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Comparison of Expression and Proliferative Effect of Pituitary Adenylate Cyclase-Activating Polypeptide (PACAP) and its Receptors on Human Astrocytoma Cell Lines
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Comparison of Expression and Proliferative Effect of Pituitary Adenylate Cyclase-Activating Polypeptide (PACAP) and its Receptors on Human Astrocytoma Cell Lines
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Comparison of Expression and Proliferative Effect of Pituitary Adenylate Cyclase-Activating Polypeptide (PACAP) and its Receptors on Human Astrocytoma Cell Lines
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Journal Article
Comparison of Expression and Proliferative Effect of Pituitary Adenylate Cyclase-Activating Polypeptide (PACAP) and its Receptors on Human Astrocytoma Cell Lines
2014
Overview
Pituitary adenylate cyclase-activating polypeptide (PACAP) is a pleiotropic neuropeptide considered to be a potent regulator of astrocytes. It has been reported that PACAP also affects astrocytoma cell properties, but the proliferative effects of this peptide in previous reports were inconsistent. The purpose of this study was to search for correlations between malignant potential, PACAP/PACAP receptor expression, and the proliferative potential of four astrocytoma cell lines (KNS-81, KINGS-1, SF-126, and YH-13). Immunohistochemical observations were performed using astrocyte lineage markers with a view to establishing malignant potential, which is inversely correlated to differentiation status in astrocytoma cells. YH-13 showed the most undifferentiated astrocyte-like status, and was immunopositive to a cancer stem cell marker, CD44. These observations suggest that YH-13 is the most malignant of the astrocytoma cell lines tested. Moreover, the strongest PAC1-R immunoreactivity was observed in YH-13 cells. Using real-time PCR analysis, no significant differences among cell lines were detected with respect to PACAP mRNA, but PAC1-R and VPAC1-R mRNA levels were significantly increased in YH-13 cells compared with the other cell lines. Furthermore, when cell lines were treated with PACAP (10
−11
M) for 3 days, the YH-13 cell line, but not of the other cell lines, exhibited a significantly increased cell number. These results suggest that PACAP receptor expression is correlated with the malignant and proliferative potential of astrocytoma cell lines.
Publisher
Springer US,Springer Nature B.V
Subject
/ Biomedical and Life Sciences
/ Humans
/ Pituitary Adenylate Cyclase-Activating Polypeptide - genetics
/ Pituitary Adenylate Cyclase-Activating Polypeptide - metabolism
/ Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide, Type I - genetics
/ Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide, Type I - metabolism
/ Receptors, Vasoactive Intestinal Polypeptide, Type I - genetics
/ Receptors, Vasoactive Intestinal Polypeptide, Type I - metabolism
/ Tumors
