KLF12 Antibody, HRP conjugated

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Description

Overview of KLF12 Antibody, HRP Conjugated

The KLF12 Antibody, HRP conjugated, is a mouse monoclonal antibody (clone PCRP-KLF12-1E3) designed for direct detection of KLF12 in human samples. Key features include:

ParameterDetails
HostMouse
IsotypeIgG1
ConjugateHorseradish Peroxidase (HRP)
ReactivityHuman
ApplicationsFlow Cytometry, Immunofluorescence, Immunoprecipitation, Protein Array
ImmunogenRecombinant full-length human KLF12 protein (Uniprot: Q9Y4X4)
Format0.1 mL
Storage4°C in the dark

This antibody simplifies workflows by eliminating the need for secondary antibodies, making it ideal for high-throughput or rapid detection assays.

Comparative Analysis of KLF12 Antibodies

To contextualize the HRP-conjugated variant, a comparison with other KLF12 antibodies is provided:

Antibody SourceHostIsotypeConjugateApplicationsReactivityImmunogen
Novus Biologicals MouseIgG1HRPFlow Cytometry, IF, IP, Protein ArrayHumanRecombinant full-length KLF12
R&D Systems RabbitPolyclonalNoneImmunocytochemistry, WBHumanSynthetic peptide (aa 1–100)
Abcam RabbitPolyclonalNoneIP, WBHumanSynthetic peptide (aa 1–100)
Proteintech RabbitPolyclonalNoneWB, IHC, ChIPHuman, MouseKLF12 fusion protein

Applications and Validation

The HRP-conjugated antibody is validated for:

  • Flow Cytometry: Direct staining of intracellular KLF12 in fixed/permeabilized cells .

  • Immunofluorescence: Visualization of nuclear KLF12 in HEK293 cells (e.g., R&D Systems’ antibody with secondary detection) .

  • Immunoprecipitation: Enrichment of KLF12 for downstream protein interaction studies .

  • Protein Array: High-throughput screening of KLF12 levels in lysates .

Non-HRP-conjugated antibodies (e.g., Abcam, Proteintech) require secondary antibodies for detection but are widely used in:

  • Western Blot: Detection of KLF12 in Jurkat, 293T, and HeLa cell lysates .

  • Chromatin Immunoprecipitation (ChIP): Identifying KLF12 binding sites (e.g., PD-L1 promoter in NSCLC) .

Research Findings and Case Studies

KLF12 antibodies have been pivotal in elucidating KLF12’s roles in:

Endometrial Decidualization

  • Role: KLF12 inhibits FOXO1 expression, impairing implantation .

  • Methods: Western blot and immunohistochemistry in human endometrial tissues .

Colorectal Cancer (CRC)

  • Role: KLF12 activates EGR1, promoting tumor growth .

  • Methods: ChIP assays confirmed KLF12 binding to the EGR1 promoter .

Cardiac Remodeling

  • Role: KLF12 exacerbates angiotensin II-induced fibrosis via TGF-β/Smad3 signaling .

  • Methods: RNA-seq and Smad7 promoter analysis in murine models .

NSCLC Immunomodulation

  • Role: KLF12 upregulates PD-L1 by recruiting P300 histone acetyltransferase .

  • Methods: ChIP assays and STAT1/STAT3 co-immunoprecipitation .

Strategic Considerations for Researchers

  • HRP-Conjugated Advantage: Streamlined protocols for flow cytometry and protein arrays .

  • Cross-Reactivity: Proteintech’s antibody detects KLF12 in mouse models, useful for preclinical studies .

  • Limitations: Most antibodies are human-specific; murine models may require species-specific reagents .

Product Specs

Buffer
Preservative: 0.03% Proclin 300
Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Form
Liquid
Lead Time
We typically dispatch products within 1-3 business days after receiving your order. Delivery times may vary depending on the purchasing method or location. Please consult your local distributor for specific delivery timeframes.
Synonyms
2700063E05Rik antibody; AI225908 antibody; AI315654 antibody; AP-2 repressor antibody; AP-2rep antibody; AP-2rep transcription factor antibody; AP2REP antibody; B130052C06Rik antibody; D530033K05Rik antibody; HSPC122 antibody; KLF12 antibody; KLF12 zinc finger transcriptional repressor antibody; KLF12_HUMAN antibody; Krueppel like factor 12 antibody; Krueppel-like factor 12 antibody; OTTHUMP00000018503 antibody; Transcriptional repressor AP 2rep antibody; Transcriptional repressor AP-2rep antibody
Target Names
KLF12
Uniprot No.

Target Background

Function
This antibody confers strong transcriptional repression to the AP-2-alpha gene. It binds to a regulatory element (A32) within the AP-2-alpha gene promoter.
Gene References Into Functions
  1. Research has shown that KLF12 is highly expressed in nasopharyngeal carcinoma (NPC) tissues. Overexpression of KLF12 promotes NPC cell proliferation, while silencing KLF12 suppresses it. Additionally, KLF12 has been identified as a direct target for miR-1207 at its 3'-UTR mRNA. PMID: 30243935
  2. Evidence suggests that Kruppel-like factor 12 protein (KLF12) acts as a metastasis-suppressor gene. Loss of KLF12 function is associated with anoikis resistance through the regulation of the cell cycle. PMID: 26455320
  3. KLF12 promotes tumor growth by directly activating early growth response protein 1 (EGR1). The levels of KLF12 and EGR1 show a synergistic correlation with poor prognosis. These findings indicate that KLF12 likely plays a significant role in colorectal cancer and could serve as a potential prognostic marker and therapeutic target. PMID: 27442508
  4. Overexpression of miR-141 enhances anoikis resistance in ovarian cancer cells by targeting and repressing the expression of KLF12. This, in turn, competes for binding sites in the survivin promoter with Sp1. The subsequent increase in survivin then protects ovarian cancer cells against anoikis by blocking intrinsic apoptotic activity. PMID: 28095864
  5. Data demonstrate that Kruppel-like factor 12 (KLF12) hinders endometrial decidualization by transcriptionally repressing Nur77 protein. Overexpression of Nur77 reverses the poor decidual response of endometrial stromal cells (hESCs) in recurrent implantation failure (RIF) patients. PMID: 28359310
  6. SLC29A1 rs760370 and KLF12 rs9543524 SNPs are associated with treatment-induced thrombocytopenia in chronic hepatitis C patients treated with PEGIFN2b/ribavirin/combination. PMID: 26750805
  7. Research findings support that miR-205 is a microRNA specific to basal-like breast carcinoma (BLBC). It functions as a tumor suppressor gene by directly targeting and negatively regulating the proto-oncogene KLF12. Dysregulation of miR-205 is involved in invasion and apoptosis. miR-205 and KLF12 provide a potential diagnostic biomarker and therapeutic approach for BLBC. PMID: 27278159
  8. Overexpression of KLF12 is associated with gastric cancer. PMID: 27468717
  9. Elevated KLF12 expression is accompanied by decreased FOXO1 expression in the endometria of patients with repeated implantation failure. PMID: 26223982
  10. Overexpression of KLF12 in endometrial stromal cells significantly represses the expression and secretion of decidualization biomarker genes and their products decidual prolactin and insulin-like growth factor binding protein-1. PMID: 23458459
  11. The KLF12 rs1324913 A allele homozygous genotype is a potential predictor of Rheumatoid Arthritis. PMID: 22150086
  12. No association of genetic polymorphism with rheumatoid arthritis was found in Spanish and Dutch cohorts. PMID: 21658422
  13. In a large UK cohort of patients with rheumatoid arthritis, results failed to provide additional evidence for association at the KLF12 locus, previously reported to be associated with rheumatoid arthritis in independent Spanish cohorts. PMID: 19907058
  14. KLF12 has been identified as a new susceptibility gene for rheumatoid arthritis. PMID: 18668548
  15. Overexpression of Kruppel-like factor 12 is associated with gastric cancer progression. PMID: 19588488

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Database Links

HGNC: 6346

OMIM: 607531

KEGG: hsa:11278

STRING: 9606.ENSP00000366894

UniGene: Hs.373857

Protein Families
Sp1 C2H2-type zinc-finger protein family
Subcellular Location
Nucleus.

Q&A

What is KLF12 and what are its key biological functions?

KLF12, also known as AP-2rep (AP-2 repressor) or HSPC122, is a member of the Krüppel-like factor family of transcription factors characterized by zinc finger DNA-binding domains. KLF12 functions primarily as a transcriptional repressor that binds to specific regulatory elements in target gene promoters . Its key biological functions include:

  • Strong transcriptional repression of the AP-2-alpha gene by binding to a regulatory element (A32) in the promoter region

  • Negative regulation of endometrial decidualization, a critical process for successful embryo implantation

  • Direct binding to the FOXO1 promoter region and inhibition of FOXO1 expression in human endometrial stromal cells

  • Involvement in the pathogenesis of repeated implantation failure, as evidenced by elevated KLF12 expression accompanied by decreased FOXO1 expression in patients with RIF

  • Impairment of embryo implantation and endometrial decidualization in mouse models, suggesting a crucial role in early pregnancy

The 44 kDa KLF12 protein is primarily localized in the nucleus, consistent with its role as a transcription factor regulating gene expression .

