PI3Kδ/γ inhibition promotes human CART cell epigenetic and metabolic reprogramming to enhance antitumor cytotoxicity

Current limitations in using chimeric antigen receptor T(CART) cells to treat patients with hematological cancers include limited expansion and persistence in vivo that contribute to cancer relapse. Patients with chronic lymphocytic leukemia (CLL) have terminally differentiated T cells with an exhau...

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Veröffentlicht in:Blood Jg. 139; H. 4; S. 523
Hauptverfasser: Funk, Christopher Ronald, Wang, Shuhua, Chen, Kevin Z, Waller, Alexandra, Sharma, Aditi, Edgar, Claudia L, Gupta, Vikas A, Chandrakasan, Shanmuganathan, Zoine, Jaquelyn T, Fedanov, Andrew, Raikar, Sunil S, Koff, Jean L, Flowers, Christopher R, Coma, Silvia, Pachter, Jonathan A, Ravindranathan, Sruthi, Spencer, H Trent, Shanmugam, Mala, Waller, Edmund K
Format: Journal Article
Sprache:Englisch
Veröffentlicht: United States 27.01.2022
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ISSN:1528-0020, 1528-0020
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Abstract Current limitations in using chimeric antigen receptor T(CART) cells to treat patients with hematological cancers include limited expansion and persistence in vivo that contribute to cancer relapse. Patients with chronic lymphocytic leukemia (CLL) have terminally differentiated T cells with an exhausted phenotype and experience low complete response rates after autologous CART therapy. Because PI3K inhibitor therapy is associated with the development of T-cell-mediated autoimmunity, we studied the effects of inhibiting the PI3Kδ and PI3Kγ isoforms during the manufacture of CART cells prepared from patients with CLL. Dual PI3Kδ/γ inhibition normalized CD4/CD8 ratios and maximized the number of CD8+ T-stem cell memory, naive, and central memory T-cells with dose-dependent decreases in expression of the TIM-3 exhaustion marker. CART cells manufactured with duvelisib (Duv-CART cells) showed significantly increased in vitro cytotoxicity against CD19+ CLL targets caused by increased frequencies of CD8+ CART cells. Duv-CART cells had increased expression of the mitochondrial fusion protein MFN2, with an associated increase in the relative content of mitochondria. Duv-CART cells exhibited increased SIRT1 and TCF1/7 expression, which correlated with epigenetic reprograming of Duv-CART cells toward stem-like properties. After transfer to NOG mice engrafted with a human CLL cell line, Duv-CART cells expressing either a CD28 or 41BB costimulatory domain demonstrated significantly increased in vivo expansion of CD8+ CART cells, faster elimination of CLL, and longer persistence. Duv-CART cells significantly enhanced survival of CLL-bearing mice compared with conventionally manufactured CART cells. In summary, exposure of CART to a PI3Kδ/γ inhibitor during manufacturing enriched the CART product for CD8+ CART cells with stem-like qualities and enhanced efficacy in eliminating CLL in vivo.
