Phf6 loss enhances HSC self-renewal driving tumor initiation and leukemia stem cell activity in T-All

Agnieszka A. Wendorff; S. Aidan Quinn; Marissa Rashkovan; Chioma J. Madubata; Alberto Ambesi-Impiombato; Mark R. Litzow; Martin S. Tallman; Elisabeth Paietta; Maddalena Paganin; Giuseppe Basso; Julie M. Gastier-Foster; Mignon L. Loh; Raul Rabadan; Pieter Van Vlierberghe; Adolfo A. Ferrando

doi:10.1158/2159-8290.CD-18-1005

Phf6 loss enhances HSC self-renewal driving tumor initiation and leukemia stem cell activity in T-All

Agnieszka A. Wendorff, S. Aidan Quinn, Marissa Rashkovan, Chioma J. Madubata, Alberto Ambesi-Impiombato, Mark R. Litzow, Martin S. Tallman, Elisabeth Paietta, Maddalena Paganin, Giuseppe Basso, Julie M. Gastier-Foster, Mignon L. Loh, Raul Rabadan, Pieter Van Vlierberghe, Adolfo A. Ferrando

Hematology

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

The plant homeodomain 6 gene (PHF6) is frequently mutated in human T-cell acute lymphoblastic leukemia (T-ALL); however, its specific functional role in leukemia development remains to be established. Here, we show that loss of PHF6 is an early mutational event in leukemia transformation. Mechanistically, genetic inactivation of Phf6 in the hematopoietic system enhances hematopoietic stem cell (HSC) long-term self-renewal and hematopoietic recovery after chemotherapy by rendering Phf6 knockout HSCs more quiescent and less prone to stress-induced activation. Consistent with a leukemia-initiating tumor suppressor role, inactivation of Phf6 in hematopoietic progenitors lowers the threshold for the development of NOTCH1-induced T-ALL. Moreover, loss of Phf6 in leukemia lymphoblasts activates a leukemia stem cell transcriptional program and drives enhanced T-ALL leukemia-initiating cell activity. These results implicate Phf6 in the control of HSC homeostasis and long-term self-renewal and support a role for PHF6 loss as a driver of leukemia-initiating cell activity in T-ALL.

Original language	English (US)
Pages (from-to)	436-451
Number of pages	16
Journal	Cancer discovery
Volume	9
Issue number	3
DOIs	https://doi.org/10.1158/2159-8290.CD-18-1005
State	Published - Mar 1 2019

ASJC Scopus subject areas

Oncology

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10.1158/2159-8290.CD-18-1005

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Wendorff, A. A., Quinn, S. A., Rashkovan, M., Madubata, C. J., Ambesi-Impiombato, A., Litzow, M. R., Tallman, M. S., Paietta, E., Paganin, M., Basso, G., Gastier-Foster, J. M., Loh, M. L., Rabadan, R., Vlierberghe, P. V., & Ferrando, A. A. (2019). Phf6 loss enhances HSC self-renewal driving tumor initiation and leukemia stem cell activity in T-All. Cancer discovery, 9(3), 436-451. https://doi.org/10.1158/2159-8290.CD-18-1005

Wendorff, AA, Quinn, SA, Rashkovan, M, Madubata, CJ, Ambesi-Impiombato, A, Litzow, MR, Tallman, MS, Paietta, E, Paganin, M, Basso, G, Gastier-Foster, JM, Loh, ML, Rabadan, R, Vlierberghe, PV & Ferrando, AA 2019, 'Phf6 loss enhances HSC self-renewal driving tumor initiation and leukemia stem cell activity in T-All', Cancer discovery, vol. 9, no. 3, pp. 436-451. https://doi.org/10.1158/2159-8290.CD-18-1005

