HSP90 inhibition results in apoptosis of Philadelphia acute lymphoblastic leukaemia cells: an attractive prospect of new targeted agents
Purpose HSP90 targeting is a promising therapeutic approach in cancer. 17-AAG is an HSP90 inhibitor with completed Phase I trials in patients with advanced cancer and recently published Phase II trials. The aim of this work was to study the expression of HSP 90 and apoptotic proteins, the effects in...
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| Autor*in: |
Tavernier, Emmanuelle [verfasserIn] Flandrin-Gresta, Pascale [verfasserIn] Solly, Françoise [verfasserIn] Rigollet, Lauren [verfasserIn] Cornillon, Jérôme [verfasserIn] Augeul-Meunier, Karine [verfasserIn] Stephan, Jean-Louis [verfasserIn] Montmartin, Aurélie [verfasserIn] Viallet, Annie [verfasserIn] Guyotat, Denis [verfasserIn] Campos, Lydia [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2012 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Journal of cancer research and clinical oncology - Berlin : Springer, 1904, 138(2012), 10 vom: 17. Juni, Seite 1753-1758 |
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| Übergeordnetes Werk: |
volume:138 ; year:2012 ; number:10 ; day:17 ; month:06 ; pages:1753-1758 |
| Links: |
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| DOI / URN: |
10.1007/s00432-012-1247-6 |
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| Katalog-ID: |
SPR005847885 |
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| 100 | 1 | |a Tavernier, Emmanuelle |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a HSP90 inhibition results in apoptosis of Philadelphia acute lymphoblastic leukaemia cells: an attractive prospect of new targeted agents |
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| 520 | |a Purpose HSP90 targeting is a promising therapeutic approach in cancer. 17-AAG is an HSP90 inhibitor with completed Phase I trials in patients with advanced cancer and recently published Phase II trials. The aim of this work was to study the expression of HSP 90 and apoptotic proteins, the effects in culture of 17-AAG on cell survival and apoptosis and to compare Philadelphia-positive (Ph+) ALL to common B cell ALL, in ALL cell lines and in patients’ cells collected at ALL diagnosis. Methods We analysed 2 ALL cell lines and 63 leukaemic samples from patients treated in our institution (44 common B cell ALL and 19 Ph+ ALL). We performed flow cytometry analysis of bone marrow aspiration and cell lines with a combination of anti-HSP90, Bax, Bcl-2 and Bcl-xl antibodies. Apoptosis after cell culture (in presence or not of 17-AAG) was assessed using Annexin V and activated caspase-3 staining. Results Ph+ ALL cells appeared to be more sensitive to 17-AAG cytotoxicity with a 100 % mortality rate after exposure to 10 μM for 24 h (vs. 62 % for B-common ALL). A high percentage of HSP90-positive cells (in Ph+ ALL samples) was associated with high sensitivity to 17-AAG. 17-AAG induced apoptosis in a dose-dependent manner and was associated with down-regulation of Bcl-2 and Bcl-Xl expression and up-regulation of Bax expression. Conclusion Considering that Bcr-Abl constitutes HSP 90 substrates, HSP 90 inhibition could be of particular interest for Ph+ ALL disease, even in patients harbouring resistance to tyrosine kinase inhibitor therapy. | ||
| 650 | 4 | |a Acute lymphoblastic leukaemia |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Apoptosis |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Bcr-Abl |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a HSP90 |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a New drugs for leukaemia |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Flandrin-Gresta, Pascale |e verfasserin |4 aut | |
| 700 | 1 | |a Solly, Françoise |e verfasserin |4 aut | |
