Effects of estradiol and progesterone on the proinflammatory cytokine production by mononuclear cells from patients with chronic hepatitis C

AIM:To investigate the effects of estradiol (E2) and progesterone on the unstimulated and oxidative stressstimulated production of tumor necrosis factor (TNF)-α, interleukin (IL)-1β, IL-8, and macrophage chemotactic protein (MCP)-1 by peripheral blood mononuclear cells (PBMCs) from patients with chronic hepatitis C and healthy controls. METHODS:The PBMCs were separated from agematched 72 males and 71 females with and without chronic hepatitis C, who were divided into two groups based on a mean menopausal age of 50 years. Oxidative stress was induced by hydrogen peroxide in the cells incubated in serum-free media. Cytokines in the culture supernatant were measured by an enzyme-linked immunosorbent assay. RESULTS:The highest levels of the spontaneous production of TNF-α, IL-1β, IL-8, and MCP-1 by the unstimulated PBMCs were in the older male patients with chronic hepatitis C and the lowest levels were in the premenopausal female healthy controls. E2 inhibited the cytokine production by the unstimulated PBMCs from the older male and post-menopausal female patients, which was further stimulated by progesterone. The exposure to hydrogen peroxide in the PBMCs from the younger male and pre-menopausal female healthy subjects induced the production of cytokines. The change rates of the hydrogen peroxide-stimulated cytokine production were suppressed by E2 and enhanced by progesterone. CONCLUSION:These findings suggest that E2 may play a favorable role in the course of persistent liver injury by preventing the accumulation of monocytes-macrophages and by inhibiting proinflammatory cytokine production, whereas progesterone may counteract the favorable E2 effects.

Jeju seaweeds suppress lipopolysaccharide-stimulated proinflammatory response in RAW 264.7 murine macrophages

Objective:To investigate the anti-inflammatory effects of Jeju seaweeds on macrophage RAW264.7 cells under lipopolysaccharide(LPS)stimulation.Methods:Ethyl acetate fractions were prepared from five different types of Jeju seaweeds,Dictyopteris divaricata(D.divaricata),Dictyopteris prolifera(D.prolifefa),Prioutis cornea(P.comea,Grateloupia laceolata(G,lanceolate,and Cralcloupia filicina(G.filicina)They were screened for inhibitory effects on proinflammatory mediators and cytokines such as nitric oxide(NO),prostaglandin E,,tumor necrosis factor-a(TNF-a),and interleukin-6(11.-6).Results:Our results revealed that D.divaricata,D.prolifera,P.cornea,G.lanceolata,and G.filicina potently inhibited I.PS-stimulaled NO production(IC_(50),values were 18.0,38.36,38.43,32.81 and 37.14μg/mL,respectively).Consistent with these findings,D.divtricata,D.prolifera,P.cornea,and G.fdicina also reduced the IPS-induced and prostaglandin E,production in a concentration-dependent manner.Expectedly,they suppressed the expression of inducible NO synthase and cyclooxygenase-2 at the protein level in a dose-dependent manner in the RAW264.7 cells,as detennined by western blotting.In addition,the levels of TNF-a and IL-6,released into the medium,were also reduced by D.divaricata,D.prolifera,P.cornea,G,lanceolata,and G.fdicina in a dose-dependent manner(IC_(50)values for TNF-a were 16.11,28.21,84.27,45.52 and74.75μg/mL,respectively;IC_(50),values for IL-6 were 37.35,80.08,103.28,62.53 and 84.28μg/mL,respectively).The total phlorotannin content was measured by the Folin-Ciocalteu method and expressed as phloroglucinol equivalents.The content was 92.0μg/mg for D.divaricata,151.8μg/mg for D.prolifera,57.2μg/mg for P.cornea,53.0 pg/mg for G.lanceolata,and 40.2μg/mg for G.fdicina.Conclusions:Thus,these findings suggest that Jeju seaweed extracts have potential therapeutic applications for inflammatory responses.

