Interplay between micro RNA-17-5p, insulin-like growth factor-Ⅱ through binding protein-3 in hepatocellular carcinoma

AIM: To investigate the effect of microR NA on insulinlike growth factor binding protein-3(IGFBP-3) and hence on insulin-like growth factor-Ⅱ(IGF-Ⅱ) bioavailability in hepatocellular carcinoma(HCC).METHODS: Bioinformatic analysis was performed using microrna.org, DIANA lab and Segal lab softwares. Total RNA was extracted from 23 HCC and 10 healthy liver tissues using mir Vana mi RNA Isolation Kit. microR NA-17-5p(miR-17-5p) expression was mimicked and antagonized in Hu H-7 cell lines using Hi Per Fect Transfection Reagent, then total RNA was extracted using Biozol reagent then reverse transcribed into cD NA followed by quantification of mi R-17-5p and IGFBP-3 expression using Taq Man real-time quantitative PCR. Luciferase reporter assay was performed to validate the binding of miR-17-5p to the 3'UTR of IGFBP-3. Free IGF-Ⅱ protein was measured in transfected Hu H-7 cells using IGF-Ⅱ ELISA kit. RESULTS: Bioinformatic analysis revealed IGFBP-3 as a potential target for miR-17-5p. Screening of miR-17-5p and IGFBP-3 revealed a moderate negative correlation in HCC patients, where mi R-17-5p was extensively underexpressed in HCC tissues(P = 0.0012), while IGFBP-3 showed significant upregulation in the same set of patients(P = 0.0041) compared to healthy donors. Forcing mi R-17-5p expression in Hu H-7 cell lines showed a significant downregulation of IGFBP-3 mR NA expression(P = 0.0267) and a significant increase in free IGF-Ⅱ protein(P = 0.0339) compared to mock untransfected cells using unpaired t-test. Luciferase assay validated IGFBP-3 as a direct target of mi R-17-5p; luciferase activity was inhibited by 27.5% in cells co-transfected with miR-17-5p mimics and the construct harboring the wild-type binding region 2 of IGFBP-3 compared to cells transfected with this construct alone(P = 0.0474).CONCLUSION: These data suggest that regulating IGF-Ⅱ bioavailability and hence HCC progression can be achieved through targeting IGFBP-3 via manipulating the expression of miR NAs.

DIAGNOSTIC VALUE OF SERUM INSULIN- LIKE GROWTH FACTOR BINDING PROTEIN- 3 IN CHILDREN WITH OR WITHOUT GROWTH HORMONE DEFICIENCY

OBJECTIVE: To study the value of serum insulin-like growth factor binding protein-3 (IGFBP-3) levels in differential diagnosis of growth hormone deficiency (GHD). METHODS: To measure serum IGFBP-3 levels by RIA in normal children and adolescents, GHD children and short-stature children without GHD. RESULTS: Serum level of IGFBP-3 in 129 children with untreated GHD and with no pubertal development was 1.6 +/- 0.9 mg/L, which was less than that in normal group of the same age, but overlapped with the normal children in Tanner stage I. After six-month treatment with recombinant human growth hormone (rhGH), serum level of IGFBP-3 in 59 GHD significantly increased from 1.3 +/- 0.7 mg/L to 2.7 +/- 0.9 mg/L, accompanied by an increase of body heights, growth velocities and serum level of IGF-1. Serum level of IGFBP-3 in 55 short-stature children without GHD was 3.3 +/- 2.2 mg/L, which was not significantly different from that in normal group. CONCLUSION: Serum IGFBP-3 level can reflect the status of GH secretion in children with GHD and is a useful marker for differential diagnosis of GHD.

Insulin-like growth factor 2 mRNA-binding protein 1 promotes cell proliferation via activation of AKT and is directly targeted by microRNA-494 in pancreatic cancer

BACKGROUND Studies have shown that insulin-like growth factor 2 mRNA-binding protein 1(IGF2BP1)plays critical roles in the genesis and development of human cancers.AIM To investigate the clinical significance and role of IGF2BP1 in pancreatic cancer.METHODS Expression levels of IGF2BP1 and microRNA-494(miR-494)were mined based on Gene Expression Omnibus datasets and validated in both clinical samples and cell lines by quantitative real-time polymerase chain reaction and Western blot.The relationship between IGF2BP1 expression and clinicopathological factors of pancreatic cancer patients was analyzed.The effect and mechanism of IGF2BP1 on pancreatic cancer cell proliferation were investigated in vitro and in vivo.Analyses were performed to explore underlying mechanisms of IGF2BP1 upregulation in pancreatic cancer and assays were carried out to verify the posttranscriptional regulation of IGF2BP1 by miR-494.RESULTS We found that IGF2BP1 was upregulated and associated with a poor prognosis in pancreatic cancer patients.We showed that downregulation of IGF2BP1 inhibited pancreatic cancer cell growth in vitro and in vivo via the AKT signaling pathway.Mechanistically,we showed that the frequent upregulation of IGF2BP1 was attributed to the downregulation of miR-494 expression in pancreatic cancer.Furthermore,we discovered that reexpression of miR-494 could partially abrogate the oncogenic role of IGF2BP1.CONCLUSION Our results revealed that upregulated IGF2BP1 promotes the proliferation of pancreatic cancer cells via the AKT signaling pathway and confirmed that the activation of IGF2BP1 is partly due to the silencing of miR-494.

