Abstract
Merkel cells, the neurosecretory cells of skin, are essential for light-touch responses and may probably fulfill additional functions. Whether these cells derive from an epidermal or a neural lineage has been a matter of dispute for a long time. In mice, recent studies have clearly demonstrated an epidermal origin of Merkel cells. Given the differences in Merkel cell distribution between human and murine skin, it is, however, unclear whether the same holds true for human Merkel cells. We therefore attempted to gain insight into the human Merkel cell lineage by co-immunodetection of the Merkel cell marker protein cytokeratin 20 (CK20) with various proteins known to be expressed either in epidermal or in neural stem cells of the skin. Neither Sox10 nor Pax3, both established markers of the neural crest lineage, exhibited any cell co-labeling with CK20. By contrast, β1 integrin, known to be enriched in epidermal stem cells, was found in nearly 70 % of interfollicular epidermal and 25 % of follicular Merkel cells. Moreover, LRIG1, also enriched in epidermal stem cells, displayed significant co-immunolabeling with CK20 as well (approximately 20 % in the interfollicular epidermis and 7 % in the hair follicle, respectively). Further epidermal markers were detected in sporadic Merkel cells. Cells co-expressing CK20 with epidermal markers may represent a transitory state between stem cells and differentiated cells. β1 integrin is probably also synthesized by a large subset of mature Merkel cells. Summarizing, our data suggest that human Merkel cells may originate from epidermal rather than neural progenitors.
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Ambler CA, Määttä A (2009) Epidermal stem cells: location, potential and contribution to cancer. J Pathol 217:206–216
Bardot ES, Valdes VJ, Zhang J, Perdigoto CN, Nicolis S, Hearn SA, Silva JM, Ezhkova E (2013) Polycomb subunits Ezh1 and Ezh2 regulate the Merkel cell differentiation program in skin stem cells. EMBO J 32:1990–2000
Boulais N, Misery L (2007) Merkel cells. J Am Acad Dermatol 57:147–165
Calder KB, Smoller BR (2010) New insights into merkel cell carcinoma. Adv Anat Pathol 17:155–161
Clewes O, Narytnyk A, Gillinder KR, Loughney AD, Murdoch AP, Sieber-Blum M (2011) Human epidermal neural crest stem cells (hEPI-NCSC)-characterization and directed differentiation into osteocytes and melanocytes. Stem Cell Rev 7:799–814
Coulombe PA, Kopan R, Fuchs E (1989) Expression of keratin K14 in the epidermis and hair follicle: insights into complex programs of differentiation. J Cell Biol 109:2295–2312
De Wolff-Peeters C, Marien K, Mebis J, Desmet V (1980) A cutaneous APUDoma or Merkel cell tumor? A morphologically recognizable tumor with a biological and histological malignant aspect in contrast with its clinical behavior. Cancer 46:1810–1816
Dittel BN, McCarthy JB, Wayner EA, LeBien TW (1993) Regulation of human B-cell precursor adhesion to bone marrow stromal cells by cytokines that exert opposing effects on the expression of vascular cell adhesion molecule-1 (VCAM-1). Blood 81:2272–2282
Doucet YS, Woo SH, Ruiz ME, Owens DM (2013) The touch dome defines an epidermal niche specialized for mechanosensory signaling. Cell Rep 3:1759–1765
Eispert AC, Fuchs F, Brandner JM, Houdek P, Wladykowski E, Moll I (2009) Evidence for distinct populations of human Merkel cells. Histochem Cell Biol 132:83–93
Ghali L, Wong ST, Tidman N, Quinn A, Philpott MP, Leigh IM (2004) Epidermal and hair follicle progenitor cells express melanoma-associated chondroitin sulfate proteoglycan core protein. J Invest Dermatol 122:433–442
Grichnik JM, Ali WN, Burch JA, Byers JD, Garcia CA, Clark RE, Shea CR (1996) KIT expression reveals a population of precursor melanocytes in human skin. J Invest Dermatol 106:967–971
Heider MR, Munson M (2012) Exorcising the exocyst complex. Traffic 13:898–907
Hynes RO (2009) The extracellular matrix: not just pretty fibrils. Science 326:1216–1219
Jensen KB, Watt FM (2006) Single-cell expression profiling of human epidermal stem and transit-amplifying cells: Lrig1 is a regulator of stem cell quiescence. Proc Natl Acad Sci USA 103:11958–11963
Jensen KB, Collins CA, Nascimento E, Tan DW, Frye M, Itami S, Watt FM (2009) Lrig1 expression defines a distinct multipotent stem cell population in mammalian epidermis. Cell Stem Cell 4:427–439