Aloe barbadensis Miller peptide/polypeptide fraction alleviates inflammation through inhibition of proinflammatory cytokines and mediators in vitro and in rats with Freund’s adjuvant-induced hind paw edema

Objective:To evaluate the anti-inflammatory potential of peptide/polypeptide fraction of Aloe vera through in vitro and in vivo studies.Methods:The peptide/polypeptide fraction from Aloe vera was obtained through trichloroacetic acid precipitation.The anti-inflammatory property of the peptide/polypeptide fraction was tested by protein denaturation,membrane stabilization assays.The effect of the fraction on RAW 264.7 cell viability was examined by MTT assays.The nitric oxide level was determined through Griess reagent.TNF-αand IL-6 levels were estimated using ELISA kits.In vivo studies were carried out in male Wistar rats through injection of Freund’s adjuvant in the hind paw.Paw edema was measured through the Vernier scale and levels of alanine aminotransferase,aspartate transaminase,TNF-α,IL-6,and secretory phospholipase A2 were estimated through their respective kits after fourteen days of treatment.Graph Pad Prism6 was used for analyzing the results.Results:The peptide/polypeptide extract inhibited protein denaturation with an IC50 value of(218.9±15.6)μg/m L and stabilized the membrane of red blood cells with an IC50 value of(275.9±19.1)μg/m L.The extract showed no changes in cell morphology or cytotoxicity up to the concentration of 20μg/mL in MTT assays.The peptide/polypeptide fraction markedly reduced the levels of proinflammatory markers and mediators in both in vitro and in vivo studies.Conclusions:The results indicate that the peptide/polypeptide fraction of Aloe vera has antiinflammatory property through inhibition of inflammatory markers and mediators responsible for NF-κB and mitogen-activated protein kinase pathways.

Lipid-associated membrane proteins of Mycoplasma penetrans induce production of proinflammatory cytokines in human monocytic cells

The aim of this study is to explore potential pathogenicity of Mycoplasma penetrans, and to investigate whether M. penetrans lipid-associated membrane proteins （LAMPs） could induce human monocytic cell line （THP- 1 ） to produce some proinflammatory cytokines in vitro, including interleukin- 1β （ IL- 1β）, tumor necrosis factor alpha （TNF-α）, and IL-8. THP-1 was stimulated with different concentrations of M.penetrans LAMPs and at different time to analyze the production of human IL-1β, TNF-α and IL-8. The protein levels of human IL-1β, TNF-α and IL-8 were measured by enzyme-linked immunoadsorbent assay （ELISA） and the mRNA levels of these proinflammatory cytokines were detected by reverse transcriptase-PCR （RT-PCR）. It was demonstrated in the present study that the production of IL-1β, TNF-α and IL-8 increased in dose- and time-dependent manner after stimulation with M. penetrans LAMPs in THP-1 cells. M. penetrans LAMPs also induced the expression of IL-1β, TNF-α and IL-8 mRNA. The production of IL-1β, TNF-α and IL-8 and the expression of mRNA were down-regulated by pyrrolidine dithiocarbamate （PDTC）. This study demonstrated that M. penetrans LAMPs can induce the production of proinflammatory cytokines in human monocytic cells in vitro, thus suggesting that it may be an important etiological factor.

Regulation of the expression of proinflammatory cytokines induced by SARS-CoV-2

An outbreak of a novel coronavirus was reported in Wuhan,China,in late 2019.It has spread rapidly through China and many other countries,causing a global pandemic.Since February 2020,over 28 countries/regions have reported confirmed cases.Individuals with the infection known as coronavirus disease-19(COVID-19)have similar clinical features as severe acute respiratory syndrome first encountered 17 years ago,with fever,cough,and upper airway congestion,along with high production of proinflammatory cytokines(PICs),which form a cytokine storm.PICs induced by COVID-19 include interleukin(IL)-6,IL-17,and monocyte chemoattractant protein-1.The production of cytokines is regulated by activated nuclear factor-kB and involves downstream pathways such as Janus kinase/signal transducers and activators transcription.Protein expression is also regulated by post-translational modification of chromosomal markers.Lysine residues in the peptide tails stretching out from the core of histones bind the sequence upstream of the coding portion of genomic DNA.Covalent modification,particularly methylation,activates or represses gene transcription.PICs have been reported to be induced by histone modification and stimulate exudation of hyaluronic acid,which is implicated in the occurrence of COVID-19.These findings indicate the impact of the expression of PICs on the pathogenesis and therapeutic targeting of COVID-19.