Insulin-like growth factor binding protein related protein 1 knockdown attenuates hepatic ?brosis via the regulation of MMPs/TIMPs in mice

Background: Previous research suggested that insulin-like growth factor binding protein related protein 1(IGFBPrP1), as a novel mediator, contributes to hepatic fibrogenesis. Matrix metalloproteinases(MMP) and tissue inhibitors of metalloproteinases(TIMP) play an essential role in hepatic fibrogenesis by regulating homeostasis and remodeling of the extracellular matrix(ECM). However, the interaction between IGFBPrP1 and MMP/TIMP is not clear. The present study was to knockdown IGFBPrP1 to investigate the correlation between IGFBPrP1 and MMP/TIMP in hepatic fibrosis. Methods: Hepatic fibrosis was induced by thioacetamide(TAA) in mice. Knockdown of IGFBPrP1 expression by ultrasound-targeted microbubble destruction-mediated CMB-shRNA-IGFBPrP1 delivery, or inhibition of the Hedgehog(Hh) pathway by cyclopamine treatment, was performed in TAA-induced liver fibrosis mice. Hepatic fibrosis was determined by hematoxylin and eosin and Sirius red staining. Hepatic expression of IGFBPrP1, α-smooth muscle actin( α-SMA), transforming growth factor β 1(TGF β1), collagen I, MMPs/TIMPs, Sonic Hedgehog(Shh), and glioblastoma family transcription factors(Gli1) were investigated by immunohistochemical staining and Western blotting analysis. Results: We found that hepatic expression of IGFBPrP1, TGF β1, α-SMA, and collagen I were increased longitudinally in mice with TAA-induced hepatic fibrosis, concomitant with MMP2/TIMP2 and MMP9/TIMP1 imbalance and Hh pathway activation. Knockdown of IGFBPrP1 expression, or inhibition of the Hh pathway, reduced the hepatic expression of IGFBPrP1, TGF β1, α-SMA, and collagen I and re-established MMP2/TIMP2 and MMP9/TIMP1 balance. Conclusions: Our findings suggest that IGFBPrP1 knockdown attenuates liver fibrosis by re-establishing MMP2/TIMP2 and MMP9/TIMP1 balance, concomitant with the inhibition of hepatic stellate cell activation, down-regulation of TGF β1 expression, and degradation of the ECM. Furthermore, the Hh pathway mediates IGFBPrP1 knockdown-induced attenuation of hepatic fibrosis through the regulation of MMPs/TIMPs balance.

Interaction between insulin-like growth factor binding protein-related protein 1 and transforming growth factor beta 1 in primary hepatic stellate cells

BACKGROUND: We previously showed that insulin-like growth factor binding protein-related protein 1 (IGFBPrP1) is a novel mediator in liver fibrosis. Transforming growth factor beta 1 (TGF beta 1) is known as the strongest effector of liver fibrosis. Therefore, we aimed to investigate the detailed interaction between IGFBPrP1 and TGF beta 1 in primary hepatic stellate cells (HSCs). METHODS: We overexpressed TGF beta 1 or IGFBPrP1 and inhibited TGF beta 1 expression in primary HSCs for 6, 12, 24, 48, 72, and 96 hours to investigate their interaction and observe the accompanying expressions of a-smooth muscle actin (alpha-SMA), collagen I, fibronectin, and phosphorylated-mothers against decapentaplegic homolog 2/3 (p-Smad2/3). RESULTS: We found that the adenovirus vector encoding the TGF beta 1 gene (AdTGF beta 1) induced IGFBPrP1 expression while that of alpha-SMA, collagen I, fibronectin, and TGF beta 1 increased gradually. Concomitantly, AdIGFBPrP1 upregulated TGF beta 1, alpha-SMA, collagen I, fibronectin, and p-Smad2/3 in a time-dependent manner while IGFBPrP1 expression was decreased at 96 hours. Inhibition of TGF beta 1 expression reduced the IGFBPrP1-stimulated expression of alpha-SMA, collagen I, fibronectin, and p-Smad2/3. CONCLUSIONS: These findings for the first time suggest the existence of a possible mutually regulation between IGFBPrP1 and TGF beta 1, which likely accelerates liver fibrosis progression. Furthermore, IGFBPrP1 likely participates in liver fibrosis in a TGF beta 1-depedent manner, and may act as an upstream regulatory factor of TGF beta 1 in the Smad pathway.

Increased expression of insulin-like growth factor-binding protein-3 is implicated in erectile dysfunction in two-kidney one-clip hypertensive rats after propranolol treatment

This study aimed to investigate the role of insulin-like growth factor-binding protein-3 （IGFBP-3） in erectUe dysfunction （ED） in two-kidney one-clip （2K-1C） hypertensive rats treated with the β-blocking agent propranolol. Adult male Wistar rats were randomly divided into three groups： a normal control group, a hypertensive control group and a propranolol treatment group （n=9）. After 4 weeks of propranolol treatment, intracavemous pressure （ICP） responses to electrical stimulation of the cavernous nerves were evaluated. The expression of IGFBP-3 and insulin-like growth factor-1 （IGF-1） mRNA and protein in the rat cavernous tissue were detected by quantitative real-time PCR and Western blot, respectively. The concentration of cyclic guanosine monophosphate （cGMP） in the cavernous tissue was determined by enzyme-linked immunosorbent assay （ELISA）. Cavernosal pressure in response to cavernous nerve stimulation was decreased 4 weeks after propranolol treatment （P〈0.01, compared to the hypertensive control group）. IGFBP-3 mRNA and protein expression was increased in the propranolol treatment group compared to the hypertensive control group （P〈O.01）, whereas IGF-1 expression was decreased in the propranolol treatment group compared to the hypertensive control group （P〈0.01）. In addition, cavernous cGMP concentration was decreased in the prepranolol treatment group compared to the hypertensive control group （P〈0.01）. Taken together, these results suggest that the upregulation of IGFBP-3 may play a role in the development of ED in hypertensive rats.

Modified insulin-like growth factor 1 containing collagen-binding domain for nerve regeneration

Insulin-like growth factor 1 （IGF-I） is a potential nutrient for nerve repair. However, it is impractical as a therapy because of its limited half- life, rapid clearance, and limited target specificity. To achieve targeted and long-lasting treatment, we investigated the addition of a binding structure by fusing a collagen-binding domain to IGF- 1. After confirming its affinity for collagen, the biological activity of this construct was examined by measuring cell proliferation after transfection into PC12 and Schwann cells using a 3-（4,5-dimethyl-2-thiazolyl）-2,5-di- phenyl-2-H-tetrazolium bromide assay. Immunofluorescence staining was conducted to detect neurofilament and microtubule-associated protein 2 expression, while real time-polymerase chain reaction was utilized to determine IGF-1 receptor and nerve growth/actor mRNA expression. Our results demonstrate a significant increase in collagen-binding activity of the recombinant protein compared with IGF-1. Moreover, the recombinant protein promoted proliferation of PC12 and Schwann cells, and increased the expression of neurofilament and microtubule-associated protein 2. Importantly, the recombinant protein also stimulated sustained expression of IGF-1 receptor and nerve growth factor mRNA for days. These results show that the recombinant protein achieved the goal of targeting and long-lasting treatment, and thus could become a clinically used factor for promoting nerve regeneration with a prolonged therapeutic effect.

Changes of insulin-like growth factor-Ⅱ and insulin-like growth factor binding protein-3 in cerebrospinal fluid of children with tuberculous meningitis

BACKGROUND： Recent studies have found that insulin-like growth factors （IGFs） and insulin-like growth factor binding protein-3 （IGFBP-3） have stronger neurotrophic and neuroprotective effects. But whether their levels in cerebrospinal fluid could be used as an auxiliary indicator in differentially diagnosing tuberculous meningitis and viral encephalitis is not yet clear. OBJECTIVE： To explore the changes of insulin-like growth factor-Ⅱ （IGF-Ⅱ ） and IGFBP-3 in cerebrospinal fluid （CSF） of children with tuberculous meningitis and the significance of the changes. DESIGN： A non-randomized concurrent controlled study. SETTING： Department of Pediatric Internal Medicine, the First Affiliated Hospital of Xinxiang Medical College. PARTICIPANTS： Thirty children with tuberculous meningitis （14 males and 16 females） were selected from the Department of Pediatric Internal Medicine, the First Affiliated Hospital of Xinxiang Medical College from January 2005 to December 2006. Tuberculous meningitis was diagnosed according to their clinical manifestations, the history of close contact with tuberculosis, typical cerebrospinal fluid changes of tuberculous meningitis, positive tuberculosis antibody and effective antituberculosis treatment. There were 30 children （13 males and 17 females） with viral encephalitis, and viral encephalitis was diagnosed according to epidemiological history, clinical manifestations, conventional and biochemical changes of cerebrospinal fluid, and negative bacteriology judgment. Meanwhile, 30 children （13 males and 17 females） without infectious and central nervous system disease were selected as the control group. Informed consent was obtained from the parents of all the enrolled children. METHODS： ①The lumbar puncture operation was implemented immediately to obtain cerebrospinal fluid （3 mL）. The contents of IGF-Ⅱ and IGFBP-3 were detected with immunoradiometric assay. The concentrations of glucose and protein in cerebrospinal fluid were determined with a dry-chemical method. The number of white blood cells was counted by Fushi Method. ②The Pearson correlation analysis was used to analyze the correlation of the contents of IGF-Ⅱ and IGFBP-3 in cerebrospinal fluid with the leucocyte counting and the concentrations of glucose and protein in cerebrospinal fluid. MAIN OUTCOME MEASURES： The contents of IGF- Ⅱ and IGFBP-3 in cerebrospinal fluid, and their correlation with the leucocyte counting and the concentrations of glucose and protein in cerebrospinal fluid. RESULTS： ①Contents of IGF-Ⅱ and IGFBP-3 in cerebrospinal fluid： The contents of IGF-Ⅱ and IGFBP-3 in cerebrospinal fluid in the tuberculous meningitis group were significantly higher than those in the encephalitis virus group and control group （P 〈 0.05）. There was no significant difference in the contents of IGF- Ⅱ and IGFBP-3 in cerebrospinal fluid between the viral encephalitis group and control group （P 〉 0.05）. ②Correlation： The IGF- Ⅱ and IGFBP-3 contents in cerebrospinal fluid were positively correlated with the protein concentration in cerebrospinal fluid （r =0.821, 0.855, P 〈 0.01）, but negatively with the glucose （r =0.742, - 0.605, P 〈 0.01）. CONCLUSION- ①IGFs and IGVBPs are involved in the pathophysiological process of tuberculous meningitis, as well as the glucose and protein metabolism in cerebrospinal fluid. ②The IGF-Ⅱ and IGFBP-3 contents in cerebrospinal fluid can be used as the auxiliary indicators to differentially diagnose tuberculous meningitis and viral enceohalitis.

Insulin-like growth factor-binding protein-3 inhibits IGF-1-induced proliferation of human hepatocellular carcinoma cells

OBJECTIVE Basic fibroblast growth factor(b FGF)and platelet-derived growth factor(PDGF)produced by hepatocellular carcinoma(HCC)cells are responsible for the cell growth.Accumulating evidence shows that insulin-like growth factor-binding protein-3(IGFBP-3)suppresses HCC cell proliferation in both IGF-dependent and independent manners.The present study is to investigate whether treatment with exogenous IGFBP-3 inhibits bF GF and PDGF production and the cell proliferation of HCC cells.METHODS Cell Counting Kit 8 assay were designed to detect HCC cell proliferation,transcription factor early growth response-1(EGR1)involving in IGFBP-3 regulation of b FGF and PDGF were detected by RT-PCR and Western blot assays.Western blot assay was adopted to detect the IGFBP-3 regulating insulin-like growth factor 1 receptor(IGF-1R)signaling pathway.RESULTS The present study demonstrates that IGFBP-3 suppressed IGF-1-induced b FGF and PDGF expression while it does not affect their expression in the absence of IGF-1.To delineate the underlying mechanism,Western-blot and RT-PCR assays confirmed that the transcription factor early growth response protein 1(EGR1)is involved in IGFBP-3 regulation of b FGF and PDGF.IGFBP-3 inhibition of type 1 insulin-like growth factor receptor(IGF1R),ERK and AKT activation is IGF-1-dependent.Furthermore,transient transfection with constitutively activated AKT or MEK partially blocks the IGFBP-3 inhibition of EGR1,b FGF and PDGF expression.CONCLUSION In conclusion,these findings suggest that IGFBP-3suppresses transcription of EGR1 and its target genes b FGF and PDGF through inhibiting IGF-1-dependent ERK and AKT activation.It demonstrates the importance of IGFBP-3 in the regulation of HCC cell proliferation,suggesting that IGFBP-3 could be a target for the treatment of HCC.

Effects of Exogenous Growth Hormone on Growth Hormone-Insulin-Like Growth Factor Axis of Human Gastric Cancer Cell

Aim: To study effects of recombinant human growth hormone (rhGH) on growth hormone-insulin-like growth factor axis (GH-IGFs) of human gastric cancer cell in vivo in order to reveal part mechanism of growth effects of rhGH on gastric cancer. Methods: Nude mice were randomly divided into control group, cisplatin (DDP) group, rhGH group and DDP + rhGH group after human gastric cancer xenograft model of node mice was successfully founded and drugs were used for 6 days. We investigated volume of tumor, inhibitory rate of tumor and cell cycle by slide gauge and flow cytometry. In addition, We also respectively investigated insulin-like growth factor-I (IGF-I) and insulin-like growth factor binding protein-3 (IGFBP-3) of blood serum of nude mice, IGF-ImRNA, insulin-like growth factor-I receptor (IGF-IR) mRNA and IGFBP-3 mRNA of xenograft of nude mice by enzyme linked immunosorbent assay (ELISA) and semiquantitative reverse transcriptase-polymerase chain reaction (RT-PCR) on the first day of completing use of drugs later. Results: Tumor grew obviously slowly and tumor inhibitory rate obviously rose in DDP group and DDP + rhGH group compared with control group and rhGH group (p p p < 0.05). Expressions of IGF-I mRNA and IGF-IR mRNA were not obviously different in all groups. But expression of IGFBP-3 mRNA obviously increased in rhGH group, DDP group and DDP + rhGH group compared with control group;meanwhile, expression of IGFBP-3 mRNA also obviously increased in DDP + rhGH group compared with control group, DDP group and rhGH group. Conclusion: Our results indicated rhGH in short-time use did not improve proliferation of human gastric cancer cells and its mechanism was possible that rhGH in short-time use raised simultaneously IGF-I and IGFBP-3 of blood serum and increased IGFBP-3 mRNA, but degraded ratio of IGF-I and IGFBP-3 of blood serum in human gastric cancer cells.

基于心功能及IGFBP7、sST2、CGRP、ET分析沙库巴曲缬沙坦在治疗冠心病合并慢性心力衰竭中的应用效果

目的 分析冠心病(CHD)合并慢性心力衰竭(CHF)患者应用沙库巴曲缬沙坦治疗的效果。方法 选择2020年1月至2023年1月邯郸市第四医院收治的86例CHD合并CHF患者,以随机数字表法将其分为对照组和试验组各43例。两组CHD治疗均应用硝酸酯类、他汀类及抗血小板药物,对照组CHF治疗应用坎地沙坦酯片、醛固酮受体拮抗剂及β受体阻滞剂,试验组治疗则将对照组中的坎地沙坦酯片替换为沙库巴曲缬沙坦钠片。比较两组疗效、不良反应、心功能指标[左室短轴缩短率(LVFS)、左室射血分数(LVEF)、6min步行距离(6 MWD)]、心室重构指标[Ⅲ型胶原前肽(PⅢP)、层粘蛋白(LN)、基质金属蛋白酶-9(MMP-9)]、心肌损伤和血管内皮功能相关指标[胰岛素样生长因子结合蛋白7(IGFBP7)、可溶性生长刺激表达基因2(sST2)、降钙素基因相关肽(CGRP)、内皮素(ET)]。结果与对照组比,试验组治疗3个月后的总有效率更高,差异有统计学意义(P<0.05)。两组治疗3个月后的LVFS、LVEF、6 MWD、IGFBP7、CGRP与治疗前比升高,且试验组与对照组比更高,差异有统计学意义(P<0.05);PⅢP、LN、MMP-9、sST2、ET降低,试验组与对照组比更低,差异有统计学意义(P<0.05)。两组不良反应总发生率对比差异无统计学意义(P>0.05)。结论 沙库巴曲缬沙坦可有效调节CHD合并CHF患者IGFBP7、sST2、CGRP、ET,改善血管内皮功能、心肌损伤、心室重构及心功能,进而可提高疗效,且具有良好的安全性。

血清IGFBP-1、IGFBP-7与SiewertⅡ、Ⅲ型食管胃结合部腺癌患者临床病理参数和预后的关系

目的分析血清胰岛素生长因子结合蛋白(IGFBP)-1、IGFBP-7与SiewertⅡ、Ⅲ型食管胃结合部腺癌(AEG)患者临床病理参数和预后的关系。方法选取2019年1月至2020年11月山东省聊城市第二人民医院收治的264例SiewertⅡ、Ⅲ型AEG患者作为AEG组,另选取同期在山东省聊城市第二人民医院体检中心体检的112例健康志愿者作为对照组。检测所有研究对象的血清IGFBP-1、IGFBP-7水平并统计AEG患者的临床病理参数。随访患者3年生存情况,根据生存情况将患者分为死亡组和存活组。以IGFBP-1、IGFBP-7的均值界限将患者分为高水平IGFBP-1组、低水平IGFBP-1组、高水平IGFBP-7组、低水平IGFBP-7组。采用Kaplan-Meier生存曲线分析IGFBP-1、IGFBP-7水平与SiewertⅡ、Ⅲ型AEG患者预后的关系。采用多因素Logistic回归分析SiewertⅡ、Ⅲ型AEG患者死亡的危险因素。绘制受试者工作特征(ROC)曲线分析血清IGFBP-1、IGFBP-7对SiewertⅡ、Ⅲ型AEG患者死亡的预测价值。结果AEG组血清IGFBP-1、IGFBP-7水平低于对照组,差异均有统计学意义(P<0.05)。肿瘤最大径≥4 cm、低中分化患者血清IGFBP-1、IGFBP-7水平分别低于肿瘤最大径<4 cm、高分化患者,差异均有统计学意义(P<0.05)。随访期间死亡75例,存活189例。高水平IGFBP-1组、低水平IGFBP-1组、高水平IGFBP-7组、低水平IGFBP-7组患者分别有129、135、136、128例。低水平IGFBP-1组3年生存率为59.26%,低于高水平IGFBP-1组的81.40%(P=0.017)。低水平IGFBP-7组3年生存率为57.81%,低于高水平IGFBP-7组的81.26%(P=0.011)。死亡组低中分化、淋巴管侵犯、壁外血管侵犯患者比例高于存活组,血清IGFBP-1、IGFBP-7水平低于存活组,差异均有统计学意义(P<0.05)。多因素Logistic回归分析结果显示,低中分化程度、淋巴管侵犯、IGFBP-1水平降低、IGFBP-7水平降低是SiewertⅡ、Ⅲ型AEG患者死亡的危险因素(P<0.05)。ROC曲线分析结果显示,IGFBP-1、IGFBP-7单独及2项指标联合预测SiewertⅡ、Ⅲ型AEG患者死亡的曲线下面积分别为0.741、0.722、0.786。结论SiewertⅡ、Ⅲ型AEG患者血清IGFBP-1、IGFBP-7水平显著降低,与肿瘤最大径、分化程度有关。低水平IGFBP-1、IGFBP-7与SiewertⅡ、Ⅲ型AEG患者死亡有关。血清IGFBP-1联合IGFBP-7对SiewertⅡ、Ⅲ型AEG患者死亡的预测价值较高。

尿TIMP-2与IGFBP7的乘积对重症急性胰腺炎相关性急性肾损伤的早期预测价值

目的探究尿基质金属蛋白酶抑制因子-2(TIMP-2)与胰岛素样生长因子结合蛋白7(IGFBP7)的乘积对重症急性胰腺炎(SAP)相关性急性肾损伤(AKI)的早期预测价值。方法选取2018年3月至2021年3月新乡医学院第一附属医院收治的93例SAP患者为研究对象,根据患者是否发生AKI分为AKI组(26例)和非AKI组(67例)。采用酶联免疫吸附法(ELISA)检测患者尿液中TIMP-2和IGFBP7水平;采用多因素logistic回归分析影响SAP患者发生AKI的危险因素;通过受试者工作特征(ROC)曲线分析SAP患者急性胰腺炎严重程度床边指数(Bisap)评分、尿液中TIMP-2与IGFBP7的乘积对发生AKI的预测价值。结果与非AKI组相比,AKI组患者Bisap评分、D-二聚体、降钙素原(PCT)、超敏C反应蛋白(hs-CRP)、TIMP-2与IGFBP7的乘积均上升,血钙水平降低(P<0.05)。AKI患者尿液TIMP-2与IGFBP7的乘积随AKI分级增加而上升(P<0.05)。Pearson相关性分析结果显示,AKI患者尿液TIMP-2与IGFBP7的乘积与Bisap评分、D-二聚体、PCT、hs-CRP均呈正相关(P<0.05),与血钙呈负相关(P<0.05)。多因素logistic回归分析结果显示,Bisap评分、TIMP-2与IGFBP7的乘积是影响SAP相关性AKI发生的危险因素(P<0.05)。ROC曲线分析结果显示,尿液TIMP-2与IGFBP7的乘积预测SAP患者发生AKI的曲线下面积(AUC)为0.923,高于Bisap评分预测的AUC(P<0.05)。结论SAP相关性AKI患者尿TIMP-2与IGFBP7的乘积异常升高,其高水平是SAP患者发生AKI的危险因素,且对发生AKI具有一定的预测价值。

