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Turpin R, Liu R, Munne PM, Peura A, Rannikko JH, Philips G, Boeckx B, Salmelin N, Hurskainen E, Suleymanova I, Aung J, Vuorinen EM, Lehtinen L, Mutka M, Kovanen PE, Niinikoski L, Meretoja TJ, Mattson J, Mustjoki S, Saavalainen P, Goga A, Lambrechts D, Pouwels J, Hollmén M, Klefström J. Respiratory complex I regulates dendritic cell maturation in explant model of human tumor immune microenvironment. J Immunother Cancer 2024; 12:e008053. [PMID: 38604809 PMCID: PMC11015234 DOI: 10.1136/jitc-2023-008053] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/04/2024] [Indexed: 04/13/2024] Open
Abstract
BACKGROUND Combining cytotoxic chemotherapy or novel anticancer drugs with T-cell modulators holds great promise in treating advanced cancers. However, the response varies depending on the tumor immune microenvironment (TIME). Therefore, there is a clear need for pharmacologically tractable models of the TIME to dissect its influence on mono- and combination treatment response at the individual level. METHODS Here we establish a patient-derived explant culture (PDEC) model of breast cancer, which retains the immune contexture of the primary tumor, recapitulating cytokine profiles and CD8+T cell cytotoxic activity. RESULTS We explored the immunomodulatory action of a synthetic lethal BCL2 inhibitor venetoclax+metformin drug combination ex vivo, discovering metformin cannot overcome the lymphocyte-depleting action of venetoclax. Instead, metformin promotes dendritic cell maturation through inhibition of mitochondrial complex I, increasing their capacity to co-stimulate CD4+T cells and thus facilitating antitumor immunity. CONCLUSIONS Our results establish PDECs as a feasible model to identify immunomodulatory functions of anticancer drugs in the context of patient-specific TIME.
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Affiliation(s)
- Rita Turpin
- Translational Cancer Medicine, University of Helsinki, Helsinki, Finland
| | - Ruixian Liu
- Translational Cancer Medicine, University of Helsinki, Helsinki, Finland
| | - Pauliina M Munne
- Translational Cancer Medicine, University of Helsinki, Helsinki, Finland
| | - Aino Peura
- Translational Cancer Medicine, University of Helsinki, Helsinki, Finland
| | | | | | - Bram Boeckx
- Department of Human Genetics, KU Leuven, Leuven, Belgium
| | - Natasha Salmelin
- Translational Cancer Medicine, University of Helsinki, Helsinki, Finland
| | - Elina Hurskainen
- Translational Cancer Medicine, University of Helsinki, Helsinki, Finland
| | - Ilida Suleymanova
- Translational Cancer Medicine, University of Helsinki, Helsinki, Finland
| | - July Aung
- University of Helsinki Faculty of Medicine, Helsinki, Finland
| | | | | | - Minna Mutka
- Department of Pathology, Helsinki University Central Hospital, Helsinki, Finland
| | - Panu E Kovanen
- Department of Pathology, HUSLAB, Helsinki University Central Hospital, Helsinki, Finland
| | - Laura Niinikoski
- Breast Surgery Unit, Helsinki University Central Hospital Comprehensive Cancer Center, Helsinki, Finland
| | - Tuomo J Meretoja
- Breast Surgery Unit, Helsinki University Central Hospital Comprehensive Cancer Center, Helsinki, Finland
| | - Johanna Mattson
- Department of oncology, Helsinki University Central Hospital, Helsinki, Finland
| | - Satu Mustjoki
- TRIMM, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
- University of Helsinki Helsinki Institute of Life Sciences, Helsinki, Finland
| | | | - Andrei Goga
- Department of Cell & Tissue Biology, UCSF, San Francisco, California, USA
| | | | - Jeroen Pouwels
- Translational Cancer Medicine, University of Helsinki, Helsinki, Finland
| | | | - Juha Klefström
- Translational Cancer Medicine, University of Helsinki, Helsinki, Finland
- Finnish Cancer Institute, Helsinki, Finland
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Heilala M, Lehtonen A, Arasalo O, Peura A, Pokki J, Ikkala O, Nonappa, Klefström J, Munne PM. Fibrin Stiffness Regulates Phenotypic Plasticity of Metastatic Breast Cancer Cells. Adv Healthc Mater 2023; 12:e2301137. [PMID: 37671812 DOI: 10.1002/adhm.202301137] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 08/18/2023] [Indexed: 09/07/2023]
Abstract
