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You Have Taste Receptors In Your Lungs

timothy points out news of a study from the University of Maryland's School of Medicine that found bitter taste receptors on the smooth muscle lining airways in the lungs (abstract in Nature). Quoting: "The taste receptors in the lungs are the same as those on the tongue. The tongue’s receptors are clustered in taste buds, which send signals to the brain. The researchers say that in the lung, the taste receptors are not clustered in buds and do not send signals to the brain, yet they respond to substances that have a bitter taste. ... 'I initially thought the bitter-taste receptors in the lungs would prompt a "fight or flight" response to a noxious inhalant, causing chest tightness and coughing so you would leave the toxic environment, but that’s not what we found,' says Dr. Liggett. ... The researchers tested a few standard bitter substances known to activate these receptors. 'It turns out that the bitter compounds worked the opposite way from what we thought. They all opened the airway more extensively than any known drug that we have for treatment of asthma or chronic obstructive pulmonary disease (COPD).'"

37 of 223 comments (clear)

  1. That explains my preference by Jeremiah+Cornelius · · Score: 4, Funny

    For Dunhill over Pariament and Davidoff over Benson & Hedges!

    --
    "Flyin' in just a sweet place,
    Never been known to fail..."
  2. Great... by Greyfox · · Score: 2, Funny

    As if I didn't have enough justification for an aversion to public restrooms. Now I know that when I go into one and it smells like someone slaughtered a cow in there, my lungs will be tasting that. Thanks a lot, University of Maryland!

    --

    I'm trying to teach myself to set people on fire with my mind... Is it hot in here?

  3. Neurotransmitters Are Bitter by Doc+Ruby · · Score: 4, Informative

    When I was premed we experimented on fish with several neurotransmitters. Since I was in a frat, I eventually found myself doing shots of them (about 0.1cc each). They all tasted bitter.

    They also gave me some stomach upset and one or two caused a little abdominal cramping. And I have become steadily more weird. Though since I started out weird enough to do neurotransmitter shots, so maybe I was headed here anyway.

    --

    --
    make install -not war

    1. Re:Neurotransmitters Are Bitter by antifoidulus · · Score: 5, Insightful

      The answer is obvious, the fish neuroeceptors bonded with those in your own brain and you are now part fish. Do you find yourself flopping about when you are removed from water? Do you find yourself capable of eating until your stomach literally explodes because you have no receptors that tell you that you're full? Do you find yourself inexplicably drawn to plastic castles? If so you are a fishman, you best be hanging around the basement of draculas castle attacking anyone with a whip and sen ding him flying back into the water.

    2. Re:Neurotransmitters Are Bitter by Doc+Ruby · · Score: 4, Insightful

      The neurotransmitters were ones like GABA and acetylcholine - both humans and fish produce and use them in our nerves.

      In other words, I was already part fish. Thanks for explaining my longtime attraction to plastic castles.

      --

      --
      make install -not war

  4. You don't see that every day by Angst+Badger · · Score: 2, Insightful

    It's not very often that researchers stumble onto something cheap and simple that could potentially save hundreds of millions of lives. I sure hope it pans out in practice.

    --
    Proud member of the Weirdo-American community.
    1. Re:You don't see that every day by interkin3tic · · Score: 5, Insightful

      It's not very often that researchers stumble onto something cheap and simple that could potentially save hundreds of millions of lives. I sure hope it pans out in practice.

      No, but it's every other week that some researcher thinks he has.

    2. Re:You don't see that every day by TubeSteak · · Score: 2, Insightful

      It's not very often that researchers stumble onto something cheap and simple that could potentially save hundreds of millions of lives.

      Big Pharma + patents = perverse incentives
      There's no money to be made in taking something through the expense of clinical trials when the patent can easily be sidestepped.

      --
      [Fuck Beta]
      o0t!
    3. Re:You don't see that every day by Interoperable · · Score: 4, Insightful

      Well, it's at least that often that a science journalist misrepresents a researcher's statements to make it sound like he thinks he has.

