title: Reduced expression of PDCD5 is associated with high-grade astrocytic gliomas.
abstract: Programmed cell death 5 (PDCD5) is a novel apoptosis-promoting protein. Recently, a decreased expression of PDCD5 has been found in several types of human tumors. However, the expression level of PDCD5 in human gliomas has not been investigated. In the present study, we examined the expression of PDCD5 in 88 human glioma samples at both mRNA and protein levels by RT-PCR, Western blotting and immunohistochemistry. We found that 53.3% (16/30) of the glioma samples had a reduced expression of PDCD5 mRNA and 70.5% (62/88) had a reduced expression of the PDCD5 protein as compared to normal brain tissue. Furthermore, we studied the correlation of the expression level of PDCD5 with the clinicopathological grade and survival of patients with astrocytomas. Although longitudinal studies of a cohort of patients with astrocytoma revealed that PDCD5 expression was not able to predict clinical outcome (p>0.05), a decreased expression of PDCD5 correlated significantly with high-grade astrocytomas (p<0.001). In conclusion, our data suggest that reduced PDCD5 expression may contribute to the pathogenesis of human gliomas.
authors.affiliation: Institute of Immunology, School of Medicine, Shandong University, Jinan, Shandong, P.R. China.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Li
authors.forename: Qun
authors.initials: Q
authors.lastname: Wang
authors.forename: Fei
authors.initials: F
authors.lastname: Gao
authors.forename: Faliang
authors.initials: F
authors.lastname: Zhu
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Wang
authors.forename: Chengjun
authors.initials: C
authors.lastname: Zhou
authors.forename: Chunmei
authors.initials: C
authors.lastname: Liu
authors.forename: Yingyu
authors.initials: Y
authors.lastname: Chen
authors.forename: Chunhong
authors.initials: C
authors.lastname: Ma
authors.forename: Wensheng
authors.initials: W
authors.lastname: Sun
authors.forename: Lining
authors.initials: L
authors.lastname: Zhang
mesh_terms: D000328:Adult; D051017:Apoptosis Regulatory Proteins / Q000235:genetics / Q000378:metabolism*; D001254:Astrocytoma / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D015153:Blotting, Western; D001932:Brain Neoplasms / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D008297:Male; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism*; D009367:Neoplasm Staging; D011379:Prognosis; D012333:RNA, Messenger; D020133:Reverse Transcriptase Polymerase Chain Reaction; D015996:Survival Rate; D014407:Tumor Cells, Cultured
chemical_list: D051017:Apoptosis Regulatory Proteins; D009363:Neoplasm Proteins; C117283:PDCD5 protein, human; D012333:RNA, Messenger