Abstract
Tetraspanins co-emerged with multi-cellular organisms during evolution are typically localized at the cell–cell interface, and form tetraspanin-enriched microdomains (TEMs) by associating with each other and other membrane molecules. Tetraspanins affect various biological functions, but how tetraspanins engage in multi-faceted functions at the cellular level is largely unknown. When cells interact, the membrane microextrusions at the cell–cell interfaces form dynamic, digit-like structures between cells, which we term digitation junctions (DJs). We found that (1) tetraspanins CD9, CD81, and CD82 and (2) TEM-associated molecules integrin α3β1, CD44, EWI2/PGRL, and PI-4P are present in DJs of epithelial, endothelial, and cancer cells. Tetraspanins and their associated molecules also regulate the formation and development of DJs. Moreover, (1) actin cytoskeleton, RhoA, and actomyosin activities and (2) growth factor receptor-Src-MAP kinase signaling, but not PI-3 kinase, regulate DJs. Finally, we showed that DJs consist of various forms in different cells. Thus, DJs are common, interactive structures between cells, and likely affect cell adhesion, migration, and communication. TEMs probably modulate various cell functions through DJs. Our findings highlight that DJ morphogenesis reflects the transition between cell–matrix adhesion and cell–cell adhesion and involves both cell–cell and cell–matrix adhesion molecules.










Similar content being viewed by others
Change history
08 September 2018
In the original publication, abstract text, one of the co-author’s name and the legend to Table 1 were incorrectly published.
Abbreviations
- DJ:
-
Digitation junction
- DMEM:
-
Dulbecco’s modified eagle medium
- FCS:
-
Fetal calf serum
- GAMMA:
-
Global microarray meta-analysis
- GEO:
-
Gene expression omnibus
- HGF:
-
Hepatocyte growth factor
- HMEC:
-
Human microvascular endothelial cell
- IF:
-
Intermediate filament
- mAb:
-
Monoclonal antibody
- MβCD:
-
Methyl beta cyclodextrin
- Memtubs:
-
Membrane tubular structures
- MLCK:
-
Myosin light chain kinase
- pAb:
-
Polyclonal antibody
- TEMs:
-
Tetraspanin-enriched microdomains
- TIRF:
-
Total internal reflection fluorescence
References
Horejsi V, Vlcek C (1991) Novel structurally distinct family of leucocyte surface glycoproteins including CD9, CD37, CD53 and CD63. FEBS Lett 288:1–4
Wright MD, Tomlinson MG (1994) The ins and outs of the transmembrane 4 superfamily. Immunol Today 15:588–594. https://doi.org/10.1016/0167-5699(94)90222-4
Maecker HT, Todd SC, Levy S (1997) The tetraspanin superfamily: molecular facilitators. FASEB J 11:428–442
Boucheix C, Rubinstein E (2001) Tetraspanins. Cell Mol Life Sci 58:1189–1205. https://doi.org/10.1007/PL00000933
Hemler ME (2005) Tetraspanin functions and associated microdomains. Nat Rev Mol Cell Biol 6:801–811. https://doi.org/10.1038/nrm1736
Yanez-Mo M, Barreiro O, Gordon-Alonso M, Sala-Valdes M, Sanchez-Madrid F (2009) Tetraspanin-enriched microdomains: a functional unit in cell plasma membranes. Trends Cell Biol 19:434–446. https://doi.org/10.1016/j.tcb.2009.06.004
Garcia-Espana A et al (2008) Appearance of new tetraspanin genes during vertebrate evolution. Genomics 91:326–334. https://doi.org/10.1016/j.ygeno.2007.12.005
Huang S et al (2005) The phylogenetic analysis of tetraspanins projects the evolution of cell–cell interactions from unicellular to multicellular organisms. Genomics 86:674–684. https://doi.org/10.1016/j.ygeno.2005.08.004
Vasioukhin V, Bauer C, Yin M, Fuchs E (2000) Directed actin polymerization is the driving force for epithelial cell–cell adhesion. Cell 100:209–219
