CCDC24 antibodies are primarily utilized in:
Predicted Band Sizes: 25 kDa, 30 kDa, 34 kDa, or 47 kDa depending on isoforms and post-translational modifications .
Control Recommendations: Use recombinant CCDC24 protein fragments (e.g., aa 7–73) at 100x molar excess for blocking validation .
Pre-incubate antibodies with control protein fragments (30 minutes at room temperature) to confirm specificity in IHC and WB .
Rigorous validation ensures specificity:
Protein Arrays: Tested against 364 human recombinant proteins to minimize cross-reactivity .
Tissue Microarrays: Screened on 44 normal and 20 cancerous human tissues .
Band Confirmation: Observed bands in WB align with predicted molecular weights (e.g., 25–47 kDa) .
Uncharacterized Function: The biological role of CCDC24 remains unknown, limiting mechanistic studies .
Antibody Specificity: Variability in observed band sizes suggests potential isoform diversity or post-translational modifications .
Species Restrictions: Limited cross-reactivity data for non-human models beyond murine orthologs .
CCDC24, or coiled-coil domain-containing protein 24, is involved in various cellular processes including cell proliferation, differentiation, cell cycle regulation, and DNA damage response. Its potential role in cancer development and progression makes it a significant target for research into cancer biology and therapeutic development. The protein's involvement in these fundamental cellular processes provides researchers with opportunities to understand critical regulatory mechanisms in both normal and pathological contexts .
Several types of CCDC24 antibodies are available for research use. These include polyclonal antibodies such as the PACO38534 from Assay Genie and AP18327a from Abcepta. These antibodies are typically raised in rabbits against human CCDC24 protein. The antibodies may target different regions of the protein, with some specific to the N-terminal region (amino acids 1-30), while others recognize the full-length protein (1-307 amino acids). These are available in unconjugated forms as well as conjugated to various labels including FITC, Biotin, APC, and HRP depending on experimental requirements .
CCDC24 antibodies have been validated for several experimental applications including:
Western Blotting (WB): For detecting CCDC24 protein in cell or tissue lysates
ELISA (Enzyme-Linked Immunosorbent Assay): For quantitative detection
IHC (Immunohistochemistry): For localization of the protein in tissue sections
E (ELISA): For specific detection in complex samples
The recommended dilutions vary by application, typically ranging from 1:500-1:2000 for Western blot, 1:2000-1:10000 for ELISA, and 1:20-1:200 for IHC, though researchers should optimize these for their specific experimental conditions .
To validate CCDC24 antibody specificity, implement a multi-step approach:
Positive and negative controls: Use cell lines known to express CCDC24 (e.g., MCF-7 has been documented) as positive controls and include knockout/knockdown samples as negative controls.
Epitope competition assay: Pre-incubate the antibody with the immunizing peptide before application to demonstrate binding specificity.
Multiple antibody validation: Compare results using antibodies targeting different epitopes of CCDC24 (such as N-terminal specific vs. full-length protein antibodies).
Western blot analysis: Confirm single-band specificity at the expected molecular weight (calculated MW is approximately 34kDa).
Cross-reactivity assessment: Test the antibody on samples from other species if cross-reactivity is claimed by the manufacturer .
For optimal CCDC24 antibody preservation and functionality:
Short-term storage (up to 2 weeks): Maintain refrigerated at 2-8°C.
Long-term storage: Store at -20°C in small aliquots to prevent repeated freeze-thaw cycles which can damage the antibody.
Buffer conditions: Most CCDC24 antibodies are supplied in PBS with 0.09% sodium azide and may contain glycerol (up to 50%) as a cryoprotectant.
Handling: Avoid repeated freeze-thaw cycles by preparing single-use aliquots immediately upon receipt.
Working dilutions: Prepare fresh working dilutions on the day of the experiment for optimal results.
Temperature transitions: Allow the antibody to equilibrate to room temperature before opening to prevent condensation .
