Preclinical histology services involve the preparation, examination, and analysis of tissue samples from animal models in the early stages of drug development. These services provide detailed insights into the effects of potential therapeutic compounds on tissue structure and function. By utilizing techniques such as tissue sectioning, staining, and microscopic analysis, preclinical histology helps researchers examine target expression at the level of the tissue of interest, which can aid in appropriate model selection for ex vivo and in vivo studies, and helps understanding the safety and efficacy of new drugs.

Histopathology plays a critical role in preclinical research by providing detailed information about the microscopic structure and pathology of tissues in response to experimental treatments. It helps identify cellular changes, such as inflammation, necrosis, or tumor formation, that occur due to drug exposure. Histopathology is essential for evaluating target expression and assessing the potential toxicity of new compounds and understanding their mechanism of action.

Using preclinical histology services offers several advantages, including:

• Expertise: Access to specialized knowledge and skills in tumor tissue preparation and analysis.
• Advanced Technology: Utilization of state-of-the-art imaging and optimized staining techniques for precise results.
• Efficiency: Outsourcing histology tasks can accelerate project timelines by leveraging dedicated resources.
• Quality Control & Assurance: Ensures consistent and high-quality results that meet regulatory standards, supporting the credibility of preclinical findings.

Histology utilizes various imaging technologies to visualize and analyze tissue samples, including:

• Light Microscopy: Commonly used for examining stained tissue sections at high resolution.
• Fluorescence Microscopy: Allows for the visualization of specific molecules within tissues using fluorescent tags.
• Confocal Microscopy: Provides detailed 3D images of tissues by scanning multiple planes within a sample.
• Electron Microscopy: Offers ultra-high resolution images of tissue ultrastructure, revealing cellular details at the nanometer scale.

Handling and storing tissue samples for histology involves careful procedures to preserve tissue integrity and prevent degradation. Samples are typically fixed in a preservative like formalin shortly after collection to stabilize the tissue structure and then embedded in paraffin wax sectioning. Samples can also be frozen in a compound like OCT that helps preserve the tissue structure and aids in the sectioning. For long-term storage, samples are kept in conditions that prevent moisture and microbial growth, such as in sealed containers at controlled temperatures. Proper labeling and documentation are also critical to maintaining sample integrity and traceability throughout the histology process.