Objective To investigate the risk factors for coronary artery lesions (CALs) in children with Kawasaki disease (KD) in Lanzhou. Methods One hundred and seventy-four children with diagnosed KD were divided into CAL group and non-CAL group based on the existence of concurrent CALs. The age, gender, fever duration, intravenous immunoglobulin (IVIG) start time, IVIG dose, C-reactive protein (CRP), serum albumin, erythrocyte sedimentation rate (ESR), platelet (PLT), red blood cell count (RBC), hemoglobin and so on were compared. Results Among the 174 children, 46 children (26.44%) were complicated by CALs and 128 children were not. The differences of average fever duration, IVIG starting time, IVIG dose, PLT, CRP, ESR and RBC were statistically signiifcant (P<0.05). Conclusions When KD children has the fever durations>10 d, start of IVIG af-ter 10 days of fever, increase of PLT, CRP and ESR and decrease of RBC, clinicians should be alert to the risk of concurrent CAL.

Objective:To investigate the relationship between orthostatic intolerance (OI) and body mass index (BMI), blood lipid and serum protein levels in children and adolescents.Methods:A total of 122 children and adolescents aged from 6 to 17 years old, who were diagnosed with OI at the Department of Pediatric Cardiology, the Second Hospital of Lanzhou University from April 2018 to April 2019, were selected as the subjects.While, 56 children and adolescents in the health management center were selected as the healthy control group during the same period.Subjects were divided into syncope group and non-syncope group according to whether there was syncope in clinical history.The height and body mass of all children were measured, and venous blood were taken to detect blood lipids and serum protein in the morning.Date analysis were conducted with SPSS 22.0 software.Results:(1) The level of triglyceride in the OI group was lower than that in the healthy control group[(0.98±0.45) mmol/L vs. (1.28±1.04) mmol/L], and there was statistically significant( t=2.025, P<0.05); the BMI were respectively (17.56±3.23) kg/m 2 and (16.46±2.58) kg/m 2 in syncope group and non-syncope group, whose result indicated that the BMI in syncope group was higher than that in non-syncope group( t=2.085, P<0.05). (2) The results of binary Logistic regression analysis showed that the triglyceride level was an independent risk factor for OI( OR=0.504, 95% CI: 0.272-0.931, P<0.05). (3) The receiver operating characteristic curve evaluated the predictive value of triacylgly-cerol to OI.Results showed the sensitivity and specificity of OI were respectively 72.1% and 48.2%when the triacylglycerol was 1.09 mmol/L. Conclusions:Low triglyceride level and high BMI may be susceptible factors to OI in children and adolescents.Therefore, the diet of children with OI should be highly valued by clinicians and parents.

Objective:To construct and evaluate the effect of precise oral nutrition guidance program for colorectal cancer patients with accelerated rehabilitation after operation.Methods:This study was a quasi experimental study. A total of 116 patients with colorectal cancer from department of Colorectal Surgery, Jiangsu Cancer Hospital from March to Deamber, 2021 were selected by convenience sampling method. They were divided into two groups according to their admission time, the experimental group (58 cases), was given precise oral nutrition guidance program after colorectal cancer surgery based. In the control group, 58 cases were treated with the conventional dietary guidance for rapid rehabilitation. The gastrointestinal tolerance rate, the compliance rate of oral nutritional supplements, the first defecation time after operation, albumin, total albumin, prealbumin and other nutritional indexes were compared between the two groups before and after intervention.Results:Finally, 111 cases were included, induding 56 in the experimental group and 55 in the control group. The compliance rate of oral nutritional supplements after intervention in the experimental group was 73.2% (41/56), higher than that in the control group 40.0%(22/55), and the difference between the two groups was statistically significant ( χ2 = 12.47, P<0.05). The first defecation time after operation in the experimental group was (29.51 ± 5.52) h, while in the control group was (61.48 ± 8.39) h, the difference between the two groups was significant ( t = -12.06, P<0.05). The postoperative enteral nutrition tolerance rate of the experimental group was 91.1% (51/56), which was higher than the 69.1%(38/55) in the control group, the difference between the two groups was statistically significant ( χ2 = 8.44, P<0.05). The serum total protein, albumin and prealbumin levels of the experimental group at discharge were (66.56 ± 5.15), (46.78 ± 7.62) g/L and (276.07 ± 53.57) mg/L, compared with the (60.27 ± 4.37), (39.12 ± 6.41) g/L and (230.14 ± 44.58) mg/L in the control group, the differences were statistically significant ( t = 6.66, 5.02, 4.91, all P<0.05). Conclusions:The implementation of precise oral nutrition guidance program is conducive to guiding the clinical practice of oral nutritional supplements in patients with colorectal cancer after surgery, improving patient compliance, reducing gastrointestinal intolerance, promoting intestinal function recovery, and improving nutritional status of patients.

Exonuclease Ⅷ (Exo Ⅷ), an ATP-independent dsDNA 5'-3' exonuclease, is a candidate protein with great application value for in vitro DNA recombination. However, the application of Exo Ⅷ in DNA recombination in vitro has not been reported. In this study, the recombinant expression vector of the truncated Exo Ⅷ (tExo Ⅷ) with the full exonuclease activity was built and used to achieve the overexpression of tExo Ⅷ in Escherichia coli. Based on the purified tExo Ⅷ protein with high-purity, the feasibility of tExo Ⅷ applied in vitro DNA recombination and effects of the reaction temperatures, reaction duration, and homology arm lengths were examined. The results showed that tExo Ⅷ was highly expressed in soluble form in E. coli. One liter of bacterial culture yielded 92.40 mg of purified tExo Ⅷ with the specific activity of 1.21×10⁵ U/mg. In a 10 μL recombination system containing 2.5 U tExo Ⅷ, the highest cloning efficiency was achieved in a reaction at 25 °C for 12.5 min and followed by incubation at 50 °C for 50 min. With addition of Pfu DNA polymerase, the homology arm extension strategy can effectively improve the recombination efficiency. Using competent E. coli Mach1 T1 with 2.2×10⁶ cfu/μg transformation efficiency as recipient cell, the recombination of a 1 kb fragment with a 21 bp homology arm and a 5.8 kb linearized vector can form about 1.1×10⁴ recombinant clones per μg vector, and the positive rates was over 80%. The recombination efficiency was increased with the increasing length of homology arm ranged from 8 to 21 bp. Under the optimal reaction condition, only 8 bp homology arm can still achieve valid DNA recombination. This novel in vitro DNA recombination system mediated by tExo Ⅷ was particularly characterized by its easy preparation, no limitation on restriction sites and high recombination cloning efficiency. All results revealed that the new efficient gene cloning system has potential application in the field of molecular biology.
Cloning, Molecular ; Escherichia coli ; genetics ; Exonucleases ; genetics ; Recombinant Proteins ; metabolism ; Recombination, Genetic