Jacinto A et al (2000) Dynamic actin-based epithelial adhesion and cell matching during Drosophila dorsal closure. Curr Biol 10:1420–1426
Raich WB, Agbunag C, Hardin J (1999) Rapid epithelial-sheet sealing in the Caenorhabditis elegans embryo requires cadherin-dependent filopodial priming. Curr Biol 9:1139–1146. https://doi.org/10.1016/S0960-9822(00)80015-9
Singethan K et al (2008) CD9 clustering and formation of microvilli zippers between contacting cells regulates virus-induced cell fusion. Traffic 9:924–935. https://doi.org/10.1111/j.1600-0854.2008.00737.x
Zhang F et al (2011) Tetraspanin CD151 maintains vascular stability by balancing the forces of cell adhesion and cytoskeletal tension. Blood 118:4274–4284. https://doi.org/10.1182/blood-2011-03-339531
Bari R et al (2011) Tetraspanins regulate the protrusive activities of cell membrane. Biochem Biophys Res Commun 415:619–626. https://doi.org/10.1016/j.bbrc.2011.10.121
Zhang XA, Huang C (2012) Tetraspanins and cell membrane tubular structures. Cell Mol Life Sci 69:2843–2852. https://doi.org/10.1007/s00018-012-0954-0
Shigeta M et al (2003) CD151 regulates epithelial cell–cell adhesion through PKC- and Cdc42-dependent actin cytoskeletal reorganization. J Cell Biol 163:165–176. https://doi.org/10.1083/jcb.200301075
Zevian SC et al (2015) CD151 promotes alpha3beta1 integrin-dependent organization of carcinoma cell junctions and restrains collective cell invasion. Cancer Biol Ther 16:1626–1640. https://doi.org/10.1080/15384047.2015.1095396
Zhang XA, He B, Zhou B, Liu L (2003) Requirement of the p130CAS-Crk coupling for metastasis suppressor KAI1/CD82-mediated inhibition of cell migration. J Biol Chem 278:27319–27328. https://doi.org/10.1074/jbc.M303039200
Stipp CS, Kolesnikova TV, Hemler ME (2001) EWI-2 is a major CD9 and CD81 partner and member of a novel Ig protein subfamily. J Biol Chem 276:40545–40554. https://doi.org/10.1074/jbc.M107338200
Zhang XA, Lane WS, Charrin S, Rubinstein E, Liu L (2003) EWI2/PGRL associates with the metastasis suppressor KAI1/CD82 and inhibits the migration of prostate cancer cells. Cancer Res 63:2665–2674
Charrin S et al (2003) EWI-2 is a new component of the tetraspanin web in hepatocytes and lymphoid cells. Biochem J 373:409–421. https://doi.org/10.1042/BJ20030343
Sala-Valdes M et al (2006) EWI-2 and EWI-F link the tetraspanin web to the actin cytoskeleton through their direct association with ezrin-radixin-moesin proteins. J Biol Chem 281:19665–19675. https://doi.org/10.1074/jbc.M602116200
Krugmann S et al (2001) Cdc42 induces filopodia by promoting the formation of an IRSp53: mena complex. Curr Biol 11:1645–1655
Ballestrem C, Wehrle-Haller B, Hinz B, Imhof BA (2000) Actin-dependent lamellipodia formation and microtubule-dependent tail retraction control-directed cell migration. Mol Biol Cell 11:2999–3012
He B et al (2011) Differential functions of phospholipid binding and palmitoylation of tumour suppressor EWI2/PGRL. Biochem J 437:399–411. https://doi.org/10.1042/BJ20101381
Garcia JG et al (1999) Regulation of endothelial cell myosin light chain kinase by Rho, cortactin, and p60(src). Am J Physiol 276:L989–L998
Barraud-Lange V et al (2012) Membrane transfer from oocyte to sperm occurs in two CD9-independent ways that do not supply the fertilising ability of Cd9-deleted oocytes. Reproduction 144:53–66. https://doi.org/10.1530/REP-12-0040
Barraud-Lange V, Naud-Barriant N, Bomsel M, Wolf JP, Ziyyat A (2007) Transfer of oocyte membrane fragments to fertilizing spermatozoa. FASEB J 21:3446–3449. https://doi.org/10.1096/fj.06-8035hyp
