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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 97 (1962), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A search was made for lymphocyte antigens associated with resistance or susceptibility to the T-cell lymphoma induced by the herpes virus of Marek's disease (MD), the experimental model for Burkitt's lymphoma of humans. Antisera were produced by reciprocal immunization with whole blood between an MD-resistant and susceptible line of chickens compatible at the major histocompatibility complex (MHC), and were tested against lymphocytes of both lines. The lymphocytes were not agglutinated, immobilized, or lysed, but their ability to evoke graft-versus-host (GVH) splenomegaly was reduced. This inhibitory activity was line-specific, and these sera had a maximum limiting effect on GVH splenomegaly at a dilution of 1/50 and a minimum at 1/800 dilution. A test based on the differential limitation of GVH splenomegaly by a pair of alloantisera was used to identify the antigens in F1 and F2 generations. The segregation results established a locus,Ly-4, with two codominant alleles,Ly- 4a andLy-4 b .Ly-4 is distinct from theA, B, orC blood group loci and from theBu-1 locus determining B-cell antigens, but may be linked to theTh-1 locus determining T-cell antigens (recombination frequency of 32 percent). Tentative evidence was obtained from comparisons of homozygous F2 and F3 progeny for association of theLy-4 allele characteristic of the susceptible line with increased incidence of MD.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 270 (1977), S. 61-62 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The genetically resistant chicks were from East Lansing inbred line 6 subline 1 (R), and the genetically susceptible chicks from the Fl cross of East Lansing inbred lines 15 subline 1 and 7 subline 2 (S)22. These chicks are semi-allogeneic, having major histoeompatibility genotypes B2/B* and ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 269 (1977), S. 597-598 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The nonapeptide, NH2-Gln-Ala-Lys-Ser-Gln-Gly-Gly-Ser-Asn-COOH, was synthesised using solid-phase methodology (Peninsula, San Carlos, California). The purified peptide showed a single spot in four thin-layer chromatography systems and on high voltage electrophoresis at pH 6.5. After acid hydrolysis, ...
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Two sets of backcross matings were performed to test for linkage between genes coding for the Ia-like antigens (“Ia”) and the B erythrocyte antigens (Ea-B) of the chicken. Evidence is presented which indicates that the “la” antigens are determined by a single codominant locus and that theEa-B and “Ia” loci are on the same chromosome. Failure to detect a single recombinant between theEa-B and “Ia” loci out of 208 progeny suggests close linkage of the two genes with a map distance of up to about 2 centimorgans. The “Ia” genes are thus included in theB major histocompatibility complex of the chicken.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Chickens of Regional Poultry Research Laboratory (RPRL) inbred line 63 regress sarcomas induced by Bryan high-titer Rous sarcoma virus to a greater extent than chickens of line 72, although these lines are identical for the major histocompatibility complex (MHC, B complex). They differ, however, at two independent autosomal loci, Ly-4 and Th-1, which determine surface alloantigens of partly overlapping subsets of T lymphocytes. Association of genotypes at these loci with quantitative variation in ability to regress Rous sarcomas was tested in segregating progeny derived from crosses of lines 63 and 72. In the F4 generation chickens of the Ly-4 a /Ly-4 a , Th-1 a /Th-1 a genotype (symbolized aa/aa) had significantly higher regressor ability than any of the other three double homozygous genotypes. In F5, all nine genotypes formed by combinations of homozygotes and heterozygotes were tested, and higher regressor ability was shown by the aa/aa, ab/aa, and aa/ab genotypes. These results indicate that higher regression is associated with: (1) interaction between the line 63 Ly-4 a and Th-1 a alleles in homozygous form; and (2) dominance x dominance interaction, in that the a allele at each locus is dominant for higher regression only within the homozygous aa genotype at the other locus.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Immunogenetics 14 (1981), S. 535-539 
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Chickens of Regional Poultry Research Laboratory (RPRL) inbred line 63 regress sarcomas induced by Bryan high-titer Rous sarcoma virus to a greater extent than chickens of line RPRL 100, although these lines are identical for the major histocompatibility B complex. They differ, however, at three independent autosomal loci: Ly-4 and Th-1 determine the surface alloantigens of partly overlapping subsets of T lymphocytes, and Bu-1 determines a surface alloantigen of B lymphocytes. The association of genotypes at these loci with quantitative variation in their ability to regress Rous sarcomas was tested in segregating F4 generation progeny derived from crosses of lines 100 and 63. The Ly-4 and Bu-1 genotypes showed association with Rous sarcoma regression, but the Th-1 genotype did not. Chickens of the Ly-4 a/Ly-4 a, Bu-1 b/Bu-1 b and Ly-4 b/Ly-4 b, Bu-1 a/Bu-1 a genotypes had a significantly higher regressor ability than the other two double homozygous genotypes. These results indicate that higher regression is associated with (1) interaction between the Ly-4 and Bu-1 loci, and (2) complementation between either the line 6 Ly-4 a allele and the line 100 Bu-1 b allele, or the line 100 Ly-4 b allele and the line 6 Bu-1 a allele.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Alloantisera were prepared by reciprocal immunizations with bursal or thymic lymphoid cells between chickens of two inbred lines identical at theB major histocompatibility locus. In cytotoxic assays, antibursa sera were specific for donor-line bursa cells without absorption; antithymus sera were similarly specific for donor-line thymus cells. Both types of sera cytolyzed some peripheral lymphoid cells from spleen, bone marrow, and blood. Absorption of either type of serum with peripheral blood leukocytes removed all cytotoxic reactivity for central lymphoid cells. The inheritance of the alloantigens detected by these specific antisera was studied in F1, F2, and backcross progeny from the two lines. Phenotypes were determined by a method in which antisera preabsorbed with progeny leukocytes were reacted against51Cr-labeled bursal or thymic cells from chickens of both lines. The results established two independent autosomal loci-Bu-1 andTh-1-determining antigens expressed, respectively, on bursal cells and peripheral B lymphocytes or on thymic cells and peripheral T lymphocytes. Cytotoxic testing of bursal or thymic cells from chickens of other inbred lines and F1 populations led to the tentative conclusion that the number of alleles atBu-1 is restricted, whileTh-1 exhibits considerable multiple allelism.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract We compared two of the East Lansing Regional Poultry Research Laboratory inbred chicken lines for immune responses to four antigens injected in Freund's complete adjuvant, and to the chemical oxazolone as a contact sensitizer. Line EL6 chickens gave higher delayed hypersensitivity responses than did EL7 birds to BSA, dodecanoic acid-conjugated BSA, and ferritin, as well as to oxazolone. Line EL6 gave the higher primary antibody responses to the first three of these antigens, but EL7 gave the higher responses to the hapten DNP. Since these lines are identical for theB major histocompatibility complex by serological and functional tests, these results imply the existence of differences in levels of immune responsiveness which are apparently non-MHC-associated.
    Type of Medium: Electronic Resource
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