      --
      So if this is the future...where's my jet pack?
  5. Coffee by xaoslaad · · Score: 4, Interesting

    Any chance this is why the coffee for asthma remedy is supposedly effective? Perhaps inhaling the vapors for a bitter fluid are doing just what they described here?

    1. Re:Coffee by flows · · Score: 2, Interesting

      Any chance this is why the coffee for asthma remedy is supposedly effective? Perhaps inhaling the vapors for a bitter fluid are doing just what they described here?

      My thoughts exactly! As an asthmatic, I have found myself often alleviated by coffee. My assumption was that either the warmth or maybe even the caffeine was responsible.

      Can it be why just the smell of coffee makes me feel better?

      I'm surely paying more attention in the future. *Goes get more coffee*

    2. Re:Coffee by hitnrunrambler · · Score: 3, Interesting

      The primary effectiveness of coffee comes from the stimulant properties of caffeine (take a couple of shots from an inhaler in close proximity with coffee and you'll notice that the stimulant effects of both compound for an unpleasant jittery effect).

      HOWEVER the bitter vapors may very well increase the effectiveness.

      I'm not surprised by this at all, based on decades of experience with bronchial problems.

      Things I've noticed:
      Cinnamon tends to have a soothing effect; particularly a "tea" of cinnamon with a shot of whiskey for good measure

      hanging my head over a steaming bowl of water seems to help, tossing in fragrant spices seems to help more

      Certain things do create a "content based sensation" in the lungs when inhaled; fragrant steams and inhalers themselves come to mind. (I've always had the weirdest feeling of being able to taste cold air, when it gets down a little below freezing I experience a smoky sensation that doesn't seem to come from anywhere in particular)

    3. Re:Coffee by BobMcD · · Score: 2, Insightful

      (I've always had the weirdest feeling of being able to taste cold air, when it gets down a little below freezing I experience a smoky sensation that doesn't seem to come from anywhere in particular)

      That's the moisture in your airways 'steaming up' due to contact with the cold. Same thing that you'd see if you exhaled into that same air, but on the inside...

  6. Re:Maybe some help for Asthmatics by PinkyGigglebrain · · Score: 4, Interesting

    Since it uses a completely different mechanism than current drugs, which relax the bronchial muscles directly, and works better as well, it would not only be safer for children and people in general but vastly cheaper.

    I wonder if this has any bearing on how hot toddy's work?

    _

  7. Re:Maybe some help for Asthmatics by robbak · · Score: 2, Informative

    Sour and Bitter are two different tastes, but that's kind of the idea!

    --
    Prediction for end of Universe #42: Fencepost error in Quantum_bogosort.cpp
  8. Bitrex in Airdusters!? by oRiCN · · Score: 2, Interesting

    So, All along the Bitrex they put in airdusters has been helping people reach an extra high?

  9. Re:Maybe some help for Asthmatics by mysidia · · Score: 5, Insightful

    it would not only be safer for children and people in general but vastly cheaper.

    Cheaper?

    If it can't be patented and net drug companies billions of $$$; I doubt there will be a company to spend the millions for the research required to get "bitter-taste-based medication" through FDA approval.

    Once they have the patent on the method of operation ("bitter tasting substance used to treat COPD, or bitter tasting substance used to treat asthma by stimulating lung taste receptors"), they will charge the standard markups all proprietary drugs get.

    IOW -- it will probably be more expensive, or we'll probably never see a product based on that come to market that can be legally marketed as such. Just a bunch of studies that show the idea is promising.

  10. Beer(Hops)/Coffee & Cigs by Sebilrazen · · Score: 2, Interesting

    Seems this could be why beer and coffee go so well with smokes, they make it easier to breathe while puffing on that chimney stick.

