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SignalSilence® S100A4 siRNA I

SignalSilence® S100A4 siRNA I #12966

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SignalSilence® S100A4 siRNA I: Image 1
Western blot analysis of extracts from A172 cells, transfected with 100 nM SignalSilence® Control siRNA (Unconjugated) #6568 (-), SignalSilence® S100A4 siRNA I (+), or SignalSilence® S100A4 siRNA II #13021 (+), using S100A4 (D9F9D) Rabbit mAb #13018 (upper) or β-Actin (D6A8) Rabbit mAb #8457 (lower). The S100A4 (D9F9D) Rabbit mAb confirms silencing of S100A4 expression, while the β-Actin (D6A8) Rabbit mAb is used as a loading control.

Supporting Data


Application Key:

  • WB-Western Blot
  • IP-Immunoprecipitation
  • IHC-Immunohistochemistry
  • ChIP-Chromatin Immunoprecipitation
  • C&T-CUT&Tag
  • DB-Dot Blot
  • IF-Immunofluorescence
  • F-Flow Cytometry

Species Cross-Reactivity Key:

  • H-Human
  • M-Mouse
  • R-Rat
  • Hm-Hamster
  • Mk-Monkey
  • Vir-Virus
  • Mi-Mink
  • C-Chicken
  • Dm-D. melanogaster
  • X-Xenopus
  • Z-Zebrafish
  • B-Bovine
  • Dg-Dog
  • Pg-Pig
  • Sc-S. cerevisiae
  • Ce-C. elegans
  • Hr-Horse
  • GP-Guinea Pig
  • Rab-Rabbit
  • All-All Species Expected

Product Usage Information

CST recommends transfection with 100 nM SignalSilence® S100A4 siRNA I 48 to 72 hours prior to cell lysis. For transfection procedure, follow protocol provided by the transfection reagent manufacturer. Please feel free to contact CST with any questions on use.

Each vial contains the equivalent of 100 transfections, which corresponds to a final siRNA concentration of 100 nM per transfection in a 24-well plate with a total volume of 300 μl per well.


SignalSilence® siRNA is supplied in RNAse-free water. Aliquot and store at -20ºC.

Product Description

SignalSilence® S100A4 siRNA I from Cell Signaling Technology (CST) allows the researcher to specifically inhibit S100A4 expression using RNA interference, a method whereby gene expression can be selectively silenced through the delivery of double stranded RNA molecules into the cell. All SignalSilence® siRNA products from CST are rigorously tested in-house and have been shown to reduce target protein expression by western analysis.

Quality Control

Oligonucleotide synthesis is monitored base by base through trityl analysis to ensure appropriate coupling efficiency. The oligo is subsequently purified by affinity-solid phase extraction. The annealed RNA duplex is further analyzed by mass spectrometry to verify the exact composition of the duplex. Each lot is compared to the previous lot by mass spectrometry to ensure maximum lot-to-lot consistency.


Despite their relatively small size (8-12 kDa) and uncomplicated architecture, S100 proteins regulate a variety of cellular processes, such as cell growth and motility, cell cycle progression, transcription, and differentiation. To date, 25 members have been identified, including S100A1-S100A18, trichohyalin, filaggrin, repetin, S100P, and S100Z, making it the largest group in the EF-hand, calcium-binding protein family. Interestingly, 14 S100 genes are clustered on human chromosome 1q21, a region of genomic instability. Research studies have demonstrated that significant correlation exists between aberrant S100 protein expression and cancer progression. S100 proteins primarily mediate immune responses in various tissue types but are also involved in neuronal development (1-4).

Each S100 monomer bears two EF-hand motifs and can bind up to two molecules of calcium (or other divalent cation in some instances). Structural evidence shows that S100 proteins form antiparallel homo- or heterodimers that coordinate binding partner proximity in a calcium-dependent (and sometimes calcium-independent) manner. Although structurally and functionally similar, individual members show restricted tissue distribution, are localized in specific cellular compartments, and display unique protein binding partners, which suggests that each plays a specific role in various signaling pathways. In addition to an intracellular role, some S100 proteins have been shown to act as receptors for extracellular ligands or are secreted and exhibit cytokine-like activities (1-4).

