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.
Genetic disorders arise as a result of: 1 genetic mutations: changes in the DNA sequence are caused as a result of exposure to harmful chemicals or radiations. These changesâ¦ in the DNA sequence could lead problems in protein synthesis and cause genetic diseases.