IgMAT: immunoglobulin sequence multi-species annotation tool for any species including those with incomplete antibody annotation or unusual characteristics

The advent and continual improvement of high-throughput sequencing technologies has made immunoglobulin repertoire sequencing accessible and informative regardless of study species. However, to fully map changes in polyclonal dynamics, precise annotation of these constantly rearranging genes is pivotal. For this reason, data agnostic tools able to learn from presented data are required. Most sequence annotation tools are designed primarily for use with human and mouse antibody sequences which use databases with fixed species lists, applying very specific assumptions which select against unique structural characteristics. We present IgMAT, which utilises a reduced amino acid alphabet, incorporates multiple HMM alignments into a single consensus and enables the incorporation of user defined databases to better represent their species of interest.Availability and implementationIgMAT has been developed as a python module, and is available on GitHub (https://github.com/TPI-Immunogenetics/igmat) for download under GPLv3 license.Supplementary informationModel Breakdowns

Purifikasi Imunoglobulin Yolk Pada Ayam yang Divaksin terhadap Ekskretori/Sekretori Stadium L3 Ascaridia galli

Purification yolk immunoglobulin of hens vaccinated against excretory/secretory Ascaridia galli L3 larvae stageABSTRACT. The main immunoglobulin fraction of poultry is called IgY, in order to distinguish it from the mammalian IgG. This article focus on purification yolk immunoglobulin of hens vaccinated against excretory/secretory Ascaridia galli larvae to obtained purity IgY. Active vaccinations with excretory/secretory antigen were applied intra muscularly of chickens with an initial dose of 80 μg. The vaccinations were repeated three times with dose of each 60 μg with an interval of one week. The first vaccinations were excretory/secretory antigen mixed with Fruend Adjuvant Complete and subsequently mixed with Freund Adjuvant Incomplete. Antibody response in yolk was detected at weekly intervals by agar gel precipitation test (AGPT). The chicken’s eggs were collected from 49 day after vaccinations. IgY was extracted from egg yolks by means of ammonium sulphate and purified using fast performance liquid chromatography (FPLC). The purity of anti-ekscretory/secretory IgY protein was determined by Bradford method (λ = 280 nm). The result showed that antibody in yolk was begun detect with AGPT at four weeks after vaccination. IgY concentration after purification was 0,875 ± 0.251 mg/ml. This study has shown that the product released in vitro by L3 stage A. galli is capable of stimulating humoral immunity by mean of producing antibody through yolk as biologic manufacturer could be a good choice.

Kajian Titer Antibodi Pada Yolk dari Ayam yang Diimunisasi Dengan Antigen Ekskretori/Sekretori Stadium L3 Ascaridia galli

Evaluation of antibody titre in yolk from immunized chickens with excretory/secretory antigen of L3 stage of Ascaridia galliABSTRACT. The purpose of the present study was to trigger humoral immunity of chickens egg yolk exposed to excretory/secretory released in vitro by L3 stage of Ascaridia galli. Amount of 6 head chickens were divided into two groups. First group, the chickens were not immunized. Second group, the chickens were immunized with excretory/ secretory. Active immunizations with excretory/ secretory antigen were applied intra muscularly of chickens with an initial dose of 80 μg. The immunizations were repeated three times with dose of each 60 μg with an interval of one week. The first immunizations were excretory/secretory antigen mixed with Fruend Adjuvant Complete and subsequently mixed with Freund Adjuvant Incomplete. Antibody response in yolk was detected at weekly intervals by enzyme linked immunosorbant assay (ELISA). The result showed that antibody in yolk was begun detect with ELISA increased at two weeks after immunization, This study has shown that the excretory/secretory released in vitro by L3 stage A. galli is capable of stimulating humoral immunity by mean of producing IgY in yolk.

Monoclonal antibody to rat ovarian inhibin

ABSTRACT Ovaries from rats treated with pregnant mare serum gonadotrophin were used as a source of inhibin for raising monoclonal antibodies. The antisera were screened for binding to rat ovarian tissue sections and examined for their ability to neutralize inhibin bioactivity in vitro, i.e. the ability to abolish the suppressive action of rat inhibin on pituitary FSH secretion. Two monoclonal antibodies to rat ovarian inhibin were raised, one exhibiting complete (antibody PHM15) and the other incomplete (antibody MCA-3) neutralizing ability. Both antisera bound well to antral granulosa cells, as judged by the degree of staining using an indirect horseradish peroxidase technique. Ascites fluid from mice injected with hybridoma cells secreting antibody PHM15 also showed inhibin-neutralizing ability, and was effective against inhibin prepared from ovarian follicular fluid of rats, sheep, pigs and cows. The latter observation indicates the potential application of this antibody to the preparation and measurement of inhibin from several animal species. J. Endocr. (1986) 109, 379–383