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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Apoptosis-associated protein expression in human salivary gland morphogenesis

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Author(s):
Teshima, Tathyane H. N. ; Ianez, Renata C. F. ; Coutinho-Camillo, Claudia M. ; Tucker, Abigail S. ; Lourenco, Silvia V.
Total Authors: 5
Document type: Journal article
Source: ARCHIVES OF ORAL BIOLOGY; v. 69, p. 71-81, SEP 2016.
Web of Science Citations: 7
Abstract

Objective: Salivary gland (SG) development is based on branching morphogenesis, in which programmed cell death has been proposed to play a role in cell signalling and organ shaping. In the mouse salivary gland apoptosis has been suggested to play a key role in lumen formation, removing the central cells of the epithelial stalks. Here we analyse the expression of several anti- and pro-regulators of apoptosis during human SG development in a range of developmental stages. Design: Foetal SGs obtained from the University of Sao Paulo were analysed by immunohistochemistry to assess the expression of apoptosis-associated proteins: caspases (caspase-6, -7, -9 and cleaved caspase-3), Bcl-2 family members (Bax, Bak, Bad, Bid, Bcl-2, Bcl-x and Bcl-xL), Survivin (BIRC5), Cytochrome C and Apaf-1. Results: Nuclear expression of Bax and Bak was identified in presumptive luminal areas at initial stages, while Bcl-xL showed the most relevant anti-apoptotic activity. Caspase-6, -7 and -9 were expressed during all stages, while interestingly cleaved caspase-3 showed no prominent expression, indicating that caspase-7 is the main effector. Apoptosome complex components Apaf-1 and Cytochrome C, as well as survivin were all positive in developing glands. Conclusions: The particular expression pattern of several apoptotic regulators in human SG development suggests the existence of a fundamental role for apoptosis during duct formation. The absence of Bad and Bid expressions indicates that the instrinsic pathway is more active then the extrinsic during human gland formation. The subcellular localisation of intrinsic-apoptosis proteins correlated with apoptotic activity, but also suggested additional non-apoptotic functions. (C) 2016 Published by Elsevier Ltd. (AU)

FAPESP's process: 15/02824-6 - Salivary gland development and regeneration: analysis of FGF10 conditional knockout transgenic mice in timed and tissue specific control
Grantee:Tathyane Harumi Nakajima Teshima
Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)
FAPESP's process: 11/18865-2 - Investigation of apoptotic activity in the lumen formation of salivary gland ducts: comparative analysis between animal and human based models
Grantee:Tathyane Harumi Nakajima Teshima
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)