Open Access
ARTICLE
STMN1 promotes the proliferation and inhibits the apoptosis of acute myeloid leukemiacells by activating the PI3K/Akt pathway
PENG YANG1,*, ZHIYING ZOU1, XULING GAO2
1 Department of Hematology, The Fourth People’s Hospital of Shenyang, Geriatrics Center, Shenyang, 110031, China
2 The Fourth People’s Hospital of Shenyang, Geriatrics Center, Shenyang, 110031, China
* Corresponding Author:PENG YANG. Email:
BIOCELL 2022, 46(1), 207-218. https://doi.org/10.32604/biocell.2021.014728
Received 24 October 2020; Accepted 22 December 2020; Issue published 29 September 2021
Abstract
Recent studies have shown that the microtubule disrupting protein Stathmin 1 (STMN1) is differentially
expressed in AML patients and healthy control. The aim of this study was to explore the effects and molecular
mechanism of STMN1 in AML. Here, the expression of
STMN1 in peripheral blood cells (PBMCs) and bone marrow
of AML patients and healthy volunteers was detected by RT-PCR and Western blot. STMN1 expression was regulated
by transfected with STMN1 overexpressed plasmid or shRNA in two human leukemia cell lines K562 and HL60. Cell
proliferation was examined by CCK8 and Edu staining. Annexin V and TUNEL assays were applied to test cell
apoptosis. Flow cytometry was used to test the cell cycle distribution. The activation of the PI3K signaling pathway
and the expression levels of cell cycle and cell apoptosis-related protein were determined by Western blot. In this
study, we found that STMN1 was overexpressed in PBMCs and bone marrow of AML patients. STMN1 expression
was closely related to FAB subtypes, risk stratification, disease-free survival, and overall survival of AML. Functional
assays showed that overexpression of STMN1 in HL60 and K562 cells enhanced cell proliferation, decreased cell
apoptosis, and caused G
1 phase arrest. In contrast, suppression of STMN1reduced cell proliferation and enhanced cell
apoptosis in both HL60 and K562 cells. Moreover, the PI3K/Akt pathway was activated by STMN1, while suppression
of STMN1 dysregulated the PI3K/Akt pathway and upregulating the levels of caspases3 and Bax expression. In
conclusion, STMN1 was confirmed to promote the proliferation and inhibit the apoptosis of HL60 and K562 cells by
modulating the PI3K/Akt pathway. STMN1 might be a novel molecular target for treating AML.
Keywords
Cite This Article
YANG, P., ZOU, Z., GAO, X. (2022). STMN1 promotes the proliferation and inhibits the apoptosis of acute myeloid leukemiacells by activating the PI3K/Akt pathway.
BIOCELL, 46(1), 207–218. https://doi.org/10.32604/biocell.2021.014728