Association between urinary concentration of phthalate metabolites and impaired renal function in Shanghai adults

Environ Pollut. 2019 Feb:245:149-162. doi: 10.1016/j.envpol.2018.10.044. Epub 2018 Nov 2.

Abstract

Background: Exposure to phthalates is reported to be associated with increased incidence of microalbuminuria and low-grade albuminuria in children and adolescents. However, this phenomenon of phthalate-related nephrotoxicity is unknown in adults.

Methods: Urine samples of 1663 adults from the 2012 Shanghai Food Consumption Survey (SHFCS) were measured for 10 metabolites of 6 phthalates and for renal function parameters. Their associations were explored by linear and logistic regression models.

Results: Multivariate linear regression analysis showed that all three renal function parameters (albumin-to-creatinine ratio (ACR), β2-microglobulin (B2M), and N-acetyl-β-d-glucosaminidase (NAG)) are positively associated with six metabolites, including mono-benzylphthalate (MBzP), mono-2-ethylhexylphthalate (MEHP), mono-2-ethyl-5-oxohexyphthalate (MEOHP), mono-2-ethyl-5-hydroxyhexylphthalate (MEHHP), mono-2-ethyl-5-carboxypentylphthalate (MECPP), and mono-2-carboxymethyl-hexyl phthalate (MCMHP) (P < 0.05). Logistic analysis showed that the prevalence of hyperALBuria, hyperB2Muria, hyperNAGuria, or potentially impaired renal function (PIRF) were positively associated with urinary levels of MBzP, MEOHP, and MECPP, respectively (P < 0.05). Co-exposure to identified risk metabolites monoethylphthalate (MEP), MBzP, MEHP, MEOHP, MECPP, MEHHP, and MCMHP increased the risk of having impaired renal function.

Conclusion: Certain metabolites of phthalates, including bis (2-ethylhexyl) phthalate (DEHP) and benzyle butyl phthalate (BBzP), were associated with impaired renal function in Shanghai adults.

Keywords: Albumin; Metabolites of phthalates; N-Acetyl-β-d-glucosaminidase; Shanghai adults; β2-microglobulin.

MeSH terms

  • Adolescent
  • Adult
  • Child
  • China
  • Environmental Exposure / adverse effects*
  • Female
  • Humans
  • Kidney Diseases / epidemiology*
  • Kidney Diseases / etiology
  • Kidney Diseases / urine
  • Linear Models
  • Logistic Models
  • Male
  • Multivariate Analysis
  • Phthalic Acids / metabolism
  • Phthalic Acids / toxicity
  • Phthalic Acids / urine*

Substances

  • Phthalic Acids
  • phthalic acid