One Question about stem cells

What is to say that the stem cells will grow into the hairs within the cochlea like what is found within a good healthy cochlea? Will they get the building instructions from within the cochlea that the already had the defective hair. This could mean that the new hair will be just as defective as what was already there.

There seams to be some thought that these hairs will just appear, the nerves will begin working as if nothing ever happened. I find it hard to believe it will just happen this way. It will take some time for training to occur, the brain to start understanding this new stimulation, etc. Today, I'm keeping my brain working by using a CI. It just happens to create the electrical stimulation instead of the nerve doing it. For all I know, my hair fibers are good and the nerves just ran out of juice therefore are no longer sending the electrical stimulation.

Now just think if the stem cells mutate into some sort of thicker hair fiber that doesn't wiggle as much. Will that still give the right stimulation to the nerve to hear the sound as it really is or something different. Sounds like it could be much the same as a CI. What happens if it grows like weeds and fills up the cochlea. You may have bigger problems. To me, sounds like a CI may be more consistant in results than growing some hair fibers.

Thinking about stem cells, if this is something that gets injected into the cochlea, what is to say that all the stem cells will fall into the high frequency range area of the cochlea and little gets down to the lower frequency range. Now you still don't hear like you would dream of.

I just think that for stem cells to become a realistic option, it is going to take years. For some on this forum who have already made up their mind, it seams like they still have residual hearing that they can fall back on. For me and others, there was no residual hearing to fall back on and for someone who has never heard through a CI nor received stem cell treatment to say that a CI offers less benefit than Stem cells will has not considered of the variables. All I can say is I hear through my CI the same sound range as I did when I was hearing with a normal audiogram.

I believe it is time for a new forum on AllDeaf for the "Stem Cell Discussion" and get it off of the "Hearing Aid and Cochlear Implant" forum.
 
I am NOT against stem cells at all! I would very much like stem cells would be a real choice RIGHT NOW.
(My 2yr-old son has a profound hearing loss and we are in the decision step wether to implant him or not. It is the most difficult dicision I've ever taken. He is getting SOME benefit from HAs, but besides he gives quite a few feedbacks with noises and sounds, he performs pretty poor with voice recognition/discrimination. Nevertheless we cannot state he is getting absolutely no benefit from the HAs...)
The point is that, besides what some of you are saying, the official scientific community is working hard on the stem cells field, but it is not possible to state when a real therapy will be available.
Make a search in PubMed, you'll find a lot of peer reviewed scientific papers dealing with that. I mean peer reviewd scientific papers, not commercial communications!!
Here below you can find a couple of examples of recent review on prestigious journals, dealing with that. I posted the abstracts, unfortunately the full text is under copyright and cannot be posted in a public forum. Especially the first one is from Nature Neuroscience, probably the most relevant source of information in this field.
It is clear that we are reasonably close to having a cure, but...

Obviously everybody is free to choose the route for himself!! Nobody would like to push for HAs, CIs, or whatever, a part from the correlated corporations...


From: Nat Neurosci. 2009 May 26;12(6):679-685.
Quo vadis, hair cell regeneration?
Brigande JV, Heller S.

Department of Otolaryngology, Oregon Hearing Research Center, Oregon Health & Science University, Portland, Oregon, USA.


Hearing loss is a global health problem with profound socioeconomic impact. We contend that acquired hearing loss is mainly a modern disorder caused by man-made noise and modern drugs, among other causes. These factors, combined with increasing lifespan, have exposed a deficit in cochlear self-regeneration that was irrelevant for most of mammalian evolution. Nevertheless, the mammalian cochlea has evolved from phylogenetically older structures, which do have the capacity for self-repair. Moreover, nonmammalian vertebrates can regenerate auditory hair cells that restore sensory function. We will offer a critical perspective on recent advances in stem cell biology, gene therapy, cell cycle regulation and pharmacotherapeutics to define and validate regenerative medical interventions for mammalian hair cell loss. Although these advances are promising, we are only beginning to fully appreciate the complexity of the many challenges that lie ahead.




From: Adv Otorhinolaryngol. 2009;66:64-86.
Gene therapy and stem cell transplantation: strategies for hearing restoration.
Kesser BW, Lalwani AK.

Department of Otolaryngology-Head and Surgery, University of Virginia School of Medicine, Charlottesville, VA, USA.


