增龄对阴茎海绵体组织胰岛素样生长因子-1表达的影响

目的 探讨年龄对大鼠阴茎海绵体组织中胰岛素样生长因子-1 (IGF-1)表达的影响,探讨老年性ED的可能机制.方法 实时定量PCR检测IGF-1在青年组(n=10)和老龄组(n=10)大鼠阴茎海绵体组织中mRNA的表达,免疫组织化学染色检测IGF -1蛋白的表达和定位.结果 免疫组织化学染色IGF-1在阴茎海绵体内皮细胞和平滑肌细胞表达,与青年组比较,老龄组大鼠IGF-1明显降低(P＜0.05).结论 年龄是影响IGF-1表达水平的因素之一,IGF-1的低表达可能与老年性ED的发生有关.     

IGF-1基因治疗提高老龄大鼠阴茎海绵体平滑肌密度的研究

目的 观察阴茎海绵体内注射胰岛素样生长因子-1 (IGF-1)基因能否提高老年性大鼠阴茎勃起功能及其对阴茎海绵体平滑肌密度的影响,以探讨IGF-1基因治疗ED的机制.方法 4月龄SD雄性大鼠(青年组)10只;24月龄SD雄性大鼠(老龄组)20只,随机分为2组:PBS对照组、100 μg IGF-1质粒注射组.每组10只注射后8周行电刺激检测大鼠阴茎海绵体内压(ICP)和平均动脉压(MAP),分析比较IGF-1基因治疗的效果,Masson,s三色染色图文定量分析阴茎海绵体平滑肌在海绵体组织中含量的变化.结果 电刺激发现老龄组较青年组ICP/MAP和总ICP明显降低(P＜0.05).IGF-1基因治疗8周后,100 μg IGF-1质粒注射组较PBS对照组ICP/MAP和total ICP均明显提高(P＜0.05);阴茎海绵体平滑肌的含量在老龄组较青年组明显降低(P＜ 0.05);与PBS对照组比较,100μg IGF-1质粒注射组能够明显提高阴茎海绵体平滑肌的含量(P＜0.05).结论 I GF-1基因治疗能够改善老龄大鼠的勃起功能,其作用机制之一可能是通过提高阴茎海绵体平滑肌的含量.     

老年髋部骨折局部胰岛素样生长因子及其结合蛋白表达的研究

目的 研究不同类型老年女性髋部骨折中局部胰岛素样生长因子1 (IGF-1)及血清胰岛素样生长因子结合蛋白3、4、5(IGF-BP-3、4、5)表达差异.方法 选取年龄大于65岁老年女性髋部骨折46例,比较局部IGF-1及IGFBP-3、4、5蛋白表达差异.结果 股骨粗隆间骨折组粗隆区BMD较股骨颈骨折组低(P ＜0.001),局部蛋白表达只有IGFBP-4存在差异(P=0.004).结论 局部IGF-BP-4表达的差异可能是导致不同类型老年髋部骨折的病理机制之一,但由于IGF-1及其结合蛋白调节机制相当复杂,对于IGF-1及IGFBPs表达机制同骨折类型的关系尚需大量的实验研究进一步证实.     

胰岛素样生长因子Ⅰ对臂丛神经损伤后骨骼肌细胞凋亡的影响

目的研究胰岛素样生长因子Ⅰ(IGF-Ⅰ)抑制臂丛神经损伤后失神经肱二头肌萎缩及其对骨骼肌细胞凋亡的影响.方法采用成年Wister大鼠,建立右侧臂丛神经损伤的动物模型,IGF-Ⅰ治疗组术后于右侧肱二头肌内注射rhIGF-Ⅰ,用量为200mg/kg-1·3d-1,对照组术后于右侧肱二头肌内注射生理盐水.5周后观察比较肱二头肌湿重,采用TUNEL法检测肱二头肌肌细胞的凋亡率.结果IGF-Ⅰ治疗组骨骼肌湿重为(509.4±92.3)mg,肌细胞凋亡率为(28.4±9.5)%;对照组骨骼肌湿重为(461.8±48.1)mg,肌细胞凋亡率为(54.5±12.1)%.经统计学分析均具有非常显著的差异.结论臂丛神经损伤后肱二头肌内局部注射rhIGF-Ⅰ能够有效地减缓其萎缩.rhIGF-Ⅰ抑制失神经肌细胞凋亡是原因之一.     

