Composite microneedle array including nanostructures thereon
First Claim
1. A composite microneedle array comprisinga microneedle assembly that includes a plurality of microneedles;
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Accused Products
Abstract
Composite microneedle arrays including microneedles and a film overlaying the microneedles are provided. The film includes a plurality of nano-sized structures fabricated thereon. Devices may be utilized for interacting with a component of the dermal connective tissue. A random or non-random pattern of structures may be fabricated such as a complex pattern including structures of differing sizes and/or shapes. Devices may be beneficially utilized for delivery of an agent to a cell or tissue. Devices may be utilized to directly or indirectly alter cell behavior through the interaction of a fabricated nanotopography with the plasma membrane of a cell and/or with an extracellular matrix component.
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Citations
39 Claims
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1. A composite microneedle array comprising
a microneedle assembly that includes a plurality of microneedles; - and
a film overlaying at least one microneedle of the microneedle assembly, the film having a first surface and a second surface, wherein the first surface of the film is adhered to the microneedle and at least partially conforms thereto, the film comprising a plurality of nanostructures that are arranged in a predetermined pattern on the second surface of the film to project outward from the second surface of the film, and wherein at least a portion of the nanostructures have a cross-sectional dimension of less than 500 nanometers and greater than 5 nanometers, a height of from 10 nanometers to 1 micrometer, and an aspect ratio of from 0.2 to 5. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A transdermal patch comprising a composite microneedle array, which comprises
a microneedle assembly that includes a plurality of microneedles; - and
a film overlaying at least one microneedle of the microneedle assembly, the film having a first surface and a second surface, wherein the first surface of the film is adhered to the microneedle and at least partially conforms thereto, the film comprising a plurality of nanostructures that are arranged in a predetermined pattern on the second surface of the film to project outward from the second surface of the film, and wherein at least a portion of the nanostructures have a cross-sectional dimension of less than 500 nanometers and greater than 5 nanometers, a height of from 10 nanometers to 1 micrometer, and an aspect ratio of from 0.2 to 5. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A method for forming a composite microneedle array comprising:
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laying a film over a microneedle assembly, the microneedle assembly including a plurality of microneedles, the film having a first surface and a second surface, the film at least partially conforming to the microneedles, wherein the first surface of the film contacts the microneedle assembly, the second surface of the film comprising a plurality of nanostructures, the nanostructures being arranged in a predetermined pattern to project outward from the second surface of the film, wherein at least a portion of the nanostructures have a cross-sectional dimension of less than 500 nanometers and greater than 5 nanometers, a height of from 10 nanometers to 1 micrometer and an aspect ratio of from 0.2 to 5; and engaging the film with the microneedle assembly such that the film at least partially conforms to the microneedle array and adheres to the microneedle assembly. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39)
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Specification