Assessment by meta-analysis of interferon-gamma for the diagnosis of tuberculous peritonitis

AIM:To investigate the performance and diagnostic accuracy of interferon-gamma(IFN-γ) for tuberculous peritonitis(TBP) by meta-analysis.METHODS:A systematic search of English language studies was performed.We searched the following electronic databases:MEDLINE,EMBASE,Web of Science,BIOSIS,LILACS and the Cochrane Library.The Standards for Reporting Diagnostic Accuracy initiative and Quality Assessment for Studies of Diagnostic Accuracy tool were used to assess the methodological quality of the studies.Sensitivity,specificity,and other measures of the accuracy of IFN-γ concentration in the diagnosis of peritoneal effusion were pooled using random-effects models.Receiver operating characteristic(ROC) curves were applied to summarize overall test performance.Two reviewers independently judged study eligibility while screening the citations.RESULTS:Six studies met the inclusion criteria.The average inter-rater agreement between the two reviewers for items in the quality checklist was 0.92.Analysis of IFN-γ level for TBP diagnosis yielded a summary estimate:sensitivity,0.93(95%CI,0.87-0.97);specificity,0.99(95%CI,0.97-1.00);positive likelihood ratio(PLR),41.49(95%CI,18.80-91.55);negative likelihood ratio(NLR),0.11(95%CI,0.06-0.19);and diagnostic odds ratio(DOR),678.02(95%CI,209.91-2190.09).χ 2 values of the sensitivity,specificity,PLR,NLR and DOR were 5.66(P = 0.3407),6.37(P = 0.2715),1.38(P = 0.9265),5.46(P = 0.3621) and 1.42(P = 0.9220),respectively.The summary receiver ROC curve was positioned near the desirable upper left corner and the maximum joint sensitivity and specificity was 0.97.The area under the curve was 0.99.The evaluation of publication bias was not significant(P = 0.922).CONCLUSION:IFN-γ may be a sensitive and specific marker for the accurate diagnosis of TBP.The level of IFN-γ may contribute to the accurate differentiation of tuberculosis(TB) ascites from non-TB ascites.

Effectiveness of interferon-gamma release assays for differentiating intestinal tuberculosis from Crohn's disease:A meta-analysis

AIM:To investigate the clinical usefulness of interferon-gamma release assays(IGRAs)in the differential diagnosis of intestinal tuberculosis(ITB)from Crohn’s disease(CD)by meta-analysis.METHODS:A systematic search of English language studies was performed.We searched the following databases:Medline,Embase,Web of Science and the Cochrane Library.The Standards for Reporting Diagnostic Accuracy initiative and Quality Assessment for Studies of Diagnostic Accuracy tool were used to assess the methodological quality of the studies.Sensitivity,specificity,and other measures of the accuracy of IGRAs in the differential diagnosis of ITB from CD were pooled and analyzed using random-effects models.Receiver operating characteristic curves were applied to summarize overall test performance.Two reviewers independently judged study eligibility while screening the citations.RESULTS:Five studies met the inclusion criteria.The average inter-rater agreement between the two reviewers for items in the quality checklist was 0.95.Analysis of IGRAs for the differential diagnosis of ITB from CD produced summary estimates as follows:sensitivity,0.74(95%CI:0.68-0.80);specificity,0.87(95%CI:0.82-0.90);positive likelihood ratio,5.98(95%CI:3.79-9.43);negative likelihood ratio,0.28(95%CI:0.18-0.43);and diagnostic odds ratio,26.21(95%CI:14.15-48.57).The area under the curve was 0.92.The evaluation of publication bias was not significant(P=0.235).CONCLUSION:Although IGRAs are not sensitive enough,they provide good specificity for the accurate diagnosis of ITB,which may be helpful in the differential diagnosis of ITB from CD.

The Expression of Interleukin-17, Interferon-gamma, and Macrophage Inflammatory Protein-3 Alpha mRNA in Patients with Psoriasis Vulgaris

Summary: To investigate the role of Interleukin-17 (IL-17), Interferon-gamma (IFN-γ), and macrophage inflammatory protein-3 alpha (MIP-3α) in the pathogenesis of psoriasis, reverse transcriptase-polymerase chain reaction (RT-PCR) was used to semi-quantitatively analyze the mRNA expression of IL-17, IFN-γ, and MIP-3α in 31 psoriatic lesions and 16 normal skin tissues. The results showed that the mRNA of the three cytokines was present in all specimens. And the expression level of IL-17 mRNA in skin lesions was 1.1416±0.0591, which was significantly higher than that in normal controls (0.8788±0.0344, P<0.001). The expression levels of IFN-γ mRNA were 1.1142±0.0561 and 0.9050±0.0263, respectively, with significant difference(P<0.001). And the expression levels of MIP-3α mRNA in psoriatic lesions was 1.1397±0.0521, which was markedly higher than that in normal controls (0.8681±0.0308, P<0.001). These findings indicate that up-regulated expression of IL-17, IFN-γ, and MIP-3α might be involved in the pathogenesis of psoriasis.

Performance and correlation of interferon gamma release assays and tuberculin skin test in HIV-infected children and adolescents with immune reconstitution

Objective:To evaluate the performance of interferon gamma release assays and tuberculin skin test in HIV-infected children and adolescents with immune reconstitution.Methods:A cross-sectional study was conducted in HIV-infected patients aged 5-18 years receiving antiretroviral treatment with CD4 T-lymphocytes>25%or>500 cells/mm3 for at least 6 months.QuantiF ERON-TB Gold,T-SPOT.TB,and tuberculin skin test were performed in each patient.Results:A total of 50 patients were enrolled with median age of 13.7 years,CD4 counts of 753(IQR:587-989)cells/mm3.Among 27 patients with tuberculosis(16)or tuberculosis exposure(11),8(29.6%)were positive to at least one test,2(7.4%)were positive QuantiFERON-TB Gold,3(11.1%)positive T-SPOT.TB,and 7(25.9%)had tuberculin skin test≥5 mm.Among 23 patients without history of tuberculosis or exposure,all had negative interferon gamma release assays,while 2(8.7%)had positive tuberculin skin test.Conclusions:All tests had low sensitivity despite immune reconstitution.

Capillary Electrophoretic Immunoassay with Laser-induced Fluorescence Detection for Interferon-gamma

Capillary electrophoretic immunoassay with laser-induced fluorescence detection for recombinant human interferon-gamma (IFN-g) was established. The limits of detection for three forms of IFN-g are 6.9 ng/L, 5.7 ng/L and 5.0 ng/L, respectively.

Retinal stem cells transplantation combined with copolymer-1 immunization reduces interferon-gamma levels in an experimental model of glaucoma

· AIM: To explore the effect of immunization with copolymer-1 (COP-1) and retinal stem cells (RSCs) transplantation on interferon-gamma (IFN-γ) levels in a rat experimental glaucoma model. · METHODS: An experimental glaucoma was induced by argon laser photocoagulation of the episcleral veins and limbal plexus in the right eye of rats. Immediately following glaucoma induction, rats were immunized with COP-1. RSCs were cultured and transplanted intravitreally into the eyes of glaucoma model animals 1 week post-laser treatment. Six experimental groups were used: COP-1/RSC, PBS/RSC, COP-1/PBS, PBS/PBS, glaucoma model group, and a normal control group. The concentration of IFN-γ in aqueous humor (AH) and serum was measured by enzyme-linked immunosorbent assay (ELISA) in each of the six groups. Retinal ganglion cell (RGC) survival was assessed by quantifying apoptosis using Hoechst staining. · RESULTS: Concentrations of IFN-γ in AH and serum of rats that had undergone glaucoma induction were higher than those of non-induced control rats. The concentrations of IFN-γ in AH and serum of the COP-1/RSCs treated group were determined to be 2371.9ng/L and 710.9ng/L, respectively, which were significantly lower than those in the other treated groups (P <0.05). In fact, IFN-γ levels in the dual treated group were reduced to background levels. The COP-1/RSC group had lower number of apoptotic RGCs than the other three experimental groups (P <0.05). · CONCLUSION: The reduced levels of IFN-γ in AH and serum of the COP-1/RSC group may be related to synergistic effects between RSCs transplantation and COP-1 immune modulation. It is likely that the lower levels of IFN-γ prevented RGCs glaucomatous apoptosis. ·

Effect of recombinant human growth hormone and interferon gamma on hepatic collagen synthesis and proliferation of hepatic stellate cells in cirrhotic rats

