発表自体は、昨年の11月17日に行われたようですので、さほど新しいというわけではないのですが…、ちょっと変わったアプローチをしているようなんです…。
このSitavirですが、実は粘膜付着性口腔錠剤(mucoadhesive buccal tablet)というものらしく、平たく言えば…、
「口の中に含んで、口の粘膜から薬剤を患部に浸透させていく」
というもののようです。
結構効果は高いようでして、
- 口に含んでから30分以内でアシクロビルの集積が唾液腺や口腔内粘膜に確認された
- その集積は24時間にわたり確認された
ということのようです。
これは、すなわち、
- 口唇ヘルペスの症状が出だしてからすぐにSitavirを服用する
- そうすると、30分以内に効き始め、その効果も24時間は継続する
ということになると考えられます。
これは、Sitavir 50mgを発症時に1回服用したことによる結果であり、治験に参加した700名の被験者で確認されたようです。
今回の情報は、HSV1に関するものですが、将来的にHSV2でも応用されてくれば頼もしい限りですね!
BioAlliance Pharma presents pharmacokinetic results of its Sitavir® (acyclovir Lauriad®)At the FIP Pharmaceutical Sciences World Congress (PSWC) 2010 in association with the AAPS Annual Meeting and Exposition (November 14-18, 2010, New Orleans, Louisiana, USA)
http://www.bioalliancepharma.com/eng/content/download/8213/94994/version/1/file/101117EN_AAPS%20Acyclovir.pdf
Paris, November 17, 2010 – BioAlliance Pharma SA (Euronext Paris – BIO), a company dedicated to the supportive care and treatment of cancer patients, presented the results of the pharmacokinetic study on its Sitavir® (acyclovir Lauriad® 50mg), developed for the treatment of recurrent oro-facial herpes, at the “FIP Pharmaceutical Sciences World Congress (PSWC) 2010 in association with the AAPS (American Association of Pharmaceutical Scientists) Annual Meeting and Exposition”.
This pharmacokinetic study showed that after one single application of Sitavir® mucoadhesive buccal tablet, acyclovir concentrations in saliva and labial mucosa were rapidly detected (within 30 minutes). These concentrations on the muco-cutaneous infection site have been sustained over 24 hours whereas plasma concentrations were very low. These results support the administration of one single dose of Sitavir® as soon as the first oro-facial herpes infection symptoms or signs occur. The efficacy of one single dose of Sitavir® for the treatment of recurrent oro-facial herpes has been confirmed in the pivotal phase III clinical trial including over 700 patients.
“These data confirm the interest of mucosal targeting obtained with our mucoadhesive buccal Lauriad® technology”, comments Dominique Costantini, Chief Executive Officer of BioAlliance Pharma. “This technology, protected by several families of patents over the long term, has enabled us to develop two innovative products: Loramyc® (Oravig® in the US), dedicated to the treatment of oropharyngeal fungal infections and registered in 28 countries, and Sitavir®, dedicated to the treatment of recurrent herpes labialis infections whose registration dossier submission is planned in 2011. Today, with two other innovative products already in clinical phase, fentanyl Lauriad® and clonidine Lauriad®, BioAlliance is capitalizing on its mucosal know-how and on the good tolerance observed. The company is accelerating the development of products in new markets, opening the path to additional revenues”.
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