A non-pyrogenic preparation containing nanoparticles synthesized by magnetotactic bacteria for medical or cosmetic applications. The nanoparticles are constituted by a crystallized mineral central part including predominantly an iron oxide, as well as a surrounding coating without material from the magnetotactic bacteria.

This invention provides block copolymer (BCP) encapsulated nanoparticles. The BCP-encapsulated nanoparticles are used in methods for targeting a tumor, in methods of imaging a tumor and in methods of treating cancer including hyperthermia of tumors. This invention further provides processes for preparation of BCP-encapsulated nanoparticles.

The present invention relates to MRI contrasting agent for contrasting cancer cell which contains ultrafine nanoparticles. More particularly, the present invention is directed to a self-assembled ligand composition comprising a ligand A, which is separated at a specific pH range, and a ligand B of which surface charge changes at a specific pH range, MRI contrast agent for contrasting cancer cell comprising said ligand composition and MRI contrasting nanoparticles, and the methods for preparing them.

Injectable compositions for the MRI detection of an analyte selected from the group consisting of reactive oxygen species, proteases and enzymes, comprising a) a matrix material based on a responsive hydrophobic polymer capable of undergoing a chemical reaction with the analyte to be detected, such reaction leading to a disruption of the polymer chain of the responsive polymer, b) a contrast agent suitable for use in magnetic resonance imaging, embedded in or encapsulated in the polymer a), c) optionally, a functionality capable of binding a marker or probe or a probe for creating a second detection signal, and d) optionally, a non-responsive polymer not undergoing a chemical reaction with the analyte under the conditions where polymer a) undergoes a reaction leading to chain breakage

Provided are iron oxide nanocapsules for an MRI contrast agent having high contrast, in which a plurality of iron oxide nanoparticles having a hydrophobic ligand attached thereto are encapsulated in an encapsulation material including a biodegradable polymer and a surfactant, and which satisfy Relations 1, 2, 3, 4 and 5 below. Also a method of manufacturing the iron oxide nanocapsules is provided.
5≦100*D.sub.μ(IO)/C.sub.ω(IO)  [Relation 1]
2.5≦100*D.sub.μ(Cap)/C.sub.ω(Cap)  [Relation 2]
0.5 wt %≦F(IO)≦50 wt %  [Relation 3]
1 nm≦D.sub.μ(IO)≦25 nm  [Relation 4]
50 nm≦D.sub.μ(Cap)≦200 nm  [Relation 5]

Disclosed herein are nanoconstructs comprising a nanoparticle, coated with additional agents such as cationic polymers, stabilizers, targeting molecules, labels, oligonucleotides and small molecules. These constructs may be used to deliver compounds to treat solid tumors and to diagnose cancer and other diseases. Further disclosed are methods of making such compounds and use of such compounds to treat or diagnose human disease.

The present disclosure provides contrast agent compositions comprises a plurality of nanoparticles, such as nanoparticles comprises an iron nanoparticle such as an iron nitride. The disclosure also provides methods for magnetic resonance imaging of the contrast agent compositions as well as other methods of performing magnetic resonance imaging. Further, the disclosure provides kits comprising a contrast agent composition.

Disclosed herein are nanoconstructs comprising a nanoparticle, coated with additional agents such as cationic polymers, stabilizers, targeting molecules, labels, oligonucleotides and small molecules. These constructs may be used to deliver compounds to treat solid tumors and to diagnose cancer and other diseases. Further disclosed are methods of making such compounds and use of such compounds to treat or diagnose human disease.

A non-pyrogenic preparation containing nanoparticles synthesized by magnetotactic bacteria for medical or cosmetic applications. The nanoparticles are constituted by a crystallized mineral central part including predominantly an iron oxide, as well as a surrounding coating without material from the magnetotactic bacteria.

Disclosed herein are pharmacologically acceptable magnetic nanoparticles suitable for administration to a subject.