WO1998046742A2 - Dictyocaulus viviparus antigen zur diagnose des lungenwurmbefalls und zur vakzinierung - Google Patents
Dictyocaulus viviparus antigen zur diagnose des lungenwurmbefalls und zur vakzinierung Download PDFInfo
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- WO1998046742A2 WO1998046742A2 PCT/EP1998/002090 EP9802090W WO9846742A2 WO 1998046742 A2 WO1998046742 A2 WO 1998046742A2 EP 9802090 W EP9802090 W EP 9802090W WO 9846742 A2 WO9846742 A2 WO 9846742A2
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- protein
- seq
- dna
- glu
- cdna
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/43504—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from invertebrates
- C07K14/43536—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from invertebrates from worms
- C07K14/4354—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from invertebrates from worms from nematodes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
Definitions
- Dictyocaulus viviparus antigen for the diagnosis of lung worm infestation and for vaccination.
- the invention relates to an antigen from the adult stages of the lung worm Dictyocaulus viviparus (hereinafter also called D. viviparus or Dictyocaulus) of the bovine, with which one can detect lung worm infestation in cattle immunodiagnostically.
- D. viviparus Dictyocaulus viviparus
- the antigen can cause immune protection against D. viviparus.
- Lungworms are particularly pathogenic and economically important for small and large ruminants.
- Dictyocaulus is the only lung worm that reaches sexual maturity in cattle. It occurs worldwide where temperate temperatures of 15-20 ° C prevail at least at times.
- D. viviparus is common in Europe in the large floodplains, rainy coastal areas, but also on alpine pastures (R. Jörgensen (1980) Vet. Parasitol. 7, 153-167; H. Pfeiffer (1976) Vienna. Tierärztl. Mschr. 63 , 54-55). In the Netherlands e.g. Clinical dictyocaulosis was found in over 77% of the calf groups kept on pastures (J. Boch, R. Supperer (1992) Veterinary Parasitology. 4th ed., Parey, Berlin, pp. 294-301).
- the uptake of the third larvae with the pasture grass causes the disease (dictyocaulosis) in the calf exposed for the first time.
- the larvae reach the alveoli of the lungs through the bloodstream, which they break through to reach the air-carrying parts of the lungs.
- Breathing is made considerably more difficult, also by the adult stages leading to obstructions in the upper respiratory tract.
- Visible consequences of the severe impairment of the general condition reduced weight gain or even weight loss combined with growth retardation. Sometimes the clinical symptoms worsen dramatically and quickly lead to death.
- Lungworm disease in cattle can be diagnosed on the basis of clinical symptoms (G. Gräfner (1987) Monthly Vet. Med. 42: 178-181) or on the basis of the larvae excreted with the faeces (J. Boch, R. Supperer (1992).
- These options are particularly suitable for diagnosis on single animals if there is a strong infection, but modern mass animal husbandry requires epidemiological predictions and risk assessments regarding the outbreak of dictyocaulosis in the advanced grazing season based on appropriate diagnostics, ie in surveys many may still weak infected calves are tested with a safe, sensitive method.
- serological methods suitable A. Bellmer, T. Schnieder, AM Tenter (1989) Proc. 13 th Conf. Wrld Ass.
- the invention relates to a new, immunogenic, native protein, called DV 17, which was isolated from adult worms of Dictyocaulus viviparus. Its immunogenicity is mainly due to the fact that, after subcutaneous application, it induces an antibody response in cattle, which gives the animal immune protection.
- This protein can also be used in the ELISA for retrospective immunodiagnosis of dictyocaulosis in cattle.
- DV 17 is characterized by the following physical properties. The protein is stable in all buffers used. A reduction in the immunoreactivity after freezing (-85 ° C) of the purified antigen could not be determined.
- DV 17 has an estimated molecular weight of approx. 16500 daltons in SDS polyacrylamide gel (Phastgel 8-25%).
- the isoelectric point of DV 17 is in the range of 5.3-5.9.
- proteolysis with endopeptidase Lys C the partial amino acid sequences according to Table 1 were determined. As a biological property, the inhibition of development of Dictyocaulus viviparus in cattle is outstanding after vaccination.
