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HSD17B1 / 17-beta-hydroxysteroid dehydrogenase type 1 · IHC design guide
Design Immunohistochemistry for HSD17B1
Plan HSD17B1 staining in paraffin sections using placental syncytiotrophoblast cytoplasm as the expected positive pattern (HPA tissue IHC). This guide covers fixation consistency, antibody titration, chromogenic detection, controls, and cell-specific scoring (standard IHC practice).
Evidence assembled Oct 2026 · For research use; verify linked source records and product datasheet before use
HSD17B1 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 | Cytoplasmic in placental trophoblasts (HPA tissue IHC) | |
| Staining pattern | Cytoplasmic syncytiotrophoblast cell-body staining (HPA tissue IHC) | |
| Antigen retrieval | EDTA pH 8.0 HIER, heat-mediated (datasheet PA1613-1) | |
| Positive control | Placenta | |
| Negative control | Adipose tissue+4 more · see all |
Important caveats
Reasons your staining may differ from the expected pattern.
| Fixation | Matched tissue-IHC evidence does not establish the fixation claim. Validate the specimen-specific method before use. (selected-SKU IHC image PA1613-1) | |
| Caveat | Trophoblast content can affect overall section signal (HPA tissue IHC) | |
| Regulation | Placenta-enriched expression (HPA tissue RNA) | |
| Isoform / epitope | No isoforms annotated; aa 2–328 chain, no extracellular domain (UniProt) |
Section 1
Recommended HSD17B1 IHC & IF Protocols
Compare the catalog antibody’s IHC-P protocol (datasheet PA1613-1) with four published chromogenic IHC protocols (PMC11906145; PMC9110888; PMC5481366; PMC12785116).
| Sample | Paraffin-embedded Rat Liver tissue; fixative not specified (datasheet PA1613-1) |
| Fixation | Image fixative and duration unreported (datasheet PA1613-1); verify before use. |
| Sectioning | 4–5 µm sections on charged slides (standard) |
| Deparaffinisation | Xylene, graded ethanol series to water (standard) |
| Antigen retrieval | Heat retrieval: EDTA pH 8.0 (datasheet PA1613-1); 20 min, 95–100 °C (standard) |
| Peroxidase block | 3% H2O2, 10 min, room temperature (standard) |
| Blocking | 10% goat serum (datasheet PA1613-1) |
| Primary antibody | Rabbit anti-HSD17B1, 0.5-1μg/ml (datasheet PA1613-1) |
| Primary incubation | Overnight at 4 °C (datasheet PA1613-1) |
| Detection | HRP-conjugated secondary, DAB chromogen (datasheet PA1613-1) |
| Counterstain | Hematoxylin, blue, dehydrate and mount (standard) |
| Expected result | HSD17B1-positive staining in syncytiotrophoblasts - cell body of placenta (HPA tissue IHC: High). HPA tissue profile: Cytoplasmic expression in placental trophoblasts. No signal in the no-primary control. |
💡Decision noteStart with heat-mediated EDTA pH 8.0 retrieval for the catalog antibody (datasheet PA1613-1). Test the published retrieval conditions when adapting those protocols (PMC11906145; PMC5481366; PMC12785116).
Section 2
What Is the Expected HSD17B1 Staining Pattern?
HSD17B1 should stain the cytoplasm of placental trophoblasts, with high staining reported in syncytiotrophoblast cell bodies (HPA tissue IHC: Enhanced; HPA: High in syncytiotrophoblasts). UniProt places HSD17B1 in the cytoplasm and annotates no transmembrane segment (UniProt P14061). Read the result by both cell type and compartment; signal elsewhere needs control-based review.
| Strong cytoplasmic staining in placental syncytiotrophoblast cell bodies. | This matches the reported positive tissue and cell type (HPA: High in syncytiotrophoblasts), the tissue-level cytoplasmic profile (HPA tissue IHC), and UniProt localisation (UniProt P14061). Use it as the reference pattern for judging other sections. |
| Predominantly nuclear, membranous, or extracellular staining, with little cytoplasmic signal. | The dominant compartment conflicts with the reported cytoplasmic localisation (UniProt P14061; HPA tissue IHC). Review the negative reagent control and staining distribution before interpreting it as HSD17B1; compartment mismatch alone does not identify the artefact. |
| Prominent staining in a cell type reported as undetected, such as adrenal glandular cells or adipocytes. | HPA reports HSD17B1 as not detected in those specified cells (HPA tissue IHC). Check for cross-reactivity or endogenous detection activity with appropriate controls. A negative result for one listed cell type does not establish that every cell in its tissue is negative. |
| Diffuse chromogen over tissue, including areas without a defined cellular pattern. | A uniform deposit does not resemble the reported syncytiotrophoblast cytoplasmic pattern (HPA tissue IHC). In general IHC practice, inadequate blocking, reagent background, or endogenous enzyme activity can obscure cell-level interpretation; compare negative controls. |
| No staining in an otherwise evaluable placental syncytiotrophoblast positive control. | This conflicts with the high staining reported for that cell type (HPA: High in syncytiotrophoblasts). Treat an accompanying negative study section as inconclusive until the control, antibody performance, retrieval, and detection steps have been checked. |
💡Expected HSD17B1 appearanceA convincing positive is high cytoplasmic staining in placental syncytiotrophoblast cell bodies (HPA tissue IHC; UniProt P14061); dominant nuclear or diffuse cell-independent signal warrants artefact review.
