CN107569478A - The medicinal usage of Quercetin - Google Patents

Abstract

The title of the present invention is the medicinal usage of Quercetin.Affiliated technical field is medical science.The technical problems to be solved by the invention are to be related to Quercetin or its pharmaceutically acceptable solvate and its purposes as therapeutic agent especially as inhibitors of dipeptidyl IV.The main points of the technical scheme of the technical problems to be solved by the invention are to test of the compound to DPP IV enzyme inhibition activities.

Description

The medicinal usage of Quercetin

Technical field

The present invention relates to pharmaceutical technology field, and specifically, the present invention relates to compound Quercetin to be used as dipeptidyl peptidase The medicinal usage of IV (DPP-IV) inhibitor.

Background technology

DPP IV (IUBMB enzyme nomenclature EC.3.4.14.5) is a kind of II types memebrane protein, in the literature with a variety of Title refers to, including DPP4, DP4, DAP-IV, FAP β, ADCP 2, ABP (ADAbp), bis- peptidyls of Dipeptidylaminopeptidase IV, Xaa-Pro--aminopeptidase, Gly-Pro naphthyls amidase, rear proline (postproline) Dipeptidylaminopeptidase IV, lymphocyte antigen CD26, glycoprotein GP110, DPP IV, sweet ammonia Acyl Prolyl iminopeptidase, glycyl Prolyl iminopeptidase, X- prolyl pipeptidyl bases aminopeptidase, pepX, HLA CD26, glycylprolyl Dipeptidylaminopeptidase, two peptidyl-peptide hydrolases, glycylprolyl aminopeptidase, two peptidyls- Aminopeptidase IV, DPPIV/CD26, aminoacyl-prolyl pipeptidyl base aminopeptidase, T cell triggering molecule Tp103, X- PDAP.DPP IV is referred to herein as " DPP-IV ".

DPP-IV is a kind of non-classical serine aminopeptidase, and it is removed from the amino terminal (N- ends) of peptide and protein Remove Xaa-Pro dipeptides.Some naturally occurring peptides are also it has been reported that the DPP-IV dependences of X-Gly or X-Ser type dipeptides are slow Release.

The present invention relates to the chemical combination that can suppress dipeptidyl peptidase-IV (DipeptidylpeptidaseIV, DPP-IV) activity Thing and/or pharmaceutically acceptable solvate, this kind of compound can be used for treat diabetes, as diabetes B, hyperglycaemia, Metabolic syndrome, hyperinsulinemia, obesity, angiocardiopathy and abnormal such as atherosclerosis, cranial vascular disease, maincenter god Through systemic disease or abnormal including schizophrenia, anxiety disorder, Bipolar depression, depression, insomnia, cognitive disorder, stomach and intestine Disease and exception, cancer, inflammation and inflammatory disease, respiratory disease and exception, skeletal muscle is abnormal, osteoporosis, climacteric Symptom or exception, periodontal disease such as gingivitis, and various immunoregulatory disorders.

DPP-IV belongs to serine peptide enzyme family, belong to together the family also have DPP2, DPP8, DPP9, FAP and POP etc..Animal model experiment result shows that such as anaemia, alopecia, decrease of platelet and splenomegaly can be caused by suppressing DPP8/9 Deng toxic reaction [Lankas GR, Leiting B, et al.Dipeptidyl peptidase IV inhibition for the treatment of type2diabetes:potential importance of selectivity over dipeptidyl peptidases8and9.Diabetes,2005,54:2988-2994].Therefore, for the single targets of DPP-IV The design and significant [Bhumika DP, the ManJunath DG.Recent of exploitation for the selective depressant selected approaches to medicinal chemistry and therapeutic potential of dipeptidyl peptidase-4(DPP-4)inhibitors.European Journal of Medicinal Chemistry,2014,74: 574-605], this is also the difficult point and key point of new selective DPP-IV inhibitor research and development.

Therefore, this area still needs the strong selective DPP-IV inhibitors of structure novelty, activity to meet clinical treatment Demand.

The content of the invention

DPP IV (Dipeptidyl peptidase IV, DPP-IV, CD26, EC 3.4.14.5) is a kind of energy The serine protease of specific for hydrolysis polypeptide or protein N-terminal Xaa-Pro or Xaa-Ala dipeptides.DPP-IV is atypia Serine protease, the Ser-Asp-His catalytic triads in its C-terminal region are different from typical serine protease, are backward Arrangement.DPP-IV is II type integral membrane proteins, is distributed widely in mammal and respectively organizes.DPP-IV is small in intestines, liver, kidney near-end Pipe, prostate, the differentiation surface epithelial cell of corpus luteum and leukocyte sub-type such as lymphocyte and Expression of Macrophages.Deposited in serum In DPP-IV soluble protein form, its 26S Proteasome Structure and Function is identical with embrane-associated protein form but lacks hydrophobic transmembrane structure Domain.

Diabetes B and fat attractive therapy can be turned into by suppressing DPP-IV.Although DPP-IV inhibitor energy The sugar tolerance of diabetes B patient is effectively improved, but the half-life period of many inhibitor is shorter, or toxicity is larger.Therefore, it is necessary to open Hair has more the DPP-IV of advantage in pharmaceutical activity, stability, selectivity, toxicity, pharmacokinetics or medicine at least one aspect of characteristic Inhibitor is treated for diabetes B.Therefore, the invention provides a kind of novel DPP-IV inhibitors.

Embodiment

Following test example is for illustrating the present invention.

Compound Quercetin (CAS used in the present invention:117-39-5) obtained by mm Suppliers.

Biological assessment

Test example 1

The compounds of this invention is tested DPP-IV enzyme inhibition activities：

Instrument:

ELIASA, Envision (PerkinElmer, USA)

Material:

People source DPP-IV, obtained to be expressed using baculovirus expression system in insect cell.

Substrate, Ala-Pro-AMC.

Process:

DPP-IV can the ultraviolet excitation production of specific for hydrolysis substrate A la-Pro-AMC generations product AMC, AMC through 355nm Raw 460nm transmitting light, fluorescent value linear change at 460nm wavelength, is calculated DPP4 activity in dynamic cooling water of units of measurement time. Experiment is using MERK-0431 as control compound.

Sample is dissolved with DMSO, Cord blood, and concentration controls of the DMSO in final system is not influenceing detection activity Within the scope of.

Compound MERK-0431 is that IC50 [nM] is 17.57 to DPP-IV inhibitory action.

Compound Quercetin is 53.6% to DPP-IV inhibitory action when concentration is 20 μ g/mL.

Conclusion：Compound Quercetin in the present invention has certain inhibitory action to DPP-IV enzymes.

The present invention can be summarized with others without prejudice to the concrete form of the spirit or essential characteristics of the present invention.Therefore, nothing By from the point of view of which point, the embodiment above of the invention can only all be considered the description of the invention and can not limit this hair It is bright.

Claims (1)

1. application of the compound Quercetin in DPP IV (DPP-IV) inhibitor medicaments are prepared.