Advanced search
Start date

Tumor-educated platelets and metastasis: relevance of LMWPTP and extracellular vesicles in Colorectal Cancer

Grant number: 18/03593-6
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): November 01, 2018
Effective date (End): August 31, 2021
Field of knowledge:Biological Sciences - Biochemistry - Enzymology
Principal researcher:Carmen Veríssima Ferreira
Grantee:Stefano Piatto Clerici
Home Institution: Instituto de Biologia (IB). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:15/20412-7 - Low molecular weight protein tyrosine phosphatase in colorectal cancer: from the bench to product generation, AP.TEM


About 15-20% of colorectal cancer cases progress to metastasis in other organs reducing the efficiency of current therapy regimens and reducing patient survival. In recent years, research groups have focused on the study of the contribution of Extracellular Vesicles (EVs) in the tumor process. EVs are no longer understood as reservoirs for unwanted proteins and have now been considered as important carrier structures of several biomolecules such as lipids, proteins and oncogenic factors, as well as being a proven cell-to-cell communication. Based on that, in the master project (FAPESP process 2016/02770-6), we verified that Low Molecular Weight Protein Tyrosine Phosphatase (LMWPTP) positively modulates the biogenesis of EVs and their production also has a positive correlation with aggressiveness of Colorectal Cancer Cells (CRC). Other interesting findings were the identification of both mRNA and LMWPTP protein in EVs by our group and the group of Professor Yong Song Gho, respectively. More recently, data obtained in the thematic project (Process FAPESP n° 2015/20412-7) have shown that CRC cells with greater amount of LMWPTP present greater efficiency for the formation of mixed thrombus (platelet-tumor cells). Considering these findings and considering that this phosphatase has a critical participation in the metastasis and resistance process of different types of tumors, both solid and hematopoietic, the following question was raised: Could LMWPTP present in the EVs derived from CRC tumor cells educate the platelets, even before the beginning of the metastatic process, and consequently to promote the release of pro-metastatic and prothrombogenic factors? It must be mentioned that despite the importance of the interaction of platelets with tumor cells for metastasis has already known, the molecular aspects of this process, as well as the mechanisms by which the tumor affects platelet function, still need to be clarified. Thus, the general objectives of this research project are to: a) find out if EVs derived from CRC cells containing high and low level of LMWPTP and bioengineered EVs containing LMWPTP-GFP are able to modulate platelet function, from the point of view of aggregation and metabolism (platelet signaling pathways); b) investigate whether EVs carrying LMWPTP lead to phenotypic and morphological alteration of cells from the tumor microenvironment (fibroblasts and endothelial cells); c) assess whether chemical inhibition of LMWPTP reduces the efficiency of production of the EVs by CRC cells; d) evaluate whether the chemical inhibition of LMWPTP affects platelet function/reactivity. The data obtained may demonstrate a new molecular aspect that supports the importance of LMWPTP as one of the key mediators of the hematogenous spread of CRC cells. In addition, it will be possible to show if this enzyme, besides acting intra-tumor cell promoting greater capacity of migration and resistance, is also able to "educate" platelets and cells of the microenvironment in favor of the tumor. Therefore, we expect to prove the hypothesis that tumor cells release LMWPTP to prepare the environment for the initiation and development of metastasis in CRC. Another relevant aspect will be the investigation if the LMWPTP could contribute to the thromboembolism process, once in cancer patients this condition is responsible for high rates of morbidity and mortality. (AU)

News published in Agência FAPESP Newsletter about the scholarship:
Articles published in other media outlets (0 total):
More itemsLess items

Scientific publications (5)
(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)
CLERICI, STEFANO PIATTO; DE SOUZA OLIVEIRA, PATRICIA FERNANDES; AKAGI, ERICA MIE; CORDEIRO, HELON GUIMARAES; AZEVEDO-MARTINS, JORDANA MARIA; DE SOUSA FARIA, ALESSANDRA VALERIA; FERREIRA-HALDER, CARMEN VERISSIMA. A comprehensive review on the role of protein tyrosine phosphatases in gastric cancer development and progression. Biological Chemistry, v. 402, n. 6, p. 663-674, . (17/08119-8, 17/16625-0, 15/20412-7, 18/03593-6)
FARIA, ALESSANDRA V. S.; FONSECA, EMANUELLA MARIA BARRETO; CORDEIRO, HELON GUIMARAES; CLERICI, STEFANO PIATTO; FERREIRA-HALDER, CARMEN VERISSIMA. Low molecular weight protein tyrosine phosphatase as signaling hub of cancer hallmarks. CELLULAR AND MOLECULAR LIFE SCIENCES, v. 78, n. 4, p. 1263-1273, . (17/08119-8, 15/11433-0, 18/03593-6)
ROCHA-BRITO, KARIN J. P.; CLERICI, STEFANO PIATTO; CORDEIRO, HELON GUIMARAES; SCOTA FERREIRA, AMANDA PETRINA; BARRETO FONSECA, EMANUELLA MARIA; GONCALVES, PAOLA R.; ABRANTES, JULIA LAURA F.; MILANI, RENATO; MASSARO, RENATO RAMOS; MARIA-ENGLER, SILVYA STUCHI; et al. uercetin increases mitochondrial proteins (VDAC and SDH) and downmodulates AXL and PIM-1 tyrosine kinase receptors in NRAS melanoma cell. Biological Chemistry, v. 403, n. 3, . (17/04926-6, 18/03593-6, 15/20412-7)
FARIA, ALESSANDRA V. S.; CLERICI, STEFANO P.; DE SOUZA OLIVEIRA, PATRICIA F.; QUEIROZ, KARLA C. S.; PEPPELENBOSCH, MAIKEL P.; FERREIRA-HALDER, CARMEN V.. LMWPTP modulates the antioxidant response and autophagy process in human chronic myeloid leukemia cells. Molecular and Cellular Biochemistry, v. 466, n. 1-2, p. 83-89, . (18/03593-6, 17/08119-8, 15/20412-7)
CLERICI, STEFANO PIATTO; PEPPELENBOSCH, MAIKEL; FUHLER, GWENNY; CONSONNI, SILVIO ROBERTO; FERREIRA-HALDER, CARMEN VERISSIMA. Colorectal Cancer Cell-Derived Small Extracellular Vesicles Educate Human Fibroblasts to Stimulate Migratory Capacity. FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY, v. 9, . (15/20412-7, 18/03593-6)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
CLERICI, Stefano Piatto. Extracellular vesicles in colorectal cancer cells: the unconventional secretion of low molecular weight protein tyrosine phosphatase and action in human fibroblasts. 2021. Doctoral Thesis - Universidade Estadual de Campinas (UNICAMP). Instituto de Biologia Campinas, SP.

Please report errors in scientific publications list by writing to: