LIFR Antibody, HRP conjugated

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Description

Applications in Research and Diagnostics

This conjugate is primarily used for detecting LIFR expression in:

  • ELISA: Quantitative analysis of LIFR in serum or cell lysates .

  • Western Blotting: Identification of LIFR protein in denaturing conditions .

  • Immunohistochemistry (IHC): Localization of LIFR in tissue sections (though less common due to HRP limitations) .

Example Workflow:

  1. Antigen Capture: LIFR protein binds to immobilized primary antibody.

  2. Signal Amplification: HRP-conjugated secondary antibody binds, oxidizing substrates (e.g., TMB) to generate measurable products .

Recombinant Production (Pichia pastoris)

  • Advantages: Homogeneous conjugates with defined stoichiometry (e.g., 1:2 antibody-to-HRP ratio) .

  • Challenges: Ensuring functional activity of both HRP and antibody domains .

Purification and Validation

ParameterMethod/StandardSource
PurityProtein G affinity chromatography (>95%)
SpecificityELISA, western blot validation
Conjugate StabilitySEC (Size Exclusion Chromatography)

Competitive Binding Assays

In studies using HRP-conjugated goat anti-human IgG, antibodies like 1G11 blocked LIF binding to LIFR but not gp130, confirming receptor-specific interactions .

Immunization Studies

  • Antibody Titers: Serum antibodies against LIFR achieved titers up to 1:3,200 in ELISA, validating epitope recognition .

  • Cell-Based Detection: LIFR antibodies interacted with cell-derived proteins, enabling functional assays .

Signal Amplification

Recombinant HRP-Fab conjugates demonstrated enhanced sensitivity in ELISA due to reduced steric hindrance compared to whole antibodies .

Comparative Analysis of Detection Methods

MethodSensitivityEquipment RequiredTypical Use Case
ELISAHigh (chemiluminescent substrates)Plate readerQuantitative LIFR analysis
Western BlotModerateImaging systemProtein size confirmation

Challenges and Future Directions

  • Cross-Reactivity: Polyclonal antibodies may bind non-specific epitopes .

  • Recombinant Innovations: Engineered HRP-antibody fusions (e.g., Fab fragments) improve signal-to-noise ratios .

Product Specs

Buffer
Preservative: 0.03% ProClin 300; Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Form
Liquid
Lead Time
Product dispatch occurs within 1-3 business days of order receipt. Delivery times may vary depending on the purchasing method and location. Please contact your local distributor for precise delivery estimates.
Synonyms
CD118 antibody; CD118 antigen antibody; FLJ98106 antibody; FLJ99923 antibody; Leukemia inhibitory factor receptor alpha antibody; Leukemia inhibitory factor receptor antibody; LIF R antibody; LIF receptor antibody; LIF-R antibody; Lifr antibody; LIFR_HUMAN antibody; SJS2 antibody; STWS antibody; SWS antibody
Target Names
Uniprot No.

Target Background

Function
LIFR is a signal-transducing molecule potentially sharing a common pathway with IL6ST. Its soluble form inhibits LIF's biological activity by blocking receptor binding on target cells.
Gene References Into Functions

The Leukemia Inhibitory Factor Receptor (LIFR) plays a multifaceted role in various biological processes, as evidenced by the following research findings:

  • Angiogenesis in Colorectal Cancer: High LIFR levels in colorectal cancer promote endothelial cell proliferation and migration, increasing angiogenesis. This effect is partly mediated by IL-8. (PMID: 29751081)
  • Adipogenesis Regulation: miR-377-3p suppresses adipogenesis in human bone marrow mesenchymal stem cells by targeting LIFR, revealing a novel mechanism of miRNA-mediated cellular differentiation. (PMID: 29959592)
  • Association with Preeclampsia: High LIFR expression is associated with preeclampsia. (PMID: 29363569)
  • Tumor Metastasis Suppression: LIFR attenuates tumor metastasis by suppressing YAP expression, suggesting its potential as a therapeutic target in clear cell renal cell carcinoma. (PMID: 29902078)
  • Metastasis Regulation by lncRNA: The lncRNA CTD-2108O9.1 represses metastasis by targeting LIFR. (PMID: 29603493)
  • Adenomyosis and Implantation: Reduced LIFR expression and subsequent signaling pathway activation suggest a mechanism by which LIF may affect the endometrium in patients with adenomyosis. (PMID: 27903796)
  • Pancreatic Cancer Biomarker: LIFR, along with other proteins, exhibits aberrant glycan structures in the sera of pancreatic cancer patients, suggesting its potential as a diagnostic biomarker. (PMID: 28244758)
  • Congenital Anomalies of the Kidney and Urinary Tract (CAKUT): Heterozygous LIFR mutations are found in CAKUT patients, highlighting LIFR's role in urogenital development. (PMID: 28334964)
  • Beta-Catenin Inhibition: LIFR inhibits beta-catenin expression. (PMID: 27375070)
  • RUNX1 Regulation: The LIFR gene is a direct target of RUNX1. (PMID: 26060100)
  • Stuve-Wiedemann Syndrome: LIFR mutations are implicated in Stuve-Wiedemann syndrome. (PMID: 25868946)
  • LIFR Glycosylation and Expression: The C65S mutant LIFR exhibits altered glycosylation and increased expression, potentially due to slower turnover. (PMID: 26285796)
  • Melanoma Progression: High LIFR expression stimulates melanoma cell migration and correlates with poor prognosis. (PMID: 26329521)
  • Adrenal Insufficiency: Stuve-Wiedemann syndrome patients with LIFR (p.Arg692X) mutations may develop adrenal insufficiency due to impaired LIF/LIFR signaling. (PMID: 25145448)
  • Hepatocellular Carcinoma Metastasis: LIFR acts as a metastasis suppressor in hepatocellular carcinoma and serves as a prognostic biomarker. (PMID: 26249360)
  • Hepatocarcinogenesis: LIFR plays a functional role in hepatocarcinogenesis. (PMID: 25749520)
  • Multiple Sclerosis: Increased LIFR expression is observed on immune cells in multiple sclerosis patients. (PMID: 25514345)
  • miR-155 Inhibition: The LIFRalpha-CT3 TAT fusion protein inhibits miR-155 expression. (PMID: 25092123)
  • JAK/STAT3 Signaling: LIFR signaling typically follows the JAK/STAT3 pathway, initiated by various interleukin-6-type cytokines. (PMID: 24618404)
  • CNTF Receptor Signaling: A R28E mutation in CNTF affects receptor signaling pathways. (PMID: 24802752)
  • Colorectal Cancer Biomarker: LIFR rs3729740 and ANXA11 rs1049550 may serve as biomarkers for predicting sensitivity to targeted therapies in metastatic colorectal cancer. (PMID: 23579219)
  • Herpes Simplex Encephalitis: CD118 deficiency (related to LIFR) may be associated with acute ventricle enlargement in a subset of herpes simplex encephalitis patients. (PMID: 23382563)
  • Breast Cancer Tumor Suppression: LIFR functions as a tumor suppressor in breast cancer. (PMID: 22535017)
  • Metastasis Suppression via Hippo-YAP Pathway: LIFR is a metastasis suppressor acting through the Hippo-YAP pathway and possesses prognostic value. (PMID: 23001183)
  • Oncostatin M Binding: A unique loop structure in oncostatin M dictates its binding affinity to its receptor and LIFR. (PMID: 22829597)
  • Schizophrenia: LIFR gene polymorphisms show association with schizophrenia and persecutory delusions. (PMID: 21971603)
  • Endometrial Expression: LIF and LIFR are localized to decidual cells in the endometrium. (PMID: 21966484)
  • Colon Cancer Inactivation: Decreased LIFR expression is a common inactivation event in colon cancer development. (PMID: 21617854)
  • Hepatocellular Carcinoma: Downregulation of LIFR is associated with hepatocellular carcinoma. (PMID: 19733004)
  • Schizophrenia and Working Memory: A LIF gene variant may contribute to hebephrenic schizophrenia and impaired working memory. (PMID: 19879916)
  • LIF-R Gene and Protein Function: Review of LIF-R gene and protein structure, function, mRNA processing, and role in tumor cells. (PMID: 11042511)
  • LIF Receptor Complex: The upper cytokine-binding module and Ig-like domain of LIFR are essential for a functional LIF receptor complex. (PMID: 11812136)
  • Glycoprotein 190 (gp190): Separate functions for the two modules of the membrane-proximal cytokine binding domain of gp190 in ligand binding and receptor activation. (PMID: 11834739)
  • CNTFR interactions: In vitro interactions of CNTFR with LIFR and gp130. (PMID: 12707266)
  • LIFR Mutations and mRNA Stability: Mutations affecting LIFR mRNA stability, leading to protein absence and impaired JAK/STAT3 signaling. (PMID: 14740318)
  • Primordial Follicle Growth: LIF and its receptor may be involved in the growth initiation of human primordial follicles. (PMID: 15044601)
  • Ciliary Neurotrophic Factor Signaling: Deletion of the N-terminal cytokine binding domain in a LIFR mutant abolishes ciliary neurotrophic factor signaling. (PMID: 16051226)
  • Embryonic Stem Cell Differentiation: LIF and LIFR expression increases during human embryonic stem cell differentiation. (PMID: 16949591)
  • Soluble Oncostatin M Receptor (sOSMR): sOSMR neutralizes OSM and interleukin-31 properties. (PMID: 17028186)
  • Quaternary Cytokine Receptor Complex: Biophysical and structural characterization of a quaternary cytokine receptor complex involving gp130, LIF-R, CNTF, and CNTF-Ralpha. (PMID: 18775332)
Database Links

HGNC: 6597

OMIM: 151443

KEGG: hsa:3977

STRING: 9606.ENSP00000263409

UniGene: Hs.133421

Involvement In Disease
Stueve-Wiedemann syndrome (STWS)
Protein Families
Type I cytokine receptor family, Type 2 subfamily
Subcellular Location
[Isoform 1]: Cell membrane; Single-pass type I membrane protein.; [Isoform 2]: Secreted.

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