Transforming growth factor-β1 and vascular endothelial growth factor levels in senile acute myeloid leukemia and correlation with prognosis

BACKGROUND Acute myeloid leukemia(AML)is a disease in which immature hematopoietic cells accumulate in the bone marrow and continuously expand,inhibiting hematopoiesis.The treatment and prognosis of this disease have always been unsatisfactory.AIM To investigate the correlation between vascular endothelial growth factor(VEGF)and transforming growth factor-β1(TGFβ1)expression and prognosis in older adults with AML.METHODS This study enrolled 80 patients with AML(AML group),including 36 with complete response(AML-CR),23 with partial response(AML-PR),and 21 with no response(AML-NR).The expression levels of VEGF and TGFβ1 were detected by reverse transcription polymerase chain reaction in bone marrow mononuclear cells isolated from 56 healthy controls.Kaplan-Meier analysis was performed to assess overall survival(OS)and progression-or disease-free survival(DFS).Prognostic risk factors were analyzed using a Cox proportional hazards model.RESULTS The AML group showed a VEGF level of 2.68±0.16.VEGF expression was lower in patients with AML-CR than those with AML-PR or AML-NR(P<0.05).TGFβ1 expression in the AML group was 0.33±0.05.Patients with AML-CR showed a higher TGFβ1 expression than those with AML-PR or AML-NR(P<0.05).VEGF and TGFβ1 expression in patients with AML was significantly correlated with the counts of leukocytes,platelets,hemoglobin,and peripheral blood immature cells(P<0.05);Kaplan-Meier survival analysis revealed that patients with high TGFβ1 expression had better OS and DFS than those with low TGFβ1 expression(P<0.05),whereas patients with low VEGF levels showed better OS and DFS than those with high VEGF levels(P<0.05).VEGF,TGFβ1,and platelet count were identified by the Cox proportional hazards model as independent risk factors for OS(P<0.05),while VEGF,TGFβ1,and white blood cell count were independent risk factors for DFS(P<0.05).CONCLUSION Decreased VEGF expression and increased TGFβ1 expression in patients with AML provide valuable references for determining and individualizing clinical treatment strategies.

Plasma Levels of Transforming Growth Factor-Beta 1 in Women with Pelvic Organ Prolapse

Objective: In women with pelvic organ prolapse (POP), decreased expression of transforming growth factor-beta 1 (TGF-β1) has been shown in POP tissues. However, no studies have evaluated plasma TGF-β1 levels in patients with POP, so it is unknown whether they are also changed or not. Therefore, we compared plasma TGF-β1 levels in women with and without POP. Methods: Participants were 49 women with POP and 23 healthy control women. All participants were postmenopausal. We measured plasma TGF-β1 and compared data between patients with POP and controls, and between patients with uterine prolapse (UP, n = 19) and those with a cystocele (CC, n = 30). In addition, in patients, we assessed the POP quantification system (POP-Q) stage. Results: Plasma TGF-β1 levels were significantly lower in patients than in healthy controls. POP-Q stage was not significantly different between the UP and CC subgroups, but POP-Q stage IV was diagnosed in 63% of patients with UP and 7% of those with CC. Plasma TGF-β1 levels were significantly lower in the CC subgroup than in the UP subgroup. Conclusion: Plasma TGF-β1 is decreased in POP. It remains unclear whether the lower levels indicate a reduction in systemic TGF-β1 activity, but they can be assumed to reflect reduced TGF-β1 expression in POP tissues.

儿童慢性粒细胞白血病慢性期红细胞参数及血清bFGF、TGF-β1、VEGF表达变化分析

目的探究儿童慢性粒细胞白血病(CML)慢性期红细胞参数及血清碱性成纤维细胞生长因子(bFGF)、转化生长因子β1(TGF-β1)及血管内皮生长因子(VEGF)表达变化。方法前瞻性选取2020年1月至2023年1月在首都医科大学附属北京儿童医院进行治疗的54例CML慢性期患儿为研究组,另随机抽取46名同期在本院进行体检的健康儿童为健康对照组。研究组给予酪氨酸激酶抑制剂治疗。比较两组间红细胞参数及血清bFGF、TGF-β1、VEGF表达变化,并比较研究组治疗前后红细胞参数及血清bFGF、TGF-β1、VEGF表达水平。结果研究组的RBC、血红蛋白、红细胞压积(HCT)及平均红细胞血红蛋白浓度(MCHC)水平分别为(3.45±0.04)×10^(12)/L、(102.33±1.15)g/L、(32.03±0.61)%、322.15±2.58,均显著低于对照组[(4.98±0.03)×10^(12)/L、(149.78±1.88)g/L、(44.33±0.31)%、334.12±0.77],平均红细胞体积(MCV)、平均红细胞血红蛋白含量(MCH)及红细胞体积分布宽度(RDW)水平分别为(91.44±0.77)fL、(33.15±2.55)pg、(17.55±0.12)%,均显著高于对照组[(89.88±0.34)fL、(30.24±0.16)pg、(12.66±0.11)%],差异均有统计学意义(P<0.05)。研究组的血清bFGF、VEGF水平分别为(30.66±9.66)、(128.68±30.58)pg/mL,均显著高于对照组[(5.26±1.54)、(70.66±11.26)pg/mL],TGF-β1水平为(38.22±8.06)μg/L,显著低于对照组[(78.66±8.13)μg/L],差异均有统计学意义(P<0.05)。治疗后,研究组患儿的RBC、血红蛋白、HCT、MCV及MCH水平均较治疗前显著降低,MCHC及RDW水平均较治疗前显著升高,差异均有统计学意义(P<0.05)。研究组治疗后的血清bFGF、VEGF水平均较治疗前显著降低,TGF-β1水平较治疗前显著升高,差异均有统计学意义(P<0.05)。结论在儿童CML慢性期患儿中可见血细胞参数明显异常,血清bFGF、VEGF水平显著升高,TGF-β1水平显著降低。酪氨酸激酶抑制剂治疗CML慢性期能有效改善患儿红细胞形态及功能,抑制肿瘤细胞生长,临床疗效显著,值得临床推广使用。

Roles of Smad3 and Smad7 in rat pancreatic stellate cells activated by transforming growth factor-beta 1

BACKGROUND: Pancreatic stellate cells (PSCs) play a major role in promoting pancreatic fibrosis. Transforming growth factor beta 1 (TGF-beta 1) is a critical mediator of this process. This study aimed to determine the expression of the Smad3 and Smad7 genes in the process of PSC activation, and explore the mechanisms of chronic pancreatitis. METHODS: The expressions of Smad3 and Smad7 in PSCs before and after TGF-beta 1 treatment were detected by reverse transcription-polymerase chain reaction and Western blotting analysis. Smad3 expression was detected in PSCs after treatment with 5 ng/ml of TGF-beta 1 for 24 hours. RESULTS: Smad7 expression was decreased in TGF-beta 1 -activated PSCs (P<0.05) in a dose-dependent manner. When TGF-beta 1 concentration reached 10 ng/ml, the expression of p-Smad3, Smad3, and Smad7 was inhibited (P<0.05). CONCLUSIONS: TGF-beta 1 promotes the expression of Smad3 and inhibits the expression of Smad7 during the activation of PSCs. In contrast, high-dose TGF-beta 1 downregulates the expression of Smad3 in completely activated PSCs.

LOW DOSE PIRFENIDONE SUPPRESSES TRANSFORMING GROWTH FACTOR BETA-1 AND TISSUE INHIBITOR OF METALLOPROTEINASE-1, AND PROTECTS RATS FROM LUNG FIBROSIS INDUCED BY BLEOMYCIN

Objective To investigate the optimal dosage of pirfenidone for the treatment of pulmonary fibrosis induced by bleomycin in Wistar rats, and the alteration of expressions of transforming growth factor beta-1 （ TGF-β1 ）, tissue inhibitor of metalloproteinase-1 （ TIMP-1 ）, and matrix metalloproteinase-13 （ MMP-13 ） in lung tissue. Methods Male Wistar rats were endotracheally instilled with bleomycin or normal saline. Pirfenidone （25-800 mg · kg^-l · d^-1 ）, dexamethasone （3 mg/kg）, or 1% carboxymethylcellulose sodium were given daily by feed 2 days before instillation of bleomycin. Groups T7 and T14 were fed pirfenidone 50 mg · kg^-1 · d^-1 at 7 days or 14 daYs after bleomycin instillation. Lungs were harvested at 28 days after bleomycin instillation. Patholological changes in luffg tissues were evaluated with HE staining. Lung collagen was stained by sirius red and measured by content of hydroxypro- line. Expression of proteins of TGF-β1 TIMP-1, and MMP-13 were detected by Western blotting. Results At doses of 25, 50, and 100 mg· kg^- 1 · d ^- 1, pirfenidone had significant anti-fibrotic effects for bleomy- cin-induced rat pulmonary fibrosis, and these effects were most significantly attenuated at the dosage of 50 mg · kg^-1 ·d^ -1（ HE： P 〈 0. 01, P 〈 0.01, and P = 0.064; sirius red： P 〈0.05, P 〈 0.01, and P 〈 0.05 ; hydroxyproline： P = 0.595, P 〈 0.01, and P = 0.976）. Pirfenidone at a dosage of 50 mg · kg^- l · d^-1 inhibited protein expression of TGF-131 and TIMP-1 in lung tissue in the early phase （0.79 and 0.75 times of control group）, but had no effect on ex- nr^eelnn nf MMP-13. Conclusion Low dose pirfenidone, especially at dosage of 50 mg · kg^-1 · d^-1, has significant anti-fibrotic effects on bleomycin-induced rat pulmonary fibrosis. Pirfenidone partially inhibits the enhancement of the expression of TGF-131 and TIMP-β1 in lung tissue.