血红素氧合酶2在去势大鼠阴茎海绵体内的表达

目的:研究去势大鼠阴茎海绵体血红素氧合酶2(HO-2)和内皮型一氧化氮合酶(eNOS)的表达,探讨雄激素与HO-2、eNOS在ED中的作用及相关性。方法:10周龄雄性SD大鼠40只,分为4、8、12周组和正常对照组各10只,实验组采取手术切除双侧睾丸,对照组采取假手术。分别于术后4、8、12周测定大鼠血清睾酮(T)、阴茎海绵体内压(ICP)、平均颈动脉压(MAP),取阴茎标本,采用Western印迹分析阴茎海绵体HO-2含量,免疫组化分析HO-2和eNOS的表达。结果:去势各组血清T水平较正常对照组显著下降(P<0.05)。经3V、5V电压刺激后去势各组ICP/MAP值明显下降(P<0.05)。HO-2在正常和去势大鼠阴茎海绵体组织均有表达,去势4周组HO-2光密度分布曲线下面积(341.50±99.70)较正常组(876±443.36)和去势8周组(705.00±152.74)明显下降(P<0.05),去势8周与正常组之间无显著变化(P>0.05),去势12周没有检测到HO-2的表达。eNOS主要表达于阴茎海绵体血管内皮细胞,去势组eNOS(123.94±30.23)较正常组(421.21±125.12)差异有显著性(P<0.05)。T与eNOS和HO-2表达呈高度正相关(r=0.976、0.946,P均<0.05)。结论:雄激素可能通过影响大鼠阴茎海绵体HO-2、eNOS的表达参与阴茎勃起功能调控。     

不同配方肠外营养对肝硬化大鼠生长激素/胰岛素样生长因子-1轴的影响

目的探讨不同配方肠外营养对肝硬化大鼠肝部分切除术后生长激素/胰岛素样生长因子-1轴的影响。方法正常大鼠作为对照组,肝硬化大鼠随机分为肝硬化术前组,肝硬化肝部分切除术后1 d组,术后行Novamin肠外营养5 d组,术后行Hepa肠外营养5 d组,各组n=6。测大鼠肝功能、血糖及血清GHI、GF-1I、GFBP-3水平,用RT-PCR法检测肝ALBmRNAI、GF-1 mRNA、IG-FBP-3mRNA的表达,肝组织行Ki67免疫组化染色。结果Hepa组肠外营养5 d后血清ALT、ALP、GH分别为(103±23)IU/L(、571±92)IU/L、(1.55±0.12)ng/ml,均比Novamin组明显降低,而血清IGF-1I、GFPB-3分别为(966.4±54.7)ng/ml(、6.9±0.2)ng/ml,均明显升高,肝ALBmRNA、IGF-1mRNAI、GFBP-3mRNA表达水平分别为(1.24±0.06)、(0.85±0.00)、(0.69±0.02),也明显升高,但肝Ki67指数(4.8%±0.3%vs 4.4%±0.4%)却无显著性差异。血清IGF-1I、GFPB-3与血清AST、ALT、ALP水平呈负相关,与血清ALB呈正相关。结论肝硬化大鼠不同配方肠外营养均可反映在生长激素/胰岛素样生长因子-1轴的变化,检测血清IGF-1,IGFBP-3水平有助于营养素的选择。     

转化生长因子-β1基因和胰岛素样生长因子1基因联合转染治疗兔膝骨性关节炎的研究

目的观察重组大鼠转化生长因子(TGF)-β1和胰岛素样生长因子(IGF)-1基因转染兔膝关节后对骨性关节炎(OA)的治疗效果。方法前交叉韧带切断法(ACLT)将新西兰白兔膝关节制成OA模型,分为5组,分别向膝关节内注射转染了不同重组基因的阳性克隆软骨细胞。4 周和8周后,取关节标本进行Mankin’s评分,AB-PAS染色,TGF-β1、IGF-1、Ⅱ型胶原原位杂交和免疫组织化学检测,透射电镜观察。结果手术对照组软骨损伤程度较大,其Mankin’s评分为 9．50±0．96(4周)和12．5±1．71(8周),明显高于空白对照组(P<0．01)和TGF—β1基因转染组、双基因转染组(P<0．05);各因子原位杂交和免疫组织化学染色,空白对照组(P<0．01)及TGF-β1 基因转染组、双基因转染组(P<0．05)的灰度值高于手术对照组;双基因转染组的灰度值较单基因转染组高(P<0．05);8周时各对应组灰度值较4周有明显下降(P<0．05);透射电镜观察显示,手术对照组的超微结构较空白对照组明显紊乱,经基因治疗4周后,超微结构逐渐恢复正常,但在8 周后,其紊乱程度又逐渐加重。结论关节内注射转基因软骨细胞对OA有一定治疗作用;TGF-β1 和IGF-1双基因的治疗效果优于单基因;基因治疗4周后,基因表达逐渐减弱,基因治疗具有时效性。     

胰岛素样生长因子Ⅰ对臂丛神经损伤后骨骼肌细胞凋亡的影响

目的:研究胰岛素样生长因子Ⅰ(IGF-Ⅰ)抑制臂丛神经损伤后失神经肱二头肌萎缩及其对骨骼肌细胞凋亡的影响。方法:采用成年Wister大鼠,建立右侧臂丛神经损伤的动物模型,IGF-Ⅰ治疗组:术后于右侧肱二头肌内注射rh IGF-Ⅰ,用量为200mg/kg~(-1)·3d~(-1),对照组:术后于右侧肱二头肌内注射生理盐水。5周后观察比较肱二头肌湿重,采用TUNEL法检测肱二头肌肌细胞的凋亡率。结果:IGF-Ⅰ治疗组骨骼肌湿重为(509.4±92.3)mg,肌细胞凋亡率为(28.4±9.5)％;对照组骨骼肌湿重为(461.8±48.1)mg,肌细胞凋亡率为(54.5±12.1)％。经统计学分析均具有非常显著的差异。结论:臂丛神经损伤后肱二头肌内局部注射rh IGF-Ⅰ能够有效地减缓其萎缩。rhIGF-Ⅰ抑制失神经肌细胞凋亡是原因之一。     

靶向IGF-1R的siRNA表达载体的构建及其对肺癌细胞的促凋亡作用

目的构建IGF-1R的siRNA表达载体，并观察其在人肺腺癌A549中对IGF-1R表达抑制及诱导细胞凋亡的作用。方法设计并构建了pENTR／U6-shRNA-1和pENTR／U6-shRNA-2，同时设计并构建了pENTR／U6-shRNA—luc作为对照，转染A549细胞，48h后检测IGF-1R表达及分析细胞凋亡情况。结果相对于对照组，pENTR／U6-shRNA-1和pENTR／U6-shRNA-2转染组IGF-IR mRNA的表达量分别为（22．1±2．5）％和（80．1±3．9）％，蛋白的表达分别为（15．2±3．1）％和（47．1±4．1）％，组间差异具有统计学意义（P〈0．05）。pENTR／U6-shRNA-1转染组抑制了Akt的磷酸化，增加了3％乙醇诱导的细胞凋亡作用，并使77．5％细胞停留在G0／G1期。结论IGF-1R的siRNA表达载体能有效地抑制IGF-1R的表达和诱导细胞凋亡。     

胰岛素样生长因子-Ⅰ促进体外组织工程软骨形成

目的　探讨胰岛素样生长因子 - (IGF- )体外促进以透明质酸 (HA)为支架材料的组织工程软骨形成的能力。　方法　分离培养人关节软骨细胞 ,分为 3组 :1IGF- 组 :HA支架材料 软骨细胞 IGF- ;2细胞组 :HA支架材料 软骨细胞 ;3对照组 :单纯 HA支架材料。各组在 DMEM中培养 ,3、6周停止培养 ,取组织块通过 HE染色判断培养组织的形态 ,采用甲苯胺蓝染色、 型胶原免疫组织化学及 、 型胶原 RT- PCR判断体外组织形成软骨的能力。　结果　 IGF- 组和细胞组在第 6周均能形成典型的软骨组织陷窝 ,细胞组的陷窝数量明显低于 IGF- 组 ;对照组不能形成软骨组织。 型胶原免疫组织化学示 IGF- 组阳性表达强于细胞组 ;RT- PCR示 IGF- 组的 型前胶原量明显高于细胞组 (P<0 .0 5 ) ,而 型前胶原的表达量明显低于细胞组 (P<0 .0 5 ) ,差异具有统计学意义。　结论　 IGF- 能促进体外构建的组织工程软骨形成 ,并提高其质量。     

Serum levels of insulin-like growth factor-1 and insulin-like growth factor-1 binding proteins after radical prostatectomy