BACKGROUND: Fibrosis plays a key role in the development of liver cirrhosis. In this study, we investigated the effect of growth hormone and interferon gamma on hepatic collagen synthesis and the proliferation of hepatic stellate cells in a cirrhotic rat model. METHODS: Cirrhosis was induced in rats using carbon tetrachloride. Rats were simultaneously treated with daily subcutaneous injections of recombinant human growth hormone or interferon gamma combined with recombinant human growth hormone. The control group was given saline. The relative content of type I and type IV collagen was assessed by indirect immunofluorescence analysis. Activated hepatic stellate cells were prepared from cirrhotic rats. The 3-(4, 5-dimethyl-2-thiazolyl)-2, 5-diphenyl-2H-tetrazolium bromide (MTT) method was used to assess the effects of recombinant human growth hormone and interferon gamma on these cells in vitro. RESULTS: Both qualitative and quantitative analysis showed that type I and type IV collagen secretion increased with time after recombinant human growth hormone administration and was significantly higher than control and recombinant human growth hormone combined with interferon gamma administration. In vitro, recombinant human growth hormone significantly stimulated hepatic stellate cell proliferation in a concentration-dependent manner (10 -3 -10 -1 mg/100 μL), andinterferon gamma (10 -2 -10 -1 μg/100 μL) significantly inhibited their growth compared to the control group. Interferon gamma combined with recombinant human growth hormone eliminated this growth-promoting effect to a certain degree in a concentration-dependent manner (10 -1 μg/100 μL, P<0.05, 10 -2 -10 -3 μg/100 μL, P>0.05) and a time-dependent manner (P<0.05). CONCLUSIONS: Recombinant human growth hormone increased collagen secretion in cirrhotic rats in vivo and promoted the proliferation of hepatic stellate cells from cirrhotic rats in vitro. It is possible that concurrent interferon gamma therapy can offset these side-effects of recombinant human growth hormone.

Clinical and bacteriological correlates of whole blood interferon gamma(IFN-γ) in newly detected cases of pulmonary TB

Objective:To determine the relationship of the capacity to produce interferon gamma(IFN-γ) in whole blood,bacteriological,hematological,radiographic and clinical presentations in new,HIV seronegative cases of pulmonary tuberculosis(TB).Methods:80 cases and 50 control subjects aged 15 years onwards,representative of Kasturba Hospital and Nursing schools of Wardha district of Maharashtra state in India were examined for their health condition with standard methodology.Results:Among these TB patients,73.8%were Quantiferon-TB gold (QFT) positive with IFN-γconcentration as 0.35 IU or more and there was none in healthy controls.The mean IFN-γconcentrations varied between 9.58 IU(50-59 yrs) and 2.58 IU(≥60 yrs),showing no trend.The differences in positivity and mean IFN-γconcentrations were statistically insignificant.Both the QFT positivity and IFN-γconcentrations were higher in normal lymphocyte percent as compared to below and above normal,but differences were not statistically significant.Conclusions:The IFN-γconcentrations are not correlated with any of the predictors of disease severity studied,the levels are significantly higher in observation group as compared to healthy group.

Animal experiment and clinical study of effect of gamma-interferon on hepatic fibrosis

