Effects of salvianolic acid-A on NIH/3T3 fibroblast proliferation,collagen synthesis and gene expression

AIM To investigate the mechanisms ofsalvianolic acid A（SA-A）against liver fibrosisin vitro.METHODS NIH/3T3 fibroblasts were culturedroutinely,and incubated with 10-4mol/L-10-7mol/L SA-A for 22 h.The cell viability wasassayed by[3H]proline incorporation,cellproliferation by[3H]TdR incorporation,cellcollagen synthetic rate was measured with[3H]proline impulse and collagenase digestionmethod.The total RNA was prepared from thecontrol cells and the drug treated cellsrespectively,and α（1）I pro-collagen mRNAexpression was semi-quantitatively analyzedwith RT-PCR.RESULTS 10-4mol/L SA-A decreased cellviability and exerted some cytotoxiciy,while10-5mol/L-10-7mol/L SA-A did not affect cellviability,but inhibited cell proliferationsignificantly,and 10-6mol/L SA-A had the besteffect on cell viability among theseconcentrations of drugs.10-5mol/L-10-6mol/LSA-A inhibited intracellular collagen syntheticrate,but no significant influence on extracellularcollagen secretion.Both 10-5mol/L and10-6mol/L SA-A could decrease α（1）I pro-collagen mRNA expression remarkably.CONCLUSION SA-A had potent action againstliver fibrosis.It inhibited NIH/3T3 fibroblastproliferation,intracellular collagen syntheticrate and type I pro-collagen gene expression,which may be one of the main mechanisms of thedrug.

Activation of adult endogenous neurogenesis by a hyaluronic acid collagen gel containing basic fibroblast growth factor promotes remodeling and functional recovery of the injured cerebral cortex

The presence of endogenous neural stem/progenitor cells in the adult mammalian brain suggests that the central nervous system can be repaired and regenerated after injury.However,whether it is possible to stimulate neurogenesis and reconstruct cortical layers II to VI in non-neurogenic regions,such as the cortex,remains unknown.In this study,we implanted a hyaluronic acid collagen gel loaded with basic fibroblast growth factor into the motor cortex immediately following traumatic injury.Our findings reveal that this gel effectively stimulated the proliferation and migration of endogenous neural stem/progenitor cells,as well as their differentiation into mature and functionally integrated neurons.Importantly,these new neurons reconstructed the architecture of cortical layers II to VI,integrated into the existing neural circuitry,and ultimately led to improved brain function.These findings offer novel insight into potential clinical treatments for traumatic cerebral cortex injuries.

Effects of connective tissue growth factor antisense oligonucleotides on the proliferation and collagen synthesis of the cultured human keloid fibroblasts in vitro

Objective: To explore the effects of connective tissue growth factor (CTGF) on the pathogenesis of human keloid. Methods: CTGF antisense oligonucleotides (ASODN) conjugated with isothiocyananate fluorescence was encapsulated by liposome, and then added into the human keloid fibroblasts (HKFs) culture media. The intracellular distribution of CTGF ASODN was observed by fluorescence microscopy in the fixed HKFs. The proliferation of HKFs was measured by MTT test. The collagen synthesis of HKFs was measured by 3H-proline incorporation method. Results: Compared with control group, the CTGF ASODN can inhibit the proliferation and collagen synthesis of the HKFs (P<0.01). Conclusion: CTGF ASODN has anti-fibrotic effects on keloid in vitro, and CTGF play an important role in promoting the fibrosis of keloid.

HSP47 Deletion Inhibits TGF-β1 Stimulation on Proliferation and Collagen Synthesis of Human Tenon Fibroblasts

Heat shock protein 47 (HSP47) is a collagen-specific molecular chaperone that is required for mo-lecular maturation of various types of collagens. Many studies have shown a close association be-tween increased expression of HSP47 and excessive accumulation of collagens in scar tissues of various human fibrotic diseases. However, the role of HSP47 in formation of scar after glaucoma filtration surgery is still unclear. In this study, we deleted the expression of HSP47 in human tent on fibroblasts (HTFs) by virus infection, and then the proliferation and collagen synthesis were compared between HSP47 deletion cells and control upon TGF-β1 stimulation. Our data showed that HSP47 deletion could significantly inhibit the proliferation and collagen synthesis of HTFs upon TGF-β1 stimulation, HSP47 gene suppression might be a novel method to against the formation of scar after glaucoma surgery.

