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ARHGDIA / Rho GDP-dissociation inhibitor 1 · IHC design guide
Design Immunohistochemistry for ARHGDIA
Plan ARHGDIA chromogenic IHC around cytoplasmic staining, with glandular cells and lung macrophages as high-staining examples (HPA tissue IHC). This guide covers fixation consistency and cell-level scoring (standard IHC practice), alongside the catalog antibody’s 1:100–1:300 IHC dilution (datasheet: A03135-1).
Evidence assembled Oct 2026 · For research use; verify linked source records and product datasheet before use
ARHGDIA 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 staining in tissue sections (HPA tissue IHC) | |
| Staining pattern | High cytoplasmic staining in glandular cells and lung macrophages (HPA tissue IHC) | |
| Antigen retrieval | Citrate pH 6.0 HIER, 95–98 °C, 20 min (rule: cytoplasmic / membrane antigen) | |
| Positive control | Appendix+4 more · see all | |
| Negative control | None in HPA (detected in all 45 tissues); use no-primary + isotype controls |
Important caveats
Reasons your staining may differ from the expected pattern.
| Fixation | Keep fixation consistent across sections. (standard IHC practice; not target-specific) | |
| Caveat | Staining and RNA expression show only medium consistency (HPA tissue IHC) | |
| Regulation | No expression regulator annotated (UniProt) | |
| Isoform / epitope | 2 isoforms; mature chain starts at aa 2; epitope impact unknown (UniProt) |
Section 1
Recommended ARHGDIA IHC & IF Protocols
The catalog antibody’s IHC-P protocol is accompanied by 3 published ARHGDIA paraffin-section methods (PMC4991396; PMC5250662; PMC3445469).
| Sample | Paraffin-embedded human cervix carcinoma tissue; fixative not specified (datasheet A03135-1) |
| Fixation | Image fixative and duration unreported (datasheet A03135-1); 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-ARHGDIA, 1:100 - 1:300 (datasheet A03135-1) |
| 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 | ARHGDIA-positive staining in glandular cells of appendix (HPA tissue IHC: High). HPA tissue profile: Ubiquitous cytoplasmic expression. No signal in the no-primary control. |
💡Decision noteStart with citrate pH 6.0 HIER at 95–98 °C for 20 min (page retrieval rule); PMC3445469 reports microwave sodium citrate retrieval for 20 min.
Section 2
What Is the Expected ARHGDIA Staining Pattern?
ARHGDIA should produce predominantly cytoplasmic staining across many cell types, with strong examples in lung macrophages and several glandular populations (UniProt P52565: cytoplasm; HPA: ubiquitous cytoplasmic expression; HPA: High in lung macrophages). It has no transmembrane segment, so a membrane-only pattern needs scrutiny (UniProt P52565: no transmembrane segment). HPA rates its tissue IHC profile Approved, with medium consistency between staining and RNA expression (HPA: reliability description).
| Cytoplasmic color in lung macrophages and pancreatic exocrine glandular cells, with visible cell boundaries. | This fits the expected compartment and two High tissue examples (UniProt P52565: cytoplasm; HPA: High in lung macrophages and pancreatic exocrine glandular cells). Judge intensity within the identified cells; widespread expression means staining elsewhere can also be genuine (HPA: ubiquitous cytoplasmic expression). |
| Strong signal confined to nuclei or cell membranes, with little cytoplasmic color. | That distribution conflicts with the supported cytoplasmic localization and lacks a transmembrane explanation (UniProt P52565: cytoplasm; UniProt P52565: no transmembrane segment). Treat it as a localization warning; inspect morphology and controls before assigning the signal to ARHGDIA (standard IHC practice). |
| The dominant signal is in an unexpected cell population while expected positive cells are faint. | Check cell identity and controls before calling cross-reactivity or endogenous detection activity (standard IHC practice). HPA reports High lung macrophage staining but Low respiratory epithelial staining in bronchus; those are observations from different tissue entries, not a universal cell-type exclusion rule (HPA: tissue IHC). |
| Diffuse color covers extracellular space, section edges, and cells without clear cytoplasmic boundaries. | This does not resolve the reported cytoplasmic pattern (HPA: ubiquitous cytoplasmic expression). Uneven reagent coverage, nonspecific binding, or incomplete removal of detection reagents can cause broad background; use controls and the slide's morphology to locate its source (standard IHC practice). |
| No convincing cytoplasmic signal in a section containing lung macrophages or thyroid glandular cells. | Both are High HPA examples, so absence there warrants a run-level check (HPA: High in lung macrophages and thyroid glandular cells). Confirm that the expected cells are present and that the detection controls worked before interpreting the section as biologically negative (standard IHC practice). |
💡Expected ARHGDIA appearanceCall a positive result when identifiable glandular cells or lung macrophages show clear, predominantly cytoplasmic staining, potentially High in the listed HPA examples; isolated nuclear or membrane-only color is suspect (HPA: tissue IHC; UniProt P52565: cytoplasm and no transmembrane segment).