The extracellular matrix (ECM)-regulated phenotypic plasticity is crucial for metastatic progression of triple negative breast cancer (TNBC). While ECM faithful cell-based models are available for in situ and invasive tumors, such as cell aggregate cultures in reconstituted basement membrane and in collagenous gels, there are no ECM faithful models for metastatic circulating tumor cells (CTCs). Such models are essential to represent the stage of metastasis where clinical relevance and therapeutic opportunities are significant. Here, CTC-like DU4475 TNBC cells are cultured in mechanically tunable 3D fibrin hydrogels. This is motivated, as in circulation fibrin aids CTC survival by forming a protective coating reducing shear stress and immune cell-mediated cytotoxicity and promotes several stages of late metastatic processes at the interface between circulation and tissue. This work shows that fibrin hydrogels support DU4475 cell growth, resulting in spheroid formation. Furthermore, increasing fibrin stiffness from 57 to 175 Pa leads to highly motile, actin and tubulin containing cellular protrusions, which are associated with specific cell morphology and gene expression patterns that markedly differ from basement membrane or suspension cultures. Thus, mechanically tunable fibrin gels reveal specific matrix-based regulation of TNBC cell phenotype and offer scaffolds for CTC-like cells with better mechano-biological properties than liquid.
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Affiliation(s)
- Maria Heilala
- Department of Applied Physics, Aalto University, P.O. Box 15100, Aalto, Espoo, FI-00076, Finland
| | - Arttu Lehtonen
- Department of Electrical Engineering and Automation, Aalto University, P.O. Box 12200, Aalto, Espoo, FI-00076, Finland
| | - Ossi Arasalo
- Department of Electrical Engineering and Automation, Aalto University, P.O. Box 12200, Aalto, Espoo, FI-00076, Finland
| | - Aino Peura
- Finnish Cancer Institute and FICAN South, Helsinki University Hospital & Cancer Cell Circuitry Laboratory, Translational Cancer Medicine, Medical Faculty, University of Helsinki, P.O. Box 63 (Haartmaninkatu 8), Helsinki, 00014, Finland
| | - Juho Pokki
- Department of Electrical Engineering and Automation, Aalto University, P.O. Box 12200, Aalto, Espoo, FI-00076, Finland
| | - Olli Ikkala
- Department of Applied Physics, Aalto University, P.O. Box 15100, Aalto, Espoo, FI-00076, Finland
| | - Nonappa
- Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, Tampere, FI-33720, Finland
| | - Juha Klefström
- Finnish Cancer Institute and FICAN South, Helsinki University Hospital & Cancer Cell Circuitry Laboratory, Translational Cancer Medicine, Medical Faculty, University of Helsinki, P.O. Box 63 (Haartmaninkatu 8), Helsinki, 00014, Finland
| | - Pauliina M Munne
- Finnish Cancer Institute and FICAN South, Helsinki University Hospital & Cancer Cell Circuitry Laboratory, Translational Cancer Medicine, Medical Faculty, University of Helsinki, P.O. Box 63 (Haartmaninkatu 8), Helsinki, 00014, Finland
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Turpin RJ, Liu R, Munne P, Peura A, Rannikko J, Philips G, Salmelin N, Hurskainen E, Suleymanova I, Mutka M, Meretoja T, Mattson J, Mustjoki S, Saavalainen P, Lambrechts D, Pouwels J, Hollmén M, Klefström J. Abstract 4122: TIL-containing patient-derived explant cultures reveal role of metformin on antigen presenting cell activation. Cancer Res 2023. [DOI: 10.1158/1538-7445.am2023-4122] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
Abstract
Globally, breast cancer is among the most diagnosed cancer types for women. Current and upcoming breast cancer therapies are being investigated in combination with compounds that stimulate an immune response, but whether the therapeutic agents themselves have unexpected immunomodulatory effects is often overlooked. Here, we have developed a method to grow 3D cultures of intact fragments of patient-derived tissue (Patient-Derived Explant Cultures; PDECs) to assess the preclinical potential of studying human tumor cells and immune cells simultaneously ex vivo
Single cell sequencing, flow cytometry, gene expression profiling and cytokine profiling data show that the tumor immunocontexture is conserved in PDECs and that these resident immune cells respond to distinct immune stimulus
We performed gene expression profiling, flow cytometry, and cytokine profiling of drug-treated human explants and found that metformin has antitumor potential through the activation of antigen presenting cells. We further validated in vitro that metformin-mediated APC activation is largely through mitochondrial respiration inhibition irrespective of the presence of tumor cells. Our PDEC platform highlights the preclinical potential of ex vivo explants by simultaneously offering information of tumor and immune cell toxicity and mechanism.
Citation Format: Rita J. Turpin, Ruixian Liu, Pauliina Munne, Aino Peura, Jenna Rannikko, Gino Philips, Natasha Salmelin, Elina Hurskainen, Ilida Suleymanova, Minna Mutka, Tuomo Meretoja, Johanna Mattson, Satu Mustjoki, Päivi Saavalainen, Diether Lambrechts, Jeroen Pouwels, Maija Hollmén, Juha Klefström. TIL-containing patient-derived explant cultures reveal role of metformin on antigen presenting cell activation. [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 4122.
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Affiliation(s)
| | | | | | - Aino Peura
- 1University of Helsinki, Helsinki, Finland
| | | | - Gino Philips
- 3VIB - KU Leuven Center for Cancer Biology, KU Leuven, Belgium
| | | | | | | | - Minna Mutka
- 4HUSLAB and Haartman Institute, Helsinki, Finland
| | - Tuomo Meretoja
- 5Helsinki University Central Hospital, Helsinki, Finland
| | - Johanna Mattson
- 6University of Helsinki & Helsinki University Hospital, Helsinki, Finland
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Munne P, Räty I, Peura A, Patrikainen L, Belitskin D, Klefstrom J. Abstract 286: Patient derived explant culture (PDEC) as a model for treatment resistant ERα positive breast cancers. Cancer Res 2022. [DOI: 10.1158/1538-7445.am2022-286] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Breast cancer is the most frequent cancer and leading causes of women’s death. Two thirds of breast cancers express the luminal estrogen receptor-positive (ERα+) phenotype that is initially responsive to antihormonal therapies, but often drug resistance emerges. Three-dimensional ex vivo cultures from patient-derived tumor tissue offer new opportunities for drug development and personalized treatment of cancer. However, one of the main challenges in establishing a tumor type faithful ex vivo tissue culture system is in optimization of biochemical and physical microenvironment to preserve desired phenotypic features. The ERα+ phenotype is not stable in cultured cells for reasons not fully understood. Together with Helsinki University Hospital we examined 400 patient-derived breast epithelial and breast cancer explant cultures (PDECs) grown in various three-dimensional matrix scaffolds, finding that ERα is primarily regulated by the matrix stiffness. The finding that the matrix stiffness is a central cue to the ERα phenotype reveals a mechanobiological component in breast tissue hormonal signaling and enables the development of novel therapeutic interventions. In our current study we have utilized the PDEC model to identify novel biomarkers that could predict the emergence of tamoxifen resistance in primary breast tumors.
Citation Format: Pauliina Munne, Iiris Räty, Aino Peura, Linda Patrikainen, Denis Belitskin, Juha Klefstrom. Patient derived explant culture (PDEC) as a model for treatment resistant ERα positive breast cancers [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 286.
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Affiliation(s)
| | - Iiris Räty
- 1University of Helsinki, Helsinki, Finland
| | - Aino Peura
- 1University of Helsinki, Helsinki, Finland
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Munne PM, Martikainen L, Räty I, Bertula K, Nonappa, Ruuska J, Ala-Hongisto H, Peura A, Hollmann B, Euro L, Yavuz K, Patrikainen L, Salmela M, Pokki J, Kivento M, Väänänen J, Suomi T, Nevalaita L, Mutka M, Kovanen P, Leidenius M, Meretoja T, Hukkinen K, Monni O, Pouwels J, Sahu B, Mattson J, Joensuu H, Heikkilä P, Elo LL, Metcalfe C, Junttila MR, Ikkala O, Klefström J. Compressive stress-mediated p38 activation required for ERα + phenotype in breast cancer. Nat Commun 2021; 12:6967. [PMID: 34845227 PMCID: PMC8630031 DOI: 10.1038/s41467-021-27220-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 11/04/2021] [Indexed: 01/01/2023] Open
Abstract
Breast cancer is now globally the most frequent cancer and leading cause of women's death. Two thirds of breast cancers express the luminal estrogen receptor-positive (ERα + ) phenotype that is initially responsive to antihormonal therapies, but drug resistance emerges. A major barrier to the understanding of the ERα-pathway biology and therapeutic discoveries is the restricted repertoire of luminal ERα + breast cancer models. The ERα + phenotype is not stable in cultured cells for reasons not fully understood. We examine 400 patient-derived breast epithelial and breast cancer explant cultures (PDECs) grown in various three-dimensional matrix scaffolds, finding that ERα is primarily regulated by the matrix stiffness. Matrix stiffness upregulates the ERα signaling via stress-mediated p38 activation and H3K27me3-mediated epigenetic regulation. The finding that the matrix stiffness is a central cue to the ERα phenotype reveals a mechanobiological component in breast tissue hormonal signaling and enables the development of novel therapeutic interventions. Subject terms: ER-positive (ER + ), breast cancer, ex vivo model, preclinical model, PDEC, stiffness, p38 SAPK.
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Affiliation(s)
- Pauliina M Munne
- Finnish Cancer Institute, FICAN South Helsinki University Hospital & Translational Cancer Medicine, Medical Faculty, University of Helsinki. Cancer Cell Circuitry Laboratory, PO Box 63 Haartmaninkatu 8, 00014 University of Helsinki, Helsinki, Finland
| | - Lahja Martikainen
- Department of Applied Physics, Molecular Materials Group, Aalto University School of Science, PO Box, 15100, FI-00076, Espoo, Finland
| | - Iiris Räty
- Finnish Cancer Institute, FICAN South Helsinki University Hospital & Translational Cancer Medicine, Medical Faculty, University of Helsinki. Cancer Cell Circuitry Laboratory, PO Box 63 Haartmaninkatu 8, 00014 University of Helsinki, Helsinki, Finland
| | - Kia Bertula
- Department of Applied Physics, Molecular Materials Group, Aalto University School of Science, PO Box, 15100, FI-00076, Espoo, Finland
| | - Nonappa
- Department of Applied Physics, Molecular Materials Group, Aalto University School of Science, PO Box, 15100, FI-00076, Espoo, Finland
- Department of Bioproducts and Biosystems, Aalto University School of Chemical Engineering, Espoo, Finland
| | - Janika Ruuska
- Finnish Cancer Institute, FICAN South Helsinki University Hospital & Translational Cancer Medicine, Medical Faculty, University of Helsinki. Cancer Cell Circuitry Laboratory, PO Box 63 Haartmaninkatu 8, 00014 University of Helsinki, Helsinki, Finland
| | - Hanna Ala-Hongisto
- Finnish Cancer Institute, FICAN South Helsinki University Hospital & Translational Cancer Medicine, Medical Faculty, University of Helsinki. Cancer Cell Circuitry Laboratory, PO Box 63 Haartmaninkatu 8, 00014 University of Helsinki, Helsinki, Finland
| | - Aino Peura
- Finnish Cancer Institute, FICAN South Helsinki University Hospital & Translational Cancer Medicine, Medical Faculty, University of Helsinki. Cancer Cell Circuitry Laboratory, PO Box 63 Haartmaninkatu 8, 00014 University of Helsinki, Helsinki, Finland
| | - Babette Hollmann
- Finnish Cancer Institute, FICAN South Helsinki University Hospital & Translational Cancer Medicine, Medical Faculty, University of Helsinki. Cancer Cell Circuitry Laboratory, PO Box 63 Haartmaninkatu 8, 00014 University of Helsinki, Helsinki, Finland
| | - Lilya Euro
- Research Program of Stem Cells and Metabolism, Biomedicum Helsinki, University of Helsinki, 00290, Helsinki, Finland
| | - Kerim Yavuz
- Applied Tumor Genomics Research Program, Enhancer Biology Laboratory, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Linda Patrikainen
- Finnish Cancer Institute, FICAN South Helsinki University Hospital & Translational Cancer Medicine, Medical Faculty, University of Helsinki. Cancer Cell Circuitry Laboratory, PO Box 63 Haartmaninkatu 8, 00014 University of Helsinki, Helsinki, Finland
| | - Maria Salmela
- Finnish Cancer Institute, FICAN South Helsinki University Hospital & Translational Cancer Medicine, Medical Faculty, University of Helsinki. Cancer Cell Circuitry Laboratory, PO Box 63 Haartmaninkatu 8, 00014 University of Helsinki, Helsinki, Finland
| | - Juho Pokki
- Department of Electrical Engineering and Automation, Aalto University, Espoo, Finland
| | - Mikko Kivento
- Applied Tumor Genomics Research Program, Faculty of Medicine, Oncogenomics Laboratory, University of Helsinki, Helsinki, Finland
| | - Juho Väänänen
- Applied Tumor Genomics Research Program, Faculty of Medicine, Oncogenomics Laboratory, University of Helsinki, Helsinki, Finland
| | - Tomi Suomi
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, FI-20520, Turku, Finland
| | - Liina Nevalaita
- Finnish Cancer Institute, FICAN South Helsinki University Hospital & Translational Cancer Medicine, Medical Faculty, University of Helsinki. Cancer Cell Circuitry Laboratory, PO Box 63 Haartmaninkatu 8, 00014 University of Helsinki, Helsinki, Finland
| | - Minna Mutka
- Department of Pathology, HUSLAB and Haartman Institute, Helsinki University Central Hospital and University of Helsinki, Helsinki, Finland
| | - Panu Kovanen
- Department of Pathology, HUSLAB and Haartman Institute, Helsinki University Central Hospital and University of Helsinki, Helsinki, Finland
| | - Marjut Leidenius
- Breast Surgery Unit, Helsinki University Central Hospital, Helsinki, Finland
| | - Tuomo Meretoja
- Breast Surgery Unit, Helsinki University Central Hospital, Helsinki, Finland
| | - Katja Hukkinen
- Department of Mammography, Helsinki University Central Hospital, Helsinki, Finland
| | - Outi Monni
- Applied Tumor Genomics Research Program, Faculty of Medicine, Oncogenomics Laboratory, University of Helsinki, Helsinki, Finland
| | - Jeroen Pouwels
- Finnish Cancer Institute, FICAN South Helsinki University Hospital & Translational Cancer Medicine, Medical Faculty, University of Helsinki. Cancer Cell Circuitry Laboratory, PO Box 63 Haartmaninkatu 8, 00014 University of Helsinki, Helsinki, Finland
| | - Biswajyoti Sahu
- Applied Tumor Genomics Research Program, Enhancer Biology Laboratory, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Johanna Mattson
- Department of Oncology, University of Helsinki & Helsinki University Hospital, Helsinki, Finland
| | - Heikki Joensuu
- Department of Oncology, University of Helsinki & Helsinki University Hospital, Helsinki, Finland
| | - Päivi Heikkilä
- Department of Pathology, HUSLAB and Haartman Institute, Helsinki University Central Hospital and University of Helsinki, Helsinki, Finland
| | - Laura L Elo
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, FI-20520, Turku, Finland
| | - Ciara Metcalfe
- Genentech Inc., 1 DNA Way, South San Francisco, CA, 94080, USA
| | | | - Olli Ikkala
- Department of Applied Physics, Molecular Materials Group, Aalto University School of Science, PO Box, 15100, FI-00076, Espoo, Finland
- Department of Bioproducts and Biosystems, Aalto University School of Chemical Engineering, Espoo, Finland
| | - Juha Klefström
- Finnish Cancer Institute, FICAN South Helsinki University Hospital & Translational Cancer Medicine, Medical Faculty, University of Helsinki. Cancer Cell Circuitry Laboratory, PO Box 63 Haartmaninkatu 8, 00014 University of Helsinki, Helsinki, Finland.
