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MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE
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Zeitschriftentitel: | Neuro-Oncology |
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Personen und Körperschaften: | , , , , , , , , , , , , , , , , , , , , , , , , , , |
In: | Neuro-Oncology, 21, 2019, Supplement_2, S. ii108-ii109 |
Format: | E-Article |
Sprache: | Englisch |
veröffentlicht: |
Oxford University Press (OUP)
|
Schlagwörter: |
author_facet |
Bolin, Sara Savov, Vasil Borgenvik, Anna Rosen, Gabriela Garancher, Alexandra Rahmanto, Aldwin Suryo Hutter, Sonja Mainwaring, Oliver Olausson, Karl Holmberg Rusert, Jessica Sundstrom, Anders Richardson, Stacey Fotaki, Grammatiki Hill, Rebecca Dubuc, Adrian Kalushkova, Antonia Remke, Marc Cancer, Matko Jernberg-Wiklund, Helena Ramaswamy, Vijay Taylor, Michael Sangfelt, Olle Clifford, Steven Schuller, Ulrich Wechsler-Reya, Robert Weishaupt, Holger Swartling, Fredrik Bolin, Sara Savov, Vasil Borgenvik, Anna Rosen, Gabriela Garancher, Alexandra Rahmanto, Aldwin Suryo Hutter, Sonja Mainwaring, Oliver Olausson, Karl Holmberg Rusert, Jessica Sundstrom, Anders Richardson, Stacey Fotaki, Grammatiki Hill, Rebecca Dubuc, Adrian Kalushkova, Antonia Remke, Marc Cancer, Matko Jernberg-Wiklund, Helena Ramaswamy, Vijay Taylor, Michael Sangfelt, Olle Clifford, Steven Schuller, Ulrich Wechsler-Reya, Robert Weishaupt, Holger Swartling, Fredrik |
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author |
Bolin, Sara Savov, Vasil Borgenvik, Anna Rosen, Gabriela Garancher, Alexandra Rahmanto, Aldwin Suryo Hutter, Sonja Mainwaring, Oliver Olausson, Karl Holmberg Rusert, Jessica Sundstrom, Anders Richardson, Stacey Fotaki, Grammatiki Hill, Rebecca Dubuc, Adrian Kalushkova, Antonia Remke, Marc Cancer, Matko Jernberg-Wiklund, Helena Ramaswamy, Vijay Taylor, Michael Sangfelt, Olle Clifford, Steven Schuller, Ulrich Wechsler-Reya, Robert Weishaupt, Holger Swartling, Fredrik |
spellingShingle |
Bolin, Sara Savov, Vasil Borgenvik, Anna Rosen, Gabriela Garancher, Alexandra Rahmanto, Aldwin Suryo Hutter, Sonja Mainwaring, Oliver Olausson, Karl Holmberg Rusert, Jessica Sundstrom, Anders Richardson, Stacey Fotaki, Grammatiki Hill, Rebecca Dubuc, Adrian Kalushkova, Antonia Remke, Marc Cancer, Matko Jernberg-Wiklund, Helena Ramaswamy, Vijay Taylor, Michael Sangfelt, Olle Clifford, Steven Schuller, Ulrich Wechsler-Reya, Robert Weishaupt, Holger Swartling, Fredrik Neuro-Oncology MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE Cancer Research Neurology (clinical) Oncology |
author_sort |
bolin, sara |
spelling |
Bolin, Sara Savov, Vasil Borgenvik, Anna Rosen, Gabriela Garancher, Alexandra Rahmanto, Aldwin Suryo Hutter, Sonja Mainwaring, Oliver Olausson, Karl Holmberg Rusert, Jessica Sundstrom, Anders Richardson, Stacey Fotaki, Grammatiki Hill, Rebecca Dubuc, Adrian Kalushkova, Antonia Remke, Marc Cancer, Matko Jernberg-Wiklund, Helena Ramaswamy, Vijay Taylor, Michael Sangfelt, Olle Clifford, Steven Schuller, Ulrich Wechsler-Reya, Robert Weishaupt, Holger Swartling, Fredrik 1522-8517 1523-5866 Oxford University Press (OUP) Cancer Research Neurology (clinical) Oncology http://dx.doi.org/10.1093/neuonc/noz036.185 <jats:title>Abstract</jats:title> <jats:p>Tumor recurrence is the leading cause of death among children with medulloblastoma, the most common type of malignant pediatric brain tumors. The mechanisms behind medulloblastoma recurrence are not fully understood. We previously showed that the transcription factor SOX9 promotes cisplatin treatment resistance in medulloblastoma. Here we show that SOX9 levels correlate with poor prognosis in Group 3 tumors. By studying paired primary-recurrent medulloblastoma samples and patient-derived xenograft (PDX) models we further identified rare SOX9-positive slow-cycling, therapy-resistant tumor cells that accumulate in relapses and in leptomenigeal metastases of Group 3 and Group 4 patients. By using an inducible Tet-OFF transgenic (GTML) mouse model for malignant MYCN-driven Group 3 tumors we identified rare SOX9-positive, quiescent brain tumor cells that are more resistant to cisplatin. Dox