Experimental study on effect of endothelin in the proliferation and collagen synthesis of human scar-derived fibroblasts

Objective To investigate the role of endothelin(ET) in the proliferation and collagen synthesis of human scar-derived fibroblasts and the moduktion of its antagonists such as nitric oxide(NO), tetrandrine ( Tet). Methods With the cultured fibroblasts from the scarring tissue, the cell pdiferation was determined by[3H]-TdR incorporation, while the collagen synthesis was evaluated by[3H]-proline incorporation. Results The ET-1 was significantly increasing the proliferation and collagen synthesis of human scar-derived fibroblasts. The values of [3H]-TdR absorption in the 2.5 ng/ml,25 ng/ml and 100 ng/ml of ET-1 groups were 1.8 times,4 times and 4.9 times more than in the control group, respectively(P【0. 01),while the values of the [3H]-proline incorporation were 1.1 times,3.1 times and 3.8 times respectively(P【0.01). The fibroblasts, treated with 50 μg/ml of S-nitroso-N-acetyl penicillamine(SNAP), were no detectable effect on the basal level of DNA synthesis,but produced decreasing effect on the

The role of calcineurin in the lung fibroblasts proliferation and collagen synthesis induced by basic fibroblast growth factor

Objective To investigate the role of calcineurin (CaN) in the lung fibroblast proliferation and collagen synthesis induced by basic fibroblast growth factor (bFGF).Methods We used Western blot and immunohistochemical methods for investigating the content and distribution of calcineurin in the lung tissue. Calcineurin activity in different tissues was measured using 32P-labelled substrate. In the primary culture of lung fibroblasts, 3H-thymidine (3H-TdR) and 3H-proline incorporation methods were used to study the effect of cyclosporin A (CsA), an inhibitor of calcineurin, on the lung fibroblast DMA and collagen synthesis stimulated by bFGF.Results We found that calcineurin was expressed in lung tissue and has phosphatase activity (7.1±2.0 pmol Pi/mg pr/min). CsA (10^(-8)-10^(-6) mol/L) inhibited lung fibroblast 3H-TdR incorporation induced by bFGF in a dose-dependent manner, with the inhibitory rates by 20% , 46% and 66% (P< 0.01). CsA (10^(-7) -10^(-6) mol/L) inhibited 3H-proline incorporation in lung fibroblasts stimulated by bFGF, with the inhibitory rates by 21% and 37% (P<0. 01). In a culture medium, CsA (10^(-8)-10^(-6) mol/L) inhibited 3H-proline secretion induced by bFGF in a dose-dependent manner, with the inhibitory rates by 19%, 29% (P<0. 05) and 56% (P<0. 01). CsA (10^(-7) mol/L) could inhibit calcineurin activity by 44% in lung fibroblasts (P<0. 01).Conclusions Calcineurin is expressed in lung tissue and has phosphatase activity. It is involved in the bFGF stimulated lung fibroblast DNA and collagen synthesis.

Effects of Tetramethylpyrazine and Radix Salviae Miltiorrhizae on Collagen Synthesis and Proliferation of Cardiac Fibroblasts

Objective: To explore the effects of Tetramethylpyrazine (TMP) and Radix Salviae Miltiorrhizae (RSM) on collagen synthesis and proliferation of cardiac fibroblasts. Methods: Using collagenase and pancreatin digested rat cardiac tissue assay to isolate cardiac fibroblasts (FB). Different dosage of TMP, RSM and norepinephrine were used to study their effects on the collagen synthesis and proliferation of cultured cardiac FB. Results: Compared with the control group, moderate or high dosage TMP and RSM could significantly inhibit the collagen synthesis and the proliferation of cultured cardiac FB. Moreover, low-dose TMP (50 mg/L) and low-dose RSM (3 g/L) could antagonize the collagen synthesis and the proliferation of cultured cardiac FB stimulated by NE (500μg/L). Conclusion: Both TMP and RSM can inhibit the collagen synthesis and proliferation of cultured cardiac FB processes.The mechanisms of these effects might be correlated to their Ca++ antagonistic action. Original article on CJIM(Chin) 1998; 18(7): 423