AIM To evaluate the antifibrotic effect ofdifferent doses of recombinant human Gamma-Interferon (IFN-γ) intwo rat models of hepaticfibrosis, and to observe its effect on moderatechronic hepatitis B virus fibrosis.METNODS Hepatic fibrosis was successfullyinduced in 150 and 196 rats by subcutaneousinjection of carbon tetrachloride (CCl4) andintraperitoneal injection of dimethylnitrosamine(DMN), respectively. Each of the two modeldose IFN-γ group (15 MU/kg per day, i.m. for 8group (1.67 MU/kg daily, i.m. for 8 weeks).Another group of 10 rats without any treatmentwas used as normal controls. At the end of theexperiment, semi-quantitative histopathologicalscores of inflammation and fibrosis, liver (αsmooth muscle actin (α-SMA) expression level,liver hydroxyl proline content and serumhyaluronic acid levels were compared. And 47medium chronic hepatitis B viral fibrosispatients were studied. They were given IFN-γtreatment, 100MU/day i.m. for the first threemonths and 100MU qod i.m. for the next sixmonths. Semi-quantitative pathological scoresof inflammation and fibrosis and serum hepaticfibrosis indices were compared within the 9months.RESULTS In animal experiment, thepathological fibrosis scores and liver hydroxylproline content were found to be significantlylower in rats treated with different doses of IFN-γ as compared with rats in fibrotic model groupinduced by either CCI4 or DMN, in a dose-dependent manner. For CCI4-induced model,pathological fibrosis scores in high, medium andIow doses IFN-γ groups were 5.10 ± 2.88, 7.70 ±3.53 and 8.00 ± 3.30, respectively, but the scorewas 14.60 ± 7.82 in fibrotic model group.Hydroxyl proline contents were 2.83 ± 1.18, 3.59± 1.22 and 4.80 ± 1.62, in the three IFN-γgroups, and 10.01 ± 3.23 in fibrotic model group.The difference was statistically significant(P＜0.01). Similar results were found in DMN-induced model. Pathological fibrosis scoreswere 6.30±0.48, 8.10 ±2.72 and 8.30 ±2.58, inhigh, medium and Iow doses IFN-γ groups, and12.60 ± 3.57 in fibrotic model group. Hydroxylproline contents were 2.72 ± 0.58, 3.14 ± 0.71and 3.62 ± 1.02, in the three IFN-γ groups, and12.79 ± 1.54 in fibrotic model group. Thedifference was statistically significant(P＜0.01). Serum hepatic fibrosis indicesdecreased significantly in the 47 patients afterIFN-γ treatment (HA: 433.38 ± 373.00 vs 281.57± 220.48; LN: 161.22± 41.02 vs 146.35 ± 44.67;PCⅢ: 192.59 ± 89.95 vs 156.98 ± 49.22; C-Ⅳ:156.30 ± 44.01 vs 139.14 ± 34.47) and thedifferences between the four indices weresignificant (P＜0.05). Thirty-three patientsCONCLUSION All the three doses of IFN-γ areeffective in treating rat liver fibrosis induced byeither CCl4 or DMN, the higher the dose, thebetter the effect. And IFN-γ is effective forpatients with moderate chronic hepatitis B viralfibrosis.

THE EFFECTOR FUNCTIONS OF MACROPHAGES TRANSFECTED WITH INTERFERON-GAMMA GENE MEDIATED BY RECOMBINANT ADENOVIRUS

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Effect of neuropeptide Y on white matter demyelination and serum interleukin-4 and gamma-interferon levels in the guinea pig with experimental allergic encephalomyelitis

BACKGROUND: Neuropeptide Y (NPY) may influence differentiation of Th cells. It is assumed that the immunological pathology of experimental allergic encephalomyelitis (EAE) is related to abnormal differentiation of Th cells OBJECTIVE: To investigate the effect of NPY on white matter demyelination, the serum levels interleukin-4 (IL-4) and gamma-interferon (IFN-γ), as well as EAE pathogenesis in an EAE guinea pig model following NPY injection into the lateral cerebral ventricle. DESIGN, TIME AND SETTING: A randomized controlled animal study, which was performed in the Infection Immunity Animal Laboratory, Affiliated Hospital of Luzhou Medical College, China, from October 2005 to April 2006. MATERIALS: Thirty healthy female guinea pigs of 8–12 weeks of age, and 10 healthy female rats of three months of age were used. NPY was provided by Sigma Company, USA. NPY kit was provided by Beijing Huaying Biotechnology Institute, China. METHODS: Thirty guinea pigs were randomly divided into three groups: normal control group, EAE model group, and NPY intervention group (n =10 per group). Normal control group and EAE model group: Saline (10 μL, once) was injected into the lateral cerebral ventricle. After one week, the same volume of Freund’s adjuvant complete was either injected subcutaneously into two post-palms or EAE was modeled. NPY intervention group: EAE was modeled after one week and NPY was injected (10 μL of 6 nmol NPY, once) into the lateral cerebral ventricle. Myelin basic protein (MBP) antigen made from rat spinal cord homogenate and Freund’s adjuvant complete were injected subcutaneously into both post-palms (0.2 mL per palm) to establish the EAE model. MAIN OUTCOME MEASURES: White matter demyelination of the cerebrum, cerebellum, brain stem, and spinal cord were observed by light microscopy after HE staining. Levels of serum IFN-γ and IL-4 were detected by the double antibody sandwich ABC-ELISA technique. NPY content was detected by radioimmunoassay. RESULTS: Pathological alterations in the NPY intervention groups were reduced compared to those in the EAE model group, suggesting a reduction and remission of white matter demyelination with NPY treatment. When compared to the model group, the serum IL-4 level was increased in the NPY intervention group during the high-frequent EAE stage (P < 0.01), but the serum IFN-γ level was decreased (P < 0.01). Furthermore, the EAE latency was prolonged (P < 0.01), the neurological scores were decreased in the high-frequent EAE stage (P < 0.01), and the death rate was decreased (P < 0.05). NPY content and the serum IL-4 level at the peak stage were positively correlated with those in the latent phase (r =0.863-0.900, P < 0.01), but negatively correlated with neurological scores at the peak stage (r= -0.068 to –0.863, P < 0.05–0.01). The IFN-γ level at the peak stage was negatively correlated to that in the latent phase (r = -0.683–0.650, P < 0.05), but positively correlated to neurological scores at the peak stage (r =0.975, 0.845, P < 0.05). CONCLUSION: NPY injection into the lateral cerebral ventricle can promote the secretion of IL-4, inhibit the production of IFN-γ, relieve white matter demyelination, and inhibit EAE attack in an experimental model of EAE.

