Catalogue

Background
Desmin is a 53 kDa intermediate filament protein that exhibits a high degree of tissue specificity, its expression being predominantly confined to all types of muscle cells (cardiac, skeletal and smooth muscle). Regulation of desmin expression is stage and tissue-specific, since it is induced during terminal development of, for example, skeletal muscle cell differentiation. In skeletal en cardiac muscle cells desmin is localized in the Z-disk region and at the intercalated disk. The expression pattern of desmin in smooth muscle is much more heterogenous. Coexpression of vimentin and desmin has been observed in tumors derived from muscle tissue, i.e. rhabdomyosarcomas and leiomyosarcomas. Furthermore, during myocard dysfunction dramatic changes in the distribution of desmin have been observed.

Source
RD301 is a mouse monoclonal IgG2b antibody derived by fusion of SP2/0-Ag14 Mouse myeloma cells with spleen cells from a Mouse immunized with a cytoskeletal extract of chicken gizzard.

Product
Each vial contains 100 ul 1 mg/ml purified monoclonal antibody in PBS containing 0.09% sodium azide.

Formulation: Each vial contains 100 ul 1 mg/ml purified monoclonal antibody in PBS containing 0.09% sodium azide.

Specificity
RD301 reacts exclusively with desmin, which is expressed in smooth and striated muscle cells and their tumors e.g. rhabdomyosarcoma and leiomyosarcoma.

Species Reactivity: The epitope recognized by RD301 is located in the tail domain of desmin encoded by the last three exons of the hamster desmin gene (Van den Heuvel et al., 1987).

Applications
RD301 is suitable for immunoblotting, immunocytochemistry on permeabilised cells and immunohistochemistry on frozen tissues. Optimal antibody dilution should be determined by titration; recommended range is 1:100 – 1:200 for immunohistochemistry with avidin-biotinylated Horseradish peroxidase complex (ABC) as detection reagent, and 1:100 – 1:1000 for immunoblotting applications.

Storage
The antibody is shipped at ambient temperature and may be stored at +4°C. For prolonged storage prepare appropriate aliquots and store at or below -20°C. Prior to use, an aliquot is thawed slowly in the dark at ambient temperature, spun down again and used to prepare working dilutions by adding sterile phosphate buffered saline (PBS, pH 7.2). Repeated thawing and freezing should be avoided. Working dilutions should be stored at +4°C, not refrozen, and preferably used the same day. If a slight precipitation occurs upon storage, this should be removed by centrifugation. It will not affect the performance or the concentration of the product.

Caution
This product is intended FOR RESEARCH USE ONLY, and FOR TESTS IN VITRO, not for use in diagnostic or therapeutic procedures involving humans or animals. It may contain hazardous ingredients. Please refer to the Safety Data Sheets (SDS) for additional information and proper handling procedures. Dispose product remainders according to local regulations.This datasheet is as accurate as reasonably achievable, but our company accepts no liability for any inaccuracies or omissions in this information.

References
1. Quax, W., van den Broek, L., Egberts, W. V., Ramaekers, F., and Bloemendal, H. (1985). Characterization of the Hamster desmin gene: expression and formation of desmin filaments in nonmuscle cells after gene transfer, Cell 43, 327-38. 2. Verhagen, A. P., Aalders, T. W., Ramaekers, F. C., Debruyne, F. M., and Schalken, J. A. (1988). Differential expression of Keratins in the basal and luminal compartments of Rat prostatic epithelium during degeneRation and regeneration, Prostate 13, 25-38. 3. Pieper, F. R., Schaart, G., Krimpenfort, P. J., Henderik, J. B., Moshage, H. J., van de Kemp, A., Ramaekers, F. C., Berns, A., and Bloemendal, H. (1989). Transgenic expression of the muscle-specific intermediate filament protein desmin in nonmuscle cells, J Cell Biol 108, 1009-24. 4. Schaart, G., Viebahn, C., Langmann, W., and Ramaekers, F. (1989). Desmin and titin expression in early postimplantation Mouse embryos, Development 107, 585-96. 6. Raats, J. M., Pieper, F. R., Vree Egberts, W. T., Verrijp, K. N., Ramaekers, F. C., and Bloemendal, H. (1990). Assembly of amino-terminally deleted desmin in vimentin-free cells, J Cell Biol 111, 1971-85. 7. Schaart, G., Pieper, F. R., Kuijpers, H. J., Bloemendal, H., and Ramaekers, F. C. (1991). Baby Hamster kidney (BHK-21/C13) cells can express striated muscle type proteins, Differentiation 46, 105-15. 8. Dispersyn, G. D., Geuens, E., Ver Donck, L., Ramaekers, F. C., and Borgers, M. (2001). Adult Rabbit cardiomyocytes undergo hibernation-like dedifferentiation when co-cultured with cardiac fibroblasts, Cardiovasc Res 51, 230-40. 9. Council, L., Hameed, O. (2009). Differential expression of immunohistochemical markers in bladder smooth muscle and myofibroblasts, and the potential utility of desmin, smoothelin, and vimentin in staging of bladder carcinoma Modern Pathology 22, 639-50.

Protein Reference(s)

Database Name: UniProt

Accession Number: P17661

Safety Datasheet(s) for this product: