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	<title>Defeat Osteosarcoma &#187; osteosarcoma</title>
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	<link>http://defeatosteosarcoma.org</link>
	<description>This site is dedicated to curing osteosarcoma</description>
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		<title>Rational Therapeutics, Inc.  Personalized Cancer Treatment</title>
		<link>http://defeatosteosarcoma.org/2010/04/rational-therapeutics-inc-personalized-cancer-treatment/</link>
		<comments>http://defeatosteosarcoma.org/2010/04/rational-therapeutics-inc-personalized-cancer-treatment/#comments</comments>
		<pubDate>Wed, 07 Apr 2010 16:19:12 +0000</pubDate>
		<dc:creator>James Street</dc:creator>
				<category><![CDATA[Human osteosarcoma research]]></category>
		<category><![CDATA[osteosarcoma]]></category>
		<category><![CDATA[personalized cancer treatment]]></category>
		<category><![CDATA[personalized osteosarcoma treatment]]></category>

		<guid isPermaLink="false">http://defeatosteosarcoma.org/?p=190</guid>
		<description><![CDATA[Rational Therapeutics is dedicated to identifying unique characteristics of each cancer subtype, such as osteosarcoma, to enable oncologists to treat them with targeted therapies. Rational Therapeutics is directed by Dr. Robert A. Nagourney. Patients their oncologists can find out more about Dr. Nagourney’s work at: Rational Therapeutics Rational Theapeutics is located at: 750 E 29th [...]]]></description>
			<content:encoded><![CDATA[<p>Rational Therapeutics is dedicated to identifying unique characteristics of each cancer subtype, such as osteosarcoma, to enable oncologists to treat them with targeted therapies.</p>
<p>Rational Therapeutics is directed by Dr. Robert A. Nagourney.</p>
<p>Patients their oncologists can find out more about Dr. Nagourney’s work at:</p>
<p> <a href="http://www.rationaltherapeutics.com"> Rational Therapeutics </a></p>
<p>Rational Theapeutics is located at:</p>
<p>750 E 29th St., Long Beach, CA 90806, United States</p>
<p>(562)989-6455, (562)989-8160 fax, </p>
]]></content:encoded>
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		<item>
		<title>inactivation of SMO may be a useful approach to the treatment of patients with osteosarcoma</title>
		<link>http://defeatosteosarcoma.org/2010/03/inactivation-of-smo-may-be-a-useful-approach-to-the-treatment-of-patients-with-osteosarcoma/</link>
		<comments>http://defeatosteosarcoma.org/2010/03/inactivation-of-smo-may-be-a-useful-approach-to-the-treatment-of-patients-with-osteosarcoma/#comments</comments>
		<pubDate>Wed, 17 Mar 2010 04:07:14 +0000</pubDate>
		<dc:creator>James Street</dc:creator>
				<category><![CDATA[genetic research]]></category>
		<category><![CDATA[new osteosarcoma treatments]]></category>
		<category><![CDATA[osteosarcoma]]></category>
		<category><![CDATA[SMO]]></category>
		<category><![CDATA[SMO inactivation]]></category>

		<guid isPermaLink="false">http://defeatosteosarcoma.org/?p=177</guid>
		<description><![CDATA[The Hedgehog signaling pathway functions as an organizer in embryonic development. Recent studies have demonstrated constitutive activation of Hedgehog pathway in various types of malignancies. However, it remains unclear how Hedgehog pathway is involved in the pathogenesis of osteosarcoma. To explore the involvement of aberrant Hedgehog pathway in the pathogenesis of osteosarcoma, we investigated the [...]]]></description>
			<content:encoded><![CDATA[<p>The Hedgehog signaling pathway functions as an organizer in embryonic development. Recent studies have demonstrated constitutive activation of Hedgehog pathway in various types of malignancies.</p>
<p>However, it remains unclear how Hedgehog pathway is involved in the pathogenesis of osteosarcoma. To explore the involvement of aberrant Hedgehog pathway in the pathogenesis of osteosarcoma, we investigated the expression and activation of Hedgehog pathway in osteosarcoma and examined the effect of SMOOTHENED (SMO) inhibition.</p>
<p>Results: To evaluate the expression of genes of Hedgehog pathway, we performed real-time PCR and immunohistochemistry using osteosarcoma cell lines and osteosarcoma biopsy specimens.</p>
<p>To evaluate the effect of SMO inhibition, we did cell viability, colony formation, cell cycle in vitro and xenograft model in vivo. PCR revealed that osteosarcoma cells over-expressed Hedgehog, PTCH, SMO, and GLI.</p>
<p>Real-time PCR revealed over-expression of SMO, PTCH, and GLI2 in osteosarcoma biopsy specimens&#8217;. These findings showed that Hedgehog pathway is activated in osteosarcomas.</p>