How do I select the appropriate KLF12 antibody for my specific application?

Selecting the right KLF12 antibody depends on your experimental application, target species, and specific requirements. Based on the available data, consider the following factors:

  • Application compatibility: Different antibodies are validated for specific applications. For example:

    • For Western blotting (WB): Multiple KLF12 antibodies including ab129459 and ABIN2855792 are validated

    • For immunoprecipitation (IP): ab129459 has been validated

    • For immunohistochemistry (IHC-P, IHC-F): bs-16783r-HRP is validated

  • Species reactivity: Verify the antibody's reactivity with your species of interest:

    • Human-reactive: All listed antibodies (ab129459, bs-16783r-HRP, ABIN2855792)

    • Mouse-reactive: bs-16783r-HRP and ABIN2855792 (predicted for bs-16783r-HRP)

    • Other species: bs-16783r-HRP has predicted reactivity with rat, dog, sheep, horse, chicken, and rabbit

  • Conjugation: Determine if you need a conjugated antibody:

    • HRP-conjugated (like bs-16783r-HRP): Optimal for direct detection in WB, IHC without secondary antibody

    • Unconjugated (like ab129459): Requires appropriate secondary antibody detection system

  • Antibody format: Consider polyclonal versus monoclonal based on your experimental needs:

    • All KLF12 antibodies in the search results are polyclonal rabbit antibodies

When designing critical experiments, it is advisable to validate antibody performance in your specific experimental system before conducting extensive studies.

What is the significance of HRP conjugation in KLF12 antibodies?

Horseradish peroxidase (HRP) conjugation offers several advantages in immunodetection applications when working with KLF12 antibodies:

  • Direct detection: HRP-conjugated antibodies like bs-16783r-HRP eliminate the need for secondary antibody incubation, simplifying protocols and reducing background signal .

  • Enhanced sensitivity: HRP enzymatic activity provides signal amplification when used with appropriate substrates (luminol-based for chemiluminescence or DAB for colorimetric detection), potentially increasing detection sensitivity of KLF12 even at low expression levels.

  • Time efficiency: Direct conjugation reduces protocol time by eliminating secondary antibody incubation and washing steps, particularly beneficial in time-sensitive experiments.

  • Flexibility in detection methods: HRP-conjugated antibodies are compatible with:

    • Chemiluminescence detection (ECL) as demonstrated in the Western blot data for KLF12 detection in Jurkat, 293T, and HeLa cell lysates

    • Colorimetric detection using 3,3'-diaminobenzidine (DAB) for IHC applications

    • Tyramide signal amplification (TSA) for further enhancement of signal in low-abundance targets

  • Reduced cross-reactivity: Elimination of secondary antibodies reduces potential cross-reactivity issues in multi-labeling experiments.

The bs-16783r-HRP antibody specifically offers these advantages for Western blotting, IHC-P, and IHC-F applications with recommended dilutions of 1:500-2000 for WB and 1:100-500 for IHC applications .

What are the optimal conditions for using KLF12 antibody (HRP conjugated) in Western blotting?

Optimal Western blotting conditions for HRP-conjugated KLF12 antibody require careful consideration of sample preparation, electrophoresis parameters, and detection protocols. Based on the available data, the following recommendations can be made:

Sample preparation:

  • Use whole cell lysates from appropriate cell lines (Jurkat, 293T, HeLa showed successful detection)

  • Load appropriate protein amounts: 15-50 μg per lane appears effective

  • Include proper positive controls (Jurkat cells show good KLF12 expression)

Electrophoresis and transfer conditions:

  • Prepare for detection of the 44 kDa band (predicted molecular weight of KLF12)

  • Use standard SDS-PAGE separation (10% gel is typically suitable for this molecular weight)

  • Employ standard wet or semi-dry transfer protocols

Antibody incubation and detection:

  • For bs-16783r-HRP: Use at a dilution of 1:500-2000 in appropriate blocking buffer

  • For reference, unconjugated ab129459 was effective at 0.1 μg/mL concentration

  • Blocking buffer: TBS with 1% BSA is suitable based on the storage buffer composition

  • Incubation time: Typically overnight at 4°C or 1-2 hours at room temperature

Detection protocol:

  • Use ECL (Enhanced Chemiluminescence) substrates compatible with HRP

  • Expected exposure time: Reference data showed good results with 3-minute exposure

  • The predicted band size for KLF12 is 44 kDa

Buffer composition:

  • Storage buffer for bs-16783r-HRP contains 0.01M TBS (pH 7.4) with 1% BSA, 0.02% Proclin300, and 50% Glycerol

  • This suggests using TBS-based wash and incubation buffers

A representative Western blot protocol based on successful detection of KLF12 would include standard SDS-PAGE, transfer to PVDF or nitrocellulose membrane, blocking in TBS with 5% BSA, incubation with KLF12-HRP antibody (1:1000), washing in TBST, and ECL detection with 1-3 minute exposure time.

