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Related Experiment Video

Updated: May 18, 2026

Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells

Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells

Published on: June 7, 2019

CXCR7 mediates SDF1-induced melanocyte migration.

Eunkyung Lee¹, Jiyeon Han, Kwangmi Kim

¹Bioscience Research Institute, AmorePacific Corporation R&D Center, Yongin-si, South Korea.

Pigment Cell & Melanoma Research

|September 18, 2012

Summary

Stromal-derived factor-1 (SDF1) and its receptor CXCR7 regulate normal human epidermal melanocyte (NHEM) migration. This pathway, involving MAP kinase activation, suggests a unique melanocyte migration mechanism distinct from other cell types.

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Area of Science:

Cell Biology
Dermatology
Developmental Biology

Background:

Melanoblasts originate from neural crest cells and are crucial for skin and hair pigmentation.
While embryonic melanoblast migration is well-studied, the migration of mature melanocytes is less understood.
Understanding melanocyte migration is vital for research into pigmentation disorders and skin regeneration.

Purpose of the Study:

To investigate the role of stromal-derived factor-1 (SDF1/CXCL12) and its receptors in normal human epidermal melanocyte (NHEM) migration.
To elucidate the specific receptor (CXCR4 vs. CXCR7) involved in SDF1-induced melanocyte migration.
To explore the signaling pathways activated by SDF1 in NHEMs.

Main Methods:

Utilized normal human epidermal melanocytes (NHEMs) in migration assays.
Employed neutralizing antibodies to block CXCR4 and CXCR7 receptors.
Analyzed MAP kinase activation, specifically ERK phosphorylation, via Western blotting.
Investigated the role of β-arrestin 2 in the signaling cascade.

Main Results:

SDF1 significantly induced directional migration of NHEMs.
Blocking CXCR4 had no effect on SDF1-induced migration, while blocking CXCR7 inhibited it.
SDF1-induced migration involved MAP kinase activation, specifically ERK phosphorylation.
ERK phosphorylation was dependent on β-arrestin 2, indicating a specific signaling pathway.

Conclusions:

SDF1, through its receptor CXCR7, plays a key role in regulating normal human epidermal melanocyte migration.
Melanocyte migration appears to utilize a unique SDF1/CXCR7 signaling pathway, distinct from mechanisms in other cell types.
This finding opens new avenues for understanding melanocyte behavior and developing targeted therapies.