Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Gene determines rapidity of ejaculation in men

08.10.2008
The rapidity of ejaculation in men is genetically determined. This is the result of research by Utrecht University. Neuropsychiatrist Dr Marcel Waldinger and Pharmacological Researcher Paddy Janssen studied 89 Dutch men with premature ejaculation and will publish the results this week in the renowned International scientific journal the Journal of Sexual Medicine.

The participants in the study by Waldinger and Janssen were 89 Dutch men who suffer from the primary form of premature ejaculation, in other words, men who always had this problem. A control group of 92 men was also studied. For a month the female partners used a stopwatch at home to measure the time until ejaculation each time they had intercourse. ‘This study applies to men who have always ejaculated prematurely from their first sexual contact onwards and not for men who started suffering from this later on in life,’ Waldinger emphasises.

Serotonin deficiency
In men who suffer from premature ejaculation, the substance serotonin appears to be less active between the nerves in the section of the brain that controls the ejaculation. Among other things, this substance is linked to sexual activity and appetite. It is a substance that transfers a signal from one neuron to another. Due to the low activity of serotonin, this signal transfer does not occur properly in men with the primary form of premature ejaculation.
Gene responsible
A gene which had already been discovered, namely 5-HTTLPR, appears to be responsible for the amount and activity of serotonin, which means that it controls the rapidity of ejaculation. Three types of the gene exist: LL, SL and SS. The study showed that the LL type causes a more rapid ejaculation. On average, men with LL ejaculate twice as quickly as men with SS, and also almost twice as quickly as men with SL. The researchers are currently also looking for other genes that are involved in ejaculation.
Not psychological
As long ago as 1998, researcher Marcel Waldinger predicted that both the rapidity with which men ejaculate and the primary form of premature ejaculation were genetically determined. ‘This theory contradicts the idea, which has been common for years, that the primary form of premature ejaculation is a psychological disorder,’ explains Waldinger. ‘The results of our research confirm the genetic theory and may contribute to possible gene therapy against premature ejaculation.’
Article
P.K.C. Janssen, M.D. Waldinger and others. Serotonin Transporter Promoter Region (5-HTTLPR) Polymorphism is Associated with the Intravaginal Ejaculation Latency Time in Dutch Men with Lifelong Premature Ejaculation, Journal of Sexual Medicine, October 7, 2008, e-pub. Dr Marcel Waldinger is a neuropsychiatrist at the Leyenburg site of the HagaZiekenhuis in The Hague and is associate professor of Sexual Psychopharmacology at Utrecht University. Paddy Janssen is a pharmacological researcher at Utrecht University. The article will appear online later this week and will then be available to journalists. Please send an e-mail to r.b.keeris@uu.nl.

Peter van der Wilt | alfa
Further information:
http://www.uu.nl

More articles from Life Sciences:

nachricht Water forms 'spine of hydration' around DNA, group finds
26.05.2017 | Cornell University

nachricht How herpesviruses win the footrace against the immune system
26.05.2017 | Helmholtz-Zentrum für Infektionsforschung

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

How herpesviruses win the footrace against the immune system

26.05.2017 | Life Sciences

Water forms 'spine of hydration' around DNA, group finds

26.05.2017 | Life Sciences

First Juno science results supported by University of Leicester's Jupiter 'forecast'

26.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>