title: Effects of Huang Bai (Phellodendri Cortex) and Three Other Herbs on GnRH and GH Levels in GT1-7 and GH3 Cells.
abstract: The present study was to evaluate the effects of Huang Bai, Zhi Mu, Mai Ya, and Xia Ku Cao on hormone using the GT1-7 and GH3 cells. The GT1-7 and GH3 cell lines were incubated with DW; DMSO; and 30, 100, or 300 μg/mL of one of the four extract solutions in serum-free media for 24 hours. The MTT assay was performed to determine the cytotoxicity of the four herbs. The GT1-7 and GH3 cells were incubated in DW, estradiol (GT1-7 only), or noncytotoxic herb solutions in serum-free medium for 24 hours. A quantitative RT-PCR and western blot were performed to measure the GnRH expression in GT1-7 cells and GH expression in GH3 cells. Huang Bai, Zhi Mu, Xia Ku Cao, and Mai Ya inhibited the GnRH mRNA expression in GT1-7 cells, whereas Huang Bai enhanced GH mRNA expression in GH3 cells. Additionally, Xia Ku Cao inhibited GnRH protein expression in GT1-7 cells and Huang Bai promoted GH protein expression in GH3 cells. The findings suggest that Huang Bai can delay puberty by inhibiting GnRH synthesis in the hypothalamus while also accelerating growth by promoting GH synthesis and secretion in the pituitary.
authors.affiliation: Department of Clinical Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea; Department of Pediatrics of Korean Medicine, Kyung Hee University Medical Center, Seoul 02447, Republic of Korea.
authors.forename: Sun Haeng
authors.initials: SH
authors.lastname: Lee
authors.affiliation: Korea Institute of Science and Technology for Eastern Medicine (KISTEM), NeuMed Inc., Seoul 02440, Republic of Korea.
authors.forename: Sung Chul
authors.initials: SC
authors.lastname: Kwak
authors.affiliation: Korea Institute of Science and Technology for Eastern Medicine (KISTEM), NeuMed Inc., Seoul 02440, Republic of Korea.
authors.forename: Dong Kwan
authors.initials: DK
authors.lastname: Kim
authors.affiliation: Korea Institute of Science and Technology for Eastern Medicine (KISTEM), NeuMed Inc., Seoul 02440, Republic of Korea.
authors.forename: Sang Woug
authors.initials: SW
authors.lastname: Park
authors.affiliation: Department of Herbal Pharmacology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea.
authors.forename: Hyun Soo
authors.initials: HS
authors.lastname: Kim
authors.affiliation: Department of Herbal Pharmacology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea.
authors.forename: Young-Sik
authors.initials: YS
authors.lastname: Kim
authors.affiliation: Department of Herbal Pharmacology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea.
authors.forename: Donghun
authors.initials: D
authors.lastname: Lee
authors.affiliation: Department of East-West Medical Science, Graduate School of East-West Medical Science, Kyung Hee University, Yongin 17104, Republic of Korea.
authors.forename: Ju Won
authors.initials: JW
authors.lastname: Lee
authors.affiliation: Department of East-West Medical Science, Graduate School of East-West Medical Science, Kyung Hee University, Yongin 17104, Republic of Korea.
authors.forename: Chang Gon
authors.initials: CG
authors.lastname: Lee
authors.affiliation: Department of East-West Medical Science, Graduate School of East-West Medical Science, Kyung Hee University, Yongin 17104, Republic of Korea.
authors.forename: Hae Kyung
authors.initials: HK
authors.lastname: Lee
authors.affiliation: Department of Clinical Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea.
authors.forename: Sung-Min
authors.initials: SM
authors.lastname: Cho
authors.affiliation: Department of Clinical Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea.
authors.forename: Yu Jeong
authors.initials: YJ
authors.lastname: Shin
authors.affiliation: Department of Clinical Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea; Department of Pediatrics of Korean Medicine, Kyung Hee University Medical Center, Seoul 02447, Republic of Korea.
authors.forename: Jin Yong
authors.initials: JY
authors.lastname: Lee
authors.affiliation: Department of Herbal Pharmacology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea.
authors.forename: Hocheol
authors.initials: H
authors.lastname: Kim
authors.affiliation: Department of Clinical Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea; Department of Pediatrics of Korean Medicine, Kyung Hee University Hospital at Gangdong, Seoul 05278, Republic of Korea.
authors.forename: Gyu Tae
authors.initials: GT
authors.lastname: Chang