Production and Characterization of Recombinant Rat Non-Collagen Domain of α3 Chain of Type IV Collagen α3 (IV) NC1 Antigen

The glomerulonephritis disease is characterized by inflammation of glomeruli or small blood vessels in the kidney that causes kidney diseases. The reason of glomerulonephritis disease is to deposit the anti-GBM auto antibody in the glomerular basement membrane. The type IV collagen is the main component of glomerular basement membrane that has α3 chain of type (IV) collagen of non-collagenous domain which contains N-terminal 7S domain, a triple helical collagenous domain and C-terminal non-collagenous glomerular domain (NC1). The amino terminal of α3 (IV) NC1 that induces the Experimental Autoimmuno Glomerulonephritis (EAG) in rat model has been identified. The recombinant rat α3 (IV) NC1 antigen has nine amino acid spans that are consistent with antibody or T cell epitope that induces in EAG. The research is carried out on the recombinant rat α3 (IV) NC1 production, purification, quantification, and characterization. The circulation of anti-GBM antibody in glomerular basement membrane can be measured by the ELISA assay. In addition, the recombinant rat antigen is secreted in HEK293 cell supernatant that is purified by Anti-FLAG M2 monoclonal IgG antibody affinity column and characterized and quantified by SDS-PAGE gel electrophoresis and Western blotting techniques.

Urinary type IV collagen excretion predicts an increased urinary albumin-to-creatinine ratio in normoalbuminuric patients with diabetes

Aims: We evaluated whether urinary excretion of type IV collagen (U-COL) may predict an increase in the urinary albumin-to-creatinine ratio (ACR) and what factors regulate U-COL in 145 normoalbuminuric patients with type 2 diabetes. Methods: We measured HbA1c, systolic blood pressure (SBP), urinary 8-hydroxydeoxyguanosine (8-OHdG) and monocyte chemoattractant protein (MCP)-1 at start of this study (Baseline), ACR and U-COL in addition to these measurements at one year later (Evaluation-1), and ACR and SBP after two years of the Evaluation-1 (Evaluation-2). The relationships were investigated between the increase of ACR and the U-COL. The effect of angiotensin receptor blockers (ARB) treatment on the correlations between U-COL and ACR at Evaluation-2 on one hand, and between U-COL and percent change of ACR on the other, was also analyzed. Furthermore, we investigated whether the increase in 8-OHdG and in MCP-1 in a year prior to the Evaluation-1 were risk factors of the rise in U-COL levels. Results: Both U-COL and SBP at Evaluation-1, but not ARB treatment, were independent risk factors for an increased ACR after 2 years. ARB treatment significantly suppressed the increase in ACR after 2 years in patients with higher U-COL excretion. The percentage changes in 8-OHdG (%8-OHdG) and MCP-1 (%MCP-1) in one year prior to Evaluation-1 measurements are independent risk factors for U-COL. HbA1c and SBP values one year prior to Evaluation-1 are independent risk factors not only for %8-OHdG but also, for baseline U-COL. The %8-OHdG is an independent risk factor for %MCP-1. Conclusions: U-COL may predict an increase in the ACR. The U-COL seems to be increased with oxidative stress and inflammation induced by past hyperglycemia.

Changes on lysosomal compartment during PMA-induced differentiation of THP-1 monocytic cells: Influence of type I and type IV collagens

In this work, the influence of different substrate adhesion during phorbol-12-myristate-13-acetate (PMA)-induced differentiation of THP-1 monocytic cell line was studied. In particular, by morphocytochemical and cytometric approaches, the influence of type I and type IV collagens in an experimental model representative of three phases (initial, intermediate and terminal) of monocyte-macrophage transition was analyzed. The cells in these three phases of differentiation were obtained by using 6, 30 e 60 nM PMA. In this experimental model, referring to adhesion to glass as control, by using the azo-dye coupling method, we have considered the analysis of Acid Phosphatase (AcP) activity as a marker of differentiated status expression, in relation to the acquisition of macrophagic phenotype. Endosomal/lysosomal system was further characterized by taking into account the uptake of fluorescent probe LysoTracker Red. Fluorochromization in the various experimental conditions was analyzed morphologically (fluorescence microscopy) and quantitatively (static cytometry). Data related to lysosome compartment were integrated, from a cytokinetic point of view, by flow cytometry measurements of DNA/protein content. Our results have indicated that type I and type IV collagens were able to influence, with respect to glass adhesion, various differentiation phases. Type I collagen showed the higher effects in the condition of high differentiation (60 nM PMA), causing an increase in AcP activity and lysosomal system. Type IV collagen, besides determining effects on lysosomal compartment of intermediate and terminally differentiated cells, influenced mainly proliferative activity of cells with initial differentiation level (6 nM PMA).

