions:WCH has achieved remarkable results in promoting the scientific and technological achievements transformation through a series of innovative explorations and practices, including building professional technology transfer organizations and teams, establishing achievement transformation incentive policies, developing technology transformation standard process and regulations, creating a positive atmosphere of achievement transformation , as well as actively cultivating high-value patents.

Objective: To study the effect of p-phenylenediamine (PPD) on liver and kidney function in occupational exposed workers. Methods: Workers in a hair dye production enterprise which used p-phenylenediamine as a raw material for production were selected as the main research population. Then we conducted a questionnaire survey on the basic conditions of workers and conducted occupational health checkups on general health status, liver and kidney function. Occupational health examination assessment results were tested in Taizhou Cancer Hospital. All data was built using EpiData 3.1 software, and statistical analysis was performed using software SPSS 20.0. Results: The liver function indicators including direct bilirubin, prealbumin, total protein, and white protein, globulin, aspartate aminotransferase, glutamyl transpeptidase, and total bilirubin in the workers exposed to high concentration of PPD were at high normal values, and these indicators were significantly different from low PPD concentration group (P<0.05) . The serum creatinine and serum uric acid in the renal function index were significantly higher in workers exposed to PPD than in workers exposed to low concentrations and in the control group (P<0.05) . Conclusion Occupational exposed to PPD may have a hazard to the workers’ liver and kidney function. Long-term occupational exposure to PPD may lead to increased cumulative exposure of workers, which may cause potential chronic liver and kidney damage in occupationally exposed populations.

Objective: Comparing the benefit of Abidor, lopinavir/ritonavir and recombinant interferon α-2b triple combination antiviral therapy and lopinavir/ritonavir and interferon dual combination antiviral therapy to hospitalized novel coronavirus pneumonia 2019 in Zhejiang province. Methods: A multi-center prospective study was carried out to compare the effect of triple combination antiviral therapy with dual combination antiviral therapy in 15 medical institutions of Zhejiang Province. All patients were treated with recombinant interferon α-2b (5 million U, 2 times/d) aerosol inhalation. 196 patients were treated with abidol (200 mg, 3 times/d) + lopinavir / ritonavir (2 tablets, 1 time/12 h) as the triple combination antiviral treatment group. 41 patients were treated with lopinavir / ritonavir (2 tablets, 1 time/12 h) as the dual combination antiviral treatment group. The patients who received triple combination antiviral therapy were divided into three groups: within 48 hours, 3-5 days and > 5 days after the symptom onset. To explore the therapeutic effects of triple combination antiviral drugs and dual combination antiviral drugs, as well as triple combination antiviral drugs with different antiviral initiate time. SPSS17.0 software was used to analyze the data. Results: The time of virus nucleic acid turning negative was (12.2 ± 4.7) days in the triple combination antiviral drug group, which was shorter than that in the dual combination antiviral drug group [(15.0 ± 5.0) days] (t = 6.159, P < 0.01 ). The length of hospital stay [12 (9, 17) d] in the triple combination antiviral drug group was also shorter than that in the dual combination antiviral drug group [15 (10, 18) d] (H = 2.073, P < 0.05). Comparing the antiviral treatment which was started within 48 hours, 3-5 days and > 5 days after the symptom onset of triple combination antiviral drug group, the time from the symptom onset to the negative of viral shedding was 13 (10,16.8), 17 (13,22) and 21 (18-24) days respectively (Z = 32.983, P < 0.01), and the time from antiviral therapy to the negative of viral shedding was (11.8±3.9) , (13.5±5.1) and (11.2±4.3) d. The differences among the three groups were statistically significant (Z=32.983 and 6.722, P<0.01 or<0.05). Conclusions The triple combination antiviral therapy of Abidor, Lopinavir/Litonavir and recombinant interferon α-2b showed shorter viral shedding time and hospitalization time compared with the dual combination antiviral therapy. The earlier the time to initiate triple antiviral treatment, the shorter the time of virus shedding.