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RNAi a cure?
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08/02/2005 23:55
David Land

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08/02/2005 23:55
David Land

not registered

RNAi a cure?

The science of RNAi is very new. It was only discovered about six years ago. What is this new science? In short, it is a biochemical interference of genetic DNA instructions. To my knowledge, RNAi has only been used to date to reverse immaculate degeneration of the eye (all experimental). This eye disease occurs when a flawed gene produces excess RNA/ or modified RNA to tell the eye to manufacture more blood vessels than it would normally. A mirrored DNA gene is implanted in the cell and when RNA for eye vessels reaches its destination it is destroyed. In essence, all instructions via RNA to produce blood vessels in the eye are destroyed and the disease is halted. To my knowledge, this procedure has halted the eye disease by about 80 percent in a very small sample.

It could work the same for Dups Contracture. In fact, an almost perfect disease for testing the science of RNAi. Basically, what is needed is to find the gene for collagen production. I suspect this gene may already have been discovered. After that the science is very similar to the above example.

As a trained biochemist, I have doubts that collangenase will be successful due to the many controlling parameters such as pH, temp, degradation, specificity, etc. ...although, I would continue with the research. I think this is the first time that RNAi science has been advocated for DC and I suspect you will hear a lot more about it in the future.

08/02/2005 23:03
Patty

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08/02/2005 23:03
Patty

not registered

RNAi

I would like to hear more about this. There has to be some new studies to look into DC. It is just that it is not a priority at this time, and not important to the powers that be. Man, if they can Clone some dog, they should be able to isolate this DC gene.
It is so weird, that people that have it, don't even know it. I saw a friend the other day for lunch, and she has had foot problems...I looked at her hands, and low and behold, there it was Cords in both hands. She did not have a clue. She is an avid golfer. It is just that I have had the trama on the hands, and now I have the stiffness. I do think though, that she will get that at some point.
I would like to hear more about the RNAi, but, I don't believe it is a cure. Mind is open.
Patty

08/03/2005 23:29
David Land

not registered

08/03/2005 23:29
David Land

not registered

I might add that ....

Scientists who are familiar with RNAi technology believe almost all genetic based diseases can be cured using RNAi interference....from many forms of cancer to genetic heart disease and everything in between genetically based. DC is genetically based and this technology treats it at its fundamental roots.

08/03/2005 23:46
Randy H.

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08/03/2005 23:46
Randy H.

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Long Term Hope

That *sounds* great, but knowing how hard it is to get the FDA to approve of *anything*, what your talking about is got to be ten years away, if not more. There's a lot of hoops to jump through implied in your discussion. However, it's nice to know there is long term hope. I'm planing on treading water with NA until something like this becomes a reality.

08/17/2005 23:41
David

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08/17/2005 23:41
David

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More on RNAi

Take a look at this link:
http://www.pbs.org/wgbh/nova/sciencenow/3210/02.html
and then go on to the following:
http://www.pbs.org/wgbh/nova/sciencenow/3210/02-cure.html

For a "cure" to DC it will have to come from basic biochemistry, not just the NA band aid procedure.

08/17/2005 23:31
Randy H.

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08/17/2005 23:31
Randy H.

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Band-Aid

Thanks David, but...

".................researchers are optimistic that many RNAi therapies will enter *clinical* trials in the next *five* years and *possibly* get FDA approval in the next *decade*."

Yes, exciting, but we'll need the Band-Aid for some time to come. Is there anything to indicate otherwise?

08/18/2005 23:26
Wolfgang Wach

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08/18/2005 23:26
Wolfgang Wach

not registered

RNAi as therapy

Hi David and Randy,

I guess we all agree that a real cure of Dupuytren requires a new approach and RNA interference has a very good potential for that. But, as Randy already pointed out, it will take quite a long time to become a therapy.

With regard to RNAi as therapy for Dupuytren I am even less optimistic with respect to the time frame. The reason is that not only doesn't seem to be any active research ongoing regarding an application for Dupuytren but, on top of that, we don't yet understand in enough detail why and how Dupuytren nodules grow. Certainly there is a genetic aspect but that obviously is only part of the truth. If you consider questions like: why is it not strictly inherited? why is it not affecting all fingers? why do many people get it only on one hand? why do some (but only few) also get Ledderhose? why do woman get it later than men? why is in some cases surgery or an accident triggering the disease? why are so strong variations in the growth rate? On a lower level we probably assume that macrophags are becoming fibroblasts but why suddenly in large quantities? These questions show that we are far from understanding the biological mechanism of Dupuytren.

I guess we first need to understand Dupuytren better (at least the basic processes) before we can start developing a RNAi therapy. Or am I wrong abut that? At least that is the reason why I am even less optimistic about the time frame. On the other hand, if I understand it right, one of the key issues of RNAi is how to get the substance intact to the right place in the body. And there I agree with David: for Dupuytren you know exactly where you need it and it is right under the skin. Applying it would be as simply as NA or collagenase.