    --
    "There are no facts, only interpretations." --Friedrich Nietzsche.
  11. Evolutionary perspective by scapermoya · · Score: 3, Interesting

    I wonder what might be the reasoning behind this system evolving/remaining intact in humans. I can't really think of an exogenous substance that we inhale naturally that would activate such a response and confer an advantage to us. My best guess would be that the natural ligand for these receptors is something that is produced locally in the lungs in scenarios where bronchiodilation is desired (ie sympathetic stimulation). as someone else pointed out, many of the common neuroreceptors are alkaloids, and would probably activate these receptors. From the abstract, it sounds like these receptors are Gq (IP3 and calcium) receptors, which is interesting because the "classic" receptors that dilate the smooth muscle in the lungs are Gs receptors that stimulate increased cAMP. In smooth muscle, more calcium generally leads to stronger, not weaker, contraction. cAMP leads to relaxation, explaining why epinephrine and albuterol have their effects.

    didn't have time to read the whole paper. exam on this stuff tomorrow though, wonder if I can use this on an essay question?

    /med student

    --
    Beware the Jubjub bird, and shun the frumious Bandersnatch.
    1. Re:Evolutionary perspective by sFurbo · · Score: 2, Interesting

      Genetic drift would tend to remove such features, as there are many more ways for them not to work then there is for them to work. If they aren't useful, the alleles coding for broken variants will not be removed, and in time, there will be more of them then of the alleles coding for the working variants. Unless the alleles coding for the working variants also code for something else which is useful, or something like that (is placed close to important genes, etc.).

    2. Re:Evolutionary perspective by hedwards · · Score: 3, Insightful

      I doubt there's a reason for it in that sense. Things which don't hurt our capability to reproduce tend to just hang around until such time as they do hurt our chances to reproduce. It could for all we know just be a minor glitch causing the cells to migrate in a way which isn't necessary.

      I mean why do some people have trouble smelling sulfur and others don't. Why do some people retain the ability to wiggle their ears while others don't. Or for that matter have ear lobes. None of those things are particularly make or break it in the current environment, but who knows maybe if things change they'll be more important.

  12. Bitter scents from the natural environemnt by solferino · · Score: 4, Interesting

    The idea that occurred to me while reading the summary is maybe this partially explains the sense of well-being gained from being in a forest or some leafy natural environment.

    As we know, most plants taste bitter - perhaps plants are also releasing bitter tasting gasses which help to open up our lungs.

  13. Re:Cynical Me by SharpFang · · Score: 2, Interesting

    They already control growth of cannabis, which would otherwise be a common weed.

    --
    45 5F E1 04 22 CA 29 C4 93 3F 95 05 2B 79 2A B2
  14. Re:Maybe some help for Asthmatics by PinkyGigglebrain · · Score: 3, Interesting

    No, a naive man would believe the advertising by the Pharmacorps that they only have the best interests of the public at heart.

    I would call your observation accurate and realistic. If they can they will profit from this as much as possible, if they can not they will do everything they can to bury this or ensure that only they can control the distribution channels, which they will then manipulate to either make it impossible to get or cost so much that no one can afford it. Then they will stop distributing it "because there is no demand".

    _

  15. Re:Cynical Me by TheEyes · · Score: 3, Interesting

    If the government 'controlled' the growth of cannabis, how come there hasn't been a reduction in availability?

    Right, because the government is too incompetent to even get rid of fucking kudzu.

    Hey, they've done a great job making it more expensive: as an illegal drug its street value is roughly five times what it would be if it were legalized. Gotta keep those cartels in business; without marijuana their annual profit would be about 20-25% lower than it is.

    Support Mexican Cartel violence! Keep Marijuana Illegal! (Paid for by police chiefs far away from the border)

  16. Re:Maybe some help for Asthmatics by Maury+Markowitz · · Score: 4, Interesting

    AM I being a naive old man watching people complain about companies who save millions of people's lives and improves the lives of millions of others evert day, and all they take in return is paper with patterns painted on it.

    Seriously, I spend more on coffee than Singulair, but the later is by any definition, a miracle drug.

    Grow up. If you don't like them making all that money off the hard working backs of all those poor people you pretend to know, BUY SHARES.

  17. Re:Maybe some help for Asthmatics by FatdogHaiku · · Score: 2, Interesting

    Well, anyone with an SVN (small volume nebulizer) could test this at home... two issues would be remembering that sour != bitter and selecting a safe bitter testing substance.

    Tonic water contains a small amount of quinine, which is considered bitter. That might be an interesting development, Schweppes for COPD.

