New insights into neural tube defects

January 12, 2006 poly products supplies

The requirement for folic acid doubles during pregnancy, ⁴⁰ and insufficient intake of folic acid has been linked to low birth weight and an increased incidence of neural tube defects in newborns. Supplementation with 400 mcg per day of folic acid prior to, and shortly after, conception is effective in preventing neural tube defects.⁴¹

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Environmental and genetic factors lead to neural tube defects in 1 in every 1,000 births and cause 1 in 20 of every spontaneous abortion. One cause of these defects is the failure of cells within the neural tube to migrate to the middle of the developing neural tube.

1994 (before the fortification program) 2004, six years after fortification began. That should mean fewer birth defects tied to low maternal folic acid levels in pregnancy. These anomalies include serious neural tube defects such as spina bifida. According to the March of Dimes, about 3, 000 pregnancies are afflicted with these defects each year.

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A study in this week's issue of Nature is the first to report on the molecular mechanism that directs cells to migrate to the correct local within the developing neural tube of vertebrates.

“The FSA and the Chief Medical Officer can be confident in recommending that the UK Government introduce the mandatory fortification of flour, which could prevent about 400 pregnancies affected by neural tube defects each year, reducing both the number of terminations of pregnancy and of children born with these defects, ” they conclude.

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Most doctors, many other healthcare professionals, and the March of Dimes recommend that all women of childbearing age supplement with 400 mcg per day of folic acid. Such supplementation could protect against the formation of neural tube defects (such as spina bifida) during the time between conception and when pregnancy is discovered.

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Marek Mlodzik, PhD, Professor, Molecular, Cell and Development Biology at Mount Sinai School of Medicine has previously reported that the asymmetrical distribution of specific proteins within neural tissues in fruit flies controls the orientation and migration of cells. industrial insulated foam
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Working with colleagues Brian Ciruna, Diana Lee, and Alexander Schier, who were at New York University when the research was conducted, and Andreas Jenny of Mount Sinai, Dr. Mlodzik's and Dr. Schier's laboratories have now found that a similar mechanism is at work in vertebrates. foam insulation
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During cell division the polarity of a cell is lost. Therefore, the newly formed daughter cells initially lack the information to direct them to migrate to the midline where they are needed for proper neural tube development. The report in Nature is the first to demonstrate that the polarity is restored to the daughter cells after rather than during cell division and to provide the specific molecules involved in restoring polarity. industrial petroleum products
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After cell division, proteins that direct the polarity of the cell distribute asymmetrically. This distribution restores polarity in the daughter cell, directing them to migrate to the midline of the neural tube. petroleum products

The Mount Sinai Hospital / Mount Sinai School of Medicine