Provided herein is a liposome comprising ribonucleic acid (RNA) molecules, a lipid mixture comprising DOTAP and cholesterol, and iron oxide nanoparticles (IONPs). Also provided herein is a liposome comprising ribonucleic acid (RNA) molecules and a lipid mixture comprising DOTAP and cholesterol, wherein the DOTAP and cholesterol are present in the lipid mixture at a DOTAP:cholesterol ratio of about 3:1 by mass. Related cells comprising the liposome, populations of cells, and compositions are also provided. Methods of making a liposome and methods of using the liposome are further provided.

The disclosure discloses an amphiphilic polymer nano micelle containing poly-3,4-dihydroxyphenylalanine chelated ferric ions, in which ferric ions are chelated with a catechol structure on a side chain of a biodegradable poly-3,4-dihydroxyphenylalanine block. The disclosure also provides a method for preparing the above micelle, comprising: complexing an amphiphilic polymer containing poly-3,4-dihydroxyphenylalanine with a ferric ion compound, and obtaining the amphiphilic polymer nano micelle containing poly-3,4-dihydroxyphenylalanine chelated ferric ions through a solvent replacement method. The micelle prepared by the disclosure is used as a Fe.sup.3+ magnetic resonance Ti imaging contrast agent, which can avoid toxic or side effects caused by a traditional gadolinium reagent, has a longitudinal relaxation rate of 5.6 mM.sup.1.Math.s.sup.1, can cycle for 150 min in a mice body, and has an obvious imaging effect and a far higher comprehensive performance than that of a commercial gadolinium contrast agent, and as well as a promising application prospect.

The present invention relates to a compressed solid composition for MRI comprising a physiologically acceptable manganese (II) compound, its preparation and use for preparing an oral solution.

The present invention relates to a compressed solid composition for MRI comprising a physiologically acceptable manganese (II) compound, its preparation and use for preparing an oral solution.

The present disclosure provides a pH and oxygen dual-sensitive magnetic resonance imaging contrast agent and a preparation method thereof, which is a dual-modal nanoparticle contrast agent with .sup.19F signal and CEST dual signal (.sup.19F-CEST), a CEST contrast agent that is dual-sensitive to pH and oxygen. The preparation method comprises: mixing a variety of phospholipid surfactants and cholesterol well to obtain a blend of phospholipid surfactants, which is dissolved in chloroform or a mixed solvent of chloroform and methanol, evaporated to dryness with a rotary evaporator and dried overnight in a vacuum oven at 40 C. after adding rhodamine, finally, it is dispersed in water containing glycerin by mechanical dispersion or ultrasonic vibration to obtain a lipid modifier; mixing perfluorocarbon, the lipid modifier obtained in step (1), glycerin, and water and ultrasonically mixing well with a probe, and extruding with an extruder to prepare a perfluorocarbon nanoemulsion.

Described herein is a new inert fluorinated gas which can be used for fluorine-19 (.sup.19F) magnetic resonance imaging (MRI) of the lungs. Specifically, this method uses 20-79% octafluorocyclobutane (OFCB) premixed with at least 21% oxygen to acquire for example static ventilation images of the lungs, dynamic multiple breathing images of the lungs, apparent diffusion coefficient measurements (ADC) of OFCB in the lungs, and ventilation-perfusion ratio (V/Q) mapping.

The disclosure relates to compositions comprising isolated mitochondria or combined mitochondrial agents, and methods of treating disorders using such compositions.

Provided is a bilirubin derivative-based ultrasound contrast agent for diagnosis and treatment. The fine particles including the bilirubin derivative are sensitive to reactive oxygen species (ROS), bind with hydrophobic drugs, and can effectively chelate metals such as iron oxide nanoparticles. Therefore, the fine particle of the present invention can be used as an ultrasound contrast agent for diagnosis, as a magnetic resonance imaging contrast agent, or as a carrier for hydrophobic drugs or platinum-based drugs.

Described herein is a reporter material platform that can be used to directly monitor the drug response in real-time. The reporter material can include an activator element which undergoes a chemical change in response to an immunonological response to a drug, and the chemical change can be detected using a reporter element. The reporter material can include a drug and a reporter element that are physically constrained in a close proximity. The reporter element produces a signal only when the drug induces a direct or indirect physiological change in the tumor or surrounding tissue. The reporter material platform can self-assemble via supramolecular interactions. This reporter material platform can be used to directly monitor the drug response in real-time.

This disclosure provides compositions of metal-binding fluorinated compounds and associated methods for producing cellular labels for tracking cells by magnetic resonance imaging (MRI), computed tomography (CT), positron emission tomography (PET), and related methods.