FGF2通过PERK/EIF2α/ATF4信号通路调节缺氧诱导的巩膜成纤维细胞增殖和胶原代谢

目的研究FGF2对缺氧诱导的巩膜成纤维细胞(scleral fibroblasts,SF)增殖和胶原的影响并探讨其可能调节的下游信号通路。方法用5%O2刺激SF 24 h诱导近视SF模型,RT-qPCR检测FGF2 mRNA表达,Western blot检测FGF2蛋白表达。细胞计数试剂盒8(Cell Count Kit-8,CCK-8)、流式细胞术和Western blot分别检测细胞增殖活力、细胞凋亡和胶原代谢相关蛋白collagenⅠ、MMP2以及通路蛋白PERK、p-PERK、EIF2α、EIF2α、ATF4表达。结果缺氧刺激可促进FGF2 mRNA和蛋白表达升高(P<0.01)并激活PERK/EIF2α/ATF4通路(P<0.001),抑制SF细胞增殖(P<0.001)和collagenⅠ表达(P<0.001),诱导MMP2表达(P<0.001)及细胞凋亡(P<0.001)。敲降FGF2或经PERK抑制剂GSK2606414处理可逆转缺氧对SF细胞的作用,促进细胞增殖活力(P<0.001)和collagenⅠ表达(P<0.01),减少细胞凋亡(P<0.01)。结论FGF2通过调节PERK/EIF2α/ATF4通路的激活,影响缺氧诱导的SF增殖及胶原代谢。

苦参碱对血管紧张素Ⅱ诱导新生大鼠心肌成纤维细胞增殖和胶原合成的影响

目的 :研究苦参碱 (matrine)对血管紧张素Ⅱ (AngⅡ )诱导新生大鼠心肌成纤维细胞 (cardialfibroblasts,CFb)增殖和胶原合成的影响 ,探讨其抑制心肌纤维化的机制。方法 :建立AngⅡ诱导新生大鼠CFb纤维化模型 ,采用MTT法检测Mat对CFb增殖的影响 ;羟脯氨酸测定检测CFB胶原合成量 ;RT PCR检测Mat作用下CFb的Ⅰ型胶原、间质胶原酶 (MMP 13)、组织金属白酶抑制因子 1(TIMP 1)、TGFβ 1的基因表达情况。结果 :①在一定范围内 ,苦参碱以浓度依赖性方式抑制AngⅡ诱导CFb的增殖和胶原合成 (P <0 .0 1) ,②苦参碱可以降低Ⅰ型胶原和TGFβ 1基因mRNA表达 ,③苦参碱可以提高MMP 13基因mRNA表达。结论 :苦参碱通过抑制AngⅡ诱导的CFb增殖和胶原合成增加 。

苦参碱抑制血小板衍生生长因子诱导的小鼠皮肤成纤维细胞增殖

目的 :探讨苦参碱对血小板衍生生长因子 - BB(PDGF- BB)诱导的小鼠成纤维细胞增殖的影响。方法 :取新生 ICR小鼠皮肤细胞培养成纤维细胞。用四甲基偶氮唑盐 (MTT)法和细胞计数法分析细胞增殖情况。结果 :5 0～ 2 5 0 μg/ ml的苦参碱能剂量依赖地降低血清刺激的细胞增殖 ,撤除苦参碱后抑制作用能完全逆转。苦参碱 (10 0～ 5 0 0 μg/ ml)亦能剂量依赖地抑制PDGF- BB诱导的细胞增殖。结论 :苦参碱显示了很强的抗小鼠皮肤成纤维细胞增殖的作用 ,可能通过抑制 PDGF- BB诱导增殖作用来介导的。提示苦参碱可能对皮肤纤维化疾病有潜在的预防和治疗作用。

