A Synthetic Fragment of Leptin Increase Hematopoietic Stem Cell Population and Improve Its Engraftment Ability

Author(s)

Dias, Carolina C. ^[1] ; Nogueira-Pedro, Amanda ^[2] ; Tokuyama, Paula Yumi ^[2] ; Martins, Marta N. C. ^[2] ; Comodo Segreto, Helena Regina ^[3] ; Buri, Marcus V. ^[1] ; Miranda, Antonio ^[2] ; Paredes-Gamero, Edgar J. ^{[4, 1]}

Affiliation

^[1] Univ Fed Sao Paulo, Dept Bioquim, BR-04044020 Sao Paulo, SP - Brazil

^[2] Univ Fed Sao Paulo, Dept Biofis, BR-04044020 Sao Paulo, SP - Brazil

^[3] Univ Fed Sao Paulo, Dept Oncol Clin & Expt, BR-715 Sao Paulo - Brazil

^[4] Univ Mogi das Cruzes, Ctr Interdisciplinar Invest Bioquim, Mogi Das Cruzes, SP - Brazil

• Document type: Journal article
• Source: Journal of Cellular Biochemistry; v. 116, n. 7, p. 1334-1340, JUL 2015.
• Web of Science Citations: 2

Abstract

Several studies have shown the important actions of cytokine leptin that regulates food intake and energy expenditure. Additionally, the ability to modulate hematopoiesis has also been demonstrated. Previous reports have shown that some synthetic sequences of leptin molecules can activate leptin receptor. Herein, decapeptides encompassing amino acids from positions 98 to 122 of the leptin molecule were constructed to evaluate their effects on hematopoiesis. Among them, the synthetic peptide Lep(110-119)-NH2 (LEP F) was the only peptide that possessed the ability to increase the percentage of hematopoietic stem cells (HSC). Moreover, LEP F also produced an increase of granulocyte/macrophage colony-forming units and activated leptin receptor. Furthermore, LEP F also improves the grafting of HSC in bone marrow, but did not accelerate the recovery of bone marrow after ablation with 5-fluorouracil. These results show that LEP F is a positive modulator of the in vivo expansion of HSC and could be useful in bone marrow transplantation. J. Cell. Biochem. 116: 1334-1340, 2015. (c) 2015 Wiley Periodicals, Inc. (AU)

• FAPESP's process: 13/09068-7 - Action of hematopoietic modulators in leukemic stem cells
• Grantee: Edgar Julian Paredes-Gamero
• Support Opportunities: Regular Research Grants