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Chu GJ, Bailey CG, Nagarajah R, Liang O, Metierre C, Sagnella SM, Castelletti L, Yeo D, Adelstein S, Rasko JEJ. Mesothelin antigen density influences anti-mesothelin chimeric antigen receptor T cell cytotoxicity. Cytotherapy 2024; 26:325-333. [PMID: 38349311 DOI: 10.1016/j.jcyt.2024.01.011] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 01/05/2024] [Accepted: 01/27/2024] [Indexed: 04/07/2024]
Abstract
BACKGROUND AIMS Several anti-mesothelin (MSLN) chimeric antigen receptor (CAR) T cells are in phase 1/2 clinical trials to treat solid-organ malignancies. The effect of MSLN antigen density on MSLN CAR cytotoxicity against tumor cells has not been examined previously, nor are there data regarding the effect of agents that increase MSLN antigen density on anti-MSLN CAR T cell efficacy. METHODS MSLN antigen density was measured on a panel of pancreatic cancer and mesothelioma cell lines by flow cytometry. In parallel, the cytotoxicity and specificity of two anti-MSLN CAR T cells (m912 and SS1) were compared against these cell lines using a real-time impedance-based assay. The effect of two MSLN 'sheddase' inhibitors (lanabecestat and TMI-1) that increase MSLN surface expression was also tested in combination with CAR T cells. RESULTS SS1 CAR T cells were more cytotoxic compared with m912 CAR T cells against cell lines that expressed fewer than ∼170 000 MSLN molecules/cell. A comparison of the m912 and amatuximab (humanized SS1) antibodies identified that amatuximab could detect and bind to lower levels of MSLN on pancreatic cancer and mesothelioma cell lines, suggesting that superior antibody/scFv affinity was the reason for the SS1 CAR's superior cytotoxicity. The cytotoxicity of m912 CAR T cells was improved in the presence of sheddase inhibitors, which increased MSLN antigen density. CONCLUSIONS These data highlight the value of assessing CAR constructs against a panel of cells expressing varying degrees of target tumor antigen as occurs in human tumors. Furthermore, the problem of low antigen density may be overcome by concomitant administration of drugs that inhibit enzymatic shedding of MSLN.
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Affiliation(s)
- Gerard J Chu
- Gene and Stem Cell Therapy Program Centenary Institute, Camperdown, NSW, Australia; Department of Clinical Immunology and Allergy, Royal Prince Alfred Hospital, Camperdown, NSW, Australia; Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia.
| | - Charles G Bailey
- Gene and Stem Cell Therapy Program Centenary Institute, Camperdown, NSW, Australia; Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia; Cancer and Gene Regulation Laboratory Centenary Institute, Camperdown, NSW, Australia.
| | - Rajini Nagarajah
- Gene and Stem Cell Therapy Program Centenary Institute, Camperdown, NSW, Australia.
| | - Oliver Liang
- Gene and Stem Cell Therapy Program Centenary Institute, Camperdown, NSW, Australia; Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia; Cell & Molecular Therapies, Royal Prince Alfred Hospital, Camperdown, NSW, Australia; Li Ka Shing Cell & Gene Therapy Program, University of Sydney, Camperdown, NSW, Australia.
| | - Cynthia Metierre
- Gene and Stem Cell Therapy Program Centenary Institute, Camperdown, NSW, Australia.
| | - Sharon M Sagnella
- Cell & Molecular Therapies, Royal Prince Alfred Hospital, Camperdown, NSW, Australia.
| | - Laura Castelletti
- Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia; Cell & Molecular Therapies, Royal Prince Alfred Hospital, Camperdown, NSW, Australia; Li Ka Shing Cell & Gene Therapy Program, University of Sydney, Camperdown, NSW, Australia.
| | - Dannel Yeo
- Gene and Stem Cell Therapy Program Centenary Institute, Camperdown, NSW, Australia; Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia; Cell & Molecular Therapies, Royal Prince Alfred Hospital, Camperdown, NSW, Australia; Li Ka Shing Cell & Gene Therapy Program, University of Sydney, Camperdown, NSW, Australia.
| | - Stephen Adelstein
- Department of Clinical Immunology and Allergy, Royal Prince Alfred Hospital, Camperdown, NSW, Australia; Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia.
| | - John E J Rasko
- Gene and Stem Cell Therapy Program Centenary Institute, Camperdown, NSW, Australia; Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia; Cell & Molecular Therapies, Royal Prince Alfred Hospital, Camperdown, NSW, Australia; Li Ka Shing Cell & Gene Therapy Program, University of Sydney, Camperdown, NSW, Australia.
