Cell Signaling Technology

Product Pathways - PI3K / Akt Signaling

PTEN (138G6) Rabbit mAb #9559

Applications Reactivity Sensitivity MW (kDa) Isotype
W IP IHC-P H M R Mk Endogenous 54 Rabbit IgG

Applications Key:  W=Western Blotting  IP=Immunoprecipitation  IHC-P=Immunohistochemistry (Paraffin)
Reactivity Key:  H=Human  M=Mouse  R=Rat  Mk=Monkey
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Protocols

Specificity / Sensitivity

PTEN (138G6) Rabbit mAb detects endogenous levels of total PTEN protein.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to the carboxy-terminal sequence of human PTEN.

Western Blotting

Western Blotting

Western blot analysis of extracts from HeLa cells, transfected with 100 nM SignalSilence® Control siRNA (Fluorescein Conjugate) #6201 (-) or SignalSilence® PTEN siRNA I (+), using PTEN Antibody #9552 and p42 MAPK (Erk2) Antibody #9108. PTEN Antibody confirms silencing of PTEN expression, while the p42 MAPK (Erk2) Antibody is used to control for loading and specificity of PTEN siRNA.

Western Blotting

Western Blotting

Western blot analysis of extracts from HeLa cells, transfected with 100 nM SignalSilence® Control siRNA (Fluorescein Conjugate) #6201 (-) or SignalSilence® PTEN siRNA II (+), using PTEN (138G6) Rabbit mAb and β-Actin (13E5) Rabbit mAb #4970. PTEN (138G6) Rabbit mAb confirms silencing of PTEN expression, while the β-Actin (13E5) Rabbit mAb is used to control for loading and specificity of PTEN siRNA.

Western Blotting

Western Blotting

Western blot analysis of extracts from A431, HeLa, 293, COS, PC12, NIH/3T3 and Mouse Brain cells, using PTEN (138G6) Rabbit mAb.


IHC-P (paraffin)

IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded MDA-MB-468 xenograft, using Phospho-Akt (Ser473) (736E11) Rabbit mAb (IHC Preferred) (#3787) (left) or PTEN (138G6) Rabbit mAb (right). MDA-MB-468 cells lack PTEN. Note the lack of PTEN staining in the Phospho-Akt positive cells.

IHC-P (paraffin)

IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded human lung carcinoma (left) and prostate carcinoma (right), using PTEN (138G6) Rabbit mAb. Note the stromal cell staining in the PTEN negative lung carcinoma, and the cancer cell staining in the PTEN positive prostate carcinoma.

IHC-P (paraffin)

IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded human colon carcinoma, using PTEN (138G6) Rabbit mAb in the presence of control peptide (left) or PTEN Blocking Peptide #1250 (right).


IHC-P (paraffin)

IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded cell pellets demonstrating the specificity of PTEN (138G6) Rabbit mAb: DU145, HT-29 and MCF-7 (PTEN positive) and Jurkat, MDA-MB-468 and LNCaP (PTEN negative).

IHC-P (paraffin)

IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded xenografts using PTEN (138G6) Rabbit mAb. DU145 (left) and A549 (middle) are PTEN positive cell lines, while U-87MG (right) is PTEN negative.

IHC-P (paraffin)

IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded MDA-MB-468 xenograft using Phospho-Akt (Ser473) (D9E) Rabbit mAb #4060 (left) or PTEN (138G6) Rabbit mAb (right). Note the presence of P-Akt staining in the PTEN deficient MDA-MB-468 cells.


Background

PTEN (phosphatase and tensin homologue deleted on chromosome ten), also referred to as MMAC (mutated in multiple advanced cancers) phosphatase, is a tumor suppressor implicated in a wide variety of human cancers (1). PTEN encodes a 403 amino acid polypeptide originally described as a dual-specificity protein phosphatase (2). The main substrates of PTEN are inositol phospholipids generated by the activation of the phosphoinositide 3-kinase (PI3K) (3). PTEN is a major negative regulator of the PI3K/Akt signaling pathway (1,4,5). PTEN possesses a carboxy-terminal, noncatalytic regulatory domain with three phosphorylation sites (Ser380, Thr382, and Thr383) that regulate PTEN stability and may affect its biological activity (6,7). PTEN regulates p53 protein levels and activity (8) and is involved in G protein-coupled signaling during chemotaxis (9,10).

  1. Cantley, L.C. and Neel, B.G. (1999) Proc Natl Acad Sci USA 96, 4240-5.
  2. Myers, M.P. et al. (1997) Proc Natl Acad Sci USA 94, 9052-7.
  3. Myers, M.P. et al. (1998) Proc Natl Acad Sci USA 95, 13513-8.
  4. Wan, X. and Helman, L.J. (2003) Oncogene 22, 8205-11.
  5. Wu, X. et al. (1998) Proc Natl Acad Sci USA 95, 15587-91.
  6. Vazquez, F. et al. (2000) Mol Cell Biol 20, 5010-8.
  7. Torres, J. and Pulido, R. (2001) J Biol Chem 276, 993-8.
  8. Freeman, D.J. et al. (2003) Cancer Cell 3, 117-30.
  9. Funamoto, S. et al. (2002) Cell 109, 611-23.
  10. Iijima, M. and Devreotes, P. (2002) Cell 109, 599-610.

Application References

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Companion Products

Rabbit Monoclonals Produced Using Epitomics® Technology, U.S. Patent No. 5,675,063.

This product is intended for research purposes only. The product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.

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