TIMP-2和IGFBP-7早期预测急性肾损伤作用机制的研究进展

严重感染、缺血缺氧等导致急性肾损伤,使肾脏血管受损、肾小管中炎症细胞和促炎性细胞因子释放增多、糖酵解过程触发并上调。其中炎症细胞增多和血管受损导致小分子核糖核苷酸表达减少,从而上调小管上皮细胞中基质金属蛋白酶。金属蛋白酶组织抑制因子-2(TIMP-2)可广泛抑制基质金属蛋白酶活性(优先与基质金属蛋白酶2结合),为恢复两者的动态平衡,TIMP-2表达增多,同时促炎性细胞因子可直接使小管上皮细胞分泌TIMP-2。转化生长因子β1参与急性肾损伤时胰岛素样生长因子结合蛋白-7(IGFBP-7)增多的过程。IGFBP-7可延长胰岛素、胰岛素样生长因子1半衰期,促进其与受体结合,延长相关通路的激活,并催化酪氨酸蛋白激酶活性,使磷酸果糖激酶活性提高,最终引起急性肾损伤肾小管上皮细胞中糖酵解过程激活、通量增多。TIMP-2与IGFBP-7能加重细胞周期停滞,可作为急性肾损伤细胞周期停滞的标志物。

重度烧伤患者入院时尿[TIMP-2]×[IGFBP7]水平与早期肾损伤的关系

目的 探讨重度烧伤患者入院时尿组织金属蛋白酶抑制剂-2[TIMP-2]×胰岛素样生长因子结合蛋白7[IGFBP7]水平与早期肾损伤的关系。方法 选取2018年11月—2022年6月本院收治的77例重度烧伤患者设为重度组、77例轻中度烧伤患者设为轻中度组,另选取同期77例体检正常者为正常组。比较3组尿[TIMP-2]×[IGFBP7]水平及血清胱抑素C(CysC)水平。根据重度烧伤患者在住院期间是否发生肾早期损伤分为非肾损伤组(45例)和肾损伤组(32例),比较非肾损伤组、肾损伤组重度烧伤患者尿[TIMP-2]×[IGFBP7]水平及血清CysC水平。分析入院时尿[TIMP-2]×[IGFBP7]、血清CysC对重度烧伤患者并发肾损伤的预测价值。结果 重度组烧伤患者尿[TIMP-2]×[IGFBP7]水平及血清CysC水平高于正常组、轻中度组(P<0.05),轻中度组烧伤患者尿[TIMP-2]×[IGFBP7]水平及血清CysC水平高于正常组(P<0.05)。肾损伤组重度烧伤患者尿[TIMP-2]×[IGFBP7]、血清CysC水平高于非肾损伤组(P<0.05)。入院时尿[TIMP-2]×[IGFBP7]、血清CysC预测重度烧伤患者并发肾损伤的AUC分别为0.873、0.699,截断值分别为1.06 [(ng/mL)^(2)/1000]、5.52 mmol/L,灵敏度分别为84.4%、59.4%,特异度分别为89.9%,73.3%。结论 发生早期肾损伤的重度烧伤患者入院时尿[TIMP-2]×[IGFBP7]水平及血清CysC水平较高,[TIMP-2]×[IGFBP7]水平或可成为预测重度烧伤患者并发肾损伤的潜在指标,为临床评估重度烧伤并发肾损伤提供参考。

血清penKid、IGFBP7对重度烧伤患者急性肾损伤的预测价值

目的研究重度烧伤患者血清脑啡肽原A 119-159(penKid)、胰岛素样生长因子结合蛋白7(IGFBP7)水平及对急性肾损伤(AKI)的预测价值。方法选取2019年4月—2022年4月长治医学院附属和平医院急诊科收治重度烧伤患者98例为烧伤组,根据是否发生AKI分为AKI亚组(n=30)与非AKI亚组(n=68),以医院同期体检的健康人60例为健康对照组。采用酶联免疫吸附实验检测患者伤后24 h内血清penKid、IGFBP7水平;多因素Logistic回归分析重度烧伤患者AKI发生的影响因素;受试者工作特征曲线评价血清penKid、IGFBP7及二者联合预测重度烧伤患者AKI发生的价值。结果烧伤组血清penKid、IGFBP7水平均高于健康对照组(t/P=36.873/<0.001、35.841/<0.001)。AKI亚组入院24 h内急性生理学与慢性健康状况评价Ⅱ(APACHEⅡ)评分、序贯器官衰竭(SOFA)评分、血肌酐、penKid、IGFBP7均高于非AKI亚组(t/P=4.405/<0.001、14.070/<0.001、12.055/<0.001、8.939/<0.001、7.827/<0.001)。随着重度烧伤患者AKI分期升高,血清penKid、IGFBP7依次升高(F/P=11.922/<0.001、17.381/<0.001)。SOFA评分、APACHEⅡ评分、血肌酐、血清penKid、IGFBP7升高是影响重度烧伤患者AKI发生的独立危险因素[OR(95%CI)=1.605(1.168~2.205)、1.765(1.233~2.526)、1.859(1.317~2.625)、1.602(1.268~2.022)、1.594(1.252~2.028)]。血清penKid、IGFBP7及二者联合预测重度烧伤发生AKI的曲线下面积(AUC)分别为0.804、0.840、0.890,二者联合预测重度烧伤患者的AUC高于单项检测(Z=4.348、3.847,P均<0.001)。结论重度烧伤患者血清penKid、IGFBP7水平升高是影响AKI发生的独立影响因素,二者联合对重度烧伤患者AKI的发生具有较高的预测价值。

