title: Effect of bursal anti-steroidogenic peptide and immunoglobulin G on neonatal chicken B-lymphocyte proliferation.
abstract: In attempts to identify antibodies for Bursal Anti-Steroidogenic Peptide (BASP), rabbit serum was observed to reduce phorbol ester-stimulated chicken B-lymphocyte proliferation comparable to BASP. These experiments investigated the effects of IgG on B-lymphocyte proliferation. In Experiment 1, 3% rabbit serum decreased B-lymphocyte proliferation. In Experiment 2, 2 mg/ml of intact rabbit IgG or 0.65 mg/ml of IgG papain digest products, Fab and Fc, decreased B-lymphocyte proliferation. The combination of BASP and either Fab or Fc was observed to have at least an additive anti-proliferative effect. In Experiment 3, 0.01 mg/ml of either rabbit or chicken IgG, or 1.0 mg/ml of rabbit or 0.01 mg/ml of chicken Fab, Fc, and the pepsin digestion product F(ab')(2) was observed to have an anti-proliferative effect. No combined effects of BASP and IgG or IgG digest products were observed for this experiment. In Experiment 4, 12 mg/ml of chicken egg yolk IgG or 1.2 mg/ml Fab was found to suppress B-lymphocyte proliferation. Additionally, an additive effect of 12 mg/ml of IgG with BASP was again observed. The present studies suggest that IgG and its digestion products reduce phorbol-stimulated B-lymphocyte proliferation in vitro and combined treatment with IgG and BASP may have at least an additive anti-proliferative effect on B-lymphocyte proliferation.
authors.affiliation: Department of Poultry Science, Texas A&M University, College Station, TX 77843, USA. rwmoore@poultry.tamu.edu
authors.forename: R W
authors.initials: RW
authors.lastname: Moore
authors.forename: D Y
authors.initials: DY
authors.lastname: Caldwell
authors.forename: L R
authors.initials: LR
authors.lastname: Berghman
authors.forename: D J
authors.initials: DJ
authors.lastname: Caldwell
authors.forename: A P
authors.initials: AP
authors.lastname: McElroy
authors.forename: J A
authors.initials: JA
authors.lastname: Byrd
authors.forename: B M
authors.initials: BM
authors.lastname: Hargis
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D001402:B-Lymphocytes / Q000166:cytology / Q000187:drug effects* / Q000276:immunology; D002060:Bursa of Fabricius / Q000276:immunology / Q000502:physiology*; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D002645:Chickens; D004247:DNA / Q000096:biosynthesis; D007140:Immunoglobulin Fab Fragments / Q000494:pharmacology; D007141:Immunoglobulin Fc Fragments / Q000494:pharmacology; D007074:Immunoglobulin G / Q000494:pharmacology*; D010455:Peptides / Q000502:physiology*; D010704:Phorbols / Q000494:pharmacology; D011817:Rabbits; D013256:Steroids / Q000037:antagonists & inhibitors* / Q000096:biosynthesis
chemical_list: D007140:Immunoglobulin Fab Fragments; D007141:Immunoglobulin Fc Fragments; D007074:Immunoglobulin G; D010455:Peptides; D010704:Phorbols; D013256:Steroids; D004247:DNA; C033085:phorbol