Revision 5
Cell Signaling Technology

Orders: 877-616-CELL (2355) [email protected]

Support: 877-678-TECH (8324)

Web: [email protected] cellsignal.com

3 Trask LaneDanversMassachusetts01923USA
For Research Use Only. Not for Use in Diagnostic Procedures.
Applications:

WB, W-S, IP, ChIP

REACTIVITY:

H

SENSITIVITY:

Endogenous

MW (kDa):

80

Source/Isotype:

Rabbit IgG

UniProt ID:

#P10275-3

Entrez-Gene Id:

367

Product Information

Product Usage Information

Application Dilution
Western Blotting 1:1000
Simple Western™ 1:50 - 1:250
Immunoprecipitation 1:200
Chromatin IP 1:50

Storage

Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

Specificity / Sensitivity

Androgen Receptor (AR-V7 Specific) (E3O8L) Rabbit mAb recognizes endogenous levels of total AR-V7 protein. This antibody does not cross-react with full-length AR protein, but immunoprecipitates a 120 kDa protein of unknown identity.

Species Reactivity:

Human

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Leu639 of human androgen receptor (V7 isoform) protein.

Background

Androgen receptor (AR), a zinc finger transcription factor belonging to the nuclear receptor superfamily, is activated by phosphorylation and dimerization upon ligand binding (1). This promotes nuclear localization and binding of AR to androgen response elements in androgen target genes. Research studies have shown that AR plays a crucial role in several stages of male development and the progression of prostate cancer (2,3).
The AR3 or AR-V7 isoform, which lacks the typical ligand binding domain, is created through the alternative splicing of cryptic exons (4-5). AR-V7 is frequently expressed in castration-resistant prostate cancer (CRPC) and while dependent on the activity of the full-length androgen receptor (AR-FL), AR-V7 can activate a completely distinct transcriptional program (6-8). While enzalutamide and abiraterone have been beneficial in treating CRPC through the ligand binding domain of AR-FL, resistance in patients has been shown to be associated with AR-V7 detection in circulating tumor cells (9-12). Studies probing into mechanisms of overcoming this resistance are currently being explored and may help in stratifying patient populations for more personalized therapies (13-15).

  1. Li, J. and Al-Azzawi, F. (2009) Maturitas 63, 142-8.
  2. Avila, D.M. et al. (2001) J. Steroid. Biochem. Mol. Biol. 76, 135-142.
  3. Montgomery, J.S. et al. (2001) J. Pathol. 195, 138-146.
  4. Hu, R. et al. (2009) Cancer Res 69, 16-22.
  5. Guo, Z. et al. (2009) Cancer Res 69, 2305-13.
  6. Watson, P.A. et al. (2010) Proc Natl Acad Sci U S A 107, 16759-65.
  7. Sun, S. et al. (2010) J Clin Invest 120, 2715-30.
  8. Hu, R. et al. (2012) Cancer Res 72, 3457-62.
  9. Scher, H.I. et al. (2012) N Engl J Med 367, 1187-97.
  10. de Bono, J.S. et al. (2011) N Engl J Med 364, 1995-2005.
  11. Ryan, C.J. et al. (2013) N Engl J Med 368, 138-48.
  12. Antonarakis, E.S. et al. (2014) N Engl J Med 371, 1028-38.
  13. Liu, C. et al. (2014) Clin Cancer Res 20, 3198-3210.
  14. Sarwar, M. et al. (2016) Oncotarget 7, 63065-63081.
  15. Ku, S.Y. et al. (2017) Science 355, 78-83.

Species Reactivity

Species reactivity is determined by testing in at least one approved application (e.g., western blot).

Western Blot Buffer

IMPORTANT: For western blots, incubate membrane with diluted primary antibody in 5% w/v BSA, 1X TBS, 0.1% Tween® 20 at 4°C with gentle shaking, overnight.

Applications Key

WB: Western Blotting W-S: Simple Western™ IP: Immunoprecipitation ChIP: Chromatin IP

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

Trademarks and Patents

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
CST is a registered trademark of Cell Signaling Technology, Inc.
XP is a registered trademark of Cell Signaling Technology, Inc.
All other trademarks are the property of their respective owners. Visit cellsignal.com/trademarks for more information.