<p>Inhibition of SMO by cyclopamine, a specific inhibitor of SMO, slowed the growth of osteosarcoma in vitro. Cell cycle analysis revealed that cyclopamine promoted G1 arrest.</p>
<p>Cyclopamine reduced the expression of accelerators of the cell cycle including cyclin D1, cyclin E1, SKP2, and pRb. On the other hand, p21cip1 protein was up-regulated by cyclopamine treatment.</p>
<p>In addition, knockdown of SMO by SMO shRNA prevents osteosarcoma growth in vitro and in vivo.</p>
<p>Conclusions: These findings suggest that inactivation of SMO may be a useful approach to the treatment of patients with osteosarcoma.</p>
<p>Author: Masataka HirotsuTakao SetoguchiHiromi SasakiYukihiro MatsunoshitaHui GaoHiroko NagaoOsamu KunigouSetsuro Komiya<br />
Credits/Source: Molecular Cancer 2010, 9:5</p>
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		<title>The Absurdities of Water Fluoridation</title>
		<link>http://defeatosteosarcoma.org/2010/03/the-absurdities-of-water-fluoridation/</link>
		<comments>http://defeatosteosarcoma.org/2010/03/the-absurdities-of-water-fluoridation/#comments</comments>
		<pubDate>Tue, 16 Mar 2010 05:24:54 +0000</pubDate>
		<dc:creator>James Street</dc:creator>
				<category><![CDATA[Flouridation and osteosarcoma]]></category>
		<category><![CDATA[Molecular Osteosarcoma Studies]]></category>
		<category><![CDATA[flouridation]]></category>
		<category><![CDATA[flouride]]></category>
		<category><![CDATA[osteosarcoma]]></category>
		<category><![CDATA[water flouridation]]></category>

		<guid isPermaLink="false">http://defeatosteosarcoma.org/?p=160</guid>
		<description><![CDATA[ater fluoridation is a peculiarly American phenomenon. It started at a time when Asbestos lined our pipes, lead was added to gasoline, PCBs filled our transformers and DDT was deemed so &#8220;safe and effective&#8221; that officials felt no qualms spraying kids in school classrooms and seated at picnic tables. One by one all these chemicals [...]]]></description>
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<td>ater fluoridation is a peculiarly American  phenomenon. It started at a time when Asbestos lined our pipes, lead was  added to gasoline, PCBs filled our transformers and DDT was deemed so  &#8220;safe and effective&#8221; that officials felt no qualms spraying kids in  school classrooms and seated at picnic tables. One by one all these  chemicals have been banned, but fluoridation remains untouched.</td>
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<td align="right">By Paul Connett, PhD</td>
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<p>Toronto adds poisonous fluoride to your drinking water. It&#8217;s a toxic  waste product and many health officials decry its use as causing bone  cancer, mottled teeth and for being ineffective at reducing cavities  when drunk.</p>
<p>Water fluoridation is a peculiarly American  phenomenon. It started at a time when Asbestos lined our pipes, lead was  added to gasoline, PCBs filled our transformers and DDT was deemed so  &#8220;safe and effective&#8221; that officials felt no qualms spraying kids in  school classrooms and seated at picnic tables. One by one all these  chemicals have been banned, but fluoridation remains untouched.</p>
<p>For  over 50 years US government officials have confidently and  enthusiastically claimed that fluoridation is &#8220;safe and effective&#8221;.  However, they are seldom prepared to defend the practice in open public  debate. Actually, there are so many arguments against fluoridation that  it can get overwhelming.</p>
<p>To simplify things it helps to separate  the ethical from the scientific arguments.</p>
<p>For those for whom  ethical concerns are paramount, the issue of fluoridation is very simple  to resolve. It is simply not ethical; we simply shouldn&#8217;t be forcing  medication on people without their &#8220;informed consent&#8221;. The bad news is  that ethical arguments are not very influential in Washington, DC unless  politicians are very conscious of millions of people watching them. The  good news is that the ethical arguments are buttressed by solid common  sense arguments and scientific studies which convincingly show that  fluoridation is neither &#8220;safe and effective&#8221; nor necessary. I have  summarized the arguments in several categories:</p>
<p>Fluoridation is  UNETHICAL because:</p>
<p>1) It violates the individual&#8217;s right to  informed consent to medication.<br />
2) The municipality cannot control  the dose of the patient.<br />
3) The municipality cannot track each  individual&#8217;s response.<br />
4) It ignores the fact that some people are  more vulnerable to fluoride&#8217;s toxic effects than others. Some people  will suffer while others may benefit.<br />
5) It violates the Nuremberg  code for human experimentation.</p>
<p>As stated by the recent recipient  of the Nobel Prize for Medicine (2000), Dr. Arvid Carlsson:</p>
<p>&#8220;I am quite convinced that water fluoridation, in a not-too-distant  future, will be consigned to medical history&#8230;Water fluoridation goes  against leading principles of pharmacotherapy, which is progressing from  a stereotyped medication &#8211; of the type 1 tablet 3 times a day &#8211; to a  much more individualized therapy as regards both dosage and selection of  drugs. The addition of drugs to the drinking water means exactly the  opposite of an individualized therapy.&#8221;</p>
<p>As stated by Dr. Peter  Mansfield, a physician from the UK and advisory board member of the  recent government review of fluoridation (McDonagh et al 2000):</p>
<p>&#8220;No physician in his right senses would prescribe for a person he has  never met, whose medical history he does not know, a substance which is  intended to create bodily change, with the advice: &#8216;Take as much as you  like, but you will take it for the rest of your life because some  children suffer from tooth decay. &#8216; It is a preposterous notion.&#8221;</p>
<p>Fluoridation  is UNNECESSARY because:</p>
<p>1) Children can have perfectly good  teeth without being exposed to fluoride.<br />
2) The promoters (CDC, 1999,  2001) admit that the benefits are topical not systemic, so fluoridated  toothpaste, which is universally available, is a more rational approach  to delivering fluoride to the target organ (teeth) while minimizing  exposure to the rest of the body.<br />
3) The vast majority of western  Europe has rejected water fluoridation, but has been equally successful  as the US, if not more so, in tackling tooth decay.<br />
4) If fluoride  was necessary for strong teeth one would expect to find it in breast  milk, but the level there is 0.01 ppm , which is 100 times LESS than in  fluoridated tap water (IOM, 1997).<br />
5) Children in non-fluoridated  communities are already getting the so-called &#8220;optimal&#8221; doses from other  sources (Heller et al, 1997). In fact, many are already being  over-exposed to fluoride.</p>
<p>Fluoridation is INEFFECTIVE because:</p>
<p>1)  Major dental researchers concede that fluoride&#8217;s benefits are topical  not systemic (Fejerskov 1981; Carlos 1983; CDC 1999, 2001; Limeback  1999; Locker 1999; Featherstone 2000).<br />
2) Major dental researchers  also concede that fluoride is ineffective at preventing pit and fissure  tooth decay, which is 85% of the tooth decay experienced by children  (JADA 1984; Gray 1987; White 1993; Pinkham 1999).<br />
3) Several studies  indicate that dental decay is coming down just as fast, if not faster,  in non-fluoridated industrialized countries as fluoridated ones  (Diesendorf, 1986; Colquhoun, 1994; World Health Organization, Online).<br />
4)  The largest survey conducted in the US showed only a minute difference  in tooth decay between children who had lived all their lives in  fluoridated compared to non-fluoridated communities. The difference was  not clinically significant nor shown to be statistically significant  (Brunelle &amp; Carlos, 1990).<br />
5) The worst tooth decay in the United  States occurs in the poor neighborhoods of our largest cities, the vast  majority of which have been fluoridated for decades.<br />
6) When  fluoridation has been halted in communities in Finland, former East  Germany, Cuba and Canada, tooth decay did not go up but continued to go  down (Maupome et al, 2001; Kunzel and Fischer, 1997, 2000; Kunzel et al,  2000 and Seppa et al, 2000).</p>
<p>Fluoridation is UNSAFE because:</p>
<p>1)  It accumulates in our bones and makes them more brittle and prone to  fracture. The weight of evidence from animal studies, clinical studies  and epidemiological studies on this is overwhelming. Lifetime exposure  to fluoride will contribute to higher rates of hip fracture in the  elderly.<br />
2) It accumulates in our pineal gland, possibly lowering the  production of melatonin a very important regulatory hormone (Luke,  1997, 2001).<br />
