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Yaqi Wu,Chaojie Chong,Zhewen Dong,Zixian Wang,Haokun Chen,Shumei Zhong,Qi Qi Pang,Jia-Le Song,Yanyuan Zhou 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
To explore the ameliorative effect of Phellinus linteus polysaccharide(PLP) on letrozole-induced PCOS rats. A total of 32 female SD rats were randomly divided into normal group, PCOS group, metformin group and PLP group, and weighed every three days. The estrous cycle of rats was observed by vaginal smear ten days before sacrifice. The estrous cycle of PCOS rats was disordered, the ovaries showed polycystic changes and the body weight and the relative weight of the ovaries increased (P<0.05). The estrous cycle, polycystic ovary, body weight and relative weight of the ovaries in PLP group and Metformin group recovered significantly (P<0.05). The serum levels of TC, TG, LDL-C, HDL-C, FINS, T, LH, E2 and FSH were detected by ELISA kits. After treatment, the serum levels of TC, TG, LDL-C, FINS, T, LH and LH/FSH in the PLP group and Metformin group were lower than PCOS group (P<0.05). In addition, the serum levels of E2, FSH and HDL-C were increased (P<0.05) in the PLP group and Metformin group. The results showed that Phellinus linteus polysaccharides can ameliorate glucose and lipid metabolism, polycystic ovary and regulate the levels of sex hormones in PCOS rats.
Zixian Wang,Wanying Li,Zhewen Dong,Chaojie Chong,Yaqi Wu,Shumei Zhong,Haokun Chen,Qi Qi Pang,Jia-Le Song 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
To observe the effect of cyanidin-3,5-O-diglucoside(C3G) on intestinal fibrosis in a model of dextran sulphate sodium (DSS)-induced mice with colitis. Colitis was induced in C57BL/6 mice by addition of DSS to drinking water. Clinical (body weight, colon length and colon weight) and histologic changes were evaluated. In addition, colon levels of interleukin-1β, IL-6, IL-18, IL-17A, tumor necrosis factor(TNF)-α were detected by enzyme-linked immunosorbent assay. Relative to the DSS group, the mice in the C3G treatment group increased in body weight, colon length, and the ratio of colon weight to length was significantly lower (P<0.05). The DAI index of mice in the intervention group was lower than that in the colitis model group (P<0.05). Histological observation also found that the intervention of C3G is able to reduce the infiltration of inflammatory cells in colon tissue induced by DSS. The results of Masson staining suggest that the intervention of C3G also reduces the occurrence of intestinal fibrosis in mice with colitis. Our results suggested that C3G is an activity to improve inflammation and intestinal fibrosis in DSS colitis mice.
Microcystic Stromal Tumor of Testicle: First Case Report and Literature Review
Pengcheng Zhu,Yaqi Duan,Qilin Ao,Guoping Wang 대한암학회 2018 Cancer Research and Treatment Vol.50 No.4
Microcystic stromal tumor (MCST) is a rare subtype of sex cord-stromal neoplasm. Tumors from all 31 previously reported cases were located in the ovary. Herein, we present a unique case of a right-side testicular tumor in a 33-year-old Chinese male. The tumor is composed of predominantly lobulated cellular nodules separated by hyalinized fibrous stroma and they expressed CD10, -catenin (nuclear), and cyclin D1. Molecular analysis identified a point mutation (c.110C>G) in exon 3 of CTNNB1. The histopathological features, immunohistochemistry profiles, and molecular analysis of this tumor were consistent with MCST of the ovary. Therefore, a diagnosis of MCST of the right testicle was determined. To the best of our knowledge, this is the first case of MCST occurring in the testicles. The study may provide new insights to the tumor biology of MCST and a better understanding of this rare entity.
Initiation Mechanisms of Styrene with Methyl Ethyl Ketone Peroxide- Cobalt System
Ruiwei Guo,Yaqi Wang,Yongtao Qi,Auke G Talma,Jianhua Zhang 한국고분자학회 2018 Macromolecular Research Vol.26 No.8
Unsaturated polyester resins (UPR) cured with styrene has been widely used in the various industrial fields. Methyl ethyl ketone peroxides (MEKP)-cobalt(II) system is the most common initiator for the curing of UPR. However, its initiation mechanisms currently remain elusive. In this study, the monomeric MEKP (MEKP-1) was firstly separated out from the commercial MEKP products, and then the radical initiation mechanisms of MEKP-1 catalyzed by cobalt isooctoate in the presence and absence of styrene were comparatively investigated by a combination of nitroxide radical trapping technique and HPLC-ESI/MS (high performance liquid chromatography- electrospray ionization/mass spectrometry). The amount of trapped products originated from methyl radical, ethyl radical and hydroxyl radical was significantly larger than that of trapped products from other radicals. These results indicated that methyl, ethyl and hydroxyl radicals were the dominant intermediate radicals formed in the initiation process of MEKP-cobalt(II) system, which would serve as the primary source to initiate styrene polymerization.
Yang Chen,Yaqi Sun,Mofan Tian,Laili Wang,Haoyuan Jin 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
Dielectric elastomer (DE) is a kind of capacitive material that widely used in soft robots’ applications as actuators. To obtain notable deformation, the drive voltage is typically up to several thousand volts and the charging charges must be removed to make it recover. In this paper, a high step-up capacitive load bi-directional flyback converter with active clamp technique is proposed. For the charging process, the effects of increasing high output voltage and parasitic elements in the circuit on the operation of the active clamp circuit are discussed in detail. Wide bandgap devices are used at the secondary side to reduce the parasitic capacitance. The proposed lossless active clamp circuit can absorb the energy in leakage inductance of transformer and achieve zero-voltage-switching (ZVS) over most of the charging process. Besides, the EMI problem caused by leakage inductance of conventional flyback converter is also solved. A prototype with 12V input and 1000V output has been fabricated and compared with a quasi-resonance flyback (QR flyback) at the same working condition. The tested results verify the good performance of the proposed ACF converter.
Chaojie Chong,Yaqi Wu,Zhewen Dong,Zixian Wang,Shumei Zhong,Haokun Chen,Qi Qi Pang,Jia-Le Song,Yanyuan Zhou 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
This study was to investigate the ameliorative effect of GFPS on clinical symptoms in letrozole(1 mg/kg)-induced PCOS rats. The female SD rats were classified into 4 groups as follows: the normal group (gavaged with saline), the PCOS group(ingested letrozole daily for 21 days). Normal group and metformin group gavaged with letrozole followed by metformin (265 mg/kg) and GFPS(600 mg/kg), respectively. All rats were weighed every 3 days until the end of the experiment. The ovaries, perirenal, abdomen and periuterine fat were removed and the relative weights (g/bw×100) were calculated. Serum levels of FSH, LH, E2, T, TG, TC, LDL-C were measured by ELISA and calculated the LH/FSH ratio. GFPS reduced follicle number and increases granulosa cell layer thickness and luteal number. GFPS also reduced the increase of body weight, ovarian and visceral fat weight in PCOS rats (P<0.01). In addition, GFPS reduced the serum levels of T, LH/FSH, TC, TG, LDL-C and LH, and elevated the serum levels of E2 and FSH in PCOS rats. In conclusion, GFPS can improve follicular development and restore body weight, ovarian weight, serum hormone levels and lipid profile in PCOS rats.
Junyang Liu,Zixian Wang,Wanying Li,Zhewen Dong,Chaojie Chong,Yaqi Wu,Shumei Zhong,Haokun Chen,Zhiqiang Liu,Qi Qi Pang,Jia-Le Song 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
To explore the effect of C3G on intestinal mucosal injury in 5-FU induced BALB/c mice. Mice were randomly divided into normal, model and C3G groups. After the last administration, mice were anesthetized, and calculated the thymus and spleen indexes. The ileum was used to stain with H&E observation. Serum levels of IL-1β, IL-6, IL-10 and TNF-α were determined by ELISA kits. Compared with the normal group, the model group had diarrhea, body weight and thymus and spleen index decreased significantly, intestinal villus epithelial cells fell off, crypt structure was destroyed, and inflammatory cell infiltration was observed. The body weight, thymus and spleen indexes of the treatment group and the prevention group decreased less, and the levels of TNF-α, IL-1β and IL-6 were significantly decreased, and the level of IL-10 was significantly increased relative to the model group. The intestinal villi structure was relatively complete, and a small amount of crypt structure was destroyed, with a small amount of inflammatory cell infiltration, which reduced the mucosal damage. The administration of C3G could protect intestinal mucosa from 5-FU-induced injury.
Huan Lan,Zhewen Dong,Yaqi Wu,Chaojie Chong,Zhiqiang Liu,Wanying Li,Zixian Wang,Junyang Liu,Qi Qi Pang,Jia-Le Song,Yanyuan Zhou 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
This study investigated the antifibrotic effects of SA on ovarian fibrosis in letrozole-induced PCOS in rats. SA treatment restored letrozole-induced alterations in the body weight (BW), relative weights of the ovaries, and visceral adipose tissues. Histological observation showed that SA reduced the number of atretic follicles, cystic follicles, and fibrosis of the ovaries in PCOS rats. SA treatment also modulated the serum levels of sex hormones, which decreased the luteinizing hormone (LH), and testosterone (T) and increased the follicle-stimulating hormone (FSH) in PCOS rats. Administration of SA reduced letrozole-induced metabolic dysfunction by decreasing the serum levels of triglyceride (TG) and total cholesterol (TC) and increasing the levels of high-density lipoprotein cholesterol (HDL-C) in PCOS rats. Finally, SA treatment appeared to increase the activity of PPAR-γ, reduce the activation of the TGF-β1/Smad pathway, and reduce the collagen I, α-SMA and CTGF levels in the ovaries of the PCOS rats. Our results demonstrated that SA significantly ameliorated ovarian fibrosis and abolic disturbances in the letrozole-induced PCOS rats.