33 results about "Proteasome Inhibition" patented technology

The present invention relates to compounds, and methods utilizing compounds, which exhibit one or more of the following properties: i) disrupts organization of an actin cytoskeleton of a cell; ii) disrupts organization of a microtubule network of a cell; iii) induces accumulation of tubulin at centrosomes but does not induce accumulation of tubulin in a nucleus of a cell; iv) induces accumulation of tubulin at centrosomes at a concentration of 500 nM or less within four hours; v) induces accumulation of Hsp70 and has weak-to-moderate proteasome inhibitory activity; and vi) does not have proteasome inhibitory activity when assayed on purified proteasomes.

The present invention provides a method to treat multiple myeloma by the co-administration of one or more p38 MAP kinase inhibitors with one or more proteosome inhibitors.

The present invention is directed to the identification of markers that can be used to determine whether patients with cancer are clinically responsive or non-responsive to a therapeutic regimen prior to treatment. In particular, the present invention is directed to the use of certain combinations of markers, wherein the expression of the markers correlates with responsiveness or non-responsiveness to a therapeutic regimen comprising proteasome inhibition. Thus, by examining the expression levels of individual markers and those comprising a marker set, it is possible to determine whether a therapeutic agent, or combination of agents, will be most likely to reduce the growth rate of tumors in a clinical setting.

The invention provides a synthetic method of a proteasome inhibitor MLN9708. The method comprises: taking 2,5-dichloro benzoic acid as an initial raw material, and performing condensation and saponification to prepare N-(2,5-dichlorobenzoyl) glycine; joining N-(2,5-dichlorobenzoyl) glycine to L-leucine boronic acid pinacol ester hydrochloride; purifying the obtained product through forming a complex with diethanolamine and performing hydrolysis for deprotection to obtain corresponding free boric acid; and reacting the obtained product with citric acid to obtain MLN9708. The method is cheap and available in raw materials, simple and convenient to operate, mild in reaction conditions and easy for industrial production.

Disclosed herein are novel structures of proteasome inhibitors and methods for synthesizing and use thereof, including novel structures of proteasome inhibitors, such as syrbactins and its analogs, and methods for synthesizing them and using them for effective proteasome inhibition.

Disclosed herein is the use of HLM-008182, as well as its analogues formed via in-house synthesis, as a potent proteasome inhibitors. A new method was developed for HLM-008182 through a four-step protocol and the method was further optimized to a two step protocol. The synthesis in both protocols was regioselective with TiCl₄. The reaction was highly efficient with microwave assisted heating and THF as solvent. The modification around the molecule HLM-008182 established primary SAR, indicating that the proteasome inhibition activity was a function of the 2-side chain.

The invention provides a method for synthesizing a proteasome inhibitor Oprozomib and analogs thereof. The proteasome inhibitor Oprozomib is prepared through subjecting a dipeptide intermediate represented by a formula IV shown in the description to deprotection, and then, subjecting the de-protected dipeptide intermediate to a reaction with a peptide-terminated epoxy ketone fragment represented by a formula VIII shown in the description. The proteasome inhibitor Oprozomib synthesized by the method provided by the invention, i.e., an object compound is obtained through separately preparing the dipeptide intermediate and the peptide-terminated epoxy ketone fragment and finally carrying out condensation, the yield of synthesis is 42%, the racemization of amino acids is avoided, and meanwhile, HPLC purification for the end product is avoided, so that the reaction cycle is greatly shortened, the production cost is reduced, and the yield and purity of the product are improved. The proteasome inhibitor Oprozomib has a structural general formula shown in the description.

Disclosed is a total synthesis of a biologically active β-Lactam—Compound 3, which is related to Salinosporamide A and Omuralide, both structurally and by its activity as a proteasome inhibitor.

Also disclosed are proteasome inhibiting compounds having the formula:

wherein:

• R₁ is a cyclolower alkyl group; or R₁ is a lower alkyl group; and R₂ is either hydrogen or a lower alkyl group; R₃ is either hydrogen or a lower alkyl group; R₄ a halo-lower alkyl group; and R₅ is either hydrogen or a lower alkyl group.

Improved regimens for administering proteasome inhibitors are described, wherein proteasome inhibition is more sustained relative to certain current regimens which permit substantial recovery of proteasome activity between doses of inhibitor.

The invention provides a tripeptide macrocyclic derivative as well as an optical isomer, a pharmaceutically acceptable salt or a solvent compound thereof. A preparation method comprises the followingsteps: by taking a carboxyl protected compound as an initial raw material, condensation with an acid, performing olefin ring closing metathesis, removing carboxyl, condensing Boc protected amino acidwith an epoxy ketone segment, removing an amino protection group, and further condensing with an intermediate of which the carboxyl is removed, so as to obtain a target product. Experiments show thatthe derivative which has a completely novel framework and relatively good proteasome inhibition activity has a very good propagation inhibition function on multiple myeloma such as RPMI 8226, and MM.1S. The compound provided by the invention is easy in raw material obtaining, reasonable in route design, gentle in reaction condition, simple and convenient to operate and applicable to industrial production. The derivative is of a structure of formula (I) as shown in the specification.

