PMID- 32919259 OWN - NLM STAT- MEDLINE DCOM- 20210204 LR - 20210204 IS - 1873-6750 (Electronic) IS - 0160-4120 (Linking) VI - 145 DP - 2020 Dec TI - Pre- and post-diagnostic blood profiles of perfluoroalkyl acids in type 2 diabetes mellitus cases and controls. PG - 106095 LID - S0160-4120(20)32050-X [pii] LID - 10.1016/j.envint.2020.106095 [doi] AB - BACKGROUND: Studies exploring the associations between perfluoroalkyl acids (PFAAs) and type 2 diabetes mellitus (T2DM) are rather limited and have reported conflicting results. All studies to date, including prospective ones, have relied on a single blood sample to study this association. Similarly, studies investigating how T2DM status may influence the longitudinal changes in PFAA concentrations have not been previously performed. As PFAA concentrations in humans have changed considerably over the last two decades, and as individuals diagnosed with T2DM usually undergo lifestyle changes that could influence these concentrations, a single blood sample may not necessarily reflect the life-time exposure to PFAA concentrations. Hence, repeated measurements from the same individuals will extend our understanding of how PFAAs are associated with T2DM. The present study, therefore, aimed to explore associations between pre- and post-diagnostic PFAA blood profiles and T2DM and assess factors associated with longitudinal changes in PFAAs in T2DM cases and controls. METHODS: Questionnaire data and blood samples from women participating in the Norwegian Women and Cancer study were used to conduct a nested case-control study among 46 T2DM cases matched to 85 non-diabetic controls. PFAAs were measured in blood samples collected prior to (2001/02) and after (2005/6) T2DM diagnosis. We investigated the association between PFAAs and incident and prevalent T2DM using conditional logistic regression. We assessed the longitudinal changes in PFAA concentrations within and between matched cases and controls using t-tests and linear regression models. RESULTS: We observed no significant associations between pre-diagnostic PFAA concentrations and T2DM incidence. Similar results were observed for the post-diagnostic PFAA concentrations and T2DM prevalence. Decrease over time in PFAA concentrations were observed for PFOA and summation operatorPFOS concentrations, whereas increase over time were observed for PFNA, PFDA and PFUnDA concentrations. Longitudinal trends in PFAA concentrations among T2DM cases were similar to the changes observed in controls. CONCLUSIONS: The study did not find evidence of association between PFAAs and incident or prevalent T2DM. The longitudinal changes in PFAAs concentrations were not influenced by T2DM status. CI - Copyright (c) 2020 The Authors. Published by Elsevier Ltd.. All rights reserved. FAU - Charles, Dolley AU - Charles D AD - Department of Community Medicine, Faculty of Health Sciences, UIT-The Arctic University of Norway, NO-9037 Tromso, Norway. Electronic address: dolley.charles@uit.no. FAU - Berg, Vivian AU - Berg V AD - Department of Medical Biology, Faculty of Health Sciences, UIT-The Arctic University of Norway, NO-9037 Tromso, Norway; Department of Laboratory Medicine, Division of Diagnostic Services, University Hospital of North-Norway, NO-9038 Tromso, Norway. FAU - Nost, Therese H AU - Nost TH AD - Department of Community Medicine, Faculty of Health Sciences, UIT-The Arctic University of Norway, NO-9037 Tromso, Norway. FAU - Huber, Sandra AU - Huber S AD - Department of Laboratory Medicine, Division of Diagnostic Services, University Hospital of North-Norway, NO-9038 Tromso, Norway. FAU - Sandanger, Torkjel M AU - Sandanger TM AD - Department of Community Medicine, Faculty of Health Sciences, UIT-The Arctic University of Norway, NO-9037 Tromso, Norway. FAU - Rylander, Charlotta AU - Rylander C AD - Department of Community Medicine, Faculty of Health Sciences, UIT-The Arctic University of Norway, NO-9037 Tromso, Norway. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20200909 PL - Netherlands TA - Environ Int JT - Environment international JID - 7807270 RN - 0 (Alkanesulfonic Acids) RN - 0 (Caprylates) RN - 0 (Fluorocarbons) SB - IM MH - *Alkanesulfonic Acids MH - Caprylates MH - Case-Control Studies MH - *Diabetes Mellitus, Type 2/diagnosis MH - Female MH - *Fluorocarbons MH - Humans MH - Prospective Studies OTO - NOTNLM OT - Longitudinal assessment OT - Perfluoroalkyl acids OT - Perfluoroalkyl substances OT - Pre- and post-diagnostic associations OT - Repeated measurements OT - Type 2 diabetes mellitus EDAT- 2020/09/13 06:00 MHDA- 2021/02/05 06:00 CRDT- 2020/09/12 20:15 PHST- 2020/05/09 00:00 [received] PHST- 2020/08/24 00:00 [revised] PHST- 2020/08/25 00:00 [accepted] PHST- 2020/09/13 06:00 [pubmed] PHST- 2021/02/05 06:00 [medline] PHST- 2020/09/12 20:15 [entrez] AID - S0160-4120(20)32050-X [pii] AID - 10.1016/j.envint.2020.106095 [doi] PST - ppublish SO - Environ Int. 2020 Dec;145:106095. doi: 10.1016/j.envint.2020.106095. Epub 2020 Sep 9.