The CDC37L1 antibody is designed to detect Cell Division Cycle 37 Like 1 (CDC37L1), a co-chaperone protein that facilitates interactions between heat shock proteins (e.g., HSP90) and client kinases or other signaling molecules . This antibody is widely used in techniques such as:
Western blotting
Immunohistochemistry (IHC)
Immunoprecipitation
Flow cytometry
Gastric Cancer:
Low CDC37L1 expression correlates with advanced tumor stage (Stage 4) and poor prognosis .
Silencing CDC37L1 increases CDK6 levels, driving cell cycle progression (S-phase entry) and metastasis .
The CDK4/6 inhibitor Palbociclib reverses CDC37L1 knockdown effects, confirming CDC37L1-CDK6 axis relevance .
Hepatocellular Carcinoma:
| Supplier | Product Code | Host Species | Applications Validated | Key Features |
|---|---|---|---|---|
| Proteintech | 16293-1-AP | Rabbit | WB, IHC, IP | Used in gastric cancer studies |
| Thermo Fisher | PA5-31427 | Rabbit | WB, IF | Targets human CDC37L1 C-terminus |
| Sino Biological | 101590-T08 | Rabbit | WB, ELISA | High specificity for HSP90 interaction studies |
| Atlas Antibodies | HPA021175 | Rabbit | IHC (liver tissue) | Validated in hepatocyte staining |
Cross-Reactivity: Most antibodies are validated for human CDC37L1, with limited data on murine homologs .
Sample Preparation: Optimal results require fresh/frozen tissues or RIPA buffer-extracted proteins to preserve epitope integrity .
Dilution Range: Typical working dilutions are 1:100–1:500 for IHC and 1:1,000–1:2,000 for WB .
CDC37L1’s dual role—tumor suppressor in gastric cancer vs. therapy resistance promoter in HCC—highlights context-dependent functionality. Targeting CDC37L1 or its partners (e.g., CDK6, PPIA) could offer therapeutic avenues, though further in vivo validation is needed .
CDC37L1 antibodies used in research typically possess several important characteristics:
Molecular specificity: They target the Cell Division Cycle 37 Like 1 protein, which has an observed molecular weight of approximately 39 kDa (calculated MW: 38 kDa) .
Format and reactivity: Available antibodies may be polyclonal or monoclonal, with many showing reactivity to human and mouse CDC37L1 proteins .
Applications: Most validated CDC37L1 antibodies are tested for Western blot (WB) applications, with recommended dilutions typically ranging from 1/500 to 1/2000 .
Storage requirements: CDC37L1 antibodies are generally stored as aliquots at -20°C, with recommendations to avoid repeated freeze/thaw cycles to maintain efficacy .
When selecting a CDC37L1 antibody for research, it's essential to verify the antibody's reactivity to your species of interest and its validation for your intended experimental application.
Assessment of CDC37L1 expression in tissue samples primarily employs immunohistochemical (IHC) staining. The methodology involves:
Tissue preparation: Using tissue microarrays containing cancer specimens and corresponding patient pathological information. For example, studies have used microarrays containing 75 pairs of human gastric cancer specimens .
Staining protocol: Following standard immunohistochemical procedures with CDC37L1-specific antibodies (typically at 1:100 dilution) .
Evaluation criteria: Expression levels are evaluated by qualified pathologists based on:
Number of positively stained cells
Staining intensity (classified as weak, moderate, or strong)
Correlation with clinicopathological features
Analysis approach: Results are often analyzed alongside clinical data to establish relationships between CDC37L1 expression and parameters such as histological grade, cancer stage, and patient survival .
This methodological approach allows researchers to reliably assess CDC37L1 expression patterns across different tissue samples and correlate findings with clinical outcomes.
When using CDC37L1 antibodies for Western blotting, researchers should consider the following optimized protocol:
Sample preparation:
Antibody dilution and incubation:
Validation controls:
Troubleshooting considerations:
If background is high, increase blocking time or adjust antibody dilution
For weak signals, extend exposure time or consider using enhanced chemiluminescence substrates
Always validate new lots of antibodies against known positive controls
For optimal results, researchers should determine the ideal antibody concentration for their specific experimental conditions through titration experiments.
Functional studies of CDC37L1 can be efficiently performed through overexpression and knockdown experiments following these methodological approaches:
Overexpression methods:
Lentiviral transduction: Utilize LV-CDC37L1 lentiviral particles for stable overexpression, with LV-NC (negative control) as comparison
Plasmid transfection: Transiently transfect CDC37L1 expression plasmids into target cells using lipofection-based methods
Selection: Establish stable cell lines using puromycin selection after lentivirus transduction
Knockdown strategies:
Functional readouts to assess CDC37L1 activity:
Mechanistic investigations:
These comprehensive approaches allow researchers to thoroughly investigate CDC37L1's biological functions in cancer cell models and validate findings across multiple experimental systems.
When designing immunohistochemistry (IHC) experiments using CDC37L1 antibodies, researchers should consider these critical factors:
Tissue preparation and processing:
Fixation: Standardize fixation protocols (typically 10% neutral buffered formalin for 24-48 hours)
Sectioning: 4-5 μm thick sections on positively charged slides
Antigen retrieval: Optimize conditions (typically heat-induced epitope retrieval in citrate buffer pH 6.0 or EDTA buffer pH 9.0)
Antibody validation and controls:
Positive tissue controls: Include gastric cancer tissues with known CDC37L1 expression
Negative controls: Omit primary antibody on duplicate sections
Specificity controls: Pre-absorption with immunizing peptide or using tissues from knockout models
Staining protocol optimization:
Scoring and interpretation standards:
Correlation with clinical parameters:
By carefully addressing these considerations, researchers can generate reliable and reproducible IHC data regarding CDC37L1 expression in tissue samples.
CDC37L1's interaction with the CDK6 pathway represents a key mechanism in cancer cell regulation. Research has revealed the following important aspects of this relationship:
Molecular mechanism of interaction:
Western blot analysis of cancer signaling pathway factors shows that CDK6 protein levels are distinctly elevated after CDC37L1 blockade, while other proteins (including CDK4, Cyclin D1, FAK, PI3K-P110, and mTOR) remain unchanged
CDC37L1 overexpression leads to down-regulation of CDK6 protein levels, suggesting a specific negative regulatory relationship
This interaction appears to be selective for CDK6 among the tested cell cycle regulators
Functional consequences of the CDC37L1-CDK6 axis:
Pharmacological validation:
Treatment with Palbociclib (a specific CDK4/6 inhibitor) blocks the rapid growth phenotype of gastric cancer cells induced by CDC37L1 silencing
In colony formation assays, while CDC37L1 silencing increases colony numbers, this effect is abolished when combined with Palbociclib treatment
Flow cytometry analysis shows CDC37L1 knockdown leads to increased cells in S phase, which can be hindered by Palbociclib treatment
Cell cycle implications:
These findings establish CDK6 as a downstream effector of CDC37L1 in gastric cancer, providing important insights into potential therapeutic approaches targeting this pathway.
Detecting low levels of CDC37L1 in high-grade tumor samples presents several technical challenges that researchers must address:
Addressing these challenges requires rigorous methodological approaches and careful validation to ensure accurate assessment of CDC37L1 expression in high-grade tumors.
Distinguishing between CDC37L1 and its homolog CDC37 is crucial for accurate experimental interpretation. Researchers can employ these methodological approaches:
Antibody-based discrimination:
Use highly specific antibodies raised against unique epitopes of each protein
Validate antibody specificity through:
Western blotting of recombinant proteins
Testing in knockout/knockdown systems
Peptide competition assays with immunizing peptides
Expression pattern analysis:
Molecular techniques for specific detection:
Design PCR primers targeting unique regions of each transcript
Develop specific siRNAs/shRNAs that selectively target each homolog
Use CRISPR-Cas9 gene editing with guide RNAs designed for unique genomic regions
Co-immunoprecipitation analysis:
Functional discrimination:
By implementing these approaches, researchers can effectively distinguish between these homologous proteins and accurately attribute observed biological effects to the correct protein.
Researchers frequently encounter several pitfalls when working with CDC37L1 antibodies. Here are the most common issues and their solutions:
Cross-reactivity with CDC37:
Problem: CDC37L1 shares structural similarity with CDC37, potentially causing antibody cross-reactivity
Solution:
Use antibodies raised against unique epitopes of CDC37L1
Always validate with positive and negative controls
Perform pre-absorption tests with recombinant proteins
Inconsistent Western blot results:
Problem: Variable band intensity or multiple bands appearing at unexpected molecular weights
Solution:
Weak immunohistochemical staining:
Inconsistent functional outcomes:
Problem: Variable results in overexpression/knockdown experiments
Solution:
Difficulties detecting low levels of CDC37L1:
Problem: CDC37L1 may be expressed at low levels in some tissues
Solution:
Use sensitive detection methods like chemiluminescence for Western blot
Consider qPCR for transcript-level quantification
Implement immunoprecipitation to concentrate the protein before detection
By anticipating these common pitfalls and implementing the suggested solutions, researchers can significantly improve the reliability and reproducibility of their CDC37L1 antibody-based experiments.
Optimizing CDC37L1 antibody conditions across different experimental systems requires systematic approach tailored to each technique:
Western Blotting Optimization:
Immunohistochemistry Optimization:
Immunofluorescence Optimization:
| Parameter | Initial Conditions | Optimization Strategy |
|---|---|---|
| Fixation | 4% PFA, 10 min | Test different fixation times (5-20 min) |
| Permeabilization | 0.1% Triton X-100 | Compare with 0.2% Triton or methanol permeabilization |
| Antibody Dilution | 1:100 | Test series (1:50, 1:100, 1:200) |
| Blocking | 5% normal serum | Test different blocking agents (BSA, serum, commercial blockers) |
| Mounting Media | Standard | Use anti-fade mounting media for sensitive detection |
General Optimization Principles:
Always include appropriate positive controls (gastric cancer cell lines like BGC-823)
Validate antibody specificity using CDC37L1 knockdown/overexpression systems
Run pilot experiments with a range of conditions before larger experiments
Document all optimization steps methodically for reproducibility
Consider cell/tissue-specific factors that may affect antibody binding
By systematically testing these parameters and carefully documenting outcomes, researchers can establish optimal conditions for CDC37L1 antibody use across different experimental platforms.
Quantifying CDC37L1 expression changes during tumor progression requires robust methodological approaches to ensure accuracy and reproducibility. Here are the most effective strategies:
Immunohistochemical quantification in tissue samples:
Semi-quantitative scoring systems:
Digital pathology approaches:
Use image analysis software for unbiased quantification
Segment tissue compartments (tumor vs. stroma) for precise measurement
Standardize image acquisition parameters across all samples
Protein quantification methods:
Western blot densitometry:
Normalize CDC37L1 band intensity to loading controls (β-actin, GAPDH)
Use standard curves with recombinant CDC37L1 for absolute quantification
Include internal controls across blots for cross-experiment normalization
ELISA-based quantification:
Develop sandwich ELISA for CDC37L1 quantification in lysates/serum
Include standard curves with recombinant protein
Validate assay specificity using knockdown/overexpression samples
Transcript-level quantification:
RT-qPCR analysis:
Design primers specific to CDC37L1 (not cross-reactive with CDC37)
Use multiple reference genes for accurate normalization
Implement absolute quantification with standard curves when possible
RNA-seq approaches:
Normalize expression using established methods (FPKM, TPM)
Correlate with other markers of tumor progression
Validate key findings with RT-qPCR
Multi-parameter approaches:
Correlation with clinical staging:
Multivariate analysis:
Integrate CDC37L1 expression with other prognostic markers
Use machine learning approaches for pattern recognition
Develop predictive models incorporating CDC37L1 status
Longitudinal assessment:
Patient follow-up studies:
Compare CDC37L1 expression at diagnosis and disease progression
Correlate changes with treatment response
Analyze expression in treatment-resistant vs. responsive tumors
These comprehensive approaches provide researchers with multiple complementary methods to accurately quantify CDC37L1 expression changes throughout tumor progression, enabling robust correlations with clinical outcomes.
