Objective: Lipoprotein (a) (Lp[a]), which is a highly heritable trait, is associated with coronary artery disease (CAD). However, the insight into whether the association between Lp(a) and CAD differs according to the family history of CAD remains unclear. Methods: We investigated clinical data of 4,512 participants who underwent serum Lp(a) level measurement at Kanazawa University Hospital between 2008 and 2016. The association between Lp(a) and CAD according to CAD family history was investigated through logistic regression analyses. Results: CAD family history and Lp(a) levels were significantly associated with CAD development (odds ratio [OR], 1.32; 95% confidence interval [CI], 1.12–1.52; p<0.001 and OR, 1.13; 95% CI, 1.03–1.23; p<0.001 per 10 mg/dL, respectively). In patients without CAD family history, those with Lp(a) levels ≥30 mg/dL had higher CAD risk than those with Lp(a) levels <30 mg/dL (reference) (OR, 1.33; 95% CI, 1.05–1.61; p<0.001). In patients with CAD family history, those who had Lp(a) levels <30 and ≥30 mg/dL were both highly at risk for CAD (OR, 1.24; 95% CI, 1.04–1.44; p<0.001 and OR, 1.68; 95% CI, 1.34–2.02; p<0.001, respectively). Adding CAD family history and Lp(a) information to other conventional risk factors enhanced CAD risk discrimination (C-statistics: 0.744 [0.704–0.784] to 0.768 [0.730–0.806], and 0.791 [0.751–0.831], respectively; p<0.05 for both). Conclusion Lp(a) level was associated with CAD development regardless of CAD family history status.

Objective: Lipoprotein (a) (Lp[a]), which is a highly heritable trait, is associated with coronary artery disease (CAD). However, the insight into whether the association between Lp(a) and CAD differs according to the family history of CAD remains unclear. Methods: We investigated clinical data of 4,512 participants who underwent serum Lp(a) level measurement at Kanazawa University Hospital between 2008 and 2016. The association between Lp(a) and CAD according to CAD family history was investigated through logistic regression analyses. Results: CAD family history and Lp(a) levels were significantly associated with CAD development (odds ratio [OR], 1.32; 95% confidence interval [CI], 1.12–1.52; p<0.001 and OR, 1.13; 95% CI, 1.03–1.23; p<0.001 per 10 mg/dL, respectively). In patients without CAD family history, those with Lp(a) levels ≥30 mg/dL had higher CAD risk than those with Lp(a) levels <30 mg/dL (reference) (OR, 1.33; 95% CI, 1.05–1.61; p<0.001). In patients with CAD family history, those who had Lp(a) levels <30 and ≥30 mg/dL were both highly at risk for CAD (OR, 1.24; 95% CI, 1.04–1.44; p<0.001 and OR, 1.68; 95% CI, 1.34–2.02; p<0.001, respectively). Adding CAD family history and Lp(a) information to other conventional risk factors enhanced CAD risk discrimination (C-statistics: 0.744 [0.704–0.784] to 0.768 [0.730–0.806], and 0.791 [0.751–0.831], respectively; p<0.05 for both). Conclusion Lp(a) level was associated with CAD development regardless of CAD family history status.

Objective: Lipoprotein (a) (Lp[a]), which is a highly heritable trait, is associated with coronary artery disease (CAD). However, the insight into whether the association between Lp(a) and CAD differs according to the family history of CAD remains unclear. Methods: We investigated clinical data of 4,512 participants who underwent serum Lp(a) level measurement at Kanazawa University Hospital between 2008 and 2016. The association between Lp(a) and CAD according to CAD family history was investigated through logistic regression analyses. Results: CAD family history and Lp(a) levels were significantly associated with CAD development (odds ratio [OR], 1.32; 95% confidence interval [CI], 1.12–1.52; p<0.001 and OR, 1.13; 95% CI, 1.03–1.23; p<0.001 per 10 mg/dL, respectively). In patients without CAD family history, those with Lp(a) levels ≥30 mg/dL had higher CAD risk than those with Lp(a) levels <30 mg/dL (reference) (OR, 1.33; 95% CI, 1.05–1.61; p<0.001). In patients with CAD family history, those who had Lp(a) levels <30 and ≥30 mg/dL were both highly at risk for CAD (OR, 1.24; 95% CI, 1.04–1.44; p<0.001 and OR, 1.68; 95% CI, 1.34–2.02; p<0.001, respectively). Adding CAD family history and Lp(a) information to other conventional risk factors enhanced CAD risk discrimination (C-statistics: 0.744 [0.704–0.784] to 0.768 [0.730–0.806], and 0.791 [0.751–0.831], respectively; p<0.05 for both). Conclusion Lp(a) level was associated with CAD development regardless of CAD family history status.