PURPOSE: Elevated serum levels of insulin-like growth factor-1 (IGF-1) have been consistently shown to be a risk factor for prostate cancer. Alterations in serum IGF-1 binding proteins 1 to 3 have also been associated with prostate cancer risk. A potentially important complication in these studies is that prostate tissue, perhaps especially malignant prostate tissue, may secrete IGF-1 and its binding proteins into serum. In fact, it is possible that altered levels of these proteins observed in subjects at risk for prostate cancer are the result of prostate cancer rather than related to its cause. MATERIALS AND METHODS: The contribution of prostate cancer to serum levels of IGF-1 and IGF-1 binding proteins was determined by analyzing serum samples from 86 patients with prostate cancer 2 weeks before and 8 weeks after radical prostatectomy. Preoperative and postoperative values for IGF-1 and its 3 major binding proteins were analyzed using univariate and multivariate analysis models. RESULTS: On univariate analysis significant increases and not decreases in IGF-1, IGF binding protein-1 and 3 were observed after prostatectomy. On multivariate analysis a significant post-prostatectomy increase was observed for IGF-1 binding proteins 1 and 3 but the increase in IGF-1 was not significant. CONCLUSIONS: Increased levels of IGF-1 and IGF-1 binding proteins were unexpected after prostatectomy. This result makes it extremely unlikely that secretion from the prostate, even if it contains cancer, affects serum levels of these proteins. The implication of these findings is that endocrine production of IGF-1 is a factor in prostate cancer risk. Therefore, strategies to lower serum IGF-1 may be potentially useful.     

Regulation of cartilage growth by growth hormone and insulin-like growth factor I

A number of studies have shown that growth hormone (GH) and insulin-like growth factor-I (IGF-I) have important regulatory roles for skeletal growth. However, it has been a matter of controversy whether GH acts directly on cells in the growth plate or if the growth-promoting effects of GH are mediated by liver-derived (endocrine-acting) IGF-I. With the recognition that GH regulates the production of IGF-I in multiple extra-hepatic tissues, autocrine and paracrine functions of IGF-I have been suggested as important components of GH action. This review focuses on recent developments in our understanding of the cellular mechanisms by which GH promotes longitudinal bone growth and the inter-relationship between GH and IGF-I in the growth plate.     

Compensatory renal growth: role of growth hormone and insulin-like growth factor-I

Recent experimental evidence suggests that insulin-like growth factor-I (IGF-I) may be involved in compensatory renal growth (CRG). This study was designed to determine the relative contribution of IGF-I and growth hormone (GH) to the CRG that takes place in rats following uninephrectomy (UNx). We also studied the respective role of GH and IGF-I in the stimulation of CRG induced by a high protein diet (HPD). CRG was studied 7 days after UNx in Wistar rats and in a new mutant strain of dwarf rats, selectively deficient in GH. Prior to UNx, rats of both strains were pre-fed (14 days) either a medium-protein diet (MPD, casein 18%) or a HPD (54%). On MPD, CRG was comparable in Wistar (17.6 +/- 3.1%, M +/- SD) and dwarf (14.4 +/- 4.8%) rats. The HPD enhanced CRG in the Wistars (27 +/- 3.9%, P less than 0.005) but not in the dwarfs (14.9 +/- 2%). CRG in both experimental groups involved renal hypertrophy and hyperplasia. Control (baseline) serum, liver and kidney IGF-I were significantly less in dwarf rats. However, following UNx, on a MPD, kidney IGF-I increased significantly in both Wistar and dwarf rats: Wistar, pre-UNx, 310 +/- 46 ng/g tissue; post-UNx, 405 +/- 54 ng/g, P less than 0.005; dwarfs, pre-UNx, 205 +/- 35 ng/g; post-UNx 426 +/- 90 ng/g, P less than 0.001. On a HPD a further significant increase in renal IGF-I was only observed in Wistar rats (505 +/- 46 ng/g). No change in serum or liver IGF-I was observed after UNx in either strain.(ABSTRACT TRUNCATED AT 250 WORDS)     

Serum insulin-like growth factor-I and insulin-like growth factor binding protein-3 following chemotherapy for advanced breast cancer

