SPC24 Antibody

What is the functional significance of SPC24 in cellular processes?

SPC24 acts as a component of the essential kinetochore-associated NDC80 complex, which is required for chromosome segregation and spindle checkpoint activity. It is specifically required for kinetochore integrity and the organization of stable microtubule binding sites in the outer plate of the kinetochore. The NDC80 complex, which includes SPC24, synergistically enhances the affinity of the SKA1 complex for microtubules and may allow the NDC80 complex to track depolymerizing microtubules . Research has shown that SPC24 interacts with Ndc80p and Spc25p proteins, based on co-purification studies . Understanding these interactions is fundamental for research into mitotic processes and chromosome stability mechanisms.

What are the optimal applications for SPC24 antibodies in experimental protocols?

Based on validated research applications, SPC24 antibodies are most commonly used in:

For optimal results in Western blotting, researchers should start with a 1:1000 dilution and adjust as needed based on signal strength and background levels. Experimental validation suggests that SPC24 antibody (ab157184) at 1/1000 dilution successfully detects the protein in multiple cell lysates including 293T, MOLT4, TF1, HeLa, and human thymus tissue .

How should researchers address species reactivity considerations when selecting SPC24 antibodies?

Species reactivity is a critical consideration for experimental design. Current commercially available SPC24 antibodies demonstrate reactivity with:

For cross-species studies, researchers should prioritize antibodies with validated reactivity across their species of interest. While sequence homology may suggest potential cross-reactivity with other species, empirical validation is essential before extending applications to non-validated species. For studies involving model organisms beyond human and mouse, preliminary validation experiments should be conducted to confirm reactivity.

What are the optimal protocols for SPC24 detection in cancer tissue samples?

Research on SPC24's role in various cancers requires optimized immunohistochemistry protocols. For prostate cancer and laryngeal squamous cell carcinoma (LSCC) samples, the following methodology has been validated:

• Slice paraffin-embedded tissues to 3 μm thickness

• Dewax with xylene and ethanol

• Heat in antigen recovery solution (EDTA)

• Block endogenous peroxidase activity with normal goat serum

• Incubate with primary antibody (anti-SPC24, e.g., Novus NBP2-47264, 1:50) overnight at 4°C

• Treat with HRP-conjugated secondary antibody

• Reveal positive reactions with DAB solution

• Counterstain with hematoxylin

• Dehydrate and seal with neutral resin

This approach has successfully demonstrated increased SPC24 expression in prostate cancer and LSCC tissues compared to adjacent non-neoplastic tissues. Studies using this protocol have revealed that high SPC24 expression correlates with negative outcomes in prostate cancer patients (P<0.05) , suggesting its potential as a biomarker.

How can researchers validate SPC24 antibody specificity for experimental applications?

Validating antibody specificity is crucial for reliable research outcomes. A comprehensive validation approach for SPC24 antibodies should include:

• Knockout/Knockdown Controls:

  • Utilize SPC24 knockdown/knockout cell lines as negative controls

  • Compare expression patterns between wild-type and KO/KD samples by Western blot

  • Published studies have successfully used this approach for SPC24 antibody validation

• Multiple Antibody Comparison:

  • Test different antibody clones targeting distinct epitopes of SPC24

  • Compare staining patterns between monoclonal (e.g., ab169786, ab157184) and polyclonal (e.g., 26268-1-AP) antibodies

  • Consistent staining patterns across different antibodies increase confidence in specificity

• Immunoprecipitation Validation:

  • Perform IP followed by Western blot detection

  • Confirm specific band at the predicted molecular weight (22-26 kDa)

  • Utilize appropriate negative controls (e.g., non-specific IgG)

• Peptide Competition Assay:

  • Pre-incubate antibody with the immunizing peptide

  • Observe elimination of specific signal in Western blot or immunostaining

What methodological approaches are effective for studying SPC24's role in the kinetochore complex?

For investigating SPC24's function within the NDC80 kinetochore complex, researchers should consider these specialized approaches:

• Co-immunoprecipitation of NDC80 Complex Components:

  • Use anti-SPC24 antibodies (e.g., ab169786) for IP at 1/10 dilution

  • Detect co-precipitated proteins (Ndc80p, Nuf2, SPC25) by Western blot

  • This approach has confirmed interactions between SPC24 and other components of the NDC80 complex

• Conditional Lethal Mutant Analysis:

  • In yeast models, utilize conditional lethal SPC24 mutants (e.g., spc24-2, spc24-3)

  • Analyze phenotypes at restrictive temperatures

  • Evaluate effects on chromosome segregation and spindle checkpoint activity

• High-resolution Imaging:

  • Perform immunofluorescence with anti-SPC24 antibodies (e.g., ab157184)

  • Co-stain with other kinetochore markers

  • Use confocal or super-resolution microscopy to analyze kinetochore structure

• Genetic Interaction Studies:

  • Test for synthetic lethality with other kinetochore genes

  • Evaluate high-copy suppression with NDC80, NUF2, SPC25, and other related genes

  • This approach has revealed functional relationships between SPC24 and other kinetochore components

How should researchers design experiments to evaluate SPC24 as a diagnostic biomarker?