3) It damages the enamel (dental fluorosis) of a high  percentage of children. Between 30 and 50% of children have dental  fluorosis on at least two teeth in optimally fluoridated communities  (Heller et al, 1997 and McDonagh et al, 2000).<br />
4) There are serious,  but yet unproven, concerns about a connection between fluoridation and  osteosarcoma in young men (Cohn, 1992), as well as fluoridation and the  current epidemics of both arthritis and hypothyroidism.<br />
5) In animal  studies fluoride at 1 ppm in drinking water increases the uptake of  aluminum into the brain (Varner et al, 1998).<br />
6) Counties with 3 ppm  or more of fluoride in their water have lower fertility rates (Freni,  1994).<br />
7) In human studies the fluoridating agents most commonly used  in the US not only increase the uptake of lead into children&#8217;s blood  (Masters and Coplan, 1999, 2000) but are also associated with an  increase in violent behavior.<br />
 <img src='http://defeatosteosarcoma.org/wp-includes/images/smilies/icon_cool.gif' alt='8)' class='wp-smiley' /> The margin of safety between the  so-called therapeutic benefit of reducing dental decay and many of these  end points is either nonexistent or precariously low.</p>
<p>Fluoridation  is INEQUITABLE, because:</p>
<p>1) It will go to all households, and  the poor cannot afford to avoid it, if they want to, because they will  not be able to purchase bottled water or expensive removal equipment.<br />
2)  The poor are more likely to suffer poor nutrition which is known to  make children more vulnerable to fluoride&#8217;s toxic effects (Massler &amp;  Schour 1952; Marier &amp; Rose 1977; ATSDR 1993; Teotia et al, 1998).<br />
3)  Very rarely, if ever, do governments offer to pay the costs of those  who are unfortunate enough to get dental fluorosis severe enough to  require expensive treatment.</p>
<p>Fluoridation is INEFFICIENT and NOT  COST-EFFECTIVE because:</p>
<p>1) Only a small fraction of the water  fluoridated actually reaches the target. Most of it ends up being used  to wash the dishes, to flush the toilet or to water our lawns and  gardens.<br />
2) It would be totally cost-prohibitive to use  pharmaceutical grade sodium fluoride (the substance which has been  tested) as a fluoridating agent for the public water supply. Water  fluoridation is artificially cheap because, unknown to most people, the  fluoridating agent is an unpurified hazardous waste product from the  phosphate fertilizer industry.<br />
3) If it was deemed appropriate to  swallow fluoride (even though its major benefits are topical not  systemic) a safer and more cost-effective approach would be to provide  fluoridated bottle water in supermarkets free of charge. This approach  would allow both the quality and the dose to be controlled. Moreover, it  would not force it on people who don&#8217;t want it.</p>
<p>Fluoridation is  UNSCIENTIFICALLY PROMOTED. For example:</p>
<p>1) In 1950, the US Public  Health Service enthusiastically endorsed fluoridation before one single  trial had been completed.<br />
2) Even though we are getting many more  sources of fluoride today than we were in 1945, the so called &#8220;optimal  concentration&#8221; of 1 ppm has remained unchanged.<br />
3) The US Public  health Service has never felt obliged to monitor the fluoride levels in  our bones even though they have known for years that 50% of the fluoride  we swallow each day accumulates there.<br />
4) Officials that promote  fluoridation never check to see what the levels of dental fluorosis are  in the communities before they fluoridate, even though they know that  this level indicates whether children are being overdosed or not.<br />
5)  No US agency has yet to respond to Luke&#8217;s finding that fluoride  accumulates in the human pineal gland, even though her finding was  published in 1994 (abstract), 1997 (Ph. D. thesis), 1998 (paper  presented at conference of the International Society for Fluoride  Research), and 2001 (published in Caries Research).<br />
6) The CDC&#8217;s  1999, 2001 reports advocating fluoridation were both six years out of  date in the research they cited on health concerns.</p>
<p>Fluoridation  is UNDEFENDABLE IN OPEN PUBLIC DEBATE.</p>
<p>The proponents of water  fluoridation refuse to defend this practice in open debate because they  know that they would lose that debate. A vast majority of the health  officials around the US and in other countries who promote water  fluoridation do so based upon someone else&#8217;s advice and not based upon a  first hand familiarity with the scientific literature. This second hand  information produces second rate confidence when they are challenged to  defend their position. Their position has more to do with faith than it  does with reason.</p>