| Tissue and cell selection | HPA lists High staining in appendix, cervix, gallbladder, pancreas and thyroid glandular populations, lung macrophages, and testis Leydig cells; stomach glandular cells are Medium (HPA: tissue IHC). These are observed examples, not mandatory intensities for every specimen. |
| Comparator choice | HPA lists Low staining in bronchus respiratory epithelium, oral squamous epithelium, rectal glandular cells, liver cholangiocytes, cardiomyocytes, and skeletal myocytes (HPA: tissue IHC). Its negative list is empty; a Low entry should not be treated as a proven zero-signal control. |
| Antibody evidence | HPA marks HPA021407 and CAB010005 IHC Approved; its overall tissue profile has medium consistency with RNA expression (HPA: antibody validation; HPA: reliability description). Approval supports using the reported pattern as a reference, while discordant staining still needs local controls. |
| Isoforms and epitope limits | UniProt records 2 isoforms and no annotated domain, but the supplied records do not map the IHC antibody epitope or establish isoform-specific staining (UniProt P52565: isoforms and domains; HPA: antibody list). Interpret the observed compartment without assigning an isoform. |
| Does ICC-IF show the same compartment? | Yes: HPA supports cytosol localization in ICC-IF and lists images from A-431, U-251MG, and U2OS (HPA: subcellular). CAB010005 is ICC Supported, while HPA021407 has no supplied ICC rating (HPA: antibody validation). This informs localization; ICC-IF has its own guide. |
| Situation | Likely cause | Next action |
|---|---|---|
| High-example tissue is blank. | The expected cells may be absent from the section, or a staining step may have failed (HPA: High tissue examples; standard IHC practice). | Verify cell identity on the counterstain, then check the run's positive and detection controls before changing interpretation (standard IHC practice). |
| Color is mainly nuclear or membrane-only. | The pattern disagrees with cytoplasmic ARHGDIA localization; nonspecific staining is possible (UniProt P52565: cytoplasm and no transmembrane segment; standard IHC practice). | Review the same cells at higher magnification and compare control sections before scoring the color as ARHGDIA (standard IHC practice). |
| Macrophages and surrounding structures stain similarly. | Broad background may obscure the cell-specific HPA example (HPA: High in lung macrophages; standard IHC practice). | Confirm macrophage morphology and inspect negative reagent controls; score only color that can be assigned to intact cells (standard IHC practice). |
| Diffuse brown color persists outside cells. | Endogenous peroxidase or nonspecific chromogen deposition can mimic signal in chromogenic IHC (standard IHC practice). | Check the detection-only control and whether routine endogenous activity blocking and washes were performed (standard IHC practice). |
| A Low HPA comparator stains visibly. | Low denotes reported weak staining, not a guaranteed negative result (HPA: Low tissue entries). | Compare its cytoplasmic distribution and relative intensity with a High HPA example; do not reject the run solely because the comparator has color (HPA: tissue IHC; standard IHC practice). |
| Results differ between specimens or antibody runs. | HPA reports medium consistency between tissue staining and RNA expression, so its profile is a reference with limits (HPA: reliability description). | Compare like cell populations, review controls and scoring criteria, and record the observed compartment and intensity for each specimen (standard IHC practice). |
Experiment evidence
IHC & IF images showing ARHGDIA staining
A03135-1 · IHCImmunohistochemistry analysis of paraffin-embedded human cervix carcinoma tissue, using ARHGDIA Antibody. The picture on the right is blocke
HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000141522-ARHGDIA/tissue/cerebral+cortex#imid_3812784
HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000141522-ARHGDIA/tissue/colon#imid_3812710
HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000141522-ARHGDIA/tissue/liver#imid_3812727
HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000141522-ARHGDIA/tissue/kidney#imid_3812712
HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody CAB010005; green = ARHGDIA, blue = nucleus, red = microtubules.
HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody CAB010005; green = ARHGDIA, blue = nucleus, red = microtubules.
← swipe / scroll for more images →
Real IHC / IF data behind the staining-pattern expectations in this section.
Sample controls for ARHGDIA IHC & IF
🧪Run cervix first and look for cytoplasmic staining in glandular cells (HPA: High in cervix glandular cells; UniProt P52565: cytoplasm). HPA detects ARHGDIA in all 45 scored tissues, so there is no supported negative tissue; use no-primary and isotype controls, and treat cells without cytoplasmic staining above background on the positive slide as internal background comparators rather than validated negative cells (HPA: detected in all 45 tissues).
Positive control tissue: Appendix (Glandular cells, HPA High)
Negative control tissue: None in HPA: ARHGDIA is detected in all 45 scored tissues. Use a no-primary (secondary-only) and an isotype control instead.
ICC-IF cell lines (HPA subcellular resource): HPA ICC-IF images show ARHGDIA in A-431, U-251MG, U2OS, with annotated localisation: Cytosol (supported) (HPA subcellular).
Technical controls: Include a no-primary, secondary-only slide and a concentration-matched isotype control appropriate to the primary antibody’s host species and clonality (standard IHC practice). Use peptide blocking as a biological specificity control for the catalog antibody (selected SKU A03135-1 caption: peptide-blocked cervix carcinoma image), and quench endogenous peroxidase for chromogenic detection; assess endogenous biotin if using avidin–biotin detection (standard IHC practice).
⚠️Feasibility: The selected SKU A03135-1 caption shows paraffin-section cervix carcinoma IHC but does not report its fixative; no target-specific fixation window or fixation effect is reported in the supplied evidence. Antigen retrieval requirements therefore need empirical optimization, and the evidence does not establish whether frozen sections or IF are easier than paraffin IHC (selected SKU A03135-1 caption; HPA: cytosol supported in ICC-IF). In cervix glandular tissue, check luminal material and tissue edges for nonspecific chromogen before scoring cytoplasmic signal (standard IHC practice; HPA: High in cervix glandular cells).
HPA tissue IHC evidence for ARHGDIA
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Approved — 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.
Positive expression · recommended positive controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Appendix | Glandular cells | High | Protein (IHC) | HPA → |
| Cervix | Glandular cells | High | Protein (IHC) | HPA → |
| Gallbladder | Glandular cells | High | Protein (IHC) | HPA → |
| Lung | Macrophages | High | Protein (IHC) | HPA → |
| Pancreas | Exocrine glandular cells | High | Protein (IHC) | HPA → |
Undetected expression · recommended negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| None in HPA: ARHGDIA is detected in all 45 scored tissues. Use a no-primary (secondary-only) and an isotype control instead. | ||||
Section 3
Advanced ARHGDIA IHC Tips
Troubleshoot ARHGDIA staining in paraffin sections by checking retrieval, cytoplasmic localisation, controls and cell-specific scoring (UniProt P52565; HPA tissue IHC).
What retrieval conditions should I start with for weak ARHGDIA staining?
Use citrate pH 6.0 heat-induced epitope retrieval at 95–98 °C for 20 min for paraffin-section ARHGDIA IHC (page retrieval rule). Allow sections to cool in the retrieval buffer, then wash consistently before blocking and applying the primary antibody (general IHC practice). Compare a reference section processed in the same run, because changes in heating or cooling can change chromogenic signal (general IHC practice). If cytoplasmic staining remains weak, check tissue preservation and antibody incubation before trialling an alternative retrieval buffer on matched sections (UniProt P52565 subcellular location; general IHC practice).
Could fixation explain inconsistent ARHGDIA staining between paraffin blocks?
ARHGDIA-specific sensitivity to fixation is unknown from the supplied evidence; the catalog image identifies paraffin-embedded cervix carcinoma but does not state its fixative (A03135-1 caption). Record the fixative, fixation duration and processing history for each block before attributing different staining intensities to biology (general IHC practice). Run comparison sections together with the same pH 6.0, 95–98 °C, 20 min retrieval and detection conditions (page retrieval rule; general IHC practice). Include a consistent reference tissue and assess morphology alongside signal, since processing differences can confound interpretation of chromogenic staining (general IHC practice).
How should I assess membrane-like or nuclear ARHGDIA staining?
Prioritise diffuse or granular cytoplasmic staining when assessing ARHGDIA in paraffin sections (UniProt P52565 subcellular location; HPA: ubiquitous cytoplasmic expression). A crisp membrane rim or predominantly nuclear signal needs additional scrutiny because ARHGDIA has no annotated transmembrane segment and its supported location is cytosol (UniProt P52565 topology; HPA subcellular). Compare the questionable pattern with adjacent well-preserved cells and a no-primary control at the same detection settings (general IHC practice). Its interactions with Rho proteins and membrane extraction function do not, by themselves, establish that a membrane-like chromogenic pattern is specific (UniProt P52565 function and subunit; general IHC interpretation).
Can this IHC result distinguish ARHGDIA isoforms or modified epitopes?
Do not assign a paraffin-section staining difference to one isoform without an epitope map or isoform-specific validation (UniProt P52565: 2 isoforms; general IHC practice). The supplied record lists phosphorylation at Ser34 and Ser47 and acetylation at Lys43 and Lys105, but supplies no antibody epitope or modification-specific claim (UniProt P52565 modified residues; supplied product evidence). Peptide blocking in the catalog cervix carcinoma image supports competition by its synthesized peptide under those image conditions, not isoform discrimination (A03135-1 caption; general IHC interpretation). For a modification-specific question, use an independently validated reagent and matched controls before comparing staining across sections (general IHC practice).
How can I cross-check ARHGDIA IHC localisation by multiplex immunofluorescence?
Treat IF as a separate assay: the supplied catalog image documents paraffin-section IHC, while the HPA reports cytosolic localisation from ICC/IF images (A03135-1 caption; HPA subcellular). Multiplex ARHGDIA with an independently validated marker for the expected cell population, such as lung macrophages, and assess cytosolic overlap within identified cells (HPA: high in lung macrophages; general IF practice). Choose a far-red fluorophore where tissue autofluorescence is troublesome and include single-label and no-primary controls (general IF practice). Because ARHGDIA is cytosolic and lacks a transmembrane segment, optimise permeabilisation for intracellular access while checking that cell boundaries remain interpretable (UniProt P52565 topology; HPA subcellular; general IF practice).
How do I distinguish widespread ARHGDIA expression from chromogenic background?
A broadly positive cytoplasmic pattern is plausible because HPA describes ubiquitous cytoplasmic expression, so an entirely unstained tissue is a poor required negative control (HPA tissue IHC). Compare cells reported as high, such as cervix glandular cells, with lower-signal populations such as oral mucosa squamous epithelial cells on appropriately matched sections (HPA tissue IHC). Include a no-primary control and a peroxidase block before DAB development to reveal detection-related staining (general chromogenic IHC practice). The catalog peptide-blocked cervix carcinoma image provides a product-specific competition check, but examine edge deposits, pigment and necrotic areas separately from intact-cell cytoplasm (A03135-1 caption; general IHC practice).
What should I score when comparing ARHGDIA across IHC sections? ⚠ ANSWER MARKED FOR VERIFICATION
Score cytoplasmic signal within a defined cell population and tissue region, rather than averaging unlike cells across the section (UniProt P52565 subcellular location; general IHC practice). An H-score combines the percentage of cells at each intensity grade, 0–3, into a 0–300 score; record the percentage positive as a companion measure (general IHC practice). For spatial counts, report positive cells per mm² of viable analysed tissue and document excluded necrotic or folded areas (general IHC practice). Normalise comparisons to the same cell type, section area, scoring thresholds and staining run, with a reference section for run-to-run variation (general IHC practice).
When is an apparent ARHGDIA-positive region likely to be artefact?
Give most weight to staining in intact-cell cytoplasm, the expected compartment for ARHGDIA (UniProt P52565 subcellular location; HPA subcellular). High signal in lung macrophages or cervix glandular cells has supporting tissue context, whereas unexpected nuclear-only staining needs independent confirmation (HPA tissue IHC; HPA subcellular; general IHC interpretation). Inspect section edges, folds and necrotic regions for staining that follows damage or reagent pooling rather than cell boundaries (general IHC practice). If brown signal persists without primary antibody, investigate endogenous peroxidase or detection background before calling those cells positive (general chromogenic IHC practice). HPA rates its tissue staining Approved with medium RNA–protein consistency, so interpret modest differences with matched controls (HPA tissue IHC).