Effects of p38 MAPK inhibitor on the rat pain behavior and proinflammatory cytokines in a metastatic bone cancer pain model

Objective： To observe the effects of p38 mitogen activated protein kinase （MAPK） inhibitor SB203580 by intrathecal injection on the pain behavior and the spinal proinflammatory cytokines in a rat model of bone cancer pain induced by breast cancer cells. Methods： Eleven rats were used to establish the models of bone cancer pain, six rats were treated by intrathecal SB203580 injection, and the other 5 were as the controls. The paw withdrawal latency （PWL）, histology and the spinal levels of IL-1β and TNF-α were detected. Results： All the 11 rats presented evident bone destruction and thermal hyperalgesia after intra-tibial injection of breast cancer cells. No effect of SB203580 on the bone destruction was observed. However, following intrathecal injection of SB203580, the left PWLs （12.12± 1.26 s at 16 days and 12.99 ± 1.65 s at 19 days） were significant higher than that of controls （9.05 ± 1.08 s at 16 days and 8.55 ± 1.60 s at 19 days）, P 〈 0.05. Meanwhile, inkathecal injection of SB203580 evidently reduced the levels of spinal IL-1β and TNF-α. Conclusion： Intrathecal injection of SB203580 in a rat model of bone cancer pain cannot prevent the tibial destruction but significantly depress the thermalgia sensitivity, which might result from inhibiting inkacellular p38 MAPK signaling transduction, and thereby reducing the release of the proinflammatory cytokines.

The Diagnostic Value of the Investigation of the Proinflammatory and Anti-inflammatory Cytokines Levels in the Immune System of Patients with Breast Cancer

Diagnostic value of serumal levels of proinflammatory(TNF-α,IL-1β,IL-6 and IFN-γ) and anti-inflammatory(IL-4 and IL-10) cytokines of immune system is investigated at 54 mammary glands sick by a cancer.The analysis carried out has allowed to tap the raised concentration of such proinflammatory cytokines,as IL-1β,TNF-α and IL-6 in serum of peripheric blood of MGC patients.The analysis of antiinflammatory cytokines in Serum of peripheric blood of MGC patients also has taped authentically raised value of IL-4 and IL-10.The obtained data testify to presence imbalance cellular and humoral factors of the immune system which studying will serve as the important diagnostic criterion of breast cancer.

Changes of proinflammatory, fluid balance, vascular permeability and oxidative stress in patients with secretory otitis media

Objective: To investigate the changes of proinflammatory, fluid balance, vascular permeability and oxidative stress in patients with secretory otitis media. Methods: A total of 42 patients with secretory otitis media treated in our hospital from September 2016 to January 2018 were selected as the observation group and 42 healthy people as the control group. The levels of proinflammatory effect [including transforming growth factor beta 1 (TGF-β1), transforming growth factor-beta 2 (TGF-β2)], fluid balance [including aquaporin-1 (AQP-1) and aquaporin-4 (AQP-4)], vascular permeability [including hyaluronic acid (HA), fibronectin (Fn) and platelet activating factor (PAF)] and oxidative stress-related indexes [including malondialdehyde (MDA) and superoxide dismutase (SOD)] were observed and compared between the two groups. Results: The levels of AQP-1, AQP-4 and Fn in the observation group were significantly lower than those in the control group. The expression levels were (4.52±0.39) g/L, (23.06±7.21) g/L and (120.59±13.07) mg/L, respectively. The levels of TGF-β1, TGF-β2, HA, PAF, MDA and SOD were significantly higher than those of the control group and the expression levels were (11.99±4.23) 毺g/L, (4.22±1.66) 毺g/L, (70.54±6.99) 毺g/L, (123.83±20.58) ng/mL, (6.30±0.44) nmol/mL and (15.85±0.78) NU/mL, respectively. The difference was statistically significant. Conclusions: Inflammatory reaction occurs in patients with otitis media with secretory otitis media. It is easy to break the liquid balance in the middle ear cavity and to increase vascular permeability and oxidative stress. The relevant indicators should be strengthened in clinical practice, so as to provide evidence for early diagnosis and treatment of the disease.