How can I optimize KLF12 antibody performance in immunohistochemistry applications?

Optimizing KLF12 antibody performance for immunohistochemistry requires attention to several critical parameters:

Sample preparation and antigen retrieval:

  • Fixation: Standard 10% neutral buffered formalin fixation is suitable

  • Sectioning: 4-6 μm sections are typically appropriate for IHC

  • Antigen retrieval: For paraformaldehyde-fixed tissues, test both:

    • Heat-induced epitope retrieval (HIER) using citrate buffer (pH 6.0)

    • HIER using EDTA buffer (pH 9.0)

Blocking and antibody incubation:

  • Peroxidase blocking: 3% hydrogen peroxide for 10 minutes

  • Protein blocking: 5-10% normal serum (matched to secondary antibody species if using unconjugated primary)

  • Primary antibody dilution:

    • For bs-16783r-HRP, use 1:100-500 dilution for both IHC-P and IHC-F applications

    • Incubation: Overnight at 4°C or 1-2 hours at room temperature

Detection optimization:

  • For HRP-conjugated antibody (bs-16783r-HRP):

    • Direct detection with DAB substrate (typically 5-10 minutes)

    • No secondary antibody required

  • Counterstaining: Hematoxylin for nuclear visualization (important for KLF12 which localizes to the nucleus)

  • Mounting: Use permanent mounting medium for long-term storage

Controls:

  • Positive tissue control: Endometrial tissue samples are appropriate based on KLF12's role in decidualization

  • Negative controls:

    • Primary antibody omission

    • Non-immune IgG at the same concentration as primary antibody

    • Tissues known to lack KLF12 expression

Troubleshooting weak or absent staining:

  • Increase antibody concentration (try 1:100 dilution)

  • Extend primary antibody incubation time (overnight at 4°C)

  • Test alternative antigen retrieval methods

  • Use signal amplification systems compatible with HRP

Troubleshooting high background:

  • Decrease antibody concentration (try 1:500 dilution)

  • Ensure thorough washing steps (3-5 washes, 5 minutes each)

  • Increase blocking time or concentration

  • Test alternative blocking reagents (BSA, casein, commercial blockers)

Based on KLF12's involvement in endometrial function, reproductive tissues provide relevant biological contexts for expression analysis and method optimization .

What troubleshooting approaches should I use when the KLF12 antibody doesn't perform as expected?

When encountering suboptimal performance with KLF12 antibodies, systematic troubleshooting can help identify and resolve issues:

Western Blot Issues:

  • No signal detected:

    • Verify KLF12 expression in your sample (Jurkat cells show good expression)

    • Check antibody dilution (try more concentrated, e.g., 1:500 for HRP-conjugated)

    • Confirm HRP activity by using a dot blot with direct ECL detection

    • Increase protein loading (50 μg of total protein per lane as shown in reference data)

    • Extend exposure time (reference data used 3 minutes)

    • Verify transfer efficiency using reversible protein stain

  • Multiple bands/non-specific binding:

    • Increase blocking time/concentration (use 5% BSA in TBS)

    • Optimize antibody dilution (try more dilute, e.g., 1:2000)

    • Add 0.1-0.5% Tween-20 to antibody dilution buffer

    • Increase wash stringency (more washes, longer duration)

    • Validate with KLF12 knockout/knockdown samples as negative controls

  • Incorrect molecular weight:

    • Expected band size for KLF12 is 44 kDa

    • Post-translational modifications may cause shifts

    • Verify with positive control (Jurkat lysate)

    • Consider using gradient gels for better resolution

IHC Issues:

  • Weak or no staining:

    • Optimize antigen retrieval (test both citrate and EDTA buffers)

    • Reduce dilution (use 1:100 instead of 1:500)

    • Increase incubation time or temperature

    • Check for proper tissue fixation (overfixation can mask epitopes)

    • Verify antibody reactivity with your species (bs-16783r-HRP is confirmed for human, predicted for mouse)

  • High background:

    • Increase antibody dilution (use 1:500 instead of 1:100)

    • Enhance blocking (longer time, different blocking agents)

    • Add 0.1-0.3% Triton X-100 to reduce non-specific binding

    • Ensure thorough washing between steps

Immunoprecipitation Issues:

  • Poor pull-down efficiency:

    • Increase antibody amount (reference data used 6 μg antibody per mg lysate)

    • Optimize lysis buffer composition

    • Extend incubation time with antibody

    • Pre-clear lysate with protein A/G beads

    • Verify protein expression in input samples

  • Co-IP difficulties:

    • Test different lysis conditions to preserve protein-protein interactions

    • Use gentler wash conditions

    • Consider crosslinking approaches for transient interactions

Storage and Handling:

  • Store bs-16783r-HRP at -20°C in aliquots to avoid repeated freeze-thaw cycles

  • Follow storage buffer recommendations (TBS with BSA, Proclin300, and Glycerol)

  • Check antibody expiration date and storage conditions

Implementing these systematic approaches should resolve most technical issues with KLF12 antibody applications.

