Objective To study clinical efficacy of ulinastatin combined with naloxone in patients with cardiogenic shock(CS) after acute myocardial infarction (AMI).Methods Eighty patients with CS after AMI were randomly divided into routine treatment group (n =19),ulinastatin group (n =20),naloxone group (n =21) and ulinastatin combined with naloxone group (n =20).The levels of serum cardiac troponin I (cTnI),brain natriuretic peptide(BNP),tumor necrosis factor-α(TNF-α) and interleukin-6 (IL-6)were measured before and a week after treatment.In the meantime,recovery time of shock,the average hospitalization days and 28-day mortality rate were recorded.Results After the treatment,the levels of serum cTnI,BNP,TNF-α and IL-6decreased in all groups(P ＜ 0.01),and there was significant difference on the decreasing degree of cTnI,BNP,TNF-α and IL-6 in ulinastatin combined with naloxone group when compared with those in routine treatment group,ulinastatin group and naloxone group(cTnI:(1.04 ± 0.17) ng/L vs.(2.06 ± 0.15) ng/L,(1.59 ± 0.16)ng/L,(1.97 ± 0.14) ng/L; BNP:(143.21-56.94) ng/L vs.(261.07 ± 71.43) ng/L,(203.46 ± 65.73) ng/L,(252.96 ± 68.85) ng/L; TNF-α:(13.42 ± 8.93) ng/L vs.(31.21 ± 12.32) ng/L,(20.39 ± 11.08) ng/L,(28.98 ± 11.76) ng/L ; IL-6:(37.58 ± 11.14) ng/L vs.(80.46 ± 27.15) ng/L,(59.84 ± 20.72) ng/L,(76.15 ±26.45) ng/L; P ＜ 0.01).The recovery time of shock,the average hospitalization days and 28-day mortality rate in ulinastatin combined with naloxone group were significantly lower than those in routine treatment group,ulinastatin group and naloxone group(recovery time of shock:(7.16 ± 1.52) d vs.(11.43 ± 2.40) d,(8.05 ±1.81)d,(8.74 ± 1.98)d;the average hospitalization days:(15.03 ±3.23)d vs.(22.64 ±4.18)d,(18.93 ±3.97)d,(19.21 ±3.94)d ;28-day mortality rate:(41.62％ vs.61.20％,50.74％,52.31％ ; P ＜0.01)).Conclusion The application of ulinastatin combined with naloxone can effectively inhibit the cardiac injury and inflammatory response,promote the recovery of circulation function and improve prognosis in patients with CS after AMI.

To investigate the expression of polyadenosine diphospho-ribose polymerase 1 (PARP-1) and p16/ retinoblastoma (Rb) protein in hydroquinone (HQ)-induced TK6 cells and their regulatory mechanisms. Methods According to the 2×2 factorial design model, TK6 cells were divided into PBS-TK6 group and HQ-TK6 group based on HQ exposure, and then sub-divided into non-DOX intervention subgroup and DOX intervention subgroup based on DOX intervention, a total of four groups. The PBS-TK6 group was treated with phosphate buffer saline, and the HQ-TK6 group was treated with HQ at a final concentration of 20.0 μmol/L. The non-DOX intervention subgroup was added with 0.05% dimethyl sulfoxide; and the DOX intervention subgroup was added with PARP-1 agonist DOX at a final concentration of 0.5 μmol/L. The distribution of cell cycle was detected by flow cytometry. The protein expression of p16/Rb, cyclin D1 (cyclinD1), multifunctional protein E2 transcription factor 1 (E2F1), Rb, and p-Rb were detected by Western blot, and the level of p16 ribosylation was detected by immunofluorescence and immunoprecipitation. Results Compared with the PBS-TK6 group, the cell cycle distribution percentage in G0/G1 phase and the relative expression levels of p16 proteins were decreased in the cells of the HQ-TK6 group (all P<0.05). The cell cycle distribution percentage in S phase and the relative expression levels of cyclinD1 and p-Rb proteins were up-regulated (all P<0.05). Compared with the non-DOX intervention group, the cell cycle distribution percentage in G0/G1 and G2/M phases and the relative expression level of p16 protein increased in the DOX intervention group (all P<0.05). The percentage of cells in S phase and the relative expression levels of cyclinD1 and p-Rb proteins were down-regulated (all P< 0.05). The results of interaction effect analysis showed that compared with the non-DOX PBS-TK6 cells, the relative expression levels of Rb and E2F1 protein in the DOX PBS-TK6 cells intervention group were down-regulated (all P<0.05). The relative expression level of Rb protein in non-DOX HQ-TK6 cell group was down-regulated (P<0.05), and the relative expression of E2F1 protein was up-regulated (P<0.05). Compared with DOX PBS-TK6 cell group, the relative expression level of Rb protein in DOX HQ-TK6 cell group was down-regulated and that of E2F1 protein was up-regulated (all P<0.05). Compared with the non-DOX HQ-TK6 cell group, the relative expression level of Rb protein in the DOX HQ-TK6 cell group was up-regulated and that of E2F1 protein was down-regulated (all P<0.05). Conclusion PARP-1 participates in cell cycle regulation by regulating the p16/Rb signaling pathway in TK6 cells.

