Professor Francisco José Sáez graduated in 1990 with a Ph.D. in biology at the University of Alcalá (Spain). After a position as a Postdoc at Paris (France) and Senior Lecturer in Cell Biology at the University of the Basque Country UPV/EHU (Spain), he is since 2007 Professor of Histology at UPV/EHU (Spain). His work focuses on spermatogenesis and early embryos. At present, Prof. Sáez is integrated in the Signaling Lab of the UPV/EHU and his projects focus on the role of proprotein convertases of the testis in the context of cancer. For more than thirty years, he has been teaching cell biology, developmental biology and histology for degrees in biology, biochemistry, medicine and dentistry. He is a member of the board of the Spanish Society of Histology and Tissue Engineering (SEHIT) and a member of the editorial board of the journal Histology and Histopathology. Professor Iker Badiola graduated in 2001 with a Ph.D. in biology at the University of the Basque Country UPV/EHU (Spain). After position as Senior Lecturer in Cell Biology at the UPV/EHU, he is since 2024 Professor of Histology at the same university. His work focuses on cancer research. Prof. Badiola is the leader of the cancer division in the Signaling Lab of the UPV/EHU and is involved in the study of tumor microenvironment in liver metastasis. He has been teaching cell biology and histology for degrees in medicine, physiotherapy and dentistry. He is the founder of the biotechnology companies Innoprot SL and Nanokide Therapeutics SL.