For the time beeing NA is a good band aid (though the outcome obviously is not always as satisfying as hoped for, some report infection or quick recurrence but that's a reasonably risk compared to surgery). Personally I consider radiotherapy a more fundamental approach because it stops the collagen accumulation, disolves small nodules and avoids recurrence (not always but often). It is easy to administer and painless. But, as Randy already pointed out, probably only available in Germany.

Still, RNAi is a fascinating way to address Dupuytren.

Wolfgang

08/18/2005 23:54
BobN 
08/18/2005 23:54
BobN 
RNA gene research for Dup~sq~s

Hi All,

Wolfgang and Randy make some good points so I thought (I would search for papers published on cell level research to see what's going on.

Using Google I did a quick search for:
"+Dupuytren's gene nucleus abstract"

Many articles show up, but one caught my attention that I thought I'd share. I think this shows that there is RNA and cellular level research on Dupuytren's happening. SInce I suffer from 4 out of ??(maybe more) types of this disorder (Dup's, knuckles, feet, peyronies), this one caught my attention first....

I will look for more gene-based research, but I don't have access to the full text (everyone wants $20 to read them).

Bob
Here it is ----------------
Identification of a Novel Mitochondrial Mutation in Dupuytren's Disease Using Multiplex DHPLC.
Plastic & Reconstructive Surgery. 115(1):134-141, January 2005.
Bayat, Ardeshir Ph.D., M.R.C.S.(Eng.), A.F.R.C.S.(Ed.); Walter, Joanne B.Sc.(Hons.); Lambe, Helen B.Sc.(Hons.); Watson, James S. M.R.C.P., F.R.C.S.(Eng.); Stanley, John K. M.Ch.(Orth.), F.R.C.S.(Eng.Ed.); Marino, Michael Ph.D.; Ferguson, Mark W. J. Ph.D., F.F.D., F.Med.Sci., C.B.E.; Ollier, William E. R. Ph.D., F.I.B.M.S., F.R.C.Path.
Abstract:
Dupuytren's disease is a familial fibroproliferative disorder of late onset affecting the hands. It is extremely common in individuals of Northern European extraction. Genetic studies have yet to identify the genes involved in the formation of the disease. Mitochondria play a critical role in cell metabolism and apoptosis. It is known that defective mitochondria generate abnormally high levels of reactive oxygen species by means of electron leak and that antioxidant enzyme activities decrease with age in skin fibroblasts. Respiratory function of mitochondria is also impaired in aging human tissues. Oxidative stress and production of free radicals may be important factors in the pathogenesis of Dupuytren's disease. Mitochondrial genes are also included in the regulation of apoptosis. Diseased tissue contains large numbers of myo-fibroblasts, which disappear by apoptosis during normal wound healing. High numbers of mitochondria have been observed in fibroblasts derived from diseased tissue. In the light of this evidence, the MITOCHONDRIAL GENOME REPRESENTS A POTENTIAL LOCATION FOR CANDIDATE SUSCEPTIBILITY GENES for this late-onset disorder. In this study, the authors in vestigated the presence of mutations within the mitochondrial genome in 40 subjects; 20 Caucasian Dupuytren's disease patients with a maternally transmitted inheritance pattern and 20 control subjects were matched for age, sex, and race using a multiplex denaturing high-performance liquid chromatography approach. A HITHERTO UNKNOWN heteroplasmic mutation located within the mitochondrial 16s rRNA region WAS EVIDENT IN 90 PERCENT of patients and absent from all control subjects (p < 0.001; [chi]2 = 16.1). This mutation MAY be important in the pathogenesis of Dupuytren's disease.

(C)2005American Society of Plastic Surgeons


08/22/2005 23:26
Wolfgang Wach

not registered

08/22/2005 23:26
Wolfgang Wach

not registered

genetic root cause

Hey Bob, good find! It sounds like that they possibly identified an involved gene.

Wolfgang

08/23/2005 23:43
BobN 
08/23/2005 23:43
BobN 
RNA gene research for Dup~sq~s

Wolfgang (and everyon else),
There are a few other interesting research projects going on as well. Take a peek using google using:

"Dupuytren's rna nucleus abstract" search terms.

Some tough reading, but you get the drift of what they are doing. We can only hope it's at least there for our kids when they need it. Could be for us one day with some luck.
Happy reading.

Bob

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fibroblasts   Mitochondria   pathogenesis   experimental   Mitochondrial   chromatography   myo-fibroblasts   disease   instructions   understanding   high-performance   5-fluorouracil   Reconstructive   Identification   interference   heteroplasmic   research   SUSCEPTIBILITY   Dupuytren   fibroproliferative