Compositions comprising fetal hemoglobin and bacterial...

A - Human Necessities – 61 – K

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Details

A61K 38/00 (2006.01) A61K 35/407 (2006.01) A61K 35/74 (2006.01) A61K 38/17 (2006.01) A61K 38/42 (2006.01) A61K 39/02 (2006.01) A61P 35/00 (2006.01) A61P 37/00 (2006.01)

Patent

CA 2514485

The present invention relates to a pharmaceutical composition representing a novel immunomodulating principle comprising bacterial endotoxin, fetal hemoglobin or more particularly a heme-free derivative or the .gamma.-chain thereof, and optionally, components which are present in the fetal liver in addition to HbF. The composition is delivered to humans in a pharmaceutically acceptable carrier and/or diluent. In accordance with the present invention it was surprisingly found that endotoxin and fetal hemoglobin partial structures display a pronounced synergistic biomedical activity. The biomedical effect of fetal hemoglobin and its partial structures is surprisingly not based on a classical hemoglobin function as an oxygen transporter but related to a modulation of endotoxin-mediated bioactivity. This biomedical activity is surprisingly also observed after oral application of the composition. The composition of the invention finds a variety of applications which have in common the stimulation of the immune system and the reversion in polarization of cytokines and chemokines from a Th2-directed response to a Th1-type response. The proposed applications would therefore include the treatment of allergic conditions, malignancies, chronic infections, autoimmune phenomena and age-related imbalances.

La présente invention concerne une composition pharmaceutique qui constitue un nouveau principe immunomodulateur, contenant une endotoxine bactérienne, de l'hémoglobine foetale ou plus précisément un dérivé sans hème ou sa chaîne .gamma., et éventuellement des éléments hépatiques foetaux en plus de l'hémoglobine foetale. Cette composition est administrée aux humains dans un support et/ou un diluant de qualité pharmaceutique. Selon la présente invention, il s'est avéré que des structures partielles d'une endotoxine et de l'hémoglobine foetale présentent une activité biomédicale synergique. Etonnamment, l'effet biomédical de l'hémoglobine foetale et de ses structures partielles ne repose pas sur une fonction classique de l'hémoglobine comme transporteur d'oxygène, mais est associé à une modulation de la bioactivité induite par l'endotoxine. Cette activité biomédicale apparaît également de manière étonnante après administration par voie orale de la composition. Cette composition peut être utilisée dans de nombreuses applications ayant en commun la stimulation du système immunitaire et l'inversion de la polarisation des cytokines et des chimiokines d'une réponse Th2 vers une réponse de type Th1. Ces applications comprennent, notamment, le traitement de troubles allergiques, de tumeurs malignes, d'infections chroniques, de phénomènes auto-immuns et de déséquilibres liés à l'âge.

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