| 700 | 1 | |a Rigollet, Lauren |e verfasserin |4 aut | |
| 700 | 1 | |a Cornillon, Jérôme |e verfasserin |4 aut | |
| 700 | 1 | |a Augeul-Meunier, Karine |e verfasserin |4 aut | |
| 700 | 1 | |a Stephan, Jean-Louis |e verfasserin |4 aut | |
| 700 | 1 | |a Montmartin, Aurélie |e verfasserin |4 aut | |
| 700 | 1 | |a Viallet, Annie |e verfasserin |4 aut | |
| 700 | 1 | |a Guyotat, Denis |e verfasserin |4 aut | |
| 700 | 1 | |a Campos, Lydia |e verfasserin |4 aut | |
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10.1007/s00432-012-1247-6 doi (DE-627)SPR005847885 (SPR)s00432-012-1247-6-e DE-627 ger DE-627 rakwb eng 610 ASE 44.81 bkl Tavernier, Emmanuelle verfasserin aut HSP90 inhibition results in apoptosis of Philadelphia acute lymphoblastic leukaemia cells: an attractive prospect of new targeted agents 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Purpose HSP90 targeting is a promising therapeutic approach in cancer. 17-AAG is an HSP90 inhibitor with completed Phase I trials in patients with advanced cancer and recently published Phase II trials. The aim of this work was to study the expression of HSP 90 and apoptotic proteins, the effects in culture of 17-AAG on cell survival and apoptosis and to compare Philadelphia-positive (Ph+) ALL to common B cell ALL, in ALL cell lines and in patients’ cells collected at ALL diagnosis. Methods We analysed 2 ALL cell lines and 63 leukaemic samples from patients treated in our institution (44 common B cell ALL and 19 Ph+ ALL). We performed flow cytometry analysis of bone marrow aspiration and cell lines with a combination of anti-HSP90, Bax, Bcl-2 and Bcl-xl antibodies. Apoptosis after cell culture (in presence or not of 17-AAG) was assessed using Annexin V and activated caspase-3 staining. Results Ph+ ALL cells appeared to be more sensitive to 17-AAG cytotoxicity with a 100 % mortality rate after exposure to 10 μM for 24 h (vs. 62 % for B-common ALL). A high percentage of HSP90-positive cells (in Ph+ ALL samples) was associated with high sensitivity to 17-AAG. 17-AAG induced apoptosis in a dose-dependent manner and was associated with down-regulation of Bcl-2 and Bcl-Xl expression and up-regulation of Bax expression. Conclusion Considering that Bcr-Abl constitutes HSP 90 substrates, HSP 90 inhibition could be of particular interest for Ph+ ALL disease, even in patients harbouring resistance to tyrosine kinase inhibitor therapy. Acute lymphoblastic leukaemia (dpeaa)DE-He213 Apoptosis (dpeaa)DE-He213 Bcr-Abl (dpeaa)DE-He213 HSP90 (dpeaa)DE-He213 New drugs for leukaemia (dpeaa)DE-He213 Flandrin-Gresta, Pascale verfasserin aut Solly, Françoise verfasserin aut Rigollet, Lauren verfasserin aut Cornillon, Jérôme verfasserin aut Augeul-Meunier, Karine verfasserin aut Stephan, Jean-Louis verfasserin aut Montmartin, Aurélie verfasserin aut Viallet, Annie verfasserin aut Guyotat, Denis verfasserin aut Campos, Lydia verfasserin aut Enthalten in Journal of cancer research and clinical oncology Berlin : Springer, 1904 138(2012), 10 vom: 17. Juni, Seite 1753-1758 (DE-627)253769515 (DE-600)1459285-X 1432-1335 nnns volume:138 year:2012 number:10 day:17 month:06 pages:1753-1758 https://dx.doi.org/10.1007/s00432-012-1247-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_165 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_711 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 44.81 ASE AR 138 2012 10 17 06 1753-1758 |
