C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 pathway as a therapeutic target and regulatory mechanism for spinal cord injury

Spinal cord injury involves non-reversible damage to the central nervous system that is characterized by limited regenerative capacity and secondary inflammatory damage.The expression of the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis exhibits significant differences before and after injury.Recent studies have revealed that the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis is closely associated with secondary inflammatory responses and the recruitment of immune cells following spinal cord injury,suggesting that this axis is a novel target and regulatory control point for treatment.This review comprehensively examines the therapeutic strategies targeting the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis,along with the regenerative and repair mechanisms linking the axis to spinal cord injury.Additionally,we summarize the upstream and downstream inflammatory signaling pathways associated with spinal cord injury and the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis.This review primarily elaborates on therapeutic strategies that target the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis and the latest progress of research on antagonistic drugs,along with the approaches used to exploit new therapeutic targets within the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis and the development of targeted drugs.Nevertheless,there are presently no clinical studies relating to spinal cord injury that are focusing on the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis.This review aims to provide new ideas and therapeutic strategies for the future treatment of spinal cord injury.

Blocking postsynaptic density-93 binding to C-X3-C motif chemokine ligand 1 promotes microglial phenotypic transformation during acute ischemic stroke

We previously reported that postsynaptic density-93 mediates neuron-microglia crosstalk by interacting with amino acids 357–395 of C-X3-C motif chemokine ligand 1(CX3 CL1) to induce microglia polarization. More importantly, the peptide Tat-CX3 CL1(comprising amino acids 357–395 of CX3 CL1) disrupts the interaction between postsynaptic density-93 and CX3 CL1, reducing neurological impairment and exerting a protective effect in the context of acute ischemic stroke. However, the mechanism underlying these effects remains unclear. In the current study, we found that the pro-inflammatory M1 phenotype increased and the anti-inflammatory M2 phenotype decreased at different time points. The M1 phenotype increased at 6 hours after stroke and peaked at 24 hours after perfusion, whereas the M2 phenotype decreased at 6 and 24 hours following reperfusion. We found that the peptide Tat-CX3 CL1(357–395 aa) facilitates microglial polarization from M1 to M2 by reducing the production of soluble CX3 CL1. Furthermore, the a disintegrin and metalloprotease domain 17(ADAM17) inhibitor GW280264 x, which inhibits metalloprotease activity and prevents CX3 CL1 from being sheared into its soluble form, facilitated microglial polarization from M1 to M2 by inhibiting soluble CX3 CL1 formation. Additionally, Tat-CX3 CL1(357–395 aa) attenuated long-term cognitive deficits and improved white matter integrity as determined by the Morris water maze test at 31–34 days following surgery and immunofluorescence staining at 35 days after stroke, respectively. In conclusion, Tat-CX3 CL1(357–395 aa) facilitates functional recovery after ischemic stroke by promoting microglial polarization from M1 to M2. Therefore, the Tat-CX3 CL1(357–395 aa) is a potential therapeutic agent for ischemic stroke.

C–C motif chemokine ligand 16 inhibits the progression of liver cirrhosis via inactivating hepatic stellate cells

Background:Liver cirrhosis results from many forms of chronic damage,characterized by accumulation of extracellular matrix.The present study aimed to explore a potential non-invasive biomarker and its mechanism in the progression of liver cirrhosis.Methods:Gene Expression Omnibus(GEO)dataset(GSE15654,n=216)was analyzed to screen genes associated with progression of liver cirrhosis.A total of 181 plasma samples,including healthy control(HC,n=20),chronic hepatitis B(CHB,n=77)and HBV-related liver cirrhosis(LC,n=84),were enrolled for validation.In vitro and in vivo experiments were employed for the mechanistic investigation.Results:GEO dataset analysis showed that relatively low mRNA-expression of C–C motif chemokine ligand 16(CCL16)was associated with elevated Child-Pugh score(P=0.034)and worse prognosis(P=0.025).Plasma CCL16 level decreased in a stepwise pattern,with a median concentration of 10.29,6.57 and 4.47 ng/mL in the HC,CHB and LC groups,respectively(P<0.001).Low plasma CCL16 was significantly related to hepatic dysfunction both in the CHB and LC groups(P<0.05).Combination of CCL16 and ALT showed improved distinguishing capability for LC compared to either alone.In vitro,CCL16 expression was downregulated by lipopolysaccharide and hypoxia.Overexpression of CCL16 from human normal liver cell line(LO2)reduced the extracellular matrix associated proteins(Col1 and Col4)in human hepatic stellate cell line(LX-2).In vivo,the pathological feature of cirrhosis was alleviated by the hepatocytespecific expression of CCL16.Conclusions:CCL16 could be a feasible plasma marker to predict the occurrence and progression of liver cirrhosis.CCL16 might impact liver cirrhosis through inactivating hepatic stellate cells.

Macrophage migration inhibitory factor facilitates astrocytic production of the CCL2 chemokine following spinal cord injury

Spinal cord injury causes accumulation of a large number of leukocytes at the lesion site where they contribute to excessive inflammation.Overproduced chemokines are responsible for the migratory process of the leukocytes,but the regulatory mechanism underlying the production of chemokines from resident cells of the spinal cord has not been fully elucidated.We examined the protein levels of macrophage migration inhibitory factor and chemokine C-C motif chemokine ligand 2 in a spinal cord contusion model at different time points following spinal cord injury.The elevation of macrophage migration inhibitory factor at the lesion site coincided with the increase of chemokine C-C motif chemokine ligand 2 abundance in astrocytes.Stimulation of primary cultured astrocytes with different concentrations of macrophage migration inhibitory factor recombinant protein induced chemokine C-C motif chemokine ligand 2 production from the cells,and the macrophage migration inhibitory factor inhibitor 4-iodo-6-phenylpyrimidine attenuated the stimulatory effect.Further investigation into the underlying mechanism on macrophage migration inhibitory factor-mediated astrocytic production of chemokine C-C motif chemokine ligand 2 revealed that macrophage migration inhibitory factor activated intracellular JNK signaling through binding with CD74 receptor.Administration of the macrophage migration inhibitory factor inhibitor 4-iodo-6-phenylpyrimidine following spinal cord injury resulted in the reduction of chemokine C-C motif chemokine ligand 2-recruited microglia/macrophages at the lesion site and remarkably improved the hindlimb locomotor function of rats.Our results have provided insights into the functions of astrocyte-activated chemokines in the recruitment of leukocytes and may be beneficial to develop interventions targeting chemokine C-C motif chemokine ligand 2 for neuroinflammation after spinal cord injury.

前列腺癌相关成纤维细胞通过分泌趋化因子C-C基元配体15促进单核细胞迁移

目的:探究前列腺癌微环境中趋化因子C-C基元配体15(CCL15)的表达、来源以及对单核细胞迁移能力的影响。方法:对正常前列腺组织和前列腺癌组织进行CCL15免疫荧光染色,使用免疫组化和免疫荧光双染实验探究CCL15的主要来源细胞。从新鲜的正常前列腺组织和前列腺癌组织中分离成纤维细胞并进行原代培养,通过实时定量PCR、免疫印迹实验和ELISA实验检测成纤维细胞中α-平滑肌肌动蛋白(α-SMA)、成纤维细胞活化蛋白(FAP)、波形蛋白(Vimentin)和CCL15的表达情况。利用慢病毒转染敲低CCL15,探究敲低CCL15后成纤维细胞条件培养基对单核细胞迁移能力的影响。进行多色免疫荧光染色检测前列腺癌组织中CCL15与M2巨噬细胞的位置关系。结果:前列腺癌组织中CCL15的表达明显高于正常组织,且主要来源于表达α-SMA的成纤维细胞。与前列腺正常成纤维细胞(NF)相比,前列腺癌相关成纤维细胞(CAF)分泌CCL15的能力显著增强。敲低CCL15后,前列腺CAF分泌的CCL15明显减少,减弱了单核细胞的迁移能力。在前列腺癌组织中,CCL15高表达区域存在更多M2巨噬细胞。结论:前列腺CAF通过分泌CCL15促进单核细胞迁移,增加前列腺癌微环境中M2巨噬细胞的浸润。

The prognostic value of C-X-C motif chemokine receptor 4 in patients with sporadic malignant peripheral nerve sheath tumors

Background: Recent studies indicate that C-X-C motif chemokine receptor 4(CXCR4) and its ligand, C-X-C motif chemokine ligand 12(CXCL12), stimulate expression of the cell cycle regulatory protein Cyclin D1 in neurofibromatosis 1-associated malignant peripheral nerve sheath tumor(MPNST) cells and promote their proliferation. In this study, we measured the expression of CXCR4, CXCL12, and Cyclin D1 proteins in sporadic MPNST tissues from Chinese patients and investigated their prognostic values.Methods: CXCR4, CXCL12, and Cyclin D1 protein expression in samples from 58 Chinese patients with sporadic MPNST was assessed with immunohistochemical staining.Their prognostic values were evaluated with Kaplan-Meier analysis and a log-rank test. Multivariate Cox regression analysis was used to identify independent prognostic factors.Results: High expression of CXCR4, CXCL12, and Cyclin D1 was observed in 19(32.8%), 32(55.2%), and 16(27.6%)samples, respectively. CXCR4 expression was positively correlated with CXCL12 expression(r = 0.334, P = 0.010) and Cyclin D1 expression(r = 0.309, P = 0.018). Patients with high CXCR4 expression showed longer overall survival than those with low CXCR4 expression(χ~2 = 4.642, P = 0.031).Conclusion: High CXCR4 expression may define a specific subtype of sporadic MPNST with favorable prognosis.

C-C基序趋化因子配体14的研究进展

C-C基序趋化因子配体14(CCL14)是一类趋化细胞定向移动的小分子蛋白质,可能参与多种疾病(包括肿瘤、免疫相关疾病、脓毒症、急性肾损伤)的发生发展。本文对近几年CCL14的研究进展进行了综述。

血清CX3CL1、CCL17与类风湿关节炎相关间质性肺疾病患者肺功能及预后的关系研究

目的分析血清C-X3-C基序趋化因子配体1(CX3CL1)、C-C基序趋化因子配体17(CCL17)与类风湿关节炎相关间质性肺疾病(RA-ILD)患者肺功能及预后的关系。方法选取2017年1月—2018年1月上海中医药大学附属龙华医院风湿科收治RA患者295例,根据是否合并ILD分为ILD组115例和非ILD组180例,根据预后情况将RA-ILD患者分为预后不良亚组和预后良好亚组。检测血清CX3CL1、CCL17水平及肺功能指标[第1秒用力呼气容积(FEV_(1))、用力肺活量(FVC)、FEV_(1)/FVC和肺一氧化碳弥散量(DLCO)]。采用Pearson相关性分析RA-ILD患者血清CX3CL1、CCL17水平与肺功能指标的相关性,多因素Logistic回归分析RA-ILD患者预后不良的影响因素,受试者工作特征(ROC)曲线分析血清CX3CL1、CCL17水平预测RA-ILD患者预后不良的价值。结果与非ILD组比较,ILD组血清CX3CL1、CCL17水平升高,FEV_(1)、FVC、FEV_(1)/FVC、DLCO降低(t/P=14.359/<0.001、13.855/<0.001、12.015/<0.001、2.732/0.007、14.749/<0.001、14.010/<0.001)。Pearson相关性分析显示,RA-ILD患者血清CX3CL1、CCL17水平与FEV_(1)、FVC、FEV_(1)/FVC、DLCO呈负相关(r=-0.762、-0.711、-0.577、-0.534、-0.707、-0.692、-0.735、-0.672,P均<0.001)。随访5年,115例RA-ILD患者预后不良发生率为46.96%。多因素Logistic回归分析显示,普通型间质性肺炎和高分辨率电子计算机断层扫描(HRCT)评分、CX3CL1、CCL17升高为RA-ILD患者预后不良的独立危险因素[OR(95%CI)=3.745(1.245~11.264)、1.051(1.008~1.095)、1.008(1.003~1.012)、1.037(1.012~1.062)],FEV_(1)、FEV_(1)/FVC、DLCO升高为独立保护因素[OR(95%CI)=0.952(0.896~0.988)、0.892(0.867~0.981)、0.857(0.789~0.949)]。ROC曲线分析显示,血清CX3CL1、CCL17水平联合预测RA-ILD患者预后不良的曲线下面积为0.875,大于CX3CL1、CCL17单独预测的0.783、0.788(Z=2.807、2.698,P=0.005、0.007)。结论RA-ILD患者血清CX3CL1、CCL17水平升高,与肺功能降低和预后不良有关,血清CX3CL1、CCL17水平联合检测对RA-ILD患者预后具有较高的预测价值。

宣肺合剂联合西药治疗慢性支气管炎急性发作的疗效

目的 观察宣肺合剂联合西药治疗慢性支气管炎急性发作的疗效,及其对血清CXC趋化因子受体4(CXCR4)、半乳糖凝集素-9(Gal-9)和趋化因子3(CCL3)水平的影响。方法 选择2020年1月-2021年12月在本院诊治的慢性支气管炎急性发作的患者96例,分为观察组和对照组各48例。对照组予以常规西药治疗,观察组在对照组的基础上予以宣肺合剂治疗。比较两组治疗后的疗效和不良反应,比较治疗前后喘息、咳痰、咳嗽积分、第一秒用力呼气量(FEV1)、用力肺活量(FVC)、最大通气量(MVV)、CXCR4、Gal-9和CCL3水平的变化。结果 观察组的总有效率为95.83%,对照组的总有效率为79.17%,观察组显著优于对照组(P<0.05);两组的不良反应率差异无统计学意义(P>0.05)。两组治疗前喘息、咳痰、咳嗽积分、FEV1、FVC、MVV、CXCR4、Gal-9和CCL3水平差异无统计学意义(P>0.05);治疗后两组的喘息、咳痰、咳嗽积分、CXCR4、Gal-9和CCL3水平均较治疗前显著降低,与对照组比较观察组出现明显降低(均P<0.01);治疗后两组的FEV1、FVC和MVV水平均较治疗前显著升高,与对照组比较观察组显著升高(均P<0.01)。结论 宣肺合剂能够提高西药对慢性支气管炎急性发作的疗效,缓解症状和改善肺功能,其机制可能与降低机体CXCR4、Gal-9和CCL3的水平有关。

注意缺陷多动障碍患儿血清ACE2,TWEAK和CCL5水平检测及诊断价值研究

目的 探究血清血管紧张素转换酶2(angiotensin-converting enzyme 2,ACE2),细胞因子肿瘤坏死因子样细胞凋亡弱诱导因子(tumor necrosis factor-like weak inducer of apoptosis,TWEAK)和CC趋化因子配体5(CC motif chemokine ligand 5,CCL5)水平在注意缺陷多动障碍(attention deficit hyperactivity disorder,ADHD)患儿诊断、病情严重程度评估中的价值。方法 选取2022年10月~2023年10月在河北省儿童医院就诊的125例ADHD患儿记为ADHD组,另选105例在河北省妇幼保健中心体检的健康儿童为对照组,根据临床总体印象严重程度量表(CGI-S)将患儿分为轻中度组(n=83)和重度组(n=42)。ELISA方法检测血清ACE2,TWEAK,CCL5,促黄体生成素(LH)和催乳素(PRL)水平,联合型瑞文测验(CRT)和Conners父母症状问卷(PSQ)对患儿认知和行为状况进行评分。Spearman相关性分析重度组血清ACE2,TWEAK,CCL5与CGI-S,CRT,PSQ评分的相关性;受试者工作特征(ROC)曲线分析ACE2,TWEAK,CCL5对ADHD及严重程度的诊断价值。结果 ADHD患儿血清ACE2(284.35±92.34 pg/ml),TWEAK(2.56±0.76 pg/ml)水平低于对照组(379.23±106.28 pg/ml,3.52±1.12 pg/ml),CCL5水平(7.36±2.37ng/ml)高于对照组(5.24±1.63 ng/ml),差异具有统计学意义(t=7.244,7.703,7.753,均P<0.05);重度组患儿CRT,血清ACE2,TWEAK水平低于轻中度组(t=5.318,6.686,6.490),而PSQ,CCL5水平较高于轻中度组(t=5.220,6.134),差异具有统计学意义(均P<0.05);Spearman相关性分析结果显示,重度组患儿血清ACE2,TWEAK水平与CGI-S,PSQ评分负相关(r=-0.432,-0.453;-0.421,-0.426,均P<0.001),与CRT评分呈正相关(r=0.427,0.418,均P<0.001);CCL5与CGI-S,PSQ评分呈正相关(r=0.421,0.433,均P<0.001),与CRT评分呈负相关(r=-0.446,P<0.001)。血清ACE2,TWEAK和CCL5诊断ADHD发生的AUC分别为0.814,0.803和0.807,三者联合诊断的AUC为0.945,优于各自单独诊断(Z=5.439,4.258,5.576,均P<0.001);血清ACE2,TWEAK,CCL5诊断重度ADHD的AUC分别为0.853,0.796和0.805,三者联合诊断的AUC为0.930,优于各自单独诊断(Z=2.604,3.851,3.567,均P<0.001)。结论 血清ACE2,TWEAK在ADHD患儿血清中低表达,而CCL5高表达,三者表达水平具有相关性,并且诊断ADHD发生和严重程度具有较高的价值。

妊娠糖尿病患者血清LRG1和CCL2水平对产后血糖转归的预测价值

目的 观察血清富亮氨酸α2-糖蛋白(LRG1)和CC趋化因子配体2(CCL2)水平对妊娠糖尿病(GDM)患者产后血糖转归的预测价值。方法 回顾性选取2020年1月至2023年6月邯郸市第一医院收治的110例GDM患者作为研究对象,根据产后6周血糖转归情况将患者分为正常组(n=65)与异常组(n=45)。比较两组患者孕晚期及产后的糖脂代谢指标[糖化血红蛋白(GHb)、空腹血糖、餐后2 h血糖(2 hPG)、胰岛素抵抗指数(HOMA-IR)、总胆固醇、甘油三酯、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)]和血清LRG1、CCL2水平。采用多因素Logistic回归分析对患者产后血糖转归的影响因素进行分析,应用受试者工作特征(ROC)曲线评估LRG1、CCL2水平及两者联合对GDM患者产后血糖转归的预测价值。结果 两组患者孕晚期及产后的GHb、总胆固醇、HDL-C、LDL-C水平比较,差异均无统计学意义(P>0.05);正常组患者孕晚期及产后的空腹血糖、2 hPG、HOMA-IR、甘油三酯水平均低于异常组,差异均有统计学意义(P<0.05)。正常组孕晚期及产后的LRG1、CCL2水平均低于异常组,差异均有统计学意义(P<0.05)。多因素Logistci回归分析显示,空腹血糖、HOMA-IR、LRG1、CCL2与GDM患者产后血糖转归密切相关(P<0.05)。血清LRG1、CCL2水平联合检测对GDM患者产后血糖转归预测的曲线下面积为0.879。结论 GDM患者产后血糖正常者的孕晚期及产后的血清LRG1、CCL2水平均明显低于异常者。LRG1、CCL2联合检测能够有效预测GDM患者产后血糖转归情况。

急性大出血患者血清CCL25和sTLT-1水平表达与输血相关性急性肺损伤发生的相关性研究

目的探讨急性大出血患者血清趋化因子C-C基元配体25(CC motif chemokine ligand 25,CCL25),可溶性髓样细胞触发受体样转录因子-1(soluble trem-like transcript-1,sTLT-1)水平表达与输血相关性急性肺损伤(transfusion-related acute lung injury,TRALI)发生的相关性。方法选取巴中市中心医院2021年8月~2023年7月期间收治的126例急性大出血患者为研究对象,根据Murray肺损伤评分判断患者在输血过程中是否发生TRALI,将发生TRALI患者设置为研究组(n=32),未发生TRALI患者设置为对照组(n=94)。比较两组患者一般临床病理资料;采用酶联免疫吸附测定法(ELISA)检测两组患者输血前和输血6 h后血清CCL25和sTLT-1水平;Spearman法分析血清CCL25,sTLT-1与Murray肺损伤评分的相关性;采用受试者工作特征(receiver operating characteristic,ROC)曲线分析CCL25和sTLT-1水平对急性大出血患者发生TRALI的预测价值。结果研究组患者输血6 h后血清CCL25(15.33±2.06 ng/ml),sTLT-1(580.19±55.62 pg/ml)水平高于输血前(12.86±1.24 ng/ml,486.33±49.25 pg/ml)和对照组(12.57±1.35 ng/ml,474.47±55.42 pg/ml),差异具有统计学意义(t=5.811,8.477;5.634,8.339,均P<0.05);对照组输血6h后CCL25,sTLT-1水平表达与输血前(12.852.18ng/ml,489.63±52.18 pg/ml)比较,差异无统计学意义(t=1.059,1.931,P>0.05)。研究组输血6h后血清CCL25和sTLT-1水平与Murray肺损伤评分均呈正相关(r=0.735,0.625,均P<0.05)。血清CCL25和sTLT-1预测急性大出血患者发生TRALI的AUC分别为0.810和0.877,截断值分别为14.609 ng/ml和512.583 pg/ml,二者联合预测的AUC为0.949,对急性大出血患者发生TRALI具有更高的预测价值(Z=0.139,0.072,均P<0.05)。结论CCL25和sTLT-1在急性大出血且发生TRALI患者血清中表达量上升,二者与Murray肺损伤评分之间具有相关性,血清CCL25,sTLT-1联合诊断对急性大出血患者发生TRALI具有预测价值。

Chemokine signaling involving chemokine (C-C motif) ligand 2 plays a role in descending pain facilitation

Objective Despite accumulating evidence on a role of immune cells and their associated chemicals in mecha- nisms of pain, few studies have addressed the potential role of chemokines in the descending facilitation of persistent pain. The present study was undertaken to test the hypothesis that the chemokine （C-C motif） ligand 2 （CCL2） （commonly known as monocyte chemoattractant protein-1） signaling in the rostral ventromedial medulla （RVM）, a pivotal structure in brainstem pain modulatory circuitry, is involved in descending pain facilitation in rats. Methods An L5 spinal nerve ligation （SNL） was produced in rats under pentobarbital anesthesia. Western blot and immunohistochemistry were used to detect the expression levels of CCL2 and CCL2 receptor （CCR2）, and examine their distributions compared with the neuronal marker NeuN as well as glial markers glial fibrillary acidic protein （GFAP, astroglial） and CD 11 b （microglial）, respectively. Results SNL induced an increase in CCL2 expression in the RVM, and this returned to the control level at 4 weeks after injury. The induced CCL2 colocalized with NeuN, but not with GFAP and CD1 lb. CCR2 was also upregu- lated by SNL in the RVM, and this increase lasted for at least 4 weeks. CCR2 was colocalized with CD1 lb but not GFAP. Few RVM neurons also exhibited CCR2 staining. Neutralizing CCL2 with an anti-CCL2 antibody （0.2-20 ng） or injecting RS-102895 （0.1-10 pmol）, a CCR2b chemokine receptor antagonist, into the RVM on day 1 after SNL, significantly at- tenuated the established thermal and mechanical hypersensitivity. In addition, injection of recombinant rat CCL2 （0.03-3 pmol） into the RVM induced dose-dependent hyperalgesia, which was prevented by pretreatment with RS-102895 （10 pmol）. Interleukin-β （IL-1]3）, a potent inducer of neuronal CCL2, was also selectively upregulated in RVM reactive as- trocytes. Injection of IL-1 ]3 （120 fmol） into the RVM induced behavioral hyperalgesia, which was blocked by RS-102895 （10 pmol）. However, an IL-1 receptor antagonist （3 pmol） did not prevent CCL2 （3 pmol）-induced hyperalgesia. These results suggest that the effect of CCL2 is downstream to IL-113 signaling. Conclusion The IL-1 β and CCL2-CCR2 signaling cascades play a role in neuron-glia-cytokine interactions and the descending facilitation of neuropathic pain.

