What is TIGIT clone TG1?
TG1 is a mouse monoclonal antibody against human TIGIT (catalog number DIA-TG1-M), used as a research reagent. Clone-specifically published applications include IHC on FFPE tissue, brightfield IHC and fluorescence multiplex IHC.
Is TG1 used for IHC on human FFPE tissue?
Yes. Multiple peer-reviewed publications explicitly name TG1 or DIA-TG1 and document its use on human FFPE material.
Which dilution is recommended for TG1?
The documented IHC starting range is 1:50 to 1:150 (1:50 for biotin/streptavidin-based detection, 1:100 to 1:150 for polymer-based detection). Published conditions range from 1:25 to 1:150 depending on study and method. Each laboratory must validate the optimal condition for its own workflow.
Which epitope retrieval does TG1 require?
Heat-induced epitope retrieval is required. Stringent heat pretreatment is recommended in an autoclave at 121 °C for 5 minutes in Tris-EDTA-citrate buffer, pH 7.8 (TEC buffer); the documented Leica Bond RX protocol uses high-pH retrieval (ER2, pH 9.0, 100 °C, 20 min).
Has TG1 been used on automated IHC platforms?
Yes. A Leica Bond RX protocol is documented in Tech Note V1. Independent peer-reviewed studies additionally report use on the Dako Autostainer Link 48 and Agilent Omnis. Conditions from these sources are starting points and must be validated locally.
How is a TG1 stain evaluated?
TG1 stains cell membranes of various lymphocyte subtypes; this membranous signal is scored as TIGIT positivity. Tonsil is the recommended positive control and should be run in parallel with a negative control.
Has TG1 been used in multiplex immunofluorescence?
Yes. TG1 has been used in peer-reviewed fluorescence multiplex IHC studies. Published conditions apply to the respective experimental setups and must be re-optimized when transferred to other systems.
How does TG1 differ from TG2?
TG1 and TG2 are two separate mouse monoclonal hybridoma clones against human TIGIT with separate catalog numbers (DIA-TG1-M and DIA-TG2-M). TG1 is the clone-specifically published clone: twelve peer-reviewed references are documented for it, and it carries RRID AB_3750391. TG2 is documented by its own datasheet, and shows higher affinity, stronger tonsil staining intensity and higher dilutability compared with TG1 (documented on the TG2 page).
Which publications used TIGIT clone TG1?
Twelve peer-reviewed references are documented for clone TG1, covering lymphatic tissue, inflammation and cancer (Blessin 2019), Hodgkin lymphoma (Li 2018; Annibali 2021), seminoma (Hinsch 2019), gallbladder cancer (Albrecht 2021), non-small cell lung cancer (Mori 2023), cutaneous squamous cell carcinoma and keratoacanthoma (Lonsdorf 2024), Merkel cell carcinoma (Toberer 2025), colorectal cancer (Murakami 2022), melanoma (Niebel 2022), uveal melanoma (Koch 2025) and prostate cancer (Scimeca 2019). Eleven of them used clone TG1 (DIA-TG1); Scimeca et al. 2019 is listed in ONCOdianova datasheet V17 under “References for clone TG1”. The full list with DOI and PMID is in the publications section of this page.
What positive control tissue is documented for TG1?
Human tonsil. Tonsil is the documented positive control, and a published study additionally used tonsil germinal centers as positive control on an automated platform.
What staining pattern is reported for TG1?
A membranous staining pattern of various lymphocyte subtypes. In the published TMA study, TIGIT was detected with TG1 in CD8+, CD4+ and FOXP3+ T cells and NK cells, but not in B cells, macrophages or dendritic cells.
Does TG1 have an RRID?
Yes. The Research Resource Identifier is AB_3750391, assigned to product DIA-TG1-M, clone TG1.