Siggervåg Anette, Bekkelund Åse K, Saraste Jaakko, Aksnes Henriette
Department of Biomedicine, University of Bergen, 5020 Bergen, Norway.
Brain. 2025 Sep 3;148(9):3085-3094. doi: 10.1093/brain/awaf175.
Primary familial brain calcification (PFBC) provides valuable insights into the mechanisms underlying brain calcification as it singles out the proteins that potentially are involved in the relevant cellular pathways. To date, seven genes have been linked to PFBC, and studying their encoded proteins marks an exciting new era in understanding the disease mechanisms, which may ultimately lead to therapeutic strategies to prevent brain calcification. With each new gene found to be associated with PFBC due to pathogenic variants, an additional level of understanding is achieved. Here, we highlight the most recently discovered PFBC gene, encoding the Golgi-localized N-terminal acetyltransferase NAA60. We explore the novel perspectives gained from the understanding of this enzyme's molecular, cellular and physiological properties. Interestingly, NAA60 shares a critical role with the most frequent PFBC gene, SLC20A2. Both these proteins seem to be involved in maintaining the structural integrity of the Golgi apparatus, as deficiency in either protein leads to Golgi fragmentation. Altered Golgi morphology is therefore emerging as a new significant topic in PFBC research, and we here discuss this topic in relation to existing knowledge regarding Golgi rearrangements and dysfunction as a factor in neurodegenerative diseases.
原发性家族性脑钙化(PFBC)为探究脑钙化的潜在机制提供了宝贵的见解,因为它明确了可能参与相关细胞通路的蛋白质。迄今为止,已有七个基因与PFBC相关联,对其编码蛋白质的研究标志着在理解疾病机制方面开启了一个令人兴奋的新时代,这最终可能会带来预防脑钙化的治疗策略。随着每一个因致病变异而被发现与PFBC相关的新基因出现,我们对该疾病的理解又深入了一层。在此,我们重点介绍最近发现的PFBC基因,它编码定位于高尔基体的N端乙酰转移酶NAA60。我们探讨了从对这种酶的分子、细胞和生理特性的理解中获得的新观点。有趣的是,NAA60与最常见的PFBC基因SLC20A2有着关键作用。这两种蛋白质似乎都参与维持高尔基体的结构完整性,因为其中任何一种蛋白质的缺乏都会导致高尔基体碎片化。因此,高尔基体形态改变正成为PFBC研究中的一个新的重要课题,我们在此结合有关高尔基体重排和功能障碍作为神经退行性疾病一个因素的现有知识来讨论这个课题。
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