DLO1 Antibody

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Description

Introduction to DLL1 and DLK1 Antibodies

Antibodies against DLL1 and DLK1 are critical tools for studying Notch signaling pathways and tumor biology. While these proteins share structural similarities as EGF-repeat-containing transmembrane proteins, their roles and antibody applications differ substantially:

FeatureDLL1 AntibodyDLK1 Antibody
Target ProteinDelta-like 1 (Notch ligand)Delta-like 1 homolog (adipocyte differentiation inhibitor)
Molecular Weight82–100 kDa (full-length); 60 kDa (soluble ectodomain fragment) ~41 kDa (mature form)
Key FunctionsActivates Notch signaling, regulates stem cell maintenance, tumor progressionInhibits adipocyte differentiation, acts as tumor suppressor or oncogene
Associated DiseasesBreast cancer, leukemia, cardiovascular disorders Obesity, hepatocellular carcinoma, neuroendocrine tumors

DLL1 (Delta-like 1)

  • Domain Structure:

    • Extracellular: DSL domain + 8 EGF-like repeats

    • Transmembrane: 23 aa

    • Cytoplasmic: 155 aa

  • Proteolytic Processing:

    • Shedding by ADAM9/12/17 releases a 60 kDa soluble fragment .

    • γ-secretase cleavage releases the intracellular domain for nuclear signaling .

DLK1 (Delta-like 1 Homolog)

  • Domain Structure:

    • Extracellular: 6 EGF-like repeats

    • Transmembrane: Single-pass type I

  • Isoforms:

    • Membrane-bound (50–60 kDa) and soluble (25 kDa) forms generated by alternative splicing .

Anti-DLL1 Antibodies in Cancer Therapy

  • Dl1.72 (Novel Anti-DLL1 mAb):

    • Mechanism: Blocks DLL1-Notch interaction, reducing ER+ breast cancer proliferation, mammosphere formation, and angiogenesis .

    • In Vivo Efficacy:

      • Reduced tumor growth by 60% and liver metastases by 75% in xenograft models .

      • No observed toxicity in preclinical trials .

    • Clinical Relevance: Potential for overcoming endocrine therapy resistance in ER+ breast cancer .

ParameterDl1.72 Efficacy (vs. Control)Citation
Tumor Volume↓60%
Metastasis Incidence↓75%
Proliferation (Ki67)↓50%

Anti-DLK1 Antibodies in Metabolic and Cancer Research

  • MAB1144 (Anti-DLK1 mAb):

    • Applications: Detects DLK1 in hepatocellular carcinoma (HepG2) via flow cytometry and Western blot .

    • Functional Role: DLK1 knockdown reduces tumor clonogenicity and enhances adipocyte differentiation .

  • 3A10 (Anti-DLK1 mAb):

    • Specificity: Binds recombinant human DLK1 fragment (Ala24-Pro297) in ELISA, WB, and IF .

DLL1 Antibodies

  • Cancer: Target Notch-driven tumors (e.g., T-cell acute lymphoblastic leukemia) .

  • Cardiovascular Research: Modulate angiogenesis in atherosclerosis models .

DLK1 Antibodies

  • Obesity Studies: DLK1 polymorphisms correlate with childhood obesity .

  • Oncology:

    • Hepatocellular Carcinoma: DLK1 overexpression linked to poor prognosis .

    • Neuroendocrine Tumors: Soluble DLK1 serves as a serum biomarker .

Challenges and Future Directions

  • DLL1 Antibody Limitations:

    • Notch pathway pleiotropy risks off-target effects (e.g., gastrointestinal toxicity) .

  • DLK1 Antibody Opportunities:

    • Dual targeting of membrane-bound and soluble DLK1 isoforms may enhance therapeutic precision .

Product Specs

Buffer
Preservative: 0.03% Proclin 300
Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Form
Liquid
Lead Time
Made-to-order (14-16 weeks)
Synonyms
DLO1 antibody; SAG108 antibody; At4g10500 antibody; F3H7.16 antibody; F7L13.80Protein DMR6-LIKE OXYGENASE 1 antibody; EC 1.14.11.- antibody; 2-oxoglutarate antibody; 2OG)-Fe(II) oxygenase-like protein DLO1 antibody; Protein SENESCENCE-ASSOCIATED GENE 108 antibody; Salicylate 3-hydroxylase DLO1 antibody; S3H DLO1 antibody; SA 3-hydroxylase DLO1 antibody; Salicylic acid 3-hydroxylase DLO1 antibody; EC 1.14.13.- antibody
Target Names
DLO1
Uniprot No.