Strategies to restore sensorineural hearing loss focus on the replacement of lost hair cells, the specialized mechanoreceptors in the organ of Corti that convert the mechanical energy of sound into electrical energy. Hair cells in mammalian systems do not have the capacity to regenerate, but two exciting lines of research hold promise in restoring inner ear function. Here we review basic principles of gene therapy and discuss its application in the inner ear. We survey the various viral vectors and routes of delivery into the inner ear. Applications of gene therapy in the inner include hair cell protection in the face of chemical or noise-induced ototoxicity, spiral ganglion cell survival following hair cell death or injury, and hair cell regeneration. More recently, the viability of gene therapy in human inner ear tissue has been reported. Transplantation of progenitor cells that can differentiate into functioning hair cells with the appropriate connections to their corresponding spiral ganglion cells is yet another strategy to restore sensorineural hearing loss. Neonatal or embryonic stem cells, adult mouse inner ear stem cells, and stem cells from the central nervous system have been shown to differentiate into cells containing hair cell markers and proteins. Prospects for stem cell therapy in the inner ear, and its limitations, will also be examined.
 
You already had hearing for the first 4 years of your life which is vital for speech development. Brains is like sponge it absorbs very well and stores well. With HA for many years to stimulate the hearing had helped you to keep your speech recongition.

Ive seen many others like him, some of who are prelingual. He has alot more hearing than either of us so of course hes getting good benefit from HAs.

however all my life it doesn't matter how much AVT I had my hearing aids weren't doing the job.... it was like an instant relief when i got the CI so it's not every one with HA can do better than CI.

Ive already said and agreed in your case CI was likley to help. In my case, I probably won't get above 50% speech till I get more hearing. All the training will only help to a point.

You are hypocrital git, You threw toys out of pram when we told you that you shouldn't have CI with good speech recogition!

That's one thing I agree as well. Im glad to see that Phi4sius has changed his mind after doing his research and after being rejected by insurance. Stem cells will give him 10x better hearing. :D

We merely were trying to help you all to sense that YOU, Deafdude and other people KNOW nothing about how to hear out of CI whilst having NO idea what will happen when stem cell comes out for heaing loss, all the papers/links are just piece of writing there is no LIVING proof that it works on HUMAN.

Phi4sius is in contact by email with someone who experienced a 25db improvement with stem cells. We are still waiting for him to get ahold on the "before" and "after" audiograms as solid proof that it works! :D

Well said! I don't have a CI but I have seen the results in the kids I work with. I have seen kids who had some speech discrim before and some residual hearing who after the CI can speak and hear way better than they could before. When that is actually happening with stem cells I'd say go for it, but until then CI is what we have and it works.

Was their hearing worse than mine? If so, CI does offer a good chance of improvement. If I have any children, I won't touch CI, ill wait for stem cells to improve their hearing. They will still be young and catch up fast.

Wow...this whole quote is laughable. I'm searching for a way to hear again out of my left ear that will provide me with the absolute best hearing possible. So, I did the research, and took all opinions on this board into account when making my decision not to go for CI. Now that we've discovered evidence that stem cells for hearing loss having been experimented on in humans, AND proven to work in both humans and animals, all of you start attacking the very existence of it saying things like "Oh, I have no belief in stem cells until you provide scientific evidence". HELLO! There would be NO TRIALS whatsoever on human children unless they have a plethora of evidence available in OTHER COUNTRIES supporting the existence and functioning treatments available for the hearing loss cure! AND I can guarantee they already have some idea of what to expect when it comes to results!

It would help big time if you can get his audiogram(before and after). I believe you but there's alot of skeptics and nonbelivers here who need some solid proof.

There IS scientific evidence. I've provided the links - I've provided everything. Even on the link to safestemcells.org in my sig there are scientific papers talking about stem cells! NOT just press releases. Even the link I've posted before about researchers curing Blindness with the first stem cell therapy FOR age-related macular degeneration in the UK provides the scientific proof!

I accept your proof and am a big fan and believer of stem cells. :D

I realize there are other reasons as to why people would need CI - I'm certainly not discounting this fact. I just do not want anyone with enough residual hearing to buy into the marketing hype that is constantly perpetuated on this discussion forum about CIs when natural cures for hearing loss are on the horizon. Sure, the results are there. But at what cost? For me, I can't justify a surgery that has so many mixed results from implantation until there is a study with scientific proof that PROVES that I will be obtaining near normal hearing with CI in my other ear. For that, I can wait until stem cells arrive.

