Systematic review on gene-sun exposure interactions in skin cancer.

BACKGROUND: The risk of skin cancer is determined by environmental factors like ultraviolet radiation (UVR), personal habits like time spent outdoors and genetic factors. This review aimed to survey existing studies in gene-environment (GxE) interaction on skin cancer risk, and report on GxE effect estimates. METHODS: We searched Embase, Medline (Ovid) and Web of Science (Core Collection) and included only primary research that reported on GxE on the risk of the three most common types of skin cancer: basal cell carcinoma (BCC), squamous cell carcinoma (SCC) and melanoma. Quality assessment followed the Newcastle-Ottawa Scale. Meta-analysis was not possible because no two studies examined the same interaction. This review was registered on PROSPERO (CRD42021238064). RESULTS: In total 260 records were identified after exclusion of duplicates. Fifteen studies were included in the final synthesis-12 used candidate gene approach. We found some evidence of GxE interactions with sun exposure, notably, with MC1R, CAT and NOS1 genes in melanoma, HAL and IL23A in BCC and HAL and XRCC1 in SCC. CONCLUSION: Sun exposure seems to interact with genes involved in pigmentation, oxidative stress and immunosuppression, indicating that excessive UV exposure might exhaust oxidative defence and repair systems differentially, dependent on genetic make-up. Further research is warranted to better understand skin cancer epidemiology and develop sun exposure recommendations. A genome-wide approach is recommended as it might uncover unknown disease pathways dependent on UV radiation.

CHRONIC MULTIMORBIDITY OF LOW BACK PAIN OR OTHER CHRONIC BACK DISORDERS IN THE REPUBLIC OF CROATIA.

The aim was to assess the prevalence of chronic multimorbidity in patients with chronic low back pain or other chronic back disorders (BD). We analyzed data from the population-based cross-sectional European Health Interview Survey (EHIS) performed in the Republic of Croatia 2014-2015 by the Croatian Institute of Public Health. Outcome was the point-prevalence of chronic multimorbidity defined as having ≥2 chronic illnesses out of 14 contained in the EHIS questionnaire, after adjustment for ten sociodemographic, anthropometric and lifestyle confounders. Amoung fourteen targeted illnesses were asthma, allergies, hypertension, urinary incontinence, kidney diseases, coronary heart disease or angina pectoris, neck disorder, arthrosis, chronic obstructive pulmonary disease, diabetes mellitus, myocardial infarction, stroke, depression, and the common category "other". We analyzed data on 268 participants with BD and 511 without it. Participants with BD had a significantly higher relative risk of any chronic multimorbidity (RRadj=2.12; 95% CI 1.55, 2.99; p<0.001), as well as of non-musculoskeletal chronic multimorbidity (RRadj=2.29; 95% CI 1.70, 3.08; p=0.001) than participants without BD. All chronic comorbidities except for asthma and liver cirrhosis were significantly more prevalent in participants with BD than in participants without BD. In the population with BD, the participants with multimorbidity had three to four times higher odds for unfavorable self-reported health outcomes than the participants with no comorbid conditions, whereas the existence of only one comorbidity was not significantly associated with a worse outcome compared to the population with no comorbidities. In conclusion, the population suffering from BD has a higher prevalence of chronic multimorbidity than the population without BD and this multimorbidity is associated with unfavorable health outcomes.

MODERATING EFFECT OF BODY HEIGHT ON THE ASSOCIATION OF BODY WEIGHT AND DISABILITY CAUSED BY NON SPECIFIC CHRONIC LOW BACK PAIN IN WOMEN AND MEN.

The aim of the study was testing the hypothesis that body height has a moderating effect on the association of weight and chronic low back pain (LBP) induced disability, and that this moderating effect is different in women and men. We performed a nested cross-sectional analysis using data collected at baseline in a prospective cohort study conducted in 2008-2009 at a special hospital for medical rehabilitation in Croatia. The outcome was the Roland-Morris Disability Questionnaire (RMDQ) score. The independent variable was body weight. The focal moderators were body height and sex. The moderation analysis was adjusted for seven sociodemographic and clinical covariates. We analyzed data on 72 patients with a median (interquartile range) age of 50 (43-55) years, 36 (50%) of whom were women, treated for nonspecific, chronic LBP. The interaction of sex, body weight and height was a significant predictor of the RMDQ score after adjustments for all covariates (increase of R2=0.13; p=0.001; false discovery rate <5%). In both sexes, the correlation between body weight and the RMDQ score was significantly moderated by body height but in opposite ways. In conclusion, the effects of body weight on physical disability are moderated by body height, but this moderation effect differs between women and men.