AbstractList Current limitations in using chimeric antigen receptor T(CART) cells to treat patients with hematological cancers include limited expansion and persistence in vivo that contribute to cancer relapse. Patients with chronic lymphocytic leukemia (CLL) have terminally differentiated T cells with an exhausted phenotype and experience low complete response rates after autologous CART therapy. Because PI3K inhibitor therapy is associated with the development of T-cell-mediated autoimmunity, we studied the effects of inhibiting the PI3Kδ and PI3Kγ isoforms during the manufacture of CART cells prepared from patients with CLL. Dual PI3Kδ/γ inhibition normalized CD4/CD8 ratios and maximized the number of CD8+ T-stem cell memory, naive, and central memory T-cells with dose-dependent decreases in expression of the TIM-3 exhaustion marker. CART cells manufactured with duvelisib (Duv-CART cells) showed significantly increased in vitro cytotoxicity against CD19+ CLL targets caused by increased frequencies of CD8+ CART cells. Duv-CART cells had increased expression of the mitochondrial fusion protein MFN2, with an associated increase in the relative content of mitochondria. Duv-CART cells exhibited increased SIRT1 and TCF1/7 expression, which correlated with epigenetic reprograming of Duv-CART cells toward stem-like properties. After transfer to NOG mice engrafted with a human CLL cell line, Duv-CART cells expressing either a CD28 or 41BB costimulatory domain demonstrated significantly increased in vivo expansion of CD8+ CART cells, faster elimination of CLL, and longer persistence. Duv-CART cells significantly enhanced survival of CLL-bearing mice compared with conventionally manufactured CART cells. In summary, exposure of CART to a PI3Kδ/γ inhibitor during manufacturing enriched the CART product for CD8+ CART cells with stem-like qualities and enhanced efficacy in eliminating CLL in vivo.Current limitations in using chimeric antigen receptor T(CART) cells to treat patients with hematological cancers include limited expansion and persistence in vivo that contribute to cancer relapse. Patients with chronic lymphocytic leukemia (CLL) have terminally differentiated T cells with an exhausted phenotype and experience low complete response rates after autologous CART therapy. Because PI3K inhibitor therapy is associated with the development of T-cell-mediated autoimmunity, we studied the effects of inhibiting the PI3Kδ and PI3Kγ isoforms during the manufacture of CART cells prepared from patients with CLL. Dual PI3Kδ/γ inhibition normalized CD4/CD8 ratios and maximized the number of CD8+ T-stem cell memory, naive, and central memory T-cells with dose-dependent decreases in expression of the TIM-3 exhaustion marker. CART cells manufactured with duvelisib (Duv-CART cells) showed significantly increased in vitro cytotoxicity against CD19+ CLL targets caused by increased frequencies of CD8+ CART cells. Duv-CART cells had increased expression of the mitochondrial fusion protein MFN2, with an associated increase in the relative content of mitochondria. Duv-CART cells exhibited increased SIRT1 and TCF1/7 expression, which correlated with epigenetic reprograming of Duv-CART cells toward stem-like properties. After transfer to NOG mice engrafted with a human CLL cell line, Duv-CART cells expressing either a CD28 or 41BB costimulatory domain demonstrated significantly increased in vivo expansion of CD8+ CART cells, faster elimination of CLL, and longer persistence. Duv-CART cells significantly enhanced survival of CLL-bearing mice compared with conventionally manufactured CART cells. In summary, exposure of CART to a PI3Kδ/γ inhibitor during manufacturing enriched the CART product for CD8+ CART cells with stem-like qualities and enhanced efficacy in eliminating CLL in vivo.
Current limitations in using chimeric antigen receptor T(CART) cells to treat patients with hematological cancers include limited expansion and persistence in vivo that contribute to cancer relapse. Patients with chronic lymphocytic leukemia (CLL) have terminally differentiated T cells with an exhausted phenotype and experience low complete response rates after autologous CART therapy. Because PI3K inhibitor therapy is associated with the development of T-cell-mediated autoimmunity, we studied the effects of inhibiting the PI3Kδ and PI3Kγ isoforms during the manufacture of CART cells prepared from patients with CLL. Dual PI3Kδ/γ inhibition normalized CD4/CD8 ratios and maximized the number of CD8+ T-stem cell memory, naive, and central memory T-cells with dose-dependent decreases in expression of the TIM-3 exhaustion marker. CART cells manufactured with duvelisib (Duv-CART cells) showed significantly increased in vitro cytotoxicity against CD19+ CLL targets caused by increased frequencies of CD8+ CART cells. Duv-CART cells had increased expression of the mitochondrial fusion protein MFN2, with an associated increase in the relative content of mitochondria. Duv-CART cells exhibited increased SIRT1 and TCF1/7 expression, which correlated with epigenetic reprograming of Duv-CART cells toward stem-like properties. After transfer to NOG mice engrafted with a human CLL cell line, Duv-CART cells expressing either a CD28 or 41BB costimulatory domain demonstrated significantly increased in vivo expansion of CD8+ CART cells, faster elimination of CLL, and longer persistence. Duv-CART cells significantly enhanced survival of CLL-bearing mice compared with conventionally manufactured CART cells. In summary, exposure of CART to a PI3Kδ/γ inhibitor during manufacturing enriched the CART product for CD8+ CART cells with stem-like qualities and enhanced efficacy in eliminating CLL in vivo.