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10.1007/s00432-012-1247-6 doi (DE-627)SPR005847885 (SPR)s00432-012-1247-6-e DE-627 ger DE-627 rakwb eng 610 ASE 44.81 bkl Tavernier, Emmanuelle verfasserin aut HSP90 inhibition results in apoptosis of Philadelphia acute lymphoblastic leukaemia cells: an attractive prospect of new targeted agents 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Purpose HSP90 targeting is a promising therapeutic approach in cancer. 17-AAG is an HSP90 inhibitor with completed Phase I trials in patients with advanced cancer and recently published Phase II trials. The aim of this work was to study the expression of HSP 90 and apoptotic proteins, the effects in culture of 17-AAG on cell survival and apoptosis and to compare Philadelphia-positive (Ph+) ALL to common B cell ALL, in ALL cell lines and in patients’ cells collected at ALL diagnosis. Methods We analysed 2 ALL cell lines and 63 leukaemic samples from patients treated in our institution (44 common B cell ALL and 19 Ph+ ALL). We performed flow cytometry analysis of bone marrow aspiration and cell lines with a combination of anti-HSP90, Bax, Bcl-2 and Bcl-xl antibodies. Apoptosis after cell culture (in presence or not of 17-AAG) was assessed using Annexin V and activated caspase-3 staining. Results Ph+ ALL cells appeared to be more sensitive to 17-AAG cytotoxicity with a 100 % mortality rate after exposure to 10 μM for 24 h (vs. 62 % for B-common ALL). A high percentage of HSP90-positive cells (in Ph+ ALL samples) was associated with high sensitivity to 17-AAG. 17-AAG induced apoptosis in a dose-dependent manner and was associated with down-regulation of Bcl-2 and Bcl-Xl expression and up-regulation of Bax expression. Conclusion Considering that Bcr-Abl constitutes HSP 90 substrates, HSP 90 inhibition could be of particular interest for Ph+ ALL disease, even in patients harbouring resistance to tyrosine kinase inhibitor therapy. Acute lymphoblastic leukaemia (dpeaa)DE-He213 Apoptosis (dpeaa)DE-He213 Bcr-Abl (dpeaa)DE-He213 HSP90 (dpeaa)DE-He213 New drugs for leukaemia (dpeaa)DE-He213 Flandrin-Gresta, Pascale verfasserin aut Solly, Françoise verfasserin aut Rigollet, Lauren verfasserin aut Cornillon, Jérôme verfasserin aut Augeul-Meunier, Karine verfasserin aut Stephan, Jean-Louis verfasserin aut Montmartin, Aurélie verfasserin aut Viallet, Annie verfasserin aut Guyotat, Denis verfasserin aut Campos, Lydia verfasserin aut Enthalten in Journal of cancer research and clinical oncology Berlin : Springer, 1904 138(2012), 10 vom: 17. Juni, Seite 1753-1758 (DE-627)253769515 (DE-600)1459285-X 1432-1335 nnns volume:138 year:2012 number:10 day:17 month:06 pages:1753-1758 https://dx.doi.org/10.1007/s00432-012-1247-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_165 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_711 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 44.81 ASE AR 138 2012 10 17 06 1753-1758 |
| allfields_unstemmed |
10.1007/s00432-012-1247-6 doi (DE-627)SPR005847885 (SPR)s00432-012-1247-6-e DE-627 ger DE-627 rakwb eng 610 ASE 44.81 bkl Tavernier, Emmanuelle verfasserin aut HSP90 inhibition results in apoptosis of Philadelphia acute lymphoblastic leukaemia cells: an attractive prospect of new targeted agents 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Purpose HSP90 targeting is a promising therapeutic approach in cancer. 17-AAG is an HSP90 inhibitor with completed Phase I trials in patients with advanced cancer and recently published Phase II trials. The aim of this work was to study the expression of HSP 90 and apoptotic proteins, the effects in culture of 17-AAG on cell survival and apoptosis and to compare Philadelphia-positive (Ph+) ALL to common B cell ALL, in ALL cell lines and in patients’ cells collected at ALL diagnosis. Methods We analysed 2 ALL cell lines and 63 leukaemic samples from patients treated in our institution (44 common B cell ALL and 19 Ph+ ALL). We performed flow cytometry analysis of bone marrow aspiration and cell lines with a combination of anti-HSP90, Bax, Bcl-2 and Bcl-xl antibodies. Apoptosis after cell culture (in presence or not of 17-AAG) was assessed using Annexin V and