For optimal Western blot results with CCDC24 antibodies:
Sample preparation:
Lyse cells in RIPA buffer with protease inhibitors
Determine protein concentration (BCA/Bradford assay)
Load 20-50μg total protein per lane
Gel electrophoresis:
Use 10-12% polyacrylamide gels
Include positive control (e.g., MCF-7 cell lysate)
Transfer and blocking:
Transfer to PVDF membrane (preferred over nitrocellulose)
Block with 5% non-fat milk or BSA in TBST for 1 hour at room temperature
Primary antibody incubation:
Dilute antibody 1:500-1:2000 in blocking buffer
Incubate overnight at 4°C with gentle agitation
Detection:
Use appropriate HRP-conjugated secondary antibody (anti-rabbit IgG)
Visualize using enhanced chemiluminescence
Expected result:
For investigating CCDC24's role in cancer progression:
Expression profiling across cancer stages:
Use IHC with CCDC24 antibodies on tissue microarrays containing samples from different cancer stages
Quantify expression levels using digital pathology software
Correlate expression with clinical parameters including tumor stage, grade, and patient survival
Mechanistic studies:
Combine CCDC24 immunodetection with markers of cell cycle (Ki67, cyclins) and DNA damage response (γH2AX, 53BP1)
Implement dual immunofluorescence to assess co-localization with other proteins
Use proximity ligation assays to detect protein-protein interactions involving CCDC24
Response to treatment:
Monitor CCDC24 expression before and after treatment with chemotherapeutic agents
Correlate changes in expression with treatment response
Functional validation:
Critical methodological considerations for IHC with CCDC24 antibodies:
Tissue preparation and fixation:
Optimal fixation: 10% neutral buffered formalin for 24-48 hours
Paraffin embedding with standard protocols
Section thickness: 4-5μm for optimal staining
Antigen retrieval methods:
Heat-induced epitope retrieval (HIER) using citrate buffer (pH 6.0) or EDTA buffer (pH 9.0)
Pressure cooker treatment for 15-20 minutes recommended
Blocking strategies:
Block endogenous peroxidase with 3% H₂O₂
Use species-appropriate serum (5-10%) to reduce background
Include avidin/biotin blocking if using biotin-based detection systems
Antibody optimization:
Test multiple dilutions (starting range 1:20-1:200)
Optimize incubation time and temperature (overnight at 4°C or 1-2 hours at room temperature)
Detection systems:
Polymer-based detection systems provide better signal-to-noise ratio than ABC methods
Consider tyramide signal amplification for low-abundance proteins
Controls:
Integrating CCDC24 antibodies with Mendelian Randomization approaches:
Genotype-protein expression correlation:
Use CCDC24 antibodies to quantify protein levels in samples with known SNP genotypes
Correlate specific SNPs (identified in GWAS studies) with CCDC24 protein expression
Establish whether genetic variants influence protein abundance or post-translational modifications
Tissue-specific expression analysis:
Apply IHC or Western blot in multiple tissue types from individuals with different genotypes
Determine whether genetic associations with disease are mediated through tissue-specific expression patterns
Functional validation of causal SNPs:
Employ CCDC24 antibodies to assess how manipulation of causal SNPs affects protein expression
Use CRISPR-Cas9 gene editing to introduce SNP variants and monitor changes in protein expression
Protein-protein interaction studies:
Implement co-immunoprecipitation with CCDC24 antibodies to identify interaction partners
Compare interaction profiles between different genotypes to identify mechanism-based differences
Longitudinal studies:
Common issues and their solutions when working with CCDC24 antibodies:
| Problem | Possible Causes | Solutions |
|---|---|---|
| No signal in Western blot | - Insufficient protein loaded - Antibody concentration too low - Protein degradation - Inefficient transfer | - Increase protein loading to 50-75μg - Increase antibody concentration (1:250-1:500) - Add fresh protease inhibitors during lysis - Verify transfer efficiency with reversible stain |
| Multiple bands in Western blot | - Non-specific binding - Protein degradation - Post-translational modifications | - Increase blocking time/concentration - Use freshly prepared samples - Try different antibody targeting different epitope |
| High background in IHC | - Insufficient blocking - Antibody concentration too high - Endogenous peroxidase activity | - Extend blocking step to 2 hours - Dilute antibody further (1:100-1:400) - Include additional H₂O₂ blocking step |
| Inconsistent staining patterns | - Fixation issues - Antigen masking - Antibody batch variation | - Standardize fixation protocols - Test different antigen retrieval methods - Validate each new antibody lot |
| Poor reproducibility | - Storage degradation - Protocol inconsistencies - Sample heterogeneity | - Use fresh aliquots for critical experiments - Maintain detailed protocol documentation - Increase biological and technical replicates |
These troubleshooting approaches should be systematically implemented while maintaining appropriate controls throughout .
