This website uses cookies to ensure you get the best experience on our website.
- Table of Contents
This IHC-P guide uses the observed nuclear and nuclear membranous tissue pattern to plan TPR staining and scoring (HPA tissue IHC). It also flags mitotic redistribution when interpreting cells with atypical staining (UniProt).
Expected localisation, validated protocols, controls and antibodies — the at-a-glance facts below, then the full design guide.
| Expected localisation | Nuclear and nuclear membranous staining (HPA tissue IHC) | |
| Staining pattern | Ubiquitous nuclear and nuclear membranous staining (HPA tissue IHC) | |
| Antigen retrieval | Citrate pH 6 HIER, heat-mediated (datasheet A00695-1) | |
| Positive control | Adrenal gland+4 more · see all | |
| Negative control | None in HPA (detected in all 45 tissues); use no-primary + isotype controls |
| 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 A00695-1) | |
| Caveat | Mitotic TPR redistributes to the spindle (UniProt) | |
| Regulation | No expression regulator established (UniProt) | |
| Isoform / epitope | 2 isoforms; epitope differences unreported (UniProt) |
The catalog antibody's IHC-P protocol (datasheet A00695-1) is accompanied by four published TPR tissue IHC protocols (PMC13109368; PMC5862582; PMC8078762; PMC8225803).
| Sample | Paraffin-embedded human lung cancer tissues; fixative not specified (datasheet A00695-1) |
| Fixation | Image fixative and duration unreported (datasheet A00695-1); verify before use. |
| Sectioning | 4–5 µm sections on charged slides (standard) |
| Deparaffinisation | Xylene, graded ethanol series to water (standard) |
| Antigen retrieval | Heat retrieval: Citrate pH 6, 20 min (datasheet A00695-1) |
| Peroxidase block | 3% H2O2, 10 min, room temperature (standard) |
| Blocking | 10% goat serum (datasheet A00695-1) |
| Primary antibody | Rabbit anti-TPR, 0.5-1μg/ml (datasheet A00695-1) |
| Primary incubation | Overnight at 4 °C (datasheet A00695-1) |
| Detection | Streptavidin-biotin complex (SABC), DAB chromogen (datasheet A00695-1) |
| Counterstain | Hematoxylin, blue, dehydrate and mount (standard) |
| Expected result | TPR-positive staining in glandular cells of adrenal gland (HPA tissue IHC: High). HPA tissue profile: Ubiquitous nuclear and nuclear membranous expression. No signal in the no-primary control. |
TPR should stain the nuclear membrane and nucleus across many cell types in paraffin IHC sections (HPA: ubiquitous nuclear and nuclear membranous expression). Its interphase position at the nuclear pore complex supports a nuclear rim pattern (UniProt P12270: nuclear basket localization). High staining is reported in several glandular, hematopoietic, neuronal and glial populations (HPA: tissue IHC). Tissue IHC reliability is Enhanced, with high consistency between antibody staining and RNA expression (HPA: reliability).
| Nuclear rim staining, with some intranuclear signal, in colon glandular cells. | This fits the reported nuclear membranous and nuclear pattern (HPA: tissue IHC) in a high-staining cell population (HPA: colon glandular cells, High). Assess the rim against nuclear morphology and the counterstain; a uniformly filled nucleus alone is less specific for the expected rim pattern (HPA: tissue IHC). |
| Strong staining confined mainly to cytoplasm, without a nuclear rim. | Treat this as a compartment mismatch for an interphase tissue section: the observed IHC profile is nuclear and nuclear membranous (HPA: tissue IHC). UniProt also lists cytoplasmic and spindle locations, including mitotic redistribution (UniProt P12270: subcellular location); review cell-cycle context before assigning a cytoplasmic signal to artefact. |
| Strong staining in cells outside the expected high-staining population, while the expected cells remain weak. | For example, cholangiocytes are reported as Low, whereas several glandular populations are High (HPA: tissue IHC). An unexpected cell-type reversal warrants checks for cross-reactivity or endogenous chromogenic activity (general IHC practice). HPA's listed cells are examples, not an exhaustive map of negative cell types (HPA: tissue IHC). |
| Diffuse chromogen covers nuclei, cytoplasm and tissue spaces. | A broad, compartment-independent deposit obscures the reported nuclear and nuclear membranous distribution (HPA: tissue IHC). Check background with appropriate negative controls and review blocking, antibody concentration and detection chemistry (general IHC practice). Do not score diffuse deposit as TPR-positive cells without a discernible cellular pattern. |
| No staining in a section containing an expected high-staining population. | Absent signal in colon glandular cells or bone-marrow hematopoietic cells conflicts with their reported High staining (HPA: tissue IHC). First review section quality, detection controls and the antibody's IHC validation (general IHC practice; HPA: IHC Enhanced for HPA019661, HPA019663 and HPA024336). A blank slide alone does not establish absent TPR expression. |
| Which cells make useful positive references? | Colon glandular cells, bone-marrow hematopoietic cells and cerebellar Bergmann glia nuclei are reported High (HPA: tissue IHC). Choose a reference whose cell identity is clear on the section (general IHC practice). |
| How should low staining be interpreted? | Cholangiocytes are listed as Low, not negative (HPA: liver cholangiocytes). A faint result there is less informative as a failure check than an absent result in a reported High population (HPA: tissue IHC). |
