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Pezzotta A, Gentile I, Genovese D, Totaro MG, Battaglia C, Leung AYH, Fumagalli M, Parma M, Cazzaniga G, Fazio G, Alcalay M, Marozzi A, Pistocchi A. HDAC6 inhibition decreases leukemic stem cell expansion driven by Hedgehog hyperactivation by restoring primary ciliogenesis. Pharmacol Res 2022; 183:106378. [PMID: 35918044 DOI: 10.1016/j.phrs.2022.106378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 06/27/2022] [Accepted: 07/29/2022] [Indexed: 10/16/2022]
Abstract
Aberrant activation of the Hh pathway promotes cell proliferation and multi-drug resistance (MDR) in several cancers, including Acute Myeloid Leukemia (AML). Notably, only one Hh inhibitor, glasdegib, has been approved for AML treatment, and most patients eventually relapse, highlighing the urgent need ti discover new therapeutic targets. Hh signal is transduced through the membrane of the primary cilium, a structure expressed by non-proliferating mammalian cells, whose stabilization depends on the activity of HDAC6. Here we describe a positive correlation between Hh, HDAC6, and MDR genes in a cohort of adult AML patients, human leukemic cell lines, and a zebrafish model of Hh overexpression. The hyper-activation of Hh or HDAC6 in zebrafish drove the increased proliferation of hematopoietic stem and progenitor cells (HSPCs). Interestingly, this phenotype was rescued by inhibition of HDAC6 but not of Hh. Also, in human leukemic cell lines, a reduction in vitality was obtained through HDAC6, but not Hh inhibition. Our data showed the presence of a cross-talk between Hh and HDAC6 mediated by stabilization of the primary cilium, which we detect for the first time in zebrafish HSPCs. Inhibition of HDAC6 activity alone or in combination therapy with the chemotherapeutic agent cytarabine, efficiently rescued the hematopoietic phenotype. Our results open the possibility to introduce HDAC6 as therapeutic target to reduce proliferation of leukemic blasts in AML patients.
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Affiliation(s)
- Alex Pezzotta
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, Milano, Italy
| | - Ilaria Gentile
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, Milano, Italy
| | - Donatella Genovese
- Dipartimento di Oncologia Sperimentale, Istituto Europeo di Oncologia IRCCS, Milano, Italy
| | | | - Cristina Battaglia
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, Milano, Italy
| | | | - Monica Fumagalli
- Hospital San Gerardo, Clinica Ematologica e Centro Trapianti di Midollo Osseo, Monza, Italy
| | - Matteo Parma
- Hospital San Gerardo, Clinica Ematologica e Centro Trapianti di Midollo Osseo, Monza, Italy
| | - Gianni Cazzaniga
- Centro Ricerca Tettamanti, Clinica Pediatrica Università di Milano-Bicocca, Centro Maria Letizia Verga, Monza, Italy
| | - Grazia Fazio
- Centro Ricerca Tettamanti, Clinica Pediatrica Università di Milano-Bicocca, Centro Maria Letizia Verga, Monza, Italy
| | - Myriam Alcalay
- Dipartimento di Oncologia Sperimentale, Istituto Europeo di Oncologia IRCCS, Milano, Italy; Dipartimento di Oncologia ed Emato-Oncologia, Università degli Studi di Milano, Milano, Italy
| | - Anna Marozzi
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, Milano, Italy
| | - Anna Pistocchi
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, Milano, Italy.
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