Earlier, the Center for Human Genetics team published the first molecular prenatal diagnosis of TSC. The current study details the sequencing of the TSC genes (TSC1 and TSC2) analysed in 50 completed pregnancies. These findings appear in the March 2009 issue of the American Journal of Obstetrics and Gynecology.
TSC is a genetic disorder that causes tumors to form in many different organs, primarily the brain, eyes, heart, kidney, skin and lungs. In addition, this condition accounts for mental retardation in about 44 percent of patients. Current estimates place TSC-affected births at one in 6,000. Nearly 1 million people worldwide are known to have TSC, with approximately 50,000 in the United States.
Remarkable advances have occurred in prenatal genetic diagnosis including the resequencing of the 2 tumor-suppressor genes (TSC1 and TSC2) for TSC. DNA studies were performed on amniotic fluid cells and chorionic villi from 50 pregnant women at risk for having a child with TSC. Among the 50 families studied, mutations were precisely identified in 48 tested fetuses. Mutations were determined by gene sequencing and deletion/duplication analysis of the two TSC genes. Insufficient DNA and poor amniotic fluid cells accounted for no diagnosis in two cases.
According to the researchers, sequencing both the TSC1 and TSC2 genes facilitated detection of about 83 percent of mutations. Coupled with multiple ligation-dependent probe amplification assays an overall detection rate of nearly 93 percent was achieved.
"Physicians are advised to be alert to family history of TSC or unexplained mental retardation and to first test a known affected family member and/or preconception testing rather than the anxiety-provoking, last-minute efforts at prenatal testing initiated in the second trimester of pregnancy," said lead author Aubrey Milunsky, MBBCh, DSc, FRCP, FACMG, DCH, Director of the Center for Human Genetics at BUSM, as well as a professor of human genetics, pediatrics, pathology and obstetrics and gynecology at BUSM.
"Given the clinical and molecular complexities of TSC, it would be advisable for all couples at risk to be referred to a clinical geneticist for evaluation and counseling," he added.
Gina DiGravio | EurekAlert!
Hepatitis: liver failure attributable to compromised blood supply
19.12.2018 | Technische Universität München
Collagen nanofibrils in mammalian tissues get stronger with exercise
14.12.2018 | University of Illinois College of Engineering
Different eras of civilization are defined by the discovery of new materials, as new materials drive new capabilities. And yet, identifying the best material...
Researchers from the University of Basel have reported a new method that allows the physical state of just a few atoms or molecules within a network to be controlled. It is based on the spontaneous self-organization of molecules into extensive networks with pores about one nanometer in size. In the journal ‘small’, the physicists reported on their investigations, which could be of particular importance for the development of new storage devices.
Around the world, researchers are attempting to shrink data storage devices to achieve as large a storage capacity in as small a space as possible. In almost...
The more objects we make "smart," from watches to entire buildings, the greater the need for these devices to store and retrieve massive amounts of data quickly without consuming too much power.
Millions of new memory cells could be part of a computer chip and provide that speed and energy savings, thanks to the discovery of a previously unobserved...
What if, instead of turning up the thermostat, you could warm up with high-tech, flexible patches sewn into your clothes - while significantly reducing your...
A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.
The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...
12.12.2018 | Event News
10.12.2018 | Event News
06.12.2018 | Event News
19.12.2018 | Materials Sciences
19.12.2018 | Materials Sciences
19.12.2018 | Life Sciences