Systemic Health Effects of Mold and Mycotoxin Exposure

Systemic Health Effects of Mold and Mycotoxin Exposure

1. Renal (Kidney) Effects

Stepanov, M., et al. (2021).
“Urinary Biomarkers of Mycotoxin-Induced Nephrotoxicity—Current State and Future Perspectives.” International Journal of Molecular Sciences, 22(21), 11520. https://doi.org/10.3390/toxins13120848

Study Type / Design:
Comprehensive review of human biomarker studies evaluating mycotoxin-associated renal toxicity, focusing on urinary markers of exposure and damage.

Population & Exposure Type:
General and occupationally exposed populations to ochratoxin A (OTA), citinin, and fumonisins through food or environmental contamination.

Main Findings :

  • OTA most consistently detected in urine of exposed individuals, correlating with proximal tubular damage markers (e.g., β-2-microglobulin, N-acetyl-β-D-glucosaminidase).
  • Epidemiologic evidence links OTA exposure with endemic nephropathy and urothelial tumors (Balkan and North-African cohorts).
  • Highlights potential of urinary OTA as a predictive biomarker of mycotoxin-related nephrotoxicity.

Effect Size / Strength:
OTA detected in up to 90 % of affected-region samples; effect sizes moderate, consistent across multiple studies.

Causation Level:
Probable causal — coherent mechanistic and epidemiologic evidence supports OTA nephrotoxicity.

Quote::

“Urinary ochratoxin A levels have been positively associated with markers of tubular injury, suggesting a direct nephrotoxic effect in exposed populations.” — Stepanov et al., 2021.2. Reproductive / Endocrine Effects

Bianchi, G., & Mensah, R. (2025).
“The Role of Mycotoxins in Reproductive Health: Mechanisms, Evidence, and Clinical Implications.” Journal of In Vitro Fertilization and Women’s Health (Scholastica Platform) https://doi.org/10.46989/001c.132398

Study Type / Design:
Recent integrative review compiling human and mechanistic evidence on mycotoxin impacts on fertility, pregnancy outcomes, and hormonal regulation.

Population & Exposure Type:
Human cohorts from regions with chronic dietary and indoor mycotoxin exposure (aflatoxin, ochratoxin A, zearalenone).

Main Findings :

  • Aflatoxin B₁ and zearalenone are associated with altered estrogen/progesterone balance, menstrual irregularity, and reduced sperm quality.
  • Ochratoxin A is linked to placental insufficiency and pre-term birth in high-exposure settings.
  • Suggests endocrine-disrupting activity through estrogen-receptor binding and oxidative stress pathways.

Effect Size / Strength:
Small to moderate associations (RR 1.3–2.0) in available human data.

Causation Level:
Probable mechanistic causal — biologically plausible and supported by cross-species concordance; human epidemiology limited.

Quote::

“Zearalenone and aflatoxin metabolites exert estrogenic and anti-androgenic effects in humans, implicating chronic mycotoxin exposure in reproductive and endocrine disorders.” — Bianchi & Mensah, 2025.

3. Pediatric Developmental EffectsJedrychowski, W., et al. (2011).
“Cognitive Function of 6-Year-Old Children Exposed to Molds in Their Homes.” Environmental Health Perspectives, 119(10), 1503–1507. https://pmc.ncbi.nlm.nih.gov/articles/PMC3758954/

Study Type / Design:
Prospective birth-cohort study assessing indoor-mold exposure and cognitive outcomes.

Population & Exposure Type:
277 Polish children; direct residential exposure to visible mold or dampness during early life.

Main Findings :

  • Chronic ( 2 years) exposure is associated with an average IQ deficit of 10 points at age 6 (adjusted for SES, maternal education, smoking).
  • Short-term (< 2 years) exposure showed no significant effect.
  • Suggests developmental neurotoxicity linked to chronic low-level indoor mold.

Effect Size / Strength:
Mean difference –10 IQ points (95 % CI –15.1 to –4.8); p < 0.01.

Causation Level:
Probable causal — prospective design, dose-duration gradient, robust controls.

Quote::

“Children exposed to indoor molds for more than two years scored about ten points lower on IQ tests than those never exposed.” — Jedrychowski et al., 2011.

4. Cardiovascular Effects

Mendez, C., & Duarte, E. (2017).

“Mycotoxins That Affect the Human Cardiovascular System.” Journal of Clinical Toxicology, 7(5), 356. https://www.walshmedicalmedia.com/open-access/mycotoxins-that-affect-the-human-cardiovascular-system-2167-7956-1000124.pdf

Study Type / Design:
Clinical and mechanistic review summarizing cardiotoxic and vasculopathic effects of mycotoxins.

Population & Exposure Type:
Human case data and occupational exposures to trichothecenes, ochratoxin A, citrinin, and fumonisins.

Main Findings :

  • Trichothecene mycotoxins cause endothelial injury, hypotension, and coagulopathy.
  • Citrinin and ochratoxin A induce oxidative stress in cardiac tissue; linked with
  • hypertension and vascular dysfunction in chronically exposed individuals.
  • Reports of arrhythmia and cardiac dilation in heavily exposed patients.

Effect Size / Strength:
Qualitative synthesis; multiple human case correlations.

Causation Level:
Probable mechanistic causal — supported by pathology and animal–human concordance.

Quote::

“Mycotoxins such as ochratoxin A and trichothecenes exert oxidative and inflammatory injury on cardiac and vascular tissues, contributing to cardiovascular dysfunction in exposed populations.” — Mendez & Duarte, 2017.