Target Background

Function
DLO1 Antibody targets DLO1, an enzyme that converts salicylic acid (SA) to both 2,3-dihydroxybenzoic acid (2,3-DHBA) and 2,5-DHBA in vitro, but only 2,3-DHBA in vivo. DLO1 is a component of a negative feedback regulation system that controls SA levels during senescence. It regulates both the onset and progression of leaf senescence. Additionally, DLO1 acts as a negative regulator of defense against the downy mildew pathogen *Hyaloperonospora arabidopsidis*, contributing to plant susceptibility to this microbial infection.
Gene References Into Functions
  1. Research indicates that the gene *At4g10500* encodes a functional salicylic acid 3-hydroxylase (S3H). PMID: 23959884
Database Links

KEGG: ath:AT4G10500

STRING: 3702.AT4G10500.1

UniGene: At.33626

Protein Families
Iron/ascorbate-dependent oxidoreductase family

Q&A

Given the context of "DLO1 Antibody" and the requirements for academic research scenarios, I will provide a collection of FAQs that delve into the scientific aspects of antibody research, focusing on experimental design, data analysis, and methodological approaches. Since specific information on "DLO1 Antibody" is limited, I will generalize these FAQs to cover relevant aspects of antibody research that could apply to any specific antibody, including DLO1.

A:

When designing experiments to study the efficacy of antibodies in cell cultures, researchers typically follow these steps:

  • Cell Line Selection: Choose a cell line that expresses the target antigen for the antibody.

  • Antibody Concentration Optimization: Perform dose-response experiments to determine the optimal concentration of the antibody.

  • Control Groups: Include negative controls (e.g., untreated cells) and positive controls (e.g., cells treated with a known effective antibody).

  • Assessment Methods: Use techniques like ELISA, Western blot, or flow cytometry to measure antibody binding and cellular responses.

A:

To resolve contradictions in antibody efficacy data, researchers:

  • Re-evaluate Experimental Conditions: Check for inconsistencies in experimental setup, reagents, or environmental conditions.

  • Statistical Analysis: Use robust statistical methods to assess significance and variability.

  • Replication: Repeat experiments to confirm findings.

  • Literature Review: Compare results with existing literature to identify potential explanations for discrepancies.

A:

Epitope mapping involves identifying the specific region on an antigen that an antibody binds to. Common methods include:

  • X-ray Crystallography: Provides high-resolution structures of antibody-antigen complexes.

  • Mutagenesis: Systematically alters amino acids in the antigen to assess binding effects.

  • Peptide Arrays: Screens peptides derived from the antigen to identify binding sequences.
    These methods can be applied to DLO1 by first identifying potential epitopes through computational modeling, followed by experimental validation using the above techniques.

A:

To engineer antibodies for improved affinity or specificity, researchers use:

  • Affinity Maturation: Iteratively mutates and selects antibody variants with higher affinity.

  • CDR Loop Engineering: Modifies complementarity-determining regions (CDRs) to enhance specificity.

  • Computational Design: Utilizes computational tools to predict and design optimal antibody structures.

A:

Antibody stability and degradation are influenced by factors such as temperature, pH, and enzymatic activity. To study these aspects:

  • Thermal Stability Assays: Use techniques like differential scanning calorimetry (DSC) to assess thermal stability.

  • Enzymatic Degradation Studies: Expose antibodies to proteases to evaluate resistance to enzymatic cleavage.

  • Formulation Optimization: Test different formulations to enhance stability during storage and use.

A:

Validation involves:

  • Specificity Testing: Uses Western blot, ELISA, or immunohistochemistry to confirm binding specificity.

  • Functional Assays: Assesses biological activity in relevant cell or animal models.

  • Orthogonal Validation: Employs multiple independent methods to confirm findings.

A:

ADCs involve linking an antibody to a cytotoxic drug. To develop ADCs using DLO1:

  • Linker Design: Choose a linker that is stable in circulation but cleaves at the target site.

  • Payload Selection: Select a potent cytotoxic drug that is effective at low concentrations.

  • Conjugation Methods: Use techniques like click chemistry or enzymatic conjugation to attach the drug to the antibody.

A:

Common methods for antibody production include:

  • Hybridoma Technology: Fuses B cells with myeloma cells to create immortal antibody-producing cell lines.

  • Recombinant Expression Systems: Uses mammalian or bacterial cells to express antibodies from cloned genes.

  • Single B Cell Cloning: Isolates and clones individual B cells to produce monoclonal antibodies.

A:

To study interactions between antibodies and immune cells:

  • Flow Cytometry: Assesses antibody binding to immune cells and their activation status.

  • Cell Culture Assays: Evaluates the effects of antibodies on immune cell function and cytokine production.

  • In Vivo Models: Uses animal models to study antibody effects on immune responses in a more physiological context.

A:

To assess stability in biological fluids:

  • Incubation Studies: Exposes antibodies to serum or other biological fluids at different temperatures and times.

  • Enzyme-Linked Immunosorbent Assay (ELISA): Measures antibody activity after incubation.

  • Mass Spectrometry: Analyzes antibody degradation products to understand stability mechanisms.

Data Table Example: Antibody Stability in Biological Fluids

AntibodyIncubation Time (Days)Temperature (°C)Remaining Activity (%)
DLO113790
DLO173770
DLO11495
DLO17485

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