司美格鲁肽对2型糖尿病合并多囊卵巢综合征患者血清超敏C反应蛋白及IV型胶原蛋白的影响

目的:探讨司美格鲁肽对2型糖尿病(T2DM)合并多囊卵巢综合征(PCOS)患者血清超敏C反应蛋白(hs-CRP)及IV型胶原蛋白(Col IV)的影响。方法:选取30例初诊T2DM合并PCOS患者为研究对象,给予司美格鲁肽治疗16周。分析比较患者治疗前后血糖、血脂、体重、性激素相关指标及hs-CRP和Col IV的变化,并探究司美格鲁肽治疗后hs-CRP与各指标的相关性。结果:治疗16周后,受试者空腹血糖(FBG)、餐后2 h血糖(2hBG)、糖化血红蛋白(HbA1C)、空腹胰岛素(FINS)、胰岛素抵抗指数(HOMA-IR)、腰围(WC)、体质量指数(BMI)、甘油三酯(TG)、胆固醇(TC)、黄体生成素(LH)、LH/FSH、总睾酮(TT)、hs-CRP、Col IV均较治疗前降低,卵泡刺激素(FSH)较治疗前升高,差异均有统计学意义(P<0.05)。司美格鲁肽治疗后hs-CRP与BMI、WBC、HbA1c、FBG、2hBG、FINS、TG、Col IV正相关(P<0.05)。结论:司美格鲁肽既能改善T2DM合并PCOS患者的血糖、血脂、体重、胰岛素抵抗、性激素,也能改善机体的炎症状态及卵巢纤维化,其可能是T2DM合并PCOS患者的潜在治疗靶点。

Type IV collagen α5 chain promotes luminal breast cancer progression through c-Myc-driven glycolysis

Cancer cell metabolism reprogramming is one of the hallmarks of cancer.Cancer cells preferentially utilize aerobic glycolysis,which is regulated by activated oncogenes and the tumor microenvironment.Extracellular matrix(ECM)in the tumor microenvironment,including the basement membranes(BMs),is dynamically remodeled.However,whether and how ECM regulates tumor glycolysis is largely unknown.We show that type IV collagens,components of BMs essential for the tissue integrity and proper function,are differentially expressed in breast cancer subtypes thatα5 chain(α5(IV))is preferentially expressed in the luminal-type breast cancer and is regulated by estrogen receptor-α.α5(IV)is indispensable for luminal breast cancer development.Ablation ofα5(IV)significantly reduces the growth of luminal-type breast cancer cells and impedes the development of luminal-type breast cancer.Impaired cell growth and tumor development capability ofα5(IV)-ablated luminal breast cancer cells is attributed to the reduced expression of glucose transporter and glycolytic enzymes and impaired glycolysis in luminal breast cancer cells.Non-integrin collagen receptor discoidin domain receptor-1(DDR1)expression and p38 mitogen-activated protein kinase activation are attenuated inα5(IV)-ablated luminal breast cancer cells,resulting in reduced c-Myc oncogene expression and phosphorylation.Ectopic expression of constitutively active DDR1 or c-Myc restores the expression of glucose transporter and glycolytic enzymes,and thereafter restores aerobic glycolysis,cell proliferation,and tumor growth of luminal breast cancer.Thus,type IV collagenα5 chain is a luminal-type breast cancer-specific microenvironmental regulator modulating cancer cell metabolism.

Combination of type Ⅳ collagen 7S, albumin concentrations, and platelet count predicts prognosis of non-alcoholic fatty liver disease