Interference of Y-27632 on the signal transduction of transforming growth factor beta type 1 in ocular Tenon capsule fibroblasts

AIM: To investigate the interfering effect of Y-27632, a ROCK-I selective inhibitor, on the signal transduction pathway of transforming growth factor-beta 1 (TGF-beta 1) in ocular Tenon capsule fibroblasts (OTFS) in vitro. METHODS: After OTFS from passages 4 to 6 47 vitro were induced by TGF-beta 1 and then treated by Y-27632, the changes of the OTFS cell cycles were analyzed via flow cytometry, and the proteins expression of the alpha -smooth muscular actin (alpha -SMA), connective tissue growth factor (CTGF), collagen I were calculated by Western blot. After OTFS treated by the different concentrations of Y-27632, the expression levels of the alpha -SMA, CTGF and collagen I mRNA were assayed by RT-PCR. RESULTS: Y-27632 had no markedly effect on the OTFS cell cycles. After treated by TGF-beta 1, OTFS in G1 period significantly increased. The cell cycles distribution by both TGF-beta 1 and Y-27632 had no remarkable difference from that in control group. Y-27632 significantly inhibited the proteins expressions of both alpha -SMA and CTGF, while to some extent inhibited that of collagen I. TGF-beta 1 significantly promoted the proteins expressions of alpha -SMA, CTGF and collagen I. After OTFS treated by both TGF-beta 1 and Y-27632, of alpha -SMA, the protein expression was similar with that in control group (P=0.066>0.05), but the protein expression of CTGF or collagen I, respectively, was significantly different from that in control group (P=0.000<0.01). The differences of expressions of the alpha -SMA, CTGF and collagen I mRNA in 30, 150, 750 mu mol/L Y-27632 group were statistically significant, compared with those in control group, respectively (alpha -SMA, P=0.002, 0.000, 0.000; CTGF, P=0.014, 0.002, 0.001; collagen I,P=0.003, 0.002, 0.000). CONCLUSION: Blocking the Rho/ROCK signaling pathway by using of Y-27632 could inhibit the cellular proliferation and the expression of both CTGF and alpha -SMA whatever OTFS induced by TGF-beta 1 or not. Y-27632 suppressed the expression of collagen I mRNA without induction.

血清和胸腔积液PAI-1、TGF-β、VEGF、IL-6在结核性胸膜炎胸膜纤维化患者中的变化及临床意义

目的探讨血清和胸腔积液纤溶酶原激活剂抑制物-1(PAI-1)、转化生长因子-β(TGF-β)、血管内皮生长因子(VEGF)、白细胞介素-6(IL-6)在结核性胸膜炎胸膜纤维化患者中的变化及临床意义。方法选取2020年7月至2023年7月该院收治的103例结核性胸膜炎胸膜纤维化患者作为研究对象,治疗2周后,根据糖皮质激素治疗疗效将其分为显效组、非显效组。比较两组治疗前及治疗1、2周后血清和胸腔积液PAI-1、TGF-β、VEGF、IL-6水平。采用Spearman相关分析血清和胸腔积液PAI-1、TGF-β、VEGF、IL-6水平与疗效的相关性。治疗2周后血清PAI-1、TGF-β、VEGF、IL-6水平与胸腔积液中该指标水平之间进行Pearson相关分析。绘制受试者工作特征曲线分析治疗1、2周后血清和胸腔积液PAI-1、TGF-β、VEGF、IL-6水平对结核性胸膜炎胸膜纤维化患者疗效的预测价值。结果两组治疗1、2周后血清和胸腔积液PAI-1、TGF-β、VEGF、IL-6水平低于治疗前,显效组治疗1、2周后血清和胸腔积液PAI-1、TGF-β、VEGF、IL-6水平低于非显效组,差异有统计学意义(P<0.05)。治疗1、2周后血清和胸腔积液PAI-1、TGF-β、VEGF、IL-6水平与疗效呈负相关(P<0.05)。治疗2周后血清PAI-1、TGF-β、VEGF、IL-6水平和胸腔积液PAI-1、TGF-β、VEGF、IL-6水平呈正相关(r=0.761、0.783、0.812、0.741,均P<0.05)。治疗1、2周后血清和胸腔积液各指标联合检测的曲线下面积(AUC)大于其单独指标的AUC(P<0.05)。结论结核性胸膜炎胸膜纤维化患者血清和胸腔积液PAI-1、TGF-β、VEGF、IL-6水平与疗效有关,血清及胸腔积液PAI-1、TGF-β、VEGF、IL-6联合检测的预测价值较好,能够为临床干预提供参考依据。

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.

