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.
Report Abuse. The causes of genetic mutation is by radiation, chemicals, outside factors, the cell itself, cancer, and etc. Mutations can be spontaneous or induced. Spontaneous and induced mutations can cause permanent changes in DNA.he causes of genetic mutation is by radiation, chemicals, outside factors, the cell itself, cancer, and etc. Mutations can be spontaneous or induced.