• Urogenital Tract Infection
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• v.13 no.3
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• pp.79-83
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• 2018

Purpose: The 5 alpha reductase inhibitor (5ARI) reduces the size of the prostate and alleviates lower urinary tract symptoms. After stopping 5ARI, the prostate quickly recovers to its pre-medication size. The purpose of this study was to investigate the factors affecting the restoration of prostate size after 5ARI discontinuation. Materials and Methods: Between March 2009 and May 2017, patients who visited an outpatient clinic and were diagnosed with benign prostatic hyperplasia were selected and start 5ARI medication. After 6 months of medication, the patients stopped medication for 1 year. Meanwhile, we measured the prostate volumes of patients 3 times (before and after medication, after discontinuation) and divide the patients into 3 groups (maintained, intermediate, and restored) with recovered prostate volume ratio. After classification, we investigated the relationship between the variable factors (age, serum prostate-specific antigen, initial volume, reduced volume after medication) between groups. Results: Among the 147 selected patients, the mean age and plasma PSA level were $61.6{\pm}7.9$ and $0.8{\pm}0.6$, respectively. The mean initial prostate volume was $32.3{\pm}4.2ml$, which reduced to $23.2{\pm}3.2ml$ after medication. After one year of discontinuation, the mean volume was $31.4{\pm}6.4ml$, with restoration to 101.5% of the reduced size. We noticed a tendency that patients with faster prostate volume recovery were generally older than those with slower recovery; however, this was not statistically significant. Other factors showed no relationship with prostate recovery. Conclusions: When using 5ARI in elderly patients, continuous treatment seems better than intermittent treatment. If discontinuation is needed, short term follow-up is recommended.

• Biomolecules & Therapeutics
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• v.20 no.1
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• pp.118-124
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• 2012

This study was conducted to evaluate the effect of Grateloupia elliptica, a seaweed native to Jeju Island, Korea, on the prevention of hair loss. When immortalized rat vibrissa dermal papilla cells were treated with extract of G. elliptica, the proliferation of dermal papilla cells significantly increased. In addition, the G. elliptica extract significantly inhibited the activity of $5{\alpha}$-reductase, which converts testosterone to dihydrotestosterone (DHT), a main cause of androgenetic alopecia. On the other hand, the G. elliptica extract promoted $PGE_2$ production in HaCaT cells in a dose-dependent manner. The G. elliptica extract exhibited particularly high inhibitory effect on LPS-stimulated IL-12, IL-6, and TNF-${\alpha}$ production in lipopolysaccharide (LPS)-stimulated bone marrow-derived dendritic cells. The G. elliptica extract also showed inhibitory activity against Pityrosporum ovale, a main cause of dandruff. These results suggest that G. elliptica extract has the potential to treat alopecia via the proliferation of dermal papilla, $5{\alpha}$-reductase inhibition, increase of $PGE_2$ production, decrease of LPS-stimulated pro-inflammatory cytokines and inhibitory activity against Pityrosporum ovale.

• Proceedings of the PSK Conference
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• 2002.04a
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• pp.140.2-140.2
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• 2002

• Toxicological Research
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• v.12 no.2
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• pp.155-161
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• 1996

The enzymatic properties for NADPH-P450 reductase domain of a fusion protein between human cytochrome P450 1A1 and rat NADPH-P450 reductase expressed in Escherichia coli were investigated. The fusion plasmid pCW/1A1OR-expressed E. coli membrane showed high NADPH-cytochrome c reductase activity ($830.1\pm 85.8 nmol\cdot min^{-1}\cdot mg protein^{-1}$), while pCW control vector and P 450 1A1 expression vector pCW/1A1 showed relatively quite low activity ($4.35\pm 0.49, 3.27\pm 0.50 nmol\cdot min^{-1}\cdot mg protein^{-1}$, respectively). The kinetic curves for NADPH-cytochrome c reductase followed typical Michaelis-Menten kinetics. The $K_{max}$ and $V_{max}$ for NADPH-dependent reductase activity were $8.24\pm 2.61\mu $and $817.9\pm 60.8 nmol\cdot min^{-1}\cdot mg protein^{-1}$, respectively, whereas those for cytochrome c-dependent reductase activity were $19.97\pm 2.86\mu M$ and $1303.5\pm 67.1 nmol\cdot min^{-1}\cdot mg protein^{-1}$. The reductase activities were also compared with those of rat, porcine and human liver microsomes. The activity of pCW/ 1A1OR-expressed E. coli membrane was 15.2-fold higher than that of rat liver microsome. Treatment with benzo(a)pyrene, 7-ethoxyresorufin and $\alpha$-naphthofiavone which are known as specific substrates or inhibitor for human P450 1A1 increased NADPH-cytochrome c reductase activity of fusion protein in E. coli membrane dose-dependently. These results demonstrate that the membrane topology of fused enzyme may be important for activity of its NADPH-P450 reductase domain.