<p>Those who pull the strings of these public  health &#8216;puppets&#8217;, do know the issues, and are cynically playing for time  and hoping that they can continue to fool people with the recitation of  a long list of &#8220;authorities&#8221; which support fluoridation instead of  engaging the key issues. As Brian Martin made clear in his book  Scientific Knowledge in Controversy: The Social Dynamics of the  Fluoridation Debate (1991), the promotion of fluoridation is based upon  the exercise of political power not on rational analysis. The question  to answer, therefore, is: &#8220;Why is the US Public Health Service choosing  to exercise its power in this way?&#8221;</p>
<p>Motivations &#8211; especially  those which have operated over several generations of decision makers &#8211;  are always difficult to ascertain. However, whether intended or not,  fluoridation has served to distract us from several key issues. It has  distracted us from:</p>
<p>a) The failure of one of the richest  countries in the world to provide decent dental care for poor people.<br />
b)  The failure of 80% of American dentists to treat children on Medicaid.<br />
c)  The failure of the public health community to fight the huge over  consumption of sugary foods by our nation&#8217;s children, even to the point  of turning a blind eye to the wholesale introduction of soft drink  machines into our schools. Their attitude seems to be if fluoride can  stop dental decay why bother controlling sugar intake.<br />
d) The failure  to adequately address the health and ecological effects of fluoride  pollution from large industry. Despite the damage which fluoride  pollution has caused, and is still causing, few environmentalists have  ever conceived of fluoride as a &#8216;pollutant.&#8217;<br />
e) The failure of the US  EPA to develop a Maximum Contaminant Level (MCL) for fluoride in water  which can be scientifically defended.<br />
f) The fact that more and more  organofluorine compounds are being introduced into commerce in the form  of plastics, pharmaceuticals and pesticides. Despite the fact that some  of these compounds pose just as much a threat to our health and  environment as their chlorinated and brominated counterparts (i.e. they  are highly persistent and fat soluble and many accumulate in the food  chains and our body fat), those organizations and agencies which have  acted to limit the wide-scale dissemination of these other halogenated  products, seem to have a blind spot for the dangers posed by  organofluorine compounds.</p>
<p>So while fluoridation is neither  effective nor safe, it continues to provide a convenient cover for many  of the interests which stand to profit from the public being misinformed  about fluoride.</p>
<p>Unfortunately, because government officials have  put so much of their credibility on the line defending fluoridation, it  will be very difficult for them to speak honestly and openly about the  issue. As with the case of mercury amalgams, it is difficult for  institutions such as the American Dental Association to concede health  risks because of the liabilities waiting in the wings if they were to do  so.</p>
<p>However, difficult as it may be, it is nonetheless essential  &#8211; in order to protect millions of people from unnecessary harm &#8211; that  the US Government begin to move away from its anachronistic, and  increasingly absurd, status quo on this issue. There are precedents.  They were able to do this with hormone replacement therapy.</p>
<p>But  getting any honest action out of the US Government on this is going to  be difficult. Effecting change is like driving a nail through wood &#8211;  science can sharpen the nail but we need the weight of public opinion to  drive it home. Thus, it is going to require a sustained effort to  educate the American people and then recruiting their help to put  sustained pressure on our political representatives. At the very least  we need a moratorium on fluoridation (which simply means turning off the  tap for a few months) until there has been a full Congressional hearing  on the key issues with testimony offered by scientists on both sides.  With the issue of education we are in better shape than ever before.  Most of the key studies are available on the internet and there are  videotaped interviews with many of the scientists and protagonists whose  work has been so important to a modern re-evaluation of this issue.</p>