Jones PH, Watt FM (1993) Separation of human epidermal stem cells from transit amplifying cells on the basis of differences in integrin function and expression. Cell 73:713–724
Karlsson T, Mark EB, Henriksson R, Hedman H (2008) Redistribution of LRIG proteins in psoriasis. J Invest Dermatol 128:1192–1195
Kloepper JE, Tiede S, Brinckmann J, Reinhardt DP, Meyer W, Faessler R, Paus R (2008) Immunophenotyping of the human bulge region: the quest to define useful in situ markers for human epithelial hair follicle stem cells and their niche. Exp Dermatol 17:592–609
Laga AC, Lai CY, Zhan Q, Huang SJ, Velazquez EF, Yang Q, Hsu MY, Murphy GF (2010) Expression of the embryonic stem cell transcription factor SOX2 in human skin: relevance to melanocyte and merkel cell biology. Am J Pathol 176:903–913
Legg J, Jensen UB, Broad S, Leigh I, Watt FM (2003) Role of melanoma chondroitin sulphate proteoglycan in patterning stem cells in human interfollicular epidermis. Development 130:6049–6063
Lledo PM, Alonso M, Grubb MS (2006) Adult neurogenesis and functional plasticity in neuronal circuits. Nat Rev Neurosci 7:179–193
Maricich SM, Wellnitz SA, Nelson AM, Lesniak DR, Gerling GJ, Lumpkin EA, Zoghbi HY (2009) Merkel cells are essential for light-touch responses. Science 324:1580–1582
Maricich SM, Morrison KM, Mathes EL, Brewer BM (2012) Rodents rely on merkel cells for texture discrimination tasks. J Neurosci 32:3296–3300
Medic S, Ziman M (2010) PAX3 expression in normal skin melanocytes and melanocytic lesions (naevi and melanomas). PLoS ONE 5:e9977
Merkel F (1875) Tastzellen und Tastkörperchen bei den Hausthieren und beim Menschen. Arch Mikrosk Anat 11:636–652
Metallo CM, Azarin SM, Moses LE, Ji L, de Pablo JJ, Palecek SP (2010) Human embryonic stem cell-derived keratinocytes exhibit an epidermal transcription program and undergo epithelial morphogenesis in engineered tissue constructs. Tissue Eng Part A 16:213–223
Milet C, Maczkowiak F, Roche DD, Monsoro-Burq AH (2013) Pax3 and Zic1 drive induction and differentiation of multipotent, migratory, and functional neural crest in Xenopus embryos. Proc Natl Acad Sci USA 110:5528–5533
Moll R, Franke WW, Schiller DL, Geiger B, Krepler R (1982) The catalog of human cytokeratins: patterns of expression in normal epithelia, tumors and cultured cells. Cell 31:11–24
Moll I, Lane AT, Franke WW, Moll R (1990) Intraepidermal formation of Merkel cells in xenografts of human fetal skin. J Invest Dermatol 94:359–364
Moll I, Kuhn C, Moll R (1995) Cytokeratin 20 is a general marker of cutaneous Merkel cells while certain neuronal proteins are absent. J Invest Dermatol 104:910–915
Moll I, Paus R, Moll R (1996) Merkel cells in mouse skin: intermediate filament pattern, localization, and hair cycle-dependent density. J Invest Dermatol 106:281–286
Moll I, Roessler M, Brandner JM, Eispert AC, Houdek P, Moll R (2005) Human Merkel cells–aspects of cell biology, distribution and functions. Eur J Cell Biol 84:259–271
Morrison KM, Miesegaes GR, Lumpkin EA, Maricich SM (2009) Mammalian Merkel cells are descended from the epidermal lineage. Dev Biol 336:76–83
Narisawa Y, Hashimoto K, Kohda H (1994) Merkel cells of the terminal hair follicle of the adult human scalp. J Invest Dermatol 102:506–510
Nonaka D, Chiriboga L, Rubin BP (2008) Sox10: a pan-schwannian and melanocytic marker. Am J Surg Pathol 32:1291–1298
Okubo T, Clark C, Hogan BL (2009) Cell lineage mapping of taste bud cells and keratinocytes in the mouse tongue and soft palate. Stem Cells 27:442–450
Pasche F, Merot Y, Carraux P, Saurat JH (1990) Relationship between Merkel cells and nerve endings during embryogenesis in the mouse epidermis. J Invest Dermatol 95:247–251
Pellegrini G, Dellambra E, Golisano O, Martinelli E, Fantozzi I, Bondanza S, Ponzin D, McKeon F, De Luca M (2001) p63 identifies keratinocyte stem cells. Proc Natl Acad Sci USA 98:3156–3161
Peters EM, Stieglitz MG, Liezman C, Overall RW, Nakamura M, Hagen E, Klapp BF, Arck P, Paus R (2006) p75 Neurotrophin receptor-mediated signaling promotes human hair follicle regression (Catagen). Am J Pathol 168:221–234
Pincelli C, Marconi A (2010) Keratinocyte stem cells: friends and foes. J Cell Physiol 225:310–315
