Cited by 128Melanoma and MAPK PathwaysCutaneous Melanoma Detection and ManagementProtein Kinase Regulation and GTPase Signaling

Purification of melanoma growth stimulatory activity

Richmond, Ann, Thomas, H. Greg·1986·Journal of Cellular Physiology

Abstract

The Hs0294 human malignant melanoma cell line produces a monolayer mitogen that stimulates the serum free growth of low‐density cultures of Hs0294 cells. This report describes the purification of that mitogen, termed MGSA for melanoma growth stimulatory activity, from serum‐free conditioned medium from the Hs0294 cultures. MGSA has been purified from acetic acid extracts of lyophilized conditioned medium by gel filtration, reverse‐phase high‐pressure liquid chromatography (RP‐HPLC), and preparative electrophoresis, resulting in a >400,000‐fold purification. MGSA bioactivity resides in acid‐ and heat‐stable polypeptides of high and low molecular weight (24–28 kd and < 14–16 kd). However, the majority of the activity is reproducibly associated with the ˜16‐kd moiety eluting from RP‐HPLC at ∼35% acetonitrile. Reduction with dithiothreitol or B‐mercaptoethanol results in a loss of biological activity but does not convert the 24–28‐kd moieties to the<14–16‐kd forms of MGSA. 125 l‐MGSA that has been purified by preparative electrophoresis (16 kd) specifically binds to Hs0294 melanoma cells and retains 100% of the growth‐stimulatory activity. The 16‐kd MGSA stimulates the proliferation of Hs0294 cells at concentrations of 0.3–30 pM. The electrophoretic mobility of MGSA is also unaltered by the preparative electrophoresis procedure, further demonstrating that this procedure does not alter the biochemical integrity of the growth factor. Purified MGSA does not enable anchorage‐independent growth of normal rat kidney (NRK) cells and is therefore different from the previously described transforming growth factors. The amino acid composition of MGSA differs from that of other previously described growth factors. These data demonstrate that MGSA represents a separate class of growth factors with biological and biochemical properties different from other growth factors.

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Crossref · 10.1002/jcp.1041290316

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  • In melanoma, GROα/CXCL1, GROβ/CXCL2, GROγ/CXCL3 and IL-8/CXCL8 exert autocrine control over neoplastic cell proliferation.

    “Melanoma is perhaps the best exemplar in which chemokines (for example, GROα/CXCL1, GROβ/CXCL2, GROγ/CXCL3 and IL-8/CXCL8) have been shown to exert autocrine control over neoplastic cell proliferation40.”

    From Inflammation and cancer (2002) · cites this paper as [40]

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Authors
Richmond, A., & Thomas, H. G.
Affiliations
Emory University (US)
Corresponding author
Richmond, Ann
Venue
Journal of Cellular Physiology
Publisher
Wiley
Published
1986-12
Volume
129
Issue
3
Pages
375-384
ISSN
  • 0021-9541 (ISSN-L)
  • 1097-4652
OpenAlex
W2093119949
Cited by
128
References
56
Citations by year
2023: 1 · 2022: 6 · 2021: 5 · 2020: 1 · 2017: 2 · 2016: 2 · 2015: 1 · 2014: 2 · 2013: 1 · 2012: 4
FWCI
2.45
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Cellular Physiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r23ca034590-03)
  • National Cancer Institute (1 R23 CA 34590)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Melanoma and MAPK Pathways
  • Health Sciences › Medicine › Oncology › Cutaneous Melanoma Detection and Management
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
mitogens, serum-free conditioned medium, growth factor purification, cell proliferation, anchorage-independent growth, amino acid composition, peptide growth factors
MeSH terms
Amino Acids, Biological Assay, Cell Line, Chromatography, Gel, Chromatography, High Pressure Liquid, DNA, Electrophoresis, Polyacrylamide Gel, Growth Substances, Humans, Melanoma, Neoplasm Proteins, Peptides, Transforming Growth Factors

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