Navigation Links
No explanation on schizophrenia gene

Many scientists have drawn another blank in their search for a universally applicable genetic explanation for schizophrenia, binding the case for new approaches to researching the illness. A paper by Douglas F. Levison and colleagues report that despite earlier findings to the contrary, there is no close link between schizophrenia and genes on the long arm of chromosome 1.//

The researchers scoured the chromosome in more than 1,900 patients before reaching this conclusion."Schizophrenia is a complex psychiatric disorder," said co-author Dr Ann Pulver of Hopkins University. "It can't be explained by either a single altered gene or a single environmental cause. There are clearly genetic components, but they are likely to be varied and to interact in many ways with non-genetic factors."

She added that it was still possible that genes on chromosome 1 may contribute to schizophrenia, but they would influence only a small proportion of patients. Dr Philip Ward of the US National Institute of Schizophrenia and Allied Disorders said the findings underscored the need for a new method to "get a handle" on the condition.

"A previous study in Science showed that there was a highly significant link to this gene," he said. "However this multicentre study shows that this does not hold across a range of populations." Dr Ward said that since the discovery of the first genetic linkage with schizophrenia, which made the cover of Nature in 1995, genes on chromosomes 6, 8, 13, 22 had been linked to schizophrenia.

"The trouble has been to get the link to replicate across different populations," he said. According to Dr Ward, such findings raise questions about the approach that needs to be taken in research. Schizophrenia is known to involve genetic factors, since people who have relatives with the condition are more likely to have it, with 40 to 60 per cent concordance between identical twins.

"This tells us there's something geneti c but that it's not that simple — otherwise there'd be 100 per cent concordance in identical twins," said Dr Ward. "We need to stop hoping to luck upon a single genetic magic bullet and start thinking about what makes people susceptible." He said it was not schizophrenia itself that was inherited, but rather risk factors that predisposed people to the condition.

There were various clues that suggested these risk factors include problems with attention and reading, problems with fine motor co-ordination, obstetric complications, and older fathers, he said. The risk factor approach is already common in research on cancer, heart disease and diabetes, but schizophrenia researchers do not yet have the large database of evidence gathered by researchers in other fields.

One limitation had been that diagnosing schizophrenia is based on self-assessed symptoms, said Dr Ward. There's no lab test for hallucinations, you just rely on the patient saying they are having them." More holistic studies, looking at the brain structure, function, and genetics of closely-related people with schizophrenia would help the field go forward, he said. We need to go beyond diagnosis to find biophysical markers." This would enable more targeted, individualised, and evidence-based treatments.


'"/>




Related medicine news :

1. Research finds new explanations for dyslexia
2. Brain changes in schizophrenia to be analyzed
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/22/2017)... ... March 22, 2017 , ... ... a PCSK9 inhibitor prior authorization (PA) form for prescribers to improve patients’ access ... of the helpful tools published as part of the article entitled “PCSK9 ...
(Date:3/22/2017)... ... March 22, 2017 , ... Soriant recognizes that ... bypasses that. Healthcare facilities across the country are always forced to focus ... and hospitals, across the country, an efficient and quick way to estimate savings ...
(Date:3/22/2017)... ... March 22, 2017 , ... In ... and print media enterprise focused on cancer patients, cancer centers and advocacy groups, ... special 12-part educational video series, “No Ifs, Ands, or Butts,” that focuses on ...
(Date:3/22/2017)... ... March 22, 2017 , ... ... that its digital marketing solutions have enabled Children’s Hospital of The King’s Daughters ... , Recognizing the value of a digital marketing approach, the 206-bed pediatric ...
(Date:3/22/2017)... ... 2017 , ... An intensive search of the medical literature has revealed no ... PhD. He says investigating this possibility, is important because Miami-Dade in 2016 ... infections with HIV. , His findings appear on Analizir.com. . Dr. ...
Breaking Medicine News(10 mins):
(Date:3/22/2017)... Research and Markets has announced the addition of the "Global ... 2025" report to their offering. ... The Global Respiratory care devices Market is ... next decade to reach approximately $38.27 billion by 2025. ... all the given segments on global as well as regional levels ...
(Date:3/22/2017)... NEW YORK , March 22, 2017 /PRNewswire/ ... pharmaceutical industry, Chinese pharmaceutical packaging market size increased ... during 2010-2016. From 2017 to 2021, the market ... 10% and is expected to outnumber RMB140 billion ... two-child policy, the rapid development of biological agents ...
(Date:3/22/2017)... FALLS, N.J. , March 22, 2017  CANTEL MEDICAL ... Jorgen B. Hansen , President and CEO, will be presenting ... Conference at the Westin Grand Central Hotel in ... Wednesday, April 5, 2017 at 3:00 p.m. ET. In addition, ... day. A live audio webcast will be ...
Breaking Medicine Technology: