PMID- 27312247 OWN - NLM STAT- MEDLINE DCOM- 20170823 LR - 20181202 IS - 1469-8161 (Electronic) IS - 0031-1820 (Linking) VI - 143 IP - 12 DP - 2016 Oct TI - Treatment with synthetic lipophilic tyrosyl ester controls Leishmania major infection by reducing parasite load in BALB/c mice. PG - 1615-21 LID - 10.1017/S0031182016001086 [doi] AB - Synthesized lipophilic tyrosyl ester derivatives with increasing lipophilicity were effective against Leishmania (L.) major and Leishmania infantum species in vitro. These findings prompted us to test in vivo leishmanicidal properties of these molecules and their potential effect on the modulation of immune responses. The experimental BALB/c model of cutaneous leishmaniasis was used in this study. Mice were infected with L. major parasites and treated with three in vitro active tyrosyl esters derivatives. Among these tested tyrosylcaprate (TyC) compounds, only TyC10 exhibited an in vivo anti-leishmanial activity, when injected sub-cutaneously (s.c.). TyC10 treatment of L. major-infected BALB/c mice resulted in a decrease of lesion development and parasite load. TyC10 s.c. treatment of non-infected mice induced an imbalance in interferon gamma/interleukin 4 (IFN-gamma/IL-4) ratio cytokines towards a Th1 response. Our results indicate that TyC10 s.c. treatment improves lesions' healing and parasite clearance and may act on the cytokine balance towards a Th1 protective response by decreasing IL-4 and increasing IFN-gamma transcripts. TyC10 is worthy of further investigation to uncover its mechanism of action that could lead to consider this molecule as a potential drug candidate. FAU - Sghaier, Rabiaa M AU - Sghaier RM AD - Laboratory of Transmission, Control and Immunobiology of Infections (LTCII),Institut Pasteur de Tunis,LR11IPT02, Tunis-Belvedere, 1002,Tunisia. FAU - Aissa, Imen AU - Aissa I AD - Laboratoire de Biochimie et de Genie Enzymatique des Lipases,Ecole Nationale d'Ingenieurs de Sfax (ENIS), Universite de Sfax,Route de Soukra,BP 1173, 3038 Sfax,Tunisie. FAU - Attia, Hanene AU - Attia H AD - Laboratory of Transmission, Control and Immunobiology of Infections (LTCII),Institut Pasteur de Tunis,LR11IPT02, Tunis-Belvedere, 1002,Tunisia. FAU - Bali, Aymen AU - Bali A AD - Laboratory of Transmission, Control and Immunobiology of Infections (LTCII),Institut Pasteur de Tunis,LR11IPT02, Tunis-Belvedere, 1002,Tunisia. FAU - Leon Martinez, Pablo A AU - Leon Martinez PA AD - Laboratory of Transmission, Control and Immunobiology of Infections (LTCII),Institut Pasteur de Tunis,LR11IPT02, Tunis-Belvedere, 1002,Tunisia. FAU - Mkannez, Ghada AU - Mkannez G AD - Laboratory of Transmission, Control and Immunobiology of Infections (LTCII),Institut Pasteur de Tunis,LR11IPT02, Tunis-Belvedere, 1002,Tunisia. FAU - Guerfali, Fatma Z AU - Guerfali FZ AD - Laboratory of Transmission, Control and Immunobiology of Infections (LTCII),Institut Pasteur de Tunis,LR11IPT02, Tunis-Belvedere, 1002,Tunisia. FAU - Gargouri, Youssef AU - Gargouri Y AD - Laboratoire de Biochimie et de Genie Enzymatique des Lipases,Ecole Nationale d'Ingenieurs de Sfax (ENIS), Universite de Sfax,Route de Soukra,BP 1173, 3038 Sfax,Tunisie. FAU - Laouini, Dhafer AU - Laouini D AD - Laboratory of Transmission, Control and Immunobiology of Infections (LTCII),Institut Pasteur de Tunis,LR11IPT02, Tunis-Belvedere, 1002,Tunisia. LA - eng PT - Journal Article DEP - 20160617 PL - England TA - Parasitology JT - Parasitology JID - 0401121 RN - 0 (Antiprotozoal Agents) RN - 0 (Cytokines) RN - 0 (Immunologic Factors) RN - 42HK56048U (Tyrosine) SB - IM MH - Animals MH - Antiprotozoal Agents/*administration & dosage MH - Cytokines/metabolism MH - Disease Models, Animal MH - Immunologic Factors/*administration & dosage MH - Injections, Subcutaneous MH - Leishmania major/*drug effects MH - Leishmaniasis, Cutaneous/*drug therapy MH - Mice MH - Mice, Inbred BALB C MH - Parasite Load MH - Th1 Cells/immunology MH - Tyrosine/analogs & derivatives/pharmacology OTO - NOTNLM OT - Leishmania major OT - anti-leishmanial activity OT - lipophilic tyrosyl ester OT - parasite load EDAT- 2016/06/18 06:00 MHDA- 2017/08/24 06:00 CRDT- 2016/06/18 06:00 PHST- 2016/06/18 06:00 [entrez] PHST- 2016/06/18 06:00 [pubmed] PHST- 2017/08/24 06:00 [medline] AID - S0031182016001086 [pii] AID - 10.1017/S0031182016001086 [doi] PST - ppublish SO - Parasitology. 2016 Oct;143(12):1615-21. doi: 10.1017/S0031182016001086. Epub 2016 Jun 17.