PMID- 35922705 OWN - NLM STAT- MEDLINE DCOM- 20221122 LR - 20221122 IS - 1573-0832 (Electronic) IS - 0301-486X (Linking) VI - 187 IP - 5-6 DP - 2022 Dec TI - The Impact of Paracoccidioides spp Infection on Central Nervous System Cell Junctional Complexes. PG - 567-577 LID - 10.1007/s11046-022-00653-6 [doi] AB - Paracoccidioidomycosis (PCM), a systemic mycosis caused by the fungus Paracoccidioides spp. is the most prevalent fungal infection among immunocompetent patients in Latin America. The estimated frequency of central nervous system (CNS) involvement among the human immunodeficiency virus (HIV)/PCM-positive population is 2.5%. We aimed to address the impact of neuroparacoccidioidomycosis (NPCM) and HIV/NPCM co-infection on the tight junctions (TJ) and adherens junction (AJ) proteins of the CNS. Four CNS formalin-fixed paraffin-embedded (FFPE) tissue specimens were studied: NPCM, NPCM/HIV co-infection, HIV-positive without opportunistic CNS infection, and normal brain autopsy (negative control). Immunohistochemistry was used to analyze the endothelial cells and astrocytes expressions of TJ markers: claudins (CLDN)-1, -3, -5 and occludin; AJ markers: beta-catenin and E-cadherin; and pericyte marker: alpha-smooth muscle actin. FFPE CNS tissue specimens were analyzed using the immunoperoxidase assay. CLDN-5 expression in the capillaries of the HIV/NPCM coinfected tissues (mixed clinical form of PCM) was lower than that in the capillaries of the HIV or NPCM monoinfected (chronic clinical form of PCM) tissues. A marked decrease in CLDN-5 expression and a compensatory increase in CLDN-1 expression in the NPCM/HIV co-infection tissue samples was observed. The authors suggest that Paracoccidioides spp. crosses the blood-brain barrier through paracellular pathway, owing to the alteration in the CLDN expression, or inside the macrophages (Trojan horse). CI - (c) 2022. The Author(s), under exclusive licence to Springer Nature B.V. FAU - de Almeida, Sergio Monteiro AU - de Almeida SM AUID- ORCID: 0000-0001-5690-105X AD - Medical Pathology Department, School of Medicine, Universidade Federal do Parana, Curitiba, Parana, Brazil. sergio.ma@ufpr.br. AD - Neuroinfection Outclinic, Hospital de Clinicas, Universidade Federal do Parana, Rua Padre Camargo 280, Curitiba, Parana, 80060-240, Brazil. sergio.ma@ufpr.br. FAU - Kulik, Amanda AU - Kulik A AD - Medical Pathology Department, School of Medicine, Universidade Federal do Parana, Curitiba, Parana, Brazil. FAU - Malaquias, Mineia Alessandra Scaranello AU - Malaquias MAS AD - Laboratorio de Patologia Experimental, Escola de Medicina- Pontificia Universidade Catolica do Parana, Curitiba, Parana, Brazil. FAU - Nagashima, Seigo AU - Nagashima S AD - Laboratorio de Patologia Experimental, Escola de Medicina- Pontificia Universidade Catolica do Parana, Curitiba, Parana, Brazil. FAU - de Paula, Caroline Busatta Vaz AU - de Paula CBV AD - Laboratorio de Patologia Experimental, Escola de Medicina- Pontificia Universidade Catolica do Parana, Curitiba, Parana, Brazil. FAU - Muro, Marisol Dominguez AU - Muro MD AD - Micology Laboratory, Hospital de Clinicas, Universidade Federal do Parana, Curitiba, Parana, Brazil. FAU - de Noronha, Lucia AU - de Noronha L AD - Medical Pathology Department, School of Medicine, Universidade Federal do Parana, Curitiba, Parana, Brazil. AD - Laboratorio de Patologia Experimental, Escola de Medicina- Pontificia Universidade Catolica do Parana, Curitiba, Parana, Brazil. LA - eng PT - Journal Article DEP - 20220803 PL - Netherlands TA - Mycopathologia JT - Mycopathologia JID - 7505689 SB - IM MH - Humans MH - *Paracoccidioidomycosis/microbiology MH - *Paracoccidioides MH - *Coinfection MH - Endothelial Cells MH - *Central Nervous System Fungal Infections/microbiology MH - Central Nervous System MH - *HIV Infections/complications OTO - NOTNLM OT - Adherens junction OT - Central nervous system OT - HIV OT - Paracoccidioides spp. OT - Spinal cord OT - Tight junctions EDAT- 2022/08/04 06:00 MHDA- 2022/11/23 06:00 CRDT- 2022/08/03 23:33 PHST- 2022/03/07 00:00 [received] PHST- 2022/07/12 00:00 [accepted] PHST- 2022/08/04 06:00 [pubmed] PHST- 2022/11/23 06:00 [medline] PHST- 2022/08/03 23:33 [entrez] AID - 10.1007/s11046-022-00653-6 [pii] AID - 10.1007/s11046-022-00653-6 [doi] PST - ppublish SO - Mycopathologia. 2022 Dec;187(5-6):567-577. doi: 10.1007/s11046-022-00653-6. Epub 2022 Aug 3.