Abstract:
:A sensitive serum-free culture system was used to demonstrate that cells derived from normal human skin release soluble mediators which can modulate keratinocyte, melanocyte, and fibroblast growth in vitro. In M199 supplemented with epidermal growth factor, hydrocortisone, insulin, transferrin, triidothyronine, bovine serum albumin, and an extract of bovine hypothalamus, keratinocytes underwent approximately three to five cumulative population doublings (CPD) over a 7-day period. Addition of 20% keratinocyte-conditioned medium more than doubled keratinocyte growth and increased fibroblast growth 25-40% above controls. Dermal fibroblasts maintained in the same serum-free hormone-supplemented medium (SFHSM) alone underwent approximately 4.5-5.5 CPD over a 7-day period; 20% fibroblast-conditioned medium increased fibroblast growth 50-80% and increased keratinocyte growth 30-50%. Melanocytes maintained in the same SFHSM underwent approximately 1 CPD over a 14-day period and 2 CPD if the medium was supplemented with 2% fetal bovine serum (FBS). Addition of 20% melanocyte-conditioned medium more than doubled melanocyte growth in either SFHSM or in medium containing 2% FBS, but decreased both keratinocyte and fibroblast growth up to 30-60%. None of the conditioned media altered cellular morphology. These data provide the first demonstration of mutual growth modulation by cell types normally contiguous in vivo and expand existing evidence for autocrine and paracrine growth regulation by normal human cells.
journal_name
J Cell Physioljournal_title
Journal of cellular physiologyauthors
Gilchrest BA,Karassik RL,Wilkins LM,Vrabel MA,Maciag Tdoi
10.1002/jcp.1041170215subject
Has Abstractpub_date
1983-11-01 00:00:00pages
235-40issue
2eissn
0021-9541issn
1097-4652journal_volume
117pub_type
杂志文章abstract::Glioblastoma multiforme is the most common and aggressive primary brain cancer with only ∼3% of patients surviving more than 3 years from diagnosis. Several mechanisms are involved in drug and radiation resistance to anticancer treatments and among them one of the most important factors is the tumor microenvironment s...
journal_title:Journal of cellular physiology
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更新日期:2012-10-01 00:00:00
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更新日期:2005-11-01 00:00:00
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更新日期:2018-09-01 00:00:00
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更新日期:1995-12-01 00:00:00
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更新日期:2009-02-01 00:00:00
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更新日期:2020-09-01 00:00:00
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更新日期:2019-04-01 00:00:00
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更新日期:2011-10-01 00:00:00
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journal_title:Journal of cellular physiology
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更新日期:2012-04-01 00:00:00
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更新日期:2020-04-01 00:00:00
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更新日期:2003-03-01 00:00:00
abstract::Epithelial-mesenchymal transition (EMT), via activation of Wnt signaling, is prevailing in embryogenesis, but postnatally it only occurs in pathological processes, such as in tissue fibrosis and tumor metastasis. Our prior studies led us to speculate that EMT might be involved in the loss of limbal epithelial stem cel...
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更新日期:2013-01-01 00:00:00
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journal_title:Journal of cellular physiology
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更新日期:2008-03-01 00:00:00