Human Cardiotrophin-1 (Recombinant)

Recombinant Human Cardiotrophin-1 (CT-1)

Source: E.coli

Introduction: Cardiotrophin-1 (CT-1) is a 201 amino acid member of the interleukin-6 superfamily. It was identified by its ability to induce hypertrophic response in cardiac myocytes. CT-1 mRNA levels were found both in cardiac myocytes and in cardiac nonmyocytes. CT-1 was also detected in abundance in normal adult human lung and was expressed in both fetal and adult airway smooth muscle cells. CT-1activates gp130 dependent signaling and stimulates the Janus kinase/signal transducers and activators of transcription (JAK/STAT) pathway to transduce hypertrophic and cytoprotective signals in cardiac myocytes. CT-1 has also a neurotrophic function. CT-1 deficiency causes increased motoneuron cell death in spinal cord and brainstem nuclei of mice during a period between embryonic day 14 and the first postnatal week. Moreover, CT-1 is a hepatocyte survival factor that efficiently reduces hepatocellular damage in animal models of acute liver injury. CT-1 expression is augmented after hypoxic stimulation and it can protect cardiac cells when added either prior to simulated ischaemia or at the time of reoxygenation following simulated ischaemia. CT-1 can induce expression of the protective heat shock proteins (hsps) in cardiac cells. Cardiotrophin-1 increased ventricular expression of ANP, brain natriuretic peptide (BNP) and angiotensinogen mRNA. CT-1 levels were significantly elevated in patients with heart failure, patients with dilatative cardiomyopathy, moderate/severe mitral regurgitation, stable and unstable angina and after acute myocardial infarction.

Description: The Human Cardiotrophin His-Tagged Fusion Protein, produced in E. coli, is 22.5 kDa protein containing 200 amino acid residues of the human Cardiotrophin and 12 additional amino acid residues .

Amino acid sequence: MRGSHHHHHH GSSRREGSLE DPQTDSSVSL LPHLEAKIRQ THSLAHLLTK YAEQLLQEYV QLQGDPFGLPSFSPPRLPVA GLSAPAPSHA GLPVHERLRL DAAALAALPP LLDAVCRRQA ELNPRAPRLL RRLEDAARQA RALGAAVEAL LAALGAANRG PRAEPPAATA SAASATGVFP AKVLGLRVCG LYREWLSRTE GDLGQLLPGG SA.

Specificity: The amino acid sequence of the recombinant human cardiotrophin is 100% homologous to the amino acid sequence of the human cardiotrophin.

Purification Method: Three-step procedure using affinity Ni-NTA chromatography and size exclusion chromatography before and after refolding.

Purity: Purity of recombinant human cardiotrophin is >90% (SDS-PAGE analyzed).

Formulation: Sterile filtered and lyophilized from 0.5 mg/ml in 0.05M Acetate buffer pH4

Reconstitution: Add 0.2ml of 0.1M Acetate buffer pH4 and let the lyophilized pellet dissolve completely. For conversion into higher pH value, we recommend intensive dilution by relevant buffer to a concentration of 10 g/ml. In higher concentrations the solubility of this antigen is limited.

Storage: Store lyophilized protein at -20 C. Aliquot the product after reconstitution to avoid repeated freezing/thawing cycles. Reconstituted protein can be stored at 4 C for a limited period of time; it does not show any change after two weeks at 4 C. Please avoid freeze-thaw cycles.

Stability/Shelf Life: The lyophilized protein remains stable until the expiry date when stored at -20 C.

Applications: Western blotting

References: Freed DH, Moon MC, Borowiec AM, Jones SC, Zahradka P, Dixon IM. CT-1 expression in experimental myocardial infarction and potential role in post-MI wound healing. Mol Cell Biochem. 2003 Dec; 254(1-2): 247-56. Freed DH, Borowiec AM, Angelovska T, Dixon IM. Induction of protein synthesis in cardiac fibroblasts by cardiotrophin-1: integration of multiple signaling pathways. Cardiovasc Res. 2003 Nov 1; 60(2): 365-75. Bristow MR, Long CS. Cardiotrophin-1 in heart failure. Circulation. 2002 Sep 17; 106(12): 1430-2. Liao Z, Brar BK, Cai Q, Stephanou A, O\\\'Leary RM, Pennica D, Yellon DM, Latchman DS. Cardiotrophin-1 (CT-1) can protect the adult heart from injury when added both prior to ischaemia and at reperfusion. Cardiovasc Res. 2002 Mar; 53(4): 902-10.

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