Inhibitory effect of gold nanoparticles conjugated with interferon gamma and methionine on breast cancer cell line

Objective: To develop a gold nanoparticles complex conjugated with interferon-gamma(IFN-g) and methionine along with application of hyperthermia using near-infrared laser beams for the treatment of cancer cells.Methods: Gold nanorods(10 nm) were conjugated with IFN-g and methionine using carbodiimide family and characterized after purification by dialysis bags. Breast cancer cells were cultured and incubated with gold nanorods at different concentrations followed by irradiation with near-infrared laser beam. Samples were then evaluated for their viability in order to determine the effect of treatment and variables by MTT assy.Results: Zetasizer results confirmed the conjugation of gold nanorods with methionine and IFN-g. The median percentage of cell viability in 0.30 mg/m L concentration of gold nanorods was 82%. The cell viability reached to 85% at the same concentration of gold nanorods, which existed in the assayed complex. The results of MTT assay showed that the 0.60 mg/m L concentration of gold nanoparticles complex was toxic on tumor cells(P < 0.05). After exposure to hyperthermia, the viability of cells at 6 min decreased to77% in 0.30 mg/m L concentration of gold nanorods complex.Conclusions: The size and concentration of gold nanorods was not cytotoxic. However,their presence during irradiation near-infrared laser increased the number of dead cells during the treatment of cells.

肺结核患者血清IP-10、SOCS1及CA125表达意义及其与引发支气管狭窄的相关性分析

目的分析肺结核患者血清γ干扰素诱导蛋白10(IP-10)、细胞因子信号转导抑制物1(SOCS1)及糖类抗原125(CA125)表达意义及其与引发支气管狭窄的相关性。方法回顾性选择2021年1月至2023年1月河北省胸科医院收治的116例肺结核患者作为观察组,同期116名健康体检者作为对照组。根据观察组患者胸部影像学检查结果,分为重度组(n=26)和轻中度组(n=90);通过纤维支气管镜检查及活检,判断患者是否存在支气管狭窄,分为支气管狭窄组(n=42)与单纯肺结核组(n=74)。检测所有入选者血清IP-10、SOCS1及CA125水平,比较血清IP-10、SOCS1及CA125在对照组与观察组、不同严重程度的肺结核患者中的差异性;比较支气管狭窄组与单纯肺结核组第1秒用力呼气量(FEV1)、用力肺活量(FVC)、最大呼气峰流速(PEF);分析血清IP-10、SOCS1及CA125与肺结核患者肺功能相关指标及其并发支气管狭窄的相关性。采用受试者工作特征(ROC)曲线分析血清IP-10、SOCS1及CA125水平预测肺结核患者发生支气管狭窄的效能。结果观察组血清IP-10、CA125水平分别为(95.84±12.58)ng/L、(1.89±0.86)U/mL,均高于对照组[(71.25±5.63)ng/L、(0.74±0.23)U/mL],SOCS1水平为(165.32±7.95)μg/L,低于对照组[(252.54±24.71)μg/L],差异均有统计学意义(P<0.05)。重度组肺结核患者血清IP-10、CA125水平分别为(106.74±15.01)ng/L、(2.67±1.12)U/mL,均高于轻中度组[(89.72±8.16)ng/L、(1.45±0.60)U/mL],SOCS1水平为(154.12±6.07)μg/L,低于轻中度组[(200.75±15.83)μg/L],差异均有统计学意义(P<0.05)。支气管狭窄组FEV1、FVC、PEF均小于单纯肺结核组,差异均有统计学意义(P<0.05)。经Pearson相关性分析,肺结核患者FEV1、FVC、PEF与血清IP-10、CA125水平呈正相关(P<0.05),与SOCS1水平呈负相关(P<0.05)。经ROC曲线分析,血清IP-10、SOCS1联合CA125预测肺结核患者发生支气管狭窄的敏感度为89.12%,特异度为48.63%,曲线下面积为0.924。结论肺结核患者血清IP-10、CA125水平明显升高,SOCS1水平降低,与病情严重程度相关,其联合预测支气管狭窄具有较好的效能。

