Clinically-Relevant Rapamycin Treatment Regimens Enhance CD8+ Effector Memory T Cell Function In The Skin and Allow their Infiltration into Cutaneous Squamous Cell Carcinoma
Patients receiving immunosuppressive drugs to prevent organ transplant rejection exhibit a greatly increased risk of developing cutaneous squamous cell carcinoma (SCC). However, not all immunosuppressive drugs confer the same risk. Randomised, controlled trials demonstrate that switching renal trans...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2018-09-01
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| Series: | OncoImmunology |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/2162402X.2018.1479627 |
| _version_ | 1818191123725680640 |
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| author | Ji-Won Jung Margaret Veitch Jennifer A. Bridge Nana H. Overgaard Jazmina L. Cruz Richard Linedale Michael E. Franklin Nicholas A. Saunders Fiona Simpson Ian H. Frazer Raymond J. Steptoe James W. Wells |
| author_facet | Ji-Won Jung Margaret Veitch Jennifer A. Bridge Nana H. Overgaard Jazmina L. Cruz Richard Linedale Michael E. Franklin Nicholas A. Saunders Fiona Simpson Ian H. Frazer Raymond J. Steptoe James W. Wells |
| author_sort | Ji-Won Jung |
| collection | DOAJ |
| description | Patients receiving immunosuppressive drugs to prevent organ transplant rejection exhibit a greatly increased risk of developing cutaneous squamous cell carcinoma (SCC). However, not all immunosuppressive drugs confer the same risk. Randomised, controlled trials demonstrate that switching renal transplant recipients receiving calcineurin inhibitor-based therapies to mammalian target of rapamycin (mTOR) inhibitors results in a reduced incidence of de novo SSC formation, and can even result in the regression of pre-existing premalignant lesions. However, the contribution played by residual immune function in this setting is unclear. We examined the hypotheses that mTOR inhibitors promote the enhanced differentiation and function of CD8+ memory T cells in the skin. Here, we demonstrate that the long-term oral administration of rapamycin to achieve clinically-relevant whole blood drug target thresholds, creates a “low rapamycin dose” environment in the skin. While both rapamycin and the calcineurin inhibitor tacrolimus elongated the survival of OVA-expressing skin grafts, and inhibited short-term antigen-specific CD8+ T cell responses, rapamycin but not tacrolimus permitted the statistically significant infiltration of CD8+ effector memory T cells into UV-induced SCC lesions. Furthermore, rapamycin uniquely enhanced the number and function of CD8+ effector and central memory T cells in a model of long-term contact hypersensitivity provided that rapamycin was present during the antigen sensitization phase. Thus, our findings suggest that patients switched to mTOR inhibitor regimens likely experience enhanced CD8+ memory T cell function to new antigen-challenges in their skin, which could contribute to their lower risk of de novo SSC formation and regression of pre-existing premalignant lesions. |
| first_indexed | 2024-12-12T00:09:36Z |
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| id | doaj.art-a807a6076b374885b14154d586abfc87 |
| institution | Directory Open Access Journal |
| issn | 2162-402X |
| language | English |
| last_indexed | 2024-12-12T00:09:36Z |
| publishDate | 2018-09-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | OncoImmunology |