Pincelli C, Sevignani C, Manfredini R, Grande A, Fantini F, Bracci-Laudiero L, Aloe L, Ferrari S, Cossarizza A, Giannetti A (1994) Expression and function of nerve growth factor and nerve growth factor receptor on cultured keratinocytes. J Invest Dermatol 103:13–18
Ribeiro A, Balasubramanian S, Hughes D, Vargo S, Powell EM, Leach JB (2013) beta1-Integrin cytoskeletal signaling regulates sensory neuron response to matrix dimensionality. Neuroscience 248C:67–78
Shakhova O, Sommer L (2010) Neural crest-derived stem cells. StemBook [Internet]. Harvard Stem Cell Institute, Cambridge, MA. http://www.ncbi.nlm.nih.gov/books/NBK44752/pdf/Neural_crest-derived_stem_cells.pdf
Sibley RK, Rosai J, Foucar E, Dehner LP, Bosl G (1980) Neuroendocrine (Merkel cell) carcinoma of the skin. A histologic and ultrastructural study of two cases. Am J Surg Pathol 4:211–221
Siebzehnrubl FA, Reynolds BA, Vescovi A, Steindler DA, Deleyrolle LP (2011) The origins of glioma: E Pluribus Unum? Glia 59:1135–1147
Silver DJ, Steindler DA (2009) Common astrocytic programs during brain development, injury and cancer. Trends Neurosci 32:303–311
Szeder V, Grim M, Halata Z, Sieber-Blum M (2003) Neural crest origin of mammalian Merkel cells. Dev Biol 253:258–263
Tachibana T, Nawa T (1980) Merkel cell differentiation in the labial mucous epithelium of the rabbit. J Anat 131:145–155
Tanemura A, Nagasawa T, Inui S, Itami S (2005) LRIG-1 provides a novel prognostic predictor in squamous cell carcinoma of the skin: immunohistochemical analysis for 38 cases. Dermatol Surg 31:423–430
Tilling T, Moll I (2012) Which are the cells of origin in merkel cell carcinoma? J Skin Cancer 2012:680410
Troy TC, Arabzadeh A, Turksen K (2011) Re-assessing K15 as an epidermal stem cell marker. Stem Cell Rev 7:927–934
Van Keymeulen A, Mascre G, Yousseff KK, Harel I, Michaux C, De Geest N, Szpalski C, Achouri Y, Bloch W, Hassan BA, Blanpain C (2009) Epidermal progenitors give rise to Merkel cells during embryonic development and adult homeostasis. J Cell Biol 187:91–100
Vockel M, Breitenbach U, Kreienkamp HJ, Brandner JM (2010) Somatostatin regulates tight junction function and composition in human keratinocytes. Exp Dermatol 19:888–894
von Bohlen und Halbach O (2007) Immunohistological markers for staging neurogenesis in adult hippocampus. Cell Tissue Res 329:409–420
Waseem A, Dogan B, Tidman N, Alam Y, Purkis P, Jackson S, Lalli A, Machesney M, Leigh IM (1999) Keratin 15 expression in stratified epithelia: downregulation in activated keratinocytes. J Invest Dermatol 112:362–369
Wickström SA, Fässler R (2011) Regulation of membrane traffic by integrin signaling. Trends Cell Biol 21:266–273
Wong CE, Paratore C, Dours-Zimmermann MT, Rochat A, Pietri T, Suter U, Zimmermann DR, Dufour S, Thiery JP, Meijer D, Beermann F, Barrandon Y, Sommer L (2006) Neural crest-derived cells with stem cell features can be traced back to multiple lineages in the adult skin. J Cell Biol 175:1005–1015
Woo SH, Stumpfova M, Jensen UB, Lumpkin EA, Owens DM (2010) Identification of epidermal progenitors for the Merkel cell lineage. Development 137:3965–3971
Yang A, Kaghad M, Wang Y, Gillett E, Fleming MD, Dotsch V, Andrews NC, Caput D, McKeon F (1998) p63, a p53 homolog at 3q27-29, encodes multiple products with transactivating, death-inducing, and dominant-negative activities. Mol Cell 2:305–316
Zabierowski SE, Fukunaga-Kalabis M, Li L, Herlyn M (2011) Dermis-derived stem cells: a source of epidermal melanocytes and melanoma? Pigment Cell Melanoma Res 24:422–429
Acknowledgments
We thank Prof. Satoshi Itami (Osaka) for kindly providing anti-LRIG1 antibodies. The Pax3 monoclonal antibody, developed by C.P. Ordahl, as well as the P5D2 monoclonal antibody against β1 integrin, developed by E.A. Wayner, were obtained from the Developmental Studies Hybridoma Bank developed under the auspices of the NICHD and maintained by the University of Iowa, Department of Biological Sciences, Iowa City, IA 52242. We would also like to thank Dr. Sandra Medic (Perth, Australia) for helpful advice on Pax3 immunostainings.
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Tilling, T., Wladykowski, E., Failla, A.V. et al. Immunohistochemical analyses point to epidermal origin of human Merkel cells. Histochem Cell Biol 141, 407–421 (2014). https://doi.org/10.1007/s00418-013-1168-8
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DOI: https://doi.org/10.1007/s00418-013-1168-8