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Neospora caninum: antibodies directed against tachyzoite surface protein NcSRS2 inhibit parasite attachment and invasion of placental trophoblasts in vitro. 2006

Gary J Haldorson, and James B Stanton, and Bruce A Mathison, and Carlos E Suarez, and Tim V Baszler
Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040, USA.

Polyclonal and monoclonal antibodies to native Neospora caninum tachyzoite surface protein NcSRS2 were generated and tested in vitro for their ability to neutralize tachyzoite attachment to and invasion of host cells. Host cells included Vero cells and a newly cloned, immortalized ovine trophoblast cell line obtained from primary cultures of ovine placenta. The ovine trophoblasts had morphology consistent with fetal trophoblasts and expressed mRNA for interferon-tau, a marker for trophoblasts. Native NcSRS2 was used to immunize mice to obtain monospecific anti-NcSRS2 polyclonal serum and anti-NcSRS2 monoclonal antibodies. Compared to irrelevant antibodies, monospecific anti-NcSRS2 serum and two anti-NcSRS2 monoclonal antibodies, 100.2.4.4 and 119.4.9.10, significantly blocked invasion of tachyzoites into both trophoblasts and Vero cells. Parasite attachment, assessed by IFA, was significantly reduced by anti-NcSRS2 mAb 100.2.4.4 and monospecific serum. The findings provide rationale to investigate a role for antibodies to NcSRS2 in prevention of N. caninum transplacental transmission in vivo.

UI MeSH Term Description Entries
D007150 Immunohistochemistry Histochemical localization of immunoreactive substances using labeled antibodies as reagents. Immunocytochemistry,Immunogold Techniques,Immunogold-Silver Techniques,Immunohistocytochemistry,Immunolabeling Techniques,Immunogold Technics,Immunogold-Silver Technics,Immunolabeling Technics,Immunogold Silver Technics,Immunogold Silver Techniques,Immunogold Technic,Immunogold Technique,Immunogold-Silver Technic,Immunogold-Silver Technique,Immunolabeling Technic,Immunolabeling Technique,Technic, Immunogold,Technic, Immunogold-Silver,Technic, Immunolabeling,Technics, Immunogold,Technics, Immunogold-Silver,Technics, Immunolabeling,Technique, Immunogold,Technique, Immunogold-Silver,Technique, Immunolabeling,Techniques, Immunogold,Techniques, Immunogold-Silver,Techniques, Immunolabeling
D007370 Interferon Type I Interferon secreted by leukocytes, fibroblasts, or lymphoblasts in response to viruses or interferon inducers other than mitogens, antigens, or allo-antigens. They include alpha- and beta-interferons (INTERFERON-ALPHA and INTERFERON-BETA). Interferons Type I,Type I Interferon,Type I Interferons,Interferon, Type I,Interferons, Type I
D008807 Mice, Inbred BALB C An inbred strain of mouse that is widely used in IMMUNOLOGY studies and cancer research. BALB C Mice, Inbred,BALB C Mouse, Inbred,Inbred BALB C Mice,Inbred BALB C Mouse,Mice, BALB C,Mouse, BALB C,Mouse, Inbred BALB C,BALB C Mice,BALB C Mouse
D010920 Placenta A highly vascularized mammalian fetal-maternal organ and major site of transport of oxygen, nutrients, and fetal waste products. It includes a fetal portion (CHORIONIC VILLI) derived from TROPHOBLASTS and a maternal portion (DECIDUA) derived from the uterine ENDOMETRIUM. The placenta produces an array of steroid, protein and peptide hormones (PLACENTAL HORMONES). Placentoma, Normal,Placentome,Placentas,Placentomes
D011247 Pregnancy The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH. Gestation,Pregnancies
D011257 Pregnancy Proteins Proteins produced by organs of the mother or the PLACENTA during PREGNANCY. These proteins may be pregnancy-specific (present only during pregnancy) or pregnancy-associated (present during pregnancy or under other conditions such as hormone therapy or certain malignancies.) Placental Proteins,Proteins, Placental,Proteins, Pregnancy
D002460 Cell Line Established cell cultures that have the potential to propagate indefinitely. Cell Lines,Line, Cell,Lines, Cell
D002522 Chlorocebus aethiops A species of CERCOPITHECUS containing three subspecies: C. tantalus, C. pygerythrus, and C. sabeus. They are found in the forests and savannah of Africa. The African green monkey is the natural host of SIMIAN IMMUNODEFICIENCY VIRUS and is used in AIDS research. African Green Monkey,Cercopithecus aethiops,Cercopithecus griseoviridis,Cercopithecus griseus,Cercopithecus pygerythrus,Cercopithecus sabeus,Cercopithecus tantalus,Chlorocebus cynosuros,Chlorocebus cynosurus,Chlorocebus pygerythrus,Green Monkey,Grivet Monkey,Lasiopyga weidholzi,Malbrouck,Malbrouck Monkey,Monkey, African Green,Monkey, Green,Monkey, Grivet,Monkey, Vervet,Savanah Monkey,Vervet Monkey,Savannah Monkey,African Green Monkey,Chlorocebus cynosuro,Green Monkey, African,Green Monkeys,Grivet Monkeys,Malbrouck Monkeys,Malbroucks,Monkey, Malbrouck,Monkey, Savanah,Monkey, Savannah,Savannah Monkeys,Vervet Monkeys
D003048 Coccidiosis Protozoan infection found in animals and man. It is caused by several different genera of COCCIDIA. Besnoitiasis,Besnoitiosis,Besnoitiases,Besnoitioses,Coccidioses
D005260 Female Females

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