CCDC25 Antibody

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Description

CCDC25 Protein Target Overview

CCDC25 (coiled-coil domain containing 25) is a 208 amino acid human protein with a molecular weight of approximately 24-26 kDa, encoded by a gene located at chromosome 8p21.1 . The protein is highly conserved among mammals and diverse eukaryotes, including Arabidopsis thaliana, suggesting fundamental biological importance . Expression analysis indicates that CCDC25 is produced at levels approximately 4.2 times that of a typical human protein and is nearly ubiquitously expressed across human tissues .

The subcellular localization of CCDC25 was initially predicted to be nuclear , but more recent research has identified it as a transmembrane receptor at the cell membrane . This localization is particularly relevant to its function in sensing neutrophil extracellular traps (NETs) and triggering the ILK-PARVB pathway to enhance cell motility .

CCDC25 has demonstrated several important molecular interactions, including with Smad2, a transcription factor in the TGF-β signaling pathway . It has been identified as a substrate for several kinases including Casein Kinase 1, Casein Kinase 2, cGMP-dependent protein kinase, and the Insulin Receptor . Recent structural research has revealed that CCDC25 can bind to DNA, with the crystallographic structure of a CCDC25-DNA complex now available .

Structure and Expression

The crystallographic structure available in the RCSB Protein Data Bank (entry 7EOF) reveals how CCDC25 interacts with DNA . The complex has a total molecular weight of 57.88 kDa and contains 3,611 atoms across 393 modelled residues . This structural information provides valuable insights into the protein's functional mechanisms.

CCDC25 expression appears to have significant implications in cancer biology. Research has identified CCDC25 as potentially involved in liver metastasis in colon cancer and as a diagnostic and prognostic marker for hepatocellular carcinoma (HCC) . The gene is located on chromosome 8p, and a group of genes including CCDC25 is deleted on chromosome 8p in patients with poor HCC prognosis .

Types and Characteristics of CCDC25 Antibodies

CCDC25 antibodies are available in both polyclonal and monoclonal formats, each with distinct characteristics and applications. Understanding the differences between these antibody types is crucial for selecting the appropriate tool for specific research applications.

Polyclonal vs. Monoclonal CCDC25 Antibodies

Polyclonal CCDC25 antibodies contain a heterogeneous mixture of immunoglobulins that recognize different epitopes on the CCDC25 protein, whereas monoclonal antibodies consist of a homogeneous population targeting a single epitope . The table below summarizes the key differences between these antibody types:

CharacteristicPolyclonal CCDC25 AntibodiesMonoclonal CCDC25 Antibodies
SourceMultiple B cell clonesSingle B cell clone
Epitope recognitionMultiple epitopesSingle epitope
Production methodAnimal immunization (typically rabbit)Hybridoma technology
Batch consistencyMay vary between lotsHigh batch-to-batch reproducibility
SensitivityGenerally higher due to multiple epitope bindingMay be lower but more specific
Cross-reactivityPotentially higherLower, more specific
CostGenerally less expensiveMore expensive to produce
Development timeShorter (weeks to months)Longer (≈6 months)

Despite these differences, comparative studies have found that monoclonal antibodies generally perform equivalently to polyclonal antibodies in many applications . This finding supports the trend toward increased use of monoclonal antibodies for their reproducibility and consistency.

Common CCDC25 Antibody Formats

CCDC25 antibodies are available in various formats suitable for different experimental applications:

  1. Unconjugated primary antibodies - The most common format, used with secondary detection systems

  2. Conjugated antibodies - Including fluorophore-labeled (FITC, Alexa Fluor 594) for direct detection

  3. Enzyme-conjugated antibodies - HRP or AP conjugates for enhanced detection sensitivity

  4. Specialty formats - Including BSA-free preparations for conjugation flexibility

The host species for CCDC25 antibodies is predominantly rabbit, though mouse monoclonal antibodies are also available . Target epitopes vary between products, with common regions including amino acids 61-137 (internal region) , 143-192 (internal sequence) , and other regions of the protein.

Applications of CCDC25 Antibodies

CCDC25 antibodies have been validated for multiple laboratory applications, with performance characteristics varying based on the specific antibody clone and format.

Western Blot Applications

Western blotting represents one of the most common applications for CCDC25 antibodies. These antibodies typically detect a protein band at 24-26 kDa, corresponding to the predicted molecular weight of CCDC25 . Recommended dilutions range from 1:500 to 1:3000 for polyclonal antibodies and 1:5000 to 1:50000 for high-affinity recombinant monoclonal antibodies .

