Transglutaminase Type 2 is Involved in the Hematopoietic Stem Cells Homeostasis

S. Oliverio, J. S.O. Beltran, L. Occhigrossi, V. Bordoni, C. Agrati, M. D’Eletto, F. Rossin, P. Borelli, G. P. Amarante-Mendes, O. Demidov, N. A. Barlev, M. Piacentini

Research output: Contribution to journalArticlepeer-review

Abstract

Abstract: Type 2 transglutaminase (TG2) is a multifunctional protein involved in various biological processes playing a key regulatory role in cell homeostasis such as cell death and autophagy. New evidence is emerging that support an important role of autophagy in regulating normal hematopoiesis. Prompted by these findings, in this study we investigated in vivo involvement of TG2 in mouse hematopoiesis under normal or nutrient deprivation conditions. We found that the number and rate of differentiation of bone marrow hematopoietic stem cell was decreased in the TG2 knockout mice. We present evidence showing that these effects on hematopoietic system are very likely due to the TG2-dependent impairment of autophagy. In fact, stimulation of autophagy by starvation is able to rescue the block of the differentiation of stem cells progenitors in the TG2 KO mice. It was also shown that the RhoA/ERK½ pathway, known to be essential for regulation of the bone marrow progenitor cells homeostasis, was significantly impaired in the absence of TG2. Hence, this study expanded our knowledge about TG2 discovering a role of this enzyme in regulation of hematopoiesis.

Original languageEnglish
Pages (from-to)1159-1168
Number of pages10
JournalBiochemistry (Moscow)
Volume85
Issue number10
DOIs
Publication statusPublished - Oct 1 2020

Keywords

  • autophagy
  • hematopoietic stem cells
  • TG2

ASJC Scopus subject areas

  • Biochemistry

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