使用に関する制限

法的な権限を与えられたCSTの担当者が署名した書面によって別途明示的に合意された場合を除き、 CST、その関連会社または代理店が提供する製品には以下の条件が適用されます。お客様が定める条件でここに定められた条件に含まれるものを超えるもの、 または、ここに定められた条件と異なるものは、法的な権限を与えられたCSTの担当者が別途書面にて受諾した場合を除き、拒絶され、 いかなる効力も効果も有しません。

研究専用 (For Research Use Only) またはこれに類似する表示がされた製品は、 いかなる目的についても FDA または外国もしくは国内のその他の規制機関により承認、認可または許可を受けていません。 お客様は製品を診断もしくは治療目的で使用してはならず、また、製品に表示された内容に違反する方法で使用してはなりません。 CST が販売または使用許諾する製品は、エンドユーザーであるお客様に対し、使途を研究および開発のみに限定して提供されるものです。 診断、予防もしくは治療目的で製品を使用することまたは製品を再販売 (単独であるか他の製品等の一部であるかを問いません) もしくはその他の商業的利用の目的で購入することについては、CST から別途許諾を得る必要があります。 お客様は以下の事項を遵守しなければなりません。(a) CST の製品 (単独であるか他の資材と一緒であるかを問いません) を販売、使用許諾、貸与、寄付もしくはその他の態様で第三者に譲渡したり使用させたりしてはなりません。また、商用の製品を製造するために CST の製品を使用してはなりません。(b) 複製、改変、リバースエンジニアリング、逆コンパイル、 分解または他の方法により製品の構造または技術を解明しようとしてはなりません。また、 CST の製品またはサービスと競合する製品またはサービスを開発する目的で CST の製品を使用してはなりません。(c) CST の製品の商標、商号、ロゴ、特許または著作権に関する通知または表示を除去したり改変したりしてはなりません。(d) CST の製品をCST 製品販売条件(CST’s Product Terms of Sale) および該当する書面のみに従って使用しなければなりません。(e) CST の製品に関連してお客様が使用する第三者の製品またはサービスに関する使用許諾条件、 サービス提供条件またはこれに類する合意事項を遵守しなければなりません。

Revision 5
#19672

Androgen Receptor (AR-V7 Specific) (E3O8L) Rabbit mAb

Western Blotting Image 1: Androgen Receptor (AR-V7 Specific) (E3O8L) Rabbit mAb Expand Image
Western blot analysis of extracts from various cell lines using Androgen Receptor (AR-V7 Specific) (E3O8L) Rabbit mAb (upper) and Β-Actin (D6A8) Rabbit mAb #8457 (lower). Signal corresponding to the androgen receptor V7 isoform is detected in 22Rv1 and VCAP cells (AR-V7-positive), but is not detected in LNCaP and DU 145 cells (AR-V7-negative), confirming specificity of the antibody.
Western Blotting Image 1: Androgen Receptor (AR-V7 Specific) (E3O8L) Rabbit mAb Expand Image
Simple Western™ analysis of lysates (1 mg/mL) from 22Rv-1 cells using Androgen Receptor (AR-V7 Specific) (E3O8L) Rabbit mAb #19672. The virtual lane view (left) shows a single target band (as indicated) at 1:50 and 1:250 dilutions of primary antibody. The corresponding electropherogram view (right) plots chemiluminescence by molecular weight along the capillary at 1:50 (blue line) and 1:250 (green line) dilutions of primary antibody. This experiment was performed under reducing conditions on the Jess™ Simple Western instrument from ProteinSimple, a BioTechne brand, using the 12-230 kDa separation module.
Immunoprecipitation Image 1: Androgen Receptor (AR-V7 Specific) (E3O8L) Rabbit mAb Expand Image
Immunoprecipitation of AR-V7 from 22Rv1 cell extracts. Lane 1 is 10% input, lane 2 is Rabbit (DA1E) mAb XP® Isotype Control #3900, and lane 3 is Androgen Receptor (AR-V7 Specific) (E3O8L) Rabbit mAb. Western blot analysis was performed using Androgen Receptor (AR-V7) (E3O8L) Rabbit mAb.
Chromatin Immunoprecipitation Image 1: Androgen Receptor (AR-V7 Specific) (E3O8L) Rabbit mAb Expand Image
Chromatin immunoprecipitations were performed with cross-linked chromatin from 22-RV-1 cells, treated with 10 nM DHT for 4hr and either Androgen Receptor (AR-V7 Specific) (E3O8L) Rabbit mAb or Normal Rabbit IgG #2729 using SimpleChIP® Plus Enzymatic Chromatin IP Kit (Magnetic Beads) #9005. The enriched DNA was quantified by real-time PCR using SPINK5 upstream primers, ABCB5 upstream primers, and SimpleChIP® Human α Satellite Repeat Primers #4486. The amount of immunoprecipitated DNA in each sample is represented as signal relative to the total amount of input chromatin, which is equivalent to one.