Background: Insulin‐like growth factor‐I (IGF‐I) and IGF binding protein‐3 (IGFBP‐3) appear to influence the growth of breast cancer cells in vitro, and epidemiological studies suggest higher serum IGF‐I levels increase the risk of breast cancer. IGF‐I and IGFBP‐3 have therefore been measured in women with advanced breast cancer to determine if changes in serum levels predict the response to treatment by chemotherapy. Methods: Serum IGF‐I and IGFBP‐3 levels were measured in 14 patients before and after 1 week of chemotherapy. Changes in serum levels were compared with duration of survival. Results: Mean basal serum levels of IGF‐I and IGFBP‐3 were not significantly different between patients with advanced breast cancer and controls or women with early breast cancer. Serum IGFBP‐3 fell significantly 1 week after initiation of chemotherapy. Patient survival was not significantly related to baseline IGF‐I or IGFBP‐3 levels, but when the fall in serum levels 1 week after starting treatment was expressed either as absolute change or as a percentage of baseline, those individuals with a decrease in IGFBP‐3 greater than the median had significantly poorer survival (median survival 5.5 months vs 18 months). These results were independent of other prognostic variables such as previous disease‐free survival, and were also unaffected by the change in serum albumin with treatment. The fall in IGF‐I and IGFBP‐3 with chemotherapy mainly occurred in those with hepatic metastases, but prediction of survival was explained solely by the extent of the fall in IGFBP‐3. Conclusions: This preliminary study has shown that serum IGFBP‐3 falls significantly following initiation of chemotherapy and the extent of reduction significantly predicts the response to treatment.     

Differential distribution of insulin-like growth factor-1 and insulin-like growth factor binding proteins in experimental diabetic rat kidney

Insulin-like growth factor-1 (IGF-1) is a peptide growth factor, and its activity is modulated by interaction with the family of IGF binding proteins (IGFBP-1 to 6). IGF-1 is detected in rat kidney and has metabolic and growth effects. To explore the possible involvement of IGFBPs in glomerular hypertrophy in streptozotocin (STZ)-induced diabetic rat, the immunolocalization of IGF-1 and IGFBPs were investigated. IGF-1 was gradually increased in the glomeruli of diabetic rats and correlated with glomerular hypertrophy. IGFBP-1 was transiently increased at 1 week after the STZ injection and declined to control level during the following period. In contrast, IGFBP-4 was increased in the diabetic glomeruli throughout the observation period. With insulin treatment, the levels of IGF-1, IGFBP-1 and 4 were normalized and glomerular hypertrophy was prevented. Initial glomerular hypertrophy of diabetic nephropathy is a related IGF-1 action, which may be modulated by IGFBP-1 and 4.     

Effect of insulin-like growth factor-1 and insulin-like growth factor binding protein-3 complex in cavernous nerve cryoablation

The purpose of this work was to study the effect of insulin-like growth factor 1 (IGF-1) and its binding protein (IGFBP-3) on the recovery of erectile function in a rat model for neurogenic impotence. In all, 28 male Sprague-Dawley rats were divided into four groups: seven underwent a sham operation; seven underwent bilateral cavernous nerve freezing (control group); seven underwent bilateral cavernous nerve freezing followed by intraperitoneal injection of IGF-1; and seven underwent bilateral cavernous nerve freezing followed by intraperitoneal injection of IGFBP-3. Erectile response was assessed by cavernous nerve electrostimulation at 3 months, and samples of penile tissue were evaluated histochemically for nitric oxide synthase (NOS)-containing fibers. In the sham and IGF-1 group, there were significantly higher maximal intracavernous pressures compared to the IGFBP-3 complex and the control group. Correspondingly in the cavernosum, there were significantly more NOS-containing nerve fibers in the sham and IGF-1 groups. In conclusion, administration of IGF-1 can facilitate the regeneration of NOS-containing nerve fibers in penile tissue and enhance the recovery of erectile function after bilateral cavernous nerve cryoablation. The reverse effect was noted with the IGFBP-3 complex injection.     

胰岛素和胰岛素样生长因子及其结合蛋白与结直肠癌发生的关系

目的探讨血清胰岛素、胰岛素样生长因子（IGF-1）、IGF结合蛋白（IGFBPs）体质量指数（BMI）、腰臀围比（WHR）的变化及与结直肠癌发生、发展的关系。方法检测对象为2006年6月至2007年10月间住院收治和门诊复查的结直肠癌患者615例（术前检测244例,术后371例）和健康对照者150例。采用酶联免疫吸附法检测血清胰岛素、IGF-1和IGFBPS水平。结果结直肠癌患者术前血清胰岛素、IGF-1水平和IGF-I／IGFBP-3比值与健康对照组、术后患者比较,均明显升高,IGFBP-3水平明显降低,差异均有统计学意义（P〈0.05,P〈0.01）。结直肠癌术后未发生转移者与有肝或腹腔远处转移者胰岛素、IGF-1、IGFBP-1、IGFBP-3、IGF-1／IGFBP-3比较,差异均无统计学意义（P〉0.05）。结直肠癌患者WHR明显高于健康对照组（P〈0.01和P〈0.05）;而BMI与健康对照组比较,差异无统计学意义（P〉0.05）。结肠癌患者WHR、BMI与胰岛素水平、IGF-1／IGFBP-3比值呈正相关（P〈0.01,P〈0.05）,与IGFBP-3呈负相关（P〈0.01,P〈0.05）;直肠癌患者WHR与血清瘦素、胰岛素水平及BMI与血清IGFBP-1水平均呈正相关（P〈0.05）,与其他无相关性（P〉0.05）。结论胰岛素、IGF-1水平和IGF-I／IGFBP-3比值升高及IGFBP-3水平降低,可能与结直肠癌的发生有关,但与肿瘤转移与否无关,中心性肥胖是结肠癌发生的危险因素之一。     

