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Environ Res. 2014 Aug;133:170-7. doi: 10.1016/j.envres.2014.05.026. Epub 2014 Jun 18.

Persistent organic pollutant levels in human visceral and subcutaneous adipose tissue in obese individuals--depot differences and dysmetabolism implications.

Author information

1
Department of Biochemistry (U38-FCT), Faculty of Medicine, University of Porto, Centro de Investigação Médica, P-4200-450 Porto, Portugal; CINTESIS-Center for Research in Health Technologies and Information Systems, P-4200-450 Porto, Portugal. Electronic address: diogopestana@gmail.com.
2
General Surgery Department, S. João Hospital, Faculty of Medicine, University of Porto, P-4200-450 Porto, Portugal.
3
Department of Biochemistry (U38-FCT), Faculty of Medicine, University of Porto, Centro de Investigação Médica, P-4200-450 Porto, Portugal.
4
Chemistry Investigation Centre (CIQ), Department of Chemistry, Faculty of Sciences, University of Porto, P-4169-007 Porto, Portugal; Requimte-Instituto Superior de Engenharia, Instituto Politécnico do Porto, P-4200-072 Porto, Portugal.
5
Department of Biochemistry (U38-FCT), Faculty of Medicine, University of Porto, Centro de Investigação Médica, P-4200-450 Porto, Portugal; Chemistry Investigation Centre (CIQ), Department of Chemistry, Faculty of Sciences, University of Porto, P-4169-007 Porto, Portugal; Faculty of Nutrition and Food Sciences, University of Porto, P-4200-465 Porto, Portugal.
6
Chemistry Investigation Centre (CIQ), Department of Chemistry, Faculty of Sciences, University of Porto, P-4169-007 Porto, Portugal.
7
Department of Biochemistry (U38-FCT), Faculty of Medicine, University of Porto, Centro de Investigação Médica, P-4200-450 Porto, Portugal; Department of Clinical Pathology, Hospital S. João, P-4200-450 Porto, Portugal.
8
Department of Hygiene and Epidemiology, Faculty of Medicine and Institute of Public Health, University of Porto, P-4200-450 Porto, Portugal.
9
Requimte-Instituto Superior de Engenharia, Instituto Politécnico do Porto, P-4200-072 Porto, Portugal.
10
Department of Biochemistry (U38-FCT), Faculty of Medicine, University of Porto, Centro de Investigação Médica, P-4200-450 Porto, Portugal; CINTESIS-Center for Research in Health Technologies and Information Systems, P-4200-450 Porto, Portugal.

Abstract

BACKGROUND:

The role of persistent organic pollutants (POPs) with endocrine disrupting activity in the aetiology of obesity and other metabolic dysfunctions has been recently highlighted. Adipose tissue (AT) is a common site of POPs accumulation where they can induce adverse effects on human health.

OBJECTIVES:

To evaluate the presence of POPs in human visceral (vAT) and subcutaneous (scAT) adipose tissue in a sample of Portuguese obese patients that underwent bariatric surgery, and assess their putative association with metabolic disruption preoperatively, as well as with subsequent body mass index (BMI) reduction.

METHODS:

AT samples (n=189) from obese patients (BMI ≥ 35) were collected and the levels of 13 POPs were determined by gas chromatography with electron-capture detection (GC-ECD). Anthropometric and biochemical data were collected at the time of surgery. BMI variation was evaluated after 12 months and adipocyte size was measured in AT samples.

RESULTS:

Our data confirm that POPs are pervasive in this obese population (96.3% of detection on both tissues), their abundance increasing with age (RS=0.310, p<0.01) and duration of obesity (RS=0.170, p<0.05). We observed a difference in AT depot POPs storage capability, with higher levels of ΣPOPs in vAT (213.9 ± 204.2 compared to 155.1 ± 147.4 ng/g of fat, p<0.001), extremely relevant when evaluating their metabolic impact. Furthermore, there was a positive correlation between POP levels and the presence of metabolic syndrome components, namely dysglycaemia and hypertension, and more importantly with cardiovascular risk (RS=0.277, p<0.01), with relevance for vAT (RS=0.315, p<0.01). Finally, we observed an interesting relation of higher POP levels with lower weight loss in older patients.

CONCLUSION:

Our sample of obese subjects allowed us to highlight the importance of POPs stored in AT on the development of metabolic dysfunction in a context of obesity, shifting the focus to their metabolic effects and not only for their recognition as environmental obesogens.

KEYWORDS:

Adipose tissue; Bariatric surgery; Metabolic syndrome; Obesity; Persistent organic pollutants

PMID:
24949816
DOI:
10.1016/j.envres.2014.05.026
[Indexed for MEDLINE]

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