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CANINE IgG NUCLEIC ACID MOLECULES

a technology of canine igg and nucleic acid molecules, which is applied in the field of canine igg and canine interleuken13 receptor proteins, fusion proteins, etc., can solve the problem of difficult to separate the roles of these cytokines

Inactive Publication Date: 2008-11-20
MCCALL CATHERINE A +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The described approach enables effective regulation of canine immune responses by targeting IL-13 and IL-13R activities, providing therapeutic options for managing immune-related conditions in dogs through specific immune response elicitation and treatment.

Problems solved by technology

Both IL-13 and IL-4 have long played a role in allergy and inflammation, but until recently it has been difficult to separate the roles of these cytokines.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Cloning the Heavy Chain of Canine IgG

Canine IgG Probe Preparation:

[0304]Degenerate primer C-IgG330-F (designated as SEQ ID NO: 40) was designed based on the conserved regions of IgGs from human, mouse, pig and bovine.

[0305]A ˜750 bp DNA fragment was amplified with C-IgG330-F and M13 Forward primers from canine spleen cell cDNA library in a “touch-down” PCR reaction. The reaction condition was 94° C. for 8 min, 3 cycles of 94 C for 30 Sec, 58 C for 45 Sec and 72 C for 1.2 min, then annealing temperature changed from 58 C to 56, 54, 52, 50, 48 and 46 C step-wise. The reaction was carried out for 3 cycles for each annealing temperature and 25 cycles at 44 C. The amplified DNA fragment was inserted into TA vector (Invitrogen). Plasmids that carry PCR amplified DNA were purified for sequencing. Blast search of the sequencing data indicated that the DNA fragment was coding for canine IgG.

[0306]cIg-13. DNA (designated as SEQ ID NO: 28; the reverse and complement of this sequence is SEQ ID ...

example 2

[0341]This example describes the isolation and sequencing of nucleic acid molecules encoding canine IL-13 receptor α1 (i.e. nCaIL-13Rα1) nucleic acid molecules of the present invention.

[0342]A cDNA library was prepared from a canine PBMC cDNA library. The library was a C. familiaris mitogen activated PBMC cDNA library that was constructed in the UNI-ZAP® XR Vector (available from Stratagene Cloning Systems, La Jolla, Calif.) using Stratagene's ZAP-cDNA® Synthesis Kit and the manufacturer's protocol. Two degenerate synthetic oligonucleotide primers were designed from the conserved regions of bovine, mouse and human IL-13 receptors (IL-13R): Primer 13R1F1, a sense primer corresponding to amino acid residues from 48 through 59 of human IL-13 receptor α1 denoted herein as SEQ ID NO:50 as found in U.S. Pat. No. 5,710,023, ibid has the sequence 5′ ATHTGGACNTGGAAYCCNCCNGARGGNGC 3′, denoted herein as SEQ ID NO:36; Primer 13R1R1, a anti-sense primer corresponding to amino acid residues from ...

example 3

[0346]This example describes the isolation and sequencing of nucleic acid molecules encoding a canine IL-13 receptor α2 (i.e., nCaIL-13Rα2) nucleic acids molecules of the present invention.

[0347]The same PBMC cDNA library described in Example 1 and a canine mast cell cDNA library were used as templates for the amplification of nCaIL-13Rα2 nucleic acid molecules. The canine mast cell cDNA library was prepared as follows. Total RNA was extracted from approximately 7×108 freshly harvested canine mast cells using an acid-guanidinium-phenol-chloroform method similar to that described by Chomzynski et al., 1987, Anal Biochem 162, 156-159. Poly A+ selected RNA was separated from the total RNA preparation by oligo-dT cellulose chromatography using the mRNA Purification Kit (available from Pharmacia, Newark, N.J.) according to the method recommended by the manufacturer. The canine mast cell cDNA library was constructed in lambda-UNI-ZAP® Synthesis Kit protocol (available from Stratagene, La ...

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Abstract

The invention relates to canine immunoglobulin G (IgG) and canine interleukin-13 receptors (IL-13R) as well as fusion proteins containing canine IgG and / or canine IL-13R. In particular, the present invention discloses nucleic acid molecules encoding canine IgG, including species-specific regions of the heavy chain of canine IgG, and canine IL-13R alpha chain (IL-13Rα) proteins, particularly canine interleuken receptor alpha 1 (IL-13Rα1) and canine interleuken receptor alpha 2 (IL-13Rα2) proteins. Also included are canine IgG and IL-13Rα proteins, antibodies having selectivity for such proteins, inhibitors of such proteins and / or nucleic acid molecules, cells transformed with said nucleic acid molecules, assays employing such cells, nucleic acids molecules, proteins, antibodies and / or inhibitors, and therapeutic compositions comprising said nucleic acids molecules, proteins, antibodies and / or inhibitors. Also included are kits containing said molecules or chimera thereof, including their use to evaluate and regulate an immune response in an animal.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a divisional of co-pending U.S. patent application Ser. No. 10 / 753,159, filed Jan. 7, 2004, entitled “CANINE IL-13 RECEPTOR ALPHA-1 SUBUNIT NUCLEIC ACID MOLECULES”; which is a divisional of U.S. patent application Ser. No. 09 / 828,995, filed Apr. 9, 2001, and issued as U.S. Pat. No. 6,703,360, entitled “COMPOSITIONS AND METHODS RELATED TO CANINE IgG AND CANINE IL-13 RECEPTORS”; which claims priority to U.S. Provisional Application Ser. No. 60 / 195,874, filed Apr. 7, 2000, entitled “CANINE IMMUNOGLOBULIN G MOLECULES AND RELATED METHODS”; and U.S. Provisional Application Ser. No. 60 / 195,659, filed Apr. 7, 2000, entitled “CANINE IL-13 RECEPTORS, PROTEINS, NUCLEIC ACIDS AND USES THEREOF”; all of which are incorporated by reference herein.FIELD OF THE INVENTION[0002]The present invention relates to novel canine proteins, and more particularly to canine IgG and canine interleuken-13 receptor proteins, fusion proteins, nucleic ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C07H21/04A61K38/00C07K14/715C07K16/00C12N1/21C12N15/12C12N15/13
CPCA61K38/00C07K14/7155C07K16/00C07K2317/73C07K2319/00C07K2317/52
Inventor MCCALL, CATHERINE A.TANG, LIANG
Owner MCCALL CATHERINE A
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