Simplified purification procedure of laminin-332 and laminin-511 from human cell lines

Isis C. Sroka, Man Ling Chen, Anne E. Cress

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Laminins are glycoproteins expressed in the basement membrane of multiple epithelial tissues. Previously described purification procedures for the human laminin variants laminin-5 (LN-332) and laminin-10 (LN-511) use tissue as starting material and have multiple steps. We demonstrate a two-step laminin immunoaffinity purification method to produce consistent quantities of intact and biologically active LN-332 and LN-511 from human keratinocyte (HaCaT) and human lung carcinoma (A549) cell lines, respectively. The purification of LN-332 and LN-551 was demonstrated by PAGE analysis, silver staining and Western blot analysis. The purification procedure includes instruction on removing a cell adhesion contaminant known as galectin-3 binding protein from purified LN-511. The biological activity of purified laminin was tested in a standard cell adhesion assay and compared to commercially available LN-111. This rapid and reproducible purification method will contribute to understanding the role of LN-332 and LN-511 in cell behavior, signaling, and gene expression.

Original languageEnglish (US)
Pages (from-to)410-413
Number of pages4
JournalBiochemical and Biophysical Research Communications
Issue number3
StatePublished - Oct 24 2008


  • Laminin-322
  • Laminin-511
  • Purification

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology


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