Effects of RNA interference targeting transforming growth factor-beta 1 on immune hepatic fibrosis induced by Concanavalin A in mice

BACKGROUND: Previous studies have shown that transforming growth factor-beta 1 (TGF-beta 1) is the most potent means of stimulating liver fibrogenesis by myofibroblast-like cells derived from hepatic stellate cells. Thus, TGF-beta 1 could be a target for treating hepatic fibrosis. This study aimed to investigate the inhibitory effects of specific TGF-beta 1 small interference RNA (siRNA) on immune hepatic fibrosis induced by Concanavalin A (Con A) in mice. METHODS: Three short hairpin RNAs targeting different positions of TGF-beta 1 were designed and cloned to the plasmid pGenesil-1 to obtain three recombinant expression vectors (pGenesil-TGF-beta 1-ml, pGenesil-TGF-beta 1-m2 and pGenesil-TGF-beta 1-m3). Thirty male Kunming mice were randomly divided into 6 groups: normal, model, control, and three treatment groups. The immune hepatic fibrosis models were constructed by injecting Con A via the tail vein at 8 mg/kg per week for 6 weeks. At weeks 2, 4 and 6, pGenesil-TGF-beta 1-ml, pGenesil-TGF-beta 1-m2 or pGenesi1-TGF-beta 1-m3 was injected by a hydrodynamics-based transfection method via the tail vein at 0.8 ml/10 g within 24 hours after injection of Con A in each of the three treatment groups. The mice in the control group were injected with control plasmid pGenesil-HK at the same dose. All mice were sacrificed at week 7. The levels of hydroxyproline in liver tissue were determined by biochemistry. Liver histopathology was assessed by Van Gieson staining. The expression levels and localization of TGF-beta 1, Smad3, and Smad7 in liver tissue were detected by immunohistochemistry. The expression of TGF-beta 1, Smad3, Smad7 and alpha-smooth muscle actin (alpha-SMA) mRNAs in the liver were assessed by semi-quantitative RT-PCR. RESULTS: The levels of hydroxyproline in the liver tissue of the treatment groups were lower than those of the model group (P<0.01). Histopathologic assay showed that liver fibrogenesis was clearly improved in the treatment groups compared with the model group. The expression levels of TGF-beta 1 and Smad3 of liver tissue were also markedly lower in the treatment groups than in the model group (P<0.01), while the levels of Smad7 were higher in the treatment groups than in the model group (P<0.01). RT-PCR further showed that the expression of TGF-beta 1, Smad3 and alpha-SMA mRNA was significantly inhibited in the treatment groups compared with the model group, while the levels of Smad7 were increased. There was no difference in the above parameters among the three treatment groups or between the control and model groups (P>0.05), but the inhibitory effect of pGenesil-TGF-beta 1-ml was the highest among the treatment groups. CONCLUSIONS: Specific siRNA targeting of TGF-beta 1 markedly inhibited the fibrogenesis of immune hepatic fibrosis induced by Con A in mice. The anti-fibrosis mechanisms of siRNAs may be associated with the down-regulation of TGF-beta 1, Smad3 and alpha-SMA expression and up-regulation of Smad7 expression in liver tissue, which resulted in suppressing the activation of hepatic stellate cells. (Hepatobiliary Pancreat Dis Int 2009; 8: 300-308)

Molecular Tissue Engineering: Applications for Modulation of Mesenchymal Stem Cells Proliferation by Transforming Growth Factor β_1 Gene Transfer

The effect of transforming growth factor β 1 (TGF β 1 ) gene transfection on the proliferation of bone marrow derived mesenchymal stem cells (MSC S ) and the mechanism was investigated to provide basis for accelerating articular cartilage repairing using molecular tissue engineering technology. TGF β 1 gene at different doses was transduced into the rat bone marrow derived MSCs to examine the effects of TGF β 1 gene transfection on MSCs DNA synthesis, cell cycle kinetics and the expression of proliferating cell nuclear antigen (PCNA). The results showed that 3 μl lipofectamine mediated 1 μg TGF β 1 gene transfection could effectively promote the proliferation of MSCs best; Under this condition (DNA/Lipofectamine=1μg/3μl), flow cytometry and immunohistochemical analyses revealed a significant increase in the 3 H incorporation, DNA content in S phase and the expression of PCNA. Transfection of gene encoding TGF β 1 could induce the cells at G0/G1 phase to S1 phase, modulate the replication of DNA through the enhancement of the PCNA expression, increase the content of DNA at S1 phase and promote the proliferation of MSCs. This new molecular tissue engineering approach could be of potential benefit to enhance the repair of damaged articular cartilage, especially those caused by degenerative joint diseases.