treatment normally cures GTML transgenic animals that developed aggressive medulloblastoma by turning MYCN off. However, when crossing the Tet-OFF GTML model with a Tet-ON rtTA-Sox9 model we can redirect MYCN expression to the Sox9 promoter ultimately driving brain tumor recurrence from rare SOX9-positive cells with 100% penetrance. In this novel animal model, recurrent tumors were actively disseminating from the hindbrain to the spinal cord and into the forebrain similar to distant relapses found in patients. By overexpressing SOX9 in human Group 3 tumor cells, MYC was directly inhibited and cell proliferation was decreased. PDX models of Group 3 tumors further showed increased levels of SOX9-positivity and less proliferative cells in metastatic compartments. Expression profiling revealed that recurrences were more inflammatory, metastatic, immune evasive and showed elevated MGMT methyltransferase levels which depleted recurrent cells and sensitized them for chemotherapy when using the MGMT inhibitor lomeguatrib. To summarize, our data clarify important and complex mechanisms by which latent medulloblastoma cells fail to respond to standard therapy and generate relapses.</jats:p> MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE Neuro-Oncology |
doi_str_mv |
10.1093/neuonc/noz036.185 |
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Oxford University Press (OUP), 2019 |
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Oxford University Press (OUP), 2019 |
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Oxford University Press (OUP) |
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Neuro-Oncology |
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49 |
title |
MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE |
title_unstemmed |
MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE |
title_full |
MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE |
title_fullStr |
MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE |
title_full_unstemmed |
MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE |
title_short |
MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE |
title_sort |
medu-26. latent sox9-positive cells responsible for myc-driven medulloblastoma recurrence |
topic |
Cancer Research Neurology (clinical) Oncology |
url |
http://dx.doi.org/10.1093/neuonc/noz036.185 |
publishDate |
2019 |
physical |
ii108-ii109 |
description |
<jats:title>Abstract</jats:title>
<jats:p>Tumor recurrence is the leading cause of death among children with medulloblastoma, the most common type of malignant pediatric brain tumors. The mechanisms behind medulloblastoma recurrence are not fully understood. We previously showed that the transcription factor SOX9 promotes cisplatin treatment resistance in medulloblastoma. Here we show that SOX9 levels correlate with poor prognosis in Group 3 tumors. By studying paired primary-recurrent medulloblastoma samples and patient-derived xenograft (PDX) models we further identified rare SOX9-positive slow-cycling, therapy-resistant tumor cells that accumulate in relapses and in leptomenigeal metastases of Group 3 and Group 4 patients. By using an inducible Tet-OFF transgenic (GTML) mouse model for malignant MYCN-driven Group 3 tumors we identified rare SOX9-positive, quiescent brain tumor cells that are more resistant to cisplatin. Dox treatment normally cures GTML transgenic animals that developed aggressive medulloblastoma by turning MYCN off. However, when crossing the Tet-OFF GTML model with a Tet-ON rtTA-Sox9 model we can redirect MYCN expression to the Sox9 promoter ultimately driving brain tumor recurrence from rare SOX9-positive cells with 100% penetrance. In this novel animal model, recurrent tumors were actively disseminating from the hindbrain to the spinal cord and into the forebrain similar to distant relapses found in patients. By overexpressing SOX9 in human Group 3 tumor cells, MYC was directly inhibited and cell proliferation was decreased. PDX models of Group 3 tumors further showed increased levels of SOX9-positivity and less proliferative cells in metastatic compartments. Expression profiling revealed that recurrences were more inflammatory, metastatic, immune evasive and showed elevated MGMT methyltransferase levels which depleted recurrent cells and sensitized them for chemotherapy when using the MGMT inhibitor lomeguatrib. To summarize, our data clarify important and complex mechanisms by which latent medulloblastoma cells fail to respond to standard therapy and generate relapses.</jats:p> |
