What are embryotoxic effects?
Embryotoxicity is any morphological or functional alteration caused by chemical or physical agents that interferes with normal growth, homeostasis, development, and differentiation of fetus.
What is embryonic toxicity?
Embryotoxicity includes (1) production by a substance of toxic effects in progeny in the first period of pregnancy between conception and the fetal stage and (2) any toxic effect on the conceptus as a result of prenatal exposure during the embryonic stages of development.
What should you do if exposed to hazardous chemicals?
First Aid: Chemical Exposure
- Stop the source. Remove the victim from contact with the chemical spill, airborne particles, or fumes.
- Clear the lungs. Take the victim to fresh air.
- Flush the eyes. Flush the affected eye with water for at least 15 minutes.
- Clean the skin.
What is a local reaction chemical?
Skin and Eye Contact Skin contact with a chemical may result in a local reaction, such as a burn or rash, or absorption into the bloodstream. Absorption into the bloodstream may then allow the chemical to cause toxic effects on other parts of the body.
What is an Embryotoxin in chemistry?
Embryotoxins are substances that act during pregnancy to cause adverse effects on the fetus. These effects include embryo lethality (death of the fertilized egg, the embryo, or the fetus), malformations (teratogenic effects), retarded growth, and postnatal functional deficits.
What is true of the effect of toxicants on embryos and fetuses?
Exposures to some chemicals during pregnancy can lead to the development of cancer later in the life of the child and are called transgenerational carcinogens. Exposure to toxicants during the second and the third trimester of a pregnancy can lead to slow fetal grown and result in low birth weight.
What substance is known as a developmental toxin?
The substance that causes developmental toxicity from embryonic stage to birth is called teratogens.
What will you do if you accidentally spill chemicals into your skin?
Wash thoroughly (15 minutes) with water using nearest deluge shower or hand/spray unit. Remove any overlying clothing that may retain the chemical and prevent thorough washing of the skin. Depending on the chemical, additional medical treatment may be required.
What should be your immediate reaction if chemicals come into contact with your skin?
If this chemical contacts the skin, immediately flush the contaminated skin with water. If this chemical penetrates the clothing, immediately remove the clothing and flush the skin with water. Get medical attention promptly. If this chemical contacts the skin, flush the contaminated skin with water promptly.
Does a local reaction enter the bloodstream?
Local reaction with mast cells increases the permeability of the mucosa of the gut, and in many cases the antigen enters the bloodstream and also produces hives.
What is embryotoxicity and teratogenicity?
Embryotoxicity is any morphological or functional alteration caused by chemical or physical agents that interferes with normal growth, homeostasis, development, and differentiation of fetus. Abnormal sex hormone exposure during critical periods of development has been postulated for pathological mechanism for embryotoxicity or teratogenicity.
How do you test for toxicity in zebrafish embryos?
Zebrafish embryo toxicity assays include the fish acute toxicity test (OPPTS 850.1075) and the fish early-life stage toxicity test (OPPTS 850.1400) ( He et al., 2014 ). Due to the presence of unfertilized eggs and the time required to select healthy embryos, the treatment time of drugs and chemicals is usually 6 h postfertilization (hpf).
What is Danio rerio embryotoxicity test?
Danio rerio embryotoxicity test (DART) is based on the study of the effects on embryos as a consequence of their exposure to the tested chemical for 48 h. DART is considered an in vitro test and is accepted as an alternative method to animal experimentation.
Is C longa extract toxic to zebrafish embryos and larvae?
In spite of the widely reported therapeutic applications of C. longa, research on its safety and teratogenic effects on zebrafish embryos and larvae is still limited. Hence, this research aimed to assess the toxicity of C. longa extract on zebrafish.