Studies have identified SPC24 as a potential biomarker for several cancer types. A comprehensive experimental approach should include:

What methodology should be used to investigate the mechanistic role of SPC24 in cancer progression?

To elucidate SPC24's role in cancer development and progression, researchers should implement these approaches:

• Pathway Analysis:

  • Conduct Gene Ontology (GO) and pathway enrichment analyses

  • Identify biological processes associated with SPC24 expression

  • Research has linked SPC24 to cell cycle regulation and mitotic processes

• Protein Interaction Studies:

  • Investigate interactions between SPC24 and other cancer-related proteins

  • Focus on partners like NDC80 and BUB1, which have been linked to SPC24 in prostate cancer development

  • Use co-immunoprecipitation with anti-SPC24 antibodies followed by mass spectrometry

• Functional Studies:

  • Perform SPC24 knockdown/overexpression in cancer cell lines

  • Evaluate effects on:

    • Cell proliferation

    • Migration and invasion

    • Apoptosis resistance

    • Drug sensitivity

  • Published research indicates SPC24 regulates breast cancer progression via the PI3K/AKT signaling pathway

• In Vivo Models:

  • Generate xenograft models with SPC24-modulated cancer cells

  • Assess tumor growth, metastasis, and response to therapies

  • Analyze SPC24 expression in tumors using immunohistochemistry

What are the optimal storage and handling protocols for maintaining SPC24 antibody activity?

Proper storage and handling are critical for maintaining antibody performance:

Most SPC24 antibodies are supplied in PBS with 0.02% sodium azide and 50% glycerol at pH 7.3 . This formulation enhances stability during freezing. Researchers should be aware that sodium azide is a hazardous material and take appropriate precautions during handling .

How should researchers troubleshoot inconsistent results with SPC24 antibodies in Western blotting?

When encountering variability in Western blot results, consider these methodological solutions:

• Sample Preparation Optimization:

  • Ensure complete protein denaturation by boiling samples in loading buffer

  • Use fresh protease inhibitors during lysis

  • Validated positive controls include HEK-293T, HeLa, and HepG2 cell lysates

• Antibody Dilution Optimization:

  • Test a range of dilutions (1:500-1:4000 for WB applications)

  • Perform a titration experiment to determine optimal concentration

  • Examples of effective dilutions: ab157184 at 1/1000, 26268-1-AP at 1:1000-1:4000

• Detection Method Considerations:

  • For low abundance proteins, consider using high-sensitivity ECL substrates

  • Optimize exposure time to avoid oversaturation

  • Validate results with secondary antibodies like HRP-conjugated anti-rabbit IgG (1:2000-1:4000)

• Technical Issues Checklist:

  • Verify transfer efficiency with reversible stains

  • Ensure adequate blocking (typically 5% non-fat milk or BSA)

  • Check for proper antibody incubation times (typically overnight at 4°C for primary)

  • Extend washing steps to reduce background

What considerations should be made when using SPC24 antibodies for immunohistochemistry in different tissue types?

Optimizing IHC protocols for different tissues requires careful attention to several variables:

• Antigen Retrieval Methods:

  • For formalin-fixed tissues, EDTA-based antigen retrieval has been validated

  • Optimize pH and heating time based on tissue type

  • Some tissues may require enzymatic retrieval methods

• Tissue-Specific Considerations:

  • Prostate tissues: Anti-SPC24 antibody (ab169786) at 1:250 dilution has been validated

  • Laryngeal tissues: Novus NBP2-47264 at 1:50 dilution has been effective

  • For high-background tissues, increase antibody dilution and extend washing steps

• Signal Amplification Systems:

  • Standard protocols utilize HRP-conjugated secondary antibodies with DAB detection

  • For low expression levels, consider tyramide signal amplification

  • Biotinylated secondary antibodies (1:100) followed by ovalbumin working fluid have shown success

• Controls and Interpretation:

  • Include positive control tissues with known SPC24 expression

  • Use negative controls (omitting primary antibody)

  • Score staining based on intensity and percentage of positive cells

  • Published studies have shown increased SPC24 in cancerous versus adjacent non-cancerous tissues

How can SPC24 antibodies be implemented in multiplexed immunoassays for cancer research?

Advanced multiplexed approaches offer new opportunities for studying SPC24 in complex biological contexts:

• Multiplex Immunofluorescence Strategies:

  • Combine anti-SPC24 antibodies with other cell cycle and kinetochore markers

  • Use species-specific or isotype-specific secondary antibodies with distinct fluorophores

  • Implement sequential staining protocols to avoid cross-reactivity

  • Consider fluorophore-conjugated primary antibodies like SPC24-FITC for direct detection

• Mass Cytometry Applications:

  • Metal-tagged anti-SPC24 antibodies can be used in CyTOF analysis

  • Enables simultaneous detection of dozens of proteins

  • Particularly valuable for single-cell analysis of heterogeneous tumors

• Spatial Transcriptomics Integration:

  • Combine SPC24 immunodetection with spatial transcriptomics

  • Correlate protein expression with mRNA levels at single-cell resolution

  • Map SPC24 expression within the tumor microenvironment

• Liquid Biopsy Development:

  • Explore SPC24 detection in circulating tumor cells

  • Evaluate potential as a non-invasive biomarker

  • Correlate with tissue expression patterns and disease progression

What are the methodological approaches for studying SPC24 post-translational modifications?