Pre-ischemia electro-acupuncture potentiates the expression of Bcl-2 and transforming growth factor-beta 1 in rat brains

The expression of the anti-apoptotic molecules Bcl-2 and transforming growth factor-beta 1 is known to confer protective effects on the cerebral ischemia-reperfusion injury.The current study investigated the expression levels of Bcl-2 and transforming growth factor-beta 1 in response to multiple pre-ischemia electro-acupuncture at acupoints Zusanli（ST36）and Fengchi（GB20） stimulation.Rats were divided into five groups：uninjured,control,non-acupoint,GB20 and ST36. Rats in the non-acupoint,GB20 and ST36 groups received 30 minutes（3 times or 18 times）of electro-acupuncture stimulation before experimental cerebral ischemia was induced.Bcl-2 and transforming growth factor-beta 1 were found to be significantly increased in the ST36 groups with either 3 or 18 electro-acupuncture treatments（P〈0.05）.The production was higher with 18 electro-acupuncture treatments in the ST36 groups（P〈0.05）.In the GB20 groups,significant increase was only observed in transforming growth factor-beta 1 with 18 electro-acupuncture treatments（P〈0.05）.No significant elevation of the level of transforming growth factor-beta 1 was observed in the non-acupoint groups.However,the production of Bcl-2 increased with 18 treatments in the non-acupoint groups（P〈0.05）.The data suggest that multiple pre-ischemia electro-acupuncture at ST36 was effective in conferring neuroprotective effect on the brain by means of upregulation of Bcl-2 and transforming growth factor-beta 1 and the effect was increase with the number of treatment.

褐藻聚合酚下调TGF-β_(1)/Smads信号通路抑制大肠癌细胞增殖与侵袭

目的探讨褐藻聚合酚(PFFE-A)对大肠癌细胞增殖与侵袭的影响,以及其对转化生长因子β_(1)(TGF-β_(1))及母体抗生物皮肤生长因子同源物2/3(Smad2/3)通路的调控作用。方法细胞分组:依次以50、100、150μmol·L-1的小、中、大剂量的PFFE-A干预细胞,另设立正常对照组细胞。5-乙炔基-2'脱氧尿苷(EdU)染色检测细胞的增殖;Transwell小室检测细胞的侵袭能力;异种种植结肠癌裸鼠模型检测细胞的体内生长与转移能力;实时荧光定量聚合酶链反应(RT-qPCR)检测细胞中上皮间质转化(EMT)相关基因的表达;Western blotting检测细胞中TGF-β_(1)、p-Smad2/3的表达水平。结果与正常对照组比较,PFFE-A小、中、大剂量组细胞的增殖率、侵袭细胞数、肿瘤瘤体质量、病灶转移比例、神经型钙黏附蛋白(N-cadherin)的mRNA的表达、TGF-β_(1)和p-Smad2/3的表达明显下降(P<0.05),E-钙黏蛋白(E-cadherin)的mRNA的表达明显升高(P<0.05),具有明显的剂量依赖性(P<0.05)。结论PFFE-A能抑制肿瘤细胞的EMT过程,抑制大肠癌细胞HT29的体外增殖与侵袭能力,下调其体内生长与转移的能力,这可能是通过下调TGF-β_(1)/Smads信号实现的。

