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- Table of Contents
Plan CHCHD10 IHC in paraffin sections using the granular cytoplasmic tissue profile and high staining in gut endocrine cells and kidney collecting ducts (HPA tissue IHC). The catalog antibody A06312 lists 2–5 μg/mL for human IHC-P (datasheet A06312).
Expected localisation, validated protocols, controls and antibodies — the at-a-glance facts below, then the full design guide.
| Expected localisation | Granular cytoplasmic tissue staining (HPA tissue IHC) | |
| Staining pattern | Granular cytoplasm; high in gut endocrine cells and kidney collecting ducts (HPA tissue IHC) | |
| Antigen retrieval | EDTA pH 8.0 HIER, heat-mediated (datasheet A06312) | |
| Positive control | Appendix+4 more · see all | |
| Negative control | Adipose tissue+4 more · see all |
| Fixation | Keep fixation consistent across sections (standard IHC practice; not target-specific); target-specific effects are unknown. | |
| Caveat | Antibody staining and RNA show medium consistency (HPA tissue IHC) | |
| Regulation | Higher expression in heart and liver (UniProt) | |
| Isoform / epitope | No isoforms listed; processed chain spans residues 17–142 (UniProt) |
The catalog antibody’s IHC-P protocol uses EDTA pH 8.0 retrieval (datasheet A06312). The published chromogenic IHC protocol below uses Tris-EDTA pH 9 (PMC12486031: Methods).
| Sample | Paraffin-embedded human colonic adenocarcinoma tissue; fixative not specified (datasheet A06312) |
| Fixation | Image fixative and duration unreported (datasheet A06312); 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 A06312); 20 min, 95–100 °C (standard) |
| Peroxidase block | 3% H2O2, 10 min, room temperature (standard) |
| Blocking | 10% goat serum (datasheet A06312) |
| Primary antibody | Rabbit anti-CHCHD10, 2-5μg/ml (datasheet A06312) |
| Primary incubation | Overnight at 4 °C (datasheet A06312) |
| Detection | Streptavidin-biotin complex (SABC), DAB chromogen (datasheet A06312) |
| Counterstain | Hematoxylin, blue, dehydrate and mount (standard) |
| Expected result | CHCHD10-positive staining in endocrine cells of appendix (HPA tissue IHC: High). HPA tissue profile: Granular cytoplasmic expression in several different tissue types. No signal in the no-primary control. |
CHCHD10 localizes to the mitochondrial intermembrane space and is enriched at cristae junctions; it has no transmembrane segment (UniProt Q8WYQ3). In paraffin-section IHC, expect granular cytoplasmic staining in several tissues, particularly endocrine cells of the appendix and intestine and kidney collecting ducts (HPA: tissue IHC). HPA rates the tissue staining Enhanced, with medium consistency between antibody staining and RNA expression (HPA: tissue IHC).
| Discrete cytoplasmic granules in intestinal or appendix endocrine cells, or kidney collecting ducts. | This fits the reported high-staining cell populations and granular tissue pattern (HPA: tissue IHC). Score the relevant cells and compartment rather than treating every cell in a positive section as positive; expression varies by cell type (HPA: tissue IHC). |
| Predominantly nuclear, surface, or broad extracellular staining, without a granular cytoplasmic component. | This conflicts with mitochondrial localization and the reported tissue pattern (UniProt Q8WYQ3; HPA: tissue IHC). Treat it as a possible staining artefact; general IHC practice: compare morphology, a reagent control, and an independently validated stain before assigning specificity. |
| Strong staining of adipocytes or respiratory epithelial cells instead of the expected positive cells. | HPA reports no detection in adipocytes of adipose tissue or breast, or respiratory epithelium of the bronchus (HPA: tissue IHC). Unexpected staining raises concern for cross-reactivity or endogenous detection activity; general IHC practice: check a no-primary control. It does not establish either cause by itself. |
| Uniform haze across cells, stroma, and empty areas, obscuring discrete granules. | The distribution does not match the reported granular cytoplasmic pattern (HPA: tissue IHC). General IHC practice: assess background with a no-primary control and review blocking, washes, and detection exposure before scoring faint cellular signal. |
| No signal in appendix endocrine cells or kidney collecting ducts. | Both are reported high-staining populations (HPA: tissue IHC), so a blank result calls for a technical check before interpreting the specimen as CHCHD10-negative. General IHC practice: confirm that the expected cells are present and review antibody, retrieval, and detection controls. |
| Cell type and tissue selection | High staining is reported in endocrine cells of the appendix, colon, duodenum, rectum, and small intestine, and in kidney collecting ducts (HPA: tissue IHC). Several other populations have low or undetected staining, so select controls by cell type rather than tissue name alone (HPA: tissue IHC). |
| Antibody validation and interpretation limit | HPA003440 has Enhanced IHC validation; HPA describes medium consistency between antibody staining and RNA expression (HPA: antibody record; tissue IHC). This supports the reported pattern but does not make every stained cell specific. Compare compartment and cell identity when scoring (HPA: tissue IHC; UniProt Q8WYQ3). |
| Mitochondrial position and processing | UniProt places CHCHD10 in the intermembrane space, enriched at cristae junctions, and annotates a mature chain spanning residues 17–142 (UniProt Q8WYQ3). These annotations guide compartment interpretation; they provide no antibody epitope or target-specific retrieval requirement. |
| What should IF/ICC show? | A mitochondrial pattern is supported by HPA ICC-IF images from A-431 and PC-3 cells (HPA: subcellular ICC-IF). This is a separate application: the IHC tissue pattern and ICC-IF localization answer different questions, and the supplied evidence provides no IF/ICC protocol. |
| Situation | Likely cause | Next action |
|---|---|---|
| The positive control is blank. | A technical failure is possible when a reported high-staining population gives no signal (HPA: tissue IHC). Cell composition may also differ within a section. | Verify the expected endocrine cells or collecting ducts are present (HPA: tissue IHC). General IHC practice: check primary antibody, retrieval, detection reagents, and counterstain against a working control. |
| Only nuclei or cell surfaces stain. | The compartment conflicts with mitochondrial localization and granular cytoplasmic tissue staining (UniProt Q8WYQ3; HPA: tissue IHC). The pattern alone cannot identify the source. | General IHC practice: inspect a no-primary control, compare cellular morphology, and repeat with a validated antibody or independent localization readout before calling CHCHD10 positive. |
| Unexpected cells show strong color while expected cells do not. | Cell-type distribution conflicts with HPA observations; for example, bronchial respiratory epithelium is reported undetected while intestinal endocrine cells can be high (HPA: tissue IHC). | Check that cell identities and section landmarks are correct (HPA: tissue IHC). General IHC practice: use a no-primary control to assess endogenous detection activity, then reassess primary-antibody specificity. |
| Granules are hard to distinguish from diffuse background. | Background can obscure the reported granular cytoplasmic pattern (HPA: tissue IHC). Its source cannot be determined from the supplied CHCHD10 evidence. | General IHC practice: compare with a no-primary control, review blocking and washes, and adjust detection exposure before scoring. Keep a clear positive-control section in the same run (HPA: high-staining cell populations). |
| A heart or liver section stains weakly despite expected expression. | UniProt reports higher expression in heart and liver, while the supplied HPA high IHC examples identify other cell populations (UniProt Q8WYQ3; HPA: tissue IHC). Expression level alone does not predict staining intensity in a particular section. | Use the reported high-staining HPA cell populations to assess the IHC run (HPA: tissue IHC). General IHC practice: review section quality and detection controls before concluding the target is absent. |
| The tissue stain seems diffuse, but IF/ICC appears mitochondrial. | HPA reports granular cytoplasmic tissue IHC and supported mitochondrial ICC-IF localization (HPA: tissue IHC; subcellular ICC-IF). The assays present localization at different visual scales. | Score the IHC section against cell identity and granular cytoplasmic appearance (HPA: tissue IHC). Use the ICC-IF result as a localization cross-check, without treating it as proof that diffuse chromogenic staining is specific (HPA: subcellular ICC-IF). |
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Enhanced — Medium 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 |
|---|---|---|---|---|
| Appendix | Endocrine cells | High | Protein (IHC) | HPA → |
| Colon | Endocrine cells | High | Protein (IHC) | HPA → |
| Duodenum | Endocrine cells | High | Protein (IHC) | HPA → |
| Kidney | Collecting ducts | High | Protein (IHC) | HPA → |
| Rectum | Endocrine cells | High | Protein (IHC) | HPA → |
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Adipose tissue | Adipocytes | Not detected | Protein (IHC) | HPA → |
| Bone marrow | Hematopoietic cells | Not detected | Protein (IHC) | HPA → |
| Breast | Adipocytes | Not detected | Protein (IHC) | HPA → |
| Bronchus | Respiratory epithelial cells | Not detected | Protein (IHC) | HPA → |
| Caudate | Glial cells | Not detected | Protein (IHC) | HPA → |
Troubleshoot CHCHD10 staining in paraffin sections by checking retrieval, cellular pattern, detection controls and cell-specific scoring (datasheet A06312; HPA tissue IHC).
A06312 has documented CHCHD10 IHC in human paraffin sections and IF/ICC in CACO-2 cells (catalog image captions).
A06312 is listed for IHC and IF/ICC (catalog applications). Its IHC captions show human paraffin sections of colonic adenocarcinoma, liver cancer, lung cancer, and ovarian serous adenocarcinoma; its IF caption shows CACO-2 cells (catalog image captions).
Which to pick: Choose A06312 for tissue IHC: its own images document human paraffin sections, with 2 μg/ml antibody after EDTA pH 8 retrieval (A06312 IHC captions). Choose A06312 for IF/ICC in CACO-2 cells at 5 μg/ml (A06312 IF caption). The catalog lists human, monkey, mouse, and rat reactivity, but the supplied IHC and IF images establish only the stated samples; clonality and the tissue fixative are unreported (catalog reactivity; A06312 image captions).