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. 2023 Sep 1;32(9):1265-1269.
doi: 10.1158/1055-9965.EPI-23-0453.

Genetic Susceptibility to Nonalcoholic Fatty Liver Disease and Risk for Pancreatic Cancer: Mendelian Randomization

Sontoria D King #  1 Swathi Veliginti #  2 Martijn C G J Brouwers  3   4 Zhewen Ren  3   4 Wei Zheng  5 Veronica W Setiawan  6 Lynne R Wilkens  7 Xiao-Ou Shu  5 Alan A Arslan  8 Laura E Beane Freeman  9 Paige M Bracci  10 Federico Canzian  11 Mengmeng Du  12 Steven J Gallinger  13   14 Graham G Giles  15   16   17 Phyllis J Goodman  18 Christopher A Haiman  6 Manolis Kogevinas  19 Charles Kooperberg  20 Loic LeMarchand  7   7 Rachel E Neale  21 Kala Visvanathan  22   23 Emily White  24 Demetrius Albanes  9 Gabriella Andreotti  9 Ana Babic  25 Sonja I Berndt  9 Lauren K Brais  25 Paul Brennan  26 Julie E Buring  27   28 Kari G Rabe  29 William R Bamlet  29 Stephen J Chanock  9 Charles S Fuchs  30   31   32 J Michael Gaziano  28   33 Edward L Giovannucci  27   34   35 Thilo Hackert  36 Manal M Hassan  37 Verena Katzke  38 Robert C Kurtz  39 I-Min Lee  27   28 Núria Malats  40 Neil Murphy  41 Ann L Oberg  29 Irene Orlow  12 Miquel Porta  42 Francisco X Real  43 Nathaniel Rothman  9 Howard D Sesso  27   28 Debra T Silverman  9 Ian M Thompson  44 Jean Wactawski-Wende  45 Xiaoliang Wang  24 Nicolas Wentzensen  9 Herbert Yu  7 Anne Zeleniuch-Jacquotte  46 Kai Yu  9 Brian M Wolpin  25 Eric J Duell  47 Donghui Li  37 Rayjean J Hung  48 Sandra Perdomo  26 Marjorie L McCullough  49 Neal D Freedman  9 Alpa V Patel  49 Ulrike Peters  20 Elio Riboli  27   28 Malin Sund  50 Anne Tjønneland  51 Jun Zhong  9 Stephen K Van Den Eeden  52   53 Peter Kraft  27 Harvey A Risch  54 Laufey T Amundadottir  9 Alison P Klein  22   23   55 Rachael Z Stolzenberg-Solomon  9 Samuel O Antwi  2   56
Affiliations

Genetic Susceptibility to Nonalcoholic Fatty Liver Disease and Risk for Pancreatic Cancer: Mendelian Randomization

Sontoria D King et al. Cancer Epidemiol Biomarkers Prev. .

Abstract

Background: There are conflicting data on whether nonalcoholic fatty liver disease (NAFLD) is associated with susceptibility to pancreatic cancer. Using Mendelian randomization (MR), we investigated the relationship between genetic predisposition to NAFLD and risk for pancreatic cancer.

Methods: Data from genome-wide association studies (GWAS) within the Pancreatic Cancer Cohort Consortium (PanScan; cases n = 5,090, controls n = 8,733) and the Pancreatic Cancer Case Control Consortium (PanC4; cases n = 4,163, controls n = 3,792) were analyzed. We used data on 68 genetic variants with four different MR methods [inverse variance weighting (IVW), MR-Egger, simple median, and penalized weighted median] separately to predict genetic heritability of NAFLD. We then assessed the relationship between each of the four MR methods and pancreatic cancer risk, using logistic regression to calculate ORs and 95% confidence intervals (CI), adjusting for PC risk factors, including obesity and diabetes.

Results: No association was found between genetically predicted NAFLD and pancreatic cancer risk in the PanScan or PanC4 samples [e.g., PanScan, IVW OR, 1.04; 95% confidence interval (CI), 0.88-1.22; MR-Egger OR, 0.89; 95% CI, 0.65-1.21; PanC4, IVW OR, 1.07; 95% CI, 0.90-1.27; MR-Egger OR, 0.93; 95% CI, 0.67-1.28]. None of the four MR methods indicated an association between genetically predicted NAFLD and pancreatic cancer risk in either sample.

Conclusions: Genetic predisposition to NAFLD is not associated with pancreatic cancer risk.

Impact: Given the close relationship between NAFLD and metabolic conditions, it is plausible that any association between NAFLD and pancreatic cancer might reflect host metabolic perturbations (e.g., obesity, diabetes, or metabolic syndrome) and does not necessarily reflect a causal relationship between NAFLD and pancreatic cancer.

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Conflict of interest statement

Conflict of Interest: The authors declare no potential conflicts of interest related to this work.

Figures

Figure 1:
Figure 1:. Results from Mendelian randomization analyses.
The first plot (A) shows results for the PanScan cohort derived from logistic regression analyses using four different instrumental variables (polymorphism sets) with four different Mendelian randomization methods to assess the relationship between genetic heritability of NAFLD and PC risk. The second plot (B) shows results for the PanC4 samples obtained from logistic regression analyses using four separate instrumental variables with four Mendelian randomization methods. Each of the logistic regression models adjusted for age, sex, the top five principal components of genetic ancestry, personal history of diabetes, and smoking history. Abbreviations: cALT, chronically elevated serum alanine aminotransferase; NAFLD, nonalcoholic fatty liver disease; PanC4, Pancreatic Cancer Case-Control Consortium; PanScan, Pancreatic Cancer Cohort Consortium; PC, pancreatic cancer; MR, Mendelian randomization; SNP, single nucleotide polymorphism.
Figure 2:
Figure 2:. Plot of genetically predicted NAFLD and risk for PC.
The first plot (A) shows results from the PanScan data (68 SNPs), and the second plot (B) shows results from the PanC4 data (67 SNPs). The following MR methods were used: inverse variance weighting (light blue line), MR Egger (deep blue line), penalized weighted median (dashed green line), and simple median (pink line). Abbreviations: NAFLD, nonalcoholic fatty liver disease; PanC4, Pancreatic Cancer Case-Control Consortium; PanScan, Pancreatic Cancer Cohort Consortium; MR, Mendelian randomization; SNP, single nucleotide polymorphism.

References

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