The present invention concerns the use of castanospermine or other alpha-glucosidase inhibitors for the treatment or prevention of Zika virus infections. Aspects of the invention include methods for treating or preventing Zika virus infection by administering an alpha-glucosidase inhibitor (e.g., an alpha-glucosidase I inhibitor) to a subject in need thereof; methods for inhibiting a Zika virus infection in a cell in vitro or in vivo; pharmaceutical compositions; packaged dosage formulations; and kits for treating or preventing Zika virus infection.

Substituted cyano cycloalkyl penta-2,4-dienes, cyano cycloalkyl pent-2-en-4-ynes, cyano heterocyclyl penta-2,4-dienes and cyano heterocyclyl pent-2-en-4-ynes as active substances against abiotic plant stress Cyanocycloalkylpenta-2,4-dienes, cyanocycloalkylpent-2-en-4-ynes, cyanoheterocyclylpenta-2,4-dienes and cyanoheterocyclylpent-2-en-4-ynes of the general formula (I) or salts thereof ##STR00001## where [X-Y], Q, R.sup.1, R.sup.2, A.sup.1, A.sup.2, V, W, m and n are each as defined in the description, to processes for preparation thereof and to the use thereof for enhancing stress tolerance in plants with respect to abiotic stress, and/or for increasing plant yield.

Substituted cyano cycloalkyl penta-2,4-dienes, cyano cycloalkyl pent-2-en-4-ynes, cyano heterocyclyl penta-2,4-dienes and cyano heterocyclyl pent-2-en-4-ynes as active substances against abiotic plant stress Cyanocycloalkylpenta-2,4-dienes, cyanocycloalkylpent-2-en-4-ynes, cyanoheterocyclylpenta-2,4-dienes and cyanoheterocyclylpent-2-en-4-ynes of the general formula (I) or salts thereof ##STR00001## where [X-Y], Q, R.sup.1, R.sup.2, A.sup.1, A.sup.2, V, W, m and n are each as defined in the description, to processes for preparation thereof and to the use thereof for enhancing stress tolerance in plants with respect to abiotic stress, and/or for increasing plant yield.

Provided herein are crystalline beta-D-nicotinamide riboside chloride compositions and methods of preparation and use thereof. Also provided are related pharmaceutical compositions and methods of use thereof. The crystalline beta-D-nicotinamide riboside chloride compositions may be used to treat a disease or disorder that would benefit from increased NAD levels including a mitochondrial disease or disorder, insulin resistance, a metabolic syndrome, diabetes, obesity, or for increasing insulin sensitivity in a subject.

Disclosed herein are methods of treating a hepatitis E viral infection comprising administering to a human subject in need thereof a therapeutically effective amount of the compound sofosbuvir, also known as (S)-isopropyl 2-(((S)-(((2R,3R,4R,5R)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-fluoro-3-hydroxy-4-methyltetrahydrofuran-2-yl)methoxy)(phenoxy)phosphoryl)amino)propanoate. Some methods further comprise concomitantly administering ribavirin to the subject. In some methods, the treatment is ribavirin-free. In some methods, the subject is immunocompromised. In some methods, the subject is pregnant.

Described are combination therapies and metabolically-activated drug conjugates and their use in treating cancer in subjects.

The present invention discloses a new application of a composition of phillyrin and phillygeninin in the preparation of drugs for alleviating or/and treating viral diseases. Experiments prove that the composition of phillyrin and phillygeninin has significant treatment effects on viral influenza and pneumonia, as well as on respiratory syncytial viruses, enteroviruses, herpes zoster simplex viruses, Coxsackie viruses, and the like. This composition is characterized by quick action and less toxic and side effects, and thus is an antiviral drug and health product with safety, high efficiency, stability and simple preparation process, and is suitable for industrial production and easy to promote. The present invention provides a new drug, health product and raw material for preventing and treating various viral diseases.

Nucleosides and nucleotides (nucleos(t)ides) have been in clinical use for almost 50 years and have become cornerstones of treatment for patients with viral infections or cancer. The approval of several additional drugs over the past decade demonstrates that this family still possesses strong potential. Therefore nucleos(t)ide are of great interest as promising chemotherapeutic agents, including: 2-deoxy-L-uridine (CAS 31501-19-6), 2-deoxy-D-uridine (CAS 951-78-0), telbivudine (CAS 3424-98-4), zidovudine (AZT, CAS 30516-87-1), trifluridine (CAS 70-00-8), clevudine (CAS 163252-36-6), PSI-6206 (CAS 863329-66-2), 2-(S)-2-chloro-2-deoxy-2-fluorouridine (CAS 1673560-41-2), ND06954 (CAS 114248-23-6), stavudine (CAS 3056-17-5), 5-ethynyltavu

Provided is an A.sub.3 adenosine receptor agonist (A.sub.3AR agonist) for the preparation of a pharmaceutical composition for the treatment of a mammal subject having osteoarthritis (OA), as well as to a method for the treatment of OA in a mammal subject, the method includes administering to said subject in need of said treatment an amount of A.sub.3AR agonist, the amount being effective to treat or prevent the development of OA. Preferred but not exclusive A.sub.3AR agonists in accordance with the present subject matter are IB-MECA and Cl-IB-MECA. The A.sub.3AR agonist may be administered in combination with another drug, such as Methotrexate (MTX). Also provided are pharmaceutical compositions for treatment of osteoarthritis including an amount of an A.sub.3AR agonist.

Compounds that modulate the conversion of AMP to adenosine by 5-nucleotidase, ecto, and compositions containing the compounds and methods for synthesizing the compounds, are described herein. The use of such compounds and compositions for the treatment and/or prevention of a diverse array of diseases, disorders and conditions, including cancer- and immune-related disorders, that are mediated by 5-nucleotidase, ecto is also provided.