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-cis
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retinoic
acid    
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    Methods Four bladder cancer cell lines and two retinoids,all-trans-retinoic acid (ATRA),9-cis retinoic acid (9cRA),combined with interferon α-2a(IFN),were used in the study. The abilities of these agents to inhibit growth,induce apoptosis were compared and the expression of nuclear retinoid receptors,Stat1 protein were measured by means of TUNEL,FCM,RT-PCR and Western blot.
    方法 应用全反式维甲酸 (ATRA)、9 顺式维甲酸 (9cRA)、联合干扰素α 2a(IFNα 2a)作用于 4组膀胱癌细胞 ,应用TUNEL、FCM、RT PCR及Western等技术观察维甲酸、干扰素单独或联合应用时对不同膀胱癌细胞株的生长抑制、诱导凋亡作用以及核维甲酸类受体、Stat1蛋白等方面的改变。
短句来源
    Methods:Four bladder cancer cell lines,grade 1 to 3,and two retinoids,all-trans-retinoic acid(ATRA),9-cis retinoic acid(9cRA),combined with interferon α-2a(INF),were used in the study. We compared the competence of these agents to inhibit growth,induce apoptosis,affect the expression of nuclear retinoid receptors,and modulate STAT1 protein.
    方法 :应用全反式维甲酸 (ATRA)和 9-顺式维甲酸 (9cRA)联合干扰素α 2a(IFNα 2a)作用于 4组膀胱癌细胞 ,运用TUN NEL、FCM、RT PCR及Western等技术观察维甲酸、干扰素单独或联合应用对不同膀胱癌细胞株的生长抑制、诱导凋亡的影响以及核维甲酸类受体、STAT1蛋白等方面的改变。
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  -cis retinoic acid
In view of these results, 9-cis retinoic acid or stable analogues of this retinoid may have potential for the treatment of neuroblastoma.
      
A retinoid X receptor (RXR)-specific analogue of 9-cis retinoic acid had similar effects on gene expression to 9-cis retinoic acid alone.
      
RAR-β, a gene which may mediate retinoic acid responsiveness and be of prognostic significance, is also more-effectively induced by 9-cis retinoic acid.
      
In vivo, 13-cis will isomerise to both all-trans and 9-cis retinoic acid, believed to be the main biologically-active isomers.
      
9-cis retinoic acid - a better retinoid for the modulation of differentiation, proliferation and gene expression in human neurob
      
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Objective To investigate the effects of combination of retinoids and interferon α-2a on growth inhibition and apoptosis induction in bladder cancer cell lines. Methods Four bladder cancer cell lines and two retinoids,all-trans-retinoic acid (ATRA),9-cis retinoic acid (9cRA),combined with interferon α-2a(IFN),were used in the study.The abilities of these agents to inhibit growth,induce apoptosis were compared and the expression of nuclear retinoid receptors,Stat1 protein were measured by means of TUNEL,FCM,RT-PCR...

Objective To investigate the effects of combination of retinoids and interferon α-2a on growth inhibition and apoptosis induction in bladder cancer cell lines. Methods Four bladder cancer cell lines and two retinoids,all-trans-retinoic acid (ATRA),9-cis retinoic acid (9cRA),combined with interferon α-2a(IFN),were used in the study.The abilities of these agents to inhibit growth,induce apoptosis were compared and the expression of nuclear retinoid receptors,Stat1 protein were measured by means of TUNEL,FCM,RT-PCR and Western blot. Results Most of the bladder cancer cell lines were resistant to the effect of ATRA and 9cRA on growth inhibition and apoptosis induction.The effects of ATRA and 9cRA on cell growth and apoptosis were enhanced by IFN α-2a.Combination of ATRA and IFN α-2a induced RARβ and Stat 1 expression in three bladder cancer cell lines. Conclusions INF α-2a synergizes with the inhibitory effect of ATRA and 9cRA on the growth inhibition and apoptosis of bladder cancer cells in vitro,up-regutation of Stat1 gene expression could be the main molecular mechanism.

