Objective To investigate the polymorphism of human cytomegalovius UL143 gene of low passage clinical isolates in Guangzhou,China.Method PCR was performed to amplify the entire HCMV ULl43 gene region of 3 clinical isolates,which had been proven by multiplex PCR.The amplification products were cloned into pMD18-T-Vector and subjected to sequencing.The result of DNA sequences were analyzed together with the one of published homologous sequences in GenBank from 14 clinical isolates.Result There were several stop codons in UL143 gene due to a base deletion in open reading frame (ORF) of D3 isolate,which could lead to produce non-functional protein.UL143 ORF of Toledo isolate consisted of 279 nueleotides,encoding a protein with 92 amino acids.UL143 ORFs of other isolates consisted of 252 nueleotides,encoding a protein with 83 amino acids.The DNA sequences were quite conserved and all the variations were base substitution.The amino acid sequences of different isolates were highly conserved.with variation of 1.2%-2.4%.There were no additional or deleted sites of post translational modification of UL143 protein in all clinical isolates except Toledo isolate.There were some differences in the secondary structure among different isolates.The isoelectric point of UL143 protein of all clinical isolates except Toledo isolate was 8.75.Conclusion All DNA and deduced amino acid sequences of UL143 gene shared great similarity among HCMV clinical strains regardless of their polymorphism.

Objective To study the association of single nucleotide polymorphism (SNP) of the protein tyrosine phosphatase-1B (PTP-1B) gene with type 2 diabetes mellitus and obesity in Chinese. Methods SNPs in the PTP-1B gene were detected by direct sequencing to PCR products, and the detected SNPs were genotyped in case-spouse samples with the technique of fluorescence real-time PCR. Results Totally 6 SNPs were found in PTP-1B gene. Three SNPs (I5/37 C→A,I6/82 A→G, I7/301 C→T) were in the intron regions and the other 3 (E8/45 C→T, E9/35 G→A, E10/372 G→A)in the exon regions. Among them, E9/35 G→A was a newly found mutation site. The A allele frequency of I5/37 C→A, T allele frequency of I7/301 C→T and G allele frequency of I6/82 A→G in type 2 diabetes were significantly higher than those in the normal spouse group (P

Objective:To explore the eye movement characteristics of social cognitive processing in schizophrenia patients across different stages and its association with clinical symptoms.Methods:Fifteen patients with first-episode schizophrenia, forty-six patients with chronic inpatient schizophrenia, thirty-six patients with psychiatric clinical high-risk syndrome, and twenty-six healthy controls were recorded using eye tracking technology when viewing social interaction pictures. Covariance analysis and partial correlation analysis were conducted by SPSS17.0.Results:When watching the pictures of person communication, there were statistically significant differences in the average fixation duration of the four groups of subjects ((294.6±36.7)ms in control group, (280.0±54.0)ms in clinical high-risk group, (268.5±34.9)ms in first-episode group, and (315.7±75.7) ms in chronic group, respectively, F=3.18, P=0.027). When viewing the pictures of no person landscape, the average saccade amplitude of the four groups of subjects was significantly different (5.3±1.1) ° in control group, (4.7±1.1) ° in clinical high-risk group, (5.2±1.0) ° in first-episode group, and (4.4±1.2) ° in chronic group, respectively, F=3.37, P=0.021). The average fixation duration of chronic patients when observing person communication pictures was positively correlated with the total score of PANSS (partial correlation coefficient=0.313, P=0.039). The average fixation duration of chronic patients when observing the other two types of pictures were also positively correlated with the total score of PANSS (partial correlation coefficient=0.320, P=0.034, no person communication pictures; partial correlation coefficient=0.372, P=0.013, no person landscape pictures) . The average fixation duration of chronic patients when observing pictures of no person landscape was positively correlated with the PANSS positive symptom score (partial correlation coefficient=0.321, P=0.034). The average fixation duration of chronic patients when observing any type of picture was positively correlated with the PANSS general symptom score (person communication pictures: partial correlation coefficient=0.385, P=0.010; no person communication pictures: partial correlation coefficient=0.409, P=0.006; no person landscape pictures: partial correlation coefficient=0.465, P=0.001). In the first-episode patient, the average saccade amplitude when observing no person communication pictures was positively correlated with the PANSS positive symptom score (partial correlation coefficient=0.555, P=0.049). In the clinical high-risk group, the average saccade amplitude when observing person communication pictures was negatively correlated with the SOPS positive symptom score (partial correlation coefficient=-0.373, P=0.030). Conclusion:There are statistically significant differences of eye movement characteristics of social cognitive processing in patients with schizophrenia across different clinical stages.The average saccade amplitude is more sensitive than the average fixation duration in predicting the severity of symptoms in clinical high-risk patients.

Objective:To discuss the value of ultrasound in the diagnosis of pelvic lipomatosis and analyze the causes of misdiagnosis.Methods:A retrospective analysis of 68 cases of pelvic lipomatosis confirmed by operation or imaging in Peking Union Medical College Hospital from January 2000 to December 2018 was made to summarize the characteristics of ultrasonic manifestations.Results:Ultrasonographic findings were as follows: 6 cases (8.8%) had increased fat-like hyperecho in pelvic cavity; 60 cases (88.2%) had abnormal bladder; 42 cases (61.7%) had pyelectasis and 24 cases (35.3%) had ureterectasis. Of the 68 cases, 6 cases (8.8%) were correctly diagnosed; 54 cases (79.4%) were missed; 8 cases (11.8%) were misdiagnosed, including 7 cases (10.3%) of bladder tumor and 1 case (1.5%) of retroperitoneal giant mass.Conclusions:Pelvic lipomatosis has characteristic sonographic features.When urinary tract obstruction and bladder wall thickening are observed, pelvic lipomatosis should be considered. Bladder shape and existence of increasing fat-like hyperecho in the pelvis should be further scanned to reduce the misdiagnosis rate of pelvic lipomatosis.

OBJECTIVETo evaluate the colorectal cancer (CRC) prevention effect of metformin in comparison with that of other T2DM medications from a Markov model perspective.

METHODSLiterature concerning CRC morbidity of T2DM patients with metformin or other diabetes medications treatment was reviewed in PubMed and Cochrane Library database from September 2010 to December 2016.

INCLUSION CRITERIA(1)enrolled population was adult patients with T2DM but without CRC; (2) any of the parameters applied in our model was reported; (3) randomized clinical trials (RCTs), quasi-randomized trials, prospective or retrospective cohort studies. With CRC morbidity as endpoint, parameters were extracted to construct Markov model to assess CRC morbidity and cumulative tumor-free survival in each group over 11 years' follow-up period. Finally, Monte Carlo analysis was performed to evaluate the influence of parameter instability on the model.

RESULTSSeven literatures were recruited and 10 000 patients were virtually allocated for each arm. In contrast with non-metformin group, T2DM patients treated with metformin had a lower rate of CRC(1.670% vs. 2.146%, P=0.016). Moreover, cumulative tumor-free survival of metformin group was, slightly but significantly, better than that of non-metformin group (10.908 years vs. 10.882 years, P=0.000).

CONCLUSIONST2DM patients treated with metformin have a lower morbidity of CRC and a better cumulative tumor-free survival than those of non-metformin group. Large scale RCTs are needed to illustrate the role of metformin in the prevention of CRC.