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Teratogenicity01:07

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The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...
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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.
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Phase I biotransformation reactions are integral to drug metabolism, predominantly involving oxidative, reductive, and hydrolytic transformations. Chief among these are oxidative reactions, which enhance the hydrophilicity of xenobiotics and introduce polar functional groups to facilitate their elimination from the body.
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Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
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[Polycyclic aromatic hydrocarbons exposure and birth defects].

S S Lin1, Y Huang, C Y Wang

  • 1Department of Epidemiology and Biostatistics, School of Public Health, Peking University; Insititute of Reproductive and Child Health/Ministry of Health Key Laboratory of Reproductive Health, School of Public Health, Peking University, Beijing 100191, China.

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Exposure to polycyclic aromatic hydrocarbons (PAHs) during pregnancy is linked to birth defects like heart defects and neural tube defects. Further research is needed to clarify the exact mechanisms involved.

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Area of Science:

  • Environmental Health
  • Reproductive Toxicology
  • Developmental Biology

Background:

  • Birth defects are a significant public health concern with substantial economic and social impact.
  • Polycyclic aromatic hydrocarbons (PAHs) are widespread environmental pollutants from incomplete combustion.
  • PAHs can enter the body through ingestion, inhalation, and other routes.

Purpose of the Study:

  • To review the association between polycyclic aromatic hydrocarbon (PAH) exposure and birth defects.
  • To explore the potential mechanisms linking PAH exposure to adverse birth outcomes.
  • To provide recommendations for future research and public health interventions.

Main Methods:

  • Review of epidemiological data on PAH exposure and birth defects.
  • Analysis of experimental evidence from animal studies.
  • Examination of proposed biological mechanisms, including oxidative stress and signal transduction pathways.

Main Results:

  • Epidemiological and animal studies suggest a correlation between maternal PAH exposure and birth defects.
  • Specific defects linked to PAH exposure include congenital heart defects, neural tube defects, and cleft lip/palate.
  • Potential mechanisms involve oxidative stress, cellular damage, and altered signaling pathways.

Conclusions:

  • Maternal exposure to polycyclic aromatic hydrocarbons (PAHs) during pregnancy may increase the risk of certain birth defects.
  • Oxidative stress and disruptions in cellular signaling are plausible mechanisms underlying these associations.
  • Further investigation is warranted to elucidate these mechanisms and inform preventative strategies.