activated caspase-3 staining. Results Ph+ ALL cells appeared to be more sensitive to 17-AAG cytotoxicity with a 100 % mortality rate after exposure to 10 μM for 24 h (vs. 62 % for B-common ALL). A high percentage of HSP90-positive cells (in Ph+ ALL samples) was associated with high sensitivity to 17-AAG. 17-AAG induced apoptosis in a dose-dependent manner and was associated with down-regulation of Bcl-2 and Bcl-Xl expression and up-regulation of Bax expression. Conclusion Considering that Bcr-Abl constitutes HSP 90 substrates, HSP 90 inhibition could be of particular interest for Ph+ ALL disease, even in patients harbouring resistance to tyrosine kinase inhibitor therapy. Acute lymphoblastic leukaemia (dpeaa)DE-He213 Apoptosis (dpeaa)DE-He213 Bcr-Abl (dpeaa)DE-He213 HSP90 (dpeaa)DE-He213 New drugs for leukaemia (dpeaa)DE-He213 Flandrin-Gresta, Pascale verfasserin aut Solly, Françoise verfasserin aut Rigollet, Lauren verfasserin aut Cornillon, Jérôme verfasserin aut Augeul-Meunier, Karine verfasserin aut Stephan, Jean-Louis verfasserin aut Montmartin, Aurélie verfasserin aut Viallet, Annie verfasserin aut Guyotat, Denis verfasserin aut Campos, Lydia verfasserin aut Enthalten in Journal of cancer research and clinical oncology Berlin : Springer, 1904 138(2012), 10 vom: 17. Juni, Seite 1753-1758 (DE-627)253769515 (DE-600)1459285-X 1432-1335 nnns volume:138 year:2012 number:10 day:17 month:06 pages:1753-1758 https://dx.doi.org/10.1007/s00432-012-1247-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_165 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_711 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 44.81 ASE AR 138 2012 10 17 06 1753-1758 |
| allfieldsGer |
10.1007/s00432-012-1247-6 doi (DE-627)SPR005847885 (SPR)s00432-012-1247-6-e DE-627 ger DE-627 rakwb eng 610 ASE 44.81 bkl Tavernier, Emmanuelle verfasserin aut HSP90 inhibition results in apoptosis of Philadelphia acute lymphoblastic leukaemia cells: an attractive prospect of new targeted agents 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Purpose HSP90 targeting is a promising therapeutic approach in cancer. 17-AAG is an HSP90 inhibitor with completed Phase I trials in patients with advanced cancer and recently published Phase II trials. The aim of this work was to study the expression of HSP 90 and apoptotic proteins, the effects in culture of 17-AAG on cell survival and apoptosis and to compare Philadelphia-positive (Ph+) ALL to common B cell ALL, in ALL cell lines and in patients’ cells collected at ALL diagnosis. Methods We analysed 2 ALL cell lines and 63 leukaemic samples from patients treated in our institution (44 common B cell ALL and 19 Ph+ ALL). We performed flow cytometry analysis of bone marrow aspiration and cell lines with a combination of anti-HSP90, Bax, Bcl-2 and Bcl-xl antibodies. Apoptosis after cell culture (in presence or not of 17-AAG) was assessed using Annexin V and activated caspase-3 staining. Results Ph+ ALL cells appeared to be more sensitive to 17-AAG cytotoxicity with a 100 % mortality rate after exposure to 10 μM for 24 h (vs. 62 % for B-common ALL). A high percentage of HSP90-positive cells (in Ph+ ALL samples) was associated with high sensitivity to 17-AAG. 17-AAG induced apoptosis in a dose-dependent manner and was associated with down-regulation of Bcl-2 and Bcl-Xl expression and up-regulation of Bax expression. Conclusion Considering that Bcr-Abl constitutes HSP 90 substrates, HSP 90 inhibition could be of particular interest for Ph+ ALL disease, even in patients harbouring resistance to tyrosine kinase inhibitor therapy. Acute lymphoblastic leukaemia (dpeaa)DE-He213 Apoptosis (dpeaa)DE-He213 Bcr-Abl (dpeaa)DE-He213 HSP90 (dpeaa)DE-He213 New drugs for leukaemia (dpeaa)DE-He213 Flandrin-Gresta, Pascale verfasserin aut Solly, Françoise