Interpreting differential CCDC24 staining patterns requires careful consideration:
Biological relevance assessment:
Cell type-specific expression patterns may reflect tissue-specific functions
Subcellular localization differences (nuclear vs. cytoplasmic) may indicate different functional states
Expression intensity correlations with developmental stages or pathological conditions provide functional insights
Technical validation:
Confirm pattern specificity using multiple antibodies targeting different epitopes
Complement antibody-based detection with mRNA expression analysis (RT-PCR, RNA-seq)
Validate unusual patterns with orthogonal techniques (e.g., GFP-tagged protein expression)
Physiological context interpretation:
Cell cycle dependency: Synchronize cells and assess expression at different cell cycle phases
Stress response: Compare patterns before and after cellular stress (oxidative, genotoxic)
Differentiation status: Correlate with markers of cellular differentiation
Pathological significance:
To distinguish specific from non-specific binding with CCDC24 antibodies:
Peptide competition assays:
Pre-incubate the antibody with excess immunizing peptide
Specific binding should be significantly reduced or eliminated
Non-specific binding will likely remain unchanged
Knockout/knockdown validation:
Use CRISPR/Cas9 knockout or siRNA knockdown of CCDC24
Compare staining patterns between wild-type and knockout/knockdown samples
Specific signals should be substantially reduced in knockout/knockdown samples
Multiple antibody confirmation:
Use antibodies targeting different epitopes of CCDC24
Specific binding patterns should be consistent across antibodies
Discrepancies may indicate non-specific binding or post-translational modifications
Signal correlation with expression level:
Compare antibody signal intensity with known CCDC24 expression levels across different cell lines
Positive correlation supports specificity
Random pattern suggests non-specific binding
Isotype controls:
For investigating CCDC24's role in cervical carcinoma:
Expression profiling in disease progression:
Perform IHC analysis on tissue microarrays containing normal cervical tissue, cervical intraepithelial neoplasia (CIN) of various grades, and invasive carcinoma
Quantify expression levels and correlate with disease stage
Assess co-expression with HPV markers (E6/E7) to investigate virus-host interactions
Mechanistic studies:
Combine CCDC24 antibody detection with antibodies against DNA damage response proteins (γH2AX, BRCA1, 53BP1)
Investigate potential interactions between CCDC24 and immune response pathways using dual immunofluorescence
Explore CCDC24's relationship with antibody-mediated immune responses in cervical carcinoma patients
Genetic correlation studies:
Stratify tissue samples based on SNPs identified in Mendelian Randomization studies
Compare CCDC24 protein expression levels between different genotypes
Investigate whether specific SNPs (e.g., GCST90006901, GCST90006909) affect protein expression or localization
Response to therapy:
To investigate CCDC24's relationship with antibody-mediated immunity:
Co-expression analysis:
Use multi-color immunofluorescence to assess CCDC24 expression in immune cell populations
Focus on B cells, plasma cells, and follicular dendritic cells
Correlate CCDC24 expression with markers of B cell activation and antibody production
In vitro functional assays:
Modulate CCDC24 expression in B cell lines using overexpression/knockdown approaches
Assess effects on antibody production, class switching, and somatic hypermutation
Measure changes in signaling pathways involved in B cell activation
Patient-derived samples:
Compare CCDC24 expression in peripheral blood B cells from healthy donors versus patients with autoimmune diseases
Correlate expression levels with serum antibody titers and autoantibody presence
Investigate genetic associations between CCDC24 SNPs and antibody-mediated conditions
Animal models:
Generate CCDC24 knockout or transgenic mouse models
Characterize B cell development, antibody responses to antigens, and susceptibility to antibody-mediated diseases
Perform adoptive transfer experiments to isolate B cell-intrinsic effects
Mendelian Randomization approach:
Critical considerations for CCDC24 as a cancer biomarker:
Analytical validation:
Establish rigorous validation protocols using multiple CCDC24 antibodies
Determine sensitivity, specificity, reproducibility, and robustness across different sample types
Standardize scoring methods for quantitative assessment
Clinical validation:
Perform retrospective analysis on well-annotated clinical cohorts
Include samples from diverse patient populations and disease stages
Correlate expression with established prognostic factors and clinical outcomes
Technical standardization:
Develop standard operating procedures for sample preparation and staining
Establish quality control metrics for antibody lot-to-lot variation
Implement automated image analysis to reduce subjective interpretation
Biological context:
Consider the impact of tumor heterogeneity on expression patterns
Assess expression in the context of tumor microenvironment
Evaluate stability of expression over disease course and treatment
Comparison with existing biomarkers:
Perform head-to-head comparisons with established biomarkers
Assess incremental value when added to existing prognostic models
Evaluate cost-effectiveness and clinical utility
Potential for targeted therapy: