Searching for human tissues in bio-banks
Histalim carries out cross-reactivity studies relating to a therapeutic antibody for human use on tissue sections. This service which is critical for the development of therapeutic monoclonal antibodies, makes it possible to highlight unwanted interactions (toxicity) of antibodies with previously characterized tissues. This type of study can be performed on healthy human tissues in GLP (good laboratory practice) conditions.
Optimization and validation of labelling:Our studies always make use of standardized labelling protocols by automated means. To do this, our activities related to immunohistochemistry are carried out on Roche Ventana Discovery and Benchmark automated systems. The protocols are adapted and then validated on the basis of the specificity of the labelling with respect to tissues characterized as positive and negative for the pathology of interest (by paraffin-embedding and freezing).
Preliminary study:A preliminary study on the regulatory test often makes it possible to obtain crucial information regarding the project. We therefore offer tailor-made reactivity and cross-reactivity studies in order to obtain quick results on an antibody to be studied. These tests can be performed on:
- Tissue MicroArray (TMA) slides
- Tumor tissue panels
- Healthy tissue panels
- Animal tissues
- Human tissues
- Cohorts of tailor-made tissues
Regulatory study:This regulatory step in GLP conditions is necessary for the establishment of the preclinical record of a therapeutic antibody. Also, we offer to perform this phase in human tissue in GLP conditions.
The organ panel (frozen) recommended by the FDA to study the cross-reactivity of a monoclonal antibody is as follows (3 donors per organ):
|Tonsil||Smooth muscle||Kidney (glomerulus, tubule)|
|Brain: the cerebellum||Striated muscle (skeletal)||Blood (blood cells)|
|Brain cortex||Spinal cord||Breasts (with the mammary gland)|
|Heart (aorta)||Bone marrow||Testicles|
|Stomach||Ovary||Gastrointestinal tract (esophagus, jejunum, ileum, duodenum)|
|Liver||Oviduct (fallopian tube)||Ureter|
|Lymph node||Pancreas||Uterus: cervix|
|Parathyroid gland||Skin||Uterus: endometrial|
|Salivary gland (sublingual, submandibular, parotid)||Placenta||Blood vessels / endothelium|
|Pituitary gland (pituitary)||Lung||Bladder|
Our repositories :
We have at our disposal the complete collection of human tissues, characterized by HE and CD31 staining, to perform cross-reactivity studies in GLP conditions (come to see our blades labeled CD31).
Our achievements are consistent with FDA (Food and Drug Administration) and the EMA (European Medicines Agency) requirements.
TCR-ENLook at our presentation leaflet on the Tissue Cross Reactivity