IGFBP7和CaN异常表达预测射血保留型心力衰竭合并心房颤动患者左心房纤维化程度和形变功能的研究

目的探究胰岛素样生长因子结合蛋白7(IGFBP7)和钙调神经磷酸酶(CaN)异常表达对射血保留型心力衰竭(HFpEF)合并心房颤动(AF)患者左心房纤维化程度和形变功能的预测价值。方法选取邢台市中心医院收治的HFpEF患者180例,根据是否合并AF分为单纯HFpEF组(n=94)及合并组(n=86),同时选取同期健康体检人群为对照组(n=80)。比较三组受试者左心房纤维化程度和形变功能、IGFBP7及CaN水平,并采用多元logistic回归分析影响HFpEF合并AF的危险因素,Spearman相关性分析血清IGFBP7和CaN水平与左心房纤维化程度和形变功能的相关性,受试者工作特征曲线(ROC曲线)分析IGFBP7和CaN水平对HFpEF合并AF的预测价值。结果HFpEF患者左心房收缩期整体峰值纵向应变值(LAS-a)、左心室收缩期左心房整体峰值纵向应变值(LAS-s)、左心房整体总排空分数(LATEF)显著低于对照组[(35.02±4.03)比(38.86±3.89),(15.03±2.31)比(18.74±2.96),(41.87±9.46)比(51.98±9.87),P<0.05],且合并组显著低于单纯HFpEF组[(30.89±2.94)比(35.02±4.03),(11.89±3.16)比(15.03±2.31),(34.24±8.21)比(41.87±9.46),P<0.05];左心房内径(LAD)、二尖瓣口舒张早期峰值血流速度/左心室舒张早期室间隔侧二尖瓣环根部运动峰值速度(E/e′)、左心房容积指数(LAVI)、心肌做功指数(Tei指数)显著高于对照组[(40.68±5.89)比(33.72±4.52),(10.09±1.87)比(7.62±1.45),(24.86±4.78)比(21.32±4.04),(24.86±4.78)比(21.32±4.04),(0.42±0.08)比(0.38±0.08),P<0.05],且合并组显著高于单纯HFpEF组[(44.72±6.02)比(40.68±5.89),(11.32±2.46)比(10.09±1.87),(28.67±5.01)比(24.86±4.78),(0.45±0.06)比(0.42±0.08),P<0.05]。HFpEF患者IGFBP7、CaN水平显著高于对照组(P<0.05),且合并组显著高于单纯HFpEF组(P<0.05)。多因素logistic回归分析结果显示,IGFBP7、CaN、LAS-a、LAS-s、LAD、E/e′、LAVI、Tei指数、年龄是影响HFpEF合并AF的危险因素(P<0.05)。Spearman相关性分析表明,IGFBP7、CaN水平与LAS-a、LAS-s、LATEF呈明显的负相关(r=-0.512、-0.486,-0.508、-0.423,-0.326、-0.428,P<0.05),与LAD、E/e′、LAVI、Tei指数、年龄呈明显的正相关(r=0.328、0.289,0.218、0.321,0.238、0.264,0.208、0.142,0.482、0.358,P<0.05)。ROC曲线分析显示,IGFBP7和CaN水平预测HFpEF合并AF的曲线下面积分别为0.903、0.999(P<0.001),最佳截点分别为24.04、0.42 ng/ml,敏感度分别为82.6%、98.8%,特异度分别为87.2%、99.7%。结论IGFBP7和CaN的异常表达可能与HFpEF合并AF患者左心房纤维化程度和左心房形变功能有关,其可作为HFpEF合并AF的预测指标。