Research studies have shown that S100A4 is overexpressed in highly metastatic cancers, which makes it useful as a marker of tumor progression (5,6) and may serve as a prognostic factor in several cancer types (7-10). S100A4 exerts its function via direct interaction with a number of proteins including P53, P63, nonmuscle myosin IIA, α6β4 integrin, and liprin b1 (11-15). S100A4 is present in the nucleus, cytoplasm and extracellular space. Intracellular and extracellular S100A4 both promote cell migration via interaction with different proteins. Researchers have recently discovered that S100A4 also functions as a neuroprotectant in the peripheral nervous system (16,17).
  1. Heizmann, C.W. et al. (2002) Front Biosci 7, d1356-68.
  2. Donato, R. (2003) Microsc Res Tech 60, 540-51.
  3. Marenholz, I. et al. (2004) Biochem Biophys Res Commun 322, 1111-22.
  4. Santamaria-Kisiel, L. et al. (2006) Biochem J 396, 201-14.
  5. Ismail, N.I. et al. (2008) Cancer Cell Int 8, 12.
  6. Ismail, T.M. et al. (2010) J Biol Chem 285, 914-22.
  7. Rudland, P.S. et al. (2000) Cancer Res 60, 1595-603.
  8. Huang, L.Y. et al. (2011) World J Gastroenterol 17, 69-78.
  9. Wang, L.J. et al. (2012) Appl Immunohistochem Mol Morphol 20, 71-6.
  10. Kang, Y.G. et al. (2012) J Surg Oncol 105, 119-24.
  11. Kriajevska, M.V. et al. (1994) J Biol Chem 269, 19679-82.
  12. Takenaga, K. et al. (1994) J Cell Biol 124, 757-68.
  13. Kriajevska, M. et al. (2002) J Biol Chem 277, 5229-35.
  14. Kim, T.H. et al. (2009) Mol Cancer Res 7, 1605-12.
  15. van Dieck, J. et al. (2010) Oncogene 29, 2024-35.
  16. Dmytriyeva, O. et al. (2012) Nat Commun 3, 1197.
  17. Moldovan, M. et al. (2013) Mol Med 19, 43-53.

Pathways & Proteins

Explore pathways + proteins related to this product.

Limited Uses

Except as otherwise expressly agreed in a writing signed by a legally authorized representative of CST, the following terms apply to Products provided by CST, its affiliates or its distributors. Any Customer's terms and conditions that are in addition to, or different from, those contained herein, unless separately accepted in writing by a legally authorized representative of CST, are rejected and are of no force or effect.

Products are labeled with For Research Use Only or a similar labeling statement and have not been approved, cleared, or licensed by the FDA or other regulatory foreign or domestic entity, for any purpose. Customer shall not use any Product for any diagnostic or therapeutic purpose, or otherwise in any manner that conflicts with its labeling statement. Products sold or licensed by CST are provided for Customer as the end-user and solely for research and development uses. Any use of Product for diagnostic, prophylactic or therapeutic purposes, or any purchase of Product for resale (alone or as a component) or other commercial purpose, requires a separate license from CST. Customer shall (a) not sell, license, loan, donate or otherwise transfer or make available any Product to any third party, whether alone or in combination with other materials, or use the Products to manufacture any commercial products, (b) not copy, modify, reverse engineer, decompile, disassemble or otherwise attempt to discover the underlying structure or technology of the Products, or use the Products for the purpose of developing any products or services that would compete with CST products or services, (c) not alter or remove from the Products any trademarks, trade names, logos, patent or copyright notices or markings, (d) use the Products solely in accordance with CST Product Terms of Sale and any applicable documentation, and (e) comply with any license, terms of service or similar agreement with respect to any third party products or services used by Customer in connection with the Products.

For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
SignalSilence is a registered trademark of Cell Signaling Technology, Inc.
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To Purchase # 12966
Cat. # Size Qty. Price
300 µl  (3 nmol)
$ 347

Important Ordering Details

Custom Ordering Details: Product is assembled upon order. Please allow up to three business days for your product to be processed.