Emodin suppresses LPS-induced proinflammatory responses and nuclear factor-B activation by disruption of lipid rafts and TLR-4 recruitment in endothelial cells

Emodin [1,3,8-Trihydroxy-6-methylanthraquinone] has been reported to exhibit vascular anti-inflammatory properties.However,the relevant anti-inflammatory mechanisms are not well understood.The present study was design to explore the molecular target(s) of emodin

司美格鲁肽注射液对早期2型糖尿病肾病患者肾功能及促炎因子的影响

目的:探讨司美格鲁肽注射液对早期2型糖尿病肾病(T2DN)患者肾功能及促炎因子的影响。方法:选取2021年9月—2022年3月南阳市第一人民医院就诊的120例早期T2DN患者作为研究对象,按照随机数表法将分为对照组与观察组,每组各60例。对照组患者给予常规治疗,观察组患者给予司美格鲁肽注射液治疗,均连续治疗12周。比较两组患者空腹血糖(FBG)、糖化血红蛋白(HbAlc)、肾功能指标[血尿素氮(BUN)、血肌酐(Cr)、尿白蛋白肌酐比值(UACR)]及促炎因子[白细胞介素-6 (IL-6)、肿瘤坏死因子-α (TNF-α)]。结果:治疗后,两组患者FBG、HbAlc水平均较治疗前明显降低,且观察组明显低于对照组,差异有统计学意义(t=3.162、3.046,P<0.05);治疗后,两组患者Cr、UACR水平均较治疗前明显降低,且观察组明显低于对照组,差异有统计学意义(t=5.261、8.426,P<0.05);治疗后,两组患者血清IL-6、TNF-α水平均较治疗前明显降低,且观察组明显低于对照组,差异有统计学意义(t=3.357、3.814,P<0.05)。结论:司美格鲁肽注射液能有效控制早期T2DN患者的血糖水平,改善肾功能,降低促炎因子水平。

加减升陷汤治疗非小细胞肺癌合并癌因性疲乏患者疗效及对促炎性相关因子的影响

目的探讨加减升陷汤治疗非小细胞肺癌合并癌因性疲乏患者疗效及对促炎性相关因子的影响。方法选取2023年5月-2024年5月中国中医科学院广安门医院南区收治的非小细胞肺癌合并癌因性疲乏患者80例,根据随机数字表法分为观察组和对照组,每组40例,对照组采用化疗治疗,观察组患者在对照组基础上加用加减升陷汤治疗,两组患者均持续治疗2个月。比较两组患者的临床疗效,并对两组患者治疗前后Piper疲乏量表评分、促炎性细胞因子水平进行比较,观察两组患者不良反应发生情况。结果观察组患者癌因性疲乏治疗总有效率(95.00%)明显高于对照组(72.50%)(χ^(2)=7.440,P<0.05)。治疗前两组患者Piper疲乏量表评分、促炎性细胞因子水平无明显差异(P>0.05);治疗后观察组患者认知评分、躯体评分、情感评分和行为评分改善程度均优于对照组(P<0.05)。治疗后观察组患者白细胞介素-6(Interleukin 6,IL-6)、肿瘤坏死因子(Tumor Necrosis Factor-α,TNF-α)和血清C反应蛋白(C-reactive protein,CRP)水平均明显低于对照组(P<0.05)。观察组患者不良反应发生率(7.50%)明显低于对照组(30.00%),差异有统计学意义(χ^(2)=6.646,P<0.05)。结论加减升陷汤治疗非小细胞肺癌合并癌因性疲乏患者有一定疗效,可明显改善患者疲乏状态,降低炎症反应,减轻不良反应。