verfasserin aut Rigollet, Lauren verfasserin aut Cornillon, Jérôme verfasserin aut Augeul-Meunier, Karine verfasserin aut Stephan, Jean-Louis verfasserin aut Montmartin, Aurélie verfasserin aut Viallet, Annie verfasserin aut Guyotat, Denis verfasserin aut Campos, Lydia verfasserin aut Enthalten in Journal of cancer research and clinical oncology Berlin : Springer, 1904 138(2012), 10 vom: 17. Juni, Seite 1753-1758 (DE-627)253769515 (DE-600)1459285-X 1432-1335 nnns volume:138 year:2012 number:10 day:17 month:06 pages:1753-1758 https://dx.doi.org/10.1007/s00432-012-1247-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_165 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_711 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 44.81 ASE AR 138 2012 10 17 06 1753-1758 |
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10.1007/s00432-012-1247-6 doi (DE-627)SPR005847885 (SPR)s00432-012-1247-6-e DE-627 ger DE-627 rakwb eng 610 ASE 44.81 bkl Tavernier, Emmanuelle verfasserin aut HSP90 inhibition results in apoptosis of Philadelphia acute lymphoblastic leukaemia cells: an attractive prospect of new targeted agents 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Purpose HSP90 targeting is a promising therapeutic approach in cancer. 17-AAG is an HSP90 inhibitor with completed Phase I trials in patients with advanced cancer and recently published Phase II trials. The aim of this work was to study the expression of HSP 90 and apoptotic proteins, the effects in culture of 17-AAG on cell survival and apoptosis and to compare Philadelphia-positive (Ph+) ALL to common B cell ALL, in ALL cell lines and in patients’ cells collected at ALL diagnosis. Methods We analysed 2 ALL cell lines and 63 leukaemic samples from patients treated in our institution (44 common B cell ALL and 19 Ph+ ALL). We performed flow cytometry analysis of bone marrow aspiration and cell lines with a combination of anti-HSP90, Bax, Bcl-2 and Bcl-xl antibodies. Apoptosis after cell culture (in presence or not of 17-AAG) was assessed using Annexin V and activated caspase-3 staining. Results Ph+ ALL cells appeared to be more sensitive to 17-AAG cytotoxicity with a 100 % mortality rate after exposure to 10 μM for 24 h (vs. 62 % for B-common ALL). A high percentage of HSP90-positive cells (in Ph+ ALL samples) was associated with high sensitivity to 17-AAG. 17-AAG induced apoptosis in a dose-dependent manner and was associated with down-regulation of Bcl-2 and Bcl-Xl expression and up-regulation of Bax expression. Conclusion Considering that Bcr-Abl constitutes HSP 90 substrates, HSP 90 inhibition could be of particular interest for Ph+ ALL disease, even in patients harbouring resistance to tyrosine kinase inhibitor therapy. Acute lymphoblastic leukaemia (dpeaa)DE-He213 Apoptosis (dpeaa)DE-He213 Bcr-Abl (dpeaa)DE-He213 HSP90 (dpeaa)DE-He213 New drugs for leukaemia (dpeaa)DE-He213 Flandrin-Gresta, Pascale verfasserin aut Solly, Françoise verfasserin aut Rigollet, Lauren verfasserin aut Cornillon, Jérôme verfasserin aut Augeul-Meunier, Karine verfasserin aut Stephan, Jean-Louis verfasserin aut Montmartin, Aurélie verfasserin aut Viallet, Annie verfasserin aut Guyotat, Denis verfasserin aut Campos, Lydia verfasserin aut Enthalten in Journal of cancer research and clinical oncology Berlin : Springer, 1904 138(2012), 10 vom: 17. Juni, Seite 1753-1758 (DE-627)253769515 (DE-600)1459285-X 1432-1335 nnns volume:138 year:2012 number:10 day:17 month:06 pages:1753-1758 https://dx.doi.org/10.1007/s00432-012-1247-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_165 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_711 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 44.81 ASE AR 138 2012 10 17 06 1753-1758 |
