Complex sentence: Since it's creation, the database has expanded rapidly, and in 2010 contained information from 1,500,000 experiments performed, encompassing 13,423 genes in almost 370,000 tumours and describing over 90,000 mutations.
Split into simpler sentences: Since it's creation, the database has expanded rapidly. In 2010 it contained information from 1,500,000 experiments performed, encompassing 13,423 genes in almost 370,000 tumours and describing over 90,000 mutations.