<p>With  this new information, more and more communities are rejecting new  fluoridation proposals at the local level. On the national level, there  have been some hopeful developments as well, such as the EPA  Headquarters Union coming out against fluoridation and the Sierra Club  seeking to have the issue re-examined. However, there is still a huge  need for other national groups to get involved in order to make this the  national issue it desperately needs to be.</p>
<p>I hope that if there  are RFW readers who disagree with me on this, they will rebut these  arguments. If they can&#8217;t than I hope they will get off the fence and  help end one of the silliest policies ever inflicted on the citizens of  the US. It is time to end this folly of water fluoridation without  further delay. It is not going to be easy. Fluoridation represents a  very powerful &#8220;belief system&#8221; backed up by special interests and by  entrenched governmental power and influence.</p>
<p>Paul Connett. All  references cited can be found at <a href="http://www.slweb.org/bibliography.html">http://www.slweb.org/bibliography.html</a></p>
<p>All  references cited can be found at  http://www.slweb.org/bibliography.html</td>
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<p>2010-03-15 16:44:47</p>
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		<title>Bone implants that support and release chemotherapeutical agents in ciclodextrin nanocapsule</title>
		<link>http://defeatosteosarcoma.org/2010/03/bone-implants-that-support-and-release-chemotherapeutical-agents-in-ciclodextrin-nanocapsule/</link>
		<comments>http://defeatosteosarcoma.org/2010/03/bone-implants-that-support-and-release-chemotherapeutical-agents-in-ciclodextrin-nanocapsule/#comments</comments>
		<pubDate>Tue, 16 Mar 2010 05:17:43 +0000</pubDate>
		<dc:creator>James Street</dc:creator>
				<category><![CDATA[Bone repair]]></category>
		<category><![CDATA[Human osteosarcoma research]]></category>
		<category><![CDATA[bone repair]]></category>
		<category><![CDATA[nanotechnology]]></category>
		<category><![CDATA[osteosarcoma]]></category>

		<guid isPermaLink="false">http://defeatosteosarcoma.org/?p=157</guid>
		<description><![CDATA[15. March 2010 06:35 For the localized treatment of tumors Bone implants with the ability to carry chemotherapeutical drugs in conception in CICECO Chemotherapy, followed by the surgical removal of the affected tissue is the treatment usually adapted to bone tumors. An implant which can fill the areas of subtraction, while releasing chemotherapeutical agents locally, [...]]]></description>
			<content:encoded><![CDATA[<p>15. March 2010 06:35</p>
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<p>For the localized treatment of tumors</p>
<p>Bone implants with the ability to carry chemotherapeutical drugs in  conception in CICECO</p>
<p><a href="http://www.news-medical.net/health/What-is-Chemotherapy.aspx">Chemotherapy</a>,  followed by the surgical removal of the affected tissue is the  treatment usually adapted to bone tumors. An implant which can fill the  areas of subtraction, while releasing chemotherapeutical agents locally,  in a controlled manner, during the treatment period, is the aim of a  research led by the Research Centre in Ceramic Material and Composites  (CICECO/UA). In these experiences, specialists are using potential  &#8220;anti-tumor&#8221; drugs coated by nanocapsules.</p>
<p>The <a href="http://www.news-medical.net/health/What-is-Osteosarcoma.aspx">osteosarcoma</a> is the most common malignant primary bone tumor. Its major incidence is  in children and youngsters and usually involves the amputation of arms  and legs. The treatment for this type of tumor implies <a href="http://www.news-medical.net/health/What-is-Chemotherapy.aspx">chemotherapy</a>,  followed by the surgical removal of the affected tissue with a safety  area, in order to avoid the tumor&#8217;s reappearance. This area is then  filled with a bone or synthetic biomaterial implant.</p>
<p>Considering how important it is to avoid repeating new chemo or <a href="http://www.news-medical.net/health/What-is-Radiation-Therapy.aspx">radiotherapy</a> treatments in these cases when neutralizing possible residual focus, 11  researchers from the Universities of Aveiro and Coimbra intend to  develop an implant which can contain chemotherapeutical agents of  specific ranges of action, and also release these components in a  controlled manner for a specific and adequate period of time.</p>
