Frontiers in endocrinology · 2026
Pathogenic SGMS2 variants are not a common cause of early-onset osteoporosis among Finnish patients.
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Loid Petra, Richardt Sampo, Niinimäki Tuukka, Pekkinen Minna, Mäkitie Outi, Mäkitie Riikka
Аннотация
BACKGROUND: Primary osteoporosis can be caused by pathogenic variants in multiple genes. Recently, rare heterozygous variants in SGMS2, encoding SGMS2, have been identified to cause early-onset osteoporosis or more severe skeletal dysplasia. The incidence of pathogenic SGMS2 variants and their consequent clinical features, however, remain limited.
METHODS: This study aimed to identify the prevalence and nature of SGMS2 variants in Finnish patients with genetically undiagnosed idiopathic early-onset osteoporosis. All eleven exons and exon-intron boundaries of SGMS2 were sequenced.
RESULTS: In a cohort of 44 patients (42 females and two males, median age at the time of recruitment 60 years, range 25-76 years), we identified one rare heterozygous missense variant (c.715T>C, p.Phe239Leu) and three intronic variants with unknown functional consequences; no pathogenic or likely pathogenic variants were found.
CONCLUSION: Our results suggest that pathogenic variants in SGMS2 are not a common cause of early-onset idiopathic osteoporosis in Finnish patients. Further studies in larger cohorts and variable skeletal phenotypes are needed to increase our understanding of the role of SGMS2 in skeletal fragility.
METHODS: This study aimed to identify the prevalence and nature of SGMS2 variants in Finnish patients with genetically undiagnosed idiopathic early-onset osteoporosis. All eleven exons and exon-intron boundaries of SGMS2 were sequenced.
RESULTS: In a cohort of 44 patients (42 females and two males, median age at the time of recruitment 60 years, range 25-76 years), we identified one rare heterozygous missense variant (c.715T>C, p.Phe239Leu) and three intronic variants with unknown functional consequences; no pathogenic or likely pathogenic variants were found.
CONCLUSION: Our results suggest that pathogenic variants in SGMS2 are not a common cause of early-onset idiopathic osteoporosis in Finnish patients. Further studies in larger cohorts and variable skeletal phenotypes are needed to increase our understanding of the role of SGMS2 in skeletal fragility.