多发性骨髓瘤肾功能不全患者血清PCPE1、IGFBP7水平及临床意义研究

目的分析多发性骨髓瘤(MM)肾功能不全患者血清前胶原C端蛋白酶增强子1(PCPE1)、胰岛素样生长因子结合蛋白7(IGFBP7)水平的变化,并探讨其临床意义。方法回顾性选取2019年2月至2021年2月苏州大学附属常熟医院收治的MM患者116例,检测患者血清PCPE1、IGFBP7水平和肾功能指标。根据患者肾功能分为肾功能不全组42例和肾功能正常组74例。比较两组患者肾功能指标和血清PCPE1、IGFBP7水平;分析MM肾功能不全患者血清PCPE1、IGFBP7水平与肾功能指标的相关性;分析MM患者肾功能不全的危险因素;分析血清PCPE1、IGFBP7对MM患者肾功能不全的预测效能。结果肾功能不全组患者血肌酐、血尿素氮、血尿酸、胱抑素C及血清PCPE1、IGFBP7水平均高于肾功能正常组(均P<0.05),估计的肾小球滤过率(eGFR)低于肾功能正常组(P<0.05)。MM肾功能不全患者血清PCPE1、IGFBP7水平与eGFR均呈负相关(均P<0.05),与血肌酐、血尿素氮、血尿酸及胱抑素C水平均呈正相关(均P<0.05)。高血清PCPE1水平、高血清IGFBP7水平均是MM患者发生肾功能不全的独立危险因素(均P<0.05)。ROC曲线分析显示,血清PCPE1、IGFBP7预测MM患者肾功能不全的AUC分别为0.833、0.806,最佳截断值分别为12.69、163.81μg/L,灵敏度分别为0.752、0.664,特异度分别为0.821、0.823,均有较高的预测效能;而血清PCPE1、IGFBP7联合预测MM患者肾功能不全的AUC高于单独指标预测(均P<0.05),预测效能更高。结论MM肾功能不全患者血清PCPE1、IGFBP7水平升高,且与肾功能不全程度有关,两者联合对MM患者肾功能不全有较高的预测效能。

血清N末端B型利钠肽原和胰岛素样生长因子结合蛋白7及热休克蛋白47联合检测在慢性心力衰竭患者诊断中的应用价值分析

目的探讨血清N末端B型利钠肽原(NT-pro BNP)、胰岛素样生长因子结合蛋白7(IGFBP7)、热休克蛋白47(HSP47)联合检测在慢性心力衰竭(CHF)患者诊断中的应用价值分析。方法选取2021年12月至2023年12月唐山中心医院收治的CHF患者(n=106)为CHF组,另选取同期在本院健康体检者(n=106)为对照组。采用酶联免疫吸附测定法(ELISA)测定两组血清NT-pro BNP、IGFBP7、HSP47表达水平,多因素logistic回归分析影响CHF发生的因素,受试者工作特征(ROC)曲线分析其对CHF患者的诊断价值。结果CHF组血清NT-pro BNP、IGFBP7、HSP47水平与对照组相比,明显升高(t=0.960、8.047、11.196,P<0.05)。血清NT-pro BNP、IGFBP7、HSP47三者联合诊断CHF的AUC最高,高于单独检测(Z_(三者联合-NT-pro BNP)=3.847、P=0.001,Z_(三者联合)-IGFBP7=4.672、P<0.001,Z_(三者联合-HSP47)=2.101、P=0.036)。多因素logistic结果显示,血清NT-pro BNP、IGFBP7、HSP47水平是影响CHF的危险因素(P<0.05),左心室射血分数(LVEF)是影响CHF的保护因素(P<0.05)。结论CHF患者血清中NT-pro BNP、IGFBP7、HSP47表达水平升高,三者联合诊断CHF的效能最好。

急性心力衰竭患者血清胰岛素样生长因子结合蛋白-7、沉默信息调节因子4表达水平及意义

目的 探讨胰岛素样生长因子结合蛋白-7(IGFBP-7)、沉默信息调节因子4(SIRT4)在急性心力衰竭(AHF)患者血清中的表达水平及其对预后的预测价值。方法 选取151例AHF患者(AHF组)和151例健康体检者(对照组)作为研究对象,检测并比较2组血清IGFBP-7、SIRT4、N-末端钠尿肽前体(NT-proBNP)和活性氧(ROS)水平。分析血清IGFBP-7、SIRT4、NT-proBNP、ROS水平与病情分级的关系;采用Pearson相关系数法分析IGFBP-7、SIRT4与NT-proBNP、ROS的相关性;采用多因素Logistic回归分析法分析AHF患者预后的影响因素。绘制受试者工作特征(ROC)曲线,分析血清IGFBP-7、SIRT4对AHF患者预后不良的预测效能。结果 AHF组血清IGFBP-7、SIRT4、NT-proBNP和ROS水平均高于对照组,差异有统计学意义(P<0.05);AHF组患者中,病情分级Ⅳ级者血清IGFBP-7、SIRT4、NT-proBNP和ROS水平高于Ⅲ级者和Ⅱ级者,且Ⅲ级者高于Ⅱ级者,差异有统计学意义(P<0.05);AHF组预后不良者病情分级和血清IGFBP-7、SIRT4、NT-proBNP、ROS表达水平均高于预后良好者,差异有统计学意义(P<0.05)。AHF患者血清IGFBP-7、SIRT4水平均分别与血清NT-proBNP、ROS水平呈正相关(r=0.523、0.498、0.578、0.557,P<0.05)。多因素Logistic回归分析显示,病情分级和血清IGFBP-7、SIRT4、NT-proBNP、ROS水平均为AHF患者预后的独立影响因素(P<0.05)。ROC曲线显示,血清IGFBP-7、SIRT4对AHF患者预后均有一定预测价值,曲线下面积(AUC)分别为0.794、0.795,且两者与ROS联用的预测价值更高,AUC为0.909(95%CI:0.858~0.959)。结论 IGFBP-7、SIRT4在AHF患者血清中呈高表达,且其表达水平与患者病情分级和预后显著相关,两者联合检测对患者预后具有较高的预测价值。