| spelling | doaj.art-a807a6076b374885b14154d586abfc872022-12-22T00:45:00ZengTaylor & Francis GroupOncoImmunology2162-402X2018-09-017910.1080/2162402X.2018.14796271479627Clinically-Relevant Rapamycin Treatment Regimens Enhance CD8+ Effector Memory T Cell Function In The Skin and Allow their Infiltration into Cutaneous Squamous Cell CarcinomaJi-Won Jung0Margaret Veitch1Jennifer A. Bridge2Nana H. Overgaard3Jazmina L. Cruz4Richard Linedale5Michael E. Franklin6Nicholas A. Saunders7Fiona Simpson8Ian H. Frazer9Raymond J. Steptoe10James W. Wells11Translational Research InstituteTranslational Research InstituteTranslational Research InstituteTranslational Research InstituteTranslational Research InstituteTranslational Research InstitutePrincess Alexandra Hospital, Queensland HealthTranslational Research InstituteTranslational Research InstituteTranslational Research InstituteTranslational Research InstituteTranslational Research InstitutePatients receiving immunosuppressive drugs to prevent organ transplant rejection exhibit a greatly increased risk of developing cutaneous squamous cell carcinoma (SCC). However, not all immunosuppressive drugs confer the same risk. Randomised, controlled trials demonstrate that switching renal transplant recipients receiving calcineurin inhibitor-based therapies to mammalian target of rapamycin (mTOR) inhibitors results in a reduced incidence of de novo SSC formation, and can even result in the regression of pre-existing premalignant lesions. However, the contribution played by residual immune function in this setting is unclear. We examined the hypotheses that mTOR inhibitors promote the enhanced differentiation and function of CD8+ memory T cells in the skin. Here, we demonstrate that the long-term oral administration of rapamycin to achieve clinically-relevant whole blood drug target thresholds, creates a “low rapamycin dose” environment in the skin. While both rapamycin and the calcineurin inhibitor tacrolimus elongated the survival of OVA-expressing skin grafts, and inhibited short-term antigen-specific CD8+ T cell responses, rapamycin but not tacrolimus permitted the statistically significant infiltration of CD8+ effector memory T cells into UV-induced SCC lesions. Furthermore, rapamycin uniquely enhanced the number and function of CD8+ effector and central memory T cells in a model of long-term contact hypersensitivity provided that rapamycin was present during the antigen sensitization phase. Thus, our findings suggest that patients switched to mTOR inhibitor regimens likely experience enhanced CD8+ memory T cell function to new antigen-challenges in their skin, which could contribute to their lower risk of de novo SSC formation and regression of pre-existing premalignant lesions.http://dx.doi.org/10.1080/2162402X.2018.1479627t cellsmemoryskintransplantation |
| spellingShingle | Ji-Won Jung Margaret Veitch Jennifer A. Bridge Nana H. Overgaard Jazmina L. Cruz Richard Linedale Michael E. Franklin Nicholas A. Saunders Fiona Simpson Ian H. Frazer Raymond J. Steptoe James W. Wells Clinically-Relevant Rapamycin Treatment Regimens Enhance CD8+ Effector Memory T Cell Function In The Skin and Allow their Infiltration into Cutaneous Squamous Cell Carcinoma OncoImmunology t cells memory skin transplantation |
| title | Clinically-Relevant Rapamycin Treatment Regimens Enhance CD8+ Effector Memory T Cell Function In The Skin and Allow their Infiltration into Cutaneous Squamous Cell Carcinoma |
| title_full | Clinically-Relevant Rapamycin Treatment Regimens Enhance CD8+ Effector Memory T Cell Function In The Skin and Allow their Infiltration into Cutaneous Squamous Cell Carcinoma |
| title_fullStr | Clinically-Relevant Rapamycin Treatment Regimens Enhance CD8+ Effector Memory T Cell Function In The Skin and Allow their Infiltration into Cutaneous Squamous Cell Carcinoma |
| title_full_unstemmed | Clinically-Relevant Rapamycin Treatment Regimens Enhance CD8+ Effector Memory T Cell Function In The Skin and Allow their Infiltration into Cutaneous Squamous Cell Carcinoma |
| title_short | Clinically-Relevant Rapamycin Treatment Regimens Enhance CD8+ Effector Memory T Cell Function In The Skin and Allow their Infiltration into Cutaneous Squamous Cell Carcinoma |
| title_sort | clinically relevant rapamycin treatment regimens enhance cd8 effector memory t cell function in the skin and allow their infiltration into cutaneous squamous cell carcinoma |
| topic | t cells memory skin transplantation |
| url | http://dx.doi.org/10.1080/2162402X.2018.1479627 |
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