Potential Cause of Pediatric Cancer and Implications for Detection

Introduction

Researchers at the University of Bergen in Norway may have identified a previously unknown cause of pediatric cancer. Their study suggests that autoantibodies, which target essential proteins for DNA repair, could aid in earlier detection of cancer in young children.

The Study

Published in Frontiers in Immunology on October 14, the research found an increased presence of these antibodies in children even years before a cancer diagnosis. While childhood cancer is rare, the more common types include blood cancers like leukemia and lymphoma, as well as cancers of the brain, spinal cord, and bone.

Understanding Autoantibodies

Autoantibodies are a malfunctioning type of antibody. Unlike typical antibodies that protect the body by identifying and destroying threats like viruses, autoantibodies mistakenly target healthy tissues. This error can lead to autoimmune diseases, such as type 1 diabetes, lupus, and multiple sclerosis.

The exact cause of autoantibody production remains unclear, but possible triggers include infections, toxin exposure, or genetic factors.

Research Findings

From 2014 to 2017, researchers analyzed tumor and blood samples from 175 children and adults with sarcoma or acute lymphoblastic leukemia. These samples were compared against those from healthy individuals. The study revealed that children aged 2 to 19 with pediatric cancer had more IgG class antibodies. These antibodies predominantly targeted genes like RAD52, NUMA1, ALKBH7, APBB1, UNG, and MGMT, which are crucial for DNA repair.

Study author Ola Myklebost noted that patient autoantibodies could bind proteins outside the nucleus, hindering their repair function. This disruption elevated mutation rates and cancer risks, as seen in the higher frequency of autoantibodies among schoolchildren later diagnosed with cancer.

Expert Opinions

Dr. Yvonne Saenger from Stony Brook University commented on the importance of understanding differences in immune responses between healthy individuals and cancer patients. Further research is needed to explore the impact of these antibodies on cellular processes.

Implications of the Study

Myklebost proposed that this hypothesis could explain how cancer arises in children and potentially in young adults and sometimes older adults. Confirming the causality and patterns of these autoantibodies could lead to screening children for cancer risks.

Anastassia Serguienko from the University of Bergen emphasized the need to study the biology of penetrating autoantibodies further, highlighting their potential involvement in many human diseases.