The immunohistochemical expression of stress-response protein (srp) 60 in human brain tumours: Relationship of srp 60 to the other five srps, proliferating cell nuclear antigen and p53 protein
Keywords:
brain tumours, stress-response protein 60, Stress-response proteins (heat-shock proteins), proliferating cell nuclear antigen, p53 proteinAbstract
This study analyzed the expression of stressresponse (heat-shock) protein 60 (srp 60) in a series of 158 human brain tumours. Immunohistochemical procedures were employed; cells of the human cervical cancer line HeLa S3 exposed to hyperosmolar stress served as positive controls. Deposits of reaction products were found in the cytoplasm. Approximately half of the glioblastomas multiforme (17/31), breast carcinoma metastases (6/10), and lung carcinoma metastases (5111) as well as about one-third of the astrocytomas (5113) and meningiomas (8123) had tumour cells that expressed srp 60. A positive reaction for srp 60 was also seen in some medulloblastomas (2/16), primitive neuroectodermal tumours (PNETs) (2/11), schwannomas (2121), and pituitary adenomas (2/7), but no positive reactions were observed with oligodendrogliomas and ependymomas. Compared with srp 60-negative tumours, srp 60-positive tumours coexpressed one or more stress-related proteins, among which srp 90, srp 72, srp 27, alphaB-crystallin and ubiquitin occurred with higher frequencies; a high correlation between srp 60 and the other five srps (0.88 - 0.97, pe0.01, Pearson correlation coefficient) was observed in srp 60-positive tumours. In contrast, the correlation coefficient in srp 60-negative tumours was not significant (-0.26 - 0.71). There was a tendency for the proliferating cell nuclear antigen (PCNA)-labeling index to be higher in glioblastomas, astrocytornas, medulloblastomas, PNETs, and breast and lung carcinoma metastases that expressed srp 60 than in those that did not. No significant immunohistochemical reactions of srp 60, PCNA and p53 protein were seen with sections of normal brain tissues. We conclude that primary and metastatic tumours of the brain produce srp 60 and that srp 60 in certain brain tumour cells may coexpress the other five srps. In addition, srp 60 expression might depend, in part, on proliferating potential.Downloads
Issue
Section
License
Las obras que se publican en esta revista están sujetas a los siguientes términos:
1. El Servicio de Publicaciones de la Universidad de Murcia (la editorial) conserva los derechos patrimoniales (copyright) de las obras publicadas, y favorece y permite la reutilización de las mismas bajo la licencia de uso indicada en el punto 2.
2. Las obras se publican en la edición electrónica de la revista bajo una licencia Creative Commons Reconocimiento-NoComercial-SinObraDerivada 3.0 España (texto legal). Se pueden copiar, usar, difundir, transmitir y exponer públicamente, siempre que: i) se cite la autoría y la fuente original de su publicación (revista, editorial y URL de la obra); ii) no se usen para fines comerciales; iii) se mencione la existencia y especificaciones de esta licencia de uso.
3. Condiciones de auto-archivo. Se permite y se anima a los autores a difundir electrónicamente las versiones pre-print (versión antes de ser evaluada) y/o post-print (versión evaluada y aceptada para su publicación) de sus obras antes de su publicación, ya que favorece su circulación y difusión más temprana y con ello un posible aumento en su citación y alcance entre la comunidad académica. Color RoMEO: verde.