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- Table of Contents
Use high staining in colon glandular cells and absent staining in adipocytes as IHC reference patterns (HPA tissue IHC). Plan chromogenic staining with the IHC-P validated catalog antibody, starting at 1 μg/mL (datasheet: A04048-1).
Expected localisation, validated protocols, controls and antibodies — the at-a-glance facts below, then the full design guide.
| Expected localisation | Cytoplasmic tissue staining (HPA tissue IHC); secreted protein (UniProt) | |
| Staining pattern | GI glandular and CNS cells show cytoplasmic signal (HPA tissue IHC) | |
| Antigen retrieval | Citrate pH 6.0 HIER, 95–98 °C, 20 min (rule: cytoplasmic / membrane antigen) | |
| Positive control | Cerebellum+4 more · see all | |
| Negative control | Adipose tissue+4 more · see all |
| Fixation | Matched tissue-IHC evidence does not establish the fixation claim. Validate the specimen-specific method before use. (selected-SKU IHC image A04048) | |
| Caveat | RNA and protein locations may differ for this secreted protein (HPA tissue IHC) | |
| Regulation | High in several primary GI tumors (UniProt) | |
| Isoform / epitope | 0 annotated isoforms; mature chain spans aa 30–300 (UniProt) |
The catalog antibody protocol (datasheet) is paired with one published TNFRSF6B IHC protocol for paraffin sections (PMC2921593).
| Sample | Paraffin-embedded human colon t carcinoma tissue; fixative not specified (datasheet A04048) |
| Fixation | Image fixative and duration unreported (datasheet A04048); 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-TNFRSF6B, 1:100-1:300 (datasheet A04048) |
| 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 | TNFRSF6B-positive staining in purkinje cells of cerebellum (HPA tissue IHC: High). HPA tissue profile: Cytoplasmic expression in gastrointestinal tract and CNS. No signal in the no-primary control. |
TNFRSF6B is a secreted protein without a transmembrane segment (UniProt O95407 topology). In paraffin-section IHC, expect cytoplasmic staining in gastrointestinal glandular cells and selected CNS cells (HPA tissue IHC: Approved). HPA reports high staining in colon, duodenum, rectum and small-intestine glandular cells, cerebellar Purkinje cells, and cerebral-cortex endothelial cells (HPA tissue IHC). A secreted protein can leave its producing cell, so extracellular signal needs cautious interpretation (UniProt O95407; HPA reliability note).
| Cytoplasmic staining in intestinal glandular cells; high signal in colon, duodenum, rectum or small intestine (HPA tissue IHC). | This matches the reported tissue and cell pattern (HPA tissue IHC: Approved). Judge signal against adjacent cells and a negative control; cytoplasmic signal alone does not prove which cell made a secreted protein (UniProt O95407). |
| Staining in Purkinje cells or cerebral-cortex endothelial cells (HPA tissue IHC: High). | These are additional reported positive populations (HPA tissue IHC). Assess the named cell population rather than treating all CNS cells as equivalent: caudate glial cells have medium staining (HPA tissue IHC). |
| Predominantly nuclear or sharply membrane-confined staining, without the expected cytoplasmic pattern (HPA tissue IHC). | Treat this as an unexpected compartment pattern and investigate artefact before scoring it positive. TNFRSF6B is secreted and lacks a transmembrane segment (UniProt O95407); HPA describes cytoplasmic tissue expression (HPA tissue IHC). |
| Strong staining in a cell population reported as not detected, such as adipocytes or bone-marrow hematopoietic cells (HPA tissue IHC). | Consider antibody cross-reactivity or endogenous chromogenic activity; inspect the negative control and tissue morphology. HPA's not-detected calls apply to the named cells, not every cell in those tissues (HPA tissue IHC). |
| Diffuse color across several structures, or no signal in colon glandular cells (HPA tissue IHC: High). | Diffuse color is difficult to assign to a cell and may reflect background; loss of a reported positive suggests a staining-run or sample problem. Compare a negative control and a positive control before interpreting the specimen (HPA tissue IHC). |
| Secreted location and topology (UniProt O95407). | TNFRSF6B has a signal peptide and no transmembrane segment (UniProt O95407). Cytoplasmic IHC is reported (HPA tissue IHC), but extracellular signal need not identify its cell of origin. |
| Tissue and cell context (HPA tissue IHC). | Glandular cells are high in colon, duodenum, rectum and small intestine; appendix glandular cells are medium, and bronchial respiratory epithelial cells are low (HPA tissue IHC). Set expectations for the specific cells examined. |
| Protein versus RNA location (HPA reliability note). | HPA cautions that tissue RNA and protein locations can differ for a secreted protein (HPA tissue IHC). Lung-enhanced RNA does not by itself predict the strongest lung IHC staining (HPA tissue IHC). |
| Antibody evidence (HPA antibody record). | HPA047154 has Approved IHC status (HPA antibodies). The supplied record does not assign it Enhanced status; an unexpected pattern warrants independent checks rather than an automatic TNFRSF6B call. |
| Processing and modification (UniProt O95407). | The annotated chain is residues 30–300 after a 1–29 signal peptide, with one glycosylation site at residue 173 (UniProt O95407). These annotations do not establish an epitope, retrieval condition or fixation sensitivity. |
| ICC-IF evidence (HPA subcellular record). | HPA lists TNFRSF6B as secreted but supplies no main ICC-IF location or cell-line images (HPA subcellular). Tissue IHC observations cannot establish an ICC-IF pattern. |
| Situation | Likely cause | Next action |
|---|---|---|
| No staining in colon glandular cells despite an expected high pattern (HPA tissue IHC). | The run, specimen or detection steps may have failed; the supplied sources do not identify a TNFRSF6B-specific fixation effect. | Check the positive-control section and reagent steps, then review the section's morphology and repeat the run if needed (general IHC practice). |
| Strong nuclear-only staining replaces cytoplasmic staining (HPA tissue IHC). | The compartment conflicts with the reported cytoplasmic pattern and secreted topology (HPA tissue IHC; UniProt O95407). | Compare with a negative control and confirm the stained structures before assigning TNFRSF6B positivity (general IHC practice). |
| Color appears broadly in reported negative cell populations (HPA tissue IHC). | Cross-reactivity or endogenous chromogenic activity is possible; HPA's negative calls are cell-specific (HPA tissue IHC). | Inspect a control lacking primary antibody, review blocking and detection, and score the named cells separately (general IHC practice). |
| Diffuse chromogen obscures cell boundaries (general IHC practice). | Nonspecific background or detection activity may obscure the reported cytoplasmic pattern (HPA tissue IHC). | Review blocking, washes, antibody concentration and development time; use a negative control to locate background (general IHC practice). |
| Bronchus looks weak beside colon (HPA tissue IHC). | HPA reports low staining in bronchial respiratory epithelial cells and high staining in colon glandular cells (HPA tissue IHC). | Score each named cell population against its own expected level before changing the IHC conditions (HPA tissue IHC). |
| Can the tissue IHC pattern guide an ICC-IF call? | HPA provides no ICC-IF images or assigned main subcellular location for TNFRSF6B (HPA subcellular). | Use the separate IF/ICC guide for that application; treat cytoplasmic tissue IHC as context, not ICC-IF validation (HPA tissue IHC; HPA subcellular). |
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Approved — Secreted protein, tissue location of RNA and protein is expected to differ.). Rows are taken directly from the HPA tissue chart — click any row's HPA link to view the source.
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Cerebellum | Purkinje cells | High | Protein (IHC) | HPA → |
| Cerebral cortex | Endothelial cells | High | Protein (IHC) | HPA → |
| Colon | Glandular cells | High | Protein (IHC) | HPA → |
| Duodenum | Glandular cells | High | Protein (IHC) | HPA → |
| Rectum | Glandular cells | High | Protein (IHC) | HPA → |
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Adipose tissue | Adipocytes | Not detected | Protein (IHC) | HPA → |
| Adrenal gland | Glandular cells | Not detected | Protein (IHC) | HPA → |
| Bone marrow | Hematopoietic cells | Not detected | Protein (IHC) | HPA → |
| Breast | Adipocytes | Not detected | Protein (IHC) | HPA → |
| Cervix | Glandular cells | Not detected | Protein (IHC) | HPA → |
Troubleshoot chromogenic TNFRSF6B staining in paraffin sections using its secreted topology, reported tissue patterns, and the selected antibody’s tissue image.
The catalog shows TNFRSF6B IHC figures for human colon carcinoma and heart tissue, plus an IF figure with no specimen identified (A04048 and A04048-1 image captions).
A04048 has an IHC image of paraffin-embedded human colon carcinoma and an IF image with no specimen identified (A04048 image captions). A04048-1 has an IHC image of human heart tissue and lists IHC-P for human, mouse and rat reactivity; its figure shows human tissue only (A04048-1 image caption; catalog applications and reactivity).
Which to pick: For paraffin-section IHC, choose A04048 when its human colon carcinoma example fits your use; the caption does not report the fixative (A04048 IHC image caption). For IF, choose the polyclonal A04048, which lists IF and has an IF figure; ICC is not listed (A04048 dilution record, applications and IF image caption). For mouse or rat IHC-P, consider A04048-1 based on its listed reactivity, while recognizing that its IHC figure shows human heart tissue and does not report tissue processing or fixation (A04048-1 catalog applications, reactivity and IHC image caption).