With the continuous development of modern laboratory medicine, the intersection of laboratory medicine and multi-disciplines such as chemistry, physics, and biology has become an inevitable trend, and received extremely extensive attention. As a new nanomaterial with great application prospect in the field of chemistry, quantum dots have brought a new idea for medical laboratory research. This paper summarizes the research status and progress of quantum dots in the diagnosis of infectious diseases, tumors and other diseases. The advantages and disadvantages of existing detection techniques based on quantum dots are discussed in order to provide theoretical thinking for the application of this nanomaterials in laboratory medicine in the future.
Objective To investigate the association between MDM2 gene promoter SNP 309 polymorphism and leukemia susceptibility. Methods Such databases as Ovid, EBSCO, PubMed, CNKI, CBM, VIP and WanFang Data were searched to collect the case-control studies published from January 1990 to June 2012. According to the inclusion and exclusion criteria, the studies were screened, the data were extracted, and the methodological quality of the included studies was evaluated. Then meta-analysis was conducted using RevMan 5.0 and Stata 10.0 software, the pooled odds ratio (ORs) with 95% confidence interval (CI) were calculated, and the sensitivity and publication bias were evaluated at the same time. Results A total of 9 studies within 8 articles were included, which involved 1 821 cases and 5 642 controls. The results of meta-analysis showed that, the susceptibility of leukemia was increased in the G allele carriers compared with the T allele carriers (OR=1.26, 95%CI 1.08 to 1.46, P=0.003), and the leukemia risk was higher in the GG genotype populations compared with the TT genotype populations (OR=1.46, 95%CI 1.02 to 2.10, P=0.04). Among Asians with recessive models, the leukemia risk was higher in the homozygous GG genotype compared with both the heterozygous GT genotype and the homozygous TT genotype (OR=2.00, 95%CI 1.37 to 2.92, P=0.000 3). There was no obvious publication bias. Conclusion MDM2 gene promoter SNP 309 polymorphism is associated with the susceptibility of leukemia, and the G allele is likely to be the risk factor for leukemia.
Objective To investigate HCV genotypes in HCV patients in West China Hospital of Sichuan University, and to analyze the major genotypes and clinical characteristics. Methods From March 2011 to September 2016, 4 520 HCV patients who were successfully genotyped HCV genotypes were enrolled in West China Hospital of Sichuan University. The genotypes distributions and the characteristics of laboratory characteristics of liver function, the viral loading were all analyzed. In addition, the genotypes in HCC patients, liver cirrhosis, HBC/HCV co-infection were also analyzed. Results HCV genotypes of HCV patients were divided into five genotypes of 1, 2, 3, 4, 6 and 23 subtypes, including predominant genotypes/subtypes 1b, 1*, 3b, 2a, 3a and 6a, accounting for 66.42%, 8.01%, 6.57%, 4.54%, 4.29%, and 3.41%, respectively. Subtype 1b was the predominant subtype for both sex. In male patients, the levels of ALT were highest in 6a subtype, while in female, the levels of ALT were highest in 3a subtype. For the 94 liver cirrhosis patients, 42 patients were 1b subtypes; as for the 6 HCC patients, 1b and 3b subtypes were the only detected. Conclusion HCV genotypes/subtypes of HCV patients in West China Hospital of Sichuan University have unique characteristics of distribution, while the predominant genotype/subtypes are 1b,1*, 3b, 2a, 3a, 6a.
Objective To investigate HPV infection, genotype distribution of HPV infection among 8 944 females of health examination in West China Hospital of Sichuan University. Methods We enrolled 8 944 females of health examination in West China Hospital of Sichuan University from January to September in 2016. HPV genotyping was performed by Luminex fluorescence technique. Excel 2007 and SPSS 17.0 softwares were used to analyze the infection and genotype distribution of HPV. Results The HPV infection rate of 8 944 health examination women was 14.4% (1 291/8 944). Among them, there were 1 025 cases of single infection, the infection rate was 11.5% (1 025/8 944); there were 266 cases of multiple infection, the infection rate was 3.0% (266/8 944). The infection rates of 20 to 25 years and ≥66 years groups in single and multiple infection were higher than other age groups. In the single and multiple infections, the most common genotypes were HPV52, 53, 16 and 58. Infection rate of HPV52 was the highest in single infection, which had two increased age groups including 31 to 35 years and 61 to 65 years old. Infection rate of HPV52 and HPV16 were increased in 20 to 25 years old group of multiple infections. Conclusion In view of the prevalence of HPV infection among health examination females and the genotype distribution, we recommend incorporating HPV52, 53 and 58 into future vaccine screening.
