Comparison of bleaching protocols utilizing hematoxylin and eosin stain and immunohistochemical proliferation marker MCM3 in pigmented melanomas

Tierney Jordan, Destinee Williams, Sheila Criswell, Yongfu Wang

Research output: Contribution to journalArticle

Abstract

Melanomas represent the malignant transformation of melanocytes, cells found primarily in the skin to protect epithelium and underlying connective tissues from harmful effects of ultraviolet light. Melanomas vary greatly in morphology and may continue to produce melanin markedly, mildly, or not at all. Performing and evaluating hematoxylin and eosin stains as well as immunohistochemical stains on pigmented melanomas has been a long-standing challenge due to the obscuring pigment. Protocols for removing melanin to reveal cellular morphology have been used successfully for years, but coupling these protocols with stains for immunohistochemistry represents an added challenge. In this study, the investigators evaluated results of various melanin bleaching protocols on tissue morphology, completeness of melanin removal, and immunohistochemistry staining quality. It was found that 1% formamide in 3% H2O2 under bright light without heating outperformed other tested protocols.

Original languageEnglish (US)
JournalJournal of Histotechnology
DOIs
StateAccepted/In press - Jan 1 2019

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Melanins
Hematoxylin
Eosine Yellowish-(YS)
Hydrogen Peroxide
Melanoma
Coloring Agents
Immunohistochemistry
Melanocytes
Ultraviolet Rays
Connective Tissue
Heating
Epithelium
Research Personnel
Staining and Labeling
Light
Skin

All Science Journal Classification (ASJC) codes

  • Anatomy
  • Histology
  • Medical Laboratory Technology

Cite this

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abstract = "Melanomas represent the malignant transformation of melanocytes, cells found primarily in the skin to protect epithelium and underlying connective tissues from harmful effects of ultraviolet light. Melanomas vary greatly in morphology and may continue to produce melanin markedly, mildly, or not at all. Performing and evaluating hematoxylin and eosin stains as well as immunohistochemical stains on pigmented melanomas has been a long-standing challenge due to the obscuring pigment. Protocols for removing melanin to reveal cellular morphology have been used successfully for years, but coupling these protocols with stains for immunohistochemistry represents an added challenge. In this study, the investigators evaluated results of various melanin bleaching protocols on tissue morphology, completeness of melanin removal, and immunohistochemistry staining quality. It was found that 1{\%} formamide in 3{\%} H2O2 under bright light without heating outperformed other tested protocols.",
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AU - Wang, Yongfu

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