Intestinal epithelial chemokine (C-C motif) ligand 7 overexpression protects against high fat diet-induced obesity and hepatic steatosis in mice

Background:We previously found that the intestinal epithelial chemokine(C-C motif)ligand 7(CCL7)plays an important role in the development of toxin-induced acute liver damage.The detailed effects of intestinal epithelial CCL7 on chronic diseases;however,are still unclear.Here,we aimed to investigate the impact of intestinal epithelial CCL7 overexpression on high-fat diet(HFD)-induced obesity and steatohepatitis in mice.Methods:Intestinal epithelial CCL7 overexpression(CCL7tgIEC)mice and their wild-type(WT)littermates were fed with normal chow or HFD for 16 weeks to induce obesity and non-alcoholic fatty liver disease.Body weight gain,as well as adipose tissue index were assessed.Liver injury was monitored by histological analysis and real time polymerase chain reaction.Gut microbial composition was analyzed by 16S rRNA gene sequencing.Results:We found that the CCL7tgIEC mice on a HFD had markedly decreased weight gain(8.9 vs.17.0 g,P<0.05)and a lower adipose tissue index that include mesenteric fat(1.0%vs.1.76%,P<0.05),gonadal fat(2.1%vs.6.1%,P<0.05),subcutaneous fat(1.0%vs.2.8%,P<0.05)compared to WT animals.HFD-induced glucose intolerance and insulin resistance were also significantly improved in CCL7tgIEC mice compared to WT.Furthermore,HFD-fed CCL7tgIEC mice displayed less hepatic lipid accumulation and lower expression of inflammatory factors than WT mice.16S rRNA gene sequencing demonstrated that CCL7 overexpression in intestinal epithelial cells improved HFD-induced gut microbial dysbiosis.Conclusions:Our study revealed that CCL7 overexpression in the intestinal epithelium protects mice against the progression of diet-induced obesity,hepatic steatosis,and enteric dysbiosis.

脓毒症继发急性肺损伤患者血清CCL25和PARK7表达水平及其临床价值研究

目的探讨脓毒症患者血清C-C模体趋化因子配体25(C-C motif chemokine ligand 25,CCL25),人帕金森病蛋白7(Parkinson’s disease protein 7,PARK7)水平与急性肺损伤(acute lung injury,ALI)的关系及临床意义。方法选取2019年2月~2023年2月合肥京东方医院诊治的138例脓毒症患者为脓毒症组,根据是否继发ALI分为ALI组(n=40)和非ALI组(n=98),以同期体检的70例健康人为对照。酶联免疫吸附法(enzyme linked immunosorbent assay,ELISA)检测血清CCL25和PARK7水平。Pearson相关分析血清CCL25,PARK7与临床指标的相关性。多因素Logistic回归分析脓毒症继发ALI的危险因素。受试者工作特征曲线分析血清CCL25和PARK7水平对脓毒症继发ALI的预测价值。结果脓毒症组患者血清CCL25(367.52±46.87ng/L),PARK7(54.26±17.45μg/L)水平高于对照组(48.17±5.26ng/L,12.31±4.12μg/L),差异具有统计学意义(t=46.825,19.813,均P<0.05)。ALI组患者血清CCL25(434.65±52.87ng/L vs 340.12±42.64ng/L),PARK7(103.47±22.51μg/L vs 34.18±7.46μg/L),呼吸指数(1.58±0.48 vs 0.88±0.07)、动脉血二氧化碳分压(Pa CO_(2))(50.11±6.27mm Hg vs 40.42±5.20mm Hg)、急性生理学与慢性健康状况评价Ⅱ(APACHEⅡ)评分(23.37±3.82分vs 17.15±3.41分)、序贯器官衰竭(SOFA)评分(13.56±2.93分vs 10.18±2.81分)均高于非ALI组,而氧合指数(237.14±23.56分vs341.14±21.37分)、动脉血氧分压(Pa O_(2))(55.87±8.03mm Hg vs 63.11±7.14mm Hg)低于非ALI组,差异具有统计学意义(t=10.998,27.151,14.145,9.342,9.385,6.332,25.172,5.210,均P<0.05)。ALI组患者血清CCL25,PARK7水平与APACHEⅡ评分、SOFA评分、呼吸指数、Pa CO_(2)呈正相关(r=0.579~0.801,均P<0.05),与氧合指数、Pa O_(2)呈负相关(r=-0.687,-0.643;-0.654,-0.712,均P<0.05)。血清CCL25(OR=1.309,95%CI:1.040~1.646),PARK7(OR=1.288,95%CI:1.016~1.633),APACHEⅡ评分(OR=1.188,95%CI:1.019~1.384),SOFA评分(OR=1.197,95%CI:1.006~1.425)是影响脓毒症患者继发ALI的独立危险因素。血清CCL25,PARK7联合对脓毒症继发ALI预测的曲线下面积(95%CI)[0.833(0.784~0.872)]大于单项指标[0.770(0.725~0.835),0.741(0.691~0.790)],差异具有统计学意义(Z=4.602,4.318,均P<0.05)。结论脓毒症患者血清CCL25和PARK7水平升高,是影响脓毒症继发ALI发生的独立危险因素,两者联合对脓毒症继发ALI具有较高的预测价值。

