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- Table of Contents
Plan DSTN chromogenic IHC in paraffin sections around the reported general cytoplasmic staining pattern (HPA tissue IHC). High staining in colon glandular cells offers a positive reference, but antibody staining has low consistency with RNA expression (HPA tissue IHC).
Expected localisation, validated protocols, controls and antibodies — the at-a-glance facts below, then the full design guide.
| Expected localisation | General cytoplasmic staining (HPA tissue IHC) | |
| Staining pattern | Cytoplasmic staining in glandular cells (HPA tissue IHC) | |
| Antigen retrieval | EDTA pH 8.0 HIER, heat-mediated (datasheet M03849-2) | |
| Positive control | Adrenal gland+4 more · see all | |
| Negative control | Adipose tissue+2 more · see all |
| Fixation | Keep fixation consistent across sections (standard IHC practice; not target-specific) | |
| Caveat | Staining and RNA expression show low consistency (HPA tissue IHC) | |
| Regulation | Specific expression regulators unreported (UniProt) | |
| Isoform / epitope | 2 isoforms; epitope coverage is unknown (UniProt) |
The catalog antibody protocol uses EDTA pH 8.0 heat retrieval (datasheet: M03849-2). The published myocardial tissue protocol below provides a second IHC workflow (PMC12306564 methods).
| Sample | Paraffin-embedded mouse small intestine tissue; fixative not specified (datasheet M03849-2) |
| Fixation | Image fixative and duration unreported (datasheet M03849-2); verify before use. |
| Sectioning | 4–5 µm sections on charged slides (standard) |
| Deparaffinisation | Xylene, graded ethanol series to water (standard) |
| Antigen retrieval | Heat retrieval: EDTA pH 8.0 (datasheet M03849-2); 20 min, 95–100 °C (standard) |
| Peroxidase block | 3% H2O2, 10 min, room temperature (standard) |
| Blocking | 10% goat serum (datasheet M03849-2) |
| Primary antibody | Rabbit monoclonal (clone 19D11) anti-DSTN, 1:50 (datasheet M03849-2) |
| Primary incubation | Overnight at 4 °C (datasheet M03849-2) |
| Detection | HRP-conjugated secondary, DAB chromogen (datasheet M03849-2) |
| Counterstain | Hematoxylin, blue, dehydrate and mount (standard) |
| Expected result | DSTN-positive staining in glandular cells of adrenal gland (HPA tissue IHC: High). HPA tissue profile: General cytoplasmic expression. No signal in the no-primary control. |
In paraffin-section IHC, expect mainly cytoplasmic DSTN staining in glandular cells of several tissues and in cerebellar Purkinje cells (HPA: general cytoplasmic expression; High in listed glandular cells and Purkinje cells). DSTN has no transmembrane segment (UniProt P60981: topology). HPA rates the tissue IHC profile Approved, while reporting low consistency between antibody staining and RNA expression; interpret the pattern with that qualification (HPA: reliability description).
| Clear cytoplasmic staining in colon or duodenal glandular cells, with visible cell boundaries and limited surrounding deposit. | This fits the reported IHC compartment and a cell population scored High in both tissues (HPA: general cytoplasmic expression; High in colon and duodenum glandular cells). Compare intensity among cells on the same section before treating a weak field as a biological difference (general IHC practice). |
| Strong nuclear-only staining, with little or no cytoplasmic signal in an otherwise readable section. | Nuclear-only signal does not match the reported general cytoplasmic IHC profile (HPA: tissue IHC profile). Check antibody dilution, detection chemistry, and a control section before assigning it to DSTN (general IHC practice). UniProt provides no DSTN subcellular annotation to support a nuclear call (UniProt P60981: subcellular location unannotated). |
| Prominent staining of adipocytes, hippocampal glial cells, or skeletal-muscle myocytes. | These populations were scored Not detected, so reproducible signal warrants scrutiny for cross-reactivity or endogenous detection activity (HPA: adipocytes, hippocampal glia, and skeletal-muscle myocytes Not detected; general IHC practice). A reported absence is a comparison point, not proof that every specimen must be blank (HPA: tissue IHC profile). |
| Brown deposit spreads across stroma, section edges, or the whole slide without resolving individual cell cytoplasm. | Treat a widespread, poorly localized deposit as background until controls show otherwise (general chromogenic IHC practice). It cannot by itself establish the cytoplasmic pattern reported for DSTN (HPA: general cytoplasmic expression); compare a no-primary control and inspect whether staining tracks tissue structures (general IHC practice). |
| No detectable signal in well-preserved colon or duodenal glandular cells. | A blank result conflicts with the reported High staining in those cells, but does not alone identify the cause (HPA: High in colon and duodenum glandular cells). Review positive-control performance, retrieval conditions, antibody dilution, and detection reagents as general IHC checks; no DSTN-specific retrieval requirement is supplied (general IHC practice). |
| Tissue and cell selection | Adrenal gland, appendix, colon, duodenum, endometrium, epididymis, and fallopian-tube glandular cells are scored High; Purkinje cells are also High (HPA: tissue IHC). Adipocytes, hippocampal glia, and skeletal-muscle myocytes are scored Not detected (HPA: tissue IHC). |