| Which compartment should drive the IHC call? | Use cytoplasmic staining as the localisation criterion (UniProt P14061; HPA tissue IHC). HSD17B1 has no annotated transmembrane segment (UniProt P14061); the supplied sources do not establish a membrane staining pattern. |
| Which tissue observation supports a positive control? | Placental syncytiotrophoblast cell bodies are reported as High, and the tissue IHC profile is rated Enhanced for consistency with RNA data (HPA tissue IHC). These observations support a control choice, not a guarantee that every section will stain. |
| How should the antibody evidence be read? | HPA021032 and HPA065296 each have Enhanced IHC validation (HPA antibodies). That status supports the reported pattern; it does not establish the specificity of an untested antibody or explain a discrepant result in a new run. |
| IF/ICC Q&A: where should signal appear? | Cytosol is the supported main location (HPA subcellular ICC-IF), consistent with UniProt cytoplasmic localisation (UniProt P14061). HPA021032 has Supported ICC validation (HPA antibodies). Use the separate IF/ICC guide for assay design. |
| Situation | Likely cause | Next action |
|---|---|---|
| Placental syncytiotrophoblast control is blank. | The result conflicts with reported High staining (HPA tissue IHC); a failed IHC step is possible, but this observation does not pinpoint one. | Check section integrity and the run controls, then review retrieval, primary antibody application, and chromogenic detection in sequence (general IHC practice). |
| Signal is mainly nuclear or outlines cell membranes. | The distribution disagrees with cytoplasmic localisation (UniProt P14061; HPA tissue IHC). Non-specific staining or an interpretation error is possible. | Compare cellular detail and negative reagent controls; score HSD17B1 only when the expected cytoplasmic pattern is supported (general IHC practice; HPA tissue IHC). |
| Adrenal glandular cells or adipocytes stain strongly. | Those listed cell types are reported as Not detected (HPA tissue IHC). Cross-reactivity or endogenous detection activity is possible. | Check the negative reagent control and staining morphology; repeat with an independently validated antibody if available (general IHC practice). Do not infer that the entire tissue is negative. |
| Brown deposit covers many structures without cell boundaries. | Diffuse deposit can arise from background or endogenous chromogenic activity (general IHC practice); it is unlike the reported cytoplasmic cell-body pattern (HPA tissue IHC). | Inspect negative controls and review blocking, washes, detection reagents, and counterstain before assigning cellular positivity (general IHC practice). |
| A study section is negative while its placental control stains as expected. | HPA establishes High staining in placental syncytiotrophoblasts, not universal expression across tissues (HPA tissue IHC). A study-section negative can therefore be interpretable. | Confirm the study section is evaluable and report the observed cell type and compartment; avoid converting a cell-specific HPA negative into a whole-tissue claim (HPA tissue IHC; general IHC practice). |
| Two IHC-validated antibodies give conflicting patterns. | Both listed antibodies have Enhanced IHC status (HPA antibodies), but validation does not resolve the source of a discrepancy in this run. | Compare matched sections, controls, and cytoplasmic staining in placental syncytiotrophoblasts (HPA tissue IHC; general IHC practice). Record the disagreement rather than treating either pattern as confirmed. |
Experiment evidence
IHC & IF images showing HSD17B1 staining
PA1613-1 · IHCIHC analysis of HSD17B1 using anti-HSD17B1 antibody (PA1613-1). HSD17B1 was detected in a paraffin-embedded section of Rat Liver tissue. Hea
PA1613-1 · IHCIHC analysis of HSD17B1 using anti-HSD17B1 antibody (PA1613-1). HSD17B1 was detected in a paraffin-embedded section of Rat Ovary tissue. Hea
PA1613-1 · IFICC analysis of HSD17B1 using anti-HSD17B1 antibody (PA1613-1). HSD17B1 was detected in an immunocytochemical section of Hela cells. Enzyme
A02198 · IHCIHC analysis of HSD17B1 using anti-HSD17B1 antibody (A02198). HSD17B1 was detected in a paraffin-embedded section of human placenta tissue.
A02198 · IFIF analysis of HSD17B1 using anti-HSD17B1 antibody (A02198). HSD17B1 was detected in immunocytochemical section of U20S cells. Enzyme antige
HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000108786-HSD17B1/tissue/cerebral+cortex#imid_5709940
HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000108786-HSD17B1/tissue/colon#imid_5709866
HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000108786-HSD17B1/tissue/liver#imid_5709859
HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000108786-HSD17B1/tissue/kidney#imid_5709860
HPA · ICC-IF U-251MGHuman Protein Atlas immunofluorescence, U-251MG, antibody HPA021032; green = HSD17B1, blue = nucleus, red = microtubules.
HPA · ICC-IF U-251MGHuman Protein Atlas immunofluorescence, U-251MG, antibody HPA021032; green = HSD17B1, blue = nucleus, red = microtubules.
← swipe / scroll for more images →
Real IHC / IF data behind the staining-pattern expectations in this section.
Sample controls for HSD17B1 IHC & IF
🧪Run placenta first: syncytiotrophoblast cell bodies should stain strongly (HPA: High in syncytiotrophoblast cell bodies). Run adipose tissue as the negative comparator, focusing on adipocytes (HPA: Not detected in adipocytes); on the placenta slide, cells outside the stained syncytiotrophoblasts should show only background staining, but their target-negative status requires separate validation (HPA: High is specified only for syncytiotrophoblast cell bodies).
Positive control tissue: Placenta (Syncytiotrophoblasts - cell body, HPA High)
Negative control tissue: Adipose tissue (HPA Not detected)
ICC-IF cell lines (HPA subcellular resource): HPA ICC-IF images show HSD17B1 in U-251MG, U2OS, with annotated localisation: Cytosol (supported) (HPA subcellular).
Technical controls: Include a no-primary, secondary-only control and nonimmune rabbit IgG matched to the primary antibody’s format (caption: rabbit primary antibody; standard IHC practice), plus HSD17B1-knockout material as a biological negative when available (standard IHC practice). Block endogenous peroxidase before HRP/DAB detection in placenta (caption: HRP/DAB detection; standard IHC practice), and assess placental autofluorescence in any IF experiment (standard IF practice).
⚠️Feasibility: A target-specific fixation window or fixation effect is unreported, and the selected paraffin-section caption does not state its fixative (caption: fixative not stated). Heat retrieval with EDTA at pH 8.0 was used in the reported paraffin IHC example, but retrieval dependence has not been established (caption: EDTA heat retrieval). Frozen sections cannot be ranked against paraffin IHC for ease from the supplied evidence; IF/ICC has cytosolic reference images, while placental autofluorescence may complicate IF interpretation (HPA subcellular: cytosol supported, U-251MG and U2OS images; standard IF practice).
HPA tissue IHC evidence for HSD17B1
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 |
|---|---|---|---|---|
| Placenta | Syncytiotrophoblasts - cell body | 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 HSD17B1 IHC Tips
Troubleshoot HSD17B1 staining in paraffin sections by checking retrieval, cytoplasmic localisation, cell identity and detection controls (datasheet PA1613-1; UniProt P14061; HPA tissue IHC).
What retrieval should I try first when HSD17B1 staining is weak?
Start with heat-mediated retrieval in EDTA, pH 8.0, for paraffin sections (datasheet PA1613-1). The selected rat liver image used this retrieval before incubation with 1 μg/ml antibody overnight at 4°C (caption PA1613-1). If staining remains weak, check that the section stayed immersed during heating and compare retrieval durations on adjacent sections (general IHC practice). Keep antibody concentration and detection conditions constant while testing retrieval, so any change is interpretable (general IHC practice). Judge improvement by clearer cytoplasmic staining with preserved tissue structure and low background, rather than by stronger chromogen alone (UniProt P14061 localisation; general IHC practice).
Could fixation explain variable HSD17B1 staining between paraffin blocks?
Yes, fixation differences can affect antigen accessibility in paraffin sections, but HSD17B1-specific fixation sensitivity is unknown from the supplied evidence (general IHC practice; caption PA1613-1). The selected tissue caption identifies a paraffin section but does not state its fixative or fixation duration (caption PA1613-1). Record each block's fixative, fixation time and processing history before comparing staining intensity across specimens (general IHC practice). Run sections from the same block together when adjusting EDTA, pH 8.0, retrieval or detection conditions (datasheet PA1613-1; general IHC practice). Do not infer a preferred fixative from the placental staining pattern or the protein's cytoplasmic localisation (HPA tissue IHC; UniProt P14061 localisation).
