Tuesday, July 15, 2014

Genetic Matchmakers?


Matchmaker, Matchmaker,Make me a match,
Find me a find, catch me a catch
Matchmaker, Matchmaker
Look through your book,
And make me a perfect match 
(Film :Fiddler on the Roof (1971))



Perfect 46 is a recent science fiction movie  by Brett Ryan Bonowicz,  centered around a personal genomics  company  named  Perfect 46. Perfect 46  symbolizes 23 pairs of  perfectly matching genes in a progeny. The Company counsels couple planning parenting hood and based on a unique algorithm suggest  a perfect match between a donor and a receiver. 

 Well, there indeed is an element of truth in the story;  given that the United States Patent Office has granted patents to this effect to two companies  GenePeeks  and  23andMe.     The GenePeeks patent lists 14 claims  and states  that  it addresses the   need for methods of assessing  the inheritance of such complex attributes prior to, or in place of, conception. and provides a pre-conception method for  predicting the likelihood that a hypothetical child of any two persons, of opposite sex,or same sex, who may or may not be fertile , will express any trait or disease that is subject of genetic influences that have been previously characterized , completely or partially.  This patent is the foundation of GenePeeks' Matchright™   Program. Perhaps 23andMe took a few more hasty steps  towards what looked like eugenics and designer babies,   but beat a quick  retreat when   USFDA  imposed certain restrictions.  

GenePeeks claims that its  services are limited to identifying the probability of inherited diseases;  as a screening tool to select suitable donor for a given receiver or vice versa . The CEO of the company Anne Morriss had to endure anxious moments   because her baby was born with a rare genetic disorder called the MCADD ( medium chain acyl CoA dehydrogenase deficiency) which meant the baby's enzymatic apparatus  couldn't digest fat.  It was only later that she found that she as well as the sperm donor she had chosen, both carried this rare genetic trait. There are several hundred inheritable diseases but the probability  of someone receiving defective genes from  both parents is rather low. The question Anne asked was could this have been avoided?  Sure, if she had prior knowledge of the genetic makeup of herself and the donor. That was the motivation for Anne Morriss and soon the company GenePeeks and the program Matchright™   became a reality   with the active participation of molecular biologist Lee Silver.  Matchright™   aims to completely eliminate the possibility of the Mendelian diseases in  assisted reproduction technology  by thorough genetic screening of the prospective donor/recipient pair for recessive genes.   For the time being the capability of Matchright™   is limited to single gene defects but  they hope to be able to confront in future more complex diseases such as diabetes, cancer, stroke etc.  where multiple genes are implicated.


References:

Gamete donor selection based on genetic calculations 
Method and system for generating a virtual progeny genome