Objective To investigate the expression of CXCR6 in allograft rejection and effect of CXCL16/CXCR6 interaction on allograft survival Methods Intra-abdominal heterotopic heart transplantation was performed using wild type (WT) Balb/c mice (H-2d) (allogeneic) as donors or WT C57BL/6 mice (B6, H-2b) (syngeneic) as donors, and using WT B6 mice as recipients. The intragraft expression of CXCR6 and expression of CXCR6 in CD8+ T cells of the spleens from syngeneic and allogeneic recipients were examined. The allogeneic recipients were further divided into the experimental group (n = 5) and control group (n = 6) randomly. The experiment group and control group were injected with anti-CXCL16 mAb or control mAb respectively until rejection occurred. The cardiac allograft survival in experimental group and control group was evaluated. Results Rejected allografts showed higher expression of CXCR6 than syngeneic cardiac grafts. More importantly,expression of CXCR6 in CD8+ T cells was also up-regulated by allograft rejection. However, injection of anti-CXCL16 mAb could not inhibit cytotoxic activity of CD8+ T cells. Moreover, experimental group could not prolong the cardiac graft survival time as compared with control group. Conclusion Expression of CXCR6 in CD8+ T cells is up-regulated in allograft rejection.

Background Organic ultraviolet (UV) filters are widely used in personal care products. So far, relevant studies on organic UV filters in indoor dust have been reported. Objective This study aims to establish a thermal desorption combined with gas chromatography-mass spectrometry (TD-GCMS) method to identify organic UV filters in indoor air collected from different indoor environments, so as to reveal the pollution levels and characteristics of organic UV filters in indoor environment. Methods Based on the standard indoor air sampling protocol, a total of 60 samples were collected from eight different kinds of indoor environments (male and female dormitory rooms, offices, labs, barber shops, printing shops, hotels, and private cars) on and nearby Minhang Campus of Shanghai Jiao Tong University from August to November, 2020. The concentrations of six common organic UV filters, including homosalate (HMS), 2-ethylhexyl salicylate (EHS), 3-(4-methylbenzylidene)-camphor (4-MBC), isoamyl 4-methoxycinnamate (IMC), octocrylene (OC), and octyl 4-methoxycinnamate (EHMC), in the air of different indoor environments were detected by TD-GCMS. Furthermore, the correlations of individual organic UV filters in different indoor environments were analysed. Results Under optimized detection conditions, the correlation coefficients of the quantitative standard curves of selected six organic UV filters were all at or above 0.997. The relative standard deviations of 1 mg·L⁻³ samples ranged from 1.74% to 7.11%, and the recoveries ranged from 67.17% to 106.5%. The relative standard deviations of 10 mg·L⁻³ samples ranged from 3.59% to 8.76%, and the recoveries ranged from 78.80% to 126.60%. The detection rates of the other five organic UV filters except IMC were all at or more than 92% in eight different kinds of indoor air. The median concentration of total organic UV filters was 75.17 ng·m⁻³, and EHS presented the highest median concentration of 28.55 ng·m⁻³. Regarding different indoor environments, the highest concentration of total organic UV filters was found in the female dormitory samples, 154.98 ng·m⁻³. The respective pair-analysis among HMS, EHMC, OC, and EHS of all indoor air samples reached a significant level of correlation (r=0.40-0.61, P<0.01). Conclusion The TD-GCMS method is satisfactory for the determination of organic UV filters in indoor air. EHS, EHMC, HMS, OC, and 4-MBC are identified in selected eight indoor environments, and they may have similar sources of pollution.