While CDC37L1's tumor-suppressive role has been well-documented in gastric cancer, several promising research avenues exist for exploring its functions in other contexts:
Extension to other cancer types:
Hepatocellular carcinoma (HCC): Previous studies indicate that CDC37L1 mRNA expression is lower in HCC tissues than in non-cancerous liver tissues, with higher expression correlating with better outcomes
Systematic pan-cancer analysis: Comprehensive examination of CDC37L1 expression across multiple cancer types using data from TCGA and other large-scale genomic databases
Hematological malignancies: Investigation of CDC37L1's potential role in leukemias and lymphomas where cell cycle regulators are frequently dysregulated
Mechanistic studies beyond CDK6 regulation:
HSP90 chaperone network: Explore CDC37L1's role in potentially modulating HSP90 function
Kinome regulation: Comprehensive analysis of CDC37L1's interaction with various protein kinases beyond CDK6
Post-translational modifications: Investigation of how phosphorylation, ubiquitination, or other modifications affect CDC37L1 function
Therapeutic potential:
CDC37L1 restoration approaches: Development of methods to restore CDC37L1 expression in tumors where it is downregulated
Combination therapy: Investigation of synergistic effects between CDC37L1 restoration and CDK4/6 inhibitors like Palbociclib
Biomarker development: Evaluation of CDC37L1 as a prognostic or predictive biomarker in various cancer types
Developmental and physiological roles:
Normal tissue homeostasis: Characterization of CDC37L1's functions in normal tissue maintenance and regeneration
Embryonic development: Investigation of its potential roles during development using knockout models
Aging processes: Exploration of CDC37L1's potential involvement in cellular senescence and aging-related pathways
Structural and biochemical characterization:
Protein-protein interaction mapping: Comprehensive identification of CDC37L1 binding partners using proteomics approaches
Structural biology: Determination of CDC37L1's three-dimensional structure and how it differs from CDC37
Allosteric regulation: Investigation of how CDC37L1 conformation affects its function and interactions
These research directions offer significant potential for expanding our understanding of CDC37L1 beyond its established role in gastric cancer and may unveil novel therapeutic strategies for various diseases.
Comparative studies between CDC37 and its homolog CDC37L1 could significantly advance cancer treatment strategies through several key research approaches:
Differential regulation of kinome networks:
Comparative interactome mapping: Identify unique and overlapping kinase clients between CDC37 and CDC37L1
Functional outcomes: While CDC37 typically promotes cancer progression, CDC37L1 appears to have tumor-suppressive properties
Therapeutic implication: Targeting CDC37 while preserving/enhancing CDC37L1 function could provide selective anti-cancer effects
Structural and mechanistic comparisons:
Binding domain analysis: Determine structural differences that explain their opposing functions
Chaperone activity comparison: Assess how each protein interacts with HSP90 and client proteins
Therapeutic opportunity: Design molecules that selectively inhibit CDC37 without affecting CDC37L1, potentially with fewer side effects
Expression pattern analysis across cancers:
CDC37/CDC37L1 ratio: Examine if the relative expression ratio correlates with cancer aggressiveness
Prognostic value: Determine if combined assessment provides better prognostic information than either alone
Patient stratification: Use expression patterns to identify patient subgroups likely to respond to specific treatments
Combinatorial therapeutic approaches:
Resistance mechanism understanding:
Compensatory regulation: Determine if inhibiting one protein leads to compensatory changes in the other
Resistance pathways: Identify escape mechanisms when targeting either protein
Sequential therapy: Develop treatment sequences that anticipate and prevent resistance development
This comparative approach offers significant promise for developing more nuanced and effective cancer treatment strategies by leveraging the opposing functions of these structurally related proteins.
The exploration of CDC37L1 using antibody-based approaches has revealed several crucial insights for cancer research:
Tumor suppressor function: Unlike its homolog CDC37, CDC37L1 functions as a tumor suppressor, particularly in gastric cancer. Lower expression of CDC37L1 is associated with higher tumor grades, advanced cancer stages, and poorer patient survival outcomes .
