For custom pathology diagnostic chip development for companion diagnostics, what are the approximate minimum order quantity and turnaround time?

Compliance preparation for clinical samples should be done in advance, including at least: ethics committee approval, patient informed consent or legally exempted documentation, a sample transfer agreement between the sample source institution and your company, and desensitization records. If human genetic resources are involved, it is necessary to determine whether filing or approval is required under the Regulations on the Administration of Human Genetic Resources, especially for cross-border transfer or provision to foreign parties. The manufacturer should provide a commitment regarding the scope of sample use, stating that the samples will be used only for the development and quality control of this chip and must not be used for any other purposes. All documents should preferably be completed before the samples are shipped to avoid missing materials in subsequent audits.

The minimum order quantity for custom companion diagnostic chips varies significantly among different manufacturers. It is generally determined by the number of sample cases and the core point design. Commonly, it can be negotiated starting from 50-200 cases, but ultimately it depends on whether the manufacturer can meet the donor screening requirements for different stages of lung cancer and breast cancer. There are usually two approaches for samples: you provide de-identified FFPE wax blocks or sections, and the manufacturer handles review, punching, and core preparation; or the manufacturer assists in screening samples from their library, but this increases cost and turnaround time. It is recommended to first conduct a process pre-test with 5-10 cases to verify antigen stability and spot design before signing a formal contract.

In terms of timeline, from panel confirmation, sample shipment, pathology review, tissue microarray production to QC delivery, it is generally realistic to allow 6-12 weeks; proteins containing phosphorylation sites have high requirements for antigen preservation, and if sample fixation or preservation is suboptimal, pre-staining and adjustments may be necessary. It is recommended to specify the key milestones clearly in the contract: how many days after panel confirmation the dot map will be produced, customer confirmation required after punching, and shipment only after QC staining passes. Do not accept verbal promises of speed, so as not to affect the progress of registration submission.

It is best to require itemized quotations: sample receipt and pathology review fee, punching/core-making fee per sample, fee per slide, QC staining and scanning fee, and cold-chain transportation fee. Prices will be affected by core diameter, number of replicate cores, and number of slides, so total price alone should not be used for comparison; require clear ownership of intellectual property and whether residual wax blocks will be returned. If future scale-up is needed, it is advisable to stipulate that additional sections can be cut from the same batch of cores to avoid repeated punching. Compare proposals from two or three manufacturers with IVD customer experience; do not focus only on the lowest quotation.