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author | Bolin, Sara, Savov, Vasil, Borgenvik, Anna, Rosen, Gabriela, Garancher, Alexandra, Rahmanto, Aldwin Suryo, Hutter, Sonja, Mainwaring, Oliver, Olausson, Karl Holmberg, Rusert, Jessica, Sundstrom, Anders, Richardson, Stacey, Fotaki, Grammatiki, Hill, Rebecca, Dubuc, Adrian, Kalushkova, Antonia, Remke, Marc, Cancer, Matko, Jernberg-Wiklund, Helena, Ramaswamy, Vijay, Taylor, Michael, Sangfelt, Olle, Clifford, Steven, Schuller, Ulrich, Wechsler-Reya, Robert, Weishaupt, Holger, Swartling, Fredrik |
author_facet | Bolin, Sara, Savov, Vasil, Borgenvik, Anna, Rosen, Gabriela, Garancher, Alexandra, Rahmanto, Aldwin Suryo, Hutter, Sonja, Mainwaring, Oliver, Olausson, Karl Holmberg, Rusert, Jessica, Sundstrom, Anders, Richardson, Stacey, Fotaki, Grammatiki, Hill, Rebecca, Dubuc, Adrian, Kalushkova, Antonia, Remke, Marc, Cancer, Matko, Jernberg-Wiklund, Helena, Ramaswamy, Vijay, Taylor, Michael, Sangfelt, Olle, Clifford, Steven, Schuller, Ulrich, Wechsler-Reya, Robert, Weishaupt, Holger, Swartling, Fredrik, Bolin, Sara, Savov, Vasil, Borgenvik, Anna, Rosen, Gabriela, Garancher, Alexandra, Rahmanto, Aldwin Suryo, Hutter, Sonja, Mainwaring, Oliver, Olausson, Karl Holmberg, Rusert, Jessica, Sundstrom, Anders, Richardson, Stacey, Fotaki, Grammatiki, Hill, Rebecca, Dubuc, Adrian, Kalushkova, Antonia, Remke, Marc, Cancer, Matko, Jernberg-Wiklund, Helena, Ramaswamy, Vijay, Taylor, Michael, Sangfelt, Olle, Clifford, Steven, Schuller, Ulrich, Wechsler-Reya, Robert, Weishaupt, Holger, Swartling, Fredrik |
author_sort | bolin, sara |
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description | <jats:title>Abstract</jats:title> <jats:p>Tumor recurrence is the leading cause of death among children with medulloblastoma, the most common type of malignant pediatric brain tumors. The mechanisms behind medulloblastoma recurrence are not fully understood. We previously showed that the transcription factor SOX9 promotes cisplatin treatment resistance in medulloblastoma. Here we show that SOX9 levels correlate with poor prognosis in Group 3 tumors. By studying paired primary-recurrent medulloblastoma samples and patient-derived xenograft (PDX) models we further identified rare SOX9-positive slow-cycling, therapy-resistant tumor cells that accumulate in relapses and in leptomenigeal metastases of Group 3 and Group 4 patients. By using an inducible Tet-OFF transgenic (GTML) mouse model for malignant MYCN-driven Group 3 tumors we identified rare SOX9-positive, quiescent brain tumor cells that are more resistant to cisplatin. Dox treatment normally cures GTML transgenic animals that developed aggressive medulloblastoma by turning MYCN off. However, when crossing the Tet-OFF GTML model with a Tet-ON rtTA-Sox9 model we can redirect MYCN expression to the Sox9 promoter ultimately driving brain tumor recurrence from rare SOX9-positive cells with 100% penetrance. In this novel animal model, recurrent tumors were actively disseminating from the hindbrain to the spinal cord and into the forebrain similar to distant relapses found in patients. By overexpressing SOX9 in human Group 3 tumor cells, MYC was directly inhibited and cell proliferation was decreased. PDX models of Group 3 tumors further showed increased levels of SOX9-positivity and less proliferative cells in metastatic compartments. Expression profiling revealed that recurrences were more inflammatory, metastatic, immune evasive and showed elevated MGMT methyltransferase levels which depleted recurrent cells and sensitized them for chemotherapy when using the MGMT inhibitor lomeguatrib. To summarize, our data clarify important and complex mechanisms by which latent medulloblastoma cells fail to respond to standard therapy and generate relapses.</jats:p> |
