Personalized and Precision Medicine Journal

Abstract The pathophysiology and molecular pathways of breast cancer (BC) are still unclear, but it appears that BC is caused by the interaction between genetic susceptibility and environmental factors. Epidemiology studies have shown the increase risk of BC through polycyclic aromatic hydrocarbons (PAH) exposure. Environmental carcinogens induce disease pathways by altering the expression of specific genes that may be a consequence of epigenetic modifications. In order to understand the effects of PAHs in the BC risk, the epigenetic pathway may consider as an important key and likely play a role in BC initiation. Novel epigenetic  biomarkers and treatments hold promise  in the approch of personalized medicine. Here, we focus to review the epigenetic factors in relation to polycyclic aromatic hydrocarbons exposure that may influence BC risk.

Abstract Severe Acute Respiratory Syndrome
Coronavirus 2 (SARS-CoV-2), is a severe infection with respiratory and systemic
manifestations. This infectious disease has a complex course and manifests itself with
various clinical presentations, ranging from asymptomatic infection to a severe clinical
course. These variations in severity have raised the question of whether the genetic or
epigenetic variations have a role in COVID-19 susceptibility or severity, and that these
factors can be used to predict the disease course. A whole-genome sequencing performed
on 95 samples of SARS-CoV-2 identified 116 unique mutations, most of which were
missense and synonymous. Moreover, some studies have reported a relationship between
the COVID-19 severity and the genes ACE and TMPRSS2. The present review provides
an overview of different genes that have been found to be implicated or related to the
susceptibility to COVID-19 or its severity.