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Enthalten in Journal of cancer research and clinical oncology 138(2012), 10 vom: 17. Juni, Seite 1753-1758 volume:138 year:2012 number:10 day:17 month:06 pages:1753-1758 |
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Acute lymphoblastic leukaemia Apoptosis Bcr-Abl HSP90 New drugs for leukaemia |
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Tavernier, Emmanuelle @@aut@@ Flandrin-Gresta, Pascale @@aut@@ Solly, Françoise @@aut@@ Rigollet, Lauren @@aut@@ Cornillon, Jérôme @@aut@@ Augeul-Meunier, Karine @@aut@@ Stephan, Jean-Louis @@aut@@ Montmartin, Aurélie @@aut@@ Viallet, Annie @@aut@@ Guyotat, Denis @@aut@@ Campos, Lydia @@aut@@ |
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2012-06-17T00:00:00Z |
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Tavernier, Emmanuelle |
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Tavernier, Emmanuelle ddc 610 bkl 44.81 misc Acute lymphoblastic leukaemia misc Apoptosis misc Bcr-Abl misc HSP90 misc New drugs for leukaemia HSP90 inhibition results in apoptosis of Philadelphia acute lymphoblastic leukaemia cells: an attractive prospect of new targeted agents |
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Tavernier, Emmanuelle |
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610 ASE 44.81 bkl HSP90 inhibition results in apoptosis of Philadelphia acute lymphoblastic leukaemia cells: an attractive prospect of new targeted agents Acute lymphoblastic leukaemia (dpeaa)DE-He213 Apoptosis (dpeaa)DE-He213 Bcr-Abl (dpeaa)DE-He213 HSP90 (dpeaa)DE-He213 New drugs for leukaemia (dpeaa)DE-He213 |
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ddc 610 bkl 44.81 misc Acute lymphoblastic leukaemia misc Apoptosis misc Bcr-Abl misc HSP90 misc New drugs for leukaemia |
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ddc 610 bkl 44.81 misc Acute lymphoblastic leukaemia misc Apoptosis misc Bcr-Abl misc HSP90 misc New drugs for leukaemia |
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ddc 610 bkl 44.81 misc Acute lymphoblastic leukaemia misc Apoptosis misc Bcr-Abl misc HSP90 misc New drugs for leukaemia |
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Journal of cancer research and clinical oncology |
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Journal of cancer research and clinical oncology |
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HSP90 inhibition results in apoptosis of Philadelphia acute lymphoblastic leukaemia cells: an attractive prospect of new targeted agents |
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HSP90 inhibition results in apoptosis of Philadelphia acute lymphoblastic leukaemia cells: an attractive prospect of new targeted agents |
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Tavernier, Emmanuelle |
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Journal of cancer research and clinical oncology |
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Journal of cancer research and clinical oncology |
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600 - Technology |
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2012 |
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Tavernier, Emmanuelle Flandrin-Gresta, Pascale Solly, Françoise Rigollet, Lauren Cornillon, Jérôme Augeul-Meunier, Karine Stephan, Jean-Louis Montmartin, Aurélie Viallet, Annie Guyotat, Denis Campos, Lydia |
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Tavernier, Emmanuelle |
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10.1007/s00432-012-1247-6 |
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610 |
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hsp90 inhibition results in apoptosis of philadelphia acute lymphoblastic leukaemia cells: an attractive prospect of new targeted agents |
| title_auth |
