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[Morphogenesis of candidiasis granuloma]
Abstract:
Fungi C. albicans killed by various methods were injected intravenously to mice resulting in the granuloma formation in the liver and spleen. These granulomas were similar to those developing in newborns affected with candidiasis. The components of the fungus cellular wall are responsible for the granuloma development and act as the antigenic material. Polynuclears which are capable of dealing with the antigenic material more actively than mononuclear liver phagocytes, play an essential role as the trigger mechanism in the granuloma formation produced by the killer C. albicans. At the same time long persistence of C. albicans antigenic material in the granulomas proves the deficiency of the phagocytic response directed to the utilization of this material. It is assumed that similar mechanisms are responsible for the morphogenesis of both human candidiasis granulomas and those produced by the killed C. albicans.
Insights
Killed Candida albicans induced granuloma formation in mice, mimicking human candidiasis. Fungal cell wall components and polynuclears are key to this immune response, despite phagocytic deficiencies.
Area of Science:
- Immunology
- Mycology
- Pathology
Background:
- Candida albicans is an opportunistic fungal pathogen.
- Candidiasis can lead to severe infections, particularly in newborns.
- Granuloma formation is a hallmark of chronic inflammatory responses.
Purpose of the Study:
- To investigate the mechanisms of granuloma formation induced by killed Candida albicans in mice.
- To compare experimentally induced granulomas with those observed in human candidiasis.
Main Methods:
- Intravenous injection of killed Candida albicans into mice.
- Histopathological examination of liver and spleen tissues.
- Analysis of cellular components involved in granuloma development.
Main Results:
- Killed Candida albicans induced granulomas in the liver and spleen of mice.
- These granulomas resembled those seen in human neonatal candidiasis.
- Fungal cell wall components were identified as antigenic material driving granuloma formation.
- Polymorphonuclear leukocytes (polynuclears) were crucial in initiating granuloma formation.
- Persistent fungal antigens indicated a deficient phagocytic response.
Conclusions:
- The study elucidates the role of fungal cell wall components and polymorphonuclear leukocytes in granuloma formation.
- Experimental models using killed Candida albicans can mimic human candidiasis-related granulomatous responses.
- Deficiencies in phagocytic response contribute to the persistence of fungal antigens in granulomas.