尿CXCL10水平对PICU重症患儿死亡风险的预测价值

目的探讨尿C-X-C基序趋化因子10(CXCL 10)水平对重症患儿住儿科重症监护病房(PICU)期间死亡风险的预测价值。方法选择2016年9月至12月以及2017年12月至2018年1月PICU收治的323例重症患儿作为研究对象。根据入住PICU期间转归情况分为生存组(295例)和死亡组(28例),比较组间患儿临床特征。采用酶联免疫吸附法检测患儿入住PICU第1周尿CXCL 10水平的动态变化。运用多因素逐步线性回归分析明确尿CXCL 10水平与临床变量的相关性。多因素logistic回归分析评估在校正混杂因素后尿CXCL 10与病死率的关系,采用受试者工作特征曲线下面积(AUC)评估尿CXCL10对重症患儿病死率的预测价值。结果死亡组尿CXCL10初始值和最大值均明显高于生存组(P<0.05)。多因素线性和logistic回归分析均显示尿CXCL10的初始值及最大值与死亡显著相关(P<0.05)。尿CXCL10初始和最大值预测重症患儿死亡的AUC值分别为0.780(95%CI:0.689~0.872,P<0.001)、0.846(95%CI:0.769~0.923,P<0.001)。结论尿CXCL 10是重症患儿死亡的独立预测指标。

血清IL-35 CCL19水平与系统性红斑狼疮患儿免疫学指标的相关性研究

目的:观察系统性红斑狼疮(SLE)患儿血清白介素-35(IL-35)、C-C基序趋化因子配体19(CCL19)变化情况,并分析其与患儿免疫学指标的关联性。方法:纳入2022年1月至2024年3月本院收治的SLE患儿97例,并同期选取97例健康儿童进行对照研究,观察患儿血清IL-35、CCL19水平变化,并分析其与免疫学指标(包括抗ds-DNA抗体、免疫球蛋白(Ig)及补体C3、C4)的相关性。结果:与健康儿童相比,SLE患儿血清IL-35水平明显较低,CCL19水平明显较高,差异均有统计学意义(P<0.05)。与非活动期SLE患儿相比,活动期SLE患儿血清IL-35、C3、C4水平明显较低,CCL19、抗ds-DNA抗体、IgM、IgG、IgA水平明显较高,差异均有统计学意义(P<0.05)。Pearson相关性分析显示:SLE患儿血清IL-35水平与抗ds-DNA抗体、IgM、IgG、IgA水平成负相关性,与C3、C4水平成正相关,差异均有统计学意义(r=-0.314、-0.203、-0.301、-0.201、0.318、0.383,P<0.05);SLE患儿血清CCL19水平与抗ds-DNA抗体、IgM、IgG、IgA水平成正相关性,与C3、C4水平成负相关差异均有统计学意义(r=0.272、0.209、0.362、0.202、-0.219、-0.391,P<0.05)。线性回归显示:SLE患儿抗ds-DNA抗体与IL-35水平存在负向影响关系,差异有统计学意义(P<0.05),C3则与IL-35水平存在正向影响关系,差异有统计学意义(P<0.05);SLE患儿IgG与CCL19水平存在正向影响关系,差异有统计学意义(P<0.05)。结论:SLE患儿血清IL-35、CCL19水平异常变化,与抗ds-DNA抗体、IgM、IgG、IgA水平存在一定的相关性,其中抗ds-DNA抗体、C3与IL-35,IgG与CCL19间存在一定的影响关系。

The miR-9-5p/CXCL11 pathway is a key target of hydrogen sulfide-mediated inhibition of neuroinflammation in hypoxic ischemic brain injury

