Oral PEGylated insulin pH-sensitive naonparticle and preparation method thereof

A technology of PEGylation and polyethylene glycol butyraldehyde, which is applied in the direction of pharmaceutical formulations, medical preparations with non-active ingredients, medical preparations containing active ingredients, etc., can solve the problem that the encapsulation rate is only 33~49.2%, Poor drug absorption ability, no pH sensitivity and other problems, to achieve the effect of good pH sensitive response release performance, reduced release, and low cost

Inactive Publication Date: 2013-02-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disclosed a kind of PLGA preparation containing pegylated insulin in U.S. Patent No.09 / 999,82 as Lewis et al., this preparation can reduce blood sugar concentration in the animal body through subcutaneous injection, but can not be directly used for oral administration, and it comprises The sealing rate is only 33~49.2%; while Hinds et al [Kenneth Hinds, Kathleen Campbell, Kathleen Holland, PEGylated insulin in PLGA microparticles. In vivo and in vitro analysis, J Control Release, 2005, 104: 447-460] adopt the single emulsion method Using PLGA to encapsulate PEGylated insulin, the prepared microparticles have a higher drug loading capacity, but they are also not pH sensitive and can only be used for injection preparations
Existing pH-sensitive PEGylated insulin also has many deficiencies, such as [P. Calceti, S. Salmaso, G. Walker, A. Bernkop-Schnürch, Development and in vivo evaluation of an oral insulin–PEG delivery by Calceti et al. system, Eur J Pharm Sci, 2004, 22: 315] preparation of pegylated insulin tablets for improving the stability and oral bioavailability of pegylated insulin, the pegylated insulin tablets are adhered by membrane Composed of non-toxic polyacrylic acid-cysteine, the surface layer of the tablet is L100-55 enteric coating, the tablet shows pH-sensitive release characteristics, but the ability of the drug to be absorbed is poor, and it is not as good as nanoparticles, which is more conducive to the absorption of biomacromolecules absorb

Method used

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  • Oral PEGylated insulin pH-sensitive naonparticle and preparation method thereof
  • Oral PEGylated insulin pH-sensitive naonparticle and preparation method thereof
  • Oral PEGylated insulin pH-sensitive naonparticle and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Phacoemulsification to prepare W / O colostrum of PEGylated insulin, pH-sensitive polymer and carrier material: Weigh 40 mg of starch and dissolve it in 40 mL of deionized water to obtain a starch solution with a mass fraction of 0.1%. PEGylated insulin was dissolved in 0.5 mL of the above starch solution to form an internal aqueous phase; 1 mL of acetone and 4 mL of methylene chloride were mixed, and 50 mg of hydroxypropylmethylcellulose phthalate (abbreviation: HP55) was added to it Dissolve with 50mg polylactide (abbreviation: PLGA) to form an oil phase; mix 0.5mL internal water phase with 5mL oil phase, and ultrasonically emulsify at 40W for 0.5min to obtain W / O colostrum;

[0036] (2) Ultrasonic dispersion of W / O colostrum in the stabilizer solution to form W / O / W double emulsion: Weigh 100mg of polyvinyl alcohol (abbreviation: PVA), dissolve it in 10mL of deionized water, and form a PVA mass fraction of 1% The external water phase; mix 10mL of the external water ...

Embodiment 2

[0041] (1) Phacoemulsification to prepare W / O colostrum of PEGylated insulin, pH-sensitive polymer and carrier material: Weigh 200 mg of glycerol and add it into 40 mL of deionized water to obtain a glycerol solution with a mass fraction of 0.5%. PEGylated insulin was dissolved in 0.5mL of the above glycerin solution to form an internal water phase; 1mL of acetone and 4mL of dichloromethane were mixed, and 100mg of HP55 and 100mg of polylactic acid (PLA) were added to dissolve to form an oil phase; 0.5 Mix mL internal water phase and 5 mL oil phase, and ultrasonically emulsify at 40W for 4min to obtain W / O colostrum;

[0042] (2) Ultrasonic dispersion of W / O colostrum in stabilizer solution to form W / O / W double emulsion: Weigh 600mg of PVA and dissolve it in 20mL of deionized water to form an external aqueous phase with a mass fraction of PVA of 3%; Mix the external water phase with 5.5mL of W / O colostrum obtained in step (1), and ultrasonically emulsify at 60W for 2min to obt...

Embodiment 3

[0047] (1) Prepare W / O colostrum of PEGylated insulin, pH-sensitive polymer and carrier material by ultrasonic emulsification: Weigh 0.1 g of starch and dissolve it in 40 mL of deionized water to obtain a starch solution with a mass fraction of 0.25%. 10 mg of pegylated insulin was dissolved in 0.5 mL of the above starch solution to form an internal water phase; 1 mL of acetone and 4 mL of methylene chloride were mixed, and 100 mg of HP55 and 50 mg of PLGA were added to dissolve to form an oil phase; 0.5 mL of the internal water phase Mix with 5mL oil phase, 50W ultrasonic emulsification for 4min, get W / O colostrum;

[0048] (2) Ultrasonic dispersion of W / O colostrum in stabilizer solution to form W / O / W double emulsion: Weigh 0.8g of PVA and dissolve it in 40mL of deionized water to form an external aqueous phase with a mass fraction of PVA of 2%; Mix 40mL of the external water phase with 5.5mL of the W / O colostrum obtained in step (1), and ultrasonically emulsify at 50W for 4...

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Abstract

The invention discloses an oral PEGylated insulin pH-sensitive naonparticle and a preparation method thereof. The naonparticle is prepared from PEGylated insulin, pH-sensitive polymer, carrier, additives and stabilizer. The preparation method of the naonparticle comprises the following steps: preparing a PEGylated insulin / pH-sensitive polymer / carrier W / O primary emulsion, dispersing the W / O primary emulsion in a stabilizer solution to form a W / O / W multiple emulsion, obtaining a crude product after the solvent volatilizes, purifying the crude product, and carrying out freeze-drying to obtain the naonparticle. The PEGylated insulin pH-sensitive naonparticle disclosed by the invention has the advantages of uniform dispersion and high medicine enveloping rate; the insulin modified by polyethylene glycol can reduce the aggregation of insulin molecules, prolong the half life in vivo, and prolong the time of blood sugar reduction effect; and the release rate of the insulin in the gastric acid environment is reduced, the release rate of the insulin in the intestinal tract environment is enhanced since the naonparticle swells, and thus, the oral PEGylated insulin pH-sensitive naonparticle has an oral application value.

Description

technical field [0001] The invention belongs to the field of biomedicine and relates to a pH-sensitive nanoparticle and a preparation method thereof, in particular to an oral pegylated insulin pH-sensitive nanoparticle and a preparation method thereof. Background technique [0002] Common routes of drug administration include: oral, intravenous, intramuscular, and subcutaneous injections. Compared with other methods of administration, oral administration has the advantages of convenience, safety, relatively low cost, and good patient compliance. However, the route of oral administration has many limitations, and many factors in the administration process will affect the absorption of oral drugs. Most peptide and protein drugs are difficult to pass through the biomembrane barrier due to their large molecular weight and poor fat solubility. Moreover, due to the presence of a large number of peptidases and proteolytic enzymes in the gastrointestinal tract, they are easily elim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K9/14A61K38/28A61K47/48A61K47/38A61K47/34A61K47/32
Inventor 章莉娟蒋薇吴志民钱宇凌莉郭新东
Owner SOUTH CHINA UNIV OF TECH
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