Microbubble compositions, and methods for preparing and...

A - Human Necessities – 61 – K

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Details

A61K 49/00 (2006.01) A61B 8/00 (2006.01) A61K 9/127 (2006.01)

Patent

CA 2532324

Described are microbubble compositions including microbubbles having membranes that incorporate modified surface features that may be useful, for example, in facilitating binding to a target surface or substance. The surface features may include non-spherical attributes such as crenations, folds, projections, or wrinkles, which can increase the deformability of the microbubble membrane. Such microbubble compositions can be incorporated into targeted ultrasound contrast agents and methodologies. Methods for preparing modified microbubble compositions include providing microbubbles having spherical membranes, and converting the spherical membranes to non-spherical membranes having surface features as mentioned above. Targeting substances can be incorporated into the membranes before or after their conversion from spherical to non-spherical forms.

L'invention a trait à des compositions à base de microbulles, qui contiennent des microbulles possédant une membrane qui intègre des attributs de surface modifiée pouvant être utiles, par exemple, pour faciliter la fixation à une surface ou à une substance cible. Parmi les attributs de surface, on peut compter des attributs non sphériques tels que des crénelures, des plis, des saillies ou des rides, qui peuvent augmenter la déformabilité de la membrane des microbulles. De telles compositions à base de microbulles peuvent être intégrées à des milieux de contraste ultrasonores ciblés et à des méthodologies associées. L'invention concerne également des procédés de préparation de compositions à base de microbulles modifiées, qui consistent à fournir des microbulles possédant une membrane sphérique, et à transformer la membrane sphérique en une membrane non sphérique dotée d'attributs de surface tels ceux mentionnés ci-dessus. Des substances de ciblage peuvent être introduites dans la membrane avant ou après leur passage d'une forme sphérique à une forme non sphérique.

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