Comparative analysis of STI1 differential expression on transcriptomic profile of pluripotent stem cell

• Grant number: 21/05287-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: July 01, 2021
• End date: December 31, 2021
• Field of knowledge: Biological Sciences - Biology
• Principal Investigator: Marilene Hohmuth Lopes
• Grantee: João Pedro Alves de Araújo
• Host Institution: Instituto de Ciências Biomédicas (ICB). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

Pluripotent stem cells (PSCs) are capable of self-renewing, in addition to differentiating into any cell type of the adult organism, a characteristic known as pluripotency. These abilities are due, in part, to the network of protein homeostasis, or proteostasis, of which the Stress Inducible Protein 1 (STI1) protein stands out for its dynamism. STI1 is a co-chaperone that assists in many fundamental molecular processes cell maintenance, such as the formation of the protein complex between HSP70 and HSP90 proteins. Still, the expression of STI1 is essential for the survival of mouse embryos. In spite of this, the exact mechanisms of action of STI1, mainly with regard to its role in the early embryonic development and in the maintenance of pluripotency in PSCs, are not yet fully understood. Thus, the present project proposes to analyze comparatively the transcriptional profile of PSCs with differential expression of STI1, seeking to elucidate molecular mechanisms, signaling pathways and genes of interest directly or indirectly impacted by the variation in the levels of this co-chaperone. The in silico study of data obtained from RNA sequencing and the subsequent validation of selected genes of interest will be fundamental to obtain more information about the activity of STI1 in the transcriptome of PSCs, contributing in a relevant way to the understanding of how proteostasis influences the maintenance of pluripotency.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

IGLESIA, REBECA PIATNICZKA; PRADO, MARIANA BRANDAO; ALVES, RODRIGO NUNES; ESCOBAR, MARIA ISABEL MELO; FERNANDES, CAMILA FELIX DE LIMA; FORTES, AILINE CIBELE DOS SANTOS; SOUZA, MARIA CLARA DA SILVA; BOCCACINO, JACQUELINE MARCIA; CANGIANO, GIOVANNI; SOARES, SAMUEL RIBEIRO; et al. Unconventional Protein Secretion in Brain Tumors Biology: Enlightening the Mechanisms for Tumor Survival and Progression. FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY, v. 10, p. 17-pg., 2022-06-15. (21/05287-2, 21/13114-0, 18/15557-4, 19/14741-9, 19/11097-1, 20/03714-8, 20/04687-4, 19/12710-9, 17/26158-0, 20/07450-5, 19/06971-4, 20/05443-1, 21/13070-3)

FERNANDES, CAMILA FELIX DE LIMA; COELHO, BARBARA PARANHOS; SOUZA, MARIA CLARA DA SILVA; BOCCACINO, JACQUELINE MARCIA; SOARES, SAMUEL RIBEIRO; DE ARAUJO, JAO PEDRO ALVES; MELO-ESCOBAR, MARIA ISABEL; LOPES, MARILENE HOHMUTH. Extracellular vesicles throughout development: A potential roadmap for emerging glioblastoma therapies. SEMINARS IN CELL & DEVELOPMENTAL BIOLOGY, v. 133, p. 10-pg., 2023-01-15. (21/13070-3, 19/14952-0, 19/11097-1, 19/14741-9, 20/05443-1, 18/15557-4, 21/05287-2, 20/07450-5)