| Strength of the IHC evidence | The tissue profile is Approved, but HPA reports low consistency between antibody staining and RNA expression (HPA: reliability description). Its listed IHC antibody, CAB037094, is Approved; the supplied record does not label its IHC validation Enhanced (HPA: antibody validation). |
| Cellular compartment and topology | HPA describes general cytoplasmic tissue staining, and UniProt reports no transmembrane segment (HPA: tissue IHC profile; UniProt P60981: topology). Neither entry establishes a required membrane pattern in paraffin-section IHC (HPA: tissue IHC profile; UniProt P60981: subcellular location unannotated). |
| IF/ICC comparison? | HPA lists plasma membrane as the approved ICC-IF main location, with a caution that the result is based on antibodies targeting proteins from multiple genes (HPA: subcellular summary). Read that as a qualified IF observation; judge this IHC slide against HPA's cytoplasmic tissue profile (HPA: tissue IHC profile). |
| Isoforms and epitope interpretation | UniProt lists two DSTN isoforms and an ADF-H domain spanning residues 4–153 (UniProt P60981: isoforms and domains). Without an epitope map for the antibody, these facts do not predict which isoforms it recognizes or a retrieval setting (UniProt P60981: isoforms and domains; general IHC practice). |
| Situation | Likely cause | Next action |
|---|---|---|
| Known-positive glandular cells are blank. | The reported High signal is absent; the slide alone cannot distinguish assay failure from specimen variation (HPA: High in listed glandular cells; general IHC practice). | Check a positive-control section, detection reagents, antibody dilution, and retrieval settings; treat retrieval changes as general assay optimization (general IHC practice). |
| Most tissue structures stain similarly. | Uniform deposit obscures the expected cytoplasmic, cell-resolved profile (HPA: general cytoplasmic expression; general IHC practice). | Compare a no-primary control, inspect blocking and washes, and titrate antibody or detection reagents under the assay's standard controls (general IHC practice). |
| Red blood cells or other control-negative elements show chromogen. | Endogenous detection activity can contribute signal in chromogenic IHC (general IHC practice). | Use the appropriate endogenous-enzyme blocking step for the detection system and compare a no-primary control (general IHC practice). |
| Nuclei dominate while cytoplasm remains faint. | That distribution differs from the reported tissue IHC profile; UniProt has no subcellular annotation resolving it (HPA: general cytoplasmic expression; UniProt P60981: subcellular location unannotated). | Review counterstain, reagent concentration, and controls; avoid scoring nuclear-only deposit as expected DSTN staining (general IHC practice; HPA: tissue IHC profile). |
| Adipocytes or skeletal-muscle myocytes appear strongly positive. | Both are reported Not detected, making this an unexpected cell-type result that merits confirmation (HPA: adipocytes and skeletal-muscle myocytes Not detected). | Inspect morphology and a no-primary control, then compare staining in a reported High cell population on a control section (general IHC practice; HPA: tissue IHC). |
| IF images appear membrane-enriched while IHC looks cytoplasmic. | The modalities have different HPA observations, and the ICC-IF membrane assignment carries a multiple-gene antibody caution (HPA: subcellular summary; tissue IHC profile). | Score paraffin-section IHC using the reported cytoplasmic tissue pattern; consult the separate IF/ICC guide for that modality's interpretation (HPA: tissue IHC profile; subcellular summary). |
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Approved — Low 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.
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Adrenal gland | Glandular cells | High | Protein (IHC) | HPA → |
| Appendix | Glandular cells | High | Protein (IHC) | HPA → |
| Cerebellum | Purkinje cells | High | Protein (IHC) | HPA → |
| Colon | Glandular cells | High | Protein (IHC) | HPA → |
| Duodenum | Glandular cells | High | Protein (IHC) | HPA → |
Troubleshoot DSTN staining in paraffin sections by checking retrieval, controls, cellular distribution and scoring before interpreting differences between specimens.
The catalog antibody has IHC images from paraffin sections of mouse and rat small intestine (IHC captions); its IF captions give dilutions but no sample identity (IF captions).
M03849-2 has IHC images of paraffin sections from mouse and rat small intestine (IHC captions). Its IF images list 1:50 and 1:150 dilutions without identifying specimens (IF captions); human, mouse, and rat reactivity is listed in the catalog (catalog: reactivity).
Which to pick: For tissue IHC, choose M03849-2: its caption documents paraffin sections, EDTA retrieval at pH 8.0, and a 1:50 primary dilution; the fixative is unreported (M03849-2 IHC caption). For IF/ICC, the same rabbit monoclonal is listed for both applications, although its IF captions do not identify the samples (catalog: host, clonality, applications; IF captions). For work across species, the catalog lists human, mouse, and rat reactivity, with pictured IHC evidence for mouse and rat only (catalog: reactivity; IHC captions).