A synthetic fragment of leptin increase hematopoietic stem cell population and improve its engraftment ability.

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.

journal_name

J Cell Biochem

authors

Dias CC,Nogueira-Pedro A,Tokuyama PY,Martins MN,Segreto HR,Buri MV,Miranda A,Paredes-Gamero EJ

doi

10.1002/jcb.25090

subject

Has Abstract

pub_date

2015-07-01 00:00:00

pages

1334-40

issue

7

eissn

0730-2312

issn

1097-4644

journal_volume

116

pub_type

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