Western blot analysis has confirmed CCDC25 expression in multiple cell lines, including:

  • A549 cells

  • HeLa cells

  • Jurkat cells

  • K-562 cells

  • MCF-7 cells

  • RAW 264.7 cells (mouse)

Immunohistochemistry and Immunofluorescence

CCDC25 antibodies have demonstrated effectiveness in both immunohistochemistry (IHC) and immunofluorescence (IF) applications. For IHC applications, recommended dilutions typically range from 1:50 to 1:500 . Positive IHC staining has been documented in human stomach tissue and liver tissue samples .

For immunofluorescence applications, CCDC25 antibodies have successfully visualized the protein in cultured cells. In U2OS cells, for example, polyclonal antibodies at a 1:200 dilution have revealed localization to both the nucleus and cytoplasm , providing insights into the protein's distribution patterns.

ELISA and Other Quantitative Applications

Several ELISA kits have been developed for the quantitative measurement of CCDC25 in human biological samples . These assays typically employ the sandwich enzyme immunoassay technique, with a sensitivity range of approximately 0.156-10 ng/mL and a lower detection limit of <0.34 ng/mL .

The assay procedure generally follows this sequence:

  1. Antibody-coated microplate wells capture CCDC25 from samples

  2. Detection antibody binds to the captured CCDC25

  3. Enzyme conjugate (typically HRP) is added

  4. Substrate solution produces color proportional to CCDC25 concentration

  5. Signal is measured at 450nm with correction at 570nm or 630nm

These quantitative assays have proven valuable in studying CCDC25 levels in contexts such as hepatocellular carcinoma, where the protein may serve as a potential biomarker .

CCDC25 Antibodies in Research Applications

CCDC25 antibodies have played a crucial role in advancing our understanding of this protein's function in normal physiology and disease states. Recent research highlights several important areas where these antibodies have been instrumental.

Cancer Research and Biomarker Potential

CCDC25 appears to be involved in multiple cancer-related pathways:

  • Citrate cycle and metabolic reprogramming

  • Lipid and amino acid metabolism

  • PPAR signaling pathway

  • Nucleotide metabolism and apoptosis

  • Protein ubiquitination and DNA damage binding

These findings suggest that CCDC25 may function as a tumor suppressor gene in HCC, mediating apoptosis and metabolic regulation .

Neutrophil Extracellular Traps and Metastasis

One of the most significant recent discoveries involves CCDC25's role in neutrophil extracellular trap (NET)-mediated cancer metastasis. Research has identified CCDC25 as a transmembrane receptor that senses NETs and triggers signaling pathways enhancing cell motility .

A 2024 study demonstrated that CCDC25 forms a tripartite interaction with integrin beta-1 (ITGB1) and integrin-linked kinase (ILK) . Through co-immunoprecipitation assays using CCDC25 antibodies, researchers revealed that:

  1. Immunoprecipitation of ITGB1 pulled down both ILK and CCDC25, suggesting a multi-protein complex formation

  2. Exposure to NETs increased the interaction between CCDC25 and ILK

  3. This tripartite interaction promotes cancer cell invasion and metastasis

This groundbreaking research used both antibody-based detection and functional studies with CCDC25 knockdown to establish the protein's role in cancer progression .

Technical Considerations and Protocols

Successful use of CCDC25 antibodies requires attention to technical details regarding storage, handling, and experimental protocols.

Recommended Protocols

For Western Blot applications, a typical protocol includes:

  1. Protein separation and transfer to membrane

  2. Blocking with 5% non-fat dry milk or BSA in PBS-T

  3. Primary antibody incubation at recommended dilution (typically overnight at 4°C)

  4. Washing steps with PBS-T

  5. Secondary antibody incubation with HRP-conjugate

  6. Detection using ECL or similar system

For immunohistochemistry:

  1. Tissue preparation and antigen retrieval (typically TE buffer pH 9.0 or citrate buffer pH 6.0)

  2. Blocking step with serum

  3. Primary antibody incubation at 1:50-1:500 dilution

  4. Secondary detection system

  5. Counterstaining and mounting

Future Perspectives and Emerging Applications

As research into CCDC25 continues to evolve, several emerging applications for CCDC25 antibodies are becoming apparent:

  1. Therapeutic target validation - As CCDC25's role in cancer metastasis becomes better understood, antibodies will be critical for validating it as a potential therapeutic target

  2. Diagnostic development - Given CCDC25's potential as a biomarker, antibodies may find application in clinical diagnostic assays for cancer detection and prognosis

  3. Mechanistic studies - The emerging understanding of CCDC25's involvement in NET sensing and metastasis opens new avenues for mechanistic research using antibody-based techniques

  4. Single-cell analysis - With advances in single-cell technologies, CCDC25 antibodies may contribute to understanding the protein's role at the individual cell level

The development of more specific, validated antibody reagents will be crucial for advancing these research areas and translating findings to clinical applications.