How can KLF12 antibodies be used to investigate its role in reproductive biology and implantation failure?

KLF12 antibodies provide valuable tools for investigating its critical role in reproductive biology, particularly in relation to implantation failure and decidualization. Based on the research data, several advanced experimental approaches can be employed:

Endometrial expression analysis in clinical samples:

  • IHC analysis comparing KLF12 expression in endometrial tissues from:

    • Normal fertile women across the menstrual cycle

    • Patients with repeated implantation failure (RIF)

    • Women with recurrent pregnancy loss

  • The bs-16783r-HRP antibody (1:100-500 dilution) is suitable for IHC-P and IHC-F applications

  • Research has already established elevated KLF12 expression in endometria of patients with RIF

Correlation with FOXO1 expression:

  • Dual immunostaining for KLF12 and FOXO1 to examine their inverse relationship

  • Western blot analysis of both proteins in patient samples

  • Research has demonstrated that elevated KLF12 expression is accompanied by decreased FOXO1 expression in RIF patients

Functional analysis in cellular models:

  • Transfection/transduction studies in human endometrial stromal cells (hESCs):

    • Overexpression of KLF12 using adenoviral vectors (as demonstrated in referenced studies)

    • siRNA knockdown of KLF12 to rescue decidualization

    • Assessment of decidualization markers after manipulation of KLF12 levels

  • Western blotting with KLF12 antibodies to confirm expression changes

Analysis of KLF12-FOXO1 regulatory interaction:

  • Chromatin immunoprecipitation (ChIP) using KLF12 antibodies to confirm binding to the FOXO1 promoter region

  • Focus on the identified binding site: CAGTGGG element within the FOXO1 promoter

  • Reporter gene assays with wild-type and mutant FOXO1 promoter constructs

Animal models:

  • IHC analysis of KLF12 expression in mouse uterine tissues during early pregnancy

  • Western blot analysis of uterine tissues from hormone-primed mice

  • Reference data showed that increased KLF12 expression in mouse uterus repressed uterine decidualization

Quantitative approaches:

  • Densitometric analysis of Western blots to quantify KLF12 and FOXO1 levels

  • Image analysis of IHC staining intensity and distribution

  • Correlation analysis between KLF12 levels and clinical outcomes

These approaches allow comprehensive investigation of KLF12's role in reproductive failure, potentially leading to novel diagnostic or therapeutic strategies for implantation failure.

What techniques can be used to study KLF12's transcriptional repression activity using KLF12 antibodies?

Investigating KLF12's transcriptional repression activity requires combining KLF12 antibodies with sophisticated molecular techniques to elucidate protein-DNA interactions and functional outcomes:

Chromatin Immunoprecipitation (ChIP) assays:

  • Use KLF12 antibodies to immunoprecipitate chromatin fragments containing KLF12 binding sites

  • PCR-amplify specific promoter regions (e.g., AP-2-alpha gene promoter, FOXO1 promoter)

  • ChIP-seq to identify genome-wide KLF12 binding sites

  • For KLF12-FOXO1 interaction, focus on the CAGTGGG element identified within the FOXO1 promoter (-2637 to -2601 bp)

  • Procedure refinement:

    • Cross-link cells with 1% formaldehyde

    • Sonicate chromatin to 200-500 bp fragments

    • Immunoprecipitate with KLF12 antibody (6 μg per reaction, based on IP protocols)

    • Include appropriate controls (non-immune IgG, input chromatin)

DNA-protein interaction analysis:

  • Electrophoretic mobility shift assays (EMSA) to confirm direct binding:

    • Design oligonucleotide probes containing putative KLF12 binding sites

    • Include wild-type and mutant sequences (e.g., CAGTGGG vs. CACAAAG for FOXO1)

    • Use nuclear extracts containing KLF12 or recombinant KLF12

    • Supershift assays with KLF12 antibodies to confirm specificity

  • Avidin-biotin conjugate DNA precipitation (ABCD) assays:

    • Use biotinylated oligonucleotides based on target promoter sequences

    • Precipitate DNA-protein complexes with streptavidin beads

    • Detect KLF12 in complexes by Western blot

Reporter gene assays:

