A Decade of Research on C9orf72 in Frontotemporal Dementia (2014-2024): A Bibliometric Analysis of Global Trends and Hotspots.

Introduction: Frontotemporal dementia (FTD) is the third most frequent dementia and the leading dementia subtype in individuals under 65. The discovery of C9orf72 (chromosome 9 open reading frame 72) GGGGCC abnormal expansion is a major genetic cause of both FTD and amyotrophic lateral sclerosis (ALS), linking these diseases along a clinicopathological spectrum. This study aimed to depict the research landscape of C9orf72 in FTD over the past decade, track emerging research hotspots, and provide insights into under-researched areas.

Method: Based on the Web of Science database, a bibliometric analysis was conducted to explore publication trends, key contributors, funding sources, journal categories, co-authorship networks, and keyword co-occurrence, clustering, and bursts.

Results: A total of 1,220 articles were identified, with sustained output of over 100 articles annually. The majority of contributions and funding support came from North America and Europe. Hot research themes included hexanucleotide repeats, nucleocytoplasmic transport, disease mechanisms, and therapeutic targets.

Discussion: North America and Europe were highly productive, supported by higher regional prevalence, genetic burden, and robust funding. Ploy-GR in cerebrospinal fluid has emerged as a diagnostic biomarker. Pathogenic mechanisms remain complex, involving both gain- and loss-of-function effects. Metformin and antisense oligonucleotides were considered as potential therapeutics. Further research is needed in underrepresented populations and on the translational potential of emerging molecular targets.

Conclusion: This study offers a comprehensive overview of current trends and future directions over the past decade in C9orf72-related FTD research, allowing researchers-particularly those new to the area-to quickly understand the current landscape.