• Natural Product Sciences
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• 제18권4호
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• pp.211-214
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• 2012

Since 15-hydroxyprostaglandin dehydrogenase (15-PGDH) is the key metabolic enzyme of prostaglandin $E_2$ ($PGE_2$), inhibition of 15-PGDH is supposed to facilitate various physiological functions by increasing $PGE_2$. Methanol extract of Artemisia argyi (AAME) inhibited 15-PGDH ($IC_{50}$: $13.13{\mu}g/mL$) with relatively low cytotoxicity ($IC_{50}$: $415.00{\mu}g/mL$) and elevated extracellular $PGE_2$ levels in HaCaT cells. Real-time PCR analysis showed that AAME decreased significantly mRNA expression of PG transporter (PGT) in HaCaT cells. These results indicate that AAME could be applicable to functional materials as a 15-PGDH inhibitor and PGT expression inhibitor for the upregulation of extracellular $PGE_2$ level.

• Intestinal research
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• 제15권1호
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• pp.75-82
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• 2017

Background/Aims: Cyclooxygenase-2 (COX-2), 15-hydroxyprostaglandin dehydrogenase (15-PGDH), and microsomal prostaglandin E synthase-1 (mPGEs-1) regulate prostaglandin $E_2$ ($PGE_2$) expression and are involved in colon carcinogenesis. We investigated the expression of $PGE_2$ and its regulating genes in sporadic human colon tumors and matched normal tissues. Methods: Twenty colonic adenomas and 27 colonic adenocarcinomas were evaluated. COX-2 and 15-PGDH expression was quantified by real-time polymerase chain reaction. The expression of $PGE_2$ and mPGEs-1 was measured using enzyme-linked immunosorbent assay and Western blotting, respectively. Results: The expression of COX-2, mPGEs-1, and $PGE_2$ did not differ between the adenomas and matched distant normal tissues. 15-PGDH expression was lower in adenomas than in the matched normal colonic tissues (P<0.001). In adenocarcinomas, mPGEs-1 and $PGE_2$ expression was significantly higher (P<0.001 and P=0.020, respectively), and COX-2 expression did not differ from that in normal tissues (P=0.207). 15-PGDH expression was significantly lower in the normal colonic mucosa from adenocarcinoma patients than in the normal mucosa from adenoma patients (P=0.018). Conclusions: Early inactivation of 15-PGDH, followed by activation of COX-2 and mPGEs-1, contributes to $PGE_2$ production, leading to colon carcinogenesis. 15-PGDH might be a novel candidate marker for early detection of field defects in colon carcinogenesis.

• Bulletin of the Korean Chemical Society
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• 제31권2호
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• pp.384-388
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• 2010

Human microsomal prostaglandin E synthase-1 (mPGES-1) catalyzes the conversion of prostaglandin $H_2$ ($PGH_2$) into prostaglandin $E_2$ ($PGE_2$). To establish a stable and efficient method to assess the activity of mPGES-1, a coupled enzyme assay system using mPGES-1, 15-hydroxyprostaglandin dehydrogenase (15-PGDH) and phosphomolybdic acid (PMA) was developed. In this assay system, $PGH_2$ was converted to $PGE_2$ by mPGES-1, and then $PGE_2$ was further transformed to the 15-keto-$PGE_2$ by 15-PGDH accompanying the production of NADH, which was easily detected by fluorescence spectrometry in a multi-well plate format. During the reaction, spontaneous oxidation of $PGH_2$ was prevented by PMA. Using this novel assay, the $K_m$ value of mPGES-1 for $PGH_2$ and the $IC_{50}$ value of the previously characterized inhibitor, MK-886, were determined to be 0.150 mM and $2.8\;{\mu}M$, respectively, which were consistent with the previously reported values. In addition, low backgrounds were observed in the multi-wall plate screening of chemical compounds.

