Stains & molecular markers

Topic Completed: 1 June 2005

Minor changes: 3 September 2020

Copyright: 2002-2021,, Inc.

PubMed Search: Maspin [title]

Nat Pernick, M.D.
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Cite this page: Pernick N. Maspin. website. Accessed January 20th, 2021.
Definition / general
  • Tumor suppressor protein with serine protease inhibition (Serpin) activity at 18q21.3
  • Directly regulated by p53; inhibits tumor cell motility, invasion, metastasis and angiogenesis
  • Cervical squamous cell carcinoma: loss of expression from CIN 3 (HG SIL) to invasive squamous cell carcinoma (Mod Pathol 2005;18:1102)
  • Oral squamous cell carcinoma: maspin+ tumors have longer overall survival than maspin- tumors (Oncogene 2000;19:2398)
Microscopic (histologic) images

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Positive staining - normal
  • Breast, prostate epithelium
Positive staining - disease
  • Ovarian, pancreatic and gastric carcinomas
Negative staining
  • Breast and prostate carcinomas; normal pancreas
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