ObjectiveTo analyze the clinical characteristics and measures of diagnosis and treatment of renal transplant recipients complicated with Pneumocystis carinii pneumonia (PCP), in order to provide basis for prevention and treatment.MethodsThe clinical data of 82 renal transplant recipients complicated with PCP admitted to the West China Hospital of Sichuan University from January 2016 to December 2019 were retrospectively analyzed.ResultsThe median time from transplantation to diagnosis of PCP was 3.50 (2.78, 8.27) months, and 57 cases (69.51%) were occurred within 6 months. The main clinical manifestations were fever, cough and shortness of breath, and chest CT scan mainly showed ground-glass opacity and patchy shadows. The laboratory examination showed a decrease of lymphocyte, increased high-sensitivity C-reactive protein and (1-3)-beta-D glucan. All 82 patients (100%) were complicated with bacterial, virus infections or other fungal infections. The median time of diagnosis, treatment and hospital stay was 6.00 (3.00, 8.25) d, 20.00 (12.75, 32.25) d, 26.50 (20.75, 39.00) d, respectively. Sixty-six cases (80.49%) were discharged with effective treatment, yet 14 cases (17.07%) suffered a failed treatment and 2 cases (2.44%) died.ConclusionsThe incidence of PCP infection was highest within the first 6 months after renal transplantation, and multiple infections tend to easily occured. Early diagnosis should be made in combined with clinical manifestations, laboratory and imaging examinations, and individualized treatment should be taken early.
Objective To analyze the human leukocyte antigen (HLA) gene polymorphism and haplotype frequency and distribution in Han patients with end stage renal disease (ESRD) in Sichuan province, and explore the correlation of HLA gene polymorphism and haplotype with the susceptibility to ESRD in Sichuan Han patients. Methods Polymerase chain reaction-sequence specific oligonucleotide probe hybridization typing technique was used to detect the HLA-A, -B, -DRB1, and -DQB1 genotypes of Han patients with ESRD and healthy participants. The allele and haplotype frequencies in the ESRD group and the control group were analyzed using SPSS 25.0 and Arlequin 3.5.2.2 softwares. Results A total of 756 ESRD patients and 1118 healthy participants were enrolled. In the four loci of HLA-A, -B, -DRB1, and -DQB1, the frequency of HLA-B*39 allele in the ESRD group was higher than that in the control group [3.37% vs. 2.19%; χ2=4.850, P=0.028, odds ratio (OR)=1.558, 95% confidence interval (CI) (1.047, 2.319)], the frequency of HLA-DQB1*06 allele in the ESRD group was lower than that in the control group [17.39% vs. 21.20%; χ2=8.264, P=0.004, OR=0.783, 95%CI (0.662, 0.925)], and the frequency of HLA-DQB1*04 allele in the ESRD group was higher than that in the control group [7.41% vs. 5.46%; χ2=5.867, P=0.015, OR=1.386, 95%CI (1.063, 1.807)]. The frequencies of 10 haplotypes, including HLA-A*11-B*39, HLA-DRB1*15-DQB1*06, and HLA-DRB1*04-DQB1*04, were significantly different between the ESRD group and the control group (P<0.05), among which 9 haplotypes were possibly susceptible to ESRD and 1 haplotype was possibly protective. Conclusions HLA gene polymorphism is closely related to the susceptibility to ESRD. HLA-B*39 and HLA-DQB1*04 may be susceptible genes for ESRD in Sichuan Han patients, while HLA-DQB1*06 may be a protective gene. In addition, 10 HLA haplotypes are possibly associated with the susceptibility to ESRD in Sichuan Han patients.