Neuropathology characterization for the Brain Atlas Project

Questions & Answers / Clarifications

This document provides responses to vendor questions regarding Solicitation 75N98026Q00313, clarifying requirements and scope.

• Slide Count: The project requires 30 slides per sample for 58 samples, totaling 1740 IHC stained slides. This is distinct from the initial interpretation of 30 slides per sample across 4 antibodies.
• Staining Protocols: The end-user has not established validated staining protocols for the specified antibodies and tissues.
• Slide Format: Standard 1x3" slides will be used.
• Sample Delivery: Samples will be sent in batches weekly, with a 10-business day turnaround expected for pick-ups/deliveries.
• Block and Slide Counts: There are 928 blocks (58 cases x 16 blocks/case). The project requires 928 H&E slides and 1740 IHC stained slides on select blocks (58 cases x 30 IHC per case).
• Tissue Preparation: Paraffin embedding is required; gelatin processing is not acceptable as antibodies have not been validated on gelatin.
• Antibody Provision: The Government will provide all specified antibodies to the Contractor.
• Sample Type: The "58 large multi-piece brain tissue samples" are human autopsy samples from various Central Nervous System (CNS) regions.
• Turnaround Time: The 10-day turnaround is considered reasonable due to rolling submissions of samples.
• Storage Requirements: A minimum of 67TB of storage is required on the vendor's platform, with access for 3 users to view, annotate, snapshot, and download raw files.

These clarifications refine the scope, quantities, and logistical expectations for bidders. Notably, the exact slide and block counts have been clarified, and the requirement for paraffin embedding is confirmed. The government will provide antibodies. No pre-stain optimization is needed, and no future expectations for image analysis or pathologist interpretation are currently stated.

Statement of Work (SOW) / Performance Work Statement (PWS)

To support the National Institute on Aging's (NIA) Brain Atlas project by providing neuropathology services to better understand differences between healthy brains and those affected by Alzheimer's disease at the cellular level. The goal is to aid in the creation of a human brain atlas and investigate cell types in brain regions affected by disease.

• Provide neuropathology services for 58 large, multiple-piece brain samples.

• Tasks include trimming, cassette printing, processing, and wet embedding into paraffin (16 blocks per sample).

• Perform routine hematoxylin and eosin (H&E) staining (16 blocks per sample).

• Conduct chromogenic immunostaining on 30 slides per sample using specified antibodies (Phospho-TDP-42, Phospho-Ser129 alpha-synuclein, Beta-amyloid, Phospho-Tau AT8).

• Perform digital 40x scanning and preserve images for 12 months on the contractor's platform.

• Provide a platform with at least 67TB of storage and access for 3 users to view, annotate, snapshot, and download raw files.

• Provide all slides related to the 58 samples.

• Services to be completed within 5-10 business days after receiving samples.

• Contractor will provide pick-up and delivery from NIH main campus in Bethesda, Maryland.

• Turnaround time: 5-10 business days after receipt of samples.

• Image preservation: 12 months on contractor's platform.

• Reporting: A one-time report documenting samples processing procedures.

• Period of Performance: June 1, 2026 – May 31, 2027.

• Place of Performance: Contractor's work site.

• Contractor must furnish all necessary services, qualified personnel, material, equipment, and facilities.

• Contractor shall provide a dedicated project manager.

• Evaluation Criteria: Lowest Price Technically Acceptable (LPTA). Technical acceptability is Pass/Fail, requiring demonstration of capability to meet all mandatory technical requirements. Price evaluation is only for technically acceptable offers.