BACKGROUND Non-alcoholic fatty liver disease(NAFLD)is the most common cause of chronic liver disease and affects approximately 25%of the general global adult population.The prognosis of NAFLD patients with advanced liver fibrosis is known to be poor.It is difficult to assess disease progression in all patients with NAFLD;thus,it is necessary to identify patients who will show poor prognosis.AIM To investigate the efficacy of non-invasive biomarkers for predicting disease progression in patients with NAFLD.METHODS We investigated biomarkers associated with mortality in patients with NAFLD who visited the Kawasaki Medical School General Medical Center from 1996 to 2018 and underwent liver biopsy and had been followed-up for>1 year.Cumulative overall mortality and liver-related events during follow-up were calculated using the Kaplan-Meier analysis and compared using log-rank testing.We calculated the odds ratio and performed receiver operating characteristic curve analysis with logistic regression analysis to determine the optimal cut-off value with the highest prognostic ability.RESULTS We enrolled 489 patients who were followed-up for a period of 1-22.2 years.In total,13 patients died(2.7%of total patients enrolled);7 patients died due to liverrelated causes.Poor prognosis was associated with liver fibrosis on histological examination but not with inflammation or steatosis.Blood biomarkers associated with mortality were platelet counts,albumin levels,and type IV collagen 7S levels.The optimal cutoff index for predicting total mortality was a platelet count of 15×10^(4)/μL,albumin level of 3.5 g/dL,and type IV collagen 7S level of 5 mg/dL.In particular,only one-factor patients with NAFLD presenting with platelet counts≤15×10^(4)/μL,albumin levels≤3.5 g/dL,or type IV collagen 7S≥5 mg/dL showed 5-year,10-year,and 15-year survival rates of 99.7%,98.3%,and 94%,respectively.However,patients with two factors had lower 5-year and 10-year survival rates of 98%and 43%,respectively.Similarly,patients with all three factors showed the lowest 5-year and 10-year survival rates of 53%and 26%,respectively.CONCLUSION A combination of the three non-invasive biomarkers is a useful predictor of NAFLD prognosis and can help identify patients with NAFLD who are at a high risk of all-cause mortality.

Pre-hepatectomy type Ⅳ collagen 7S predicts post-hepatectomy liver failure and recovery

BACKGROUND Liver resection is an effective treatment for benign and malignant liver tumors.However,a method for preoperative evaluation of hepatic reserve has not yet been established.Previously reported assessments of preoperative hepatic reserve focused only on liver failure in the early postoperative period and did not consider the long-term recovery of hepatic reserve.When determining eligibility for hepatectomy,the underlying pathophysiology needs to be considered to determine if the functional hepatic reserve can withstand both surgery and any postoperative therapy.AIM To identify pre-hepatectomy factors associated with both early postoperative liver failure and long-term postoperative liver function recovery.METHODS This study was a retrospective cohort study.We retrospectively investigated 215 patients who underwent hepatectomy at our hospital between May 2013 and December 2016.Early post-hepatectomy liver failure(PHLF)was defined using the International Study Group of Liver Surgery’s definition of PHLF.Long-term postoperative recovery of liver function was defined as the time taken for serum total bilirubin and albumin levels to return to levels of<2 mg/dL and>2.8 g/dL,respectively,and the time taken for Child-Pugh score to return to Child-Pugh class A.RESULTS Preoperative type IV collagen 7S was identified as a significant independent factor associated with both PHLF and postoperative long-term recovery of liver function.Further analysis revealed that the time taken for the recovery of Child-Pugh scores and serum total bilirubin and albumin levels was significantly shorter in patients with type IV collagen 7S≤6 ng/mL than in those with type IV collagen 7S>6 ng/mL.In additional analyses,similar results were observed in patients without chronic viral hepatitis associated with fibrosis.CONCLUSION Preoperative type IV collagen 7S is a preoperative predictor of PHLF and longterm postoperative liver function recovery.It can also be used in patients without chronic hepatitis virus.

IV型胶原蛋白相关听力损失的研究进展

IV型胶原蛋白是基底膜等组织的重要组成成分,广泛存在于肾脏、耳蜗等人体器官中。相比引起如肾脏等器官的疾病而言,国内外研究对IV型胶原蛋白相关听力损失的关注相对较少。本文旨在总结已报道的部分IV型胶原蛋白亚型与听力损失相关疾病的研究进展,为后续相关研究提供研究方向参考。

Adsorption of ^(117m)Sn(IV)-EDTMP on hydroxyapatite and collagen

Some organic phosphines labeled with ^117mSn(IV) have been proved promising for imaging and pain palliation of bone tumor.In this paper,a preliminary investigation on the adsorption characteristics of EDTMP(ethelenediaminetetramethylene phosphoric acid)labeled with ^117Sn(IV) on HA( hydroxyapatitie)and collagen,and an investigation on the adsorption mechanism of ^117mSn(IV)-EDTMP on HA was presented.

IV型胶原纤维及其酶在胃癌浸润转移中的作用

采用ＩＶ型胶原纤维单抗和ＩＶ型胶原酶多抗检测７６例胃癌。发现ＩＶ型胶原纤维染色所示基底膜明显缺损，在分化较差者及浸润型胃癌中（＞７５％）明显高于分化较好者及膨胀型胃癌（Ｐ＜０．００５）。ＩＶ型胶原酶明显增加在分化较差者，浸润型及有淋巴结转移者（８０％左右）显著高于分化较好者，膨胀型及无淋巴结转移者（Ｐ＜０．０５）。说明分化程度低的胃癌产生更多ＩＶ型胶原酶，严重破坏基底膜，促进浸润和淋巴结转移。其可作为恶性程度指标。

整合素beta1亚单位对肝癌细胞与IV型胶原黏附与趋化行为的影响

采用微吸管实验技术 ,测定肝细胞癌 (Hepatocellular carcinom a,HCC)细胞与 IV型胶原裱衬表面的黏附力 ;进一步加入针对整合素 beta1亚单位 (CD2 9)的单克隆抗体 (Anti- CD2 9)处理 HCC细胞 ,观察 Anti- CD2 9对细胞与 IV型胶原裱衬表面的黏附力的影响。采用双微吸管实验法进行 HCC细胞趋化实验 ,在两侧微管内加入相同浓度 (6 0 0μg/ ml )的 IV型胶原 ,并引导微管尖端与同一细胞紧密接触 ,动态观察细胞两侧伪足形成过程 ;在一侧微吸管内加入 2 0μg/ ml Anti- CD2 9,考察 beta1整合素亚单位阻断对 HCC细胞伪足形成的影响。利用流式细胞仪对 HCC细胞表面整合素 beta1亚单位的表达进行分析。结果表明 ,HCC细胞与 5μg/ ml IV型胶原裱衬表面之间的黏附力为 932± 134(× 10 - 1 0 N ,n=6 0 ) ,加入 5μg/ ml Anti- CD2 9黏附力减小到 4 4 9± 119(× 10 - 1 0 N,n=6 0 ) ;加入 10 μg/ ml Anti- CD2 9时黏附力减小到 2 2 0± 78(× 10 - 1 0 N,n=5 5 )。双微吸管趋化实验表明 :两侧微吸管加入相同浓度 IV型胶原 ,细胞向两侧微吸管均有伪足形成 ;在此基础上 ,微吸管加入 Anti- CD2 9的一侧 ,HCC细胞伪足生长曲线呈现明显的抑制 ,而未加入 Anti- CD2 9的微吸管一侧与加入的对侧相比 ,该侧细胞的伪足明显增?

140例Graves’病患者血清HA、LN、PCⅢ、IV.C含量的临床分析

目的 :应用血清中的HA、LN、PCⅢ、IV .C含量 ,来判断甲状腺功能亢进对肝脏功能的影响。方法 :采用放射免疫法测定 14 0例Graves’病患者和 33例健康体检者的血清HA、LN、PCⅢ、IV .C含量。Graves’病患者分为初诊未用ATD组 ( 5 9例 )和曾用ATD组 ( 81例 )。结果 :血清HA含量未用ATD组 (均数±标准差 119.4 3± 10 7.0 8μg/L)明显高于对照组 ( 78.30±5 8.4 4 μg/L) ,P <0 .0 5 ,而曾用ATD组 ( 10 8.4 9± 6 6 .94 μg/L)与对照组之间无显著性差异 ;血清LN、PCⅢ、IV .C含量在所有的病人均显著高于对照组 ,P <0 .0 0 1,未用ATD组分别为 ( 2 0 3.18± 98.5 5 )、( 2 0 9.0 6± 10 8.6 2 )、( 117.79± 6 3.39) μg/L ,曾用ATD组分别为 ( 190 .0 3± 79.37)、( 172 .36± 10 4 .4 5 )、( 119.0 2± 4 7.38) μg/L ,对照组分别为 ( 130 .88± 15 .12 )、( 74 .5 9± 2 1.87)、( 6 4 .5 6± 2 7.6 4 ) μg/l。 结论 :Graves’病患者无论是否接受过ATD治疗 ,血清LN、PCⅢ、IV .C增高 ;HA在初诊病人升高 ,而接受过ATD治疗的病人正常 ,也许与ATD的免疫调节有关。

癌基因蛋白P^(21)、P^(185)、EGFR及LN、IV型胶原在骨肉瘤中的表达

目的探讨癌基因蛋白ｐ２１、ｐ１８５、ＥＧＦＲ及ＬＮ、ＩＶ型胶原在人骨肉瘤组织中表达的意义。方法应用免疫组化ＡＢＣ法，检测４０例常规石蜡包埋的骨肉瘤组织中ｐ２１、ｐ１８５和ＥＧＦＲ的表达，同时还检测了ＬＮ、ＩＶ型胶原在骨肉瘤组织中的含量。结果ｐ２１、ｐ１８５和ＥＧＦＲ在骨肉瘤组织中的阳性表达率分别为２６３％（１０／３８），６５８％（２５／３８），５００（１９／３８），同时观察到ＬＮ和ＩＶ型胶原在骨肉瘤组织中往往是缺如的。结论骨肉瘤组织中存在着多种癌基因的异常，它们与骨肉瘤的发生发展密切相关，同时细胞外基质的破坏在骨肉瘤的侵袭与转移中起着重要的作用。

带蒂大网膜包肾术对肾小球硬化大鼠肾皮质IV型胶原基因表达的影响

目的 探讨带蒂大网膜包肾术 (POT)对肾小球硬化大鼠肾皮质IV型胶原基因表达的影响。方法采用单侧肾切除加二次注射阿霉素制备肾小球硬化大鼠模型 ,观察带蒂大网膜包肾术对肾小球硬化大鼠肾皮质IV型胶原基因表达的影响。结果 带蒂大网膜包肾术使肾小球硬化大鼠肾皮质IV型胶原基因表达明显上调 ,肾小球硬化减轻。结论 带蒂大网膜包肾术下调肾小球硬化大鼠肾皮质IV型胶原基因表达 。

血清透明质酸、层粘连蛋白及IV型胶原在肝纤维化及肝癌中的变化分析

目的 :研究血清透明质酸 (HA)、层粘连蛋白 (LN)及IV型胶原 (IV -C)水平与肝纤维化及肝癌转移的关系。方法 :应用放射免疫法测定 6 5例慢性病毒性肝炎、10 8例肝炎后肝硬化及 5 1例原发性肝癌患者血清HA、LN及IV -C水平。结果 :肝癌、肝硬化及慢性肝炎患者的血清三项指标均明显高于对照者 ,肝硬化患者的上述指标还明显高于慢性肝炎者 ,其敏感性 (84.9% )及准确性 (79.8% )以HA最高 ,而特异性 (96 .9% )则以三项指标联检最佳。此外 ,伴肝外转移的血清LN及IV -C含量还显著高于无肝外转移者。结论 :血清三项指标基本与慢性肝炎及肝硬化的发展过程相一致 ,可作为反映肝纤维化程度及监测肝癌浸润转移的临床指标。

层粘连蛋白、纤粘连蛋白、IV型胶原在人月经周期子宫内膜中的表达

目的 研究细胞外基质蛋白层粘连蛋白 (LN)、纤粘连蛋白 (FN)和IV型胶原 (IVCL)在正常人月经周期子宫内膜中的表达。 方法 采用免疫组织化学方法检测 4 9例正常月经周期子宫内膜中LN、FN、IVCL蛋白的表达。 结果 LN主要分布于腺上皮及腔上皮基底膜 ,分泌中期表达最强。FN主要分布于间质 ,腔上皮及腺上皮基底膜也均有表达 ,分泌中期含量丰富。IVCL在腺上皮基底膜的表达分泌中期最强 ,在间质的表达分泌早期最强 ,分泌中、晚期表达逐渐减弱。LN、FN、IVCL在血管基底膜上均有表达 ,无周期性变化。 结论 LN、FN、IVCL在月经周期子宫内膜中的表达随月经周期而变化。

水蛭提取液对体外培养RF/6A的细胞液中MMP-2、IV型胶原含量的影响

目的初探水蛭提取液对新生血管生长的作用机制。方法采用酶联免疫法、放射免疫法检测不同时间点水蛭提取液对细胞培养上清液中MMP-2、IV型胶原表达的影响。结果 12 h各组间比较,空白组、水蛭组MMP-2的OD值分别为0.137±0.006、0.136±0.007,表达低于凝血酶组0.165±0.018,组间差异均有统计学意义(均为P<0.05)。空白组12 h的MMP-2含量要低于2 h、6 h,差异均有统计学意义(均为P<0.05);水蛭组2 h时MMP-2的分泌高于6 h、12 h,差异均有统计学意义(均为P<0.05)。2 h时空白组IV型胶原的含量(20.67±1.02)ng·mL-1高于凝血酶组(15.58±3.40)ng·mL-1、合药组(15.75±6.23)ng·mL-1,差异均有统计学意义(均为P<0.05);6 h时水蛭组IV型胶原的含量明显高于其他3组,差异均有统计学意义(均为P<0.05);12 h时观察,空白组IV型胶原的含量(21.33±2.75)ng·mL-1,明显高于合药组(16.49±1.59)ng·mL-1,差异有统计学意义(P<0.05),水蛭组IV型胶原的含量明显高于凝血酶组及合药组,差异有统计学意义(P<0.05)。空白组2 h、12 h IV型胶原的含量均较6 h高,差异均有统计学意义(均为P<0.05);凝血酶组IV型胶原的合成呈增加趋势,12 h与2 h相比,差异有统计学意义(P<0.05);水蛭组IV型胶原的合成明显增加,6 h、12 h IV型胶原的含量显著高于2 h,差异有统计学意义(P<0.05)。结论64 g·L-1水蛭提取液可以促进IV型胶原合成,抑制MMP-2的分泌,对新生血管的形成有抑制作用。

米非司酮对早孕蜕膜组织中IV型胶原及纤维粘连蛋白的影响

目的 :探讨米非司酮 (Ru486 )对早孕蜕膜组织中 IV型胶原、纤维粘连蛋白(FN)的影响 ,进一步认识米非司酮的抗早孕机理。方法 :孕 <6 0 d妇女 ,随机分为对照组和药物组。药物组口服米非司酮总量为 1 5 0 mg。采用免疫组织化学 (ABC)法测定早孕蜕膜组织 IV型胶原 (对照组 1 5例 ,药物组 2 0例 )和纤维粘连蛋白 (对照组 2 5例 ,药物组 30例 )的分布状况。结果 :与对照组相比 ,药物组早孕蜕膜组织中 IV型胶原、FN均明显减少(P<0 .0 1 ,P<0 .0 5 )。尤其是 IV型胶原在腺体基膜 ,FN在蜕膜细胞间质中降低最为明显 (P<0 .0 1 ) ,上皮基膜、血管周围 IV型胶原含量也明显降低 (P<0 .0 5 )。结论 :米非司酮明显影响早孕蜕膜组织中这两种细胞外基质 (ECM)的含量及分布 ,可使 IV型胶原、FN的含量减少 ,而起到抗早孕作用。早孕蜕膜组织中这两种 ECM成分可能受孕激素及糖皮质激素的调控。

盆底功能障碍患者血清HA、LN、IV-C和MMP-2的水平及意义

目的研究基质金属蛋白酶-2(MMP-2)、透明质酸(HA)、层粘连蛋白(LN)和Ⅳ型胶原(IV-C)在盆底功能障碍患者血清中的含量变化及其意义;MMP-2在盆底功能障碍患者阴道组织中的表达。方法采用ELISA法检测盆底功能障碍患者绝经前15例和绝经后30例血清MMP-2、HA、LN和IV-C水平,并与无盆底功能障碍患者40例进行比较;用免疫组化法检测盆底功能障碍患者绝经前10例和绝经后20例患者阴道组织中MMP-2的表达,并与正常对照组15例进行比较。结果与正常对照组比较,绝经前和绝经后盆底功能障碍患者血清MMP-2、HA、LN和IV-C水平明显增加(P<0.05);与绝经前比较,绝经后血清MMP-2、LN和IV-C增加更明显(P<0.05);与正常对照组比较,绝经前和绝经后阴道组织中MMP-2的表达明显升高(P<0.05);与绝经前比较,绝经后MMP-2的表达更加明显。结论MMP-2及HA、LN和IV-C在盆底功能障碍患者盆腔脏器脱垂过程中可能起重要作用。

肺癌患者化疗前后血清LN、CoIV水平变化及其临床意义

目的 探讨血清LN、CoIV在肺癌患者化疗前后水平变化及其临床价值。方法 应用放射免疫分析法 (RIA)检测 30例肺癌患者化疗前后血清中LN、CoIV水平 ,以 2 0例健康献血员及体检正常者为对照。结果 肺癌组层粘蛋白 (LN)、Ⅳ型胶原 (CoIV)明显高于对照组 ,化疗后有效者 (完全和部分缓解 )血清中LN、CoIV水平明显低于化疗前。结论 动态检测血清LN、CoIV水平对评价疗效有一定价值。