Author Wang, Shuhua
Edgar, Claudia L
Shanmugam, Mala
Funk, Christopher Ronald
Pachter, Jonathan A
Spencer, H Trent
Sharma, Aditi
Chandrakasan, Shanmuganathan
Waller, Alexandra
Flowers, Christopher R
Fedanov, Andrew
Raikar, Sunil S
Koff, Jean L
Zoine, Jaquelyn T
Gupta, Vikas A
Ravindranathan, Sruthi
Chen, Kevin Z
Coma, Silvia
Waller, Edmund K
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  givenname: Jaquelyn T
  orcidid: 0000-0001-7914-4610
  surname: Zoine
  fullname: Zoine, Jaquelyn T
  organization: Cell and Gene Therapy Program, Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Children's Healthcare of Atlanta and Emory University School of Medicine, Atlanta, GA
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  givenname: Andrew
  surname: Fedanov
  fullname: Fedanov, Andrew
  organization: Cell and Gene Therapy Program, Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Children's Healthcare of Atlanta and Emory University School of Medicine, Atlanta, GA
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  givenname: Sunil S
  orcidid: 0000-0003-2903-9542
  surname: Raikar
  fullname: Raikar, Sunil S
  organization: Cell and Gene Therapy Program, Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Children's Healthcare of Atlanta and Emory University School of Medicine, Atlanta, GA
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  givenname: Jean L
  orcidid: 0000-0003-4414-0489
  surname: Koff
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  organization: Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, GA
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  givenname: Christopher R
  surname: Flowers
  fullname: Flowers, Christopher R
  organization: Department of Lymphoma/Myeloma, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, TX; and
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  givenname: Silvia
  surname: Coma
  fullname: Coma, Silvia
  organization: Verastem Oncology Inc, Needham, MA
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  givenname: Jonathan A
  orcidid: 0000-0002-0263-474X
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  orcidid: 0000-0003-0451-7931
  surname: Ravindranathan
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  organization: Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, GA
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  givenname: H Trent
  surname: Spencer
  fullname: Spencer, H Trent
  organization: Cell and Gene Therapy Program, Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Children's Healthcare of Atlanta and Emory University School of Medicine, Atlanta, GA
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  givenname: Mala
  surname: Shanmugam
  fullname: Shanmugam, Mala
  organization: Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, GA
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  givenname: Edmund K
  orcidid: 0000-0003-0816-6729
  surname: Waller
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  organization: Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, GA
BackLink https://www.ncbi.nlm.nih.gov/pubmed/35084470$$D View this record in MEDLINE/PubMed
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Copyright 2022 by The American Society of Hematology.
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References 36136355 - Blood. 2022 Sep 22;140(12):1449-1451. doi: 10.1182/blood.2022017516
35084472 - Blood. 2022 Jan 27;139(4):473-474. doi: 10.1182/blood.2021013895
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Snippet Current limitations in using chimeric antigen receptor T(CART) cells to treat patients with hematological cancers include limited expansion and persistence...
Current limitations in using chimeric antigen receptor T(CART) cells to treat patients with hematological cancers include limited expansion and persistence in...
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SubjectTerms Animals
Cells, Cultured
Cellular Reprogramming Techniques - methods
Class I Phosphatidylinositol 3-Kinases - antagonists & inhibitors
Class I Phosphatidylinositol 3-Kinases - metabolism
Class Ib Phosphatidylinositol 3-Kinase - metabolism
Epigenesis, Genetic
Humans
Immunotherapy, Adoptive - methods
Isoquinolines - therapeutic use
Leukemia, Lymphocytic, Chronic, B-Cell - genetics
Leukemia, Lymphocytic, Chronic, B-Cell - therapy
Mice
Phosphoinositide-3 Kinase Inhibitors - therapeutic use
Purines - therapeutic use
Title PI3Kδ/γ inhibition promotes human CART cell epigenetic and metabolic reprogramming to enhance antitumor cytotoxicity
URI https://www.ncbi.nlm.nih.gov/pubmed/35084470
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