慢加急性乙型肝炎肝衰竭患者细菌感染病原菌分布及血清PCT、IFN-γ和IL-6水平变化分析

目的调查慢加急性乙型肝炎肝衰竭(HBV-ACLF)患者细菌感染病原菌分布特征,分析血清降钙素原(PCT)、干扰素-γ(IFN-γ)和白细胞介素-6(IL-6)水平预测细菌感染的效能。方法2019年12月~2023年1月我院收治的HBV-ACLF患者86例,常规分离和鉴定菌种,采用电化学发光免疫法检测血清PCT水平,采用ELISA法检测血清IFN-γ和IL-6水平,应用受试者工作特征(ROC)曲线评估血清指标联合预测HBV-ACLF患者发生细菌感染的效能。结果本组发生细菌感染者37例,未发生明确感染者49例;在37例HBV-ACLF并发细菌感染患者中,共检出68株感染病原菌,其中革兰氏阴性菌41株(60.3%),革兰氏阳性菌27株(39.7%);感染组血清PCT、IFN-γ和IL-6水平分别为(10.9±3.1)μg/L、(46.5±1.9)pg/mL和(16.9±1.6)pg/mL,均显著高于未感染组【分别为(0.9±0.1)μg/L、(20.1±2.4)pg/mL和(4.8±0.9)pg/mL,P<0.05】,28 d和90 d病死率分别为67.6%和75.7%,均显著高于未感染组(分别为8.2%和12.2%,P<0.05);经ROC分析显示,分别以PCT>3.3μg/L、IFN-γ>45.5 pg/mL和IL-6>15.4pg/mL为截断点,其联合预测HBV-ACLF患者并发细菌感染的曲线下面积(AUC)为0.874,诊断的灵敏度为93.6%,特异度为84.1%。结论HBV-ACLF患者细菌感染的病原菌分布具有一定的特征性,以革兰氏阴性菌感染为主,除检测血清PCT水平外,监测血清IFN-γ和IL-6水平可能有助于早期发现细菌感染而给予预防性处理,或能提供生存率。

干扰素γ和铁死亡诱导剂联用抑制口腔舌鳞状细胞癌生长的机制研究

目的:探讨干扰素γ(IFN-γ)和铁死亡诱导剂(Erastin)联用抑制口腔舌鳞状细胞癌(OTSCC)生长的机制。方法:通过生物信息学分析和免疫组化染色检测SLC7A11在OTSCC中的表达;用CRISPR-cas9技术敲除CAL-27细胞的SLC7A11基因(SLC7A11 KO),用MTT实验检测铁死亡诱导剂Erastin处理WT和SLC7A11 KO细胞后的生存率;用谷胱甘肽(GSH)试剂盒、脂质氧化(MDA)试剂盒和流式分析技术检测铁死亡诱导剂处理细胞后脂质过氧化物的变化;用IFN-γ预处理细胞24 h后,用MTT实验检测CAL-27细胞对Erastin的敏感性的变化;用IFN-γ预处理24 h后,再Erastin处理12 h,用谷胱甘肽试剂盒、脂质氧化试剂盒和流式分析技术检测细胞脂质过氧化物的变化。结果:生物信息学分析和免疫组化染色结果显示,SLC7A11在OTSCC中高表达;与WT细胞相比SLC7A11 KO CAL-27细胞对铁死亡诱导剂的敏感性增加;铁死亡诱导剂处理后SLC7A11 KO细胞的GSH含量低于WT细胞,而脂质过氧化物含量高于WT细胞;IFN-γ可以增加了细胞对铁死亡诱导剂的敏感性;IFN-γ可以降低细胞的GSH含量,增加细胞的脂质过氧化物含量。结论:IFN-γ通过下凋SLC7A11导致GSH减少,增加MDA和Lipid ROS含量,进而增加了OTSCC对铁死亡诱导剂Erastin的敏感性。