Product Specs

Buffer
Storage Buffer: PBS with 0.02% Sodium Azide, 50% Glycerol, pH 7.3. Storage Temperature: -20°C. Avoid freeze/thaw cycles.
Lead Time
We typically dispatch orders within 1-3 business days of receipt. Delivery times may vary based on shipping method and destination. Please consult your local distributor for specific delivery estimates.
Synonyms
CCDC25Coiled-coil domain-containing protein 25 antibody
Target Names
CCDC25
Uniprot No.

Target Background

Function
CCDC25 Antibody is a transmembrane receptor that detects neutrophil extracellular traps (NETs) and activates the ILK-PARVB pathway, enhancing cell motility. NETs, primarily composed of DNA fibers, are released by neutrophils to bind pathogens during inflammation. NET formation is also implicated in cancer metastasis, with NET-DNA acting as a chemoattractant for cancer cells. CCDC25 specifically binds to NETs via its extracellular region, particularly to 8-OHdG-enriched DNA within NETs. This binding recruits ILK, initiating the ILK-PARVB cascade and inducing cytoskeletal reorganization and directional cell migration. In the context of cancer, CCDC25 promotes metastasis by sensing NETs and facilitating tumor cell migration.
Database Links

HGNC: 25591

KEGG: hsa:55246

STRING: 9606.ENSP00000348933

UniGene: Hs.445512

Protein Families
CCDC25 family
Subcellular Location
Cell membrane; Single-pass membrane protein. Endomembrane system.

Q&A

What is CCDC25 and what are its key biological functions?

CCDC25 is a transmembrane receptor protein with a length of 208 amino acid residues and a molecular weight of approximately 24.5 kDa in humans. It localizes primarily to the cell membrane and has been reported to exist in up to two different isoforms . The protein is widely expressed across multiple tissue types and functions as a receptor that senses neutrophil extracellular traps (NETs), subsequently triggering the ILK-PARVB signaling pathway to enhance cellular motility .

CCDC25 appears to play important roles in multiple cellular processes, including:

  • Regulation of cell motility and migration

  • Modulation of glucose metabolism

  • Involvement in fatty acid and amino acid metabolism

  • Participation in ubiquitination modification processes

  • Influence on apoptotic pathways

Evolutionarily, CCDC25 is well-conserved, with orthologs identified in multiple species including mouse, rat, bovine, frog, zebrafish, chimpanzee, and chicken .

How is CCDC25 expression regulated in normal versus disease states?

CCDC25 expression varies significantly between normal and disease states, with particularly notable dysregulation in several cancer types. Analysis of multiple databases including TCGA and GEO reveals that CCDC25 is significantly underexpressed in hepatocellular carcinoma (HCC) compared to normal liver tissue . This downregulation has been observed consistently across multiple independent datasets (GSE14520, GSE22058, GSE25097, GSE36376, GSE54236, GSE63898, GSE64041, and TCGA-LIHC) .

Interestingly, CCDC25 expression patterns vary across cancer types. While expression is decreased in HCC, it shows elevated levels in skin cutaneous melanoma (SKCM) with metastasis compared to primary SKCM . Additionally, HPV-positive samples have been associated with higher CCDC25 expression .

The regulation of CCDC25 may involve epigenetic mechanisms, as methylation analysis has identified specific methylation sites associated with CCDC25 downregulation in HCC patients, which correlates with poorer prognosis .

What are the optimal conditions for CCDC25 antibody application in Western blot experiments?

For optimal Western blot detection of CCDC25, researchers should consider the following methodological approach:

It is recommended to include positive controls (such as lysates from A549 or HeLa cells) to validate antibody performance .

How should immunohistochemistry protocols be optimized for CCDC25 detection in tissue samples?

For effective immunohistochemical detection of CCDC25 in tissue samples, researchers should follow these methodological guidelines:

  • Tissue preparation: Standard formalin fixation and paraffin embedding procedures are suitable for CCDC25 detection. Human stomach tissue has been validated as a positive control for CCDC25 IHC .

  • Antigen retrieval: Two effective options are available:

    • TE buffer at pH 9.0 (preferred method)

    • Alternatively, citrate buffer at pH 6.0

  • Blocking conditions: Incubate sections with 20% fetal bovine serum for approximately 2 hours at room temperature to reduce non-specific binding .

  • Primary antibody: Use anti-CCDC25 polyclonal antibody at dilutions ranging from 1:50 to 1:500, with overnight incubation at 4°C .

  • Secondary detection system: Commercial detection systems such as Dako EnVision+ System-HRP Labelled Polymer are effective, with a recommended incubation time of 1 hour .

