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Related Experiment Video

Updated: Jun 27, 2026

Induction of Nephrotic Syndrome in Mice by Retrobulbar Injection of Doxorubicin and Prevention of Volume Retention by Sustained Release Aprotinin
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Thyroid function in patients with proteinuria.

R Gilles1, M den Heijer, A H Ross

  • 1Department of Nephrology, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands. r.gilles@nucmed.umcn.nl

The Netherlands Journal of Medicine
|December 17, 2008
PubMed
Summary
This summary is machine-generated.

Patients with proteinuria exhibit elevated thyroid-stimulating hormone (TSH) levels due to urinary hormone loss. However, this typically does not lead to overt hypothyroidism, warranting further investigation into subclinical thyroid dysfunction.

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Area of Science:

  • Endocrinology
  • Nephrology
  • Clinical Biochemistry

Background:

  • Proteinuria can cause significant loss of functional proteins, including hormones and binding proteins.
  • Previous studies noted urinary losses of thyroid hormones and thyroxine-binding globulin, with some cases of hypothyroidism.
  • The impact of proteinuria on thyroid function in a large cohort remained unexamined.

Purpose of the Study:

  • To assess thyroid function parameters in patients with proteinuria.
  • To compare thyroid function in proteinuric patients (negative for thyroxine peroxidase antibodies) with healthy controls.

Main Methods:

  • Evaluation of thyroid function parameters (free thyroxine, TSH) in 159 proteinuric patients.
  • Comparison with age- and gender-matched controls from the Nijmegen Biomedical Study.
  • Exclusion of patients with thyroxine peroxidase antibodies to isolate proteinuria effects.

Main Results:

  • Proteinuric patients showed significantly higher median TSH levels (1.81 mU/l) compared to controls (1.34 mU/l).
  • Despite higher TSH, overt hypothyroidism was diagnosed in only one patient.
  • Patient cohort characteristics: median age 52 years, 111 males, 48 females, median proteinuria 6.6 g/10 mmol creatinine.

Conclusions:

  • Proteinuria is associated with increased TSH levels, suggesting urinary thyroid hormone loss.
  • Urinary losses in proteinuria do not typically cause clinically significant overt hypothyroidism.
  • The potential role of subclinical hypothyroidism in proteinuric patients requires further research.