ObjectiveTo evaluate whether oral administration of Chinese tradiational medicine,Qing-Xue granula,can prevent mouse lung injury caused by thoracic radiation.Methods128 BalB/C mice were divided into 4 groups:control (C) group; radiation (R) group; radiation plus high dose Qing-Xue granula (H) group and radiation plus median dose Qing-Xue granula ( M ) group.The H and M groups were fed 0.64 g and 0.32 g of Qing-Xue granula dissolved in 0.5 nl anline once daily for two months,which were 4 and 2 times of human dosage,respectively.Whole thorax radiation of 12 Gy was delivered with a single ventral-dorsal field with 6 MV X-ray.Group C and group R received 21 days of 0.5 ml saline feeding.Mice were sacrificed at 1,2,4 or 6 months after radiation. Macrophage cell count of lung lavage fluid and hydroxyproline content of left lung were assayed,and the lung fibrosis was scorred according to the Ashcroft's criteria.The plasma interleukin-6 (IL-6) and vascular endothelial growth factor (VEGF) concentration were assayed with ELISA method.The One-way ANOVA was used to test the significance of any differences between groups at each time point. Results The macrophage cell number of lung lavage fluid was significantly lower in the 1st month in group M than in group R (2∶4,q =3.92,P ＜ 0.05 ),but had no significant difference between group M and C ( 1 ∶ 4,q =2.13,P＞0.05 ).The hydroxyproline content of group H was significantly lower than group R in the 1st and 6th months (q =3.62,3.54,all P ＜ 0.05 ),but still higher than group C ( q =4.09,3.72,all P ＜ 0.05 ).The fibrosis score of group H was significantly lower than group R in the 2nd,4th and 6th months (q=3.38 -4.16,all P＜0.05).The IL-6 concentration of group H was significantly lower than group R in the 1st month ( q=3.53,P＜0.05 ),but not significantly higher than group C (q =1.41,P＞0.05).The VEGF concentration was significantly higher in group R than group C since the 2nd month ( q =3.12 - 3.78,P ＜ 0.05 ).The VEGF concentration was significantly higher in group H and M than group R in the 2nd and 6th months ( q =3.08 - 3.92,all P ＜ 0.0 5 ).Conclusions Oral Chinese traditional medicine,Qing-Xue granula,could prevent radiation induced lung fibrosis in mice,especially at high dosage.The degree of elevation of VEGF in plasma was not parallel with that of lung fibrosis.

ObjectiveTo evaluate the effect on lung injury of gefitinib or/and radiation.Methods Totally 160 mice were divided into five groups:control (C) ;gefitinib (G) ;radiation (R) ;gefitinib followed by irradiation ( G + R) ;and R + G.12 Gy irradiation was delivered.Geiitinib fed by 200 mg/kg once daily for 3 weeks.Mice were sacrificed on 1,2,4 or 6 months after radiation.Macrophage count of lung lavage fluid and hydroxyproline assessed,lung fibrosis scored.and plasma TGF-β1 concentration assayed.One-way ANOVA was used to test the significance. Results The lung lavage macrophage cell number were significantly higher in group R,R + G and G + R than group C ( q =2.95 - 8.61,all P ＜ 0.05 ) on 4 and 6months,yet no significant difference between the three groups ( q =0.37 -3.49,all P ＜ 0.05 ) ; The macrophage was significantly lower in month 1,4 and 6 in group G than R,R + G and G + R ( q =3.37- 6.25,all P ＜ 0.05 ).The hydroxyproline content and the fibrosis score of G,R,R + G and G + R were significantly higher than C ( q =3.14 - 4.76,all P ＜ 0.05 ),but no significant difference between the four groups ( q =0.70 - 4.19,all P ＞ 0.05 ).The TGF-β1 concentration of R,G + R,R + G at all time points and TGF-β1 concentration of G at 1 st and 2nd months were significantly higher than C ( q =3.76 -8.09,all P ＜ 0.05).ConclusionsGefitinib could cause lung fibrosis in vivo in BalB/C mouse.The combination of gefitinib and radiation did not significantly exacerbate lung injury caused byeither alone.The mechanism of lung fibrosis caused by gefitinib might be different from that by radiation which needs further research.