血清LRG1、TGF-β1水平与急性脑梗死颈动脉内膜中层厚度及近期预后不良的关系

目的探讨血清富亮氨酸α-2糖蛋白-1(LRG1)、转化生长因子-β1(TGF-β1)水平与急性脑梗死(ACI)颈动脉内膜中层厚度(IMT)及近期预后不良的关系。方法选取2020年1月至2023年1月在苏州市广济医院诊治的123例ACI患者,根据IMT将患者分为正常组(23例)、增厚组(30例)和斑块组(70例),另选取同期苏州市广济医院35例体检健康者作为健康对照组,比较4组血清LRG1、TGF-β1水平及IMT。随访3个月,根据预后情况将患者分为预后良好组(75例)和预后不良组(48例),采用Pearson法分析血清LRG1、TGF-β1与IMT的相关性;采用单因素和多因素Logistic回归分析ACI患者近期预后不良的危险因素;采用受试者工作特征(ROC)曲线分析血清LRG1、TGF-β1水平对ACI患者近期预后不良的预测价值。结果健康对照组、正常组、增厚组、斑块组血清LRG1水平依次升高,TGF-β1水平则依次降低(P<0.05)。Pearson相关性分析显示,血清LRG1与IMT呈正相关,TGF-β1则与IMT呈负相关(P<0.05)。预后不良组年龄、合并糖尿病患者占比、入院美国国立卫生研究院卒中量表(NIHSS)评分、低密度脂蛋白胆固醇(LDL-C)、空腹血糖(FPG)、白细胞计数(WBC)、C-反应蛋白(CRP)及血清LRG1水平均高于预后良好组(P<0.05),发病至溶栓时间长于预后良好组(P<0.05),血清TGF-β1水平则低于预后良好组(P<0.05)。多因素Logistic回归分析显示,NIHSS评分高、发病至溶栓时间长、血清LRG1水平升高及TGF-β1水平降低均是影响ACI患者近期近期预后不良的危险因素(P<0.05)。ROC曲线结果显示,血清LRG1、TGF-β1单独及联合预测ACI患者近期预后不良的曲线下面积分别为0.824、0.708、0.902。结论ACI患者存在血清LRG1水平升高、TGF-β1水平降低的情况,血清LRG1、TGF-β1水平与IMT及ACI患者近期预后密切相关,联合检测血清LRG1、TGF-β1水平对预测ACI患者近期预后不良有较高的参考价值。

疏血通注射液辅助治疗对老年缺血性脑卒中患者认知功能及TGF-β_(1)、Smad1的影响

目的:探讨疏血通注射液辅助治疗对老年缺血性脑卒中患者认知功能及转化生长因子-β_(1)(TGF-β_(1))、Smad同源物1(Smad1)的影响。方法:选择2021年4月—2023年4月昆山市锦溪人民医院收治的82例老年缺血性脑卒中患者作为研究对象。将随机分为观察组、对照组,各41例。对照组采用常规治疗,观察组在对照组基础上采用疏血通注射液辅助治疗。比较两组认知功能、TGF-β_(1)、Smad1、自理能力和神经功能、不良反应发生率。结果:治疗后,两组简易精神状态检查量表(MMSE)、蒙特利尔认知评估量表(MoCA)评分高于治疗前,临床痴呆评定量表(CDR)评分低于治疗前,且观察组MMSE、MoCA评分高于对照组,CDR评分低于对照组,差异有统计学意义(P<0.05)。治疗后,两组TGF-β_(1)低于治疗前,Smad1高于治疗前,且观察组TGF-β_(1)低于对照组,Smad1高于对照组,差异有统计学意义(P<0.05)。治疗后,两组日常生活能力量表(ADL)评分高于治疗前,美国国立卫生研究院卒中量表(NIHSS)评分低于治疗前,且观察组ADL评分高于对照组,NHISS评分低于对照组,差异有统计学意义(P<0.05)。观察组不良反应总发生率为7.32%,低于对照组的14.63%,但两组间比较,差异无统计学意义(P>0.05)。结论:疏血通注射液辅助治疗能够有效改善老年缺血性脑卒中患者的认知功能、TGF-β_(1)、Smad1,提高患者自理能力及神经功能,具有较高的安全性。

Osteogenic Potential of Cultured Bone Marrow Stromal Cells Transfected with Transforming Growth Factor β_1 Gene in vitro

To study the osteogenic potential of cultured bone marrow stromal cells transfected with transforming growth factor β 1 gene in vitro , cultured BMSCs were transfected with the complexes of pcDNA 3 TGF β 1 and Lipofectamine Reagent in vitro . The cell proliferation was detected by MTT method and the morphological features of transfected BMSCs was observed. ALP stains and PNP method were used to measure ALP activity. In addition, the collagen type Ⅰ propeptides and mineralized matrixes were examined by immunohistochemical staining and tetracycline fluorescence labeling respectively. The morphological and biological characters of the transfected BMSCs were similar to those of osteoblasts and the cell proliferation was promoted. The cell layer displayed strong positive reaction for ALP stains and immunohistochemical staining. ALP activity and collagen type Ⅰ expression increased remarkably after transfection. Mineralized matrixes formed earlier and more in transfected BMSCs as compared with control group. It is concluded that transfecting with TGF β 1 gene could promote the osteogenic potential of cultured BMSCs.