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Munne PM, Martikainen L, Räty I, Bertula K, Nonappa N, Peura A, Mutka M, Leidenius M, Meretoja T, Kovanen P, Mattson J, Heikkila P, Joensuu H, Ikkala O, Klefstrom JT. Abstract 2966: Novel ex vivo model for ERα positive breast cancer. Cancer Res 2021. [DOI: 10.1158/1538-7445.am2021-2966] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Three-dimensional ex vivo cultures from patient-derived tumor tissue offer new opportunities for drug development and personalized treatment of cancer. However, one of the main challenges in establishing a tumor type faithful ex vivo tissue culture system is in optimization of biochemical and physical microenvironment to preserve desired phenotypic features. A collaboration with the Helsinki University Hospital enables us to receive live patient-derived breast cancer tissue samples from most breast cancer surgeries performed in the Southern Finland, typically samples arriving twice a week. Together with a group of materials scientists from Aalto Technical University we have explored seven different 3D culture matrices and defined their biomechanical properties and stiffness values with rheological measurements. Four investigated matrices preserved the luminal CK8+ cell phenotype of the luminal cancers they derived from, whereas rest of the matrices that included commonly used Matrigel and collagen scaffolds promoted a switch in the cell identity from luminal CK8+ to basal CK14+ phenotype. Furthermore, the genetic expression profiles examined with NGS corresponded to observed phenotypic switch. We noticed significant species-specific differences between mouse mammary and human breast samples in their morphology, phenotypic responses and ERα+ preservation to microenvironmental matrix stiffness. Furthermore, a combination of scaffold stiffness and composition of biochemical matrix constituency is required for long-term maintenance of ERα+ luminal tumour phenotype. Therefore, both physical properties and composition of the microenvironment need to be optimized for maintenance of breast tumor type specific phenotype and genetic profiles of ex vivo tumor explant cultures.
Citation Format: Pauliina M. Munne, Lahja Martikainen, Iiris Räty, Kia Bertula, Nonappa Nonappa, Aino Peura, Minna Mutka, Marjut Leidenius, Tuomo Meretoja, Panu Kovanen, Johanna Mattson, Paivi Heikkila, Heikki Joensuu, Olli Ikkala, Juha T. Klefstrom. Novel ex vivo model for ERα positive breast cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2021; 2021 Apr 10-15 and May 17-21. Philadelphia (PA): AACR; Cancer Res 2021;81(13_Suppl):Abstract nr 2966.
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Affiliation(s)
| | | | - Iiris Räty
- 1University of Helsinki, Helsinki, Finland
| | - Kia Bertula
- 2Aalto University School of Science, Helsinki, Finland
| | | | - Aino Peura
- 1University of Helsinki, Helsinki, Finland
| | - Minna Mutka
- 3Helsinki University Central Hospital and University of Helsinki, Helsinki, Finland
| | | | - Tuomo Meretoja
- 4Helsinki University Central Hospital, Helsinki, Finland
| | - Panu Kovanen
- 3Helsinki University Central Hospital and University of Helsinki, Helsinki, Finland
| | - Johanna Mattson
- 5Helsinki University Hospital & University of Helsinki, Helsinki, Finland
| | - Paivi Heikkila
- 3Helsinki University Central Hospital and University of Helsinki, Helsinki, Finland
| | - Heikki Joensuu
- 6Helsinki University Hospital & University of Helsinki, Helsinki, Finland
| | - Olli Ikkala
- 2Aalto University School of Science, Helsinki, Finland
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Highet AR, Bianco-Miotto T, Pringle KG, Peura A, Bent S, Zhang J, Nottle MB, Thompson JG, Roberts CT. A novel embryo culture media supplement that improves pregnancy rates in mice. Reproduction 2017; 153:327-340. [DOI: 10.1530/rep-16-0517] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 11/30/2016] [Accepted: 12/19/2016] [Indexed: 11/08/2022]
Abstract
The preimplantation embryoinvivois exposed to numerous growth factors in the female reproductive tract, which are not recapitulated in embryo culture mediain vitro. The IGF2 and plasminogen activator systems facilitate blastocyst development. We hypothesized that the addition of IGF2 in combination with urokinase plasminogen activator (uPA) and plasminogen could improve rates of blastocyst hatching and implantation in mice. B6BcF1 and CBAB6F2 mouse embryos were divided into one of four supplemented culture media treatment groups: (1) control (media only); (2) 12.5 nM IGF2; (3) 10 µg/mL uPA and 5 µg/mL plasminogen; or (4) a combination of IGF2, uPA and plasminogen treatments. Embryo development to blastocyst stage and hatching were assessed before transfer to pseudopregnant recipient females and implantation, pregnancy rates and postnatal growth were assessed. After 90.5 h of culture, IGF2 + U + P treatment increased the percentage of B6BcF1 embryos that were hatching/hatched and percentage developing to blastocyst stage compared with controls (P < 0.02). Following B6BcF1 embryo transfer, IGF2 + U + P treatment increased implantation sites at day 8 of pregnancy compared with controls (P < 0.05). Replication in the CBAB6F2 mouse strain showed significant improvements in pregnancy rates at days 8 and 18 but not in blastocyst development. No adverse effects were seen on gestational age, litter size or birthweight, or the reproductive capacity of offspring of IGF2 + U + P treated embryos. For embryos susceptible to detrimental effects ofin vitroculture, IGF2, uPA and plasminogen supplementation of culture media can improve pregnancy success, but the effect of treatment is dependent on the mouse strain.