We previously showed that hydrogen sulfide(H2S)has a neuroprotective effect in the context of hypoxic ischemic brain injury in neonatal mice.However,the precise mechanism underlying the role of H2S in this situation remains unclear.In this study,we used a neonatal mouse model of hypoxic ischemic brain injury and a lipopolysaccharide-stimulated BV2 cell model and found that treatment with L-cysteine,a H2S precursor,attenuated the cerebral infarction and cerebral atrophy induced by hypoxia and ischemia and increased the expression of miR-9-5p and cystathionineβsynthase(a major H2S synthetase in the brain)in the prefrontal cortex.We also found that an miR-9-5p inhibitor blocked the expression of cystathionineβsynthase in the prefrontal cortex in mice with brain injury caused by hypoxia and ischemia.Furthermore,miR-9-5p overexpression increased cystathionine-β-synthase and H2S expression in the injured prefrontal cortex of mice with hypoxic ischemic brain injury.L-cysteine decreased the expression of CXCL11,an miR-9-5p target gene,in the prefrontal cortex of the mouse model and in lipopolysaccharide-stimulated BV-2 cells and increased the levels of proinflammatory cytokines BNIP3,FSTL1,SOCS2 and SOCS5,while treatment with an miR-9-5p inhibitor reversed these changes.These findings suggest that H2S can reduce neuroinflammation in a neonatal mouse model of hypoxic ischemic brain injury through regulating the miR-9-5p/CXCL11 axis and restoringβ-synthase expression,thereby playing a role in reducing neuroinflammation in hypoxic ischemic brain injury.

血清CX3CL1、LTB4水平与牙列缺失患者口腔种植修复预后的关系

目的 探讨血清趋化因子C-X3-C基元配体1(CX3CL1)、白三烯B4(LTB4)水平与牙列缺失患者口腔种植修复预后的关系。方法 选择2020年7月至2022年6月在该院接受口腔种植修复的牙列缺失患者233例作为观察组,根据术后6个月种植体预后情况,将观察组分为预后优良组与预后不佳组;另选取同期在该院体检的无牙列缺失、缺损的健康受试者233例作为对照组。检测所有受试者血清CX3CL1、LTB4水平;采用Pearson相关分析牙列缺失患者血清CX3CL1水平与LTB4水平的相关性;采用多因素Logistic回归分析影响口腔种植修复预后不佳的影响因素;绘制受试者工作特征(ROC)曲线分析血清CX3CL1、LTB4水平对口腔种植修复后预后不佳的预测价值。结果 观察组血清CX3CL1、LTB4水平均高于对照组(P<0.05)。Pearson相关性分析结果显示,牙列缺失患者血清CX3CL1水平与LTB4水平呈正相关(r=0.518,P<0.05)。本研究中,预后效果良好192例(预后优良组),其余41例作为预后不佳组;预后不佳组患者血清CX3CL1、LTB4水平显著高于预后优良组(P<0.05)。多因素Logistic回归分析结果显示,吸烟及CX3CL1、LTB4水平升高是牙列缺失患者口腔种植修复预后不佳的独立危险因素(P<0.05);ROC曲线分析结果显示,血清CX3CL1、LTB4单独及二者联合预测口腔种植修复后预后不佳的AUC分别为0.778、0.773、0.945。结论 牙列缺失患者血清CX3CL1、LTB4水平升高与口腔种植修复预后不佳密切相关,临床上可用于口腔种植修复后的预后评估。

新生儿持续肺动脉高压患儿血清CXCL8、CXCL12与一氧化氮吸入治疗临床转归的关系

目的探讨新生儿持续肺动脉高压(persistent pulmonary hypertension of newborn,PPHN)患儿血清人CXC型趋化因子配体8(C-X-C motif chemokine ligand 8,CXCL8)、CXCL12与一氧化氮吸入治疗临床转归的关系。方法选择2021-08/2023-05月作者医院收治并给予一氧化氮吸入治疗的PPHN患儿135例为研究对象。根据患儿出院时临床转归结局分为死亡组(n=32)和存活组(n=103)。比较两组PPHN患儿血清CXCL8、CXCL12水平。单因素及多因素Logistic回归模型分析接受一氧化氮吸入治疗PPHN患儿临床转归的影响因素。受试者工作特征(receiver operating characteristic,ROC)曲线分析血清CXCL8、CXCL12对接受一氧化氮吸入治疗PPHN患儿临床转归的预测价值。结果死亡组患儿血清CXCL8、CXCL12水平显著高于存活组(P均<0.05)。多因素Logsitic回归分析结果显示,血清CXCL8水平升高、血清CXCL12水平升高、早产、出生时Apgar评分0~3分、合并并发症是接受一氧化氮吸入治疗的PPHN患儿死亡的危险因素,肺表面活性物质应用、吸入一氧化氮早期反应则是保护因素(P<0.05)。ROC曲线分析结果显示,血清CXCL8、CXCL12联合检测对接受一氧化氮吸入治疗的PPHN患儿死亡预测的曲线下面积(area under the curve,AUC)为0.828,大于血清CXCL8、CXCL12单独检测(AUC分别为0.762、0.714)。结论PPHN患儿血清CXCL8、CXCL12水平升高与接受一氧化氮治疗的不良临床转归有关,且CXCL8、CXCL12水平升高是PPHN患儿死亡的危险因素。CXCL8、CXCL12联合检测对接受一氧化氮治疗PPHN患儿死亡具有较高的预测价值。