Thymic Stromal Lymphopoietin Interferes with the Apoptosis of Human Skin Mast Cells by a Dual Strategy Involving STAT5/Mcl-1 and JNK/Bcl-x<sub>L</sub>
Mast cells (MCs) play critical roles in allergic and inflammatory reactions and contribute to multiple pathologies in the skin, in which they show increased numbers, which frequently correlates with severity. It remains ill-defined how MC accumulation is established by the cutaneous microenvironment...
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| Format: | Article |
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MDPI AG
2019-08-01
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| Series: | Cells |
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| Online Access: | https://www.mdpi.com/2073-4409/8/8/829 |
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| author | Tarek Hazzan Jürgen Eberle Margitta Worm Magda Babina |
| author_facet | Tarek Hazzan Jürgen Eberle Margitta Worm Magda Babina |
| author_sort | Tarek Hazzan |
| collection | DOAJ |
| description | Mast cells (MCs) play critical roles in allergic and inflammatory reactions and contribute to multiple pathologies in the skin, in which they show increased numbers, which frequently correlates with severity. It remains ill-defined how MC accumulation is established by the cutaneous microenvironment, in part because research on human MCs rarely employs MCs matured in the tissue, and extrapolations from other MC subsets have limitations, considering the high level of MC heterogeneity. Thymic stromal lymphopoietin (TSLP)—released by epithelial cells, like keratinocytes, following disturbed homeostasis and inflammation—has attracted much attention, but its impact on skin MCs remains undefined, despite the vast expression of the TSLP receptor by these cells. Using several methods, each detecting a distinct component of the apoptotic process (membrane alterations, DNA degradation, and caspase-3 activity)<i>,</i> our study pinpoints TSLP as a novel survival factor of dermal MCs. TSLP confers apoptosis resistance via concomitant activation of the TSLP/ signal transducer and activator of transcription (STAT)-5 / myeloid cell leukemia (Mcl)-1 route and a newly uncovered TSLP/ c-Jun-N-terminal kinase (JNK)/ B-cell lymphoma (Bcl)-x<sub>L</sub> axis, as evidenced by RNA interference and pharmacological inhibition. Our findings highlight the potential contribution of TSLP to the MC supportive niche of the skin and, vice versa, highlight MCs as crucial responders to TSLP in the context of TSLP-driven disorders. |
| first_indexed | 2024-03-12T07:45:54Z |
| format | Article |
| id | doaj.art-80c9429c327745a792899eb2606bdbb1 |
| institution | Directory Open Access Journal |
| issn | 2073-4409 |
| language | English |
| last_indexed | 2024-03-12T07:45:54Z |
| publishDate | 2019-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Cells |
| spelling | doaj.art-80c9429c327745a792899eb2606bdbb12023-09-02T20:58:27ZengMDPI AGCells2073-44092019-08-018882910.3390/cells8080829cells8080829Thymic Stromal Lymphopoietin Interferes with the Apoptosis of Human Skin Mast Cells by a Dual Strategy Involving STAT5/Mcl-1 and JNK/Bcl-x<sub>L</sub>Tarek Hazzan0Jürgen Eberle1Margitta Worm2Magda Babina3Department of Dermatology, Venerology and Allergy, Charité—Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, GermanyDepartment of Dermatology, Venerology and Allergy, Charité—Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, GermanyDepartment of Dermatology, Venerology and Allergy, Charité—Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, GermanyDepartment of Dermatology, Venerology and Allergy, Charité—Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, GermanyMast cells (MCs) play critical roles in allergic and inflammatory reactions and contribute to multiple pathologies in the skin, in which they show increased numbers, which frequently correlates with severity. It remains ill-defined how MC accumulation is established by the cutaneous microenvironment, in part because research on human MCs rarely employs MCs matured in the tissue, and extrapolations from other MC subsets have limitations, considering the high level of MC heterogeneity. Thymic stromal lymphopoietin (TSLP)—released by epithelial cells, like keratinocytes, following disturbed homeostasis and inflammation—has attracted much attention, but its impact on skin MCs remains undefined, despite the vast expression of the TSLP receptor by these cells. Using several methods, each detecting a distinct component of the apoptotic process (membrane alterations, DNA degradation, and caspase-3 activity)<i>,</i> our study pinpoints TSLP as a novel survival factor of dermal MCs. TSLP confers apoptosis resistance via concomitant activation of the TSLP/ signal transducer and activator of transcription (STAT)-5 / myeloid cell leukemia (Mcl)-1 route and a newly uncovered TSLP/ c-Jun-N-terminal kinase (JNK)/ B-cell lymphoma (Bcl)-x<sub>L</sub> axis, as evidenced by RNA interference and pharmacological inhibition. Our findings highlight the potential contribution of TSLP to the MC supportive niche of the skin and, vice versa, highlight MCs as crucial responders to TSLP in the context of TSLP-driven disorders.https://www.mdpi.com/2073-4409/8/8/829mast cellsTSLPskinapoptosissurvivalSTAT5JNKMcl-1Bcl-x<sub>L</sub>RNA interference |
| spellingShingle | Tarek Hazzan Jürgen Eberle Margitta Worm Magda Babina Thymic Stromal Lymphopoietin Interferes with the Apoptosis of Human Skin Mast Cells by a Dual Strategy Involving STAT5/Mcl-1 and JNK/Bcl-x<sub>L</sub> Cells mast cells TSLP skin apoptosis survival STAT5 JNK Mcl-1 Bcl-x<sub>L</sub> RNA interference |
| title | Thymic Stromal Lymphopoietin Interferes with the Apoptosis of Human Skin Mast Cells by a Dual Strategy Involving STAT5/Mcl-1 and JNK/Bcl-x<sub>L</sub> |
| title_full | Thymic Stromal Lymphopoietin Interferes with the Apoptosis of Human Skin Mast Cells by a Dual Strategy Involving STAT5/Mcl-1 and JNK/Bcl-x<sub>L</sub> |
| title_fullStr | Thymic Stromal Lymphopoietin Interferes with the Apoptosis of Human Skin Mast Cells by a Dual Strategy Involving STAT5/Mcl-1 and JNK/Bcl-x<sub>L</sub> |
| title_full_unstemmed | Thymic Stromal Lymphopoietin Interferes with the Apoptosis of Human Skin Mast Cells by a Dual Strategy Involving STAT5/Mcl-1 and JNK/Bcl-x<sub>L</sub> |
| title_short | Thymic Stromal Lymphopoietin Interferes with the Apoptosis of Human Skin Mast Cells by a Dual Strategy Involving STAT5/Mcl-1 and JNK/Bcl-x<sub>L</sub> |
| title_sort | thymic stromal lymphopoietin interferes with the apoptosis of human skin mast cells by a dual strategy involving stat5 mcl 1 and jnk bcl x sub l sub |
| topic | mast cells TSLP skin apoptosis survival STAT5 JNK Mcl-1 Bcl-x<sub>L</sub> RNA interference |
| url | https://www.mdpi.com/2073-4409/8/8/829 |
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