TY - JOUR
T1 - Identification of clinical factors related to antibody-mediated immune response to the subfornical organ
AU - Nakamura-Utsunomiya, Akari
AU - Goda, Satoshi
AU - Hayakawa, Seiichi
AU - Sonoko, Sakata
AU - Hoorn, Ewout J.
AU - Blanchard, Anne
AU - Saito-Hakoda, Akiko
AU - Kakimoto, Haruna
AU - Hachiya, Rumi
AU - Kamimura, Miki
AU - Kawakita, Rie
AU - Higuchi, Shinji
AU - Fujimaru, Rika
AU - Shirai, Yoko
AU - Miyaoka, Daichi
AU - Nagata, Yuki
AU - Kishi, Yutaro
AU - Wada, Aya
AU - Mitsuboshi, Akari
AU - Ozaki, Kayo
AU - Komatsu, Nagisa
AU - Niizuma, Hidetaka
AU - Kanno, Junko
AU - Fujiwara, Ikuma
AU - Hasegawa, Yukihiro
AU - Yorifuji, Tohru
AU - Brickman, Wendy
AU - Vantyghem, Marie Christine
AU - Yamaguchi, Kei
AU - Goshima, Naoki
AU - Hiyama, Takeshi Y.
N1 - Funding information
MEXT/JSPS KAKENHI, Grant/Award Number: 21K15894; Forum on Growth Hormone
research grant; Novo Nordisk Pharm Ltd. Future Development Grant in the Japanese
Society for Pediatric Endocrinology, the Japanese Society for Pediatric Endocrinology,
Grant/Award Number: the Japanese Society for Pediatric Endocrinology
Publisher Copyright: © 2022 John Wiley & Sons Ltd.
PY - 2022/7
Y1 - 2022/7
N2 - Objective: We recently reported cases of adipsic hypernatremia caused by autoantibodies against the subfornical organ in patients with hypothalamic-pituitary lesions. This study aimed to clarify the clinical features of newly identified patients with adipsic hypernatremia whose sera displayed immunoreactivity to the mouse subfornical organ. Design: Observational cohort study of patients diagnosed with adipsic hypernatremia in Japan, United States, and Europe. Methods: The study included 22 patients with adipsic hypernatremia but without overt structural changes in the hypothalamic-pituitary region and congenital disease. Antibody response to the mouse subfornical organ was determined using immunohistochemistry. The clinical characteristics were compared between the patients with positive and negative antibody responses. Results: Antibody response to the mouse subfornical organ was detected in the sera of 16 patients (72.7%, female/male ratio, 1:1, 12 pediatric and 4 adult patients). The prolactin levels at the time of diagnosis were significantly higher in patients with positive subfornical organ (SFO) immunoreactivity than in those with negative SFO immunoreactivity (58.9 ± 33.5 vs. 22.9 ± 13.9 ng/ml, p <.05). Hypothalamic disorders were found in 37.5% of the patients with positive SFO immunoreactivity. Moreover, six patients were diagnosed with rapid-onset obesity with hypothalamic dysfunction, hypoventilation, and autonomic dysregulation/neural tumor syndrome after the diagnosis of adipsic hypernatremia. Plasma renin activity levels were significantly higher in patients with serum immunoreactivity to the Nax channel. Conclusions: The patients with serum immunoreactivity to the SFO had higher prolactin levels and hypothalamic disorders compared to those without the immunoreactivity. The clinical characteristics of patients with serum immunoreactivity to the subfornical organ included higher prolactin levels and hypothalamic disorders, which were frequently associated with central hypothyroidism and the presence of retroperitoneal tumors.
AB - Objective: We recently reported cases of adipsic hypernatremia caused by autoantibodies against the subfornical organ in patients with hypothalamic-pituitary lesions. This study aimed to clarify the clinical features of newly identified patients with adipsic hypernatremia whose sera displayed immunoreactivity to the mouse subfornical organ. Design: Observational cohort study of patients diagnosed with adipsic hypernatremia in Japan, United States, and Europe. Methods: The study included 22 patients with adipsic hypernatremia but without overt structural changes in the hypothalamic-pituitary region and congenital disease. Antibody response to the mouse subfornical organ was determined using immunohistochemistry. The clinical characteristics were compared between the patients with positive and negative antibody responses. Results: Antibody response to the mouse subfornical organ was detected in the sera of 16 patients (72.7%, female/male ratio, 1:1, 12 pediatric and 4 adult patients). The prolactin levels at the time of diagnosis were significantly higher in patients with positive subfornical organ (SFO) immunoreactivity than in those with negative SFO immunoreactivity (58.9 ± 33.5 vs. 22.9 ± 13.9 ng/ml, p <.05). Hypothalamic disorders were found in 37.5% of the patients with positive SFO immunoreactivity. Moreover, six patients were diagnosed with rapid-onset obesity with hypothalamic dysfunction, hypoventilation, and autonomic dysregulation/neural tumor syndrome after the diagnosis of adipsic hypernatremia. Plasma renin activity levels were significantly higher in patients with serum immunoreactivity to the Nax channel. Conclusions: The patients with serum immunoreactivity to the SFO had higher prolactin levels and hypothalamic disorders compared to those without the immunoreactivity. The clinical characteristics of patients with serum immunoreactivity to the subfornical organ included higher prolactin levels and hypothalamic disorders, which were frequently associated with central hypothyroidism and the presence of retroperitoneal tumors.
UR - http://www.scopus.com/inward/record.url?scp=85128996561&partnerID=8YFLogxK
U2 - 10.1111/cen.14737
DO - 10.1111/cen.14737
M3 - Article
C2 - 35419873
AN - SCOPUS:85128996561
SN - 0300-0664
VL - 97
SP - 72
EP - 80
JO - Clinical Endocrinology
JF - Clinical Endocrinology
IS - 1
ER -
