First-trimester amniotic fluid acetylcholinesterase electrophoresis

Area of Science:

• Biochemistry
• Prenatal Diagnostics
• Developmental Biology

Background:

• Neural tube defects (NTDs) are common congenital abnormalities.
• Early and accurate prenatal diagnosis of NTDs is crucial for management.
• Amniotic fluid analysis offers a potential avenue for prenatal screening.

Purpose of the Study:

• To investigate the presence and changes of acetylcholinesterase (AChE) in normal amniotic fluid during early pregnancy.
• To evaluate the potential of AChE gel electrophoresis as an early diagnostic marker for neural tube defects.

Main Methods:

• Collection of normal amniotic fluid samples from pregnancies between 4 and 15 weeks.
• Performance of acetylcholinesterase (AChE) gel electrophoresis on all collected specimens.
• Analysis of AChE positivity and its correlation with gestational age.

Main Results:

• All amniotic fluid samples were AChE-positive up to 8 weeks of gestation.
• AChE positivity decreased progressively between 9 and 11 weeks.
• No AChE-positive specimens were detected after 12 weeks of pregnancy.

Conclusions:

• Amniotic fluid acetylcholinesterase levels change predictably during early pregnancy.
• AChE gel electrophoresis may serve as a valuable tool for the prenatal diagnosis of neural tube defects.
• This diagnostic potential is particularly relevant for assessments after the 12th week of gestation.