胰岛素和胰岛素样生长因子及其结合蛋白与结直肠癌发生的关系

目的 探讨血清胰岛素、胰岛素样生长因子(IGF-1)、IGF结合蛋白(IGFBPs)及体质量指数(BMI)、腰臀围比(WHR)的变化及与结直肠癌发生、发展的关系.方法 检测对象为2006年6月至2007年10月间住院收治和门诊复查的结直肠癌患者615例(术前检测244例,术后371例)和健康对照者150例.采用酶联免疫吸附法检测血清胰岛素、IGF-1和IGFBPS水平.结果 结直肠癌患者术前血清胰岛素、IGF-1水平和IGF-Ⅰ/IGFBP-3比值与健康对照组、术后患者比较,均明显升高,IGFBP-3水平明显降低,差异均有统计学意义(P<0.05,P<0.01).结直肠癌术后未发生转移者与有肝或腹腔远处转移者胰岛素、IGF-1、IGFBP-1、IGFBP-3、IGF-1/IGFBP-3比较.差异均无统计学意义(P>0.05).结直肠癌患者WHR明显高于健康对照组(P<0.01和P<0.05):而BMI与健康对照组比较,差异无统计学意义(P>0.05).结肠癌患者WHR、BMI与胰岛素水平、IGF-1/IGFBP-3比值呈正相关(P<0.01,P<0.05),与IGFBP-3呈负相关(P<0.01,P<0.05);直肠癌患者WHR与血清瘦素、胰岛素水平及BMI与血清IGFBP-1水平均呈正相关(P<0.05),与其他无相关性(P>0.05).结论 胰岛素、IGF-1水平和IGF-Ⅰ/IGFBP-3比值升高及IGFBP-3水平降低,可能与结直肠癌的发生有关,但与肿瘤转移与否无关,中心性肥胖是结肠癌发生的危险因素之一.     

胰岛素和胰岛素样生长因子及其结合蛋白与结直肠癌发生的关系

目的 探讨血清胰岛素、胰岛素样生长因子(IGF-1)、IGF结合蛋白(IGFBPs)及体质量指数(BMI)、腰臀围比(WHR)的变化及与结直肠癌发生、发展的关系.方法 检测对象为2006年6月至2007年10月间住院收治和门诊复查的结直肠癌患者615例(术前检测244例,术后371例)和健康对照者150例.采用酶联免疫吸附法检测血清胰岛素、IGF-1和IGFBPS水平.结果 结直肠癌患者术前血清胰岛素、IGF-1水平和IGF-Ⅰ/IGFBP-3比值与健康对照组、术后患者比较,均明显升高,IGFBP-3水平明显降低,差异均有统计学意义(P<0.05,P<0.01).结直肠癌术后未发生转移者与有肝或腹腔远处转移者胰岛素、IGF-1、IGFBP-1、IGFBP-3、IGF-1/IGFBP-3比较.差异均无统计学意义(P>0.05).结直肠癌患者WHR明显高于健康对照组(P<0.01和P<0.05):而BMI与健康对照组比较,差异无统计学意义(P>0.05).结肠癌患者WHR、BMI与胰岛素水平、IGF-1/IGFBP-3比值呈正相关(P<0.01,P<0.05),与IGFBP-3呈负相关(P<0.01,P<0.05);直肠癌患者WHR与血清瘦素、胰岛素水平及BMI与血清IGFBP-1水平均呈正相关(P<0.05),与其他无相关性(P>0.05).结论 胰岛素、IGF-1水平和IGF-Ⅰ/IGFBP-3比值升高及IGFBP-3水平降低,可能与结直肠癌的发生有关,但与肿瘤转移与否无关,中心性肥胖是结肠癌发生的危险因素之一.