Oral composition and a method for the treatment of coronaviruses infections in humans and animals. The method includes the steps of administering orally a methionine cleaving-enzyme; administering orally or parentally a protease inhibitor; and orally administering pyridoxal-L-phosphate in a fluid.

A composition and method for lowing serum and plasma levels of methionine by oral administration. The composition includes a recombinant methioninase enzyme and a cofactor (pyridoxal-L-phosphate). Methods of use describe methods for treatment of cancer, including malignant melanoma, by oral administration of the methioninase composition. Methods for chronic suppressive therapy of melanoma and other cancers are described. Because reduction of plasma methionine levels is effective in treating other conditions, including diabetes and conditions associated with aging, the use of the methods described herein includes treatment of these and other conditions.

The invention is related to a new method for treating liquid and solid cancers, in a mammal, including human, wherein methioninase is administered before asparaginase. The invention also encompasses the use of a dietary methionine deprivation, possibly combined with methioninase administration, in advance of asparaginase treatment. Methioninase and asparaginase may be used in particular under free form, pegylated form or encapsulated into erythrocytes.

The invention relates to a pharmaceutical composition containing a PLP-dependent enzyme and optionally its cofactor, pyridoxal phosphate (PLP), and/or a phosphate or non-phosphate precursor of PLP, its use as a drug, its production method and a therapeutic treatment method related to it. The pharmaceutical composition comprises erythrocytes and a pharmaceutically acceptable vehicle, the erythrocytes encapsulating the PLP-dependent enzyme. The PLP-dependent enzyme may be methioninase, tyrosine phenol-lyase, tyrosine aminotransferase or cystathionine beta-synthase.

Provided is an application of a genetically engineered bacterium of attenuated Salmonella typhimurium in preparation of medicines for treating liver cancer. The bacterium is attenuated Salmonella typhimurium VNP20009 carrying a plasmid cloned with a methioninase gene. Also provided is a construction method of the bacterium.

The present invention provides engineered methionine gamma lyase polypeptides and compositions thereof. The engineered methionine gamma lyase polypeptides have been optimized to provide improved thermostability, protease stability, and stability under a range of pH conditions, including acidic (pH<7) conditions. The present invention also relates to the use of the compositions comprising the engineered methionine gamma lyase polypeptides for therapeutic purposes.

The present invention provides engineered methionine gamma lyase polypeptides and compositions thereof. The engineered methionine gamma lyase polypeptides have been optimized to provide improved thermostability, protease stability, and stability under a range of pH conditions, including acidic (pH<7) conditions. The present invention also relates to the use of the compositions comprising the engineered methionine gamma lyase polypeptides for therapeutic purposes.

A combination of recombinant methioninase and regorafenib for the treatment of cancer. The combination of recombinant methioninase and regorafenib shows a synergistic effect that allows for a reduction in the dose of regorafenib, and thus decreases the dose-dependent toxicity of regorafenib.

The present disclosure provides uses of genetically engineered attenuated Salmonella typhimurium strain VNP20009-M in preventing and treating cancer metastasis. The genetically engineered strain VNP20009-M is targeted to cancer cells and has a significant effect of inhibiting metastasis and growth. VNP20009-M can be used to prepare medicaments for the prevention and treatment of tumor metastasis.

The technology described herein is directed to compositions and methods for reducing levels of methionine. In various aspects described herein are: engineered methionine-reducing probiotic microorganisms; engineered methanethiol-reducing probiotic microorganisms; and engineered taurine-producing probiotic microorganisms. Also described herein are methods of using such engineered microorganisms, such as for reduction of bioavailable methionine or for treatment of a methionine-associated disease or disorder. Also described herein are probiotic dietary supplements, pharmaceutical compositions, and food compositions comprising such engineered microorganisms.