• Journal of Life Science
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• v.28 no.10
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• pp.1147-1155
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• 2018

Agaricus blazei mycelial liquid culture extract (ABMLCE) promoted the production of testosterone (TS) in TM-3 mouse Leydig testis cells. Now, we report that ABMLCE containing eritadenine (EA) as a minor constituent (15.3 mg/100 g) reduced $5{\alpha}-reductase$ 2 ($5{\alpha}-R2$) enzyme activity and dihydrotestosterone (DHT) content which are key constituents for the benign prostatic hyperplasia (BPH) inductions. RWPE-1 prostate cells were grown in a Keratinocyte serum-free medium (K-SFM) containing ABMLCE (0~50 ppm), EA (0~10 ppm,), and finasteride (FS $10{\mu}M$: a positive control) in a 24-well plate for 24 hr. Supernatants collected from cell-cultured media were used for the assay of $5{\alpha}-R2$, superoxide dismutase (SOD), catalase (CAT) and cyclooxygenase-2 (COX-2) enzyme activities, and for TS, DHT, tumor necrosis $factor-{\alpha}$ ($TNF-{\alpha}$) and $interleukin-1{\beta}$ ($IL-1{\beta}$) contents by their assay kits. The $5{\alpha}-R2$ activity and DHT content were proportionally reduced (p<0.05) to concentrations of ABMLCE. The SOD and CAT enzyme activities were significantly (p<0.05) elevated concomitant with ABMLCE concentrations, while COX-2, $TNF-{\alpha}$ and $IL-1{\beta}$ showed reverse results (p<0.05). Similarly, the effects of EA were similar to those of ABMLCE. Efficacies of ABMLCE 50 ppm and EA 10 ppm in $5{\alpha}-R2$ and DHT reduction were similar to those of $10{\mu}M$ FS. These results suggest that ABMLCE and EA reduced $5{\alpha}-R2$ and DHT through their anti-inflammatory and anti-oxidative actions. This implies that ABMLCE containing EA could be a beneficial material in the cure of BPH in humans.

• Journal of the Korean Society of Food Culture
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• v.4 no.2
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• pp.185-189
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• 1989

Effect of perilla oil on the fatty acid composition, ACAT and HMG-CoA reductase in the liver microsomes, or cholesterol and protein in serum of rabbit were examined. 1. The content of total protein in serum was almost same amount of both groups, but ${\alpha_1}-globulin$ and r-globuline were incresed or ${\beta}-globulin$ was decresed compared with control. 2. The content of high density lipoprotein incresed, and the content of low density lipoprotein decresed in lipoprotein. 3. Total cholesterol and triglyceride were decresed, and the content of phospholipid was incresed. 4. Perilla oil did not effect for changing blood glucose and $Na^+,\;K^+$ electrolytes. 5. Perilla oil did not effect for changing serum GOT and GPT in rabbit. 6. The activity of ACAT decresed and the activity of HMG-CoA reductase incresed. The activity of ACAT and HMG-CoA reductase in liver microsomes were reciprocal. 7. There were arachidonic acid 20:4, eicosapentaenoic acid 20:5, and docosahexaenoic acid 22:6 in the liver microsomes of rabbits. These highly polyunsaturated fatty acids were convented from linolenic acid 18:3 n-3.

