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post #1 of 11 (permalink) Old 02-17-2009, 07:22 PM Thread Starter
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FOXNews.com - Natural Viagra: Brazilian Spider Bite Causes Hours-Long Erection - Science News | Science & Technology | Technology News

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Natural Viagra: Brazilian Spider Bite Causes Hours-Long Erection

WASHINGTON —

A Brazilian spider delivers more than a painful bite that sends most victims to the hospital.
Its venom stimulates an hours-long erection. Now scientists have figured out the chemical that seems to be responsible for the penis boost.

In Brazil, emergency room staff can immediately spot the victims of a bite from the Brazilian wandering spider (Phoneutria nigriventer).

Patients not only experience overall pain and an increase in blood pressure, they also sport an uncomfortable erection.

"The erection is a side effect that everybody who gets stung by this spider will experience along with the pain and discomfort," said study team member Romulo Leite of the Medical College of Georgia, presumably speaking only about male bite victims. "We're hoping eventually this will end up in the development of real drugs for the treatment of erectile dysfunction."

The research was presented here at a poster session at the American Physiological Society (APS) annual meeting.

A recent, nationally representative study by researchers at Johns Hopkins University found that about 18 million men in the United States suffer from erectile dysfunction.

Research has shown that about one in three men with mild to moderate forms of erectile dysfunction don't respond to Viagra, with some of these men having success with either Levitra or Cialis. And men with severe erectile dysfunction have less success with the drugs.

Rodent erections

Kenia Pedrosa Nunes of the Medical College Georgia, Leite and colleagues separated the different components of the spider venom and ran tests on rats to eek out the erectile enhancer.

Dubbed Tx2-6, the compound turned out to be a relatively short string of amino acids called a peptide.

Then, they injected the venom-chemical into rats stimulated to begin an erection.

A tiny needle-like device inserted into each rat's penis measured the pressure change, which corresponds with the increase in blood flow to the blood vessels inside the penis.

Compared with control rats, those injected with the peptide showed a significant increase in penis pressure.

The scientists also found an increase in nitric oxide within the two main cylindrical cavities that run the length of the penis and are called corpora cavernosa.

Erection science

The significance of the nitric oxide is clear when the science behind an erection is considered: The brain senses sexual arousal in the body and certain neurons produce nitric oxide, a message telling the body to get started in making an erection.

A cascade of biochemical steps occurs, one of which includes the production of an enzyme dubbed cGMP.

This enzyme causes the smooth muscles of the penis' two cylinders to relax so that blood can rush in and fill up the now expandable tubes. (A human penis can hold about 10 times more blood when erect compared with its non-erect state.)

"All of this leads to vaso-dilation of vessels that go through the penis and also relaxation of those [cylindrical tube muscles]," Leite told LiveScience. "They need to relax so the blood will come inside and that's how you get an erection, because the blood gets trapped into the penis."

But erections don't last forever. The erectile party crasher, a substance called PDE-5, breaks down the cGMP and in turn transforms the erect penis into its normal limp state.

The most popular erectile-dysfunction drugs — Viagra, Cialis and Levtra — work by blocking this party crasher.

The spider chemical works in a different manner, affecting an earlier step in the erection process.

Somehow, the toxin ups the amount of nitric oxide, which sort of sets into motion an erection.

The scientists suggest that a combination of a synthetic version of the spider venom with a drug like Viagra would result in a magnified effect.

"So the combination of the two drugs could be even more efficient in patients that don't respond well to Viagra," Leite said.

Chad
1985 300CD - "Gladys" | 1998 Acura 3.0 CL | 1993 Acura Vigor GS | 2005 Dodge Magnum SXT AWD

"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)
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post #2 of 11 (permalink) Old 02-17-2009, 07:25 PM
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Alright, gotta collect me some spiders!

http://i30.photobucket.com/albums/c328/nutz4benz/W123/6C3A9CA5-EDFF-4834-8125-34B70B20A676_zpsiyesrawz.jpg
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post #3 of 11 (permalink) Old 02-17-2009, 07:28 PM
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post #4 of 11 (permalink) Old 02-17-2009, 07:29 PM Thread Starter
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Oh what a tangled spider web you weave.
It was too good to pass up.

Chad
1985 300CD - "Gladys" | 1998 Acura 3.0 CL | 1993 Acura Vigor GS | 2005 Dodge Magnum SXT AWD

"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)
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post #5 of 11 (permalink) Old 02-17-2009, 07:30 PM
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I just knew that burning down the Amazon Rain Forest was a bad idea!

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post #6 of 11 (permalink) Old 02-17-2009, 07:32 PM
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Originally Posted by chad300tdt View Post
It was too good to pass up.
You see what I mean?
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post #7 of 11 (permalink) Old 02-17-2009, 07:43 PM Thread Starter
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You see what I mean?
Yes I do. I could have chosen to post a different reporting source on this story too, but what fun would that bring.

Chad
1985 300CD - "Gladys" | 1998 Acura 3.0 CL | 1993 Acura Vigor GS | 2005 Dodge Magnum SXT AWD

"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)
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post #8 of 11 (permalink) Old 02-17-2009, 07:44 PM
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Explains why the 'rats on this board are feeling so stimulated.

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A tiny needle-like device inserted into each 'rat's penis measured the pressure change, which corresponds with the increase in blood flow to the blood vessels inside the penis.
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post #9 of 11 (permalink) Old 02-17-2009, 09:23 PM
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It's this simple, if you have reached the point of getting a blowjob from a spider, even one, much less a brazillion of them, there will not be much to do with an hours long erection. Your social life is already at zero...you are not going to get laid.

McBear,
Kentucky

Being smart is knowing the difference, in a sticky situation between a well delivered anecdote and a well delivered antidote - bear.
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post #10 of 11 (permalink) Old 02-17-2009, 09:25 PM
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I stopped reading at "Rodent erections". ed's got me feeling a bit cocky.

Quis custodiet ipsos custodes?

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