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• W4200300980 abstract "Polycystic ovary syndrome (PCOS) is a common and complex endocrine disorder that is also an important cause of infertility. Adverse psychological stress can aggravate the occurrence and development of PCOS. Bushen Jieyu Tiaochong Formula (BJTF), a prescription of Traditional Chinese Medicine (TCM), has been used in the treatment of PCOS and shown to be effective in reducing negative emotion. However, the therapeutic mechanism has yet to be clearly elucidated. In the current study, we investigated the potential mechanism of action of BJTF.To investigate the role of PERK-ATF4-CHOP signaling in the molecular mechanisms that mediate the effects of BJTF in a rat model of PCOS, with chronic stress induced by letrozole and a chronic unpredictable mild stress (CUMS) paradigm.In addition to the normal control group, the PCOS combined with CUMS model rats were randomly assigned to a model group, a Diane-35 (ethinylestradiol 35 μg/cyproterone acetate 2 mg)-treated positive control group, or one of three BJTF-treated groups receiving a low, medium, or high dose. Behavioral testing, including the sucrose preference test and open field test, was conducted, and hematoxylin and eosin (H&E) staining was used to observe changes in the pathological morphology of ovarian tissue. Free testosterone (FT), luteinizing hormone (LH), and follicle-stimulating hormone (FSH) levels in serum were quantified by enzyme-linked immunosorbent assays (ELISA). The hippocampal levels of norepinephrine (NE), 5-hydroxytryptamine/serotonin (5-HT), and 5-hydroxyindoleacetic acid (5-HIAA) were measured using high-performance liquid chromatography-electrochemical detection (HPLC-ECD). Apoptotic granulosa cells were detected using terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) staining. Furthermore, quantitative reverse transcription polymerase chain reaction (qRT-PCR) and immunohistochemistry were used to detect the expression of glucose-regulated protein 78 (GRP78) and CHOP in the ovarian tissues. The expression levels of GRP78, CHOP, PERK, and ATF4 in ovarian tissues were also measured by western blotting.Treatment with either BJTF or Diane-35 ameliorated the abnormal cystic dilatation of follicles in the model rats and reduced the serum levels of FT and LH, and the LH/FSH ratio. BJTF treatment also attenuated chronic psychological stress-like behavior and regulated the expression and metabolism of cerebral monoamine neurotransmitters. The efficacy of BJTF was greater than that of Diane-35, with the optimal effects observed at the medium dose. BJTF also lowered the apoptotic index of ovarian granulosa cells and downregulated the expression of GRP78, CHOP, and ATF4. Although the expression level of PERK was not significantly altered by BJTF, the mean PERK expression level was the lowest in the medium-dose BJTF group.Administration of BJTF has the therapeutic potential to promote the homeostasis of the reproductive endocrine environment and to restore follicular development and ovulation, possibly through the inhibition of the PERK-ATF4-CHOP signaling pathway, leading to downregulation of GRP78 expression to further delay ovarian granule cell apoptosis mediated by endoplasmic reticulum stress (ERS). Moreover, BJTF could improve behavioral performance by regulating cerebral monoamine neurotransmitters in this rat model. These findings provide a new perspective for treating PCOS related to psychological stress using TCM." @default.
• W4200300980 created "2021-12-31" @default.
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• W4200300980 date "2022-06-01" @default.
• W4200300980 modified "2023-10-16" @default.
• W4200300980 title "Bushen Jieyu Tiaochong Formula reduces apoptosis of granulosa cells via the PERK-ATF4-CHOP signaling pathway in a rat model of polycystic ovary syndrome with chronic stress" @default.
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• W4200300980 doi "https://doi.org/10.1016/j.jep.2021.114923" @default.
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