Abstract:
BACKGROUND:SPINK4 is known as a gastrointestinal peptide in the gastrointestinal tract and is abundantly expressed in human goblet cells. The clinical significance of SPINK4 in colorectal cancer (CRC) is largely unknown. METHODS:We retrieved the expression data of 1168 CRC patients from 3 Gene Expression Omnibus (GEO) datasets (GSE24551, GSE39582, GSE32323) and The Cancer Genome Atlas (TCGA) to compare the expression level of SPINK4 between CRC tissues and normal colorectal tissues and to evaluate its value in predicting the survival of CRC patients. At the protein level, these results were further confirmed by data mining in the Human Protein Atlas and by immunohistochemical staining of samples from 81 CRC cases in our own center. RESULTS:SPINK4 expression was downregulated in CRC compared with that in normal tissues, and decreased SPINK4 expression at both the mRNA and protein levels was associated with poor prognosis in CRC patients from all 3 GEO datasets, the TCGA database and our cohort. Additionally, lower SPINK4 expression was significantly related to higher TNM stage. Moreover, in multivariate regression, SPINK4 was confirmed as an independent indicator of poor survival in CRC patients in all databases and in our own cohort. CONCLUSIONS:We concluded that reduced expression of SPINK4 relates to poor survival in CRC, functioning as a novel indicator.
journal_name
BMC Cancerjournal_title
BMC cancerauthors
Wang X,Yu Q,Ghareeb WM,Zhang Y,Lu X,Huang Y,Huang S,Sun Y,Lin J,Liu J,Chi Pdoi
10.1186/s12885-019-6484-5subject
Has Abstractpub_date
2019-12-30 00:00:00pages
1258issue
1issn
1471-2407pii
10.1186/s12885-019-6484-5journal_volume
19pub_type
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