What question did this study set out to answer?

To develop solid-phase peptide-conjugated bead systems for the microscopic visualization and functional characterization of melanotropin receptors on melanoma cells.

November 26, 1996Proceedings of the National Academy of SciencesOpen Access

Melanotropic peptide-conjugated beads for microscopic visualization and characterization of melanoma melanotropin receptors

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Authors

SSShubh D. SharmaHeart Rhythm Society JJJinwen JiangNingbo University MHMac E. HadleyVrije Universiteit Brussel

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Implication

Experimental study demonstrates specific melanotropin receptor binding in melanoma and epidermal skin cells, indicating universal receptor presence across pigment-producing cells.

Key Points

To develop solid-phase peptide-conjugated bead systems for the microscopic visualization and functional characterization of melanotropin receptors on melanoma cells.
Conjugated the potent alpha-MSH analog [Nle-4,D-Phe-7]-alpha-MSH to latex microspheres or polyamide macrospheres via thioether or cleavable disulfide bonds.
Assessed surface binding across mouse and human melanoma cell lines, normal melanocytes, keratinocytes, and non-melanocyte control lines using light and scanning electron microscopy.
Evaluated binding specificity via ligand competition with unconjugated MSH analog and dithiothreitol (DTT)-mediated cleavage of disulfide-linked ligands.
Melanotropin-conjugated beads bound specifically to all examined mouse and human melanoma cell lines across all phases of the cell cycle, triggering visible receptor capping.
Binding was completely abolished by prior incubation with unconjugated MSH analog or by DTT-induced release of disulfide-tethered ligands, with no binding detected on non-melanocyte control cells.
Normal human epidermal melanocytes and keratinocytes demonstrated equivalent melanotropin receptor expression and bead-binding characteristics.

Cite This Study

Sharma et al. (1996) studied this question.

synapsesocial.com/papers/6aa9edf052cffb64cd35daf1 https://doi.org/10.1073/pnas.93.24.13715

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Implication

Experimental study demonstrates specific melanotropin receptor binding in melanoma and epidermal skin cells, indicating universal receptor presence across pigment-producing cells.

Melanotropic peptide-conjugated beads for microscopic visualization and characterization of melanoma melanotropin receptors

Discussion

Member takes

Implication

Key Points

Cite This Study

Melanotropic peptide-conjugated beads for microscopic visualization and characterization of melanoma melanotropin receptors

Discussion

Member takes

Implication

Key Points

Cite This Study

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