Human endogenous retroviruses and neurologic disorders
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Human endogenous retroviruses (HERVs) are fossil viruses that began to be assimilated into the human genome some 30~40 million years ago, and now constitute nearly 8% of the human genome. These ancient retroviruses have since accumulated mutations that have rendered them defective; thus, they have been termed junk DNA. However, recent research indicates that not all HERVs remain silent passengers. Although they have not been shown to be causative of any human disease, endogenous retroviral sequences may become expressed under select pathological circumstances such as neurological disorders, including multiple sclerosis (MS), schizophrenia, and Amyotrophic Lateral Sclerosis (ALS); viral infections, including human immunodeficiency virus (HIV) and herpesvirus; and multiple types of cancers. This review focused on the possible interactions of HERVs and neurological diseases.
Abstract
Human endogenous retroviruses (HERVs) are fossil viruses that began to be assimilated into the human genome some 30~40 million years ago, and now constitute nearly 8% of the human genome. These ancient retroviruses have since accumulated mutations that have rendered them defective; thus, they have been termed junk DNA. However, recent research indicates that not all HERVs remain silent passengers. Although they have not been shown to be causative of any human disease, endogenous retroviral sequences may become expressed under select pathological circumstances such as neurological disorders, including multiple sclerosis (MS), schizophrenia, and Amyotrophic Lateral Sclerosis (ALS); viral infections, including human immunodeficiency virus (HIV) and herpesvirus; and multiple types of cancers. This review focused on the possible interactions of HERVs and neurological diseases.
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