- the object of the invention is therefore an immunogenic protein with a protective effect, which is isolated from adult worms of the lung worm Dictyocaulus viviparus and which preferably has a molecular weight of 15000-18000 Da, an isoelectric point between 5.3-5.9 and partial amino acid sequences according to Table 1.
- a preferred object of the invention is a protein which has a molecular weight of 16500 ⁇ 1500 Da and / or an isoelectric point of 5.6.
- Another object of the invention is a protein, characterized in that it contains the amino acid sequence according to Table 6 (SEQ ID NO .: 30) or parts thereof.
- Another object of the invention is a method for isolating a protein in which the isolation is carried out with the aid of extraction methods and chromatographic methods known to the person skilled in the art.
- Another object of the invention is a DNA coding for a protein as described above, preferably a DNA which contains a DNA sequence according to Table 1.
- Another object of the invention is a DNA, characterized in that it
- (a) contains a DNA sequence according to Table 6 (SEQ ID NO .: 29) or parts thereof or
- the invention further relates to a method for isolating said DNA, in which
- the oligonucleotides produced according to a) are radioactively or non-radioactively labeled and c) from a cDNA bank, produced from Dictyocaulus viviparus, cDNA clones are isolated which hybridize with the hybridization samples produced according to b) under stringent conditions.
- Another object of the invention is a method for isolating said DNA, in which
- RNA is used as the template for the PCR reaction, which is first reverse-transcribed in an additional step and the resulting cDNA first strand is used for PCR.
- Another object of the invention is a recombinant protein containing partial amino acid sequences according to Table 1, which is preferably obtainable by expression of a cDNA obtained as described above in prokaryotes or eukaryotes and purification by methods known to those skilled in the art.
- the invention also relates to an immunochemical method using the above-described protein from D. viviparus, with which the amount of DV 17-specific antibodies in the blood of cattle is determined by incubating EL 17 plates coated with DV 17 with bovine serum to be examined and any DV 17 / antibody complexes formed by peroxidase-conjugated, polyclonal antibodies and a corresponding color reaction known to the person skilled in the art.
- Another object of the invention is the use of the above-described protein from D. viviparus as a vaccine, combined with a carrier or adjuvant and, if appropriate, auxiliaries for immunizing cattle against dictyocaulosis.
- Another object of the invention is a diagnostic kit containing the protein of D. viviparus described above.
- an object of the invention is a vaccine containing the protein of D. viviparus described above as well as a carrier, an adjuvant and optionally auxiliary substances.
- Table 3 PCR fragments obtained from DV RACE cDNA using the degenerate primers from Table 2
- Table 6 cDNA and protein sequence of DV17.
- Chromatographically separated protein fractions obtained from homogenized, adult lungworms were further separated using SDS polyacrylamide gel electrophoresis and immobilized on Immobilon P membranes (semidry blotting).
- the lung worm-specific protein DV 17 was then detected with the specific infection sera and further purified using a reverse phase HPLC column.
- the purity of the protein fraction was checked in silver-colored SDS polyacrylamide gels (phast gels).
- the BCA protein assay was used to determine the protein concentration in electrophoretically pure DV 17 fractions and to freeze them at -85 ° C. Helminthennaive cattle were vaccinated twice with a defined amount of purified DV 17.
- the cattle were challenged with L3 larvae of Dictyocaulus viviparus 1 week after the second vaccination. Animals that were not vaccinated served as controls. 4 weeks after the challenge, the cattle were slaughtered, the number of adult worms determined in the lungs and the length of the male and female worms measured. As The reduction in the number of adult worms compared to the non-vaccinated control was defined as a measure of immune protection.
- the PCR conditions are to be determined in preliminary tests using any method known to those skilled in the art.
- Example 2 Obtaining adult lungworms
- 6-month-old, helminthennaive cattle were orally infected with 5000 third larvae of Dictyocaulus viviparus; the following day, the animals received the same dose of infection.
- the cattle were slaughtered 28 days after infection and after the section adult worms are collected from the lungs.
- the worms were then washed 3 times with phosphate-buffered saline, weighed and stored at -85 ° C until working up.
- the concentrated Superdex 75 prep grade fraction was mixed in a 1: 2 ratio with reduced SDS buffer; 40 ⁇ l of each / sample well was applied to an SDS Excel gel (Pharmacia).
- the electrophoresis was carried out in the Multiphor II chamber (from Pharmacia) under standardized running conditions (600 V, 50 mA, 30 W, running time: 90 min).
- the electrophoretically separated proteins were transferred to Immobilon P membranes by means of "semidry blotting" (Tovey ER, Baldo BA. Electrophoresis.
- bovine normal serum was incubated (Dilution 1:20 used) After washing 3 times with TBS + 0.05% Tween 20, the blot film was incubated with a biotin-labeled goat anti-bovine IgG (H + L) antibody (1: 500; Pierce) for 1 hour After washing three times (TBS + 0.05% Tween 20), the mixture was incubated for 1 hour with the enzyme conjugate biotin-streptavidin-alkaline phosphatase (1: 2500; Pierce). The substrate development was carried out using the Biorad substrate kit leads.
- the protein was further purified by means of HPLC.
- a Nucleosil C 18 5U column from Alltech was used (150 mm x 4.6 mm).
- the protein was eluted using a linear buffer gradient (buffer A: ultrapure water + 0.1% trifluoroacetic acid (TFA); buffer B: acetonitrile + 0.1% TFA).
- 500 ⁇ l of the fraction concentrated in Example 4 were diluted 1: 2 with buffer A and then injected into the column. The flow rate was 0.5 ml / min. The gradient elution was started 5 minutes after injection and ended 10 minutes later. A retention time of 14 min was measured for DV 17.
- Example 7 Purity detection and molecular weight determination
- the fraction purified by HPLC with a retention time of 14 min was treated with an SDS-polyacrylamide gel (Phast SDS-Gel 8-25%) in the phast system (Fa. Pharmacia) analyzed under standardized conditions.
- the "Silver Stain SDS-PAGE Standards, low range” kit from Biorad was used as the molecular weight marker.
- DV 17 was visualized by means of silver staining after electrophoresis (Silverstain Kit, from Pharmacia).
- the molecular weight determination was carried out using a video densitometer (Molecular analyst, from Biorad) using the "Profile analyst II" evaluation program. A molecular weight of 16,500 ⁇ 1,500 daltons was calculated for DV 17.
- DV 17 isolated according to Example 6 was diluted with ultrapure water and applied to prefabricated focusing gels (IEF Phastgels pH 3-10, Pharmacia). The focus in the phast system was carried out under standardized conditions. In order to determine the isoelectric point of DV 17, marker proteins with a defined, isoelectric point (pH 3.5 - 9.3 from Pharmacia) were carried along. The result was an isoelectric point from 5.3 to 5.9.
- DV 17 (40 ⁇ g) isolated and enriched according to Example 6 was cleaved with the aid of endopeptidase Lys C and the resulting peptides were purified using a C 18 reserve phase HPLC. 7 peptides were sequenced at the N-terminal. The seven partial amino acid sequences according to Table 1 were identified.
- Example 11 ELISA for the serological detection of a dictyocaulosis
- ELISA plates (Maxisorb from Nunc) were coated with a concentration of 5 ⁇ g DV 17 / ml PBS; the reaction volume was 100 ul per well. After incubation for 1 hour at 37 ° C., the plates were washed 3 times in an ELISA washer, the washing volume per well was 200 ⁇ l. Ultrapure water + 0.1% Tween 20 was used as the washing solution. Unspecific binding sites were blocked by incubation (3 hours at room temperature) with a proteolytic mixture of gelatin (Boehringer Mannheim). The incubation was carried out on a microtiter plate shaker at a shaking frequency of 300 rpm.
