Andrew T Meram1, Jie Chen2, Stavan Patel1, Dongsoo D Kim1, Brett Shirley1, Paul Covello1, Domenico Coppola3, Eric X Wei2, Ghali Ghali1, Christopher G Kevil2, Rodney E Shackelford4. 1. Head & Neck Oncologic/Microvascular Reconstructive Surgery Department of Oral & Maxillofacial/Head & Neck Surgery, Louisiana State University Health Sciences Center, Shreveport, LA, U.S.A. 2. Department of Pathology and Translational Pathobiology Louisiana State University Health Sciences Center, Shreveport, LA, U.S.A. 3. Department of Anatomic Pathology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, U.S.A. 4. Department of Pathology and Translational Pathobiology Louisiana State University Health Sciences Center, Shreveport, LA, U.S.A. rshack@lsuhsc.edu.
Abstract
BACKGROUND/AIM: Hydrogen sulfide (H2S) and the enzymes that synthesize it, cystathionine-b-synthase, cystathionine γ-lyase, and 3-mercaptopyruvate, are increased in different human malignancies. Due to its short half-life, H2S concentrations have not been directly measured in a human malignancy. Here we directly measured in vivo H2S levels within oral squamous cell carcinoma (OSCC). PATIENTS AND METHODS: Punch biopsies of OSCC and benign mucosae from 15 patients were analyzed by HPLC, western blotting, and tissue microarray analyses. RESULTS: H2S concentrations were significantly higher in OSCC compared to adjacent benign oral mucosae. Western blot and tissue microarray studies revealed significantly increased cystathionine-b-synthase, cystathionine γ-lyase, and 3-mercaptopyruvate, phopho-Stat3, mitoNEET, hTERT, and MAPK protein levels in OSCC. CONCLUSION: H2S concentrations and the enzymes that synthesize it are significantly increased in OSCC. Here, for the first time H2S concentrations within a living human malignancy were measured and compared to adjacent counterpart benign tissue. Copyright
BACKGROUND/AIM: Hydrogen sulfide (H2S) and the enzymes that synthesize it, cystathionine-b-synthase, cystathionine γ-lyase, and 3-mercaptopyruvate, are increased in different humanmalignancies. Due to its short half-life, H2S concentrations have not been directly measured in a humanmalignancy. Here we directly measured in vivo H2S levels within oral squamous cell carcinoma (OSCC). PATIENTS AND METHODS: Punch biopsies of OSCC and benign mucosae from 15 patients were analyzed by HPLC, western blotting, and tissue microarray analyses. RESULTS:H2S concentrations were significantly higher in OSCC compared to adjacent benign oral mucosae. Western blot and tissue microarray studies revealed significantly increased cystathionine-b-synthase, cystathionine γ-lyase, and 3-mercaptopyruvate, phopho-Stat3, mitoNEET, hTERT, and MAPK protein levels in OSCC. CONCLUSION:H2S concentrations and the enzymes that synthesize it are significantly increased in OSCC. Here, for the first time H2S concentrations within a living humanmalignancy were measured and compared to adjacent counterpart benign tissue. Copyright
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