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Frontiers | A Novel Probable Pathogenic PSEN2 Mutation p Phe369Ser Associated With Early-Onset Alzheimer s Disease in a Chinese Han Family: A Case Report

Department of Neurology, The First Affiliated Hospital of Anhui Medical University, Hefei, China The pathogenesis of Alzheimer s disease is complex, and early-onset Alzheimer s disease (EOAD) is mostly influenced by genetic factors. Presenilin-1, presenilin-2 (PSEN2), and amyloid precursor protein are currently known as the three main causative genes for autosomal dominant EOAD, with the PSEN2 mutation being the rarest. In this study, we reported a 56-year-old Chinese Han proband who presented with prominent progressive amnesia, aphasia, executive function impairment, and depression 5 years ago. The 3-year follow-up showed that the patient experienced progressive brain atrophy displayed on magnetic resonance imaging (MRI) and dramatic cognitive decline assessed by neuropsychological evaluation. This patient was clinically diagnosed as EOAD based on established criteria. A heterozygous variant (NM 000447.2: c.1106T>C) of PSEN2 was identified for the first time in this patient and her

Chemotherapy drugs can induce mutations that lead to relapse in pediatric ALL patients

Chemotherapy drugs can induce mutations that lead to relapse in pediatric ALL patients Chemotherapy has helped make acute lymphoblastic leukemia (ALL) one of the most survivable childhood cancers. Now, researchers working in the U.S., Germany and China have shown how chemotherapy drugs called thiopurines can lead to mutations that set patients up for relapse. The work appears today in the journal Nature Cancer. The research provides the first direct genomic and experimental evidence in pediatric cancer that drug-resistant mutations can be induced by chemotherapy and are not always present at diagnosis. The findings offer a paradigm shift in understanding how drug resistance develops. The results also suggest possible treatment strategies for ALL patients who relapse, including screening to identify those who should avoid additional thiopurine treatment.

Chemical Science Symposium 2021: Biohybrid Approaches to Sustainable Energy Conversion

Chemical Science Symposium 2021: Biohybrid Approaches to Sustainable Energy Conversion
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