Dong Wei1, Jing-Jing Peng1, Hui Gao1, Tao Zhang1, Yong Tan1, Yong-He Hu2. 1. Department of Oncology, Chengdu Military General Hospital, Chengdu, Sichuan, 610083, P.R. China. 2. Department of Traditional Chinese Medicine, Chengdu Military General Hospital, Chengdu, Sichuan, 610083, P.R. China. Electronic address: weizheng72@163.com.
Abstract
PURPOSE: Aldehyde dehydrogenase 1 (ALDH1) has been identified as a putative cancer stem cell (CSC) marker in lung cancer. However, the clinicopathological and prognostic value of this protein in lung cancer patients remains controversial. Thus, we performed a systematic review and meta-analysis of studies assessing the clinical and prognostic significance of ALDH1 expression in lung cancer. METHODS: An identification and review of publications assessing clinical or prognostic significance of ALDH1 expression in lung cancer until September 1, 2014 was undertaken. A meta-analysis was performed to clarify the association between ALDH1 expression and clinical outcomes. RESULTS: A total of 14 publications met the criteria and comprised 1926 cases. Analysis of these data showed that ALDH1 expression was not significantly associated with the patient age (OR = 0.82, 95% confidence interval [CI]: 0.45-1.50, P=0.52), tumour size (OR=0.68, 95% CI: 0.22-2.06, P=0.49), smoking status (OR=1.37, 95% CI: 0.85-2.22, P=0.19), or tumour grade (OR=1.65, 95% CI: 0.83-3.26, P=0.15). However, in the identified studies, ALDH1 expression was highly correlated with lymph node metastasis (OR=1.97, 95% CI: 1.16-3.34, P=0.01), tumour TNM staging (OR=1.68, 95% CI 1.28-2.22, P=0.0002), decreased overall survival (relative risk [RR]: 1.97,95% CI: 1.16-3.34, P =0.01) and decreased disease free survival (RR: 1.63, 95% CI: 1.01-2.64, P=0.05). CONCLUSIONS: This meta-analysis shows ALDH1 expression in lung cancer is connected with decreased overall and disease free survival and thus marks a worse prognosis.
PURPOSE:Aldehyde dehydrogenase 1 (ALDH1) has been identified as a putative cancer stem cell (CSC) marker in lung cancer. However, the clinicopathological and prognostic value of this protein in lung cancerpatients remains controversial. Thus, we performed a systematic review and meta-analysis of studies assessing the clinical and prognostic significance of ALDH1 expression in lung cancer. METHODS: An identification and review of publications assessing clinical or prognostic significance of ALDH1 expression in lung cancer until September 1, 2014 was undertaken. A meta-analysis was performed to clarify the association between ALDH1 expression and clinical outcomes. RESULTS: A total of 14 publications met the criteria and comprised 1926 cases. Analysis of these data showed that ALDH1 expression was not significantly associated with the patient age (OR = 0.82, 95% confidence interval [CI]: 0.45-1.50, P=0.52), tumour size (OR=0.68, 95% CI: 0.22-2.06, P=0.49), smoking status (OR=1.37, 95% CI: 0.85-2.22, P=0.19), or tumour grade (OR=1.65, 95% CI: 0.83-3.26, P=0.15). However, in the identified studies, ALDH1 expression was highly correlated with lymph node metastasis (OR=1.97, 95% CI: 1.16-3.34, P=0.01), tumour TNM staging (OR=1.68, 95% CI 1.28-2.22, P=0.0002), decreased overall survival (relative risk [RR]: 1.97,95% CI: 1.16-3.34, P =0.01) and decreased disease free survival (RR: 1.63, 95% CI: 1.01-2.64, P=0.05). CONCLUSIONS: This meta-analysis shows ALDH1 expression in lung cancer is connected with decreased overall and disease free survival and thus marks a worse prognosis.
Authors: Nasim Khosravi; Mauricio S Caetano; Amber M Cumpian; Nese Unver; Cynthia De la Garza Ramos; Oscar Noble; Soudabeh Daliri; Belinda J Hernandez; Berenice A Gutierrez; Scott E Evans; Samir Hanash; Andrei M Alekseev; Yi Yang; Seon Hee Chang; Roza Nurieva; Humam Kadara; Jichao Chen; Edwin J Ostrin; Seyed Javad Moghaddam Journal: Cancer Immunol Res Date: 2018-05-15 Impact factor: 11.151
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