Application of antibacterial peptide YD in preparing drug for treating hepatic fibrosis
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A technology of liver fibrosis and antimicrobial peptides, applied in the field of biomedicine, can solve the problems of no reports of antimicrobial peptides
Inactive Publication Date: 2019-08-16
LANZHOU UNIVERSITY
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However, the role of antimicrobial peptide YD in the...
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Embodiment 1
[0105] Preparation of antimicrobial peptide YD freeze-dried powder for intramuscular injection
[0106] Formula: antibacterial peptide YD (purity greater than 95%) 30.0g
[0107] Specific protein stabilizer, lyoprotectant / excipient 30.0g
[0110] Pharmaceutical water Add to total volume 60L
[0111] The total mass of freeze-dried powder is 60.0-70.0g
[0112] Process: According to the conventional process for preparing freeze-dried powder, a total of 1,000 freeze-dried powders were prepared, each containing 60-70 mg of antimicrobial peptide YD freeze-dried powder, and stored away from light.
[0113] The above-mentioned non-specific protein stabilizer and lyoprotectant are preferably mannitol, the excipient is preferably lactose, the osmotic pressure regulator is preferably NaCl, and the pH regulator is preferably citric acid / Tris-HCl buffer.
Embodiment 2
[0115] Preparation of Oral Preparation of Antimicrobial Peptide YD
[0116] Formula: antibacterial peptide YD (purity greater than 95%) 50.0g
[0117] Filler 85.0g
[0118] Adhesive 5.0g
[0119] Lubricant 10.0g
[0120] Total 200.0g
[0121] Process: 1,000 capsules are made according to the conventional process for preparing capsules, each capsule contains 50 mg of the active ingredient of antibacterial peptide YD, and the capsules are coated with an enteric-coated material acrylic resin to make an enteric-coated preparation. Excipients such as fillers, adhesives, and lubricants are conventional excipients in pharmacy.
[0122] In addition, oral preparations can also be made of microspheres, microcapsules, and nanospheres by wrapping the above-mentioned fillers, binders, lubricants and other auxiliary materials with polyester materials, and liposomes or nanospheres by wrapping chitosan. Granules, adding cholesterol, phospholipids and free fatty acids to prepare microemul...
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Abstract
The invention belongs to the field of biomedicine and relates to application of antibacterial peptide YD in preparing drug for treating hepatic fibrosis. The antibacterial peptide YD is antibacterialpeptide (APKGVQGPNG) separated and purified from bacillus amyloliquefaciens CBS antibacterial peptide YD1 reported in 2017, and in-vitro experiments prove that the antibacterial peptide YD has antibacterial activity and antioxidation activity. By allowing the antibacterial peptide YD to act on two cell models including a human hepatic satellite cell (LX-2) model and a lipopolysaccharide induced mice macrophage (RAW264.7) inflammation model and an in-vivo hepatic fibrosis mice model, it proves that the antibacterial peptide YD hinders occurrence and development of hepatic fibrosis by inhibitinginflammatory reaction, has effect of resisting hepatic fibrosis and is low in cytotoxicity, so that the antibacterial peptide YD can be taken as an active ingredient to prepare hepatic fibrosis resistant drug different in dosage forms by adopting pharmaceutically conventional processes and auxiliary materials, thereby having great medicinal application prospect.
Description
technical field [0001] The invention belongs to the technical field of biomedicine and relates to a new medical application of a polypeptide with antibacterial effect, in particular to the application of the antibacterial polypeptide antibacterial peptide YD in the preparation of drugs for treating liver fibrosis. Background technique [0002] Liver fibrosis is a complex physiological and pathological process involving various pathogenic factors, involving a variety of cells, cytokines, and signal transduction pathways. The pathological manifestation is mainly the synthesis of extracellular matrix (ECM) in the liver. The unbalance of degradation and degradation causes the deposition of extracellular matrix in the liver, causing structural changes in the liver and affecting liver function. If not treated in time, the process of fibrosis will develop into cirrhosis, liver failure and even liver cancer if it continues for a long time. Liver fibrosis is a common pathological pr...
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