Camelidae antibodies against imminoglobulin e and use thereof for the treatment of allergic disorders

a technology of immunoglobulin and camelidae, which is applied in the field of polypeptide therapy, can solve the problems of ineffective administration of conventional antibodies and their derived fragments or single-chain formats (e.g. scfv's), inability to treat allergic disorders, and inability to administer conventional antibodies or their derived fragments or single-chain formats (e.g. scfv's) orally, so as to prevent and/or alleviate symptoms

Inactive Publication Date: 2006-06-01
ABLYNX NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0037] Another embodiment of the present invention is a polypeptide construct comprising at least one single domain antibody directed against a target, for use in treating, preventing and/or alleviating the symptoms of disorders which are susceptible to modulation by an anti-target therapeutic compound that is able pass through the gastric environment without being inactivated.
[0038] Another embodiment of the present invention is a polypeptide construct comprising at least one single domain antibody directed against a target for use in treating, preventing and/or alleviating the symptoms of disorders which are susceptible to modulation by an anti-target therapeutic compound that is able pass through the wall of the intestinal mucosa without being inactivated
[0039] Another embodiment of the present invention is a polypeptide construct comprising at least one single domain antibody directed against a target for use in treating, preventing and/or alleviating the symptoms of disorders which are susceptible to modulation by an anti-target therapeutic compound that is able pass through the wall of the nose, upper respiratory tract an...

Problems solved by technology

However, they have one important drawback: these are complex, large molecules and therefore relatively unstable, and they are sensitive to breakdown by proteases.
Because the degradation they undergo during passage through, for instance, the gastrointestinal tract, administration of conventional antibodies and their derived fragments or single-chain formats (e.g. scFv's) is not very effective.
This means that conventional antibody drugs cannot be administered orally, sublingually, topically, nasally, vaginally, rectally or by inhalation because they are not resistant to the low pH at these sites, the action of proteases at these sites and in the blood and/or because of their large size.
Administration by injection is therefore the most frequently used method of administration although the method has many disadvantages, for example: (a) poor to...

Method used

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  • Camelidae antibodies against imminoglobulin e and use thereof for the treatment of allergic disorders
  • Camelidae antibodies against imminoglobulin e and use thereof for the treatment of allergic disorders
  • Camelidae antibodies against imminoglobulin e and use thereof for the treatment of allergic disorders

Examples

Experimental program
Comparison scheme
Effect test

example 1

VHH Directed Against IgE

[0357] Two llama's were immunized with human IgE, Scripps laboratories, Cat nr. 10224. The following immunization schemes were used according to Table 1.

[0358] Different sources for RNA extraction were used: [0359] 150 ml immune blood, between 4 and 10 days after the last antigen injection [0360] lymph node biopsy 4 days after the last antigen injection

[0361] Peripheral blood lymphocytes (PBLs) were isolated by centrifugation on a density gradient (Ficoll-Paque Plus Amersham Biosciences). PBLs and lymph node were used to extract total RNA (Chomczynski and Sacchi 1987). cDNA was prepared on 200 μg total RNA with MMLV Reverse Transcriptase (Gibco BRL) using oligo d(T) oligonucleotides (de Haard et al., 1999). The cDNA was purified with a phenol / chloroform extraction, followed by an ethanol precipitation and subsequently used as template to amplify the VHH repertoire.

[0362] In a first PCR, the repertoire of both conventional (1.6 kb) and heavy-chain (1.3 kb)...

example 2

Topical Applications of Anti-IgE VHH's

[0372] To obtain anti-allergic pharmaceutical compositions for ophthalmic topical applications, a solution of anti-IgE VHH was prepared as follows: [0373] eye drops containing a therapeutic dose of anti-IgE VHH dissolved in 100 ml of sterilized water containing 0.9 g sodium chloride, 0.02 g sodium citrate, 0.02 g methyl parahydroxybenzoate, 0.1 g chlorobutanol and acetic acid suitabe to obtain a pH of 6.5. [0374] eye ointment containing a therapeutic dose of anti-IgE VHH was prepared according to the conventional method containing 1.0 g of liquid paraffin and a suitable amount of soft paraffin to obtain a total mixture of 100 g.

example 3

Anti-IgE Formulation

[0375] Anti-IgE VHH's that block binding of IgE to its high-affinity receptor are of potential therapeutic value in the treatment of allergy.

[0376] Highly purified VHH#2H11 was dialysed into formulation buffer, followed by addition of lyoprotectant at an isotonic concentration. Isotonic formulation was performed as follows: VHH#2H11 at 25 mg / ml was formulated in 5 mM histidine buffer at pH 6 with 500 moles of sugar per mole antibody. This formulation is reconstututed with BWFI (0.9% benzyl alcohol) at a volume which results in a 100 mg / ml of antibody in 20 mM histidine at pH 6 with an isotonic sugar concentration of 340 nM. The binding activity of the anti-IgE VHH in the isotonic formulations was measured in an IgE receptor inhibition assay. It was found that binding activity was essentially unchanged following storage at 4° C. for up to 3 months.

TNF-alpha

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Abstract

The invention relates to a method suitable for administering protein therapeutic molecules orally, sublingually, topically, intravenously, subcutaneously, nasally, vaginally, rectally or by inhalation so as to avoid inactivation, by using VHH polypeptides derived from Camelidae antibodies. The invention further relates to the said therapeutic molecules. The invention further a method for delivering therapeutic molecules to the interior of cells. The invention furthe relates to anti-IgE therapeutic molecules.

Description

BACKGROUND [0001] Polypeptide therapeutics and in particular antibody-based therapeutics have significant potential as drugs because they have exquisite specificity to their target and a low inherent toxicity. However, they have one important drawback: these are complex, large molecules and therefore relatively unstable, and they are sensitive to breakdown by proteases. Because the degradation they undergo during passage through, for instance, the gastrointestinal tract, administration of conventional antibodies and their derived fragments or single-chain formats (e.g. scFv's) is not very effective. This means that conventional antibody drugs cannot be administered orally, sublingually, topically, nasally, vaginally, rectally or by inhalation because they are not resistant to the low pH at these sites, the action of proteases at these sites and in the blood and / or because of their large size. They have to be administered by injection (intravenously, subcutaneously, etc.) to overcome...

Claims

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Application Information

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IPC IPC(8): A61K39/395C07K16/42C07H21/04C12P21/06C12N5/06A61P11/06A61P19/02A61P31/06A61P31/16A61P35/00A61P37/06C07K16/10C07K16/12C07K16/18C07K16/24C07K16/28C07K16/30C07K16/36C07K16/40C07K16/46C12N15/13G01N33/577
CPCA61K2039/505C07K16/18C07K16/241C07K16/249C07K16/2863C07K16/2875C07K16/36C07K16/40C07K16/4291C07K2317/22C07K2317/24C07K2317/31C07K2317/565C07K2317/569C07K2317/62C07K2317/626C07K2317/76C07K2317/77C07K2319/00C07K2319/31A61P1/00A61P1/04A61P1/14A61P1/16A61P3/10A61P5/00A61P7/00A61P7/02A61P7/06A61P9/08A61P9/10A61P11/00A61P11/06A61P13/00A61P13/12A61P15/08A61P17/02A61P17/06A61P19/02A61P21/04A61P25/00A61P25/02A61P27/02A61P27/16A61P29/00A61P31/06A61P31/16A61P35/00A61P37/00A61P37/02A61P37/06A61P37/08A61P43/00C07K16/468
Inventor SILENCE, KARENVAECK, MARKVAN BERGEN EN HENEGOUWEN, PAUL P.M.P
Owner ABLYNX NV
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