  • Signal development: Develop signal using 3,3′-diaminobenzidine (DAB) with a 5-minute incubation in the dark at room temperature .

  • Counterstaining: Standard hematoxylin counterstaining can be employed to visualize tissue architecture.

Researchers should note that CCDC25 antibody performance in IHC may vary between tissue types, requiring optimization for each specific application and tissue source.

What considerations are important for immunofluorescence applications of CCDC25 antibodies?

Immunofluorescence is one of the most widely used applications for CCDC25 antibodies . For optimal results, researchers should consider:

  • Fixation method: Standard 4% paraformaldehyde fixation is generally effective, though methanol fixation may preserve certain epitopes better for some antibodies.

  • Permeabilization: Since CCDC25 is a transmembrane protein, gentle permeabilization with 0.1-0.2% Triton X-100 is typically adequate.

  • Blocking: 5-10% normal serum (matching the species of the secondary antibody) in PBS with 0.1% Triton X-100 for 1 hour at room temperature.

  • Primary antibody incubation: CCDC25 antibodies should be diluted appropriately (typically starting at 1:100-1:500) and incubated overnight at 4°C.

  • Secondary antibody selection: Use fluorophore-conjugated secondary antibodies that match the host species of the primary antibody.

  • Expected localization: Since CCDC25 is a membrane protein , researchers should expect predominant membrane staining, with possible additional subcellular localizations depending on cell type and condition.

  • Controls: Include appropriate negative controls (omitting primary antibody) and positive controls (cell lines known to express CCDC25 such as A549 or HeLa cells) .

For co-localization studies, CCDC25 can be paired with markers for cell membrane and components of the ILK-PARVB pathway to better understand its functional interactions.

How does CCDC25 expression correlate with cancer prognosis, particularly in hepatocellular carcinoma?

CCDC25 expression has emerged as a significant prognostic indicator in hepatocellular carcinoma (HCC). Comprehensive analysis of multiple datasets reveals a robust association between CCDC25 expression levels and patient outcomes:

These findings indicate that CCDC25 not only serves as a potential prognostic biomarker for HCC patient outcomes but may also function as a valuable diagnostic tool, possibly in combination with established markers like AFP.

What is the relationship between CCDC25 and the tumor immune microenvironment?

CCDC25 exhibits significant interactions with the tumor immune microenvironment (TME), particularly in hepatocellular carcinoma. Comprehensive analyses using TIMER database and CIBERSORT algorithm have revealed:

  • Positive correlations with immune cell populations: CCDC25 expression positively correlates with several key immune cell types:

    • CD8+ T cells

    • Macrophages

    • Neutrophils

    • Dendritic cells

  • Differential immune cell infiltration based on CCDC25 expression:

    • High CCDC25 expression correlates with elevated levels of:

      • Naïve B cells

      • M2 macrophages

      • Activated mast cells

      • Neutrophils

    • Low CCDC25 expression associates with increased:

      • Memory B cells

      • Regulatory T cells (Tregs)

  • Immune checkpoint interaction: CCDC25 expression shows negative correlations with multiple immune checkpoint molecules:

    • PDCD1 (PD-1)

    • CTLA4

    • TIGIT

    • TIM3 (HAVCR2)

The pattern of immune cell infiltration suggests CCDC25 may promote antitumor immunity through several mechanisms:

  • Upregulation of CD8+ T cells and dendritic cells, which are critical for tumor cell recognition and elimination

  • Downregulation of Treg cells, which typically suppress antitumor immune responses

  • Inhibition of immune checkpoint expression, potentially reducing tumor immune escape

These findings suggest CCDC25 may influence immunotherapy outcomes in HCC patients, with potential implications for developing combination therapeutic strategies.

How can CCDC25 be utilized as a biomarker in cholangiocarcinoma diagnosis?

CCDC25 has shown promise as a potential diagnostic biomarker for cholangiocarcinoma (CCA). Research indicates that serum CCDC25 levels may provide valuable diagnostic information:

  • Sample collection and processing: Serum samples from CCA patients, benign biliary disease (BBD) patients, and healthy controls (HC) can be analyzed for CCDC25 levels using dot blot assays .

  • Detection methodology: For quantitative assessment of serum CCDC25:

    • Dot blot assays using anti-CCDC25 antibodies (typically rabbit polyclonal antibodies against human CCDC25)

    • Standard curves generated using recombinant CCDC25 protein

    • Signal detection using enhanced chemiluminescence and quantification on imaging systems

  • Result interpretation: Comparative analysis of CCDC25 levels between CCA, BBD, and HC groups can help establish diagnostic thresholds.

