European journal of endocrinology · 2012
Nonalcoholic fatty liver disease in adult hypopituitary patients with GH deficiency and the impact of GH replacement therapy.
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Nishizawa Hitoshi, Iguchi Genzo, Murawaki Ayumi, Fukuoka Hidenori, Hayashi Yoshitake, Kaji Hidesuke, Yamamoto Masaaki, Suda Kentaro, Takahashi Michiko, Seo Yasushi, Yano Yoshihiko, Kitazawa Riko, Kitazawa Sohei, Koga Masafumi, Okimura Yasuhiko, Chihara Kazuo, Takahashi Yutaka
Аннотация
BACKGROUND: Liver dysfunction in adult hypopituitary patients with GH deficiency (GHD) has been reported and an increased prevalence of nonalcoholic fatty liver disease (NAFLD) has been suggested.
OBJECTIVE: The objective of the present study was to elucidate the pathophysiology of the liver in adult hypopituitary patients with GHD.
PATIENTS AND METHODS: We recruited 69 consecutive Japanese adult hypopituitary patients with GHD and examined the prevalence of NAFLD by ultrasonography and nonalcoholic steatohepatitis (NASH) by liver biopsy. Patients had been given routine replacement therapy except for GH. We compared these patients with healthy age-, gender-, and BMI-matched controls. We further analyzed the effect of GH replacement therapy on liver function, inflammation and fibrotic markers, and histological changes.
RESULTS: The prevalence of NAFLD in hypopituitary patients with GHD was significantly higher than in controls (77 vs 12%, P<0.001). Of 16 patients assessed by liver biopsy, 14 (21%) patients were diagnosed with NASH. GH replacement therapy significantly reduced serum liver enzyme concentrations in the patients and improved the histological changes in the liver concomitant with reduction in fibrotic marker concentrations in patients with NASH.
CONCLUSIONS: Adult hypopituitary patients with GHD demonstrated a high NAFLD prevalence. The effect of GH replacement therapy suggests that the NAFLD is predominantly attributable to GHD.
OBJECTIVE: The objective of the present study was to elucidate the pathophysiology of the liver in adult hypopituitary patients with GHD.
PATIENTS AND METHODS: We recruited 69 consecutive Japanese adult hypopituitary patients with GHD and examined the prevalence of NAFLD by ultrasonography and nonalcoholic steatohepatitis (NASH) by liver biopsy. Patients had been given routine replacement therapy except for GH. We compared these patients with healthy age-, gender-, and BMI-matched controls. We further analyzed the effect of GH replacement therapy on liver function, inflammation and fibrotic markers, and histological changes.
RESULTS: The prevalence of NAFLD in hypopituitary patients with GHD was significantly higher than in controls (77 vs 12%, P<0.001). Of 16 patients assessed by liver biopsy, 14 (21%) patients were diagnosed with NASH. GH replacement therapy significantly reduced serum liver enzyme concentrations in the patients and improved the histological changes in the liver concomitant with reduction in fibrotic marker concentrations in patients with NASH.
CONCLUSIONS: Adult hypopituitary patients with GHD demonstrated a high NAFLD prevalence. The effect of GH replacement therapy suggests that the NAFLD is predominantly attributable to GHD.