Wren JD (2009) A global meta-analysis of microarray expression data to predict unknown gene functions and estimate the literature-data divide. Bioinformatics 25:1694–1701. https://doi.org/10.1093/bioinformatics/btp290
Dozmorov MG, Giles CB, Wren JD (2011) Predicting gene ontology from a global meta-analysis of 1-color microarray experiments. BMC Bioinfo 12(Suppl 10):S14. https://doi.org/10.1186/1471-2105-12-s10-s14
Fisch AS et al (2015) Genetic variation in the platelet endothelial aggregation receptor 1 gene results in endothelial dysfunction. PLoS ONE 10:e0138795. https://doi.org/10.1371/journal.pone.0138795
Gandhapudi SK et al (2015) IL-18 acts in synergy with IL-7 to promote ex vivo expansion of T lymphoid progenitor cells. J Immunol 194:3820–3828. https://doi.org/10.4049/jimmunol.1301542
Towner RA et al (2013) Experimental validation of 5 in silico predicted glioma biomarkers. Neuro Oncol 15:1625–1634. https://doi.org/10.1093/neuonc/not124
Towner RA et al (2013) ELTD1, a potential new biomarker for gliomas. Neurosurgery 72:77–90. https://doi.org/10.1227/neu.0b013e318276b29d
Clemmensen SN et al (2012) Olfactomedin 4 defines a subset of human neutrophils. J Leukoc Biol 91:495–500. https://doi.org/10.1189/jlb.0811417
Lupu C, Zhu H, Popescu NI, Wren JD, Lupu F (2011) Novel protein ADTRP regulates TFPI expression and function in human endothelial cells in normal conditions and in response to androgen. Blood 118:4463–4471. https://doi.org/10.1182/blood-2011-05-355370
Daum JR et al (2009) Ska3 is required for spindle checkpoint silencing and the maintenance of chromosome cohesion in mitosis. Curr Biol 19:1467–1472. https://doi.org/10.1016/j.cub.2009.07.017
Yanagimachi R (1978) Sperm-egg association in animals. Curr Top Dev Biol 12:83–105
Rubinstein E, Ziyyat A, Wolf JP, Le Naour F, Boucheix C (2006) The molecular players of sperm-egg fusion in mammals. Semin Cell Dev Biol 17:254–263. https://doi.org/10.1016/j.semcdb.2006.02.012
Ivetic A et al (2004) Mutagenesis of the ezrin-radixin-moesin binding domain of L-selectin tail affects shedding, microvillar positioning, and leukocyte tethering. J Biol Chem 279:33263–33272. https://doi.org/10.1074/jbc.M312212200
Gerdes HH, Bukoreshtliev NV, Barroso JF (2007) Tunneling nanotubes: a new route for the exchange of components between animal cells. FEBS Lett 581:2194–2201. https://doi.org/10.1016/j.febslet.2007.03.071
Sherer NM, Mothes W (2008) Cytonemes and tunneling nanotubules in cell–cell communication and viral pathogenesis. Trends Cell Biol 18:414–420. https://doi.org/10.1016/j.tcb.2008.07.003
Menter DG et al (1987) Tumor cell-platelet interactions in vitro and their relationship to in vivo arrest of hematogenously circulating tumor cells. Clin Exp Metastasis 5:65–78
Barreiro O et al (2008) Endothelial adhesion receptors are recruited to adherent leukocytes by inclusion in preformed tetraspanin nanoplatforms. J Cell Biol 183:527–542. https://doi.org/10.1083/jcb.200805076
Gillette JM, Larochelle A, Dunbar CE, Lippincott-Schwartz J (2009) Intercellular transfer to signalling endosomes regulates an ex vivo bone marrow niche. Nat Cell Biol 11:303–311. https://doi.org/10.1038/ncb1838
Wang HX, Kolesnikova TV, Denison C, Gygi SP, Hemler ME (2011) The C-terminal tail of tetraspanin protein CD9 contributes to its function and molecular organization. J Cell Sci 124:2702–2710. https://doi.org/10.1242/jcs.085449
Herr MJ, Mabry SE, Jennings LK (2014) Tetraspanin CD9 regulates cell contraction and actin arrangement via RhoA in human vascular smooth muscle cells. PLoS ONE 9:e106999. https://doi.org/10.1371/journal.pone.0106999
Liu WM et al (2012) Tetraspanin CD82 inhibits protrusion and retraction in cell movement by attenuating the plasma membrane-dependent actin organization. PLoS ONE 7:e51797. https://doi.org/10.1371/journal.pone.0051797
Shen Q, Rigor RR, Pivetti CD, Wu MH, Yuan SY (2010) Myosin light chain kinase in microvascular endothelial barrier function. Cardiovasc Res 87:272–280. https://doi.org/10.1093/cvr/cvq144
Huveneers S, Danen EH (2009) Adhesion signaling—crosstalk between integrins, Src and Rho. J Cell Sci 122:1059–1069. https://doi.org/10.1242/jcs.039446
Charrin S et al (2003) A physical and functional link between cholesterol and tetraspanins. Eur J Immunol 33:2479–2489. https://doi.org/10.1002/eji.200323884
Wei Q et al (2014) CD82 restrains pathological angiogenesis by altering lipid raft clustering and CD44 trafficking in endothelial cells. Circulation 130:1493-U1162. https://doi.org/10.1161/Circulationaha.114.011096
Zimmerman B et al (2016) Crystal structure of a full-length human tetraspanin reveals a cholesterol-binding pocket. Cell 167:1041. https://doi.org/10.1016/j.cell.2016.09.056
Acknowledgements
This work was supported by National Institutes of Health Research Grants CA096991, HL132553, and HL137819, American Heart Association Grant-in-Aid 13GRNT17040028, Oklahoma Center for Advanced Science and Technology Grant, and Chapman Foundation (to X. A. Z.). We thank Ms. Kathy Kyler for English editing.
Author information
Authors and Affiliations
Contributions
Conceived and designed the experiments: XAZ. Performed the experiments: CH, CF, XW, JDW, FZ, YHZ, SAC, and XAZ. Analyzed the data: CH, JDW, and XAZ. Contributed reagents/materials/analysis tools: TC. Wrote the paper: XAZ.
Corresponding author
Ethics declarations
Conflict of interest
The authors declare no competing financial interests.
Electronic supplementary material
Below is the link to the electronic supplementary material.
Video
: Nanotubule was formed between two MDCK cells that were expressing GFP-CD151 proteins. Live cell imaging was captured with fluorescent light microscopy. (AVI 7444 kb)
Figure S1. How TEMs regulate DJ morphogenesis: contributions of growth factor/receptor tyrosine kinase and MAP kinase signaling
. LnCap cells cultured on glass coverslips were treated with following activator or inhibitor in serum-free media at 37oC for 60 min, unless otherwise indicated, before they were fixed, incubated with CD44 mAb, DAPI and phalloidin, and then examined and imaged with confocal microscopy. A. Role of HGF and c-Met signaling in DJs. The cells were treated with either HGF (100 ng/ml) after 6-hour serum starvation or MK-2461 (200 nM) without serum starvation. B. Role of MEK signaling in DJs. The cells were treated with Trametinib (200 nM) for 3 h and PD98059 (25 µM). Quantification of microextrusion density in DJs (mean ± S.E., n = 3 individual experiments). ***: P < 0.001. Scale bars: 10 μm. (TIFF 9584 kb)
Figure S2. Spatial arrangement of DJs.
LnCap cells cultured on glass coverslips were fixed and incubated with CD44 mAb and Alexa594-conjugated secondary Ab. Confocal images were acquired as z-stacks comprising sequential optical x–y sections of 46.18 µm x 46.18 µm taken at 1.0 μm z-intervals. Images with maximum cell spreading were selected to represent basal membrane at 0 µm z position. Scale bar: 10 μm. (TIFF 3414 kb)
Rights and permissions
About this article
Cite this article
Huang, C., Fu, C., Wren, J.D. et al. Tetraspanin-enriched microdomains regulate digitation junctions. Cell. Mol. Life Sci. 75, 3423–3439 (2018). https://doi.org/10.1007/s00018-018-2803-2
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00018-018-2803-2


