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MAGEA4 / Melanoma-associated antigen 4 · IHC design guide
Design Immunohistochemistry for MAGEA4
Plan chromogenic IHC for MAGEA4 using testicular spermatogonia as a positive tissue reference (HPA tissue IHC). This guide covers fixation, staining controls and scoring; the supplied tissue evidence does not establish a subcellular pattern (HPA tissue IHC).
Evidence assembled Oct 2026 · For research use; verify linked source records and product datasheet before use
MAGEA4 Immunohistochemistry Experimental Design Guide
Expected localisation, validated protocols, controls and antibodies — the at-a-glance facts below, then the full design guide.
Must know before staining
| Expected localisation | Spermatogonia; subcellular pattern unestablished (HPA tissue IHC) | |
| Staining pattern | Staining in testicular spermatogonia; compartment unspecified (HPA tissue IHC) | |
| Antigen retrieval | Citrate pH 6.0 HIER, 95–98 °C, 20 min (rule: cytoplasmic / membrane antigen) | |
| Positive control | Testis | |
| Negative control | Adipose tissue+4 more · see all |
Important caveats
Reasons your staining may differ from the expected pattern.
| Fixation | Keep fixation consistent across sections (standard IHC practice; not target-specific); Matched tissue-IHC evidence does not establish the fixation claim. Validate the specimen-specific method before use. (selected-SKU IHC image A07175) | |
| Caveat | Normal spermatogonia can stain positive (HPA tissue IHC) | |
| Regulation | Tumor-associated expression (UniProt) | |
| Isoform / epitope | No annotated isoforms; one 1–317 chain (UniProt) |
Section 1
Recommended MAGEA4 IHC & IF Protocols
The catalog antibody’s IHC-P protocol is accompanied by published MAGEA4 IHC workflows for testis and ovarian cancer samples (PMC6936721; PMC9916968).
| Sample | Tissue sections; selected-image fixative not specified (standard IHC workflow) |
| Fixation | Image fixative and duration unreported (datasheet A07175); verify before use. |
| Sectioning | 4–5 µm sections on charged slides (standard) |
| Deparaffinisation | Xylene, graded ethanol series to water (standard) |
| Antigen retrieval | Heat-induced epitope retrieval in citrate buffer, pH 6.0, 20 min at 95–98 °C (standard rule: cytoplasmic / membrane antigen) |
| Peroxidase block | 3% H2O2, 10 min, room temperature (standard) |
| Blocking | 10% normal serum of the secondary host, 30 min, room temperature (standard) |
| Primary antibody | Rabbit anti-MAGEA4, 5 μg/mL (datasheet A07175) |
| Primary incubation | Overnight at 4 °C (standard) |
| Detection | HRP-polymer secondary, DAB chromogen 5–10 min (standard) |
| Counterstain | Hematoxylin, blue, dehydrate and mount (standard) |
| Expected result | MAGEA4-positive staining in spermatogonia cells of testis (HPA tissue IHC: High). HPA tissue profile: Expression in spermatogonia in seminiferous ducts of testis. No signal in the no-primary control. |
💡Decision noteStart with citrate pH 6.0 HIER at 95–98 °C for 20 min (page retrieval). The testis study also reports a microwave citrate condition (PMC6936721).
Section 2
What Is the Expected MAGEA4 Staining Pattern?
MAGEA4 should stain spermatogonia in testis, where HPA reports high expression with Enhanced tissue IHC reliability (HPA tissue IHC). HPA ICC-IF places MAGEA4 mainly in nuclear speckles, with additional cytosolic localization; that cellular pattern is guidance, not a compartment assignment for paraffin tissue sections (HPA subcellular ICC-IF). UniProt reports no transmembrane segment and does not annotate a subcellular location (UniProt P43358 topology and subcellular record).
| Strong staining in spermatogonia, with nearby cells serving as visual context (HPA tissue IHC). | This matches the HPA testis pattern: spermatogonia are rated high, and tissue IHC reliability is Enhanced (HPA tissue IHC). Assess the named cell population, not just whether the section contains brown signal. |
| Staining appears chiefly at cell borders or in a compartment inconsistent with nuclear speckles or cytosol. | Recheck localization and slide quality before calling it MAGEA4. HPA reports nuclear speckles plus cytosol in ICC-IF, while UniProt annotates no membrane span; neither source establishes an IHC compartment pattern (HPA subcellular ICC-IF; UniProt P43358 topology). |
| Strong staining appears in adipocytes or other cells HPA lists as undetected (HPA tissue IHC). | Treat that pattern as suspect for cross-reactivity or endogenous detection activity, then compare appropriate controls (general IHC practice). An HPA 'not detected' result describes its reported tissue and cell context, not an absolute exclusion across every specimen (HPA tissue IHC). |
| Broad haze or uniform color obscures cell boundaries and the spermatogonial pattern. | Diffuse background prevents a cell-specific call. Review the negative control, blocking, washes and chromogen exposure before scoring (general IHC practice); HPA's Enhanced reliability does not validate an individual noisy run (HPA tissue IHC). |
| No convincing staining is seen in testis spermatogonia. | A negative testis control challenges the run because HPA reports high spermatogonial staining (HPA tissue IHC). Check tissue identity and preservation, antibody preparation, retrieval and detection controls as general IHC practice; the supplied sources do not specify MAGEA4 fixation sensitivity. |
💡Expected MAGEA4 appearanceCall a positive IHC result when spermatogonia show distinct, strong staining consistent with HPA's high testis signal; treat widespread haze or strong staining in HPA-undetected cell types as suspect, while using ICC-IF nuclear speckles and cytosol only as compartment guidance (HPA tissue IHC; HPA subcellular ICC-IF).
| Tissue and cell context | HPA reports high staining in testis spermatogonia, low staining in placental trophoblastic cells, and no detection in the listed negative cell populations (HPA tissue IHC). These levels support selecting and reading controls by cell type; they do not predict every tumor specimen. |
| IF/ICC Q&A: where should cellular signal appear? | Mainly in nuclear speckles, with additional cytosolic signal (HPA subcellular ICC-IF). This is an ICC-IF observation, so confirm tissue IHC by its spermatogonial pattern rather than demanding visible speckles in a chromogenic section (HPA tissue IHC). |
| Topology and processing | UniProt lists no transmembrane segment, signal peptide or propeptide, and one chain spanning residues 1–317 (UniProt P43358 topology and processing). These annotations give no basis to expect a membrane-restricted or shed-antigen staining pattern. |
| Antibody validation | HPA rates tissue IHC Enhanced for HPA021942 and CAB040535; ICC is Approved for HPA021942, with no ICC status supplied for CAB040535 (HPA antibody records). Apply the validation status to the stated assay, not automatically to another detection method. |
| Situation | Likely cause | Next action |
|---|---|---|
| Testis spermatogonia are negative. | The run may have failed, or the sampled section may lack evaluable spermatogonia; HPA expects high staining in those cells (HPA tissue IHC). | Confirm the cell population on the counterstain and review positive-control tissue, antibody preparation, retrieval and detection steps (general IHC practice). Avoid claiming a MAGEA4-specific fixation effect: none is supplied. |
| Color is present throughout the section, including HPA-undetected cells. | Non-specific antibody binding or endogenous detection activity can produce broad staining (general IHC practice); HPA reports several cell populations as not detected (HPA tissue IHC). | Compare a negative control and inspect blocking, detection chemistry, washes and chromogen exposure (general IHC practice). Score MAGEA4 only where the staining remains cell-specific and controls support it. |
| Only placental trophoblastic cells show faint staining. | HPA rates these cells low, so a faint result there has less separation from background than high-staining testis spermatogonia (HPA tissue IHC). | Compare staining with the negative control and a testis positive control before assigning a positive call (general IHC practice; HPA tissue IHC). Do not use faint placental color alone to establish a failed or successful run. |
| Staining is sharply membrane-restricted. | UniProt lists no transmembrane segment, and HPA ICC-IF reports nuclear speckles plus cytosol (UniProt P43358 topology; HPA subcellular ICC-IF). The supplied tissue IHC record does not settle compartment localization. | Review morphology and negative controls, then seek confirmation with an independently validated IHC antibody if available (general IHC practice; HPA antibody records). Do not score membrane color alone as the expected pattern. |
| An IF/ICC image looks diffuse instead of speckled. | HPA places the main ICC-IF signal in nuclear speckles and an additional signal in cytosol; diffuse fluorescence alone does not reproduce that description (HPA subcellular ICC-IF). | Review nuclear counterstain, optical focus and negative control before interpretation (general IF practice). Use the separate IF/ICC guide for assay setup; this section supplies no IF/ICC protocol. |
| Two slides or antibodies give different tissue patterns. | HPA lists two antibodies with Enhanced IHC validation, but that status does not guarantee identical staining in every specimen or run (HPA antibody records). | Compare the same cell populations and controls, check assay-specific validation, and resolve discordance before scoring (general IHC practice). Preserve the distinction between HPA tissue IHC evidence and ICC-IF localization evidence. |
Experiment evidence
IHC & IF images showing MAGEA4 staining
A07175 · IHCImmunohistochemistry of MAGEA4 in human breast tumor with MAGEA4 antibody at 5 μg/mL.
A07175 · IFImmunofluorescence of MAGEA4 in human breast cancer tissue with MAGEA4 antibody at 20 μg/ml.
HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000147381-MAGEA4/tissue/cerebral+cortex#imid_20214813
HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000147381-MAGEA4/tissue/colon#imid_20214731
HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000147381-MAGEA4/tissue/liver#imid_20214748
HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000147381-MAGEA4/tissue/kidney#imid_20214733
HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody HPA021942; green = MAGEA4, blue = nucleus, red = microtubules.
HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody HPA021942; green = MAGEA4, blue = nucleus, red = microtubules.
← swipe / scroll for more images →
Real IHC / IF data behind the staining-pattern expectations in this section.
Sample controls for MAGEA4 IHC & IF
🧪Run testis first: spermatogonia should stain (HPA: High in spermatogonia). Use adipose tissue as a negative tissue (HPA: Not detected in adipocytes); cells independently verified as negative within the testis section should show only background staining.
Positive control tissue: Testis (Spermatogonia cells, HPA High)
Negative control tissue: Adipose tissue (HPA Not detected)
ICC-IF cell lines (HPA subcellular resource): HPA ICC-IF images show MAGEA4 in A-431, U-251MG, U2OS, with annotated localisation: Nuclear speckles (approved) (HPA subcellular).
Technical controls: Include no-primary (secondary-only) and host-species- and isotype-matched irrelevant antibody controls, plus a confirmed MAGEA4 knockout sample or a peptide-block control if the immunizing peptide is available (standard IHC practice). For testis, assess endogenous peroxidase or biotin background in chromogenic IHC and autofluorescence in IF (standard IHC/IF practice).
⚠️Feasibility: A target-specific fixation window or fixation effect is unreported, and the selected A07175 breast-tumor IHC caption does not state a fixative (caption: A07175). Retrieval dependence is also unreported; assess retrieval with the testis positive control before scoring paraffin sections (HPA: High in spermatogonia; standard IHC practice). The supplied evidence does not establish whether frozen sections or IF/ICC are easier than paraffin IHC, although ICC-IF images are available for A-431, U-251MG and U2OS (HPA: subcellular images).
HPA tissue IHC evidence for MAGEA4
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Enhanced — High consistency between antibody staining and RNA expression data.). Rows are taken directly from the HPA tissue chart — click any row's HPA link to view the source.
Positive expression · recommended positive controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Testis | Spermatogonia cells | High | Protein (IHC) | HPA → |
Undetected expression · recommended negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Adipose tissue | Adipocytes | Not detected | Protein (IHC) | HPA → |
| Adrenal gland | Glandular cells | Not detected | Protein (IHC) | HPA → |
| Appendix | Glandular cells | Not detected | Protein (IHC) | HPA → |
| Bone marrow | Hematopoietic cells | Not detected | Protein (IHC) | HPA → |
| Breast | Adipocytes | Not detected | Protein (IHC) | HPA → |
Section 3
Advanced MAGEA4 IHC Tips
Use matched controls and cell level staining patterns to troubleshoot MAGEA4 chromogenic IHC in paraffin sections.
How should I troubleshoot weak MAGEA4 staining after antigen retrieval?
Use citrate pH 6.0 HIER at 95–98 °C for 20 min on paraffin sections (page retrieval setting). Keep cooling, washing and detection conditions consistent while comparing runs (standard IHC practice). Include testis with spermatogonia as a positive reference and an appropriate negative control on each run (HPA tissue IHC; standard IHC practice). If staining remains weak, compare a modestly longer retrieval time on adjacent sections, recording tissue damage and background alongside signal (standard IHC practice). The page setting is a starting condition; the supplied evidence does not establish an optimal retrieval duration for every specimen (page retrieval setting).
Could fixation explain weak or uneven MAGEA4 staining?
MAGEA4 specific fixation sensitivity is unknown from the supplied evidence (selected A07175 caption; HPA tissue IHC). The A07175 breast tumor IHC caption gives 5 µg/mL antibody but does not state the fixative, so it cannot establish a fixation condition (selected A07175 caption). Record the fixative and fixation duration for each specimen, then compare sections processed with the same retrieval and detection conditions (standard IHC practice). Assess weak regions against nearby tissue morphology, because poor preservation and variable processing can complicate staining assessment (standard IHC practice). Do not infer fixation sensitivity from the protein’s topology, modification record or HPA staining pattern (UniProt P43358; HPA tissue IHC).
Which staining compartments are plausible for MAGEA4 in paraffin sections?
Review nuclear and cytoplasmic staining separately: HPA ICC/IF places MAGEA4 mainly in nuclear speckles and additionally in the cytosol (HPA subcellular). UniProt gives no subcellular annotation, so those ICC/IF observations are a reference rather than proof of an identical paraffin IHC pattern (UniProt P43358; HPA subcellular). The protein has no annotated transmembrane segment or signal peptide, making a crisp membrane rim an unexpected pattern that needs validation (UniProt P43358 topology and processing). Compare the suspect compartment with testis spermatogonia and a matched negative control under the same chromogenic conditions (HPA tissue IHC; standard IHC practice). Record nuclear and cytoplasmic scores independently when both appear (standard IHC practice).
How can epitope uncertainty affect MAGEA4 IHC results?
The supplied record lists a 317 amino acid chain, a MAGE domain spanning residues 110–309, and no annotated isoforms (UniProt P43358). It lists no glycosylation sites or modified residues, but those annotations do not locate the catalog antibody’s epitope (UniProt P43358). If one specimen stains and another does not, first compare retrieval, fixation records and tissue preservation before assigning the difference to a molecular variant (standard IHC practice). Ask for the antibody’s mapped immunogen or epitope if available, and check whether it overlaps the MAGE domain before interpreting discordant staining (UniProt P43358; standard IHC practice). An absent isoform annotation does not establish that every sample exposes the same epitope (UniProt P43358; standard IHC practice).
How should I assess MAGEA4 by IF alongside this IHC guide?
For multiplex IF, pair MAGEA4 with a validated spermatogonia marker when examining testis, since spermatogonia show high tissue IHC signal (HPA tissue IHC; standard IF practice). Choose a spectrally separated, preferably far red fluorophore after checking the specimen’s autofluorescence in each channel (standard IF practice). Because MAGEA4 has no transmembrane segment and HPA observes nuclear speckles plus cytosol, include a permeabilisation condition suitable for intracellular epitopes (UniProt P43358 topology; HPA subcellular; standard IF practice). Compare permeabilised and control preparations before interpreting a missing nuclear signal, as the antibody epitope is unspecified here (standard IF practice). Keep IF localisation findings distinct from claims about chromogenic paraffin IHC performance (HPA subcellular; selected A07175 caption).
What should I check when MAGEA4 chromogenic staining is widespread?
First compare the specimen with a no primary control and an appropriate negative tissue area under the same detection conditions (standard IHC practice). MAGEA4 is reported in testis spermatogonia and many tumors, while HPA reports no detection in several listed normal cell populations, so diffuse staining across every cell type warrants scrutiny (UniProt P43358 tissue specificity; HPA tissue IHC). Check endogenous peroxidase blocking, antibody concentration, wash quality and DAB development time as separate sources of background (standard chromogenic IHC practice). The A07175 breast tumor caption used 5 µg/mL; that image concentration does not establish the best working concentration for another specimen (selected A07175 caption). Record whether background follows tissue folds, edges or damaged areas (standard IHC practice).
How should I quantify heterogeneous MAGEA4 staining? ⚠ ANSWER MARKED FOR VERIFICATION
Define the cell population and compartment before scoring, then report the percentage of positive cells and staining intensity separately (standard IHC practice). An H-score can combine the percentages at intensity grades 0–3 into a 0–300 score when grading rules are fixed in advance (standard IHC practice). If counting positive cells per mm², normalise to the measured viable tissue area and report the compartment assessed (standard IHC practice). In testis, distinguish spermatogonia from other cells because HPA reports high signal in spermatogonia (HPA tissue IHC). In tumors, exclude necrosis and processing artefacts consistently, and compare cases processed with the same staining and scoring conditions (standard IHC practice).
When is an apparent MAGEA4 positive result convincing?
A convincing result follows the expected cell population and survives comparison with matched controls and tissue morphology (HPA tissue IHC; standard IHC practice). High staining in testis spermatogonia is supported by HPA, while tumor expression is compatible with the UniProt tissue specificity record (HPA tissue IHC; UniProt P43358). Nuclear speckles and cytosol are observed in HPA ICC/IF; an isolated membrane rim merits scrutiny because UniProt lists no transmembrane segment (HPA subcellular; UniProt P43358 topology). Discount staining confined to section edges, folds or necrotic regions, and investigate signal retained in a no primary control for endogenous enzyme or detection background (standard IHC practice). Interpret focal tumor staining by cell identity and viable area, rather than intensity alone (standard IHC practice).
Boster reagents
Best MAGEA4 / Melanoma-associated antigen 4 IHC Antibodies
The catalog antibody has IHC and IF data from human breast tumors or tissue and ICC data from HeLa cells (catalog image captions); its listed reactivity is human, mouse and rat (catalog: A07175).
Real IHC data
Anti-Melanoma-associated antigen 4 MAGEA4 Antibody
Cat # A07175
A07175 will render with an IHC image of human breast tumor at 5 μg/mL (A07175 IHC image caption). Its catalog also shows IF in human breast cancer tissue at 20 μg/mL and ICC in HeLa cells at 5 μg/mL (A07175 IF image captions).
Which to pick: Choose A07175 for paraffin-section IHC because IHC-P is listed and its IHC image shows human breast tumor; the image caption does not report the fixative (A07175 application list; A07175 IHC image caption). Choose the same SKU for IF or ICC based on its human breast tissue and HeLa images (A07175 IF image captions). For cross-species work, A07175 lists mouse and rat reactivity, but the supplied IHC and IF images show human samples only (catalog: A07175 reactivity; A07175 image captions).
Each figure is that product's own IHC / IF validation image from its datasheet.
References
- UniProt Consortium. UniProt entry P43358 (MAGA4_HUMAN, Melanoma-associated antigen 4).
- Human Protein Atlas. MAGEA4 tissue IHC expression (reliability: Enhanced).
- Human Protein Atlas. MAGEA4 subcellular location (ICC-IF): Mainly localized to the nuclear speckles. In addition localized to the cytosol..
- Human Protein Atlas. MAGEA4 antibody validation summary (2 antibodies).
- Assessment of fresh and cryopreserved testicular tissues from (pre)pubertal boys during organ culture as a strategy for in vitro spermatogenesis. Human reproduction (Oxford, England) 2019 — PMC6936721.
- Identification of two hidden clinical subgroups among men with idiopathic cryptozoospermia. Human reproduction (Oxford, England) 2024 — PMC11063552.
- Effects of Elevated β-Estradiol Levels on the Functional Morphology of the Testis - New Insights. Scientific reports 2017 — PMC5206739.
- Target Selection for T-Cell Therapy in Epithelial Ovarian Cancer: Systematic Prioritization of Self-Antigens. International journal of molecular sciences 2023 — PMC9916968.
- PubMed PMID:7927540 — UniProt-cited evidence.
- PubMed PMID:8037761 — UniProt-cited evidence.
- PubMed PMID:7642112 — UniProt-cited evidence.
Immunohistochemistry protocol sheet for MAGEA4 (Melanoma-associated antigen 4). Expected localisation Spermatogonia; subcellular pattern unestablished (HPA tissue IHC). Antigen retrieval: Citrate pH 6.0 HIER, 95–98 °C, 20 min (rule: cytoplasmic / membrane antigen). Validated IHC antibody: A07175 at 5 μg/mL (the product's own IHC validation image is shown). Controls (HPA): positive Testis (Spermatogonia cells); negative Adipose tissue. IHC workflow; specimen preparation unspecified. Protocol steps: 1. Sample: Tissue sections; selected-image fixative not specified (standard IHC workflow); 2. Fixation: Image fixative and duration unreported (datasheet A07175); verify before use.; 3. Sectioning: 4–5 µm sections on charged slides (standard); 4. Deparaffinisation: Xylene, graded ethanol series to water (standard); 5. Antigen retrieval: Heat-induced epitope retrieval in citrate buffer, pH 6.0 , 20 min at 95–98 °C…; 6. Peroxidase block: 3% H2O2, 10 min , room temperature (standard); 7. Blocking: 10% normal serum of the secondary host, 30 min , room temperature (standard); 8. Primary antibody: Rabbit anti-MAGEA4, 5 μg/mL (datasheet A07175); 9. Primary incubation: Overnight at 4 °C (standard). Watch for: Fixation: Keep fixation consistent across sections (standard IHC practice; not target-specific); Matched tissue-IHC evidence does not establish the fixation claim. Validate the specimen-specific method before use. (selected-SKU IHC image A07175); Caveat: Normal spermatogonia can stain positive (HPA tissue IHC); Isoform / epitope: No annotated isoforms; one 1–317 chain (UniProt); Regulation: Tumor-associated expression (UniProt). Evidence: UniProt P43358, HPA tissue IHC · Enhanced, HPA ICC-IF · Mainly localized to the nuclear speckles. In addition localized to…, Datasheet A07175, PMC6936721, PMC9916968. QR code links to https://www.bosterbio.com/bosterbio-gene-info-cards/MAGEA4/immunohistochemistry-ihc-guide.