Children's Cancer Research Center, Martin-Luther-University Halle-Wittenberg, University Clinic and Polyclinic for Child and Adolescent Medicine, Halle, Germany.
Cancer Sci. 2009 Dec;100(12):2383-9. doi: 10.1111/j.1349-7006.2009.01347.x. Epub 2009 Sep 4.
Despite improvements in the treatment of patients with Ewing family tumors (EFT), the prognosis for patients with advanced disease is still unsatisfactory. Recently, we identified lipase I as an EFT-associated gene that might be interesting for the development of new immunological or pharmacological treatment strategies. Lipase I is a member of the large protein superfamilies of alpha/beta hydrolases and serine hydrolases. In the present paper we describe high expression of another member of these superfamilies in EFT. By DNA microarray data base mining we found exceptional high expression of alpha/beta hydrolase domain containing 6 (ABHD6) in EFT but not in other sarcomas. Expression of ABHD6 in EFT correlated with expression of another EFT-associated gene, aristaless. Analysis of ABHD6-associated GGAA microsatellites revealed shorter microsatellites in EFT with lack of ABHD6 expression. ABHD6 homologues were found in varying chordata but not in other animal species. Based on homology modeling we predicted the 3D-structure of ABHD6, which shows high similarity with bacterial homoserine transacetylases. High expression of ABHD6 in EFT in comparison to normal tissues and other tumors suggests that ABHD6 might be an interesting new diagnostic or therapeutic target for EFT. However, knock down of ABHD6 in EFT cells did not inhibit tumor cell growth.
尽管在治疗尤文氏家族肿瘤(EFT)患者方面取得了进展,但晚期疾病患者的预后仍然不尽如人意。最近,我们发现脂肪酶 I 是一种与 EFT 相关的基因,可能对开发新的免疫或药理学治疗策略很有意义。脂肪酶 I 是大型α/β水解酶和丝氨酸水解酶蛋白超家族的成员。在本文中,我们描述了这些超家族的另一个成员在 EFT 中的高表达。通过 DNA 微阵列数据库挖掘,我们发现 ABHD6 在 EFT 中表达异常高,而在其他肉瘤中则没有。ABHD6 在 EFT 中的表达与另一个与 EFT 相关的基因 aristaless 的表达相关。对 ABHD6 相关的 GGAA 微卫星的分析显示,在缺乏 ABHD6 表达的 EFT 中存在较短的微卫星。在不同的脊索动物中发现了 ABHD6 同源物,但在其他动物物种中则没有。基于同源建模,我们预测了 ABHD6 的 3D 结构,它与细菌高丝氨酸转乙酰酶具有高度相似性。ABHD6 在 EFT 中的高表达与正常组织和其他肿瘤相比,表明 ABHD6 可能是 EFT 的一个有趣的新诊断或治疗靶点。然而,ABHD6 在 EFT 细胞中的敲低并没有抑制肿瘤细胞的生长。