  • Complementary tissue analysis: Immunohistochemical analysis of CCA tissue samples can provide additional validation of CCDC25 as a biomarker:

    • Use of anti-CCDC25 polyclonal antibodies (1:400 dilution)

    • Signal development with DAB followed by hematoxylin counterstaining

  • Statistical validation: Receiver operating characteristic (ROC) curve analysis should be performed to evaluate the sensitivity and specificity of serum CCDC25 as a diagnostic marker for CCA.

How does CCDC25 modulate cellular signaling pathways in cancer progression?

CCDC25's role in cellular signaling pathways is complex and appears to significantly impact cancer progression through multiple mechanisms:

  • ILK-PARVB pathway activation: CCDC25 functions as a transmembrane receptor that senses neutrophil extracellular traps (NETs) and subsequently triggers the ILK-PARVB pathway, enhancing cell motility . In cancer contexts, this mechanism may influence:

    • Tumor cell migration and invasion capabilities

    • Metastatic potential, particularly in colon cancer liver metastasis

  • Metabolic pathway regulation: Gene Set Enrichment Analysis (GSEA) has identified CCDC25's involvement in regulating several key metabolic processes:

    • Glucose metabolism

    • Fatty acid metabolism

    • Amino acid metabolism, particularly valine, leucine, and isoleucine degradation

    • Lysine degradation

    Dysregulation of these metabolic pathways, potentially resulting from CCDC25 downregulation, may contribute to the metabolic reprogramming characteristic of cancer cells.

  • Protein homeostasis mechanisms: CCDC25 appears to influence:

    • Ubiquitin-mediated proteolysis

    • Ubiquitin-like protein-specific protease activity

    • Nuclear-transcribed mRNA catabolic processes

    These pathways are crucial for protein quality control and cellular homeostasis, with implications for cancer cell survival under stress conditions.

  • Apoptotic regulation: CCDC25 has been linked to apoptotic processes , suggesting it may play a role in regulating programmed cell death. Downregulation of CCDC25 could potentially contribute to apoptosis resistance in cancer cells.

  • Cell adhesion modulation: CCDC25 involvement in adherens junction regulation suggests a potential role in cell-cell adhesion, with implications for epithelial-mesenchymal transition and cancer invasion.

The multifaceted influence of CCDC25 on these signaling pathways highlights its complex role in cancer biology, potentially explaining its prognostic significance in HCC and other cancers.

What is the relationship between CCDC25 expression and chemotherapy response in cancer patients?

CCDC25 expression levels appear to significantly influence chemotherapy response, particularly in hepatocellular carcinoma (HCC) patients. Analysis of drug sensitivity in relation to CCDC25 expression has revealed several important patterns:

These findings suggest CCDC25 may serve as a valuable predictive biomarker for chemotherapy response in HCC, potentially improving treatment stratification and outcomes through more personalized therapeutic approaches.

How might epigenetic regulation of CCDC25 contribute to its expression patterns in cancer?

Epigenetic mechanisms appear to play a significant role in regulating CCDC25 expression, particularly in the context of hepatocellular carcinoma (HCC). Analysis of DNA methylation patterns has provided important insights:

  • Methylation site identification: Research utilizing the MethSurv database has identified specific methylation sites in the CCDC25 gene that correlate with expression levels and patient outcomes . These sites may represent critical regulatory regions that control CCDC25 transcription.

  • Correlation with expression: DNA methylation at these sites likely contributes to the observed downregulation of CCDC25 in HCC patients . Hypermethylation of promoter regions typically leads to transcriptional silencing, which aligns with the reduced CCDC25 expression observed in HCC compared to normal liver tissue.

  • Prognostic significance: The identified methylation sites may be responsible for the poor prognosis associated with low CCDC25 expression in HCC patients . This suggests epigenetic silencing of CCDC25 may be a key event in hepatocarcinogenesis.

  • Technical approaches for methylation analysis:

    • Bisulfite sequencing of CCDC25 regulatory regions

    • Methylation-specific PCR (MSP) to detect specific methylated regions

    • Pyrosequencing for quantitative methylation analysis

    • Integration with expression data to establish methylation-expression correlations

  • Potential therapeutic implications: The identification of methylation as a mechanism for CCDC25 downregulation suggests potential for epigenetic therapies:

    • DNA methyltransferase inhibitors (DNMTi) like azacitidine or decitabine might restore CCDC25 expression

    • Combination approaches with histone deacetylase inhibitors (HDACi) could further enhance re-expression

    • Targeting specific epigenetic readers, writers, or erasers that regulate CCDC25 methylation

Understanding the epigenetic regulation of CCDC25 provides insights into cancer-specific expression patterns and may offer novel therapeutic targets to restore normal CCDC25 expression in cancer contexts.

What are common technical challenges in CCDC25 antibody experiments and how can they be addressed?

Researchers working with CCDC25 antibodies may encounter several technical challenges. Here are common issues and recommended solutions:

  • Non-specific binding in Western blot applications:

    • Problem: Multiple bands appearing at unexpected molecular weights

    • Solutions:

      • Optimize blocking conditions (try 5% non-fat dry milk or 5% BSA)

      • Increase antibody dilution (start with 1:3000 instead of 1:500)

      • Use more stringent washing conditions (increase wash duration or detergent concentration)

      • Validate antibody specificity with positive controls like A549 or HeLa cell lysates

      • Consider antibody pre-absorption with non-specific proteins

  • Weak signal in immunohistochemistry:

    • Problem: Insufficient or no staining despite proper technique

    • Solutions:

      • Optimize antigen retrieval (compare TE buffer pH 9.0 with citrate buffer pH 6.0)

      • Decrease antibody dilution (try 1:50 instead of 1:500)

      • Extend primary antibody incubation time (up to 48 hours at 4°C)

      • Enhance signal amplification systems (consider tyramide signal amplification)

      • Ensure tissue is properly fixed and processed

  • High background in immunofluorescence:

    • Problem: Non-specific fluorescence obscuring specific signal

    • Solutions:

      • Extend blocking time (2 hours minimum)

      • Use higher concentration of blocking serum (15-20% instead of 5-10%)

      • Include 0.1-0.3% Triton X-100 in blocking and antibody solutions

      • Perform additional washing steps between antibody incubations

      • Use centrifugation-cleared antibody solutions (14,000g for 10 minutes)

  • Inconsistent results between samples:

    • Problem: Variable staining intensity across similar samples

    • Solutions:

      • Standardize sample collection and processing protocols

      • Process all samples simultaneously when possible

      • Include internal reference standards in each experiment

      • Ensure consistent antibody storage conditions (avoid freeze-thaw cycles)

      • Validate antibody lot-to-lot consistency before initiating large studies

  • Detection challenges in tissues with low CCDC25 expression:

    • Problem: Difficulty detecting CCDC25 in tissues with naturally low expression

    • Solutions:

      • Use more sensitive detection systems (e.g., Super Signal West Femto for Western blot)

      • Concentrate protein samples further

      • Consider RNA-level detection (RT-qPCR) as a complementary approach

      • Use cell models with known CCDC25 expression as positive controls

Implementing these troubleshooting strategies should help researchers overcome common technical challenges in CCDC25 antibody applications.

How can researchers validate CCDC25 antibody specificity for their experimental systems?

Thorough validation of CCDC25 antibody specificity is crucial for generating reliable and reproducible results. Researchers should implement a multi-faceted validation approach:

  • Positive and negative control samples:

    • Positive controls: Use cell lines with confirmed CCDC25 expression such as A549, HeLa, Jurkat, K-562, or MCF-7 cells

    • Negative controls: Implement one or more of the following:

      • CCDC25 knockout cell lines generated via CRISPR-Cas9

      • siRNA knockdown of CCDC25 (compare treated vs. untreated samples)

      • Tissue types known to have minimal CCDC25 expression

      • Primary antibody omission controls

  • Western blot validation:

    • Confirm single band at expected molecular weight (24-26 kDa)

    • Compare results with multiple anti-CCDC25 antibodies targeting different epitopes

    • Perform peptide competition assays using the immunizing peptide to demonstrate specificity

    • Use recombinant CCDC25 protein as a positive control

  • Immunoprecipitation validation:

    • Perform IP with anti-CCDC25 antibody followed by Western blot with a different anti-CCDC25 antibody

    • Confirm enrichment of CCDC25 in IP fractions vs. input samples

    • Consider mass spectrometry analysis of immunoprecipitated proteins to confirm CCDC25 presence

  • Immunofluorescence/IHC validation:

    • Compare staining patterns with multiple anti-CCDC25 antibodies

    • Verify expected subcellular localization (primarily membrane)

    • Demonstrate signal reduction in CCDC25 knockdown systems

    • Perform co-localization studies with established membrane markers

  • Molecular validation:

    • Correlate protein detection with mRNA expression data

    • Sequence verification of CCDC25 in your experimental system

    • Consider epitope tags on overexpressed CCDC25 to validate antibody co-localization

  • Publication cross-validation:

    • Compare results with published studies using the same or different antibodies

    • Reference antibody validation data from previous publications

    • Consider the validation resources provided by antibody manufacturers

What considerations are important when designing experiments to study CCDC25 in different cancer contexts?

