脂质组学分析揭示了自我认定的非裔美国癌症患者与非西班牙裔白人癌症患者肿瘤之间的生物学差异。

Lipidomic Profiling Reveals Biological Differences between Tumors of Self-Identified African Americans and Non-Hispanic Whites with Cancer.

作者信息

Boyd April E, Grizzard Pamela J, Hylton Rorie Katherine, Lima Santiago

机构信息

Department of Biology, Virginia Commonwealth University, Richmond, VA 23284, USA.

Tissue and Data Acquisition and Analysis Core, Virginia Commonwealth University, Richmond, VA 23298, USA.

出版信息

Cancers (Basel). 2023 Apr 11;15(8):2238. doi: 10.3390/cancers15082238.

Abstract

In the US, the incidence and mortality of many cancers are disproportionately higher in African Americans (AA). Yet, AA remain poorly represented in molecular studies investigating the roles that biological factors might play in the development, progression, and outcomes of many cancers. Given that sphingolipids, key components of mammalian cellular membranes, have well-established roles in the etiology of cancer progression, malignancy, and responses to therapy, we conducted a robust mass spectrometry analysis of sphingolipids in normal adjacent uninvolved tissues and tumors of self-identified AA and non-Hispanic White (NHW) males with cancers of the lung, colon, liver, and head and neck and of self-identified AA and NHW females with endometrial cancer. In these cancers, AA have worse outcomes than NHW. The goal of our study was to identify biological candidates to be evaluated in future preclinical studies targeting race-specific alterations in the cancers of AA. We have identified that various sphingolipids are altered in race-specific patterns, but more importantly, the ratios of 24- to 16-carbon fatty acyl chain-length ceramides and glucosylceramides are higher in the tumors of AA. As there is evidence that ceramides with 24-carbon fatty acid chain length promote cellular survival and proliferation, whereas 16-carbon chain length promote apoptosis, these results provide important support for future studies tailored to evaluate the potential roles these differences may play in the outcomes of AA with cancer.

摘要

在美国,许多癌症的发病率和死亡率在非裔美国人(AA)中不成比例地更高。然而,在研究生物因素可能在许多癌症的发生、发展和转归中所起作用的分子研究中,非裔美国人的代表性仍然很低。鉴于鞘脂是哺乳动物细胞膜的关键成分,在癌症进展、恶性肿瘤及对治疗的反应的病因学中具有公认的作用,我们对自我认定为非裔美国人和非西班牙裔白人(NHW)的男性肺癌、结肠癌、肝癌和头颈癌患者以及自我认定为非裔美国人和非西班牙裔白人的女性子宫内膜癌患者的正常相邻未受累组织和肿瘤中的鞘脂进行了强有力的质谱分析。在这些癌症中,非裔美国人的转归比非西班牙裔白人更差。我们研究的目的是确定生物候选物,以便在未来针对非裔美国人癌症中种族特异性改变的临床前研究中进行评估。我们已经确定,各种鞘脂以种族特异性模式发生改变,但更重要的是,在非裔美国人的肿瘤中,24碳与16碳脂肪酸酰基链长度的神经酰胺和葡糖神经酰胺的比例更高。由于有证据表明,具有24碳脂肪酸链长度的神经酰胺促进细胞存活和增殖,而16碳链长度的神经酰胺促进细胞凋亡,这些结果为未来的研究提供了重要支持,这些研究旨在评估这些差异可能在非裔美国人癌症转归中所起的潜在作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d266/10136787/cf782a0b9e94/cancers-15-02238-g001.jpg

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