Effects of Heparin on Transforming Growth Factor-β_1 and Extracellular Matrix Components in the Glomeruli of Diabetic Rats

The effects of heparin on the expression of transforming growth factor-β 1 (TGF-β 1) and two extracellular matrix components laminin (LN) and fibronectin (FN) in diabetic rat glomeruli were investigated. Twenty-six rats were randomly divided into control group (C, n=8), diabetic group (D, n=9), and diabetes+heparin group (DH, n=9). After 8-week therapy of heparin (200 U once daily by abdominal injection), TGF-β 1, LN and FN expression in glomeruli was detected by immunohistochemical method. The results showed that the expression levels of TGF-β 1, LN and FN were higher in group D than in group C. It was found that heparin could reduce 24-h urinary albumin excretion and inhibit overexpression of TGF-β 1, LN and FN in glomeruli of diabetic rats. It suggested that the inhibitory effect of heparin on diabetic glomerular sclerosis was at least partly related with the inhibition of TGF-β 1 expression.

Correlation between expression of two transforming growth factor-beta 1 receptors and microvascular density in a rat model of cerebral ischemia and reperfusion injury

The effects of transforming growth factor-β1 （TGF-β1） are currently controversial. Whether TGF-β1 promotes or inhibits revascularization under different conditions remains poorly understood. Based on previous studies, the current experiment established rat models of cerebral ischemia and reperfusion injury （IRI）, and demonstrated that pathological and functional damage was also increased after IRI. The most serious damage was observed at 3 days after reperfusion, at which time microvascular density fell to its lowest level. Soon afterwards, microvascular density increased, new collateral circulation was gradually established at 4 to 7 days after reperfusion, and pathological damage and neurological deficits were improved. TGF-β1, activin receptor-like kinase 5 （ALK5） mRNA and protein expression levels increased gradually over time. In contrast, ALK1 mRNA and protein expression decreased over the same period. A significant negative correlation was detected between microvascular density and expression of the ALK5 gene transcript. There was no correlation between microvascular density and ALK1 gene transcriptional expression following cerebral IRI in a rat model. These findings suggest that ALK5, rather than ALK1, is the critical receptor in the TGF-β1 signal pathways after cerebral IRI.

胰岛素样生长因子1对人RPE细胞分泌TGF-β2、MMP-2的影响及机制研究

目的研究胰岛素样生长因子1(IGF-1)对人视网膜色素上皮细胞(ARPE-19)表达转化生长因子β2(TGF-β2)、基质金属蛋白酶2(MMP-2)的影响,并探索其作用机制。方法ARPE-19细胞分别按不同浓度IGF-1和不同浓度LY294002培养6 h、12 h、24 h、48 h,采用CCK-8法检测细胞活力,确定IGF-1、LY294002的最佳作用浓度与时间。细胞划痕法检测细胞迁移活性。ELISA法检测细胞培养上清液中TGF-β2浓度。将ARPE-19细胞分为对照组、IGF-1组(80μg·L^(-1) IGF-1)、IGF-1+LY294002组(80μg·L^(-1) IGF-1+30 mmol·L^(-1) LY294002)、LY294002组(30 mmol·L^(-1) LY294002),使用无血清DMEM/F12培养基培养,对照组不做任何处理,分别采用RT-PCR、Western blot检测细胞中TGF-β2、MMP-2、磷脂酰肌醇-3-激酶(PI3K)、蛋白激酶B(AKT)的mRNA和蛋白表达量。结果与0μg·L^(-1) IGF-1比较,80μg·L^(-1) IGF-1的细胞活力24 h变化显著(P<0.05),故确定其为IGF-1最佳作用浓度和时间。与0 mmol·L^(-1) LY294002比较,24 h的30 mmol·L^(-1) LY294002接近半数抑制浓度,故确定其为LY294002最佳作用时间和浓度。细胞划痕法检测结果显示,0μg·L^(-1) IGF-1组、40μg·L^(-1) IGF-1组、80μg·L^(-1) IGF-1组细胞迁移率整体比较及两两比较差异均有统计学意义(均为P<0.05)。ELISA检测结果显示,0μg·L^(-1) IGF-1组、40μg·L^(-1) IGF-1组、80μg·L^(-1) IGF-1组细胞上清液中TGF-β2浓度整体比较及两两比较差异均有统计学意义(均为P<0.05)。RT-PCR、Western blot检测结果显示,IGF-1、LY294002培养24 h,与对照组比较,IGF-1组细胞中TGF-β2、MMP-2、PI3K、AKT的mRNA与蛋白表达水平均升高,而LY294002组细胞中TGF-β2、MMP-2、PI3K、AKT的mRNA与蛋白表达水平均下降(均为P<0.05);与IGF-1组比较,IGF-1+LY294002组细胞中TGF-β2、MMP-2、PI3K、AKT的mRNA与蛋白表达水平均下降(均为P<0.05)。结论IGF-1能促进ARPE-19细胞增殖、迁移;IGF-1可能通过PI3K/AKT信号通路上调ARPE-19细胞中TGF-β2、MMP-2的表达,参与近视的发生与发展。

