Analysis of Somatic Mutations in Cancer Tissues Challenges the Somatic Mutation Theory of Cancer

Author(s):  
Daniel Satgé
2016 ◽  
Vol 38 (5) ◽  
pp. 1663-1680 ◽  
Author(s):  
Björn L.D.M. Brücher ◽  
Ijaz S. Jamall

Hysteron proteron reverses both temporal and logical order and this syllogism occurs in carcinogenesis and the somatic mutation theory (SMT): the first (somatic mutation) occurs only after the second (onset of cancer) and, therefore, observed somatic mutations in most cancers appear well after the early cues of carcinogenesis are in place. It is no accident that mutations are increasingly being questioned as the causal event in the origin of the vast majority of cancers as clinical data show little support for this theory when compared against the metrics of patient outcomes. Ever since the discovery of the double helical structure of DNA, virtually all chronic diseases came to be viewed as causally linked to one degree or another to mutations, even though we now know that genes are not simply blueprints, but rather an assemblage of alphabets that can, under non-genetic influences, be used to assemble a business letter or a work of Shakespearean literature. A minority of all cancers is indeed caused by mutations but the SMT has been applied to all cancers, and even to chemical carcinogenesis, in the absence of hard evidence of causality. Herein, we review the 100 year story of SMT and aspects that show why genes are not just blueprints, how radiation and mutation are associated in a more nuanced view, the proposed risk of cancer and bad luck, and the in vitro and in vivo evidence for a new cancer paradigm. This paradigm is scientifically applicable for the majority of non-heritable cancers and consists of a six-step sequence for the origin of cancer. This new cancer paradigm proclaims that somatic mutations are epiphenomena or later events occurring after carcinogenesis is already underway. This serves not just as a plausible alternative to SMT and explains the origin of the majority of cancers, but also provides opportunities for early interventions and prevention of the onset of cancer as a disease.


BioEssays ◽  
2013 ◽  
Vol 36 (1) ◽  
pp. 118-120 ◽  
Author(s):  
Ana M. Soto ◽  
Carlos Sonnenschein

2015 ◽  
Author(s):  
Björn LDM Brücher ◽  
Ijaz S Jamall

Background: The somatic mutation theory as the origin of cancer (carcinogenesis) was born some 100 years ago, when Theodor Boveri 1914 suggested that a combination of chromosomal defects may result in cancer. This was followed by Karl-Heinrich Bauer in 1928 suggesting that mutations could cause cancer. Subsequently, in 1953 Carl Nordling proposed that a number of mutated genes could cause cancer. Alfred Knudson in 1971 proposed that one hit (one mutation) would result in a clone of cancerous cells. This was modified to a 2-hit-theory later and it seems that cancer biology has continued to try to bolster the somatic mutation theory by recently suggesting that ‘driver’ and ‘passenger’ mutations were necessary and when this proved insufficient, others proposed the hyper-mutation theory in 2014. In the attempt to clothe the Emperor, it was forgotten that mutations found in advanced cancers are either late events or epiphenomena that occur after carcinogenesis (cancer development) and especially after the appearance of a pre-cancerous niche. Reality: Fewer than 10% of cancers are proven to be hereditary (i.e., causally related to germline mutations) and this ratio is even lower in cancers of the stomach (<1%), the colorectum (3-8%) and breast (8%). Infection-triggered cancers constitute some 15% of all cancers and the remaining about some 80% cancers are sporadic, meaning their cause is unknown. New cancer paradigm: Findings from the plant and animal kingdoms, molecular and clinical data over the last 250 years were critically reviewed and gave rise to a new cancer hypothesis containing a multi-step process of 6 sequences. These include, (1) a pathogenic biological or chemical stimulus is followed by (2) chronic inflammation, from which develops (3) fibrosis with associated changes in the cellular microenvironment. These remodeling changes result in a (4) pre-cancerous niche, which triggers the deployment of (5) a chronic stress escape strategy, and when this fails to resolve, (6) a transition of a normal cell to a cancer cell occurs. Consequences: This recently proposed cancer model explains the origins of the vast majority of cancers which are until now were referred to as ‘sporadic’ cancers. Furthermore, this theory points out the need to establish preventive measures long before a cancer becomes clinically apparent. The epistemology of the origin of cancer is reviewed and presented.


BioEssays ◽  
2004 ◽  
Vol 26 (10) ◽  
pp. 1097-1107 ◽  
Author(s):  
Ana M. Soto ◽  
Carlos Sonnenschein

BioEssays ◽  
2011 ◽  
Vol 33 (5) ◽  
pp. 313-314 ◽  
Author(s):  
David Thomas ◽  
Andrew Moore

Sign in / Sign up

Export Citation Format

Share Document