Boster reagents
Best ARHGDIA / Rho GDP-dissociation inhibitor 1 IHC Antibodies
A03135-1 has an IHC image from paraffin-embedded human cervix carcinoma (A03135-1 IHC caption). IF/ICC and human, mouse, and rat reactivity are listed (A03135-1 catalog).
Real IHC data
Anti-ARHGDIA/Rhogdi Antibody
Cat # A03135-1
A03135-1 is the only SKU with a supplied IHC figure: paraffin-embedded human cervix carcinoma with peptide blocking (A03135-1 IHC caption). Its listed applications include IHC, IF, and ICC, with human, mouse, and rat reactivity; no IF image is supplied (A03135-1 catalog).
Which to pick: For tissue IHC, choose A03135-1: its own figure documents paraffin-embedded human cervix carcinoma, while the fixative is unreported (A03135-1 IHC caption). For IF/ICC or cross-species work, A03135-1 is a rabbit polyclonal listed for those applications and for human, mouse, and rat; its figure establishes only the pictured human tissue result (A03135-1 catalog; A03135-1 IHC caption). M03135-2 is a rabbit monoclonal, clone 19A54, with the same listed species and IHC/IF/ICC applications, but no supplied IHC or IF figure to support a sample-specific recommendation (M03135-2 catalog).
Each figure is that product's own IHC / IF validation image from its datasheet.
References
- UniProt Consortium. UniProt entry P52565 (GDIR1_HUMAN, Rho GDP-dissociation inhibitor 1).
- Human Protein Atlas. ARHGDIA tissue IHC expression (reliability: Approved).
- Human Protein Atlas. ARHGDIA subcellular location (ICC-IF): Localized to the cytosol..
- Human Protein Atlas. ARHGDIA antibody validation summary (2 antibodies).
- Interplay between PCBP2 and miRNA modulates ARHGDIA expression and function in glioma migration and invasion. Oncotarget 2016 — PMC4991396.
- Downregulation of ARHGDIA contributes to human glioma progression through activation of Rho GTPase signaling pathway. Tumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine 2016 — PMC5250662.
- Proteomic analysis of adrenocorticotropic hormone treatment of an infantile spasm model induced by N-methyl-D-aspartic acid and prenatal stress. PloS one 2012 — PMC3445469.
- PubMed PMID:8262133 — UniProt-cited evidence.
- PubMed PMID:14702039 — UniProt-cited evidence.
- PubMed PMID:16625196 — UniProt-cited evidence.
Immunohistochemistry protocol sheet for ARHGDIA (Rho GDP-dissociation inhibitor 1). Expected localisation Cytoplasmic staining in tissue sections (HPA tissue IHC). Antigen retrieval: Citrate pH 6.0 HIER, 95–98 °C, 20 min (rule: cytoplasmic / membrane antigen). Validated IHC antibody: A03135-1 at 1:100 - 1:300 (the product's own IHC validation image is shown). Controls (HPA): positive Appendix (Glandular cells); negative None in HPA (detected in all 45 tissues); use no-primary + isotype controls. IHC-P workflow on paraffin sections; fixative unspecified. Protocol steps: 1. Sample: Paraffin-embedded human cervix carcinoma tissue; fixative not specified (datasheet A03135-1); 2. Fixation: Image fixative and duration unreported (datasheet A03135-1); 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-induced epitope retrieval in citrate buffer, pH 6.0 , 20 min at 95–98 °C…; 6. Peroxidase block: 3% H2O2, 10 min , room temperature (standard); 7. Blocking: 10% normal serum of the secondary host, 30 min , room temperature (standard); 8. Primary antibody: Rabbit anti-ARHGDIA, 1:100 - 1:300 (datasheet A03135-1); 9. Primary incubation: Overnight at 4 °C (standard). Watch for: Fixation: Keep fixation consistent across sections. (standard IHC practice; not target-specific); Caveat: Staining and RNA expression show only medium consistency (HPA tissue IHC); Isoform / epitope: 2 isoforms; mature chain starts at aa 2 ; epitope impact unknown (UniProt); Regulation: No expression regulator annotated (UniProt). Evidence: UniProt P52565, HPA tissue IHC · Approved, HPA ICC-IF · cytosol., Datasheet A03135-1, PMC4991396, PMC5250662. QR code links to https://www.bosterbio.com/bosterbio-gene-info-cards/ARHGDIA/immunohistochemistry-ihc-guide.