霍山黄芽提取物对棕榈酸诱导下细胞脂质积累和炎症反应的影响

本研究比较分析了4个不同等级(特一级、特二级、一级、二级)霍山黄芽的主要生化成分和抗氧化活性差异,并选取特一级霍山黄芽,基于棕榈酸诱导的小鼠正常肝细胞AML-12(alpha mouse liver 12)、小鼠神经小胶质细胞BV-2、人肾皮质近曲小管上皮细胞HK-2(human kidney-2)、人胃腺癌细胞(human gastric adenocarcinoma,AGS)细胞模型,研究霍山黄芽提取物(Huoshanhuangya tea extract, HTE)对脂质积累和促炎细胞因子的影响。结果表明:特一级霍山黄芽的可溶性糖质量分数最低,咖啡碱质量分数、儿茶素类质量分数与游离氨基酸总量最高,且抗氧化活性最强;一定质量浓度的HTE处理后,棕榈酸诱导的AML-12、BV-2、HK-2、AGS细胞的细胞活力显著增加,棕榈酸诱导的脂质积累得到改善,棕榈酸诱导的AML-12、BV-2、HK-2细胞中肿瘤坏死因子-α(tumor necrosis factor-α, TNF-α)的释放水平明显降低。进一步探究其作用机制发现,HTE使BV-2细胞中炎症信号通路Toll样受体4(Toll-like receptor 4, TLR4)和核因子-κB RelA(nuclear factor-κB RelA, NF-κB p65)基因的表达下调,表明其可能通过抑制TLR4/NF-κB信号通路的活化来缓解棕榈酸诱导的BV-2细胞炎症损伤。

Antidepressant effects of Yuanzhi (Polygalae Radix) extract on chronic unpredictable mild stress-induced depression in rats: modulation of the NLRP3 inflammasome and NF-κB pathway

Objective To investigate the antidepressant effects of Yuanzhi(Polygalae Radix;PR)aqueous extract on chronic unpredictable mild stress(CUMS)-induced depression rat models and the underlying mechanisms.Methods A total of 40 male Sprague Dawley(SD)rats were randomly divided into control;model;low dose of PR(PR-L;0.5 g/kg);high dose of PR(PR-H;1 g/kg);and fluoxetine(10 mg/kg)groups;with 8 rats in each group.Except for the rats in control group;those in the other four groups underwent CUMS-induced depression modeling.PR and fluoxetine were administered intragastrically once daily;30 min prior to the CUMS procedure;for 14 consecu-tive days until the behavioral tests were performed.After CUMS modeling;the sucrose prefer-ence test(SPT);open field test(OFT);novelty-suppressed feeding test(NSFT);forced swim test(FST);and tail suspension test(TST)were employed to assess the pharmacological ef-fects of PR on the mitigation of depressive-like behaviors in rat models.Additionally;the en-zyme-linked immunosorbent assay(ELISA)was utilized to quantify the serum levels of tumor necrosis factor(TNF)-α;interleukin(IL)-6;and IL-1βin the rats.Western blot analysis was al-so conducted to evaluate the protein expression levels of nuclear factor kappa-B(NF-κB);in-ducible nitric oxide synthase(iNOS);cyclooxygenase-2(COX-2);nucleotide-binding oligomerization domain(NOD)-like receptor family pyrin domain containing 3(NLRP3);apoptosis-associated speck-like protein containing caspase recruitment domain(ASC);and caspase-1 in the hippocampal tissues of the rats.Immunofluorescence staining was per-formed to observe the morphological changes in ionized calcium-binding adapter molecule 1 positive(Iba-1+)cells in the dentate gyrus(DG)of rats with CUMS-induced depression.Results(i)Treatment with PR-H and fluoxetine resulted in significant enhancements in both the total distance and time the rats moved during tests(P<0.01 and P<0.05;respectively).Post-administration of PR-H and fluoxetine also led to statistically significant increase in su-crose preference among rats(P<0.05).Besides;PR-L;PR-H;and fluoxetine treatment markedly decreased the latency of ingestion(P<0.05;P<0.05;and P<0.01;respectively).As observed from the FST;PR-L;PR-H;and fluoxetine presented antidepressant effects on rats with CUMS-induced depression;leading to the reduction in time of their immobility(P<0.05;P<0.01;and P<0.01;respectively).The results of TST indicated reduced immobility time in rats receiving PR-H and fluoxetine treatment as well(P<0.01).(ii)Rats in model group showed an increase in the levels of Iba-1+microglia in their left and right brains in compari-son with control group(P<0.01).However;such increase was negated post PR treatment(P<0.01).Treatment with PR-L;PR-H;and fluoxetine considerably reduced the levels of inflam-matory factors(TNF-α;IL-1β;and IL-6;P<0.01).In addition;treatment of PR-L and PR-H ef-fectively counteracted the elevated levels of NLRP3;ASC;and caspase-1;and markedly down-regulated the expression levels of phosphorylated p65(p-p65);COX-2;and iNOS in rats’hip-pocampus(P<0.01).Conclusion Collectively;these findings indicate that PR exerts an antidepressant effect on rats with CUMS-induced depression partially through the modulation of the NLRP3 and NF-κB signaling pathways.

盐酸左沙丁胺醇雾化联合糖皮质激素治疗急性加重期慢性阻塞性肺疾病临床效果研究

目的盐酸左沙丁胺醇雾化联合糖皮质激素治疗急性加重期慢性阻塞性肺疾病(AECOPD)的临床效果。方法选取自2020年8月至2023年7月界首市人民医院收治的50例AECOPD患者为研究对象,根据用药方式分成激素组和联合组,每组25例。激素组采用注射用甲泼尼龙琥珀酸钠治疗,联合组在基于激素组治疗方式的基础上,加入盐酸左沙丁胺醇雾化治疗。比较两组的治疗总有效率、用药前后疾病严重程度、促炎因子水平、血气指标、血常规、呼吸动力学和肺通气功能,另将两组药物不良反应发生率。结果治疗后,联合组的治疗总有效率高于激素组,不良反应发生率低于激素组,差异有统计学意义(P<0.05)。治疗后,两组急性生理与慢性健康Ⅱ评分、临床慢性肺部阻塞症调查问卷评分、C反应蛋白、降钙素原、白细胞介素-6、丙二醛、动脉二氧化碳分压、平均气道压、气道阻力水平下降,谷胱甘肽过氧化物酶、超氧化物歧化酶、动脉血氧分压、血氧饱和度、吸气峰值压、用力肺活量、第一秒用力呼气容积、呼吸峰值流速上升水平均升高,联合组变化更为显著,差异均有统计学意义(P<0.05)。结论盐酸左沙丁胺醇雾化结合糖皮质激素可有效治疗AECOPD,降低疾病严重程度,对机体炎症状态、血气指标与呼吸动力学指标均有改善作用,可提高肺通气功能,不良反应少,安全性高。

构树花粗多糖对紫外线诱导小鼠皮肤光损伤的保护作用及机制研究

研究构树花粗多糖对紫外线诱导小鼠皮肤光损伤的保护作用,并探讨其作用机制。采用雌性昆明鼠建立长波紫外线(UVA)诱导小鼠皮肤光损伤模型,并对小鼠背部皮肤进行评分。采用苏木素-伊红(HE)、Masson染色考察小鼠皮肤组织病理学变化、皮肤厚度和胶原纤维的变化;考察皮肤组织Hyp、抗氧化酶SOD、GSH-Px、CAT和MDA,TNF-α、IL-1β、IL-6的含量,MMPs、Nrf2、HO-1和NF-κB通路相关蛋白的表达。结果显示,构树花粗多糖凝胶可不同程度改善皮肤粗糙溃烂现象,抑制皮肤增厚,提高真皮层胶原含量,使胶原纤维排列趋于紧密;提高皮肤组织中SOD、GSH-Px和CAT活力,降低MDA含量(P<0.05);降低皮肤促炎因子TNF-α、IL-1β和IL-6含量(P<0.05);MMP-1和MMP-3含量明显降低(P<0.05),Nrf2蛋白和HO-1蛋白表达显著升高(P<0.01),p-p65/p65蛋白表达比例显著降低(P<0.05)。可见,构树花粗多糖对紫外线致小鼠皮肤光损伤具有显著的保护作用,其机制可能与构树花粗多糖激活Nrf2通路、增强SOD等抗氧化酶活性,抑制NF-κB通路有关。

