Naiara Santana-Codina, Joseph D Mancias, Alec C Kimmelman
{"title":"The Role of Autophagy in Cancer.","authors":"Naiara Santana-Codina, Joseph D Mancias, Alec C Kimmelman","doi":"10.1146/annurev-cancerbio-041816-122338","DOIUrl":"https://doi.org/10.1146/annurev-cancerbio-041816-122338","url":null,"abstract":"Autophagy is a highly conserved and regulated process that targets proteins and damaged organelles for lysosomal degradation to maintain cell metabolism, genomic integrity, and cell survival. The role of autophagy in cancer is dynamic and depends, in part, on tumor type and stage. Although autophagy constrains tumor initiation in normal tissue, some tumors rely on autophagy for tumor promotion and maintenance. Studies in genetically engineered mouse models support the idea that autophagy can constrain tumor initiation by regulating DNA damage and oxidative stress. In established tumors, autophagy can also be required for tumor maintenance, allowing tumors to survive environmental stress and providing intermediates for cell metabolism. Autophagy can also be induced in response to chemotherapeutics, acting as a drug-resistance mechanism. Therefore, targeting autophagy is an attractive cancer therapeutic option currently undergoing validation in clinical trials.","PeriodicalId":54233,"journal":{"name":"Annual Review of Cancer Biology-Series","volume":"1 ","pages":"19-39"},"PeriodicalIF":7.7,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-cancerbio-041816-122338","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36989273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Devon M Fitzgerald, P J Hastings, Susan M Rosenberg
{"title":"Stress-Induced Mutagenesis: Implications in Cancer and Drug Resistance.","authors":"Devon M Fitzgerald, P J Hastings, Susan M Rosenberg","doi":"10.1146/annurev-cancerbio-050216-121919","DOIUrl":"10.1146/annurev-cancerbio-050216-121919","url":null,"abstract":"<p><p>Genomic instability underlies many cancers and generates genetic variation that drives cancer initiation, progression, and therapy resistance. In contrast with classical assumptions that mutations occur purely stochastically at constant, gradual rates, microbes, plants, flies, and human cancer cells possess mechanisms of mutagenesis that are upregulated by stress responses. These generate transient, genetic-diversity bursts that can propel evolution, specifically when cells are poorly adapted to their environments-that is, when stressed. We review molecular mechanisms of stress-response-dependent (stress-induced) mutagenesis that occur from bacteria to cancer, and are activated by starvation, drugs, hypoxia, and other stressors. We discuss mutagenic DNA break repair in <i>Escherichia coli</i> as a model for mechanisms in cancers. The temporal regulation of mutagenesis by stress responses and spatial restriction in genomes are common themes across the tree of life. Both can accelerate evolution, including the evolution of cancers. We discuss possible anti-evolvability drugs, aimed at targeting mutagenesis and other variation generators, that could be used to delay the evolution of cancer progression and therapy resistance.</p>","PeriodicalId":54233,"journal":{"name":"Annual Review of Cancer Biology-Series","volume":"1 ","pages":"119-140"},"PeriodicalIF":4.7,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5794033/pdf/nihms905152.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35793382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"p53: Multiple Facets of a Rubik's Cube.","authors":"Yun Zhang, Guillermina Lozano","doi":"10.1146/annurev-cancerbio-050216-121926","DOIUrl":"10.1146/annurev-cancerbio-050216-121926","url":null,"abstract":"<p><p>The p53 tumor suppressor has been studied for decades, and still there are many questions left unanswered. In this review, we first describe the current understanding of the wild-type p53 functions that determine cell survival or death, and regulation of the protein, with a particular focus on the negative regulators, the murine double minute family of proteins. We also summarize tissue-, stress-, and age-specific p53 activities and the potential underlying mechanisms. Among all <i>p53</i> gene alterations identified in human cancers, <i>p53</i> missense mutations predominate, suggesting an inherent biological advantage. Numerous gain-of-function activities of mutant p53 in different model systems and contexts have been identified. The emerging theme is that mutant p53, which retains a potent transcriptional activation domain, also retains the ability to modify gene transcription, albeit indirectly. Lastly, because mutant p53 stability is necessary for its gain of function, we summarize the mechanisms through which mutant p53 is specifically stabilized. A deeper understanding of the multiple pathways that impinge upon wild-type and mutant p53 activities and how these, in turn, regulate cell behavior will help identify vulnerabilities and therapeutic opportunities.</p>","PeriodicalId":54233,"journal":{"name":"Annual Review of Cancer Biology-Series","volume":"1 ","pages":"185-201"},"PeriodicalIF":4.7,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6374046/pdf/nihms-1010263.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36975271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}