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spelling | Bolin, Sara Savov, Vasil Borgenvik, Anna Rosen, Gabriela Garancher, Alexandra Rahmanto, Aldwin Suryo Hutter, Sonja Mainwaring, Oliver Olausson, Karl Holmberg Rusert, Jessica Sundstrom, Anders Richardson, Stacey Fotaki, Grammatiki Hill, Rebecca Dubuc, Adrian Kalushkova, Antonia Remke, Marc Cancer, Matko Jernberg-Wiklund, Helena Ramaswamy, Vijay Taylor, Michael Sangfelt, Olle Clifford, Steven Schuller, Ulrich Wechsler-Reya, Robert Weishaupt, Holger Swartling, Fredrik 1522-8517 1523-5866 Oxford University Press (OUP) Cancer Research Neurology (clinical) Oncology http://dx.doi.org/10.1093/neuonc/noz036.185 <jats:title>Abstract</jats:title> <jats:p>Tumor recurrence is the leading cause of death among children with medulloblastoma, the most common type of malignant pediatric brain tumors. The mechanisms behind medulloblastoma recurrence are not fully understood. We previously showed that the transcription factor SOX9 promotes cisplatin treatment resistance in medulloblastoma. Here we show that SOX9 levels correlate with poor prognosis in Group 3 tumors. By studying paired primary-recurrent medulloblastoma samples and patient-derived xenograft (PDX) models we further identified rare SOX9-positive slow-cycling, therapy-resistant tumor cells that accumulate in relapses and in leptomenigeal metastases of Group 3 and Group 4 patients. By using an inducible Tet-OFF transgenic (GTML) mouse model for malignant MYCN-driven Group 3 tumors we identified rare SOX9-positive, quiescent brain tumor cells that are more resistant to cisplatin. Dox treatment normally cures GTML transgenic animals that developed aggressive medulloblastoma by turning MYCN off. However, when crossing the Tet-OFF GTML model with a Tet-ON rtTA-Sox9 model we can redirect MYCN expression to the Sox9 promoter ultimately driving brain tumor recurrence from rare SOX9-positive cells with 100% penetrance. In this novel animal model, recurrent tumors were actively disseminating from the hindbrain to the spinal cord and into the forebrain similar to distant relapses found in patients. By overexpressing SOX9 in human Group 3 tumor cells, MYC was directly inhibited and cell proliferation was decreased. PDX models of Group 3 tumors further showed increased levels of SOX9-positivity and less proliferative cells in metastatic compartments. Expression profiling revealed that recurrences were more inflammatory, metastatic, immune evasive and showed elevated MGMT methyltransferase levels which depleted recurrent cells and sensitized them for chemotherapy when using the MGMT inhibitor lomeguatrib. To summarize, our data clarify important and complex mechanisms by which latent medulloblastoma cells fail to respond to standard therapy and generate relapses.</jats:p> MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE Neuro-Oncology |
spellingShingle | Bolin, Sara, Savov, Vasil, Borgenvik, Anna, Rosen, Gabriela, Garancher, Alexandra, Rahmanto, Aldwin Suryo, Hutter, Sonja, Mainwaring, Oliver, Olausson, Karl Holmberg, Rusert, Jessica, Sundstrom, Anders, Richardson, Stacey, Fotaki, Grammatiki, Hill, Rebecca, Dubuc, Adrian, Kalushkova, Antonia, Remke, Marc, Cancer, Matko, Jernberg-Wiklund, Helena, Ramaswamy, Vijay, Taylor, Michael, Sangfelt, Olle, Clifford, Steven, Schuller, Ulrich, Wechsler-Reya, Robert, Weishaupt, Holger, Swartling, Fredrik, Neuro-Oncology, MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE, Cancer Research, Neurology (clinical), Oncology |
title | MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE |
title_full | MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE |
title_fullStr | MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE |
title_full_unstemmed | MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE |
title_short | MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE |
title_sort | medu-26. latent sox9-positive cells responsible for myc-driven medulloblastoma recurrence |
title_unstemmed | MEDU-26. LATENT SOX9-POSITIVE CELLS RESPONSIBLE FOR MYC-DRIVEN MEDULLOBLASTOMA RECURRENCE |
topic | Cancer Research, Neurology (clinical), Oncology |
url | http://dx.doi.org/10.1093/neuonc/noz036.185 |