PMID- 34579213 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240214 IS - 2076-393X (Print) IS - 2076-393X (Electronic) IS - 2076-393X (Linking) VI - 9 IP - 9 DP - 2021 Aug 31 TI - P80 Natural Essence Exerts Efficient Anti-HIV-1- as Well as Adjuvant Effects in DCs. LID - 10.3390/vaccines9090976 [doi] LID - 976 AB - Dendritic cells (DCs), as well as complement, play a major role during human immunodeficiency virus 1 (HIV-1) entry and infection at mucosal sites. Together, DCs and complement are key points for understanding host defence against HIV-1 infection and for studying the impact of new drugs on the regulation of innate host-pathogen interactions and adaptive immunity. For this, we evaluated the antiviral effect of the P80 natural essence (Longan extract) on interactions of non- and complement-opsonized HIV-1 with DCs. In viability assays, we first illustrated the effects of P80 natural essence on DC function. We found that P80 concentrations above 1.5% caused increased cell death, while at concentrations between 0.5% and 1% the compound exerted efficient antiviral effects in DCs and illustrated an adjuvant effect regarding DC activation. DC maturation, as well as co-stimulatory capacity, were significantly improved by P80 natural essence via p38 MAPK phosphorylation in presence of the viral challenge independent of the opsonization pattern. These findings might be exploited for future therapeutic options to target DC subsets directly at mucosal sites by P80 natural essence and to block entry of both, non- and complement-opsonized HIV-1. FAU - Zaderer, Viktoria AU - Zaderer V AUID- ORCID: 0000-0002-0507-0513 AD - Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, 6020 Innsbruck, Austria. FAU - Posch, Wilfried AU - Posch W AUID- ORCID: 0000-0001-8955-7654 AD - Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, 6020 Innsbruck, Austria. FAU - Gstir, Ronald AU - Gstir R AD - ADSI-Austrian Drug Screening Institute GmbH, 6020 Innsbruck, Austria. FAU - Filipek, Przemyslaw A AU - Filipek PA AUID- ORCID: 0000-0003-3125-4532 AD - ADSI-Austrian Drug Screening Institute GmbH, 6020 Innsbruck, Austria. FAU - Bonn, Gunther K AU - Bonn GK AD - ADSI-Austrian Drug Screening Institute GmbH, 6020 Innsbruck, Austria. FAU - Aramwit, Pornanong AU - Aramwit P AD - Department of Pharmacy Practice, Faculty of Pharmaceutical Sciences and Center of Excellence in Bioactive Resources for Innovative Clinical Applications, Chulalongkorn University, Bangkok 10330, Thailand. FAU - Huber, Lukas A AU - Huber LA AUID- ORCID: 0000-0003-1116-2120 AD - ADSI-Austrian Drug Screening Institute GmbH, 6020 Innsbruck, Austria. AD - Institute of Cell Biology, Biocenter Innsbruck, Medical University of Innsbruck, 6020 Innsbruck, Austria. FAU - Wilflingseder, Doris AU - Wilflingseder D AUID- ORCID: 0000-0002-5888-5118 AD - Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, 6020 Innsbruck, Austria. LA - eng GR - DOC 82/FWF_/Austrian Science Fund FWF/Austria GR - P 33510/FWF_/Austrian Science Fund FWF/Austria GR - P33510-B13/FWF_/Austrian Science Fund FWF/Austria PT - Journal Article DEP - 20210831 PL - Switzerland TA - Vaccines (Basel) JT - Vaccines JID - 101629355 PMC - PMC8472994 OTO - NOTNLM OT - HIV-1 OT - P80 natural essence OT - complement OT - dendritic cells COIS- No competing interests or conflicts of interest to declare. The study design, analysis, interpretation and conclusions were not influenced by the funding organizations. EDAT- 2021/09/29 06:00 MHDA- 2021/09/29 06:01 PMCR- 2021/08/31 CRDT- 2021/09/28 01:28 PHST- 2021/04/06 00:00 [received] PHST- 2021/08/18 00:00 [revised] PHST- 2021/08/26 00:00 [accepted] PHST- 2021/09/28 01:28 [entrez] PHST- 2021/09/29 06:00 [pubmed] PHST- 2021/09/29 06:01 [medline] PHST- 2021/08/31 00:00 [pmc-release] AID - vaccines9090976 [pii] AID - vaccines-09-00976 [pii] AID - 10.3390/vaccines9090976 [doi] PST - epublish SO - Vaccines (Basel). 2021 Aug 31;9(9):976. doi: 10.3390/vaccines9090976.