When designing experiments to investigate CCDC25 in various cancer contexts, researchers should consider several important factors to ensure robust and clinically relevant results:

  • Cancer type-specific expression patterns:

    • CCDC25 shows variable expression across cancer types (downregulated in HCC but elevated in metastatic SKCM)

    • Design experiments to capture these cancer-specific patterns

    • Include tissue microarrays or multi-cancer cell line panels for comparative studies

    • Consider analyzing expression in relation to cancer subtypes and staging

  • Appropriate model systems:

    • Cell lines: Select models that reflect the cancer type of interest

      • Validated cell lines for CCDC25 studies include A549, HeLa, Jurkat, K-562, and MCF-7

      • Consider primary patient-derived cell models when possible

    • Animal models:

      • Develop xenograft or orthotopic models using cells with manipulated CCDC25 expression

      • Consider genetically engineered mouse models (GEMMs) with CCDC25 alterations

    • Patient samples:

      • Design studies with matched tumor and adjacent normal tissues

      • Consider longitudinal sampling when feasible (treatment-naive vs. post-treatment)

  • Functional assessment approaches:

    • Gain/loss of function studies:

      • CRISPR-Cas9 knockout or knockdown for loss-of-function

      • Overexpression systems for gain-of-function

      • Inducible expression systems for temporal control

    • Phenotypic assays:

      • Cell proliferation and viability assays

      • Migration and invasion assays (given CCDC25's role in cell motility)

      • Metabolic profiling (glucose uptake, fatty acid metabolism)

      • Drug sensitivity testing

  • Pathway and interaction analyses:

    • Focus on ILK-PARVB pathway components

    • Assess interactions with NETs (neutrophil extracellular traps)

    • Investigate relationships with immune checkpoint molecules (PDCD1, CTLA4, TIGIT, TIM3)

    • Analyze correlations with immune cell infiltration patterns

  • Clinical correlation design:

    • Integrate CCDC25 analysis with:

      • Patient survival data (OS, PFS, DSS)

      • Treatment response metrics

      • Existing clinical biomarkers (e.g., AFP for HCC)

      • Immune profile characterization

  • Technical considerations:

    • Antibody selection: Choose validated antibodies with demonstrated specificity

    • Application-specific optimization: Tailor protocols for WB, IHC, or IF based on cancer type

    • Quantification approaches: Implement digital pathology or automated quantification when possible

    • Multi-omics integration: Combine protein data with RNA-seq, methylation analysis, etc.

Thoughtfully addressing these considerations will enhance the clinical relevance and translational potential of CCDC25 research across diverse cancer contexts.

What novel approaches might advance our understanding of CCDC25's role in cancer metastasis?

Understanding CCDC25's contribution to cancer metastasis represents a frontier for future research, with several promising directions:

  • Advanced 3D and organoid models:

    • Develop patient-derived organoids with manipulated CCDC25 expression

    • Implement microfluidic organ-on-chip platforms to study CCDC25-mediated cell migration across tissue boundaries

    • Create co-culture systems with cancer cells and stromal/immune components to assess CCDC25's influence on the metastatic microenvironment

    • Utilize 3D extracellular matrix models to evaluate CCDC25's impact on invasive potential

  • In vivo metastasis tracking:

    • Generate fluorescently-labeled or bioluminescent cancer cells with CCDC25 modifications

    • Employ intravital microscopy to track cell movement and metastatic colonization in real-time

    • Develop conditional CCDC25 knockout/overexpression mouse models to study stage-specific effects on metastasis

    • Apply single-cell sequencing to track clonal evolution during metastatic progression

  • Mechanistic dissection of the NET-CCDC25-ILK-PARVB axis:

    • Perform detailed structural analysis of CCDC25-NET interactions

    • Map the precise signaling cascade from CCDC25 activation to enhanced cell motility

    • Develop specific inhibitors of CCDC25-NET binding to evaluate therapeutic potential

    • Investigate how this pathway interfaces with established metastasis-promoting mechanisms

  • Circulating tumor cell (CTC) analysis:

    • Evaluate CCDC25 expression in CTCs compared to primary tumors

    • Determine if CCDC25 levels in CTCs correlate with metastatic potential

    • Develop CTC isolation methods based on CCDC25 expression

    • Assess whether CCDC25 contributes to CTC survival in circulation

  • Translational approaches:

    • Create a multi-cancer metastasis tissue microarray to comprehensively profile CCDC25 expression

    • Develop liquid biopsy assays for CCDC25 protein or its modified forms

    • Evaluate CCDC25 as a predictor of metastatic progression in longitudinal patient cohorts

    • Design therapeutic approaches targeting the CCDC25 pathway to prevent metastasis

These approaches would significantly advance our understanding of CCDC25's role in metastasis and potentially identify new therapeutic strategies to prevent cancer spread.

How might CCDC25 research inform the development of novel cancer immunotherapies?

The emerging role of CCDC25 in immune regulation suggests several promising avenues for immunotherapy development:

  • Targeting CCDC25-NET interactions:

    • CCDC25 functions as a receptor for neutrophil extracellular traps (NETs) , which have been implicated in both pro- and anti-tumor immune responses

    • Therapeutic approaches could involve:

      • Small molecule inhibitors blocking CCDC25-NET binding

      • Antibody-based therapies neutralizing this interaction

      • Peptide mimetics that compete for binding sites

  • CCDC25-based stratification for immune checkpoint therapy:

    • CCDC25 expression negatively correlates with immune checkpoint molecules (PDCD1, CTLA4, TIGIT, TIM3)

    • This relationship could inform:

      • Patient selection for checkpoint inhibitor therapy

      • Combinatorial approaches targeting both CCDC25 and checkpoint pathways

      • Biomarker development for immunotherapy response prediction

  • Modulating tumor immune microenvironment:

    • CCDC25 expression correlates with specific immune cell infiltration patterns:

      • High CCDC25: increased naïve B cells, M2 macrophages, activated mast cells, neutrophils

      • Low CCDC25: elevated memory B cells and regulatory T cells (Tregs)

    • Therapeutic strategies could:

      • Restore CCDC25 expression to enhance CD8+ T cell and dendritic cell infiltration

      • Combine CCDC25-targeting with approaches to reduce Treg activity

      • Manipulate CCDC25 to reshape the balance of M1/M2 macrophages

  • Adoptive cell therapy enhancement:

    • Engineer T cells or NK cells to target tumor cells based on CCDC25 expression patterns

    • Modify CAR-T cell designs to incorporate CCDC25-related signaling components

    • Develop approaches to overcome immunosuppression associated with CCDC25 dysregulation

  • Vaccine development:

    • Identify CCDC25-derived peptides that could serve as tumor antigens

    • Design cancer vaccines incorporating these epitopes

    • Combine with adjuvants that enhance immune responses against CCDC25-expressing cells

  • Integration with existing immunotherapy platforms:

    • Evaluate how CCDC25 status affects response to:

      • Checkpoint inhibitors (anti-PD-1/PD-L1, anti-CTLA-4)

      • Cytokine therapies

      • Cancer vaccines

      • Oncolytic virotherapy

These approaches could leverage CCDC25 biology to enhance cancer immunotherapy efficacy, potentially addressing current limitations in immunotherapeutic response rates and durability.

What technological advancements might improve CCDC25 detection for cancer diagnostics?

Emerging technologies offer significant potential to enhance CCDC25 detection for clinical diagnostics:

  • Advanced antibody engineering:

    • Development of high-affinity recombinant antibodies with improved specificity

    • Single-domain antibodies (nanobodies) for accessing epitopes difficult to reach with conventional antibodies

    • Bispecific antibodies targeting CCDC25 along with complementary diagnostic markers

    • Antibody fragments optimized for specific applications (imaging, circulating protein detection)

  • Liquid biopsy innovations:

    • Ultrasensitive detection of circulating CCDC25 protein using:

      • Digital ELISA platforms (e.g., Simoa technology)

      • Aptamer-based detection systems

      • Mass spectrometry with targeted CCDC25 peptide quantification

    • Exosome isolation and analysis for CCDC25 protein or mRNA content

    • Circulating tumor DNA analysis for CCDC25 gene alterations or methylation patterns

  • Multiplexed detection systems:

    • Multiplex immunoassays combining CCDC25 with established markers (e.g., AFP for HCC)

    • Spatial proteomics platforms for tissue analysis:

      • Imaging mass cytometry

      • Multiplexed ion beam imaging (MIBI)

      • Codex technology

    • Integrated multi-omics approaches combining proteomics, transcriptomics, and epigenomics

  • Point-of-care testing platforms:

    • Microfluidic-based rapid diagnostic devices

    • Paper-based immunochromatographic assays

    • Smartphone-integrated readers for quantitative analysis

    • Portable mass spectrometry for clinical settings

  • Artificial intelligence integration:

    • Machine learning algorithms for:

      • Automated image analysis of CCDC25 immunohistochemistry

      • Pattern recognition in multiplexed data

      • Predictive modeling combining CCDC25 with other biomarkers

      • Treatment response prediction based on CCDC25 status

  • Novel imaging approaches:

    • CCDC25-targeted contrast agents for molecular imaging

    • Intravital microscopy techniques for real-time visualization

    • Intraoperative fluorescence imaging using CCDC25-specific probes

    • Radiolabeled antibodies for PET imaging of CCDC25 expression

The implementation of these technological advancements could significantly improve the sensitivity, specificity, accessibility, and clinical utility of CCDC25-based diagnostic approaches across multiple cancer types.

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