PMID- 23397251 OWN - NLM STAT- MEDLINE DCOM- 20130924 LR - 20211021 IS - 1573-0832 (Electronic) IS - 0301-486X (Linking) VI - 175 IP - 3-4 DP - 2013 Apr TI - Patients with chronic-form paracoccidioidomycosis present high serum levels of IgE anti-paracoccidioides brasiliensis Gp70. PG - 307-13 LID - 10.1007/s11046-013-9624-5 [doi] AB - Paracoccidioidomycosis (PCM) is a disease caused by the Paracoccidioides genus, which includes P. brasiliensis and the new phylogenetic species P. lutzii. Resistance to this infection has been correlated with a Th1 pattern of cellular immune response, while susceptibility is correlated to an intense humoral immune response with an increase in IgE levels. Serum levels of IgE and IgG anti-gp70 and anti-exoantigen in chronic PCM were analyzed by enzyme-linked immunosorbent assay. Results showed a higher gp70 concentration in somatic antigen (SA) than in cell-free antigen (CFA) preparation and significantly higher levels of IgE and IgG anti-gp70 in chronic PCM patients' serum (n = 12) than in normal human serum (n = 12) (p < 0.05). Pearson's correlation analysis showed a strong correlation between IgG and IgE anti-gp70 (r = 0.8424). Additionally, IgE purified from a pool of acute and chronic PCM patient's serum was analyzed by immunoblotting. The patients with the acute form of the disease showed strong bands for gp43 and gp70 in SA but only for gp43 in CFA. In patients with the chronic form, solely the gp43 band was observed. In conclusion, we found that SA is a better source of gp70 than CFA is, and chronic PCM patients show high levels of IgE anti-gp70. This finding suggests that the Th2 immune response is potentially induced by gp70 in PCM disease, which calls for further study. FAU - Rigobello, F F AU - Rigobello FF AD - Department of Pathologic Sciences, State University of Londrina (UEL), Londrina, PR, Brazil. fabianarigobello@hotmail.com FAU - Marquez, A S AU - Marquez AS FAU - Lopes, J D AU - Lopes JD FAU - Nakanishi-Ito, F A AU - Nakanishi-Ito FA FAU - Itano, E N AU - Itano EN LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130209 PL - Netherlands TA - Mycopathologia JT - Mycopathologia JID - 7505689 RN - 0 (Antibodies, Fungal) RN - 0 (Antigens, Fungal) RN - 0 (Immunoglobulin G) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Antibodies, Fungal/*blood MH - Antigens, Fungal/immunology MH - Chronic Disease MH - Enzyme-Linked Immunosorbent Assay MH - Humans MH - Immunoblotting MH - Immunoglobulin E/*blood MH - Immunoglobulin G/blood MH - Male MH - Paracoccidioides/*immunology MH - Paracoccidioidomycosis/*immunology MH - Serum/immunology EDAT- 2013/02/12 06:00 MHDA- 2013/09/26 06:00 CRDT- 2013/02/12 06:00 PHST- 2012/06/28 00:00 [received] PHST- 2013/01/25 00:00 [accepted] PHST- 2013/02/12 06:00 [entrez] PHST- 2013/02/12 06:00 [pubmed] PHST- 2013/09/26 06:00 [medline] AID - 10.1007/s11046-013-9624-5 [doi] PST - ppublish SO - Mycopathologia. 2013 Apr;175(3-4):307-13. doi: 10.1007/s11046-013-9624-5. Epub 2013 Feb 9.