• Journal of the Korean Society of Food Science and Nutrition
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• v.42 no.1
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• pp.1-7
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• 2013

Samjunghwan (SJH) was fermented using five different probiotic bacterial strains (Lactobacillus plantarum, Enterococcus faecium, Pediococcus pentosaceus, Lactobacillus acidophilus or Bifidobacterium longum) separately. We examined the inhibition of preadipocyte differentiation through Oil Red O staining and analyzed the expression of CCAAT/enhancer-binding protein ${\alpha}$ ($C/EPB{\alpha}$), peroxisome proliferator-activated receptor ${\gamma}$ ($PPAR{\gamma}$), uncoupling protein (UCP)-2, and 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase which are adipogenic transcription factors. Both Lactobacillus plantarum and Enterococcus faecium-fermented SJH reduced Oil Red O dye staining compared with the same dose of non-fermented SJH. Only Lactobacillus plantarum-fermented SJH inhibited all adipogenic transcription factors and showed the best down-regulation of $PPAR{\gamma}$, UCP-2, and HMG-CoA reductase compared with the same dose of non-fermented SJH. The effect of SJH on the inhibition of preadipocyte differentiation was more prominent from the fermented SJH. Lactobacillus plantarum-fermented SJH, in particular, blocks the expression of $PPAR{\gamma}$, UCP-2, HMG-CoA reductase.

• Korean Journal of Pharmacognosy
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• v.48 no.2
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• pp.148-154
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• 2017

Crinum asiaticum var. japonicum and its active component, norgalanthamine have been reported to have hair growth-promoting effect via the proliferation of dermal papilla cells. In this study, we investigated the other mechanisms of C. asiaticum extract var. japonicum and norgalanthamine on the hair growth. The C. asiaticum var. japonicum extract inhibited $5{\alpha}$-reductase activity by 16%, which converts testosterone to dihydrotestosterone (DHT), a main cause of androgenetic alopecia, whereas the C. asiaticum var. japonicum extract didn't function as an opener of the $K_{ATP}$ channel. On the other hand, we examined whether norgalanthamine can inhibit transforming growth factor-${\beta}$ (TGF-${\beta}$) signal pathway, which is essential in the regression induction of hair growth. Norgalanthamine inhibited the phosphorylation of Smad2/3 on TGF-${\beta}1$-induced canonical pathway in human keratinocyte HaCaT cells. These results suggested that the C. asiaticum var. japonicum extract and norgalanthamine had the potential to influence hair growth through the inhibition of $5{\alpha}$-reductase activity and TGF-${\beta}1$-induced canonical pathway.

• Journal of the Korean Society of Food Science and Nutrition
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• v.45 no.11
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• pp.1571-1579
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• 2016

We investigated the effect of peanut sprout extract (PSE) on andropause symptoms. PSE was evaluated for impotency and benign prostatic hyperplasia via phosphodiesterase (PDE) or 5-alpha reductase II inhibition assay. Inhibition of PDE and 5-alpha reductase II activities in PSE was significantly higher than that of the non-treated control. To investigate the effects of testosterone levels by PSE, we performed cell media test using TM3 cells. Production of testosterone in TM3 cells was elevated by PSE. These results indicate that PSE was able to alleviate andropause symptoms.

• Journal of the Korean Applied Science and Technology
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• v.31 no.1
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• pp.101-112
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• 2014

The aim of this study was to evaluate the biological mechanism of orally administered ethanolic extract of fly maggot(EM) on hypocholesterolemic rats fed a high-cholesterol diet. Sprague Dawley male rats were divided into four groups (EM dose control=0, 5.0, 7.0, and 9.0 mg/100 g BW) and were treated for 6 weeks. EM groups revealed a significant reduction in serum triglyceride, total cholesterol, and LDL-C when compared with the control group(p<0.05). HMG-CoA reductase activity in EM groups were lower than those of the control group, but total sterol, neutral sterol, and bile acid excretion were increased in EM groups when compared with the control group(p<0.05). To identify the biological mechanism of EM towards the hypocholesterolemic effect, sterol response element binding proteins (SREBPs) and the peroxisome proliferator-activated receptors ($PPAR{\alpha}$ transcription system were determined in rats fed a high-cholesterol diet. It was discovered that EM suppress the expression of SREBP-$1{\alpha}$ and SREBP-2 mRNA in the liver tissues of high-cholesterol diet fed rats, while simultaneously increasing the expression of $PPAR{\alpha}$ mRNA(p<0.05). This finding indicates that EM may have hypocholesterolemic effects in rats fed a high-cholesterol diet, by regulating cholesterol metabolism-related biochemical parameters and SREBP-$1{\alpha}$ SREPB-2 and $PPAR{\alpha}$gene expression.