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Liang O, Seixas A, Killgore W, Gehrels J, Alfonso-Miller P, Grandner M. 0888 Sleep Duration And Diabetes In The Us For 2007–2015: Moderation By Age, Sex, Race/ethnicity, And Body Mass Index. Sleep 2018. [DOI: 10.1093/sleep/zsy061.887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- O Liang
- University of Arizona, Tucson, AZ
| | - A Seixas
- New York University, New York, NY
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Lamb M, Storrs R, Li S, Liang O, Laugenour K, Dorian R, Chapman D, Ichii H, Imagawa D, Foster C, King S, Lakey JRT. Function and viability of human islets encapsulated in alginate sheets: in vitro and in vivo culture. Transplant Proc 2014; 43:3265-6. [PMID: 22099772 DOI: 10.1016/j.transproceed.2011.10.028] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Islet encapsulation offers an immune system barrier for islet transplantation, and encapsulation within an alginate sheetlike structure offers the ability to be retrievable after transplanted. This study aims to show that human islets encapsulated into islet sheets remain functional and viable after 8 weeks in culture or when transplanted into the subcutaneous space of rats. Human islets were isolated from cadaveric organs. Dissociation and purification were done using enzymatic digestion and a continuous Ficoll-UWD gradient. Purified human islets were encapsulated in alginate sheets. Human Islet sheets were either kept in culture, at 37°C and 5% CO(2), or transplanted subcutaneously into Lewis rats. After 1, 2, 4, and 8 weeks, the human islet sheets were retrieved from the rats and assessed. The viability of the sheets was measured using fluorescein diacetate (FDA)/propidium iodide (PI), and function was measured through glucose-stimulated insulin release, in which the sheets were incubated for an hour in low-glucose concentration (2.8 mmol/L) and then high (28 mmol/L), then high (28 mmol/L) plus 3-isobutyl-1-methylxanthine (50 μm). Human islet sheets remained both viable, above 70%, and functional, with a stimulation index (insulin secretion in high glucose divided by insulin secretion in low glucose) above 1.5, over 8 weeks of culture or subcutaneous transplantation. Islet transplantation continues to make advances in the treatment of type 1 diabetes. These preliminary results suggest that encapsulated islets sheets can survive and maintain islet viability and function in vivo, within the subcutaneous region.
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Affiliation(s)
- M Lamb
- Department of Surgery, University of California at Irvine, Orange, California 92697, USA
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Zygmunt M, Liang O, Tinneberg HR, Preissner K, Ball N. Isolierung, Charakterisierung und Kultivierung von fetalen Stammzellen aus der Nabelschnur – Rolle der fetalen Faktoren in ihre Differenzierung. Geburtshilfe Frauenheilkd 2003. [DOI: 10.1055/s-2003-815148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Schmidt-Wolf IG, Liang O, Dejbakhsh-Jones S, Wang H, Cheng L, Holm B, Bell R, Strober S. Homogeneous antigen receptor beta-chain genes in cloned CD4- CD8- alpha beta T suppressor cells. The Journal of Immunology 1993. [DOI: 10.4049/jimmunol.151.10.5348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
The rearrangements of beta-chain genes of the T cell Ag receptor were examined in 12 CD4- CD8- alpha beta + T cell lines derived from the spleen or thymus of neonatal or adult BALB/c mice. Eleven of the lines were cloned and established from six independent cloning procedures from different mice. Five cloned lines used V beta 9, four cloned lines used V beta 15, and two cloned lines used V beta 7. Nucleotide sequencing of the beta-chain genes showed that clones that used a given V beta were identically rearranged even when they were derived from independent cloning procedures. In the case of V beta 7 and V beta 15 all nucleotides in the V-D-J joining region were in the germ line configuration without N region additions. Rearrangements of the V beta 7, V beta 9, and V beta 15 genes were functional. Each V beta 15 clone also had a homogeneous rearrangement of the V beta 13 gene, which was nonfunctional. The predicted amino acid sequence of the joining regions of the V beta 7, V beta 9, and V beta 15 rearrangements showed homology in four of seven amino acids in the peptide contact region.
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Affiliation(s)
- I G Schmidt-Wolf
- Department of Medicine, Stanford University School of Medicine, CA 94305
| | - O Liang
- Department of Medicine, Stanford University School of Medicine, CA 94305
| | - S Dejbakhsh-Jones
- Department of Medicine, Stanford University School of Medicine, CA 94305
| | - H Wang
- Department of Medicine, Stanford University School of Medicine, CA 94305
| | - L Cheng
- Department of Medicine, Stanford University School of Medicine, CA 94305
| | - B Holm
- Department of Medicine, Stanford University School of Medicine, CA 94305
| | - R Bell
- Department of Medicine, Stanford University School of Medicine, CA 94305
| | - S Strober
- Department of Medicine, Stanford University School of Medicine, CA 94305
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Schmidt-Wolf IG, Liang O, Dejbakhsh-Jones S, Wang H, Cheng L, Holm B, Bell R, Strober S. Homogeneous antigen receptor beta-chain genes in cloned CD4- CD8- alpha beta T suppressor cells. J Immunol 1993; 151:5348-53. [PMID: 8228230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The rearrangements of beta-chain genes of the T cell Ag receptor were examined in 12 CD4- CD8- alpha beta + T cell lines derived from the spleen or thymus of neonatal or adult BALB/c mice. Eleven of the lines were cloned and established from six independent cloning procedures from different mice. Five cloned lines used V beta 9, four cloned lines used V beta 15, and two cloned lines used V beta 7. Nucleotide sequencing of the beta-chain genes showed that clones that used a given V beta were identically rearranged even when they were derived from independent cloning procedures. In the case of V beta 7 and V beta 15 all nucleotides in the V-D-J joining region were in the germ line configuration without N region additions. Rearrangements of the V beta 7, V beta 9, and V beta 15 genes were functional. Each V beta 15 clone also had a homogeneous rearrangement of the V beta 13 gene, which was nonfunctional. The predicted amino acid sequence of the joining regions of the V beta 7, V beta 9, and V beta 15 rearrangements showed homology in four of seven amino acids in the peptide contact region.