<p>&#8220;The bone implants we are studying will serve as a support and  releasing agent of capsulated drugs in a ciclodextrin nanocapsule. We  are currently experimenting with an active molecule with anti-<a href="http://www.news-medical.net/health/What-is-Cancer.aspx">cancer</a> properties specifically directed to osteosarcomas. Nevertheless, it is  intended to broaden its application to other types of <a href="http://www.news-medical.net/health/What-is-Cancer.aspx">cancer</a>&#8220;.</p>
<p>For this person, and as explained by Prof. Rui Correia, project  coordinator, there is the need to proceed with the study of its mechanic  and biological characteristics. &#8220;When we develop projects for these  purposes, we must bear in mind their mechanic resistance, as well as  other characteristics which must be taken in consideration when  performing its implant in the bone. In this specific case, we are  working with porous supports that contain a silica gel, manipulated to  function both as a nanocapsule deposit and releaser. Its physical form  will vary according to the bone area to fill.</p>
<p>The gel matrix will receive the anti-tumor compost (cisplatin and  metallic composts), capsulated at a molecular level with ciclodextrin,  coloured gello capsules which are nothing more and nothing less that  sugar rings.</p>
<p>Prof. Ana Gil explains this innovative technique:</p>
<p>&#8220;A subgroup within our team, lead by researcher Susana Braga, is by  the one hand, developing new metallic composts with a therapeutic  potential and, by the other hand, promoting its capsulation in  ciclodextrins. The use of the ciclodextrin on the coating of the  medicinal molecule increases the efficiency of the drug and reduces the  necessary amount. To work at a nanometric scale allows us to improve the  properties, both concerning its solubility and its range of activity,  allowing us to make it more specific&#8221;.</p>
<p>The nanocapsule protects the therapeutic agent from the contact with  proteins which are irrelevant to the treatment and makes its located  application simpler. The use of ciclodextrins as nanocapsules should  protect the organism from the expected high toxicity of the new agents  to the healthy cells.</p>
<p>This project, financed by the foundation for the Science and  Technology, also presents an innovative aspect in what concerns the  study of the metabolic effects of the new compounds (capsulated or not)  on the human <a href="http://www.news-medical.net/health/What-is-Osteosarcoma.aspx">osteosarcoma</a> cells, as explained by the researcher: &#8220;It is important to know the  response of the <a href="http://www.news-medical.net/health/What-is-Cancer.aspx">cancer</a> cells to the drugs, in order to be able to adjust and adapt the drug&#8217;s  nature and dosage, for an effective treatment. These studies use the  spectroscopy of the RMN- Magnetic Nuclear Resonance in the  characterization of the cells&#8217; metabolic profile and the application of  adequate statistic treatments, which help identifying specific metabolic  changes and their relation with the patterns of cellular death&#8221;.</p>
<p>With the drug in nanocapsules, there will be two types of implants to  choose from: permanent titanium and biodegradable (for regenerative  purposes) implants. The differences between these two are clarified by  Prof. Rui Correia: &#8220;The porous supports which will allow the  introduction of a chemic component in the organism are conceived from  two types of biomaterials: a bio-stable one (non-degradable and  biocompatible) and a polymeric, with biodegradable characteristics. The  first one will be used in cases where there is a lack of ability to  regenerate the bone tissue and the second in situations where there is  the probability of a full natural recovery of the bone. In this last  case the implant will be absorbed and progressively replaced by the  natural bone&#8221;.</p>
<p>Besides the microstructural analysis, the researchers are proceeding  with mechanic, physics and chemistry and in vitro rehearsals. There will  also be performed metabolomics essays with cellular cultures which are  subjected to the therapeutic agents, either molecularly encapsulated or  not.</p>
<p>SOURCE Research Centre in Ceramic Material and Composites</p>
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