Objective This study was carried out in order to analyze genetic diversity in plants of Dendrobium Sw. and compare the marker index (MI) between SRAP and RAPD markers. Methods Using 40 SRAP primer combinations and 36 RAPD primers,the genetic diversity of the materials in Dendrobium Sw. was amplified. Results A total of 1 977 loci were generated by 40 SRAP primer combinations,of which 90.2% was polymorphic and the genetic similarity (GS) ranged from 0.330 2 to 0.789 2. As for RAPD,281 bands were obtained,in which 87.1% was polymorphic,and the GS was from 0.494 2 to 0.773 1. There were some differences existing in the two cluster results revealed by SRAP and RAPD markers,they were as follows:compared to that of RAPD,the result of SRAP could more comfortably reflect the kinship and geographical origin,simultaneously conform to the traditional classification. For the experiment materials,SRAP (16.46) got an MI value 4.5 folds higher than that of RAPD (3.67),which meant SRAP markers were more effective in detecting genomic polymorphisms in the plants of Dendrobium Sw. Conclusion These results show that SRAP and RAPD could be applied to detecting genetic diversity analysis of plants in Dendrobium Sw. SRAP Also shows great superiority and advantage in this study.

Objective:To investigate effects of viola on macrophage TOLL-like receptor expression ,and tentatively explore the partial mechanism of viola intervention on macrophage function.Methods: Using viola water decoction lavage intervention in clean grade SD rats of conventional preparation containing serum ,In a certain concentration coculture with mouse peritoneal macrophages in 96-well plates.After 24 hours,cell phagocytosis activity was determined by neutral red uptake assay ,changes in expression levels of TLR-1,TLR-2,TLR-3,TLR-4,TLR-5 mRNAs were determined by RT-PCR.Results:Compared with the same concentration of normal serum group :(1 ) viola-containing serum group macrophage activity was significantly increased ( P<0.01 );( 2 ) Within certain concentration,viola containing serum group with increased or decreased expression levels of TLR -1,TLR-2,TLR-3 mRNA(P<0.05 or P<0.01 ) ,the expression level of TLR-4 was not significantly altered in each group ( P>0.05 ) ,and the expression level of TLR-5 was significantly increased in each group ( P<0.01 ).Conclusion:Viola-containing serum has obvious promoting effect on macrophage phag-ocytosis,the mechanism of which may be related to that this drug regulates and controls part of macrophage TOLL -like receptor expres-sion.

Objective To investigate the quality of life of post-operative patients with cholecystolithiasis and analyze the influencing factors. Methods About 206 patients with cholecystolithiasis were enrolled in the investigation by gastrointestinal quality of life index (GIQLI). Multivariate linear regression analysis was used to explore the influencing factors of their quality of life. Results The GIQLI score of 206 patients was (115.81 ±9.22) and the index value was 80.42%. Three independent variables such as breakfast habit, exercise, three hyperlipidemia, were the factors that affected the quality of life (P<0.05). Conclusions The quality of life of patients after cholelithiasis is lower than that of normal people. Patients should develop good eating habits and exercise habits, strengthen the interventions with high blood lipids, high blood pressure and hyperglycemia to improve the quality of life of post-operative patients with cholecystolithiasis.

Objective:To investigate the regulatory role of microRNA in radiation-induced heart disease (RIHD) in mice and provide a new strategy for its treatment.Methods:Based on the Gene Expression Omnibus database (GSE147241), which includes normal heart tissue and irradiation heart tissue, we conducted bioinformatics research and analysis to determine the differentially-expressed genes. Then, thirty male C57/BL6 mice were randomly divided into the control group, irradiation group and miR-133a overexpression intervention group. The heart received single dose of X-ray 20 Gy in the irradiation group and miR-133a overexpression intervention group, but not in the control group, and then fed for 16 weeks. Cardiac function was assessed by echocardiography. Myocardial fibrosis was detected by Masson staining. The expression levels of miR-133a, CTGF, COL-1 and COL-3 mRNA were detected by qRT-PCR. The expression levels of CTGF, COL-1 and COL-3 proteins were detected by western blot.Results:miR-133a was the differentially-expressed gene between the irradiation and control groups. Overexpression of miR-133a could mitigate the decrease in cardiac function and increase in myocardial collagen content ( P<0.01). Meantime, overexpression of miR-133a could down-regulate the expression levels of CTGF, COL-1, COL-3 mRNA and protein ( P<0.01). Conclusions:Radiation increases the synthesis of collagen and leads to myocardial fibrosis remodeling. Overexpression of miR-133a can alleviate the radiation-induced myocardial fibrosis.

