Recombinant Human Cardiac Troponin T (TnT)

Recombinant Cardiac Troponin T (24102P) should be used in research applications because it provides a highly specific, standardized, and reproducible reagent for studying cardiac muscle physiology, developing diagnostic assays, and investigating cardiac pathologies such as myocardial infarction and cardiomyopathies.

Key scientific advantages:

• Specificity and Sensitivity: Cardiac troponin T (cTnT) is a highly specific marker for cardiac muscle injury, making it essential for research into myocardial infarction, heart failure, and other cardiac conditions. Recombinant cTnT retains the biochemical properties necessary for accurate detection and quantification in assays.

• Standardization: Recombinant cTnT enables consistent assay calibration and eliminates variability associated with native protein preparations. For example, third-generation diagnostic assays use recombinant cTnT as a standard, resulting in linear calibration curves and improved precision, especially at low concentrations. This is critical for reliable quantification in both basic research and clinical studies.

• Reproducibility: Recombinant production ensures batch-to-batch consistency, which is vital for longitudinal studies, assay development, and inter-laboratory comparisons. This reproducibility supports robust experimental design and data interpretation.

• Purity and Availability: Recombinant proteins are produced in controlled systems, allowing for high purity and eliminating the need for tissue extraction, which can be limited by supply and ethical considerations. This facilitates large-scale studies and high-throughput screening.

• Functional Relevance: cTnT is the tropomyosin-binding subunit of the troponin complex, regulating calcium sensitivity and actomyosin ATPase activity in cardiac muscle contraction. Recombinant forms are suitable for biochemical, structural, and functional studies, including ELISA, immunoassays, and mechanistic investigations.

• Genetic and Pathological Studies: Mutations in the TNNT2 gene encoding cTnT are linked to familial hypertrophic and dilated cardiomyopathies. Recombinant cTnT can be used to model these mutations, study their effects, and screen for therapeutic interventions.

Typical research applications include:

• Development and validation of diagnostic assays for cardiac injury (e.g., ELISA, chemiluminescent immunoassays).
• Mechanistic studies of cardiac muscle contraction and calcium signaling.
• Investigation of cardiomyopathies and genetic variants.
• Standardization of clinical laboratory tests for myocardial infarction and risk stratification.
• High-throughput screening for drug-induced cardiotoxicity.

In summary, recombinant cardiac troponin T (24102P) is preferred for its specificity, reproducibility, and suitability for both basic and translational cardiac research, as well as for assay development and clinical diagnostics.

Yes, Recombinant Cardiac Troponin T (24102P) from Leinco Technologies can be used as a standard for quantification or calibration in ELISA assays, provided that the assay is designed to detect human cardiac troponin T and the recombinant protein is compatible with the antibody pair used in your ELISA.

Key Points Supporting Its Use as a Standard:

• Recombinant Nature: Recombinant proteins are preferred for ELISA standards because they provide a consistent, well-defined, and reproducible source of antigen, which is essential for accurate quantification and assay calibration.
• Application: The product is specifically listed for use in ELISA applications.
• Reactivity: It is reactive with human cardiac troponin T, making it suitable for assays targeting the human protein.
• Literature Support: Multiple studies and commercial ELISA kits (e.g., Elecsys, Abcam, R&D Systems) use recombinant human cardiac troponin T as the standard for calibration, confirming its suitability for quantitative ELISA.

Important Considerations:

• Antibody Compatibility: Ensure that the capture and detection antibodies in your ELISA recognize the recombinant protein in the same way as the native protein in your samples.
• Purity and Concentration: Use a reliable method (e.g., BCA, Bradford, or absorbance at 280 nm) to accurately determine the concentration of the recombinant protein before preparing the standard curve.
• Matrix Effects: If your samples are in a complex matrix (e.g., serum, plasma), consider whether the recombinant protein should be diluted in a similar matrix to minimize matrix effects.

Best Practices:

• Always generate a standard curve using serial dilutions of the recombinant protein.
• Validate the standard curve with known positive controls or reference materials if available.
• Follow the manufacturer’s instructions for reconstitution and storage to maintain protein integrity.

In summary, Recombinant Cardiac Troponin T (24102P) is suitable for use as a standard in ELISA assays for quantification and calibration, as long as compatibility with your assay system is confirmed.

Based on the provided search results, the Recombinant Cardiac Troponin T (24102P) from Leinco Technologies has been validated for use in ELISA applications, as stated in the product details and supported by the manufacturer. The product page notes that "Each investigator should determine their own optimal working dilution for specific applications," and references lot-specific datasheets for updated information. However, the only application explicitly mentioned as validated is ELISA.

There is no direct evidence in the provided results that this specific product (24102P) has been validated in published research for other applications such as Western blot, immunoassay development, or clinical diagnostics. The cited references and product descriptions from other suppliers mention broader uses for recombinant cardiac troponin T (such as research, assay development, and standardization), but these do not specifically reference the 24102P product in published studies.

Recombinant Cardiac Troponin T (24102P) is typically supplied as a sterile-filtered liquid in 20 mM Tris, pH 8.0, 10% glycerol. For cell culture experiments, you should use the protein directly from this solution or, if lyophilized, reconstitute according to the specific instructions provided with your lot. Below are best practices for preparation and handling:

1. If Supplied as a Liquid (as with 24102P):

• Dilute the protein to your desired working concentration using sterile, cell culture-grade buffer compatible with your assay (e.g., PBS or cell culture medium).
• Avoid repeated freeze-thaw cycles by aliquoting the protein into single-use volumes before freezing at −20 °C for long-term storage.
• For long-term storage, addition of 0.1% human or bovine serum albumin is recommended to stabilize the protein.
• Store at 4 °C if you will use the entire vial within 2–4 weeks; otherwise, store at −20 °C.

2. If Supplied Lyophilized:

• Check the datasheet or Certificate of Analysis (COA) for the recommended reconstitution buffer. For some recombinant cardiac troponin T proteins, a Tris/urea buffer (20 mM Tris, pH 7.5, 7 M urea, 5 mM EDTA, 15 mM 2-mercaptoethanol) is recommended to achieve a concentration close to 1 mg/mL.
• Gently add the buffer to the vial, let it sit at room temperature for 15–30 minutes with gentle agitation to fully dissolve the protein.
• Aliquot the reconstituted protein to avoid repeated freeze-thaw cycles.
• Store reconstituted protein at −70 °C for maximum stability.

3. General Considerations for Cell Culture:

• If the protein contains glycerol or urea, ensure that the final concentration in your cell culture medium is compatible with cell viability. You may need to further dilute the protein or perform a buffer exchange (e.g., by dialysis or ultrafiltration) to remove these additives before adding to cells.
• Sterility: Always use sterile technique and sterile buffers to prevent contamination.
• Endotoxin: If using in sensitive cell culture systems, confirm that the endotoxin level is acceptable for your application (typically <1 EU/μg).

Summary Table: Preparation Steps

Always consult the lot-specific datasheet or COA for precise instructions, as formulations and recommended procedures may vary between lots and suppliers. If you need to remove glycerol or urea for cell culture compatibility, use dialysis or a desalting column prior to use.