Want to buy a tissue chip containing multiple cancer types and normal controls for antibody preliminary screening? Is there any in stock?

It is not recommended to memorize the specific item number, as the agent's inventory will change. A cost-effective approach is to select a common cancer type + normal control of the finished screening chip, the dot diameter is 1.5mm, 2 points per case is sufficient for initial screening; if the existing product number lacks normal pairing, a normal organ control chip can be added, and the total price is often lower than customized. Prefer batches with validated IHC data or references and require wax block thickness (typically 5-10mm) and slice thickness (4μm). The price is calculated by points, including data sheets and HE tablets; domestic products are usually lower than imports, and the customized markup is obvious. Before placing an order, confirm whether you can buy 1-2 trial tablets to reduce the risk of failure of the whole block.

Antibody preliminary screening is recommended to give priority to 1.5mm point diameter, repeat point ≥ 2 in each case, and multi-cancer products with adjacent cancer or normal control. Do not only ask for the product number when making an inquiry, let the sales provide QC documents, dot plots, HE staining tablets, and IHC positive control data to confirm whether the points of lung cancer, breast cancer, and colorectal cancer are from the same case of tumor and normal pairing. Common spot imports such as US Biomax, Pantomics multi-cancer chips, domestic such as Xinchao, Outdo also have finished products; imported spot is generally 3-7 days, domestic 1-3 days delivery, futures 2-4 weeks. With a limited budget, you can buy 50-100 small screening tablets first, not a large array.

If the cost of ready-in-stock multi-cancer paired arrays is relatively high, you can use a multi-cancer tumor array paired separately with a normal tissue array, or select single-cancer paired arrays from the same supplier for initial screening. This offers greater flexibility and keeps the budget manageable. It is important to note that the normal controls should not simply be normal tissue from the same organ, but rather adjacent-to-tumor or distant normal tissue; some arrays mix normal tissue from different individuals, which may mislead IHC initial screening. For pricing and turnaround time, it is recommended to email 2–3 suppliers directly with your requirements including spot diameter, number of replicate spots, and cancer types, and ask sales to provide a quotation with inventory status and representative HE images—this is more effective than simply searching for catalog numbers.

Most spot inventories have a lead time within 1 week, but if full pairing across three cancer types with replicate spots ≥2 is specified, note that some items listed as in stock are actually semi-custom and require waiting for wax block assembly or sectioning, potentially 2–3 weeks. Upon receipt, bake the slides and deparaffinize for HE review as soon as possible to check whether the spot array is intact, observe for missing spots, displacement, and whether normal controls correspond correctly. For wax block thickness and spot diameter, you may ask the supplier for microtome setting recommendations. Regarding cost-effectiveness, first perform test staining on a small sample to confirm that antigen expression and background are acceptable before deciding whether to purchase a whole block. Laboratories with limited budgets can compare prices from multiple vendors, focusing on the cost per valid spot rather than the list price per whole slide.