“…likely to exhibit HHcy (Permoda-Osip, Dorszewska, Skibinska, Chlopocka-Wozniak, & Rybakowski, 2013;Permoda-Osip, Kisielewski, Dorszewska, & Rybakowski, 2014) or have higher levels of Hcy (Dias, Brissos, Cardoso, Andreazza, & Kapczinski, 2009;Sanchez-Autet et al, 2018) than female patients during bipolar depressive episodes, suggesting that sex-associated differences in HHcy exist in patients with BD. Recently, our groups also found that there were sex differences in the prevalence of HHcy and plasma Hcy levels in BD patients (Zhou et al, 2018). However, the pathophysiological mechanisms underlying these phenomena are still unclear.…”