The changes of carotid intima media thickness (cIMT) in type 2 diabetic patients with vitamin D insufficiency and subclinical macrovascular disease after 12 months' intervention therapy with calcitriol were observed.86 patients with vitamin D insufficiency [25 (OH) D＜30 ng/ml] and subclinical macrovascular disease were randomized to group A (n =44,treated with 0.5 μg/day calcitriol) or group B (n =42,blank control) for 12 months.40 patients in each group completed the follow up.After 12 months of therapy with calcitriol (0.5 μg.qd.po.),levels of high sensitive-Creactive protein,sCD36,and cIMT were significantly decreased,while 25 (OH) D and ankle brachial index were significantly increased (P＜0.05) in group A,suggesting that calcitriol could improve cIMT in patients with vitamin D insufficiency and subclinical macrovascular disease.

Objective To evaluate the relationship between CD4+ T lymphocyte count and results of enzyme-linked immunospot (ELISPOT) assay in human immunodeficiency virus (HIV)-Mycobacterium tuberculosis (M.tb) coinfected patients.Methods A total of 193 HIV-infected individuals in Yunnan Province and Shanghai were enrolled.T-SPOT.TB assay was employed to detect M.tb specific T lymphocyte in the peripheral blood mononuclear cells (PBMC).CD4+ T lymphocyte in PBMC from the enrolled subjects was detected by flow cytometry.Data were analyzed using t test.ResultsThe incidence of latent tuberculosis in HIV-infected individuals was 30.6％.The CD4+ T lymphocyte counts in HIV-infected individuals with active tuberculosis were 190×106/L,which were significantly lower than those in HIV-infected individuals with latent tuberculosis (484×106/L; t=6.665,P＜0.01).The HIV-infected individuals were stratified according to CD4+ T lymphocyte counts of ＞500×106/L,200×106-500×106/L,and ＜200×106/L and the constituent ratios of active tuberculosis/latent tuberculosis were 1∶16.2,1∶1.3 and 5.6∶1,respectively.Among 79 subjects with positive T-SPOT.TB results,20 were coinfected with active tuberculosis,in which 14 had CD4+ T lymphocyte counts of ＜200 ×106/L,5 had 200×105-500×106/L and 1 had ＞500×106/L.Fifty-two in 59 HIV/latent tuberculosis patients individuals had CD4+ T lymphocyte counts of ＞200×106/L.ConclusionsThe prevalence of latent tuberculosis in HIV-infected individuals is high in China.Cellular immunity in HIV-infected individuals with active tuberculosis is severely impaired.With the decrease of CD4 ′ T lymphocyte counts,patients with latent tuberculosis are prone to develop active tuberculosis in HIV-infected individuals.The negative predictive value of T-SPOT.TB is significantly diminished in patient with low CD4+ T lymphocyte counts,especially less than 200×106/L.

Objective To explore the characteristic of ACE gene I/D polymorphism in Han broad jumpers .Methods Distribu‐tion of ACE gene I/D polymorphism for broad jumpers was analyzed by PCR ,DNA sequencing ,Hardy‐Weinberg and SPSS ,and the results were compared with that of normal people .Results There were II ,DD and ID in gene ACE 16 ,and the Hard‐Weinberg re‐sults showed that the subjects were group representative .The ACE DD genotype and D allele in broad jumpers was statistically higher than normal controls (P<0 .05) .Conclusion The results suggest that ACE DD genotype and D allele are associated with training sensitivity of broad jumpers and could be the molecular marker for athletes choosing genetically .

Objective:To analysis the construction of the world's top PhaseⅠclinical trial registration agencies, compare their size, composition, operation and funding, to provide further reference for the construction of clinical trial agency in China.Methods:Search for PhaseⅠclinical trial research agencies by region on clinicaltrials.gov. Collecting information about the agency’s management, staffing, implementation in Asia, America and Europe. Descriptive analysis was carried out to explore the type, proportion and operation among different regions, the organizational structure, operational management and effectiveness of each agency from different regions were compared.Results:The United States, Europe and East Asia are dense areas of PhaseⅠclinical research around the world. The types of agencies in the United States, Britain, France, Germany, South Korea, Japan, and Israel are mainly enterprises. Among other types of agencies, the organizational models are diversified. The agencies have different spatial distances from medical institutions, but possess relatively consistent scale and institutional operation. All the agencies have a stable source of funding.Conclusions:In order to strengthen the construction of clinical trial agencies in China, we should speed up the establishment of a close connection mechanism to promote deep cooperation in clinical trials. Control the construction scale and maintain stable input of the agency. Meanwhile, establish and strengthen international exchanges and cooperation.