| What does antibody validation establish? | HPA019661, HPA019663 and HPA024336 each have Enhanced IHC status (HPA: antibody validation). HPA reports high agreement between tissue staining and RNA expression (HPA: reliability); this supports the overall pattern, not every deposit on an individual slide. |
| Do isoforms or modifications change the expected slide pattern? | Two isoforms and modified residues are recorded (UniProt P12270: isoforms and modified residues). The supplied evidence does not assign a distinct IHC pattern or antibody epitope to either isoform (UniProt P12270; HPA: antibody data), so avoid isoform-specific interpretation. |
| Is a TPR-specific antigen-retrieval or fixation effect established? | No target-specific retrieval response or fixation sensitivity is supplied (UniProt P12270; HPA: tissue IHC). Select and verify retrieval conditions using the chosen antibody's validated IHC procedure and section controls (general IHC practice). |
| What should IF/ICC show? | HPA reports an enhanced nuclear-membrane location in ICC-IF images from A-431, U-251MG, U2OS and KOLF2.1J cells (HPA: subcellular). This supports a nuclear-rim localization check for IF/ICC (HPA: subcellular); IF/ICC procedure selection belongs to its separate guide. |
| Situation | Likely cause | Next action |
|---|---|---|
| Expected high-staining cells are blank. | The result conflicts with reported High tissue staining (HPA: tissue IHC); a failed staining run is one possibility (general IHC practice). | Confirm cell identity and section quality, then inspect positive and detection controls and the selected antibody's validated IHC procedure (general IHC practice). |
| Signal appears only in cytoplasm. | That differs from the usual nuclear and nuclear membranous IHC profile (HPA: tissue IHC), although mitotic TPR can associate with spindle structures (UniProt P12270: subcellular location). | Check nuclear boundaries and mitotic morphology; compare with a known high-staining reference before scoring the cytoplasmic signal (general IHC practice; HPA: tissue IHC). |
| The nuclear rim is hidden by widespread brown deposit. | Diffuse background can conceal compartment localization (general IHC practice; HPA: nuclear and nuclear membranous profile). | Review negative controls, blocking, antibody concentration and chromogenic detection; score only interpretable cells after background is resolved (general IHC practice). |
| Unexpected cells stain strongly but reference cells do not. | Cross-reactivity or endogenous chromogenic activity may account for a reversed cell pattern (general IHC practice); HPA lists high and low examples, not a complete negative-cell list (HPA: tissue IHC). | Compare the named cell populations on the same or a reference section and inspect appropriate reagent controls before assigning TPR positivity (HPA: tissue IHC; general IHC practice). |
| A low-staining liver cell population seems negative. | Cholangiocytes are reported Low, so their faint signal can be difficult to judge (HPA: liver cholangiocytes; general IHC practice). | Use a reported High cell population to assess run performance instead of treating cholangiocytes as a negative or decisive positive control (HPA: tissue IHC). |
| The pattern differs between antibodies. | An individual reagent or staining run may account for disagreement; three listed antibodies carry Enhanced IHC status (HPA: antibody validation; general IHC practice). | Compare nuclear-rim localization and cell-type distribution under each antibody's validated conditions, then resolve discrepancies with controls before interpreting the section (HPA: tissue IHC; general IHC practice). |
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.
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Adrenal gland | Glandular cells | High | Protein (IHC) | HPA → |
| Bone marrow | Hematopoietic cells | High | Protein (IHC) | HPA → |
| Bronchus | Ciliated cells (cell body) | High | Protein (IHC) | HPA → |
| Caudate | Neuronal cells | High | Protein (IHC) | HPA → |
| Cerebellum | Bergmann glia - nucleus | High | Protein (IHC) | HPA → |
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| None in HPA: TPR is detected in all 45 scored tissues. Use a no-primary (secondary-only) and an isotype control instead. | ||||
Troubleshoot TPR staining by checking retrieval, nuclear envelope localisation, and cell-specific controls before interpreting chromogenic signal.
Both anti-TPR antibodies have paraffin-section IHC images from human, mouse and rat samples (catalog: IHC image captions); IF images cover tissue sections and cultured cells (catalog: IF image captions).
A00695-1 has IHC images from human lung cancer, mouse brain and kidney, and rat spleen, plus IF images from human intestinal cancer and mouse brain sections (catalog: A00695-1 image captions). A00695-2 has IHC images from human colorectal cancer, mouse brain and rat brain sections, plus IF images from SiHa and CACO-2 cells (catalog: A00695-2 image captions).
Which to pick: For paraffin-section IHC, choose A00695-1 when using citrate retrieval at pH 6, or A00695-2 when using EDTA retrieval at pH 8.0 (catalog: each SKU’s IHC image captions); fixation is unreported in both captions. For IF in tissue sections, A00695-1 has image evidence; for ICC/IF in cultured cells, A00695-2 has image evidence (catalog: IF image captions and application lists). Both list human, mouse and rat reactivity and have IHC images from all three species; clonality is unreported for both (catalog: reactivity, IHC image captions and clone fields).