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title = "Phf6 loss enhances HSC self-renewal driving tumor initiation and leukemia stem cell activity in T-All",

abstract = "The plant homeodomain 6 gene (PHF6) is frequently mutated in human T-cell acute lymphoblastic leukemia (T-ALL); however, its specific functional role in leukemia development remains to be established. Here, we show that loss of PHF6 is an early mutational event in leukemia transformation. Mechanistically, genetic inactivation of Phf6 in the hematopoietic system enhances hematopoietic stem cell (HSC) long-term self-renewal and hematopoietic recovery after chemotherapy by rendering Phf6 knockout HSCs more quiescent and less prone to stress-induced activation. Consistent with a leukemia-initiating tumor suppressor role, inactivation of Phf6 in hematopoietic progenitors lowers the threshold for the development of NOTCH1-induced T-ALL. Moreover, loss of Phf6 in leukemia lymphoblasts activates a leukemia stem cell transcriptional program and drives enhanced T-ALL leukemia-initiating cell activity. These results implicate Phf6 in the control of HSC homeostasis and long-term self-renewal and support a role for PHF6 loss as a driver of leukemia-initiating cell activity in T-ALL.",

author = "Wendorff, {Agnieszka A.} and Quinn, {S. Aidan} and Marissa Rashkovan and Madubata, {Chioma J.} and Alberto Ambesi-Impiombato and Litzow, {Mark R.} and Tallman, {Martin S.} and Elisabeth Paietta and Maddalena Paganin and Giuseppe Basso and Gastier-Foster, {Julie M.} and Loh, {Mignon L.} and Raul Rabadan and Vlierberghe, {Pieter Van} and Ferrando, {Adolfo A.}",

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AU - Wendorff, Agnieszka A.

AU - Quinn, S. Aidan

AU - Rashkovan, Marissa

AU - Madubata, Chioma J.

AU - Ambesi-Impiombato, Alberto

AU - Litzow, Mark R.

AU - Tallman, Martin S.

AU - Paietta, Elisabeth

AU - Paganin, Maddalena

AU - Basso, Giuseppe

AU - Gastier-Foster, Julie M.

AU - Loh, Mignon L.

AU - Rabadan, Raul

AU - Vlierberghe, Pieter Van

AU - Ferrando, Adolfo A.

PY - 2019/3/1

Y1 - 2019/3/1

N2 - The plant homeodomain 6 gene (PHF6) is frequently mutated in human T-cell acute lymphoblastic leukemia (T-ALL); however, its specific functional role in leukemia development remains to be established. Here, we show that loss of PHF6 is an early mutational event in leukemia transformation. Mechanistically, genetic inactivation of Phf6 in the hematopoietic system enhances hematopoietic stem cell (HSC) long-term self-renewal and hematopoietic recovery after chemotherapy by rendering Phf6 knockout HSCs more quiescent and less prone to stress-induced activation. Consistent with a leukemia-initiating tumor suppressor role, inactivation of Phf6 in hematopoietic progenitors lowers the threshold for the development of NOTCH1-induced T-ALL. Moreover, loss of Phf6 in leukemia lymphoblasts activates a leukemia stem cell transcriptional program and drives enhanced T-ALL leukemia-initiating cell activity. These results implicate Phf6 in the control of HSC homeostasis and long-term self-renewal and support a role for PHF6 loss as a driver of leukemia-initiating cell activity in T-ALL.

AB - The plant homeodomain 6 gene (PHF6) is frequently mutated in human T-cell acute lymphoblastic leukemia (T-ALL); however, its specific functional role in leukemia development remains to be established. Here, we show that loss of PHF6 is an early mutational event in leukemia transformation. Mechanistically, genetic inactivation of Phf6 in the hematopoietic system enhances hematopoietic stem cell (HSC) long-term self-renewal and hematopoietic recovery after chemotherapy by rendering Phf6 knockout HSCs more quiescent and less prone to stress-induced activation. Consistent with a leukemia-initiating tumor suppressor role, inactivation of Phf6 in hematopoietic progenitors lowers the threshold for the development of NOTCH1-induced T-ALL. Moreover, loss of Phf6 in leukemia lymphoblasts activates a leukemia stem cell transcriptional program and drives enhanced T-ALL leukemia-initiating cell activity. These results implicate Phf6 in the control of HSC homeostasis and long-term self-renewal and support a role for PHF6 loss as a driver of leukemia-initiating cell activity in T-ALL.

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Phf6 loss enhances HSC self-renewal driving tumor initiation and leukemia stem cell activity in T-All

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