HSP90 inhibition results in apoptosis of Philadelphia acute lymphoblastic leukaemia cells: an attractive prospect of new targeted agents |
| abstract |
Purpose HSP90 targeting is a promising therapeutic approach in cancer. 17-AAG is an HSP90 inhibitor with completed Phase I trials in patients with advanced cancer and recently published Phase II trials. The aim of this work was to study the expression of HSP 90 and apoptotic proteins, the effects in culture of 17-AAG on cell survival and apoptosis and to compare Philadelphia-positive (Ph+) ALL to common B cell ALL, in ALL cell lines and in patients’ cells collected at ALL diagnosis. Methods We analysed 2 ALL cell lines and 63 leukaemic samples from patients treated in our institution (44 common B cell ALL and 19 Ph+ ALL). We performed flow cytometry analysis of bone marrow aspiration and cell lines with a combination of anti-HSP90, Bax, Bcl-2 and Bcl-xl antibodies. Apoptosis after cell culture (in presence or not of 17-AAG) was assessed using Annexin V and activated caspase-3 staining. Results Ph+ ALL cells appeared to be more sensitive to 17-AAG cytotoxicity with a 100 % mortality rate after exposure to 10 μM for 24 h (vs. 62 % for B-common ALL). A high percentage of HSP90-positive cells (in Ph+ ALL samples) was associated with high sensitivity to 17-AAG. 17-AAG induced apoptosis in a dose-dependent manner and was associated with down-regulation of Bcl-2 and Bcl-Xl expression and up-regulation of Bax expression. Conclusion Considering that Bcr-Abl constitutes HSP 90 substrates, HSP 90 inhibition could be of particular interest for Ph+ ALL disease, even in patients harbouring resistance to tyrosine kinase inhibitor therapy. |
| abstractGer |
Purpose HSP90 targeting is a promising therapeutic approach in cancer. 17-AAG is an HSP90 inhibitor with completed Phase I trials in patients with advanced cancer and recently published Phase II trials. The aim of this work was to study the expression of HSP 90 and apoptotic proteins, the effects in culture of 17-AAG on cell survival and apoptosis and to compare Philadelphia-positive (Ph+) ALL to common B cell ALL, in ALL cell lines and in patients’ cells collected at ALL diagnosis. Methods We analysed 2 ALL cell lines and 63 leukaemic samples from patients treated in our institution (44 common B cell ALL and 19 Ph+ ALL). We performed flow cytometry analysis of bone marrow aspiration and cell lines with a combination of anti-HSP90, Bax, Bcl-2 and Bcl-xl antibodies. Apoptosis after cell culture (in presence or not of 17-AAG) was assessed using Annexin V and activated caspase-3 staining. Results Ph+ ALL cells appeared to be more sensitive to 17-AAG cytotoxicity with a 100 % mortality rate after exposure to 10 μM for 24 h (vs. 62 % for B-common ALL). A high percentage of HSP90-positive cells (in Ph+ ALL samples) was associated with high sensitivity to 17-AAG. 17-AAG induced apoptosis in a dose-dependent manner and was associated with down-regulation of Bcl-2 and Bcl-Xl expression and up-regulation of Bax expression. Conclusion Considering that Bcr-Abl constitutes HSP 90 substrates, HSP 90 inhibition could be of particular interest for Ph+ ALL disease, even in patients harbouring resistance to tyrosine kinase inhibitor therapy. |
| abstract_unstemmed |
