Could phthalates exposure contribute to the development of metabolic syndrome and liver disease in humans?

Environ Sci Pollut Res Int. 2020 Jan;27(1):772-784. doi: 10.1007/s11356-019-06831-2. Epub 2019 Dec 6.

Abstract

In the study, 305 patients of both genders were enrolled and divided into three groups: obese (BMI > 30 kg/m2), patients who were diagnosed type 2 diabetes mellitus (T2DM), and control, normal weight healthy volunteers. At least one of ten different phthalate metabolites was determined in the urine samples of 49.84% all enrolled participants. In the obese subgroup, the sum of all urinary phthalate metabolites was positively associated with TG levels (p = 0.031) together with derived TC/HDL and TG/HDL ratios (p = 0.023 and 0.015), respectively. Urinary MEP concentration was positively correlated with the HOMA-IR in T2DM subgroup (p = 0.016) while in the control subgroup, log10MEP levels were negatively correlated with total cholesterol (p = 0.0051), and LDL serum levels (p = 0.0015), respectively. Also, in the control subgroup, positive linear correlations between urinary log10MEP levels and TyG and TYG-BMI values (p = 0.028 and p = 0.027), respectively, were determined. Urinary MEHP levels were associated with glucose serum levels (p = 0.02) in T2DM subgroup, while in the control HDL values were negatively associated with log10MEHP (p = 0.0035). Healthy volunteers exposed to phthalates had elevated AST levels in comparison to non-exposed ones (p = 0.023). In control subgroup, ALT and AST values were increased (p = 0.02 and p = 0.01, respectively) in MEP exposed while GGT levels were enhanced (p = 0.017) in MEHP exposed in comparison with non-exposed. Combined phthalates influence on glucose and lipid metabolism may increase the possibility for NAFLD and insulin resistance development among exposed individuals.

Keywords: Endocrine disruptor chemicals; Glucose metabolism; Lipid metabolism; NAFLD; Phthalates.

MeSH terms

  • Adult
  • Diabetes Mellitus, Type 2 / metabolism
  • Environmental Exposure / statistics & numerical data*
  • Environmental Pollutants
  • Female
  • Glucose
  • Humans
  • Insulin Resistance
  • Lipid Metabolism
  • Liver Diseases / epidemiology*
  • Male
  • Metabolic Syndrome / epidemiology*
  • Middle Aged
  • Obesity / urine
  • Phthalic Acids*

Substances

  • Environmental Pollutants
  • Phthalic Acids
  • phthalic acid
  • Glucose