    Of course I'm not suggesting that anyone with a health issue such as COPD should undertake such home tests. If, as you suggest, other countries found effective therapies, it would be hard to stop the many home SVN owners from following up if the substance was common...

    --
    You have the right to remain sentient. If you give up the right to remain sentient, you will be elected to public office
  18. Re:Maybe some help for Asthmatics by drinkypoo · · Score: 2, Interesting

    While you are correct, it might also be so simple that you can whip up an herbal extract and put it in an atomizer. I suspect that a water-based extract of some bitter herb is all that is necessary, plus perhaps a tiny smidge of citric acid or alcohol for freshness (don't get carried away, kids!)

    The expensiveness and homicidal dreams of anti-malaria medication don't prevent a tea made from olive leaves from curing malaria. Fucking Pliny knew about this if that helps you understand how old it is, yet today we're using harmful bullshit to treat it instead.

    --
    "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
  19. Re:Maybe some help for Asthmatics by Stile+65 · · Score: 4, Interesting

    The abstract says that saccharin was tested. That's a very easy to get substance.

    --
    I claim first use of "Error No. 0B" - or "No. 0B error." It'll be the new ID 10T!
  20. Re:Maybe some help for Asthmatics by Heed00 · · Score: 3, Funny
    Hmm, Singulair side effects include...

    ...other side effects such as agitation, aggression, anxiousness, dream abnormalities and hallucinations, depression, irritability, restlessness and tremor. http://en.wikipedia.org/wiki/Montelukast#Side_effects

    "...and all they take in return is paper with patterns painted on it."

    And if this little characterization doesn't falls under the "dream abnormalities and hallucinations" heading, then I don't know what would.

    --
    Thought thinks itself.
  21. Re:Cynical Me by delinear · · Score: 2, Insightful

    Good luck taking away people's coffee or cocoa beans.

  22. Re:Maybe some help for Asthmatics by mysidia · · Score: 2, Interesting

    While you are correct, it might also be so simple that you can whip up an herbal extract and put it in an atomizer. I suspect that a water-based extract of some bitter herb is all that is necessary

    Yes... if people self-medicate, at their own risk, some people could try that.

    Their doctor/health care professional, however, would be taking so huge a legal risk to recommend or order use of a product as a medication not FDA approved for that usage, they would probably not do that

    Without someone running clinical trials, there are many unknowns.

  23. Re:Maybe some help for Asthmatics by drinkypoo · · Score: 2, Funny

    Their doctor/health care professional, however, would be taking so huge a legal risk to recommend or order use of a product as a medication not FDA approved for that usage, they would probably not do that

    That's okay, most of middle america can't afford to go to the doctor any more, so that's a non-issue. (The poorest people, of course, receive the standard sub-standard health care...)

    --
    "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
  24. Re:Cynical Me by Civil_Disobedient · · Score: 4, Funny

    Have you ever seen someone high on pot drive? they are worse than drunks. [...] How do you know someone won't go homicidal while on pot?

    OK, OK, we get that you've never smoked.

  25. Re:Maybe some help for Asthmatics by Hatta · · Score: 2, Interesting

    Their doctor/health care professional, however, would be taking so huge a legal risk to recommend or order use of a product as a medication not FDA approved for that usage, they would probably not do that

    That's nonsense, it happens all the time. One example, Propranolol is a beta blocker originally indicated as a heart medication. It's quite effective and very safe. It's never been approved for treating anxiety, but doctors hand it out like candy to musicians and performers to handle stage fright. There's nothing illegal about a doctor prescribing an approved drug for an off-label indication.

    --
    Give me Classic Slashdot or give me death!
  26. Re:Maybe some help for Asthmatics by JeffSpudrinski · · Score: 2, Interesting

    "Singulair side effects include...other side effects such as agitation, aggression, anxiousness, dream abnormalities and hallucinations, depression, irritability, restlessness and tremor"

    Sounds like the same side effects of the coffee he referred to.

    -JJS

  27. Re:Maybe some help for Asthmatics by drcheap · · Score: 2, Funny

    ...I always knew saccharin had a weird after-taste.

    That's because you were doing it wrong...you are supposed to put it in your iced tea, not snort it through the straw.