目的 探讨联合应用维甲酸和干扰素对人膀胱癌细胞生长抑制和诱导凋亡的作用机理。 方法 应用全反式维甲酸 (ATRA)、9 顺式维甲酸 (9cRA)、联合干扰素α 2a(IFNα 2a)作用于 4组膀胱癌细胞 ,应用TUNEL、FCM、RT PCR及Western等技术观察维甲酸、干扰素单独或联合应用时对不同膀胱癌细胞株的生长抑制、诱导凋亡作用以及核维甲酸类受体、Stat1蛋白等方面的改变。 结果 ATRA和 9cRA对所有膀胱癌细胞的抑制生长和诱导凋亡作用均不明显 ,而IFNα 2a能增强ATRA和9cRA对膀胱癌的这种作用 ,联合应用ATRA和IFNα 2a能诱导膀胱癌细胞RARβ受体和Statl的表达。 结论 IFNα 2a能协同ATRA和 9cRA对膀胱癌细胞生长抑制和凋亡诱导效应 ,上调Stat1基因表达可能是其主要分子学作用机理。

Objective:To identify new favorable agents and develop novel approaches for the chemoprevention and treatment of superficial bladder cancer and investigate the effects of combination of retinoids and interferon α-2a on growth inhibition and apoptosis induction in bladder cancer cell lines. Methods:Four bladder cancer cell lines,grade 1 to 3,and two retinoids,all-trans-retinoic acid(ATRA),9-cis retinoic acid(9cRA),combined with interferon α-2a(INF),were used in the study.We compared the competence...

Objective:To identify new favorable agents and develop novel approaches for the chemoprevention and treatment of superficial bladder cancer and investigate the effects of combination of retinoids and interferon α-2a on growth inhibition and apoptosis induction in bladder cancer cell lines. Methods:Four bladder cancer cell lines,grade 1 to 3,and two retinoids,all-trans-retinoic acid(ATRA),9-cis retinoic acid(9cRA),combined with interferon α-2a(INF),were used in the study.We compared the competence of these agents to inhibit growth,induce apoptosis,affect the expression of nuclear retinoid receptors,and modulate STAT1 protein. Results: Most of the bladder cancer cell lines were resistant to the effect of ATRA and 9cRA on growth inhibition and apoptosis induction,even at higher concentration(10 -5M).The effects of ATRA and 9c RA on cell growth and apoptosis were enhanced by INF α- 2a. Combination of ATRA and IFNα-2a induced RARβ and Stat 1 expression in three bladder cancer cell lines. Conclusion:The results demonstrated that INFα-2a synergize with the inhibitory effect of ATRA and 9c RA on the growth inhibition and apoptosis of bladder cancer cells in vitro,which suggested that it has a potential interest for the treatment of transitional cell carcinoma of bladder.

目的 :研究维甲酸和干扰素联合应用对膀胱癌细胞的生长抑制和诱导凋亡的作用及其可能分子机制。方法 :应用全反式维甲酸 (ATRA)和 9-顺式维甲酸 (9cRA)联合干扰素α 2a(IFNα 2a)作用于 4组膀胱癌细胞 ,运用TUN NEL、FCM、RT PCR及Western等技术观察维甲酸、干扰素单独或联合应用对不同膀胱癌细胞株的生长抑制、诱导凋亡的影响以及核维甲酸类受体、STAT1蛋白等方面的改变。结果 :ATRA和 9cRA对所有膀胱癌细胞的抑制生长和诱导凋亡作用均不明显 ,而IFNα 2a能增强ATRA和 9cRA对膀胱癌的这种作用 ,且联合应用ATRA和IFNα 2a能诱导膀胱癌细胞RARβ和Stat1的表达。结论 :IFNα 2a能协同ATRA和9cRA对膀胱癌细胞生长抑制和凋亡诱导效应 ,上调STAT1基因表达可能是其主要分子机制 ,实验显示了维甲酸和干扰素联合应用治疗膀胱移行细胞癌的协同作用。

 
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