瘦素对体外大鼠成纤维细胞增殖与胶原合成的影响

目的 研究瘦素对体外培养大鼠成纤维细胞 (fibroblast,FB)增殖与胶原合成的影响 ,以阐明 FB介导瘦素在大鼠皮肤创伤愈合中的促进作用。 方法 体外培养乳鼠真皮 FB,通过 MTT比色分析法、3H-胸腺嘧啶核苷(3H- Td R)和 3H-脯氨酸 (3H- Pro)掺入法观察不同浓度的瘦素 ,分别为 0、10、5 0、10 0、2 0 0及 4 0 0 ng/ ml对其增殖和胶原合成的影响。 结果 瘦素剂量在 4 0 0 ng/ ml以下时 ,随瘦素剂量增加明显增加了体外培养大鼠 FB MTT的光密度值和 3H- Td R的掺入量。3H- Pro的掺入量随瘦素剂量增加基本呈增大趋势。 2 0 0、4 0 0 ng/ ml剂量组的3H- Td R掺入量 379±10 1cpm、32 6± 33cpm,与对照组 2 19± 5 6 cpm比较有统计学差异 (P<0 .0 5 ) ;且 2 0 0、4 0 0 ng/ ml剂量组的 MTT吸光度(A)值 0 .0 82± 0 .0 13、0 .0 91± 0 .0 18与对照组 0 .0 6 3± 0 .0 10比较有统计学差异 (P<0 .0 5 ) ;2 0 0、4 0 0 ng/ ml剂量组的 3H- Pro掺入量 911± 5 5 cpm、10 72± 2 5 9cpm,与对照组 6 79± 176 cpm比较有统计学差异 (P<0 .0 5 )。 结论 瘦素促进了 FB的增殖和胶原蛋白的合成 ,这可能是瘦素发挥促进大鼠皮肤愈合作用的途径之一。

苦参碱对醛固酮诱导大鼠心肌成纤维细胞细胞周期和增殖细胞核抗原表达的影响

目的 :研究苦参碱 (Mat)对醛固酮 (Ald)诱导大鼠心肌成纤维细胞 (RCFibs)增殖的影响 ,探讨其抑制心肌纤维化的机制。方法 :利用体外细胞培养技术 ,建立Ald诱导RCFibs纤维化模型 ,通过四氮甲唑蓝 (MTT)比色法测定细胞增殖 ,流式细胞分析仪 (FCM)测定细胞周期及增殖细胞核抗原 (PCNA)的表达、免疫荧光法测定PCNA的表达 ,研究Mat对Ald诱导RCFibs增殖的影响。结果 :Ald +Mat(0 .5mmol·L-1 、0 .2 5mmol·L-1 、0 .1 2 5mmol·L-1 )组与Ald组相比较 ,其细胞增殖抑制率分别为 9.95 6 7%、2 6 .4 6 1 0 %、4 6 .5 90 9% (P <0 .0 5 ) ,细胞周期分析显示G0 G1 期细胞数量增加 ,S期、G2 M1 期明显减少 ;免疫荧光和FCM测定表明 ,Mat抑制PCNA的表达。结论 :Mat能明显抑制Ald诱导的RCFibs增殖 ,其效应呈现剂量依赖性。

苦参碱对人增生性瘢痕成纤维细胞增殖的影响

目的 :研究苦参碱 (Matrine,简称 Mat)对人增生性瘢痕成纤维细胞增殖的影响。 方法 :将 Mat以不同浓度梯度作用于体外培养的增生性瘢痕成纤维细胞 ,测MTT反应的 A0值及 L DH值 ,用免疫组织化学检测 Mat用药前后的细胞核内增殖性抗原 (proliferating cell nuclear antigen,PCNA)的表达。 结果 :增生性瘢痕成纤维细胞在 Mat0 .2 5～ 10 0 m g/m l范围内呈剂量依赖性增殖抑制 ,但 L DH值无明显改变 ;PCNA的表达 ,在 Mat作用后明显减弱。 结论 :Mat在体外能明显抑制增生性瘢痕成纤维细胞的增殖而不引起细胞坏死性改变。

川芎嗪、丹参对心肌成纤维细胞胶原合成和细胞增殖的影响

目的 :为了研究川芎嗪、丹参两味中药对体外培养心肌成纤维细胞 (fibroblasts,Fbs)的胶原合成与细胞增殖的影响。方法 :采用胶原酶和胰蛋白酶消化SD大鼠的心肌组织块 ,制备成纤维细胞的单细胞悬液 ,按不同药物及药物的不同浓度分组研究它们对成纤维细胞的胶原合成和增殖影响。结果 :中、高浓度的川芎嗪、丹参能有效地抑制成纤维细胞的胶原合成和增殖。低浓度的川芎嗪、丹参能对抗去甲肾上腺素对成纤维细胞的胶原合成与细胞增殖。结论 :川芎嗪、丹参能抑制成纤维细胞的胶原合成与细胞增殖。这些效应的机制可能与它们的钙离子拮抗有关。

三七总甙对人增生性瘢痕成纤维细胞增殖及胶原合成的作用

目的 观察三七总甙对体外培养的人增生性瘢痕成纤维细胞增殖及胶原合成的作用 ,以寻找治疗人增生性瘢痕的有效药物。方法 体外培养人增生性瘢痕成纤维细胞 ,分别应用MTT比色法和3H 脯氨酸掺入法检测三七总甙作用后细胞增殖及胶原合成的变化。结果 和对照组相比 ,三七总甙能够显著抑制成纤维细胞增殖及胶原合成 (P <0 0 1)。结论 三七总甙具有体外抗纤维化作用 。

川芎嗪对溶血磷脂酸诱导的心脏成纤维细胞增殖及胶原合成的影响

目的:观察溶血磷脂酸(LPA)对体外培养的心脏成纤维细胞(CF)增殖的影响,进一步研究中药川芎嗪单体对其的干预作用。方法:用消化法培养新生SD大鼠心脏成纤维细胞,用单四唑(MTT)比色法测定细胞增殖,羟脯氨酸碱水解法测定胶原合成,分别观察不同浓度LPA对CF增殖和胶原合成的影响及川芎嗪的干预作用。结果:随着LPA浓度的升高,MTT比色法A490值呈上升趋势。CF分泌的胶原随着LPA浓度和作用时间的增加呈递增趋势。20μg/m l的川芎嗪作用48 h即能明显抑制LPA(10-6μmol/L)诱导的细胞增殖作用(P<0.05)。结论:LPA具有促进SD新生大鼠CF增殖和胶原合成作用,而川芎嗪能对其产生明显的抑制作用,并呈浓度依赖性。

牛磺酸对成纤维细胞增殖及功能的影响

目的：观察牛磺酸对３Ｔ３细胞的增殖及其产生胶原和透明质酸的影响。方法：采用［３Ｈ］－胸腺嘧啶（［３Ｈ］－ＴｄＲ）、［３Ｈ］－脯氨酸（［３Ｈ］－Ｐｒｏ）掺入和放射免疫分析法分别测定细胞增殖、胶原和透明质酸合成。结果：牛磺酸能显著抑制３Ｔ３细胞的［３Ｈ］－ＴｄＲ和［３Ｈ］－Ｐｒｏ掺入，并呈时间、剂量依赖关系；对透明质酸的合成亦具有剂量依赖的抑制作用。此外，牛磺酸还明显提高细胞内ｃＡＭＰ水平。结论：牛磺酸能显著抑制３Ｔ３细胞增殖及胶原和透明质酸合成，其机理可能与促进ｃＡＭＰ生成有关。

丹酚酸A对成纤维细胞活力、增殖及胶原合成的影响

目的:探讨丹酚酸A对成纤维细胞增殖及胶原合成的影响。方法:常规培养NIH/3T3成纤维细胞,10^(-4)～10^(-7)mol/L丹酚酸A温育亚单层细胞22h。[~3H]-TdR掺入法测定细胞增殖,[~3H]-proline掺入法测定细胞活力,[~3H]-proline掺入、胶原酶消化法测定细胞内外胶原生成率。结果:10^(-4)～10^(-6)mol/L丹酚酸A抑制细胞增殖,除10^(-4)mol/L丹酚酸A组细胞[~3H]-proline掺入量下降,有一定细胞毒性外,其余各组均有促进细胞活力的趋势,以10^(-6)mol/L组最为明显。10^(-4)～10^(-7)mol/L丹酚酸A抑制细胞内胶原合成率,以10^(-6)mol/L作用稍强,但对细胞外胶原的分泌均无明显影响。结论:丹酚酸A能抑制成纤维细胞增殖及细胞内胶原合成,体外最佳作用浓度为10^(-6)mol/L。

苦参碱抑制大鼠肺成纤维细胞增殖及其机制

目的观察苦参碱(Mat)对大鼠肺成纤维细胞增殖及纤维连接蛋白(Fibronectin,FN)表达的影响。方法体外培养新生Wistar大鼠的肺成纤维细胞,倒置显微镜下观察活细胞形态;四氮唑盐(MTT)比色法检测细胞增殖,流式细胞分析仪测定细胞周期;免疫荧光测定FN的蛋白含量。结果不同浓度苦参碱处理36h后,细胞MTT-OD值呈递减趋势,S期细胞百分率下降,G0/G1期百分率上升,FN的表达下降,且成剂量依赖性,与空白组相比,差异有显著性(P<0.01)。结论苦参碱可抑制大鼠肺成纤维细胞增殖,其作用与降低FN表达有关。