- D. viriparus total RNA was isolated by means of "DYNABEADS” (DYNABEADS mRNAdirekt hit, DYNAL). 400 ng of these were precipitated with ethanol and used as a template for a RACE (re-amplification of cDNA ends; Frohmann et al., 1988, Proc. Natl. Acad. Sci. USA 85: 8998-9002) cDNA synthesis, the "Marathon cDNA Amplification Kit” (Clontech) was used. The cDNA adapter-specific primers from the kit mentioned and the "Expand Long Template PCR System” (Boehringer Mannheim) were used. Conditions: 600 nM from each primer; 1, 75mM MgCI 2 , 400mM dNTPs, 392ng Taq Start Antibody (Clontech), 0.35U DNA Polymerase Mix. The temperature profile was as follows:
- the amplified DV17 RACE cDNA was diluted 1:20 in Tris-Glycine buffer (from the Marathon cDNA Amplification Kit) for use as a template in PCR reactions.
- a region of the DV17 cDNA sequence was PCR amplified from the RACE cDNA using degenerate primers whose sequences were obtained from the peptide sequences of the purified antigen.
- the primers were provided with restriction enzyme sites in such a way that the subsequent subcloning of the PCR fragments obtained was facilitated.
- the primers used are listed in Table 2. Five DNA fragments were obtained after 2 rounds of PCR in a PE 9600 Thermal Cycler (Perkin Elmer) (500 nM of each primer; 0.1 vol PCR buffer; 200 mM dNTP's; 1.25 units of the Ampli Taq Gold (Perkin Elmer The following temperature profile was available:
- the RACE reactions contained concentrations of 600 nM of each primer; 0.2 ul of diluted, amplified DV17 RACE cDNA; 0.1 vol of PCR buffer I; 200 ⁇ M dNTPs and 1.25 U Ampli Taq Gold.
- the temperature profile was the same as in the PCR reaction with the non-degenerate primers except that the annealing temperature was 60 ° C and the samples were left at 72 ° C for 360 s in the last cycle.
- 2 PCR fragments were obtained (Table 5). After RACE, the fragments were gel purified, subcloned and sequenced using a T7 promoter sequencing primer (Promega; sequence: TAATACGACTCACTATAGGG, SEQ ID NO .: 31).
- GTN GCN GAR CAY YTN AAR SEQ ID NO .: 12
- A055 / 1001 A055 / 1004 180 Yes
- A055 / 1001 A055 / 1005 480 No.
- A055 / 1002 A055 / 1004 150 Yes
- A055 / 1002 A055 / 1005 470 Yes
- A055 / 1003 A055 / 1005 400 Yes * determined by gel electrophoresis
- MOLECULE TYPE DNA (genomic)
- MOLECULE TYPE DNA (genomic)
- MOLECULE TYPE DNA (genomic)
- MOLECULE TYPE DNA (genomic)
- MOLECULE TYPE DNA (genomic)
- MOLECULE TYPE DNA (genomic)
- MOLECULE TYPE DNA (genomic)
- MOLECULE TYPE DNA (genomic)
- MOLECULE TYPE DNA (genomic)
- MOLECULE TYPE DNA (genomic)
- MOLECULE TYPE DNA (genomic)
- MOLECULE TYPE Protein
- CHARACTERISTICS
- MOLECULE TYPE DNA (genomic)
- MOLECULE TYPE DNA (genomic)
- MOLECULE TYPE DNA (genomic)
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- Gastroenterology & Hepatology (AREA)
- Biochemistry (AREA)
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- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Medicinal Chemistry (AREA)
- Molecular Biology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
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Abstract
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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AU76426/98A AU7642698A (en) | 1997-04-15 | 1998-04-09 | (dictyocaulus viviparus) antigen for the diagnosis of lungworm disease and for vaccination |