To be honest, ive seen a few that got CI who have so much residual hearing that I would be happy to pay $50,000 to have their residual hearing and they can have the CI with the $50,000 and give me their residual hearing that they will be giving up. Im hoping stem cells can give me as much residual hearing as those people gave up when getting CI. I have wonderful HAs and know alot about them and how to have them programmed properly so I hear my best. No CI will give you normal hearing, you must wait for stem cells.

Again, no one, especially me, is discounting the results of CI. I know it works to some VARYING degree in most people - but I'd like to see you provide scientific proof that it will work on ME without 1. Pulsating sounds, 2. Paralyzed face, and providing 3. My left ear will sound exactly like my right ear currently does providing a seamless hearing experience without a robotic sound, and 4. Won't even work AT ALL, which has happened in quite a few cases.

No one can predict or prove that CI will work on you. Everyone is different and results are all over the board, some excellent, some fair, some poor. CI is like rolling the dice, maybe youll hear better, maybe youll hear worse. Even my audiologist said the same. I might hear better, I might hear worse. But there's no going back to HAs. At least with stem cells, if it doesn't work, you still maintain your residual hearing and can wait for other techniques to improve/restore hearing. We discussed this and agreed theres over a dozen ways!

I know perfectly well that ALL of you anti stem cell folks will be the first in line to get your hearing restored using stem cells once it has been proven to work on many different people. We'll see who's the hypocrite then. Of course, I will be glad to bow down to the politics of this board, publically apologize, and then go for a CI in five years if the stem cell cure for sensorineural hearing loss has not moved any closer to final fruition by then. I'm certainly not going anywhere. ;) :cool2:

Many of them have said they wouldn't be interested and gave their reasons, of which the most popular is "I don't want to hear 24/7" others are culturally Deaf and would like to stay with their culture. They can make their choice, I respect their choice. Speaking for only myself, I can't see any major disadvantages to stem cells. I don't expect stem cells to give me normal hearing, but improve my hearing 20-40db so I won't hear 24/7 anyway but if I could have normal hearing, id take that in a heartbeat! The advantages far, far, far outweigh hearing 24/7! My brain will learn to tune out the noise like hearing people do.

Youll get your chance to be a pioneer in stem cells in around 3 years either in clinical trials or traveling overseas. You could get it in China now if you really wanted, although I suggest you wait a bit for stem cell technology to rapidly improve more. Perhaps email the China stem cell labs and attach your most recent audiogram and see what they say? If they can't help you now, ask when they can? Bet they say "very soon"

it seemed to me that one of the reasons you gave up on the CI was from some online "example" of what a CI sounds like.... dude, it makes sense if the CI sounded robotic at FIRST... but gradually over time, after enough MAPping sessions, the world sounds more natural, according to MANY CI users... not robotic but natural/normal. It just takes time for the brain to process all the information and make sense of it all!

It's a moot point since his CI insurance rejected him for having too much hearing in the good ear. He isn't about to spend $50,000 on CI when stem cells can offer so much more soon.

And seriously, do you think once you get the stem cell treatment, you'll hear like MAGIC and be able to cope with it all perfectly? I'd think those who have been deaf long enough will still have to struggle to make sense of all the new information coming into their brain... same thing with hearing aids, and any other technology out there that might help one to gain a sense of some sort. So don't just assume stem cell will be 100% perfect and you'll be 100% perfectly satisfied afterwards. It's still going to take TIME to get used to whatever treatment you've chosen.

I do ask that he have realistic expectations. I am expecting at least 20db improvement and may possibly attain a 40db improvement. I won't be hearing but rather ill be less deaf or HOH. Even in birds who have a wonderful natural ability to regenerate their hearing, they still were HOH and it was shown that the less residual hearing the birds had, the less hearing they recovered. I do think stem cells or some other procedure will eventually give us normal hearing but this could take much longer than today's stem cells that offers a partial improvement. Ill go for my partial improvement soon and wait 10-20 years for a complete improvement which should be possible by then.

I sure as hell won't be in that line. Seriously. I wouldn't want to be hearing 24/7, oh no.

Stem cells today or in the near future probably won't make anyone fully hearing so they won't be hearing 24/7 anyway. I expect stem cells to make me less deaf or HOH and with my HAs, give me hearing far better than CI with many other advantages, less cost, less risk.(see my blog, link in sig)

My replies countinued in next post below.
 