不同海拔急性髓系白血病患者化疗前后血清及骨髓造血因子表达水平差异研究

背景化疗是急性髓系白血病(AML)患者重要的治疗手段,最常见的毒副作用是骨髓抑制。各类血细胞的发育增殖、分化受到多种造血因子的调控,不同海拔AML患者化疗后造血因子表达水平是否存在差异及其变化规律尚未明确。目的探讨不同海拔AML患者化疗前后骨髓及血清造血因子表达水平是否存在差异及其变化。方法选取2021—2022年青海省人民医院血液科(中海拔地区1501~2500 m)及中国人民解放军空军军医大学西京医院血液科(低海拔地区500~1500 m)首诊初治的28例AML患者(非M3型)为研究对象,根据就诊医院海拔高低将AML患者分为中海拔组(13例)和低海拔组(15例)。采用WHO抗癌药物急性及亚急性毒性反应分级标准评估患者化疗第8、14、28天骨髓抑制分度;采用酶联免疫吸附法对两组患者化疗前、化疗第8天、化疗第28天血清及骨髓促红细胞生成素(EPO)、FMS样酪氨酸激酶3配体(Flt3-L)、促血小板生成素(TPO)和干扰素γ(IFN-γ)表达水平进行检测并比较。结果化疗第14、28天,低海拔组患者骨髓抑制分度均高于中海拔组(Z=-1.975,P=0.048;Z=-2.049,P=0.040)。化疗第28天,低海拔组血清及骨髓EPO表达水平高于中海拔组(P<0.05);中海拔组化疗第28天血清EPO表达水平低于化疗第8天(P<0.05)。化疗第28天,低海拔组血清及骨髓Flt3-L表达水平均高于中海拔组(P<0.05);两组患者化疗第8天、化疗第28天血清Flt3-L表达水平均高于化疗前,两组患者化疗第28天骨髓Flt3-L表达水平均高于化疗前(P<0.05)。化疗前、化疗第8天、化疗第28天,低海拔组血清TPO表达水平均高于中海拔组(P<0.05);低海拔组患者化疗第8天血清TPO表达水平低于化疗前(P<0.05);化疗第28天,低海拔组骨髓TPO表达水平高于中海拔组(P<0.05);中海拔组化疗第28天骨髓TPO表达水平低于化疗前(P<0.05)。两组患者化疗前后血清及骨髓IFN-γ表达水平组间、组内比较,差异均无统计学意义(P>0.05)。结论低海拔AML患者化疗后骨髓抑制恢复期间造血生长因子EPO、Flt3-L、TPO表达水平高于中海拔,造血抑制因子IFN-γ两组间无明显差异;中海拔AML患者化疗后骨髓抑制分度及程度较低海拔更严重。

中国肾移植受者结核病临床诊疗指南(2023版)

本指南旨在为肾移植受者结核病的临床管理提供全面而实用的指导。首先,概述了肾移植受者结核病的特殊性,强调了其高发生率及临床表现的多样性。为了更好地理解患者的病情,建议在移植前进行结核病相关的评估,并注意移植术后对结核病的监测。在诊断方面,详细介绍了目前常用的结核病诊断方法,并提供了在肾移植受者中的适用性评估。在确诊后,讨论了在免疫抑制药应用的背景下,如何平衡结核病治疗和排斥反应的策略,并关注了潜在的药物相互作用。预防方面,强调了在肾移植前对结核病的筛查。本指南旨在提高医务人员对肾移植受者结核病管理的认知,促进更有效的临床实践,提高受者的生活质量。

基于横断面调查的支气管哮喘中医证候客观化因素分析

目的:筛选支气管哮喘(简称哮喘)中医证候相关临床因素及生物学标志物,为中医证候客观化研究提供参考。方法:采用横断面临床调查方法,选取河南中医药大学第一附属医院呼吸科门诊及住院收治的哮喘患者390例作为研究对象,收集临床特征并检测相关血清生物标志物。SPSS 23.0建立数据库,采用单因素分析、Logistic回归分析、Spearman相关分析方法,3种方法中2种具有统计学意义的被筛选为相关因素。结果:共招募390例患者,分析资料相对完整的293例数据。外寒内饮证与年龄、哮喘控制测试(ACT)评分相关,痰浊阻肺证与性别、吸烟史、血清高迁移率族蛋白B1(HMGB1)、血清嗜酸粒细胞趋化蛋白(Eotaxin)相关,风痰阻肺证与年龄、ACT评分相关,肺气虚证与ACT评分、血清HMGB1、血清γ干扰素(IFN-γ)、血清骨膜蛋白(Periostin)相关,脾气虚证与ACT评分相关,肾气虚证与血清IFN-γ相关,肾阳虚证与血清转化生长因子-β_(2)(TGF-β_(2))、血清肿瘤坏死因子α(TNF-α)相关,肺脾气虚证与ACT评分相关,肺肾气虚证与年龄、ACT评分、病程相关,肺肾阳虚证与民族、ACT评分、血清白细胞介素-4(IL-4)具有相关性(P<0.05)。结论:血清HMGB1、Eotaxin、IFN-γ、Periostin、TGF-β_(2)、TNF-α、IL-4可能是哮喘中医证候潜在的生物标志物。性别、年龄、民族、吸烟史、病程、ACT评分与哮喘证候存在一定相关性,但研究结论有待于进一步全国多中心研究进行验证。

重组鼠IFN-γ腺病毒诱发细胞因子释放综合征小鼠模型的建立和观察

目的:通过向C57Bl/6J小鼠腹腔注射IFN-γ腺病毒(Ad-mIFN-γ)建立细胞因子释放综合征(CRS)的动物模型。方法:构建Ad-mIFN-γ及对照Ad-lacZ腺病毒载体,分别以MOI=100体外转染小鼠腹腔巨噬细胞,流式细胞术检测其对细胞mIFN-γ分泌的影响。将40只雌性C57Bl/6J小鼠按随机数字表法分为对照组、载体对照组、病毒低、中、高剂量组(每组8只),分别向各组小鼠腹腔注射PBS(200μL)、Ad-lacZ(2×10^(7)PFU/只)、Ad-mIFN-γ(5×10^(6)PFU/只)、Ad-mIFN-γ(1.5×10^(7)PFU/只)和Ad-mIFN-γ(2×10^(7)PFU/只)。每日观测小鼠的体质量及生存情况;第3天时采用流式细胞术检测小鼠外周血和脾内单核细胞(CD11b^(+))、巨噬细胞(CD11b^(+)/CD86^(+))比例,免疫荧光染色法检测脾内CD11b^(+)的单核细胞比例;第9天时采用流式细胞术检测小鼠血清中细胞因子的分泌水平;第14天,采用颈椎脱臼法处死小鼠,H-E染色法观察小鼠肝、脾、肺和肾的病理和组织学变化。结果:Ad-mIFN-γ体外感染小鼠腹腔巨噬细胞,在第3天检测到巨噬细胞分泌mIFN-γ达到峰值(118.34±2.90)pg/mL,并在一周内持续高分泌mIFN-γ,Ad-lacZ对照组IFN-γ分泌水平较低后,第3天时为(0.17±0.08)pg/mL。小鼠腹腔注射Ad-mIFN-γ后,在14 d内病毒低、中剂量组无小鼠死亡,病毒高剂量组小鼠体质量持续减轻(P<0.001);第3天,病毒高剂量组小鼠外周血和脾组织内单核细胞、巨噬细胞比例较对照组和中剂量组均显著增加(P<0.05或P<0.01);第9天,病毒低、中、高剂量组小鼠血清中mIFN-γ、IL-6、单核细胞趋化蛋白-1(MCP-1)、IL-1、TNF-α等细胞因子的水平均显著升高(P<0.001);10 d内病毒高剂量组小鼠死亡率达100%。组织病理检测可见病毒高剂量组小鼠的肝、脾、肺、肾组织有明显损伤。结论:Ad-mIFN-γ体外感染小鼠原代腹腔巨噬细胞后,可以快速分泌mIFN-γ;腹腔注射高剂量(2×10^(7)PFU/只)Ad-mIFN-γ导致小鼠出现CRS典型表现,可作为CAR-T细胞治疗诱发CRS的动物模型。