由mtDNA清除THP-1细胞构建的人单核/巨噬细胞系Rho0细胞周期、凋亡、吞噬功能、炎症因子表达变化

目的 观察由线粒体DNA(mtDNA)清除人单核细胞白血病细胞(THP-1细胞)构建的人单核/巨噬细胞系Rho0细胞周期、凋亡、吞噬功能、炎症因子表达变化。方法 取THP-1细胞,使用溴化乙锭(EB)清除细胞中mtDNA,构建新的人单核/巨噬细胞Rho0。取Rho0细胞,分别给予1 mg/mL LPS或溶媒刺激24 h(计为Rho0-LPS组、Rho0-溶媒组);另取未经EB处理的THP-1细胞,分别给予1 mg/mL LPS或溶媒刺激24 h(计为Control-LPS组、Control-溶媒组);采用流式细胞术PI染色检测各组细胞周期,流式细胞术Annexin V-FITC/PI法测算各组凋亡细胞数,Red-Zymosan染料吞噬实验评估各组细胞吞噬功能(平均荧光强度)。取Rho0细胞(Rho0组)和取未经EB处理的THP-1细胞(Control组),采用RT-qPCR法检测炎症因子(IL-1α、IL-1β、TNF-α、IL-6、IL-8、IL-10、IL-12 mRNA)。结果 与Control-溶媒组比较,Rho0-溶媒组G0~G1期、S期、G2/M期比例降低及细胞凋亡数增加和平均荧光强度增强,Control-LPS组细胞凋亡数增加和平均荧光强度增强(P均<0.05);与Rho0-溶媒组比较,Rho0-LPS组G0~G1期比例降低及细胞凋亡数增加(P均<0.05)。与Control组比较,Rho0组IL-1β、TNF-α、IL-8、IL-10 mRNA表达升高(P均<0.05)。结论 清除mtDNA可导致Rho0细胞周期停滞,促进细胞凋亡,增强细胞吞噬功能及促炎功能。

开颅术后颅内感染患者脑脊液促炎性细胞因子及血脑屏障破坏程度与预后的关系分析

目的:分析开颅术后颅内感染患者脑脊液促炎性细胞因子及血脑屏障破坏程度与预后的关系。方法:回顾性分析2019年6月—2023年6月于宜春市人民医院实施开颅术后发生颅内感染的60例患者的临床资料。所有患者均检测脑脊液促炎性细胞因子[高迁移率族蛋白B-1(HMGB-1)、巨噬细胞炎症蛋白-1α(MIP-1α)、γ干扰素(IFN-γ)、白细胞介素-6(IL-6)]和血脑屏障破坏程度[脑脊液白蛋白/血清白蛋白比值]。根据预后情况[格拉斯哥昏迷量表(GCS)评分]将患者分为预后良好组(GCS评分>8分,n=24)和预后不良组(GCS评分≤8分,n=36),比较两组脑脊液HMGB-1、MIP-1α、IFN-γ、IL-6水平和脑脊液白蛋白/血清白蛋白比值,使用Pearson相关系数分析脑脊液促炎性细胞因子、血脑屏障破坏程度与预后的相关性。以受试者操作特征(ROC)曲线分析脑脊液促炎性细胞因子联合血脑屏障破坏程度预测开颅术后颅内感染患者预后情况的价值。结果:预后不良组脑脊液HMGB-1、MIP-1α、IFN-γ、IL-6水平和脑脊液白蛋白/血清白蛋白比值均显著高于预后良好组,差异均有统计学意义(P<0.05)。Pearson相关系数分析结果显示,脑脊液HMGB-1、MIP-1α、IFN-γ、IL-6水平和脑脊液白蛋白/血清白蛋白比值与开颅术后颅内感染患者GCS评分均呈负相关(P<0.05)。ROC曲线中,脑脊液HMGB-1、MIP-1α、IFN-γ、IL-6水平联合脑脊液白蛋白/血清白蛋白比值预测开颅术后颅内感染患者预后情况的曲线下面积(AUC)为0.977,敏感度为94.44%,特异度为92.50%。结论:开颅术后颅内感染患者脑脊液促炎性细胞因子及血脑屏障破坏程度与预后密切相关,临床可通过检测其水平,预测患者预后。

