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1.
Diabetes ; 29(2): 146-50, 1980 Feb.
Article in English | MEDLINE | ID: mdl-6986300

ABSTRACT

Spleen cells from conventional BALB/c or athymic mice with streptozotocin (SZ)-induced hyperglycemia failed to raise blood sugar levels when injected into athymic or thymus-sufficient recipients. Passive transfer efforts were unsuccessful despite variations in donor-recipient pairs with respect to age, thymic function, or time after sensitization of donor mice. Athymic mice develop hyperglycemia following SZ but fail to mount an inflammatory lymphocyte infiltration. In contrast, the heterozygotes show a marked cellular response, which seems to follow the onset of hyperglycemia. The injection of spleen cells from thymus-sufficient mice to athymic recipients confers immunologic competence on the latter as tested by antibody formation to sheep erythrocytes.


Subject(s)
Diabetes Mellitus, Experimental/physiopathology , Spleen/transplantation , Animals , Blood Glucose/metabolism , Diabetes Mellitus, Experimental/pathology , Heterozygote , Immunoenzyme Techniques , Islets of Langerhans/pathology , Mice , Mice, Inbred BALB C , Mice, Nude , Species Specificity , Transplantation, Homologous
4.
Int Arch Allergy Appl Immunol ; 58(3): 302-12, 1979.
Article in English | MEDLINE | ID: mdl-422287

ABSTRACT

Wistar-Furth rats were injected with the anticomplementary cobra venom factor at the time of challenge with the Gross-virus-induced (C58NT)D lymphoma. Complement depletion and/or activation of the complement system in these animals led to the following findings: Multiplication of the tumor cells in vivo was accelerated and mortality rates were enhanced. In addition, serum levels of the immunoglobulins which mediate antibody-dependent cellular cytotoxicity were depressed.


Subject(s)
Elapid Venoms/pharmacology , Lymphoma/immunology , AKR murine leukemia virus , Animals , Antibody-Dependent Cell Cytotoxicity , Cell Transformation, Neoplastic , Complement C3/deficiency , Lymphoma/mortality , Male , Rats , Rats, Inbred WF , Time Factors
5.
J Immunol ; 121(5): 2048-51, 1978 Nov.
Article in English | MEDLINE | ID: mdl-712077

ABSTRACT

We have reassessed the effects of CVF administration on the humoral responses to two T-independent immunogens: DNP-Ficoll and DNP-Polyacrylamide. With high immunogen doses, little or no evidence of suppression was found. However, when the immunizing dose was reduced, suppression of both IgG and IgM responses became apparent. As indicated in a previous report, the immunosuppressive effect of CVF on T-dependent responses may result not only from C depletion but also from the generation of C cleavage products that may impair the auxiliary contribution of macrophages to the generation of these humoral responses. A similar mechanism may be applicable to the suppression of antibody production to DNP-Ficoll and DNP-PAA in view of recent reports showing a macrophage requirement for the response to these immunogens.


Subject(s)
Acrylamides/immunology , Dinitrobenzenes/immunology , Elapid Venoms/pharmacology , Ficoll/immunology , Immunosuppression Therapy , Nitrobenzenes/immunology , Polysaccharides/immunology , Animals , Dose-Response Relationship, Immunologic , Immunoglobulin G/biosynthesis , Immunoglobulin M/biosynthesis , Mice , Mice, Inbred BALB C
6.
J Immunol ; 121(5): 2052-5, 1978 Nov.
Article in English | MEDLINE | ID: mdl-712078

ABSTRACT

CVF administered before immunization can profoundly depress humoral responses in C-sufficient mice. In AKR/JC5- mice given CVF before i.v. immunization with SRBC, only IgG levels were depressed, IgM titers being equivalent to those of untreated controls. The immunosuppressive effect became inapparent when the i.p. route of immunization was adopted. In DBA/2J C5- mice reduction of both IgG and IgM titers was observed irrespective of the route of immunization. The degree of suppression was, however, much more marked when mice were challenged intravenously. Essentially identical results were obtained with C5+ DBA/1J mice. These studies indicate that immunosuppression by CVF is unrelated to activation of the late C components. The significance of these findings is discussed with reference to the possibility that the generation of biologically active C fragments in conjunction with a C3 deficiency may account for immunosuppression by CVF.


Subject(s)
Complement C5/deficiency , Elapid Venoms/pharmacology , Erythrocytes/immunology , Immunosuppression Therapy , Animals , Immunoglobulin G/biosynthesis , Immunoglobulin M/biosynthesis , Male , Mice , Mice, Inbred AKR , Mice, Inbred DBA , Sheep , Time Factors
8.
J Immunol ; 121(5): 2043-7, 1978 Nov.
Article in English | MEDLINE | ID: mdl-81862

ABSTRACT

The immunosuppressive activity of CVF was evaluated in mice immunized with sheep erythrocytes and dinitrophenylated proteins. Serum antibody levels to these immunogens were estimated in activity units and on a weight basis for IgG. IgM as well as IgG antibody responses were diminished in mice pretreated with CVF. However, when soluble immunogens were incorporated in CFA the suppressive effect associated with CVF was inapparent. It is suggested that C depletion per se may not fully account for the observed immunosuppression. The latter may result not only from the depression of C3 levels but also from the biologic activities of C cleavage products some of which modulate the secretory functions and state of activation of macrophages.


Subject(s)
Elapid Venoms/pharmacology , Erythrocytes/immunology , Immunoglobulin G/biosynthesis , Immunoglobulin M/biosynthesis , Immunosuppression Therapy , Animals , Cattle , Complement C3 , Complement System Proteins , Dinitrobenzenes/immunology , Dose-Response Relationship, Immunologic , Female , Male , Mice , Mice, Inbred BALB C , Serum Albumin/immunology , Sheep , Time Factors , gamma-Globulins/immunology
11.
J Immunol Methods ; 22(1-2): 175-90, 1978.
Article in English | MEDLINE | ID: mdl-670725

ABSTRACT

A method is described for estimating early mouse IgG antibodies to the dinitrophenyl (DNP) determinant in absolute weight units. The antibodies to be measured are adsorbed quantitatively onto an appropriate immunoadsorbent such as DNP polyacrylamide. The particulate immune complexes are then incubated with a standard dilution of a potent rabbit antiserum to mouse IgG. Removal of the rabbit anti-mouse IgG (RaM) immunoglobulins by the complexes decreases the C fixing ability of the RaM supernatants reacted with C and mouse IgG. The decrements in C fixation are linearly related to the logarithm of the weight of mouse IgG. The decrements in C fixation are linearly related to the logarithm of the weight of mouse IgG anti DNP added to the immunoadsorbent. A calibration curve is constructed with known amounts of mouse IgG )anti-NDP as measured by quantitative precipitation. Concurrent assays with the early mouse anti-DNP sera permit conversion of the losses in C fixing potencies to weight units of mouse IgG anti-DNP by interpolation on the calibration curve.


Subject(s)
Antibodies , Antigens , Animals , Antibody Specificity , Complement Fixation Tests , Complement System Proteins , Dose-Response Relationship, Immunologic , Humans , Immunosorbents , Mice , Rabbits , Sheep , Solubility
12.
Int Arch Allergy Appl Immunol ; 55(1-6): 297-308, 1977.
Article in English | MEDLINE | ID: mdl-591098

ABSTRACT

Weanling W/Fu rats were inoculated intraperitoneally with 1 X 10(6) to 1 X 10(7) (C58NT)D Gross virus-induced lymphoma cells. Sera obtained 7 days later showed moderate to marked depressions of overall hemolytic activity, C1, C3 and properdin. These changes were not observed in uninjected W/Fu rats or in animals inoculated with syngeneic normal spleen cells. In the latter group and in the tumor-bearing animals, factor B levels were also depressed. Evidence of complement utilization was also observed in the ascitic fluids of the tumor-bearing W/Fu rats.


Subject(s)
Complement System Proteins , Leukemia, Experimental/immunology , AKR murine leukemia virus/immunology , Animals , Complement C1/biosynthesis , Complement C3/biosynthesis , Complement Factor B/biosynthesis , Hemolysis , Properdin/biosynthesis , Rabbits , Rats , Rats, Inbred WF
13.
J Immunol ; 116(1): 188-93, 1976 Jan.
Article in English | MEDLINE | ID: mdl-812914

ABSTRACT

The interaction of guinea pig or rat serum with Z at 0 degrees C leads to the formation of properdin pathway intermediate, ZPI, whose activity is assessed by its capacity to deplete the titer of cobra venom inducible lysis in diluted rat serum. The formation of ZPI does not require C1 or C2 and is not diminished by prior absorption of the serum with Z. In contrast, removal of P suppresses ZPI formation. Both Ca++ and Mg++ are essential cofactors for the formation of this intermediate whose function is abrogated in the presence of anti-C3, anti-P, but not by anti-Factor B. Since C4-deficient guinea pig serum is also effective in ZPI formation, the data suggest that ZPI is an alternative pathway intermediate containing both P and C3.


Subject(s)
Cold Temperature , Properdin/physiology , Zymosan/blood , Animals , Calcium/pharmacology , Cations, Divalent , Egtazic Acid/pharmacology , Hemolysis , Humans , Magnesium/pharmacology , Male , Rats , Snake Venoms/pharmacology
14.
J Immunol ; 115(3): 884-8, 1975 Sep.
Article in English | MEDLINE | ID: mdl-807649

ABSTRACT

Mg++, Mn++ and Co++ activate the C system as judged by the reduction in cobra venom factor indeed hemolysis, and cleavage of properdin factor B and C3. The maximum effect requires the addition of 5 to 10 mM of these cations to dialyzed sera respond in similar fashion indicating that these divalent cations can trigger the alternative pathway without the addition other activating agents.


