AUTHOR=Di Iorio P. , Beggiato S. , Ronci M. , Nedel C. B. , Tasca C. I. , Zuccarini M. TITLE=Unfolding New Roles for Guanine-Based Purines and Their Metabolizing Enzymes in Cancer and Aging Disorders JOURNAL=Frontiers in Pharmacology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2021.653549 DOI=10.3389/fphar.2021.653549 ISSN=1663-9812