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MESH Headings
- Animals
- Base Sequence
- Blotting, Southern
- CD4 Antigens/analysis
- CD8 Antigens/analysis
- Clone Cells
- Gene Rearrangement, beta-Chain T-Cell Antigen Receptor
- Mice
- Mice, Inbred BALB C
- Molecular Sequence Data
- Receptors, Antigen, T-Cell, alpha-beta/analysis
- Receptors, Antigen, T-Cell, alpha-beta/chemistry
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- T-Lymphocytes, Regulatory/immunology
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Affiliation(s)
- I G Schmidt-Wolf
- Department of Medicine, Stanford University School of Medicine, CA 94305
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Palathumpat V, Dejbakhsh-Jones S, Holm B, Wang H, Liang O, Strober S. Studies of CD4- CD8- alpha beta bone marrow T cells with suppressor activity. The Journal of Immunology 1992. [DOI: 10.4049/jimmunol.148.2.373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
The predominant T cell subset in the bone marrow of specific pathogen-free C57BL/Ka and BALB/c mice expressed the alpha beta+ TCR CD4- CD8- surface phenotype. Purified C57BL/Ka alpha beta+ TCR CD4- CD8- marrow cells obtained by cell sorting suppressed the MLR of C57BL/Ka responder and BALB/c stimulator spleen cells. Although the percentage of typical T cells in the spleen was markedly reduced in adult nude mice or normal neonatal mice as compared to the normal adult, the percentage of alpha beta+ TCR CD4- CD8- cells in the spleen and marrow was not. The percentage of "self-reactive" V beta 5+ T cells in the BALB/c spleen was markedly reduced as compared to that in the C57BL/Ka spleen. However, the percentages in the bone marrow were similar. The results indicate that the predominant subset of marrow T cells in these pathogen-free mice differ with regard to surface marker phenotype, function, dependence on the adult thymus, and deletion of certain self-reactive V beta receptors as compared to typical spleen T cells. The marrow T cells appear to develop directly from marrow precursors without rearranged beta chain genes during a 48 hour in vitro culture.
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Affiliation(s)
- V Palathumpat
- Department of Medicine, Stanford University School of Medicine, CA 94305
| | - S Dejbakhsh-Jones
- Department of Medicine, Stanford University School of Medicine, CA 94305
| | - B Holm
- Department of Medicine, Stanford University School of Medicine, CA 94305
| | - H Wang
- Department of Medicine, Stanford University School of Medicine, CA 94305
| | - O Liang
- Department of Medicine, Stanford University School of Medicine, CA 94305
| | - S Strober
- Department of Medicine, Stanford University School of Medicine, CA 94305
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Palathumpat V, Dejbakhsh-Jones S, Holm B, Wang H, Liang O, Strober S. Studies of CD4- CD8- alpha beta bone marrow T cells with suppressor activity. J Immunol 1992; 148:373-80. [PMID: 1309556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The predominant T cell subset in the bone marrow of specific pathogen-free C57BL/Ka and BALB/c mice expressed the alpha beta+ TCR CD4- CD8- surface phenotype. Purified C57BL/Ka alpha beta+ TCR CD4- CD8- marrow cells obtained by cell sorting suppressed the MLR of C57BL/Ka responder and BALB/c stimulator spleen cells. Although the percentage of typical T cells in the spleen was markedly reduced in adult nude mice or normal neonatal mice as compared to the normal adult, the percentage of alpha beta+ TCR CD4- CD8- cells in the spleen and marrow was not. The percentage of "self-reactive" V beta 5+ T cells in the BALB/c spleen was markedly reduced as compared to that in the C57BL/Ka spleen. However, the percentages in the bone marrow were similar. The results indicate that the predominant subset of marrow T cells in these pathogen-free mice differ with regard to surface marker phenotype, function, dependence on the adult thymus, and deletion of certain self-reactive V beta receptors as compared to typical spleen T cells. The marrow T cells appear to develop directly from marrow precursors without rearranged beta chain genes during a 48 hour in vitro culture.
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Affiliation(s)
- V Palathumpat
- Department of Medicine, Stanford University School of Medicine, CA 94305
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