Where should convincing HSD17B1 chromogenic staining appear?
Expect staining in the cytoplasm, consistent with HSD17B1's annotated localisation and lack of a transmembrane segment (UniProt P14061 localisation and topology). Human tissue evidence places strong cytoplasmic expression in placental syncytiotrophoblast cell bodies, providing a useful reference for cell identity (HPA tissue IHC). The selected catalog image shows staining in a paraffin section of rat liver, so interpret its tissue context separately from the human placental profile (caption PA1613-1; HPA tissue IHC). Compare the stained compartment with a counterstain and the section's morphology before assigning positive cells (general IHC practice). Predominantly nuclear or sharp membrane staining warrants review of background and antibody specificity (UniProt P14061 localisation; general IHC practice).
Could an isoform or modified epitope explain inconsistent staining?
No alternative HSD17B1 isoforms are annotated in the supplied record, so an isoform-specific explanation lacks support here (UniProt P14061 isoforms). The record lists phosphorylation at serine 135, but supplies no evidence that this modification changes binding by the catalog antibody (UniProt P14061 modified residues). HSD17B1 has no annotated glycosylation sites or transmembrane segment, which supports evaluating a cytoplasmic staining pattern (UniProt P14061 glycosylation, topology and localisation). Check the antibody's documented immunogen or epitope before interpreting any staining difference as epitope loss (general IHC practice). Compare adjacent sections under matched retrieval and detection conditions to assess whether the difference persists (general IHC practice).
How should I assess HSD17B1 in a multiplex fluorescence experiment?
For a placental experiment, pair HSD17B1 with a marker that identifies syncytiotrophoblasts and assess signal within their cell bodies (HPA tissue IHC; general IF practice). Choose a fluorophore in a channel with low tissue autofluorescence, then inspect an unstained section and single-label controls before interpreting overlap (general IF practice). Because HSD17B1 is cytosolic and has no transmembrane segment, use permeabilisation suited to access an intracellular epitope after fixation (HPA subcellular; UniProt P14061 topology; general IF practice). Confirm that secondary antibodies distinguish the multiplexed primaries without cross-reactivity (general IF practice). The supplied paraffin IHC caption does not establish an IF fixation or permeabilisation condition (caption PA1613-1).
What should I check if the HSD17B1 section stains diffusely brown?
Check whether background persists when the primary antibody is omitted; staining in that control points toward detection chemistry or tissue background (general IHC practice). The selected image used 10% goat serum blocking, a peroxidase-conjugated secondary and DAB development (caption PA1613-1). Review serum blocking and washing, and include a peroxidase block when using HRP detection (caption PA1613-1; general IHC practice). Compare the background with tissue morphology, since edge staining and damaged areas can exaggerate DAB deposition (general IHC practice). Retain only staining that resolves into plausible cytoplasm within identifiable cells when judging HSD17B1 positivity (UniProt P14061 localisation; general IHC practice).
How should I score HSD17B1 staining across paraffin sections? ⚠ ANSWER MARKED FOR VERIFICATION
Define the cell population and region of interest before scoring, using syncytiotrophoblast cell bodies when assessing the documented placental pattern (HPA tissue IHC; general IHC scoring practice). Record both the percentage of positive cells and cytoplasmic intensity, or calculate an H-score from intensity-weighted percentages on a 0–300 scale (general IHC scoring practice). For area-based analysis, report positive-cell density per mm² of evaluable tissue (general IHC scoring practice). Normalise comparisons to the same eligible cell population or tissue area, and exclude folds, necrosis and section edges (general IHC scoring practice). Keep retrieval, DAB development, imaging and scoring thresholds consistent across batches (general IHC scoring practice).
How can I distinguish genuine HSD17B1 positivity from artefact?
Look for cytoplasmic staining in identifiable cells, especially the documented placental syncytiotrophoblast cell bodies when examining human placenta (UniProt P14061 localisation; HPA tissue IHC). Predominantly nuclear or membrane staining conflicts with the supplied localisation evidence and warrants a specificity check (UniProt P14061 localisation; HPA subcellular). Treat staining concentrated at section edges, tissue folds or necrotic areas cautiously, and compare it with intact interior tissue (general IHC practice). Use a primary-omission control to assess DAB signal from endogenous peroxidase or detection reagents (general IHC practice). Evaluate biological differences only after these controls and comparable processing support the observed cell-specific pattern (general IHC practice).
