Autoimmune hepatitis is a disease in which the bodyâs immune system attacks liver cells of the same organism. This causes the liver to become inflamed, resulting in hepatitis.
1 Gene mutations that occur after birth. 2  Most gene mutations occur after you're born and aren't inherited. 3  A number of forces can cause gene mutations, such as smoking, radiation, viruses, cancer-causing chemicals (carcinogens), obesity, hormones, chronic inflammation and a lack of exercise.
They may cause a frameshift in the reading of the messenger RNA so that the amino acid sequence is incorrect and the protein product is prematurely terminated by encountering a stop codon. Mutations can be caused by defects in DNA replication. DNA repair systems, or they may be the result of environmental mutagens.