Mechanistic insights: CDC37L1 exerts its tumor-suppressive effects by negatively regulating CDK6 expression, thereby inhibiting cell proliferation and migration. This mechanism has been validated through multiple experimental approaches including overexpression, knockdown, and pharmacological inhibition studies .
Translational potential: The association between low CDC37L1 expression and poor prognosis suggests its potential utility as a prognostic biomarker. Additionally, the finding that Palbociclib (a CDK4/6 inhibitor) can block the growth-promoting effects of CDC37L1 silencing points to potential therapeutic strategies .
Technical considerations: Reliable detection of CDC37L1 requires careful optimization of antibody conditions and validation using appropriate controls. Researchers must be particularly attentive to specificity issues given the structural similarity between CDC37L1 and CDC37 .
Research applications: CDC37L1 antibodies have proven valuable across multiple experimental platforms including Western blotting, immunohistochemistry, and functional studies, enabling comprehensive characterization of its role in cancer biology .
These insights collectively highlight the importance of CDC37L1 as a significant player in cancer biology and underscore the value of high-quality antibody-based approaches in advancing our understanding of its functions.
This comprehensive methodology reference table provides researchers with standardized protocols and key parameters for conducting reliable CDC37L1 research across various experimental platforms.
Validation of new CDC37L1 antibodies is critical for ensuring experimental reliability. Researchers should follow this comprehensive validation workflow:
Initial specificity assessment:
Cellular validation:
Knockdown/knockout verification:
Overexpression validation:
Application-specific validation:
For Western blotting:
For immunohistochemistry:
Optimize fixation and antigen retrieval conditions
Validate staining pattern in known positive tissues
Compare with established markers or orthogonal techniques
Cross-platform confirmation:
Orthogonal method comparison:
Correlate protein detection with mRNA expression
Compare results across different detection methods
Confirm consistency between different antibody-based techniques
Documentation and reporting standards:
Comprehensive antibody reporting:
Functional correlation:
By systematically implementing this validation workflow, researchers can ensure that new CDC37L1 antibodies provide reliable and reproducible results across different experimental applications.
Understanding the role of CDC37L1 in cancer biology requires familiarity with key publications that have established its functions and mechanisms. The following research publications represent significant contributions to our understanding of CDC37L1:
Foundational studies on CDC37L1 structure and function:
Wang X, et al. (2015). "Structural and functional characterization of CDC37L1 and its comparison to CDC37." Molecular analysis identifying the structural similarities and functional differences between CDC37L1 and CDC37.
CDC37L1 in gastric cancer:
CDC37L1 in hepatocellular carcinoma:
Mechanistic studies on CDC37L1 and HSP90 function:
Clinical correlation studies:
These publications collectively provide a strong foundation for understanding CDC37L1's role in cancer biology and offer important insights for researchers seeking to explore this protein's functions further.
Researchers investigating CDC37L1 can access reliable resources through the following channels:
Antibody and reagent sources:
Commercial suppliers: Companies like Abbexa provide validated CDC37L1 antibodies with detailed specifications for research applications
Academic repositories: Consider resources like Addgene for plasmids and ATCC for validated cell lines expressing or lacking CDC37L1
Public biobanks: Access to tissue microarrays with annotated clinical samples, similar to those used in published studies (e.g., HStmA150CS02 from Outdo Biotech)
Protocol repositories and methodological resources:
Published protocols: Detailed methods from key publications on CDC37L1, including lentiviral transduction procedures for overexpression and knockdown
Online protocol repositories: Resources like Bio-protocol or Protocol Exchange for peer-reviewed experimental procedures
Research groups: Consider contacting laboratories with established expertise in CDC37L1 research for collaboration or advice
Genomic and proteomic databases:
Bioinformatic tools and resources:
Research community networks:
Specialized conferences: Cancer biology and molecular chaperone meetings where CDC37L1 research is presented
Online research communities: Platforms like Research Gate for connecting with experts in the field
Collaborative research consortia: Consider joining or following cancer research networks with interest in molecular chaperones