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Results for “Immune Adherence Reaction”

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At least 19 recordsLinked to original sources
PubMed2001

Leishmania immune adherence reaction in vertebrates.

In normal human blood, C3-opsonized Leishmania promastigotes immune adhere to erythrocytes, a mechanism believed to enhance their clearance from blood and phagocytosis. Given the potential importance of this reaction in host defence against infection, the promastigote-erythrocyte interaction was studied in blood of individuals from one avian and 12 mammalian genera; [111In]-labelled promastigotes were found to bind only to primate erythrocytes. Nevertheless, previous experiments coincubating platelets isolated from nonprimate mammals with C3-opsonized promastigotes led to promastigote-platelet adherence. To ascertain whether this is a natural mechanism in nonprimate Leishmania infection, normal blood from members of Leishmania animal models of interest, dog, guinea-pig, hamster, mouse and rabbit, was infected ex vivo with promastigotes. Within 1 min of blood contact, the promastigote surface was loaded with platelets, rapidly evolving into large aggregates. These results confirm the physiological nature of the reaction and demonstrate that promastigote-erythrocyte and promastigote-platelet binding are the first parasite-host cell encounters after Leishmania invasion of primates and nonprimate mammals, respectively. Leishmania immune adherence shares the characteristics of the nonanticipatory immune systems, and we consider it should be viewed as an innate vertebrate host effector mechanism.

Animals↗
PubMed1981

[Therapeutic action of proteolytic enzymes and antibiotics in experimental staphylococcal infection. The effect of lincomycin, chymotrypsin and their combinations on the level of autoplaque-forming cells in the blood and the immune adherence reaction of staphylococci].

The effect of lincomycin, chymotrypsin and their combination on the blood count of the plaque-autoforming cells (PAFC) and immune adhesion (IA) of staphylococci was studied on mice with staphylococcal infection. The infected mice were divided into 4 groups: nontreated, lincomycin treated, chymotrypsin treated, and lincomycin + chymotrypsin treated. The doses of lincomycin and chymotrypsin were 150 and 2 mg/kg, respectively. The mice were decapitated by the 3rd, 7th, 14th or 21st day of the infection and treatment and the blood was collected for the count of the PAFC and IA. A decrease in the rate of IA with a simultaneous increase in the PAFC count was found in the untreated mice and the mice treated with lincomycin alone. The use of chymotrypsin and its combination with lincomycin stimulated IA and lowered the level of autosensibilization.

Animals↗
PubMed1977

The immune adherence phenomenon in experimental candidiasis.

The immune adherence reaction was shown in experimental candidiasis. This phenomenon has not been previously described for candidiasis, to the best of our knowledge. Forty-eight sera of guinea pigs inoculated with a single or several inoculations of live Candida albicans were tested at different time intervals after inoculation for anti C. albicans antibodies detectable by the immune adherence reaction. From the 14th day after inoculation, a positive immune adherence reaction was observed with titer and strength increasing as time passed after inoculation and as the number of inoculations increased. All the sera were tested parallely in agglutination and indirect mast cell degranulation tests. The significance of the data obtained is discussed.

Agglutination Tests↗