  • Construct luciferase reporters with wild-type and mutant promoters

  • Co-transfect with KLF12 expression vectors in appropriate cell lines

  • Measure transcriptional repression activity

  • Confirm KLF12 expression levels by Western blot

  • Analyze dose-dependent effects using multiple KLF12 concentrations

Proteomic approaches to identify co-repressors:

  • Immunoprecipitation with KLF12 antibodies followed by mass spectrometry

  • Co-immunoprecipitation to detect specific interactions with known co-repressors

  • Proximity ligation assays to visualize protein-protein interactions in situ

Functional validation in cellular models:

  • Manipulate KLF12 expression in relevant cell types (e.g., endometrial stromal cells)

  • Use adenoviral vectors for overexpression (MOI = 25 and 50, as in reference studies)

  • Measure target gene expression by qRT-PCR and Western blot

  • Referenced studies showed that KLF12 overexpression in hESCs resulted in significant dose-dependent decreases in FOXO1 mRNA and protein expression

For optimal results, use antibodies validated for the specific application (e.g., bs-16783r-HRP for Western blot detection of KLF12 in functional studies) .

How can I design experiments to investigate KLF12-FOXO1 interactions in implantation failure models?

Designing experiments to investigate KLF12-FOXO1 interactions in implantation failure requires a multi-level approach spanning molecular, cellular, and in vivo systems. Based on the available research data, a comprehensive experimental design would include:

1. Molecular level analysis:

Promoter binding and regulation studies:

  • ChIP-PCR targeting the FOXO1 promoter region:

    • Focus on the identified KLF12 binding element (CAGTGGG) within the FOXO1 promoter (-2637 to -2601 bp)

    • Compare binding in normal vs. RIF patient-derived endometrial cells

    • Quantify enrichment using qPCR

Binding site mutation analysis:

  • Reporter gene assays with luciferase constructs:

    • Wild-type FOXO1 promoter (containing CAGTGGG)

    • Mutant FOXO1 promoter (CACAAAG mutated sequence)

    • Co-transfection with varying amounts of KLF12 expression vectors

    • Measure dose-dependent repression

2. Cellular level investigation:

Expression correlation studies:

  • Western blot analysis of KLF12 and FOXO1 in:

    • Primary endometrial stromal cells from control vs. RIF patients

    • Cell lines with manipulated KLF12 expression

  • Use validated antibodies:

    • bs-16783r-HRP for KLF12 (1:500-2000 dilution)

    • Appropriate FOXO1 antibody

Functional rescue experiments:

  • Decidualization assessment in endometrial stromal cells:

    • Control cells

    • KLF12-overexpressing cells (using adenoviral vectors at MOI 25-50)

    • KLF12-overexpressing cells with forced FOXO1 expression

    • KLF12-knockdown cells

  • Measure decidualization markers (prolactin, IGFBP-1)

  • Assess morphological transformation

3. In vivo models:

Mouse model experiments:

  • Uterine-specific manipulation of KLF12:

    • Adenovirus-mediated overexpression in mouse uterus

    • Conditional knockout models

  • Artificial decidualization protocol:

    • Hormone priming with E2 and P4

    • Artificial stimulation of decidualization

  • Analysis methods:

    • Morphological assessment of deciduoma formation

    • Histological examination of uterine sections

    • IHC analysis of KLF12 and FOXO1 expression

    • Western blot quantification of protein levels

4. Translational clinical studies:

Patient sample analysis:

  • Endometrial biopsies from:

    • Fertile controls at mid-secretory phase

    • RIF patients at equivalent cycle phase

  • Analysis methods:

    • IHC for spatial distribution of KLF12 and FOXO1

    • Dual immunofluorescence to assess co-localization

    • Western blot for quantitative expression analysis

    • qRT-PCR for mRNA levels

Expression correlation with clinical outcomes:

  • Prospective study of KLF12 levels in endometrial biopsies

  • Correlation with:

    • Subsequent implantation success/failure

    • Pregnancy outcomes

    • Number of failed IVF cycles

5. Data analysis and integration:

Experimental ApproachParameters MeasuredExpected Results in RIF
Western BlotKLF12 and FOXO1 protein levels↑ KLF12, ↓ FOXO1
qRT-PCRKLF12 and FOXO1 mRNA expression↑ KLF12, ↓ FOXO1
ChIP-PCRKLF12 binding to FOXO1 promoter↑ Enrichment at CAGTGGG element
Reporter AssaysLuciferase activity↓ Activity with ↑ KLF12
Decidualization AssaysProlactin, IGFBP-1 levels↓ Markers with ↑ KLF12
Mouse ModelsDeciduoma formation↓ Formation with ↑ KLF12
IHC AnalysisProtein localizationNuclear KLF12, ↓ FOXO1

This comprehensive experimental design allows for thorough investigation of the KLF12-FOXO1 regulatory axis in implantation failure, potentially revealing new therapeutic targets for treating RIF.