The present application relates to novel fluorinated epoxyketone-based compounds, compositions comprising these compounds and their use, in particular for the treatment of diseases, disorders or conditions mediated by proteasome inhibition, in particular, the present application includes compounds of Formula I, and compositions and uses thereof:

The invention relates to the fields of pharmaceutical chemistry and medicine therapeutics, concretely relates to a new boric acid compounds, and a preparation method and a use thereof, and especially relates to new substituted five-membered heterocyclic boric acid and substituted benzo five-membered boric acid compounds, and a preparation method thereof. A result of bioactive screening test of the substituted five-membered heterocyclic boric acid and substituted benzo five-membered boric acid compounds having a structure represented by a formula shown in the description shows that the compounds have a proteasome inhibition effect, and can be further used for preparing medicines for treating proteasome correlated diseases.

Protein ubiquitylation, an essential post-translational modification, regulates almost every cellular process including protein degradation, protein trafficking, signal transduction, and DNA damage response in eukaryotic cells. The diverse functions of ubiquitylation are thought to be mediated by distinct chain topologies resulting from eight different ubiquitin linkages, chain lengths, and complexities. Currently, ubiquitin linkages are generally thought to be a critical determinant of ubiquitin signaling. However, ubiquitin chain lengths, another key element of ubiquitin signaling, have not been well documented especially in vivo situation during past three decades from the discovery of ubiquitin. The reason of this was simply because no method has been available for determination of ubiquitin chain length in endogenous ubiquitylated substrates. In the present invention, a practical technique for determining the actual length of substrate-attached polyubiquitin chains from biological samples is established. Using the method, the mean length of substrate-attached polyubiquitin chains was determined and the robustness of ubiquitin chain length regulation in cells is investigated. The following is a summary of findings in this invention: 1. A method for determining ubiquitin chain length was developed and this method was named ‘ubiquitin protection from trypsinization’ (Ub-ProT). 2. Using Ub-ProT, it was determined that the mean length of substrate-attached ubiquitin chains is in the dimer to decamer range. 3. By quantitative proteomics, it was found that the mean lengths of five major types of ubiquitin chains can be divided into two groups. 4. Proteasome-inhibition did not alter the mean length of substrate-attached polyubiquitin chains, indicating that cells have a robust system for regulating ubiquitin chain length.

The invention relates to a borate compound as shown in a formula (1), a pharmaceutically acceptable salt thereof, a preparation method and application thereof. The borate compound is novel in structure and has a proteasome inhibition function. The stability of the borate compound disclosed by the invention in a solution is far higher than that of Ixazomib. Especially when the pH is 1.2 and the pH is 6.8, the stability of the compound provided by the invention is more advantageous. Besides, microsome stability results show that the compound has good stability in five different liver microsomes, the half-life period of the microsomes of Ixazomib in cynomolgus monkeys is too long, the medicine is basically not metabolized, and serious toxicity can be caused. The compound can be used for preparing medicines for treating inflammation, immune-related diseases, cancers or hyperproliferative diseases and changing antigen peptides generated by proteasomes in organisms.

Assays that can measure the effect of proteasome inhibitors on target cells in a biological sample are provided. The assays include evaluation of the effects of proteasome inhibitors on proteasome activity in cells in a biological sample.

The invention relates to the technical field of insect genetic breeding, and particularly relates to a method for improving silkworm parthenogenesis early generation hatching rate. The method is characterized in that old mature female pupas are injected with a proteasome inhibitor MG132 with a concentration of 0.5-2 [mu]mol/L 1-2 days before emergence; after emergence, abdomens of virgin moths aretaken to obtain unfertilized silkworm eggs; the unfertilized silkworm eggs are immersed in a water bath of 46 DEG C, and are heat shock induced for 15-18 min; and after the induction, the unfertilized eggs are protected at 16 DEG C for 3 days, then the bivoltine breed is hastened for hatching after immediate acid immersion, and the polyvoltine breed is directly hastened for hatching. According tothe method, the silkworm parthenogenesis induction method is improved, while induction of the unfertilized eggs to remove fission block and restore mitosis is maintained, the side effect that the hatching rate of silkworm eggs is decreased is relieved, thereby improving the parthenogenesis early generation hatching rate, and shortening a parthenogenesis breed breeding cycle.

The invention relates to the fields of pharmaceutical chemistry and medicine therapeutics, concretely relates to new boric acid compounds, and a preparation method and a use thereof, and especially relates to a boric acid compound used as a 20S proteasome inhibitor, and a preparation method thereof. The invention also discloses a boric acid compound represented by formula I, and a preparation method thereof. A result of bioactive screening test shows that the compound prepared in the invention has a proteasome inhibition function, and can be further used for preparing medicines for treating proteasome correlated diseases.

The invention belongs to the field of control of pest resistance to insecticides, and more specifically relates to an application of a proteasome inhibitor MG-132 to a synergist of pyrethroid insecticides. The proteasome inhibitor MG-132 is used as the synergist of pyrethroid insecticides, dimethyl sulfoxide is used as a solvent in order to prepare the proteasome inhibitor MG-132 whose concentration is 30[mu]M, the proteasome inhibitor MG-132 is sprinkled on eggs and larvae of diamondback moth in fields as well as feed for pretreatment, and after 24 hours of pretreatment, pyrethroid insecticides can be applied. That MG-132 can substantially improve protection effects of deltamethrin is separately proved in individual and cell levels.

The invention disclosed herein generally relates to methods and compositions for inhibiting proteasome activity comprising a syrbactin compound have the structure of Formula (I) or (II).