I have no wish to have stem cell, if i had the choice of being deaf or hearing i rather be deaf, I was born deaf, brought up in hearing world with few deaf friends and is happy this way. I have no desire to become hearing.

That is your choice and I respect this. I would like to be hearing or at least less deaf/HOH and my reasons are the same as those who got CI: to hear better. Instead of CI, I am getting stem cells because of all the advantages over CI.(see my blog, link in sig)

What is to say that the stem cells will grow into the hairs within the cochlea like what is found within a good healthy cochlea? Will they get the building instructions from within the cochlea that the already had the defective hair. This could mean that the new hair will be just as defective as what was already there.

Some hair cells is better than none! I could improve 20-40db!

Now just think if the stem cells mutate into some sort of thicker hair fiber that doesn't wiggle as much. Will that still give the right stimulation to the nerve to hear the sound as it really is or something different. Sounds like it could be much the same as a CI. What happens if it grows like weeds and fills up the cochlea. You may have bigger problems. To me, sounds like a CI may be more consistant in results than growing some hair fibers.

Less wiggle means elevated thresholds and this is exactly what I hear currently. Stem cells has been shown to create new hair cells and improve hearing threshold. The dosage of stem cells is given in small amounts so you avoid the problem of too many hair cells and risk hearing worse.

Thinking about stem cells, if this is something that gets injected into the cochlea, what is to say that all the stem cells will fall into the high frequency range area of the cochlea and little gets down to the lower frequency range. Now you still don't hear like you would dream of.

This would be good for me, I have no residual high frequency hearing.

I just think that for stem cells to become a realistic option, it is going to take years. For some on this forum who have already made up their mind, it seams like they still have residual hearing that they can fall back on. For me and others, there was no residual hearing to fall back on and for someone who has never heard through a CI nor received stem cell treatment to say that a CI offers less benefit than Stem cells will has not considered of the variables. All I can say is I hear through my CI the same sound range as I did when I was hearing with a normal audiogram.

Yea, 3-5 years or so for me to get into phase II clinical trials or travel overseas to another developed country. I can understand CI for those with no residual hearing, however im saving mine for stem cells. CI isn't a cure and doesn't come close to normal hearing. Stem cells offers the best chance plus all the other advantages.

I am NOT against stem cells at all! I would very much like stem cells would be a real choice RIGHT NOW.
(My 2yr-old son has a profound hearing loss and we are in the decision step wether to implant him or not. It is the most difficult dicision I've ever taken. He is getting SOME benefit from HAs, but besides he gives quite a few feedbacks with noises and sounds, he performs pretty poor with voice recognition/discrimination. Nevertheless we cannot state he is getting absolutely no benefit from the HAs...)
The point is that, besides what some of you are saying, the official scientific community is working hard on the stem cells field, but it is not possible to state when a real therapy will be available.
Make a search in PubMed, you'll find a lot of peer reviewed scientific papers dealing with that. I mean peer reviewd scientific papers, not commercial communications!!
Here below you can find a couple of examples of recent review on prestigious journals, dealing with that. I posted the abstracts, unfortunately the full text is under copyright and cannot be posted in a public forum. Especially the first one is from Nature Neuroscience, probably the most relevant source of information in this field.
It is clear that we are reasonably close to having a cure, but...

Obviously everybody is free to choose the route for himself!! Nobody would like to push for HAs, CIs, or whatever, a part from the correlated corporations...

I was born profoundly deaf and did fine. It won't be "too late" If I can wait, so can he. He will still be young when he gets stem cells and his elastic brain will adjust fast. I would never recommend CI to anyone who still derives some benefit from HAs!
 
I was born profoundly deaf and did fine. It won't be "too late" If I can wait, so can he. He will still be young when he gets stem cells and his elastic brain will adjust fast. I would never recommend CI to anyone who still derives some benefit from HAs!

I would like to be as sure as you are. I really do not know if he will still be young (or at least sufficiently young) when the stem cells will finally come...
If I were sure stem cells are around the corner, I would not have any doubt.
 
"In February, Humphries underwent another experimental stem cell treatment to regrow inner ear nerve hairs. It not only improved his hearing but helped him tolerate heat, which can be a problem for people with MS"
source: Alexandria native Humphries fights through MS to compete in Deep South golf tourney
September 2, 2009
Alexandria native Humphries fights through MS to compete in Deep South golf tourney | thetowntalk.com | The Town Talk

More press releases? It would seem with the amount of time you spend searching the web, you could manage to come up with a scientific research article or two.
 
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