PMID- 28087534 OWN - NLM STAT- MEDLINE DCOM- 20171109 LR - 20181113 IS - 1098-5336 (Electronic) IS - 0099-2240 (Print) IS - 0099-2240 (Linking) VI - 83 IP - 7 DP - 2017 Apr 1 TI - Mechanisms of Horizontal Cell-to-Cell Transfer of Wolbachia spp. in Drosophila melanogaster. LID - 10.1128/AEM.03425-16 [doi] LID - e03425-16 AB - Wolbachia is an intracellular endosymbiont present in most arthropod and filarial nematode species. Transmission between hosts is primarily vertical, taking place exclusively through the female germ line, although horizontal transmission has also been documented. The results of several studies indicate that Wolbachia spp. can undergo transfer between somatic and germ line cells during nematode development and in adult flies. However, the mechanisms underlying horizontal cell-to-cell transfer remain largely unexplored. Here, we establish a tractable system for probing horizontal transfer of Wolbachia cells between Drosophila melanogaster cells in culture using fluorescence in situ hybridization (FISH). First, we show that horizontal transfer is independent of cell-to-cell contact and can efficiently take place through the culture medium within hours. Further, we demonstrate that efficient transfer utilizes host cell phagocytic and clathrin/dynamin-dependent endocytic machinery. Lastly, we provide evidence that this process is conserved between species, showing that horizontal transfer from mosquito to Drosophila cells takes place in a similar fashion. Altogether, our results indicate that Wolbachia utilizes host internalization machinery during infection, and this mechanism is conserved across insect species.IMPORTANCE Our work has broad implications for the control and treatment of tropical diseases. Wolbachia can confer resistance against a variety of human pathogens in mosquito vectors. Elucidating the mechanisms of horizontal transfer will be useful for efforts to more efficiently infect nonnatural insect hosts with Wolbachia as a biological control agent. Further, as Wolbachia is essential for the survival of filarial nematodes, understanding horizontal transfer might provide new approaches to treating human infections by targeting Wolbachia Finally, this work provides a key first step toward the genetic manipulation of Wolbachia. CI - Copyright (c) 2017 American Society for Microbiology. FAU - White, Pamela M AU - White PM AD - Department of Molecular, Cell & Developmental Biology, University of California, Santa Cruz, California, USA. FAU - Pietri, Jose E AU - Pietri JE AD - Department of Molecular, Cell & Developmental Biology, University of California, Santa Cruz, California, USA jose.e.pietri@gmail.com. FAU - Debec, Alain AU - Debec A AD - Jacques Monod Institute, CNRS, Paris Diderot University, Paris, France. FAU - Russell, Shelbi AU - Russell S AD - Department of Molecular, Cell & Developmental Biology, University of California, Santa Cruz, California, USA. FAU - Patel, Bhavin AU - Patel B AD - Department of Molecular, Cell & Developmental Biology, University of California, Santa Cruz, California, USA. FAU - Sullivan, William AU - Sullivan W AD - Department of Molecular, Cell & Developmental Biology, University of California, Santa Cruz, California, USA. LA - eng GR - R01 GM104486/GM/NIGMS NIH HHS/United States GR - R25 GM056765/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20170317 PL - United States TA - Appl Environ Microbiol JT - Applied and environmental microbiology JID - 7605801 RN - 0 (Clathrin) RN - EC 3.6.5.5 (Dynamins) SB - IM MH - Animals MH - Clathrin/metabolism MH - Drosophila melanogaster/*cytology/*microbiology/physiology MH - Dynamins/metabolism MH - Germ Cells/microbiology MH - In Situ Hybridization, Fluorescence MH - Wolbachia/cytology/*physiology PMC - PMC5359480 OTO - NOTNLM OT - Drosophila OT - Wolbachia OT - endocytosis OT - entry OT - horizontal OT - invasion OT - phagocytosis OT - transfer OT - transmission EDAT- 2017/01/15 06:00 MHDA- 2017/11/10 06:00 PMCR- 2017/09/17 CRDT- 2017/01/15 06:00 PHST- 2016/12/22 00:00 [received] PHST- 2017/01/10 00:00 [accepted] PHST- 2017/01/15 06:00 [pubmed] PHST- 2017/11/10 06:00 [medline] PHST- 2017/01/15 06:00 [entrez] PHST- 2017/09/17 00:00 [pmc-release] AID - AEM.03425-16 [pii] AID - 03425-16 [pii] AID - 10.1128/AEM.03425-16 [doi] PST - epublish SO - Appl Environ Microbiol. 2017 Mar 17;83(7):e03425-16. doi: 10.1128/AEM.03425-16. Print 2017 Apr 1.