Comparative Analysis and Method Selection

Understanding the trade-offs between HRP-conjugated and unconjugated KLF12 antibodies is essential for optimal experimental design across different research contexts:

Advantages of HRP-conjugated KLF12 antibodies (e.g., bs-16783r-HRP):

Limitations of HRP-conjugated antibodies:

  • Reduced flexibility:

    • Fixed HRP reporter system without amplification options

    • Cannot switch detection systems without changing primary antibody

    • Limited to HRP-compatible detection methods

  • Potentially reduced sensitivity:

    • No secondary amplification step (typically 2-10 secondary antibodies can bind each primary)

    • May require higher primary antibody concentration (bs-16783r-HRP recommended at 1:100-500 for IHC)

    • Signal enhancement technologies like tyramide amplification more complicated

  • Storage considerations:

    • HRP conjugates generally less stable long-term than unconjugated antibodies

    • More sensitive to repeated freeze-thaw cycles (aliquoting recommended)

    • Potential for HRP denaturation affecting enzymatic activity

Advantages of unconjugated KLF12 antibodies (e.g., ab129459, ABIN2855792):

  • Detection flexibility:

    • Compatible with multiple secondary detection systems (HRP, AP, fluorescent conjugates)

    • Can switch between chromogenic and fluorescent workflows

    • Applicable across diverse imaging platforms

  • Signal amplification options:

    • Secondary antibody binding provides natural signal amplification

    • Compatible with biotinylated secondaries and avidin-biotin complexes for enhanced sensitivity

    • Titratable amplification by adjusting secondary antibody concentration

  • Dual-purpose utility:

    • Same primary antibody usable for multiple applications (ab129459 validated for both WB and IP)

    • More economical for labs performing diverse experimental techniques

    • Compatible with protein A/G-based purification methods

Limitations of unconjugated antibodies:

  • Longer protocols:

    • Additional secondary antibody incubation (typically 1-2 hours)

    • More washing steps required

    • Increased hands-on time

  • Potential background issues:

    • Secondary antibody can introduce non-specific binding

    • Cross-reactivity concerns in multi-species samples or multiplexing experiments

    • More blocking optimization required

Context-specific recommendations:

Experimental ContextRecommended FormatRationale
Routine Western blottingHRP-conjugatedFaster protocol, direct detection
ImmunoprecipitationUnconjugatedBetter performance in solution-phase binding
Co-localization IHC/IFHRP-conjugatedAvoids species cross-reactivity issues
Low abundance targetsUnconjugatedBetter signal amplification options
Multi-application studiesUnconjugatedGreater experimental flexibility
Time-sensitive experimentsHRP-conjugatedFaster workflow, fewer steps

When selecting between HRP-conjugated bs-16783r-HRP and unconjugated options like ab129459 or ABIN2855792 , researchers should carefully consider these advantages and limitations in relation to their specific experimental requirements, balancing convenience against flexibility and sensitivity needs.

How can I integrate KLF12 antibody-based detection with other molecular techniques to comprehensively study transcriptional regulation?

Comprehensive investigation of KLF12-mediated transcriptional regulation requires integrating antibody-based detection with complementary molecular techniques to create a multi-dimensional analytical framework:

Integrated ChIP-seq and RNA-seq approach:

  • ChIP-seq for genome-wide binding:

    • Immunoprecipitate chromatin using KLF12 antibodies (ab129459 validated for IP)

    • Sequence precipitated DNA fragments to identify genome-wide binding sites

    • Bioinformatic analysis to identify enriched DNA motifs (e.g., CAGTGGG element)

    • Integrate with existing genomic databases and transcription factor binding sites

  • RNA-seq for expression consequences:

    • Compare transcriptomes of:

      • KLF12-overexpressing cells (adenoviral vectors at MOI 25-50)

      • KLF12-knockdown cells (siRNA)

      • Control cells

    • Identify differentially expressed genes (DEGs)

    • Confirm KLF12 expression changes via Western blot using bs-16783r-HRP

  • Integration analysis:

    • Cross-reference ChIP-seq binding sites with RNA-seq DEGs

    • Identify direct transcriptional targets with evidence of both binding and expression change

    • Pathway enrichment analysis of regulated gene networks

Multi-level protein-DNA-RNA analysis:

  • Sequential ChIP (Re-ChIP):

    • First IP with KLF12 antibody

    • Second IP with antibodies against co-repressors or histone modifiers

    • Identify genomic regions with co-occupancy

    • Western blot verification of protein interactions

  • CRISPR-based functional genomics:

    • Generate KLF12 knockout cell lines

    • Create specific mutations in KLF12 binding sites (e.g., FOXO1 promoter CAGTGGG element)

    • Analyze consequences for target gene expression

    • Rescue experiments with wild-type vs. mutant KLF12

    • Confirm protein expression patterns using bs-16783r-HRP in Western blot

  • Epigenetic analysis:

    • ChIP for histone modifications at KLF12 binding sites

    • DNA methylation analysis of target promoters (e.g., FOXO1)

    • Integrate with KLF12 binding data to understand regulatory mechanisms

    • Western blot for KLF12 expression correlation

Advanced protein interaction studies:

  • Proximity-dependent labeling:

    • BioID or APEX2 fused to KLF12

    • Identify nearby proteins in living cells

    • Validate interactions by co-IP with KLF12 antibodies

    • Western blot confirmation using HRP-conjugated antibodies for direct detection

  • Mass spectrometry integration:

    • IP using KLF12 antibodies (ab129459)

    • Mass spectrometric analysis of co-precipitated proteins

    • Identification of novel interaction partners

    • Validation by reciprocal IP and Western blot

Application to the KLF12-FOXO1 regulatory axis:

Technique CombinationScientific QuestionExpected Outcome
ChIP-seq + RNA-seqIdentify all genes directly regulated by KLF12Genome-wide map of KLF12 binding sites correlated with expression changes
ChIP + DNA methylationExamine epigenetic context of KLF12 bindingCorrelation between KLF12 binding, methylation status, and gene expression
IP-MS + Co-IPIdentify KLF12 co-repressor complex componentsNovel protein interactions involved in transcriptional repression
CRISPR editing + WBTest necessity of CAGTGGG element in FOXO1 repressionConfirmation of direct regulatory mechanism
Single-cell RNA-seq + IHCExamine cellular heterogeneity in KLF12-FOXO1 relationshipCell-type specific regulatory patterns in reproductive tissues

This integrated approach allows researchers to simultaneously address multiple aspects of KLF12-mediated transcriptional regulation, from genome-wide binding patterns to specific mechanistic questions about the KLF12-FOXO1 regulatory axis identified in implantation failure studies . The combination of antibody-based detection methods with complementary molecular techniques provides a comprehensive understanding that no single technique could achieve alone.

What are the future directions for KLF12 antibody applications in reproductive biology research?

The continued development and application of KLF12 antibodies opens several promising avenues for future research in reproductive biology, particularly in understanding implantation failure and developing potential therapeutic approaches:

Advanced diagnostic applications:

  • Development of standardized IHC protocols using KLF12 antibodies for endometrial receptivity assessment

  • Exploration of KLF12 as a biomarker for repeated implantation failure prediction

  • Creation of multiplexed antibody panels combining KLF12 with FOXO1 and other decidualization markers

  • Integration with machine learning algorithms for automated tissue analysis and outcome prediction

Therapeutic target validation:

  • Using KLF12 antibodies to validate the efficacy of interventions targeting the KLF12-FOXO1 axis

  • Monitoring KLF12 expression changes in response to potential therapeutic compounds

  • Development of blocking peptides or aptamers targeting KLF12 binding sites

  • Evaluation of targeted epigenetic modifiers to regulate KLF12 expression

Single-cell and spatial analysis:

  • Application of KLF12 antibodies in single-cell protein analysis platforms

  • Integration with spatial transcriptomics to map KLF12 expression in the endometrial microenvironment

  • Multiplex immunofluorescence to study KLF12 co-localization with transcriptional cofactors

  • 3D reconstruction of KLF12 distribution in the implantation site

Systems biology approaches:

  • Network analysis integrating KLF12 with other transcription factors in decidualization

  • Multi-omics approaches combining KLF12 antibody-based proteomics with transcriptomics and epigenomics

  • Temporal dynamics studies of KLF12 expression throughout the menstrual cycle and early pregnancy

  • Comparative studies across species to identify conserved KLF12 regulatory mechanisms

Clinical translation opportunities:

  • Development of non-invasive detection methods for KLF12 expression status

  • Creation of predictive models incorporating KLF12 levels for personalized reproductive medicine

  • Design of targeted interventions to modulate the KLF12-FOXO1 regulatory axis

  • Establishment of reference standards for KLF12 expression in normal versus pathological endometrium

These future directions build upon the established role of KLF12 as a negative regulator of endometrial decidualization and its association with implantation failure . The continued refinement of KLF12 antibodies, particularly HRP-conjugated variants with enhanced sensitivity and specificity, will be crucial for advancing these research areas and ultimately improving outcomes for patients experiencing reproductive challenges.

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