Revision 1

#12683Store at -20C

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, IP

REACTIVITY:

H

SENSITIVITY:

Endogenous

MW (kDa):

130-180

Source/Isotype:

Rabbit IgG

UniProt ID:

#P08183

Entrez-Gene Id:

5243

Product Information

Product Usage Information

Application Dilution
Western Blotting 1:1000
Immunoprecipitation 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

MDR1/ABCB1 (D3H1Q) Rabbit mAb recognizes endogenous levels of total MDR1 protein.

Species Reactivity:

Human

Species predicted to react based on 100% sequence homology

Monkey

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues near the carboxy terminus of human MDR1 protein.

Background

MDR1/ABCB1 belongs to the Mdr/Tap subfamily of the ATP-binding cassette transporter superfamily (1). Multidrug resistance 1 (MDR1) serves as an efflux pump for xenobiotic compounds with broad substrate specificity. MDR1 substrates include therapeutic agents such as actinomycin D, etoposide, imatinib, and doxorubicin, as well as endogenous molecules including β-amyloids, steroid hormones, lipids, phospholipids, cholesterol, and cytokines (2). Research studies have shown that MDR1 reduces drug accumulation in cancer cells, allowing the development of drug resistance (3-5). On the other hand, MDR1 expressed in the plasma membrane of cells in the blood-brain, blood-cerebral spinal fluid, or blood-placenta barriers restricts the permeability of drugs into these organs from the apical or serosal side (6,7). MDR1 is also expressed in normal tissues with excretory function such as small intestine, liver, and kidney (7). Intracellular MDR1 has been detected in the ER, vesicles, and nuclear envelope, and has been associated with cell trafficking machinery (8). Other reported functions of MDR1 include viral resistance, cytokine trafficking (9,10), and lipid homeostasis in the peripheral and central nervous system (11-13).

  1. Furuya, K.N. et al. (1997) Cancer Res 57, 3708-16.
  2. Litman, T. et al. (1997) Biochim Biophys Acta 1361, 169-76.
  3. Chen, C.J. et al. (1986) Cell 47, 381-9.
  4. Kartner, N. et al. (1983) Cancer Res 43, 4413-9.
  5. Chen, G. et al. (1997) J Biol Chem 272, 5974-82.
  6. Brinkmann, U. and Eichelbaum, M. (2001) Pharmacogenomics J 1, 59-64.
  7. Fromm, M.F. (2004) Trends Pharmacol Sci 25, 423-9.
  8. Miller, D.S. et al. (2008) Pharmacol Rev 60, 196-209.
  9. Ambudkar, S.V. et al. (1999) Annu Rev Pharmacol Toxicol 39, 361-98.
  10. Raviv, Y. et al. (2000) FASEB J 14, 511-5.
  11. Meijer, O.C. et al. (2003) J Endocrinol 178, 13-8.
  12. Karssen, A.M. et al. (2002) J Endocrinol 175, 251-60.
  13. Jeannesson, E. et al. (2009) Clin Chim Acta 403, 198-202.

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 IP: Immunoprecipitation

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.
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.

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