Objective: Lipoprotein (a) (Lp[a]), which is a highly heritable trait, is associated with coronary artery disease (CAD). However, the insight into whether the association between Lp(a) and CAD differs according to the family history of CAD remains unclear. Methods: We investigated clinical data of 4,512 participants who underwent serum Lp(a) level measurement at Kanazawa University Hospital between 2008 and 2016. The association between Lp(a) and CAD according to CAD family history was investigated through logistic regression analyses. Results: CAD family history and Lp(a) levels were significantly associated with CAD development (odds ratio [OR], 1.32; 95% confidence interval [CI], 1.12–1.52; p<0.001 and OR, 1.13; 95% CI, 1.03–1.23; p<0.001 per 10 mg/dL, respectively). In patients without CAD family history, those with Lp(a) levels ≥30 mg/dL had higher CAD risk than those with Lp(a) levels <30 mg/dL (reference) (OR, 1.33; 95% CI, 1.05–1.61; p<0.001). In patients with CAD family history, those who had Lp(a) levels <30 and ≥30 mg/dL were both highly at risk for CAD (OR, 1.24; 95% CI, 1.04–1.44; p<0.001 and OR, 1.68; 95% CI, 1.34–2.02; p<0.001, respectively). Adding CAD family history and Lp(a) information to other conventional risk factors enhanced CAD risk discrimination (C-statistics: 0.744 [0.704–0.784] to 0.768 [0.730–0.806], and 0.791 [0.751–0.831], respectively; p<0.05 for both). Conclusion Lp(a) level was associated with CAD development regardless of CAD family history status.

Objective: Sitosterolemia is a rare autosomal recessive disease caused by the deleterious variants of adenosine 5'-triphosphate (ATP)-binding cassette sub-family G member 5 (ABCG5) or ATP-binding cassette sub-family G member 8 (ABCG8). There are only few data on the pathogenicity of ABCG5 and ABCG8. This study aimed to propose a scheme for determining variant pathogenicity and to catalog the putative pathogenic variants in sitosterolemia. Methods: This study enrolled 377 consecutive Japanese patients with hyper-low-density lipoprotein cholesterolemia (mean age: 46.5±19.8 years, with 192 men) who have targetedsequenced data on ABCG5 or ABCG8 (among 21 Mendelian lipid genes for any dyslipidemias) and serum sitosterol levels at Kanazawa University Hospital from 2016 to 2021. Serum sitosterol levels were divided by 0.79 in patients treated with ezetimibe, accounting for the average reduction with this drug. ABCG5 or ABCG8 variants were defined as putative pathogenic if associated with serum sitosterol levels ≥5 µg/mL or homozygous if associated with serum sitosterol levels ≥10 µg/mL. Results: Twenty-three ABCG5 or ABCG8 variants (16 missense, 2 nonsense, 2 frameshift, 2 deletion, and 1 splice mutation) were identified. Based on our definition, 11 putative pathogenic variants (median sitosterol level: 10.1 [6.5–17.1] µg/mL) were found in 36 individuals and 12 benign variants (median sitosterol: 3.5 [2.5–4.1] µg/mL) in 14 individuals. Conclusion The scheme proposed for assessing the pathogenicity of genetic variations (ABCG5 and ABCG8) is useful. Using this scheme, 11 putative pathogenic, and 12 benign variants in ABCG5 or ABCG were classified.