In today’s research, the St. Jude group demonstrated that mice lacking Brca2 experienced neurologic defects comparable to those of human beings with Fanconi anemia who bring the mutated gene. Specifically, the increased loss of Brca2 resulted in defective DNA fix and the accumulation of mutations in the so-known as progenitor cells that provide rise to many parts of the nervous program. This led to small brain size because of apoptosis of the irregular cells. Related StoriesScalable creation of gene therapy vectors: an interview with Frank UbagsSingle gene variation may impact obesity in kids, adultsResearchers determine tumor suppressor genes that travel subset of melanomasThese results demonstrated that the mouse model carefully copied the human features of Fanconi anemia and may become a valuable device for studying the reason and treatment of the disease.Social phobia . This stress is triggered by cultural situations or speaking in front of others. A much less common form called selective mutism causes some kids and teens to be as well fearful to talk at all in certain situations. Anxiety attacks. These episodes of panic may appear for no apparent reason. During a panic attack, a child typically has unexpected and intense physical symptoms that may include a pounding heart, shortness of breath, dizziness, numbness, or tingling feelings. Agoraphobia can be an intense fear of panic attacks that causes a person to avoid heading anywhere a panic attack could possibly occur.