EP98924107A EP0975757A2 (de) | 1997-04-15 | 1998-04-09 | Dictyocaulus viviparus antigen zur diagnose des lungenwurmbefalls und zur vakzinierung |
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DE19715586.3 | 1997-04-15 | ||
DE19715586A DE19715586A1 (de) | 1997-04-15 | 1997-04-15 | Dictyocaulus viviparus Antigen zur Diagnose des Lungenwurmbefalls und zur Vakzinierung |
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WO1998046742A2 true WO1998046742A2 (de) | 1998-10-22 |
WO1998046742A3 WO1998046742A3 (de) | 1999-01-21 |
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PCT/EP1998/002090 WO1998046742A2 (de) | 1997-04-15 | 1998-04-09 | Dictyocaulus viviparus antigen zur diagnose des lungenwurmbefalls und zur vakzinierung |
Country Status (6)
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EP (1) | EP0975757A2 (de) |
AR (1) | AR012404A1 (de) |
AU (1) | AU7642698A (de) |
DE (1) | DE19715586A1 (de) |
WO (1) | WO1998046742A2 (de) |
ZA (1) | ZA983098B (de) |
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EP0785253A1 (de) * | 1996-01-19 | 1997-07-23 | Hoechst Aktiengesellschaft | Dictyocaulus viviparus Antigen zur Diagnose des Lungenwurmbefalls und zur Vakzinierung |
-
1997
- 1997-04-15 DE DE19715586A patent/DE19715586A1/de not_active Withdrawn
-
1998
- 1998-04-09 AU AU76426/98A patent/AU7642698A/en not_active Abandoned
- 1998-04-09 EP EP98924107A patent/EP0975757A2/de not_active Withdrawn
- 1998-04-09 WO PCT/EP1998/002090 patent/WO1998046742A2/de not_active Application Discontinuation
- 1998-04-13 AR ARP980101682A patent/AR012404A1/es not_active Application Discontinuation
- 1998-04-14 ZA ZA983098A patent/ZA983098B/xx unknown
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EP0785253A1 (de) * | 1996-01-19 | 1997-07-23 | Hoechst Aktiengesellschaft | Dictyocaulus viviparus Antigen zur Diagnose des Lungenwurmbefalls und zur Vakzinierung |
Non-Patent Citations (5)
Title |
---|
BRITTON C. ET AL.: "EXTENSIVE DIVERSITY IN REPEAT UNIT SEQUENCES OF THE CDNA ENCODING THE POLYPROTEIN ANTIGEN/ALLERGEN FROM THE BOVINE LUNGWORM DICTYOCAULUS VIVIPARUS" MOLECULAR AND BIOCHEMICAL PARASITOLOGY, Bd. 72, Nr. 1/02, 1995, Seiten 77-88, XP000671080 * |
BRITTON C. ET AL.: "STAGE-SPECIFIC SURFACE ANTIGENS OF THE CATTLE LUNGWORM DICTYOCAULUS VIVIPARUS" PARASITE IMMUNOLOGY, Bd. 15, Nr. 11, November 1993, Seiten 625-634, XP000670251 * |
DE LEEUW W. A. AND CORNELISSEN J. B. : "Identification and isolation of a specific antigen with diagnostic potential from Dictyocaulus viviparus." VETERINARY PARASITOLOGY, Bd. 39, Nr. 1-2, 1991, Seiten 137-147, XP002078798 * |
KENNEDY M W ET AL: "THE DVA-1 POLYPROTEIN OF THE PARASITIC NEMATODE DICTYOCAULUS VIVIPARUS" JOURNAL OF BIOLOGICAL CHEMISTRY, Bd. 270, Nr. 33, 18. August 1995, Seiten 19277-19281, XP002029740 * |
SCHNIEDER T.: "DICTYOCAULUS VIVIPARUS: ISOLATION AND CHARACTERIZATION OF A RECOMBINANT ANTIGEN WITH POTENTIAL FOR IMMUNODIAGNOSIS" INTERNATIONAL JOURNAL OF PARASITOLOGY, Bd. 22, Nr. 7, November 1992, Seiten 933-938, XP000670250 * |
Also Published As
Publication number | Publication date |
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WO1998046742A3 (de) | 1999-01-21 |
DE19715586A1 (de) | 1998-10-22 |
AU7642698A (en) | 1998-11-11 |
EP0975757A2 (de) | 2000-02-02 |
AR012404A1 (es) | 2000-10-18 |
ZA983098B (en) | 1998-10-15 |
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