Purpose HSP90 targeting is a promising therapeutic approach in cancer. 17-AAG is an HSP90 inhibitor with completed Phase I trials in patients with advanced cancer and recently published Phase II trials. The aim of this work was to study the expression of HSP 90 and apoptotic proteins, the effects in culture of 17-AAG on cell survival and apoptosis and to compare Philadelphia-positive (Ph+) ALL to common B cell ALL, in ALL cell lines and in patients’ cells collected at ALL diagnosis. Methods We analysed 2 ALL cell lines and 63 leukaemic samples from patients treated in our institution (44 common B cell ALL and 19 Ph+ ALL). We performed flow cytometry analysis of bone marrow aspiration and cell lines with a combination of anti-HSP90, Bax, Bcl-2 and Bcl-xl antibodies. Apoptosis after cell culture (in presence or not of 17-AAG) was assessed using Annexin V and activated caspase-3 staining. Results Ph+ ALL cells appeared to be more sensitive to 17-AAG cytotoxicity with a 100 % mortality rate after exposure to 10 μM for 24 h (vs. 62 % for B-common ALL). A high percentage of HSP90-positive cells (in Ph+ ALL samples) was associated with high sensitivity to 17-AAG. 17-AAG induced apoptosis in a dose-dependent manner and was associated with down-regulation of Bcl-2 and Bcl-Xl expression and up-regulation of Bax expression. Conclusion Considering that Bcr-Abl constitutes HSP 90 substrates, HSP 90 inhibition could be of particular interest for Ph+ ALL disease, even in patients harbouring resistance to tyrosine kinase inhibitor therapy. |
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HSP90 inhibition results in apoptosis of Philadelphia acute lymphoblastic leukaemia cells: an attractive prospect of new targeted agents |
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Flandrin-Gresta, Pascale Solly, Françoise Rigollet, Lauren Cornillon, Jérôme Augeul-Meunier, Karine Stephan, Jean-Louis Montmartin, Aurélie Viallet, Annie Guyotat, Denis Campos, Lydia |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">SPR005847885</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230519183558.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">201002s2012 xx |||||o 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1007/s00432-012-1247-6</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)SPR005847885</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(SPR)s00432-012-1247-6-e</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">610</subfield><subfield code="q">ASE</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">44.81</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Tavernier, Emmanuelle</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">HSP90 inhibition results in apoptosis of Philadelphia acute lymphoblastic leukaemia cells: an attractive prospect of new targeted agents</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2012</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Purpose HSP90 targeting is a promising therapeutic approach in cancer. 17-AAG is an HSP90 inhibitor with completed Phase I trials in patients with advanced cancer and recently published Phase II trials. The aim of this work was to study the expression of HSP 90 and apoptotic proteins, the effects in culture of 17-AAG on cell survival and apoptosis and to compare Philadelphia-positive (Ph+) ALL to common B cell ALL, in ALL cell lines and in patients’ cells collected at ALL diagnosis. Methods We analysed 2 ALL cell lines and 63 leukaemic samples from patients treated in our institution (44 common B cell ALL and 19 Ph+ ALL). We performed flow cytometry analysis of bone marrow aspiration and cell lines with a combination of anti-HSP90, Bax, Bcl-2 and Bcl-xl antibodies. Apoptosis after cell culture (in presence or not of 17-AAG) was assessed using Annexin V and activated caspase-3 staining. Results Ph+ ALL cells appeared to be more sensitive to 17-AAG cytotoxicity with a 100 % mortality rate after exposure to 10 μM for 24 h (vs. 62 % for B-common ALL). A high percentage of HSP90-positive cells (in Ph+ ALL samples) was associated with high sensitivity to 17-AAG. 17-AAG induced apoptosis in a dose-dependent manner and was associated with down-regulation of Bcl-2 and Bcl-Xl expression and up-regulation of Bax expression. 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