Biological homeostasis is a state of steady internal, physical, and chemical conditions maintained by a living organism observed at the cellular level. Biological homeostasis can vary in order to alter the cellular physical and chemical conditions.
Topoisomerase 1 (TOP1) is an essential enzyme that plays a critical role in DNA transcription and replication. TOP1 inhibitors are a known class of anti-cancer agents that work to interrupt DNA replication in cancer cells, causing cell death. Since the discovery of the TOP1 inhibitor camptothecin (CPT) from plant extracts more than 60 years ago, two CPT analogs (irinotecan and topotecan) were approved by the FDA for cancer treatment. Tyrosyl-DNA phosphodiesterase 1 (TDP1) is an enzyme involved in DNA repair created when TOP1 is inhibited.
Millions of patients in the United States are afflicted by a host of bone diseases caused by osteoclast (specialized calls arising from the macrophage/monocyte lineage) dysfunction. Diseases include Paget’s disease, osteoporosis, fibrous dysplasia and osteolytic bone metastasis. The current standard of care for these diseases uses broad-spectrum therapies that either coat the skeletal system or inhibit osteoclast development in an effort to modulate osteoclastogenesis.
Measuring and mapping nervous tissue microstructure noninvasively is a long sought-after goal in neuroscience. Several neuropathologies – such as cancer and stroke – are associated with changes in tissue microstructure. Changes in material properties, such as stiffness, represent a sensitive measure of
The COVID-19 pandemic is a worldwide public health crisis with over 440 million confirmed cases and 6.0 million deaths as of March 2022. COVID-19 is caused by a novel coronavirus called Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). While there are several vaccines available for COVID-19, there are few therapeutics available that specifically target SARS-CoV-2. Middle East respiratory syndrome coronavirus (MERS-CoV) is less understood than SARS-CoV-2. MERS-CoV patients have a 65% long-term survival rate, according the World Health Organization (WHO).
Immunotherapy is a cutting-edge new category of treatment that aims to harness and, in some cases, modify the patient’s own immune cells to improve their ability to cure diseases. It can be an effective approach for a variety of conditions, ranging from cancer to inflammatory diseases. However, a number of obstacles to the overall success of immunotherapy still exist. For example, reactivity against a target antigen can be attenuated or the lifespan of the “modified” immune cells can be too short.
Measuring and mapping nervous tissue microstructure noninvasively is a long sought-after goal in neuroscience. Clinically, several neuropathologies such as cancer and stroke, are associated with changes in tissue microstructure. Diffusion tensor imaging (DTI), which models diffusion anisotropy, is an ideal imaging modality to elucidate these changes. However, DTI provides a mean diffusion tensor averaged over the entire MRI voxel. This has limitations when applied to heterogeneous neural tissue.
Biological nanoparticles, like extracellular vesicles (EVs), possess unique biological characteristics making them attractive therapeutic agents, targets, or disease biomarkers. However, their use is hindered by the lack of tools available to accurately detect, sort, and analyze. Flow cytometers are used to sort and study individual cells. But, they are unable to detect and sort nanomaterials smaller than 200 nanometers with single epitope sensitivity.
Extracellular Vesicles (EVs), including exosomes and microvesicles, are nanometer-sized membranous vesicles that can carry different types of cargos, such as proteins, nucleic acids and metabolites. EVs are produced and released by most cell types. They act as biological mediators for intercellular communication via delivery of their cargos. This unique ability spurred translational research interest for targeted delivery of therapeutic molecules to treat a wide range of diseases. EVs also contain interesting information of their specific cellular origin.
Traumatic brain injury (TBI) represents a major medical, social and economic concern worldwide due to significant mortality – especially among younger populations – and long-term disabilities. Various pathological brain lesions (e.g., intracerebral bleedings, necrotic-ischemic lesions, tissue avulsion) are produced by impacting mechanical forces. Among these, diffuse axonal injury (DAI) is one of the most significant brain lesions typically associated with trauma. However, DAI is not necessarily linked with TBI exposure. Therefore, the term “traumatic axonal injury (TAI)” is commonly used.