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Zooming in across the Skin: A Macro-to-Molecular Panorama

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Cell Biology and Translational Medicine, Volume 8

Abstract

Maintaining integrity of the skin and its appendages still preserves its top-ranking in priorities of survival for the modern human as it probably once did for the ancient individual, −not only- because it is the primary barrier to external assaults, but also because of social and psychological impact of healthy skin during their life-span. Healing wounds in order to shield off the internal organs from infections and damage, restoring its ability to adapt to various environmental stimuli, and slowing-down and reversing aging of the skin in the quest for an everlasting youth can be named as a few of the main drivers behind the multi-million investments dedicated to the advancement of our understanding of skin’s physiology. Over the years, these tremendous efforts culminated in the breakthrough discovery of skin stem cells the regenerative capacity of which accounted for the resilience of the skin through their unique capacity as a special cell type that can both self-renew and differentiate into various lineages. In this review, first we summarize the current knowledge on this amazing organ both at a structural and functional level. Next, we provide a comprehensive -in depth- discussion on epidermal as well as dermal stem cells in terms of the key regulatory pathways as well as the main genetic factors that have been implicated in the orchestration of the skin stem cell biology in regards to the shifts between quiescence and entry into distinct differentiation programs.

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Abbreviations

AEG:

Apoeccrine Sweat Glands

APM:

Arrector Pili Muscle

BCCs:

Basal Cell Carcinomas

BMP:

Bone Morphogenetic Protein

BMPs:

Bone Morphogenetic Proteins

Brdurd:

Bromodeoxyuridine

Bu-SC:

Bulge Lack Bulge Stem Cell

CGRP:

Calcitonin Gene-Related Peptide

CSCs:

Cancer Stem Cells

DETCs:

Dendritic Epidermal Γδ T Cells

DP:

Dermal Papilla

DP:

Dermal Papilla

DS:

Dermal Sheath

DSCs:

Dermal Stem Cells

E6:

Embryonic Week 6

EGFR:

Epidermal Growth Factor Receptor

FGF-7:

Fibroblast Growth Factor 7

GSI:

Gamma Secretase İnhibitor

GVHD:

Graft Versus Host Disease

HF:

Hair Follicle

HFSC:

Hair Follicular Stem Cell

Hh/Ptc:

Hedgehog/Patched

H3K27:

Histone H3 Lys

Hox:

Homeobox

Hescs:

Human Embryonic Stem Cells

EPI-Ncscs:

Human Epidermal Neural Crest Stem Cells

IRS:

Inner Root Sheath

IGF-1:

Insulin-Like Growth Factor 1

IFE:

Interfollicular Epidermis

IFs:

Intermediate Filaments

K14:

Keratin 14

K5:

Keratin 5

LRCs:

Label Retaining Cells

LLP:

Lower Permanent Portion

M-SCs:

Melanocyte Stem Cells

MSCs:

Mesenchymal Stem Cells

NKC:

Natural Killer Cell

NID:

Notch İntracellular Domain

ORS:

Outer Root Sheath

PSU:

Pilosebaceous Unit

PDGF-Alpha:

Platelet-Derived-Growth-Factor Alpha

SOA:

Solid Organ Allograft

SOT:

Solid Organ Transplantation

SCCs:

Squamous Cell Carcinomas

TGF Alpha:

Transforming Growth Factor Alpha

TACS:

Transiently Amplifying Cells

Wg/Wnt/Catenin:

Wingless/Armadillo

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Correspondence to Pakize Neslihan Taşlı .

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Deniz, A.A.H., Abdik, E.A., Abdik, H., Aydın, S., Şahin, F., Taşlı, P.N. (2019). Zooming in across the Skin: A Macro-to-Molecular Panorama. In: Turksen, K. (eds) Cell Biology and Translational Medicine, Volume 8. Advances in Experimental Medicine and Biology(), vol 1247. Springer, Cham. https://doi.org/10.1007/5584_2019_442

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