Objective:To establish the C57BL/6 mouse models of radiation-induced cardiopulmonary dysfunction.Methods:Twenty-four male C57BL/6 mice were randomly divided into the control and irradiation groups. Mice in the irradiation group were irradiated with 20 Gy electron beam and bred for 6 months after irradiation. Cardiac function was assessed using ultrasonography. The partial pressure of oxygen was detected by blood gas analysis. Cell apoptosis was observed by Tunel assay. Myocardial and pulmonary fibrosis was assessed by Masson staining.Results:The LVEF in the irradiation group was (68.60±10.92)%, significantly less compared with (81.75±8.79)% in the control group ( P< 0.01). The apoptotic index of heart in the irraiation group was (23.90±6.60)%, considerably higher than (3.25±3.38)% in the control group ( P< 0.01). The CVF of heart in the irradiation group was (15.42±5.72)%, significantly higher than (1.45±0.64)% in the control group ( P< 0.01). The PaO 2 level in the irradiation group was (86.10±7.60) mmHg, significantly lower compared with (107.16±9.01) mmHg in the control group ( P< 0.01). The apoptotic index of lung in the irradiation group was (27.90±8.94)%, significantly higher than (2.50±3.55)% in the control group ( P<0.01). The CVF of lung in the irradiation group was (17.76±5.77)%, remarkably higher than (2.50±3.55)% in the control group ( P< 0.01). Conclusion:Radiation can induce cardiopulmonary apotosis and fibrosis remodeling, which leads to cardiopulmonary dysfunction, suggesting the successful establishment of C57BL/6 mouse model of radiation-induced cardiopulmonary dysfunction.

Objective:To investigate the regulatory effect of miR-26a in radiation-induced heart disease (RIHD) mice.Methods:C57/BL6 mice were used to establish RIHD models. The cardiac function, fibrosis, the expression levels of collagen 1 (COL1) and connective tissue growth factor (CTGF), and miR-26a were detected in RIHD mice. Whether CTGF was the target gene of miR-26a was verified by dual luciferase kit. Moreover, cardiac fibroblasts were transfected with miR-26a up and miR-26a down lentivirus vectors to construct the miR-26a overexpression and underexpression cell models. The expression of CTGF, proliferation, and apoptosis of cardiac fibroblasts were detected.Results:In the RIHD mice, heart function was decreased, myocardial fibrosis was remodeled, the expression levels of COL1 and CTGF were up-regulated, and the expression level of miR-26a was down-regulated. Dual luciferase reporter assay confirmed that CTGF was the target gene regulated by miR-26a. Overexpression of miR-26a could inhibit the expression of CTGF, suppress the proliferation of cardiac fibroblasts, promote cell apoptosis and secrete collagen. Underexpression of miR-26a yielded the opposite results.Conclusion:MiR-26a affects the function of cardiac fibroblasts by targeting CTGF and probably mediates the process of radiation-induced myocardial fibrosis, which may become a new regulatory target of RIHD.

Objective     To study the correlation of preoperative hemoglobin amount with venous thromboembolism (VTE) after surgical treatment of bronchiectasis and the clinical significance. Methods     A retrospective study was performed on patients with bronchiectasis who underwent surgical treatment in our center from June 2017 to November 2021. The differences in blood parameters between the VTE patients and non-VTE patients were compared. The relationship between preoperative hemoglobin and VTE was confirmed by quartile grouping and receiver operating characteristic (ROC) curve. Results     A total of 122 patients were enrolled, including 50 males and 72 females, with a mean age of 52.52±12.29 years. The overall incidence of VTE after bronchiectasis was 9.02% (11/122). Preoperative hemoglobin amount (OR=0.923, 95%CI 0.870-0.980, P=0.008) and D-dimer amount (OR=1.734, 95%CI 1.087-2.766, P=0.021) were independent influencing factors for VTE after bronchiectasis. The incidence of VTE after bronchiectasis decreased gradually with the increase of preoperative hemoglobin amount. The area under the ROC curve (AUC) of postoperative D-dimer alone was 0.757, whereas the AUC of postoperative D-dimer combined with preoperative hemoglobin amount was 0.878. Conclusion     Low preoperative hemoglobin is an independent risk factor for postoperative VTE. Postoperative D-dimer combined with preoperative hemoglobin amount has a better predictive performance compared with postoperative D-dimer alone for postoperative VTE.