Intestinotrophic glucagon-like peptide-2 analogs

An effector and islet technology, applied in the field of glucagon-related peptides, can solve problems such as little understanding of the physiological effects of glucagon-like peptides

Inactive Publication Date: 2008-09-03
1149336 ONTARIO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In contrast to GLP-1 and other glucagon-related peptides, although multiple GLP-2 homologues have been isolated from germline animals such as humans, rats, cattle, pigs, guinea pigs, hamsters, and degus and clarified their sequence, but little is known about the physiological role of glucagon-like peptide (GLP-2)

Method used

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  • Intestinotrophic glucagon-like peptide-2 analogs
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  • Intestinotrophic glucagon-like peptide-2 analogs

Examples

Experimental program
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Effect test

example 1

[0102] In the first experiment to study the effect of glucagon on the growth of the small intestine, two groups of mice (8 weeks old, CD1 female, obtained from Charles River Laboratories), 6 mice in each group, were treated as follows. Each mouse was subcutaneously injected with 0.5 cc of a 16% gelatin solution containing 41.5 µg of peptide every 12 hours for 10 consecutive days. Glucagon (rat) is easily soluble in 10ml of water. Control mice were injected with only 0.5cc of 16% gelatin solution without peptide every 12 hours. The mice were fed with standard rat chow, and the mice were given free access to food and water, and the mice were withdrawn from food and only given water 12 hours before sacrifice. For weighing the small intestine, the entire small intestine was dissected, followed by removal of the stomach (proximal) and appendix / cecum / large intestine (distal). The remaining small intestines were washed with saline to remove feces and weighed. The result is as foll...

example 2

[0111] The effect of the GLP-2 peptide on the growth of the small intestine was further investigated, in particular to evaluate the relationship between the tissue response and the dose, time, route and frequency of administration, type of preparation, and sex and age of the subjects. The detection of these effects was reflected not only by an increase in the weight of the small intestine, but also by an increase in the height of the glandular ducts and villi.

[0112] For these purposes, rat GLP-2 was prepared as described in Example 3. This rat GLP-2 was formulated in phosphate buffered saline or as a depot formulation containing gelatin. The method of preparing GLP-2 peptide with phosphate buffered saline is as follows: first prepare 10×PBS stock solution, that is, weigh 80g NaCl (BDH ACS 783), 2g KCl (BDH ACS 645), 11.5g NaCl 2 HPO 4 (Anachemia AC-8460) and 2g KH 2 PO 4 (Malinckrodt AR 7100), these reagents were dissolved in sterile distilled water in a total volume of...

example 3

[0129] Given the results observed with rat GLP-2 in test mice, it was hypothesized that various vertebrate rat GLP-2 homologues and analogs could also mediate enterotrophic effects. For this purpose, various GLP-2 and GLP-2 analogs were synthesized and evaluated for their activity, as described below.

[0130] Solid-phase peptide synthesis (SPPS) was performed manually in 300 milliliter (ml) vessels at the 3 millimole (mmole) scale using 6 grams (g) of chloromethyl (Merrifield) resin (for C-terminal free acid peptide), 0.5 milliequivalents (meq) per gram of substitution. Amino acids are protected at the amino terminus with a tert-butoxycarbonyl (tBoc) group. Amino acid side chains are protected using benzyl (Bz, for serine and threonine), benzyloxymethyl (BOM, for histidine), 2-bromobenzyloxycarbonyl (2-BrZ, for tyrosine ), 2-chlorobenzyloxycarbonyl (2-ClZ, for lysine), cyclohexyl (cHex, for aspartic acid and glutamic acid), and tosylate (Ts, for arginine ) side chain prote...

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Abstract

Glucagon-like peptide 2, a product of glucagon gene expression, and analogs of glucagon-like peptide 2, have been identified as gastrointestinal tissue growth factors. Their effects on the growth of small bowel and pancreatic islets are described. Their formulation as a pharmaceutical, and their therapeutic use in treating disorders of the bowel, are described.

Description

[0001] This application is a divisional application of Chinese patent application 96194693.8 "Glucagon-like peptide-2 and its therapeutic application" filed on April 12, 1996. [0002] Cross-references with related applications [0003] This application is a partial continuation of the application (serial number: 08 / 422,540) filed on April 14, 1995, and the content of the original application is incorporated here for reference. technical field [0004] The present invention relates to glucagon-related peptides which have growth-promoting properties of gastrointestinal tissue. The invention also relates to the therapeutic use of these peptides for the treatment of various diseases caused by poor growth or loss of gastrointestinal tissue, especially intestinal and pancreatic tissue. Background technique [0005] Expression of the glucagon gene produces tissue-specifically diverse peptide products derived from the processing of the 160-residue proglucagon product. Preprogluca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K38/26A61P1/04A61P3/10C07K14/605A61K38/00A61P1/00A61P1/18A61P3/08
CPCG01N33/74C07K14/605G01N2500/00A61K38/00G01N2333/605A61P1/00A61P1/04A61P1/14A61P1/18A61P29/00A61P3/10A61P3/08A61P43/00
Inventor D·J·德鲁克尔
Owner 1149336 ONTARIO
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