Subject(s)
Cations, Divalent/pharmacology , Complement System Proteins/metabolism , Properdin/metabolism , Animals , Blood Coagulation Factors/isolation & purification , Calcium , Carboxymethylcellulose Sodium , Chromatography, Affinity , Chromatography, DEAE-Cellulose , Cobalt/pharmacology , Complement C3/metabolism , Dextrans , Edetic Acid , Egtazic Acid , Guinea Pigs , Hemolysis/drug effects , Humans , Immune Sera , Immunoelectrophoresis , Magnesium/pharmacology , Manganese/pharmacology , Rabbits/immunology , Rats , Serum Globulins/analysis , Snakes , Venoms
15.
Proc Soc Exp Biol Med ; 149(3): 628-32, 1975 Jul.
Article in English | MEDLINE | ID: mdl-1144453

ABSTRACT

Antibodies to the dinitrophenyl determinant as estimated by a modified antigen-binding procedure have been found in the sera of all guinea pigs with contact sensitivity to DNCB. The humoral as well as the dermal responses were detectable within 7 days after immunization and persisted for at least 10 wk.


Subject(s)
Antibody Formation , Dermatitis, Contact , Dinitrochlorobenzene/immunology , Nitrobenzenes/immunology , Animals , Binding Sites, Antibody , Blood Specimen Collection , Female , Freund's Adjuvant , Guinea Pigs , Immune Adherence Reaction , Immunization , Iodine Radioisotopes , Male , Time Factors
16.
Proc Soc Exp Biol Med ; 149(3): 633-7, 1975 Jul.
Article in English | MEDLINE | ID: mdl-1144454

ABSTRACT

The anti-DNP response to DNP-BGG is substantially suppressed in guinea pigs sensitized to DNCB. The degree of antibody suppression varies with the mode of skin sensitization and with the degree of conjugation of the challenging immunogen. Suppression of the anti-HSA response was also induced by the prior injection of CFA.


Subject(s)
Cross Reactions , Dinitrochlorobenzene/immunology , Dinitrophenols/immunology , Immunosuppression Therapy , Nitrobenzenes/immunology , Animals , Antibody Formation , Binding Sites, Antibody , Cattle/immunology , Dermatitis, Contact , Freund's Adjuvant/immunology , Guinea Pigs , Immune Adherence Reaction , Immunoglobulin G , Male , Serum Albumin/immunology
17.
Proc Soc Exp Biol Med ; 149(3): 604-9, 1975 Jul.
Article in English | MEDLINE | ID: mdl-806922

ABSTRACT

Antibodies in the sera of guinea pigs immunized with DNCB were detected by Ouchterlony-type analyses and were estimated in weight units by the mABC procedure. Assays of these sera by means of passive cutaneous anaphylaxis, passive hemolysis, or the ABC-33 antigen-binding technique were essentially negative. The validity of the mABC analyses was established by comparison of results obtained in quantitative precipitation studies with sera of guinea pigs immunized with DNP-BGG. In these instances, also, the ABC-33 assays failed to detect all the anti-DNP immunoglobulins.


Subject(s)
Antibodies/analysis , Binding Sites, Antibody , Dinitrochlorobenzene/immunology , Immune Adherence Reaction , Nitrobenzenes/immunology , Animals , Guinea Pigs , Hemolysis , Immunization , Immunodiffusion , Immunologic Techniques , Passive Cutaneous Anaphylaxis , Precipitin Tests
18.
J Immunol ; 114(4): 1243-7, 1975 Apr.
Article in English | MEDLINE | ID: mdl-1090670

ABSTRACT

Serum which protects rats against Plasmodium berghei infections fails to sensitize parasitized erythrocytes in vitro for in vivo destruction. Further, the efflux of 86Rb from parasitized erythrocytes in the presence of complement is not accelerated. On administration to animals with preexisting malaria, it does, however, produce a relatively slow decline in parasitemia, a phenomenon interpreted in terms of the gradual production and/or release of reactive antigenic determinants associated with maturation of the parasites. Protective activity is elaborated in the serum of animals during the development of parasitemia, thus creating a situation in which there is apparently the coincident presence of antibody and its putative antigen in the circulation. Little absorption of protective activity by parasitized cells or parasites was observed in vitro. However, in vivo removal of the protective activity during an ongoing infection could be demonstrated. These observations favor the notion that protective antibody exerts its influence not on the bulk of the parasitized erythrocytes, but rather on some subpopulation thereof. The cumulative evidence of this and other studies suggests that the stage(s) involved are the schizonts and/or merozoites.


Subject(s)
Antibody Formation , Malaria/immunology , Plasmodium berghei/immunology , Absorption , Animals , Erythrocytes/parasitology , Hemolysis , Immune Sera/administration & dosage , Immunity , Immunoglobulin G , Injections, Intravenous , Iodine Radioisotopes , Male , Osmotic Pressure , Rabbits/immunology , Radioisotopes , Rats , Rats, Inbred Strains , Rubidium
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