摘要:
A method for detecting hepcidin. Having a sample liquid in contact with a nanochip having a specific surface coating structure of silicon oxide, so that hepcidin is enriched with specificity; eluting the nanochip with an eluent; by performing mass spectrometric detection on the elution product, determining the hepcidin content in the elution product. The enrichment method substantially enhances the sensitivity and accuracy of mass spectrometric detection. A kit for detecting hepcidin comprising a sample diluent and a nanochip, the sample diluent comprising water, trifluoroacetic acid, and acetonitrile.
摘要:
A method for detecting hepcidin. Having a sample liquid in contact with a nanochip having a specific surface coating structure of silicon oxide, so that hepcidin is enriched with specificity; eluting the nanochip with an eluent; by performing mass spectrometric detection on the elution product, determining the hepcidin content in the elution product. The enrichment method substantially enhances the sensitivity and accuracy of mass spectrometric detection. A kit for detecting hepcidin comprising a sample diluent and a nanochip, the sample diluent comprising water, trifluoroacetic acid, and acetonitrile.
摘要:
Disclosed are a variety of porous and non-porous wire-like structures of microscopic and nanoscopic scale. For instance, disclosed are structures that comprise a porous object that comprises: (i) a first region; and (ii) a second region adjacent to the first region along an axis of the object, where the first region has at least one porous property different from that of the second region. Also disclosed are structures that include: (i) a high resistivity silicon; and (ii) a cross-section that is substantially perpendicular to an axis of the object. Also disclosed are methods of making and using such structures. For instance, the present invention provides methods of making a porous object by: (i) obtaining an etchable substrate; (ii) forming on a surface of the substrate a patterned porosification assisting metal layer that has at least one opening; and (iii) subsequently exposing the substrate to a first etching solution and a second etching solution to form respectively a first region and a second region of a porous object.
摘要:
Provided is a composition that includes oblate spheroidal particles comprising an active agent, such as a therapeutic or imaging agent, and a method for treating or monitoring a physiological condition, such as a disease, by administering the composition to a subject in need thereof. Also provided are methods for making particles that have a volume that can enhance the particles' adhesion to a target site in a subject's body for a pre-selected shape of the particles and methods for making particles that have a shape that can enhance particles' adhesion to a target site in a subject's body for a pre-selected volume of the particles.
摘要:
The present invention pertains to therapeutic compositions and delivery systems comprising at least one microparticle or nanoparticle. In various embodiments, the surface of the microparticle or nanoparticle is modified or functionalized with at least a portion of an isolated cellular membrane, such as an isolated plasma membrane. In addition, the microparticle or nanoparticle contains at least one active agent, such as a therapeutic and/or imaging agent. In additional embodiments, the compositions and delivery systems of the present invention may be used for targeted delivery of an active agent. Also provided are methods of making the therapeutic compositions and delivery systems of the present invention.
摘要:
The invention generally relates to diffusion delivery systems and more particularly to high precision nanoengineered devices for therapeutic applications. The device contains diffusion areas that may be fabricated between bonded substrates, and the device can possess high mechanical strength. The invention further relates to capsules containing a diffusion delivery system. The present invention also relates to methods of fabricating the diffusion delivery systems.
摘要:
MRI imaging compositions are disclosed comprising non-chelated MRI contrast agents in the pores of at least one porous microparticle or nanoparticle. The compositions of the invention have been found to exhibit increased relaxivity and therefore, enhanced MRI imaging. The non-chelated contrast agents include T1 contrast agents, such as those including Gd(III) or Mn(II). Methods of MRI imaging and methods of making the compositions are also disclosed.
摘要:
Embodiments of the present invention comprise a quality control system and method for testing micro- or nano-channeled devices. The system and method can utilize a pressure-driven gas flow for the detection and quantification of structural defects. The test method and system are non-destructive and allow defects to be detected and classified quickly based on measured factors, such as mass flow rate for a given pressure differential.
摘要:
A new fractionation device shows desirable features for exploratory screening and biomarker discovery. The constituent MSCs may be tailored for desired pore sizes and surface properties and for the sequestration and enrichment of extremely low abundant protein and peptides in desired ranges of the mass/charge spectrum. The MSCs are effective in yielding reproducible extracts from complex biological samples as small as 10 μl in a time as short as 30 minutes. They are inexpensive to manufacture, and allow for scaled up production to attain the simultaneous processing of a large number of samples. The MSCs are multiplexed, label-free diagnostic tools with the potential of biological recognition moiety modification for enhanced specificity. The MSCs may store, protect and stabilize biological fluids, enabling the simplified and cost-effective collection and transportation of clinical samples. The MSC-based device may serve as a diagnostic tool to complement histopathology, imaging, and other conventional clinical techniques. The MSCs mediated identification of disease-specific protein signatures may help in the selection of personalized therapeutic combinations, in the real-time assessment of therapeutic efficacy and toxicity, and in the rational modulation of therapy based on the changes in the protein networks associated with the prognosis and the drug resistance of the disease.
摘要:
A thin film filter fabricated using surface micromachining. The width of the filter pores is determined by the thickness of a sacrificial thin-film layer. This dimension can be precisely controlled, and may be as small as about 50 angstroms. The pore length may also be determined by the thickness of thin film layers and can therefore be smaller than the limit of resolution obtainable with photolithography. The filters are suitable for use at high temperatures and with many harsh solvents.