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Helin-Salmivaara A, Nikkarinen T, Heinänen T, Peura A. [Problem-based learning needed even in the further education]. Duodecim 2002; 115:2011-7. [PMID: 11941819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Affiliation(s)
- A Helin-Salmivaara
- ROHTO-toiminta-ohjelma Suomalainen Lääkäriseura Duodecim PL 713, 00101 Helsinki.
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Abstract
Early cleavage stage human embryos and 8-cell mouse embryos were snap-frozen after a brief exposure to high concentrations of dimethyl sulfoxide (DMSO; 2 or 3.5 M) and 0.25 M sucrose and thawed in a warm water bath. Eleven of 12 3- to 8-cell human embryos survived freezing and thawing with more than 50% of their original blastomeres intact. However, pregnancy was not initiated when the 11 embryos were transferred to six patients. It was shown that continuation of embryonic development in vitro and in vivo was significantly better when 8-cell mouse embryos were snap-frozen in 3.5 M DMSO than in 2 M DMSO. When frozen in 3.5 M DMSO, 78% of 8-cell embryos survived on thawing, 84% developed to blastocysts in vitro, 63% implanted, and 42% developed to fetuses. Ultrarapid freezing is a quick and inexpensive method for mouse embryo cryobanking, but further studies are required to confirm the viability of frozen human embryos.
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Affiliation(s)
- A Trounson
- Centre for Early Human Development, Monash Medical Centre, Clayton, Victoria, Australia
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Abstract
The authors describe a rapid freezing method (ultrarapid freezing) that has been developed for cryopreservation of early cleavage stage embryos. In the present experiments, 2-cell mouse embryos were frozen under a wide range of conditions in an attempt to optimize their survival and viability in vitro and in vivo. The experiments show that embryos exposed briefly (2 to 2.5 minutes) to relatively high concentrations of dimethyl sulfoxide (3 to 4 M) and 0.25 M sucrose survive and develop when plunged directly into liquid nitrogen and thawed in a 37 degrees C waterbath when sealed in 0.25-ml plastic pailettes. Survival and viability rates of ultrarapidly frozen embryos after thawing were comparable to those obtained with conventional slow-freezing techniques. The authors believe that this freezing technique can be further improved and that the speed, ease, and low cost of the method make it a very attractive alternative to more conventional methods for freezing early cleavage stage embryos.
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Affiliation(s)
- A Trounson
- Centre for Early Human Development, Monash University, Monash Medical Centre, Melbourne, Victoria, Australia
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Pihl E, Peura A, Johnson WR, McDermott FT, Hughes ES. T-antigen expression by peanut agglutinin staining relates to mucosal dysplasia in ulcerative colitis. Dis Colon Rectum 1985; 28:11-7. [PMID: 3971794 DOI: 10.1007/bf02553898] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Staining of 326 rectal mucosal biopsies from ulcerative colitis patients with peanut agglutinin (PNA), which binds to the T-blood group antigen and has been claimed to reflect a cancer-associated mucin alteration, showed highly significant direct associations with mucosal dysplasia (P less than 0.001), disease activity (P less than 0.001), and subsequent development of rectal cancer in a smaller series of patients (P = 0.005). Staining for normal colonic mucin by the Dolichos biflorus (DBA) lectin related significantly and inversely to dysplasia. Intense normal colon mucin staining by DBA related significantly (P less than 0.025) to long disease duration and to subsequent development of cancer (P = 0.02). The latter association is based on a small number of patients only and is not considered conclusive evidence, but may provide a link with goblet-cell hyperplasia. The authors conclude that although T-antigen expression relates to dysplasia, the findings of "false" positive and negative rates of 22 and 33 percent respectively, make it unlikely that staining of biopsy sections for the T-antigen by peanut agglutinin will contribute materially to routine assessment for dysplasia and cancer risk prediction in patients with ulcerative colitis.
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