脐带间充质干细胞来源外泌体对大鼠放射性肺损伤作用及机制研究

目的探讨人脐带间充质干细胞来源外泌体(hUCMSC-Exo)对大鼠放射性肺损伤(RILI)的作用及机制。方法流式细胞术检测人脐带间充质干细胞(hUC-MSC)表面标志物;蛋白免疫印迹法、纳米粒子跟踪分析及透射电子显微镜鉴定hUCMSC-Exo。根据随机数字表法将15只健康SD大鼠分为对照组、照射组和照射+Exo组,每组各5只,照射+Exo组大鼠在辐照后立即注射100μl的hUCMSC-Exo(剂量为1×10^(7)个/μl),其余两组注射100μl生理盐水,照射后4周处死大鼠并取材;苏木精-伊红(HE)和Masson染色法观察肺组织病理学变化;酶联免疫吸附法(ELISA)检测大鼠血清中白细胞介素1β(IL-1β)、白细胞介素6(IL-6)、肿瘤坏死因子α(TNF-α)和干扰素γ(INF-γ)表达;蛋白免疫印迹法检测大鼠右肺组织中E-钙黏蛋白(E-cadherin)、波形蛋白(vimentin)、转化生长因子-β1(TGF-β1)和IL-1β蛋白表达;实时荧光定量聚合酶链式反应(PCR)检测E-cadherin、Vimentin、IL-1β和IL-6的mRNA表达;免疫组织化学染色检测大鼠右肺组织中E-cadherin、Vimentin、TGF-β1和磷酸化Smad同源物(p-Smad)蛋白表达。结果与照射组相比较,照射+Exo组炎性细胞浸润减少,胶原沉积和纤维组织增生减少(P<0.05);血清中促炎因子IL-1β、IL-6、TNF-α及INF-γ表达减少(P<0.05);肺组织中E-cadherin蛋白表达增加,Vimentin、TGF-β1、p-Smad和IL-1β蛋白表达减少(P<0.05);肺组织中E-cadherin的mRNA表达增加,Vimentin、IL-1β及IL-6的mRNA表达减少(P<0.05)。结论hUCMSC-Exo能够通过减少促炎因子分泌及抑制纤维化进展缓解RILI。

乌司他丁对腹腔镜直肠癌手术围术期炎性反应的影响

目的探讨乌司他丁对腹腔镜直肠癌手术围术期炎性反应的影响。方法择期全麻下行腹腔镜直肠癌根治术(骶前吻合)患者60例,年龄40～60岁,体重50～70kg。患者随机分为两组,每组30例。乌司他丁组(U组)将乌司他丁2.5kU/kg用生理盐水50ml稀释,入室后缓慢静注(10min),另2.5kU/kg加入250ml生理盐水中滴注(从入室开始1h滴完)。对照组(C组)用等量生理盐水以同样方法输注。采用放射免疫法测定静脉血IL-6、IL-8和TNF-α浓度;用ELISA法测定血清中C反应蛋白(CRP)浓度;用ELISA试剂盒测定血清肠型脂肪酸结合蛋白(I-FABP)浓度。结果与气腹前比较,气腹消除后10min、6h及术后24、48h两组患者IL-6、IL-8、TNF-α、CRP浓度明显升高(P<0.05或P<0.01),且C组明显高于U组(P<0.05);两组I-FABP浓度在气腹消除后10min和6h均明显升高(P<0.05或P<0.01),且C组明显高于U组(P<0.05),C组在术后24h仍明显高于U组(P<0.05)。结论乌司他丁用于腹腔镜直肠癌手术可以减轻气腹期间促炎性细胞因子的生成和释放,对肠黏膜有一定的保护作用。