Video Experimental Relacionado

Updated: Jan 8, 2026

Formation of Covalent DNA Adducts by Enzymatically Activated Carcinogens and Drugs In Vitro and Their Determination by 32P-postlabeling

Formation of Covalent DNA Adducts by Enzymatically Activated Carcinogens and Drugs In Vitro and Their Determination by 32P-postlabeling

Published on: March 20, 2018

BENCENO Y EJE PITUITARIO-TIROIDES EN TRABAJADORES EXPUESTOS A LA CONTAMINACIÓN URBANA

Grazia Giammichele¹, Lucio Montuori¹, Carmina Sacco²

¹SiPro Sicurezza e Produttività nel lavoro. Via Stimigliano 5, 00199 Rome, Italy.

Journal of occupational and environmental medicine

|December 18, 2025

Abstracto

Objective:

The aim of this study is to verify if outdoor workers exposure of low-dose of benzene in urban air may affect thyroid hormone levels.

Materials And Methods:

The study was conducted on a total sample of 334 subjects. Benzene's environmental monitoring has been performed through personal dosimeters, while for the biological monitoring we have measured the concentration of blood benzene, trans, trans-muconico (t,t-MA) urinary, acid S-fenilmercapturico urinary ( S-PMA) and on thyroid hormones. The statistical analysis was performed.

Results:

statistic test shows that there is a negative correlation between blood benzene levels, t,t-MA urinary and FT3 FT4; there is a positive correlation between blood benzene t,t-MA urinary and TSH.

Conclusions:

Occupational exposure to low dose of benzene in urban pollution can affect thyroid hormones levels in occupationally exposured workers.

Palabras clave:

benceno monitorización biológica exposición ocupacional trabajadores al aire libre tiroides contaminación urbana

Más Videos Relacionados

Author Spotlight: In Vivo Assessment of Thyroid Hormone Disruption Using the THAI Mouse Model

Author Spotlight: In Vivo Assessment of Thyroid Hormone Disruption Using the THAI Mouse Model

Published on: October 6, 2023

Measuring Carbon Content in Airway Macrophages Exposed to Carbon-Containing Particulate Matters

Measuring Carbon Content in Airway Macrophages Exposed to Carbon-Containing Particulate Matters

Published on: July 12, 2024

Videos de Conceptos Relacionados

Synthesis and Regulation of Thyroid Hormones

Synthesis and Regulation of Thyroid Hormones

Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The...

Major Hormones and Their Functions

Major Hormones and Their Functions

Hormones, the biochemical messengers produced by endocrine glands, are pivotal in regulating bodily functions and maintaining homeostasis. Each hormone's balance is crucial; imbalances can lead to significant physiological disruptions. Major hormones include oxytocin, cortisol, epinephrine, estrogen, testosterone, thyroxine, growth hormone, insulin, and glucagon.
Oxytocin, produced in the hypothalamus and released by the pituitary gland, plays a role in social bonding, childbirth, and...

Types of Toxins

Types of Toxins

Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...

Pulmonary Tuberculosis I

Pulmonary Tuberculosis I

Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...

Functions of Thyroid Hormones

Functions of Thyroid Hormones

The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
TH is indispensable for the normal development and maturation of the skeletal, muscular, and nervous systems during fetal and childhood growth. It facilitates bone mineral turnover and regulates protein synthesis in developing tissues, contributing significantly to overall growth and...

Hypothalamic-Pituitary Axis

Hypothalamic-Pituitary Axis

The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.