Investigation of SPC24 post-translational modifications requires specialized techniques:

• Phosphorylation Analysis:

  • Use phospho-specific antibodies when available

  • Employ phosphatase treatments as controls

  • Implement phosphoproteomic approaches to identify specific modified residues

  • Correlate modifications with cell cycle stages and functional outcomes

• Ubiquitination Studies:

  • Immunoprecipitate SPC24 under denaturing conditions

  • Probe for ubiquitin modifications by Western blot

  • Investigate proteasomal degradation pathways

  • Explore effects on protein stability and turnover

• Other Modifications:

  • Investigate acetylation, methylation, or SUMOylation

  • Use modification-specific antibodies or mass spectrometry

  • Correlate modifications with protein interactions and functions

• Functional Consequences:

  • Generate phosphomimetic or phospho-deficient mutants

  • Evaluate effects on kinetochore assembly and function

  • Assess impact on chromosome segregation and cell cycle progression

How should researchers quantify and interpret SPC24 expression data in comparative studies?

Robust quantification and statistical analysis are essential for meaningful comparisons:

• Western Blot Quantification:

  • Normalize SPC24 signal to loading controls (β-actin recommended)

  • Use digital imaging software (e.g., ImageJ) for densitometry

  • Present data as relative expression compared to controls

  • Perform at least three independent experiments for statistical validity

• IHC Scoring Systems:

  • Implement semi-quantitative scoring based on staining intensity (0-3) and percentage of positive cells

  • Calculate H-scores or Allred scores for standardized reporting

  • Use digital pathology algorithms for unbiased quantification when available

  • Compare staining between tumorous and adjacent non-tumorous tissues

• Statistical Analysis:

  • Apply appropriate statistical tests (t-test, ANOVA, non-parametric alternatives)

  • Set significance threshold (typically p<0.05)

  • For survival analyses, use Kaplan-Meier curves and log-rank tests

  • For diagnostic value, generate ROC curves and calculate AUC, sensitivity, and specificity

• Correlation Analyses:

  • Assess correlations between SPC24 expression and clinical parameters

  • Calculate Pearson's or Spearman's correlation coefficients

  • Perform multivariate analyses to identify independent prognostic factors

  • Studies have shown associations between SPC24 expression and factors like Gleason score and lymph node metastasis in prostate cancer

What bioinformatic approaches should be used to analyze SPC24 expression across cancer datasets?

Computational analysis of SPC24 across multiple datasets requires systematic approaches:

How can researchers integrate SPC24 protein expression data with genomic and transcriptomic analyses?

Multi-omics integration provides comprehensive insights into SPC24's role in cancer:

• Correlation with Copy Number Alterations:

  • Analyze SPC24 gene amplification/deletion across cancer types

  • Correlate copy number with protein expression levels

  • Identify genomic alterations co-occurring with SPC24 changes

• Transcriptional Regulation Analysis:

  • Investigate promoter methylation status

  • Analyze transcription factor binding sites

  • Explore microRNA regulation of SPC24 expression

  • Correlate mRNA and protein levels across samples

• Integrated Data Visualization:

  • Create integrated heatmaps showing genomic, transcriptomic, and proteomic data

  • Implement dimension reduction techniques (PCA, t-SNE) for pattern identification

  • Use circos plots to visualize multi-omics relationships

• Functional Interpretation:

  • Map multi-omics data to biological pathways

  • Identify convergent mechanisms of dysregulation

  • Research has shown SPC24 involvement in cell cycle and mitotic pathways

What experimental validation approaches should follow computational predictions regarding SPC24 function?

Rigorous experimental validation is essential for confirming computational predictions:

• Target Gene Validation:

  • Verify predicted SPC24 interactions using co-immunoprecipitation

  • Confirm co-expression patterns with qPCR and Western blotting

  • Research has validated interactions between SPC24 and components of the NDC80 complex

• Functional Pathway Confirmation:

  • Use pathway inhibitors to test predicted signaling mechanisms

  • Implement CRISPR/Cas9-mediated gene editing for loss-of-function studies

  • Evaluate phenotypic effects consistent with predicted pathways

  • Studies have linked SPC24 to PI3K/AKT signaling in breast cancer progression

• Mechanistic Studies:

  • Design experiments to test specific mechanisms predicted by computational analyses

  • Implement reporter assays to verify transcriptional regulation

  • Use domain-specific mutations to validate protein interaction predictions

• Translational Validation:

  • Test predicted biomarker potential in independent clinical cohorts

  • Evaluate diagnostic, prognostic, or therapeutic applications

  • Research has demonstrated SPC24's potential as a diagnostic biomarker for prostate cancer and LSCC