Boster reagents
Best HSD17B1 / 17-beta-hydroxysteroid dehydrogenase type 1 IHC Antibodies
Anti-HSD17B1 antibodies have paraffin-section IHC images from human placenta and rat liver and ovary (catalog IHC captions), plus fluorescence ICC data from U20S cells (A02198 IF caption).
Real IHC data
Anti-HSD17B1 Antibody ®
Cat # PA1613-1
Real IHC data
Anti-HSD17B1 Antibody ®
Cat # A02198
PA1613-1 has IHC images from rat liver, rat ovary, and human placenta paraffin sections, and an ICC image from Hela cells developed with DAB (catalog image captions). A02198 has an IHC image from a human placenta paraffin section and a fluorescence ICC image from U20S cells (catalog image captions).
Which to pick: For human placenta paraffin-section IHC, either SKU has an IHC image; for rat tissue IHC or human–rat coverage, choose PA1613-1 (PA1613-1 IHC captions; catalog reactivity: Human, Rat). For fluorescence IF/ICC, choose A02198 (catalog applications: IF, ICC; A02198 IF caption: fluorescent secondary and DAPI); PA1613-1’s ICC image uses DAB (PA1613-1 ICC caption). Both IHC captions specify paraffin sections, while the fixative is unreported (catalog IHC captions).
Each figure is that product's own IHC / IF validation image from its datasheet.
References
- UniProt Consortium. UniProt entry P14061 (DHB1_HUMAN, 17-beta-hydroxysteroid dehydrogenase type 1).
- Human Protein Atlas. HSD17B1 tissue IHC expression (reliability: Enhanced).
- Human Protein Atlas. HSD17B1 subcellular location (ICC-IF): Localized to the cytosol..
- Human Protein Atlas. HSD17B1 antibody validation summary (2 antibodies).
- 17β-Hydroxysteroid dehydrogenase type I and aromatase in ovarian cortical inclusion cysts. Endocrine connections 2025 — PMC11906145.
- Site-Specific Regulation of Sulfatase and Aromatase Pathways for Estrogen Production in Endometriosis. Frontiers in molecular biosciences 2022 — PMC9110888.
- The Significance of the Sulfatase Pathway for Local Estrogen Formation in Endometrial Cancer. Frontiers in pharmacology 2017 — PMC5481366.
- Steroidogenic Capacity of Ovarian Interstitial Tissue in the Koala (Phascolarctos cinereus): Morphological and Immunohistochemical Evidence. Biology 2025 — PMC12785116.
- PubMed PMID:2846351 — UniProt-cited evidence.
- PubMed PMID:2779584 — UniProt-cited evidence.
- PubMed PMID:2330005 — UniProt-cited evidence.
Immunohistochemistry protocol sheet for HSD17B1 (17-beta-hydroxysteroid dehydrogenase type 1). Expected localisation Cytoplasmic in placental trophoblasts (HPA tissue IHC). Antigen retrieval: EDTA pH 8.0 HIER, heat-mediated (datasheet PA1613-1). Validated IHC antibody: PA1613-1 at 0.5-1μg/ml (the product's own IHC validation image is shown). Controls (HPA): positive Placenta (Syncytiotrophoblasts - cell body); negative Adipose tissue. IHC-P workflow on paraffin sections; fixative unspecified. Protocol steps: 1. Sample: Paraffin-embedded Rat Liver tissue; fixative not specified (datasheet PA1613-1); 2. Fixation: Image fixative and duration unreported (datasheet PA1613-1); 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 retrieval: EDTA pH 8.0 (datasheet PA1613-1); 20 min, 95–100 °C (standard); 6. Peroxidase block: 3% H2O2, 10 min , room temperature (standard); 7. Blocking: 10% goat serum (datasheet PA1613-1); 8. Primary antibody: Rabbit anti-HSD17B1, 0.5-1μg/ml (datasheet PA1613-1); 9. Primary incubation: Overnight at 4 °C (datasheet PA1613-1). Watch for: Fixation: Matched tissue-IHC evidence does not establish the fixation claim. Validate the specimen-specific method before use. (selected-SKU IHC image PA1613-1); Caveat: Trophoblast content can affect overall section signal (HPA tissue IHC); Isoform / epitope: No isoforms annotated; aa 2–328 chain, no extracellular domain (UniProt); Regulation: Placenta-enriched expression (HPA tissue RNA). Evidence: UniProt P14061, HPA tissue IHC · Enhanced, HPA ICC-IF · cytosol., Datasheet PA1613-1, PMC11906145, PMC9110888. QR code links to https://www.bosterbio.com/bosterbio-gene-info-cards/HSD17B1/immunohistochemistry-ihc-guide.