Objective:To study the international situation of technology innovation and transfer, to improve the performance in the health field of China.Methods:Collect data and status quo of innovation and transformation of scientific and technological achievements in 10 World-class research universities and hospitals through literature review, and conduct summary analysis.Results:According to the study, the health field is the main arena of technology innovation and transfer in which the status of the main body of innovation of hospitals cannot be ignored, and the transformation ability of some hospitals is higher than universities.Technology innovation and transfer in the health field is characterized by multiple disciplines, long-term and high cost, and it is necessary to build a full ecological chain from research and development (R&D) to production and commercialization.Conclusions:The dominant position of the health field and hospitals in technology innovation and transfer needs to be emphasized.Interdisciplinary collaboration and innovative economy building should be strengthened.

Objective:To investigate the effects of different blood purification methods on their nutritional status and inflammatory response in elderly patients with chronic renal failure.Methods:A total of 120 elderly patients with chronic renal failure who were treated in Lishui People′s Hospital from January 2020 to January 2022 were selected as the research objects, and they were divided into the control group and the observation group according to the random number table method, with 60 cases in each group. The patients in the control group were given hemodialysis alone, and the patients in the observation group were given hemofiltration dialysis treatment on the basis of the patients in the control group. The nutritional status-related indicators, inflammation-related indicators and renal function-related indicators before and after treatment were compared between the two groups.Results:After treatment, the levels of serum total protein (TP), albumin (ALB), hemoglobin (HGB) and creatinine clearance (Ccr) in the observation group were significantly higher than those in the control group: (65.61 ± 4.82) g/L vs. (61.26 ± 3.51) g/L, (36.54 ± 4.52) g/L vs. (31.53 ± 3.32) g/L, (97.58 ± 5.84) g/L vs. (93.06 ± 5.17) g/L, (41.88 ± 4.87) ml/min vs. (34.51 ± 4.36) ml/min, while the levels of interleukin-6 (IL-6), C-reactive protein (CRP), tumor necrosis factor-α (TNF-α), creatinine (Cr) and blood urea nitrogen (BUN) were significantly lower than those in control group: (120.09 ± 9.36) ng/L vs. (157.17 ± 14.27) ng/L, (7.15 ± 1.16) mg/L vs. (14.17 ± 2.74) mg/L, (22.14 ± 6.67) ng/L vs. (33.87 ± 7.28) ng/L, (327.16 ± 44.35) μmol/L vs. (378.59 ± 48.27), (10.15 ± 2.03) mmol/L vs. (15.83 ± 3.31) mmol/L, there were statistical differences ( P<0.05). Conclusions:For elderly patients with chronic renal failure, the use of hybrid blood purification can significantly reduce toxins in the body and improve the nutritional status and inflammation of patients, which is worthy of clinical promotion.

Objective: To investigate the effect of macrophage migration inhibitory factor (MIF) on the biology of glioma U87MG and U251 cells. Methods: Silencing MIF gene expression in U87MG cells by RNA interference was monitored by Western blot. MIF low expressing U251 cells were treated at different concentrations of recombinant human MIF (rhMIF) and scratching test and flow cytometry were used to detect cell migration and apoptosis. The protein expression of bcl-2, bax, AKT, p-AKT was detected by Western blot. Results: The ability of migration and anti-apoptosis of U87MG cells silenced by siRNA decreased significantly, and the expression levels of p-AKT and anti-apoptotic protein bcl-2 also decreased; in contrast, the expression level of apoptosis protein bax increased. With increase of rhMIF treatment concentration, the expression levels of MIF protein, p-AKT and bcl-2 in U251 cells were gradually enhanced, whereas the level of apoptosis protein bax was inhibited. Conclusion MIF promotes cell migration and inhibits apoptosis of both U87MG and U251 cells, likely through the regulation of PI3K/AKT signaling pathway.

Background: Antimicrobial peptides (AMPs) have been identified as promising compounds for consideration as novel antimicrobial agents. Objectives: This study analyzed the efficacy of cecropin B against Haemophilus parasuis isolates through scanning electron microscopy (SEM) and atomic force microscopy (AFM) experiments. Results: Cecropin B exhibited broad inhibition activity against 15 standard Haemophilus parasuis (HPS) strains and 5 of the clinical isolates had minimum inhibition concentrations (MICs) ranging from 2 to 16 μg/mL. Microelectrophoresis and hexadecane adsorption assays indicated that the more hydrophobic and the higher the isoelectric point (IEP) of the strain, the more sensitive it was to cecropin B. Through SEM, multiple blisters of various shapes and dents on the cell surface were observed. Protrusions and leakage were detected by AFM. Conclusions Based on the results, cecropin B could inhibit HPS via a pore-forming mechanism by interacting with the cytoplasmic membrane of bacteria. Moreover, as cecropin B concentration increased, the bacteria membrane was more seriously damaged. Thus, cecropin B could be developed as an effective anti-HPS agent for use in clinical applications.