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Investigation of the activities of annexin a1 protein and serine proteases from bothrops in regulation of angiogenesis process: experimental model of dorsal skinfold chamber

Grant number: 15/01975-0
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): June 01, 2015
Effective date (End): November 30, 2016
Field of knowledge:Biological Sciences - Morphology - Histology
Principal Investigator:Sonia Maria Oliani
Grantee:Rafaela Batista Molás Mendes
Host Institution: Instituto de Biociências, Letras e Ciências Exatas (IBILCE). Universidade Estadual Paulista (UNESP). Campus de São José do Rio Preto. São José do Rio Preto , SP, Brazil


Angiogenesis is the formation of new blood vessels from pre-existing vasculature, and the vascular endothelial growth factor (VEGF) is a key regulator in this process, being a survival factor for endothelial cells, stimulating the origin of new microvascular network. The angiogenesis process is extremely necessary for the success of transplants, regeneration and repair of damaged tissues, post-ischemic recovery and wound healing. Thus, understanding the growth intensification of new microvascular systems is critical to new therapeutic strategies. Recent studies have shown that the protein Annexin A1 (ANXA1) is involved on regulation of inflammation, apoptosis, cell growth, differentiation and also in the balance between physiological and pathological angiogenesis. In vivo investigations of our research group showed that ANXA1 can act as an inducer of physiological angiogenesis, as well as serine proteases from Bothrops whose data were noted in recent vitro studies. With these considerations, our aim is to investigate, in vivo, the process of angiogenesis after prior/current treatment with ANXA1 and serine proteases from Bothrops brazili and atrox. The effects of ANXA1 and serine proteases on the kinetics of formation of new vessels in the microcirculatory network will be investigated in experimental models of dorsal chambers implantation in Balb/c wild mice. Although some investigations identify the involvement of ANXA1 and serine proteases in the regulation of angiogenesis, the exact role in physiology is not fully understood. Thus, our studies may reveal important functions of these mediators in this process, which involves proliferation and differentiation of endothelial cells, extracellular matrix and surrounding cells.

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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)
MOLAS, RAFAELA BATISTA; DE PAULA-SILVA, MARINA; MASOOD, REHANA; ULLAH, ANWAR; GIMENES, ALEXANDRE DANTAS; OLIANI, SONIA MARIA. AC(2-26) peptide and serine protease of Bothrops atrox similarly induces angiogenesis without triggering local and systemic inflammation in a murine model of dorsal skinfold chamber. Toxicon, v. 137, p. 7-14, . (15/01975-0, 16/02012-4)

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