不同方法联合放疗治疗薄型瘢痕疙瘩的疗效及对MMPs、HIF-1α、TGF-β1的影响

目的探讨不同方法联合放疗治疗薄型瘢痕疙瘩的疗效及对基质金属蛋白酶(MMPs)、缺氧诱导因子-1α(HIF-1α)及转化生长因子-β1(TGF-β1)的影响。方法回顾性选取2020年10月至2022年9月内蒙古医科大学附属肿瘤医院(内蒙古自治区肿瘤医院)整形外科收治的胸腹部瘢痕疙瘩患者62例(瘢痕疙瘩数94个),依据治疗方法不同分为激光联合放疗(LCR)组(30例,瘢痕疙瘩数47个)、手术联合放疗(SCR)组(32例,瘢痕疙瘩数47个)。LCR组行CO 2点阵LCR,SCR组行SCR。观察两组治疗12个月后临床疗效、复发情况。比较两组治疗前、治疗12个月后的患者与观察者瘢痕评估量表(POSAS)评分、温哥华瘢痕量表(VSS)评分、瘢痕组织基质金属蛋白酶(MMP)-2、MMP-9、HIF-1α、TGF-β1等细胞因子水平的变化。结果LCR组总有效率(93.62%)大于SCR组(76.60%),复发率(4.26%)小于SCR组(19.15%),差异均有统计学意义(P<0.05)。治疗12个月后,LCR组POSAS、VSS评分分别为(23.96±2.64)、(5.28±0.54)分,均低于SCR组[(33.96±3.59)、(6.55±0.68)分],差异均有统计学意义(P<0.05)。LCR组瘢痕组织MMP-2、MMP-9及HIF-1α、TGF-β1表达量分别为111.65±13.55、106.76±12.68、1.24±0.14、1.10±0.12,均低于SCR组(127.96±14.71、121.08±14.33、1.55±0.17、1.22±0.13),差异均有统计学意义(P<0.05)。两组不良反应发生率比较(38.30%vs.46.81%),差异无统计学意义(P>0.05)。结论LCR和SCR均可改善薄型瘢痕疙瘩症状,抑制瘢痕疙瘩复发,但LCR的治愈率更高,复发率更低,对瘢痕组织MMPs及HIF-1α、TGF-β1表达抑制作用更强,且安全性较高,值得临床推荐。

老年患者NLR、TGF-β1、Cav-1水平与颅内大动脉急性闭塞机械取栓术后出血风险的关系

目的探讨老年患者中性粒细胞/淋巴细胞比值(NLR)、转化生长因子-β1(TGF-β1)、陷窝蛋白1(Cav-1)与颅内大动脉急性闭塞机械取栓术后出血风险的关系。方法选取2017年9月—2021年12月河北中石油中心医院行颅内大动脉急性闭塞机械取栓术的老年颅内大动脉急性闭塞患者120例。根据术后是否出血分为出血组和非出血组,比较2组患者临床资料和NLR、TGF-β1、Cav-1水平差异。采用多因素Logistic回归分析评价术后出血的影响因素;采用受试者工作特征(ROC)曲线评价NLR、TGF-β1、Cav-1预测术后出血的价值。结果出血组美国国立卫生研究院卒中量表(NIHSS)评分为(19.91±2.28)分,NLR和Cav-1分别为(7.20±1.12)和(19.29±5.53)ng·mL^(-1),均高于非出血组(P<0.05);Alberta卒中项目早期电子计算机断层扫描评分(ASPECTS)评分为(5.40±0.77)分,TGF-β1为(20.20±8.28)pg·mL^(-1),均低于非出血组(P<0.05)。多因素Logistic回归分析结果显示,NIHSS评分、NLR是患者术后出血的危险因素(P<0.05),ASPECTS评分是患者术后出血的保护因素(P<0.05)。ROC曲线分析结果显示,基于ASPECTS评分、NIHSS评分、NLR建立的预测模型预测术后出血的曲线下面积为0.851,敏感性和特异性分别为64.00%和84.00%。结论NLR、Cav-1、TGF-β1均与老年患者颅内大动脉急性闭塞机械取栓术后出血有关。基于ASPECTS评分、NIHSS评分、NLR建立的预测模型在预测患者术后出血中有一定的应用价值。