PMID- 17356792 OWN - NLM STAT- MEDLINE DCOM- 20070904 LR - 20181113 IS - 0301-486X (Print) IS - 0301-486X (Linking) VI - 163 IP - 3 DP - 2007 Mar TI - Protection induced in BALB/c mice by the high-molecular-mass (hMM) fraction of Paracoccidioides brasiliensis. PG - 117-28 AB - Paracoccidioidomycosis (PCM) is a granulomatous disease caused by a dimorphic fungus, Paracoccidioides brasiliensis. The present study investigated the protective activity of the P. brasiliensis high-molecular-mass (hMM) fraction (approximately 380 kDa) in experimental murine PCM. In the first step, lymphocyte proliferation and production of IFNgamma (but not IL-4) were observed in "in vitro" spleen cells (from female BALB/c mice infected (i.v.) with P. brasiliensis) that were stimulated with hMM fractions. In the second step, female BALB/c mice were previously immunized (s.c.) with hMM fraction (25 microg/protein = F-25 and 50 microg/protein = F-50), and the colony-forming units (CFU) of the lung and spleen, the histopathological characteristics of the granulomatous lesions, and plasmatic gp43 soluble antigens and anti-hMM IgG levels were analyzed at 28 and 56 days after infection. The lung and liver CFU were lower in mice previously immunized with the hMM fraction (P < 0.05). The granulomatous lesions revealed a greater degree of compaction and organization, with no dissemination of the fungus to other organs. Lower soluble antigen levels (P < 0.05) and higher IgG anti-hMM fraction (P < 0.05) were observed in immunized groups. The results for CFU, histopathology and antigenemia suggest that the hMM fraction has a protective effect in experimental paracoccidioidomycosis in BALB/c mice. FAU - Pavanelli, Wander R AU - Pavanelli WR AD - Fundacao Araucaria, Curitiba, PR, Brazil. FAU - Kaminami, Mari S AU - Kaminami MS FAU - Geres, Juliana R AU - Geres JR FAU - Sano, Ayako AU - Sano A FAU - Ono, Mario A AU - Ono MA FAU - Camargo, I C C AU - Camargo IC FAU - Itano, Eiko N AU - Itano EN LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20070314 PL - Netherlands TA - Mycopathologia JT - Mycopathologia JID - 7505689 RN - 0 (43 kDa protein, Paracoccidioides) RN - 0 (Antibodies, Fungal) RN - 0 (Antigens, Fungal) RN - 0 (Cytokines) RN - 0 (Fungal Proteins) RN - 0 (Glycoproteins) RN - 0 (Immunoglobulin G) SB - IM MH - Animals MH - Antibodies, Fungal/blood MH - Antigens, Fungal/blood/*immunology/isolation & purification MH - Chromatography MH - Colony Count, Microbial MH - Cytokines/immunology MH - Female MH - Fungal Proteins/blood MH - Glycoproteins/blood MH - Granuloma/pathology MH - Immunization MH - Immunoglobulin G/blood MH - Liver/microbiology/pathology MH - Lung/microbiology/pathology MH - Mice MH - Mice, Inbred BALB C MH - Paracoccidioides/growth & development/*immunology MH - Paracoccidioidomycosis/*immunology/microbiology/pathology MH - Spleen/cytology/pathology EDAT- 2007/03/16 09:00 MHDA- 2007/09/05 09:00 CRDT- 2007/03/16 09:00 PHST- 2006/10/30 00:00 [received] PHST- 2007/01/29 00:00 [accepted] PHST- 2007/03/16 09:00 [pubmed] PHST- 2007/09/05 09:00 [medline] PHST- 2007/03/16 09:00 [entrez] AID - 10.1007/s11046-007-0095-4 [doi] PST - ppublish SO - Mycopathologia. 2007 Mar;163(3):117-28. doi: 10.1007/s11046-007-0095-4. Epub 2007 Mar 14.