• 한국잠사학회:학술대회논문집
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• 한국잠사학회 2003년도 제46회 춘계 학술연구 발표회
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• pp.67-67
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• 2003

The NAD$^{+}$-dependent 15-hydroxyprostagladin dehydrogenase (15-PGDH) is a key catabolic enzyme responsible for the control of the biological activities of prostagladins. So far the gene has been found in a diverse organism including three insect dipteran species and one lepidopteran species. In this study, a cDNA encoding the 15-PGDH gene homologue was isolated from the cDNA library of the mole cricket, Gryllotalpa orientalis. (omitted)d)

• Journal of Digestive Cancer Research
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• 제3권1호
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• pp.5-10
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• 2015

With advances in the understanding of the biology and genetics of colorectal cancer (CRC), diagnostic biomarkers that may predict the existence or future presence of cancer or a hereditary condition, and prognostic and treatment biomarkers that may direct the approach to therapy have been developed. Biomarkers can be ascertained and assayed from any tissue that may demonstrate the diagnostic or prognostic value, including from blood cells, epithelial cells via buccal swab, fresh or archival cancer tissue, as well as from cells shed into fecal material. For CRC, current examples of biomarkers for screening and surveillance include germline testing for suspected hereditary CRC syndromes, and stool DNA tests for screening average at-risk patients. Molecular biomarkers for CRC that may alter patient care and treatment include the presence or absence of microsatellite instability, the presence or absence of mutant KRAS, BRAF or PIK3CA, and the level of expression of 15-PGDH in the colorectal mucosa. Molecularly targeted therapies and some general therapeutic approaches rely on biomarker information. Additional novel biomarkers are on the horizon that will undoubtedly further the approach to precision or individualized medicine.

• 한국약용작물학회지
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• 제22권6호
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• pp.457-462
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• 2014

Prostaglandin (PG) $E_2$ is an important mediator of skin wound healing without excessive scarring and gastric ulcer healing. However, $PGE_2$ has a short lifetime in vivo because it is metabolized rapidly by 15-hydroxyprostaglandin dehydrogenase (15-PGDH). Ethanol extract of Eriobotryae folium (EFEE) elevated intracellular and extracellular $PGE_2$ levels in HaCaT cells and inhibited 15-PGDH ($ED_{50}$ : $168.4{\mu}g/mL$) with relatively low cytotoxicity ($IC_{50}$ : $250.0{\mu}g/mL$). Real-time PCR analysis showed that mRNA expression of cyclooxygenase (COX)-1 and COX-2 enzymes were increased and prostaglandin transporter (PGT) was decreased in HaCaT cells by EFEE. Moreover, wound healing effect of EFEE ($168.4{\mu}g/mL$) was comparable to that of TGF-${\beta}1$ (300 pg/mL) as a positive control. These results demonstrate that EFEE may be valuable therapeutic materials for the treatment of $PGE_2$ level dependent diseases.

• 한국패류학회지
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• 제15권1호
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• pp.13-20
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• 1999

A horizontal starch gel electrophoresis for enzyme proteins extracted from three Korean species and one Chinese species of Semisulcospira was carried out in order to elucidate their genetic relationships. A total of 10 enzymes were employed in three different of buffer systems. Two loci from each enzyme of GAPDH, GOT, ICDH, IDH and PEP(VL); three loci from each of three enzymes, EST, PEP(LGG) and PGDH; and five loci from GPI were observed. Most of the loci in three pleurocerid species employed showed homozygous monomorphic banding patterns and some of them were specific as genetic markers between two different species. However, EST-2, PEP(LGG-3) and PGDH-1 loci in Korean S. libertina and PEP(LGG-3), PGM-1 and PGM-2 loci in Chinese S. libertina showed polymorphic banding patterns. Three Korean Semisulcospira species including S. libertina were more closely clustered in a dendrogram within the range of genetic identity values of 0.818-0.936, and these clusters were lineated with Chinese S. libertina at the value of 0.621.

• 한국식품영양과학회지
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• 제36권8호
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• pp.965-974
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• 2007

본 연구는 새싹채소 혼합분말(배추, 유채, 브로콜리, 적무, 갓, 알팔파, 메밀 및 보리)이 혈액 및 지방조직의 지질대사 개선효과를 살펴보기 위하여 고지방식이를 섭취한 흰쥐에게 새싹채소 혼합분말을 식이의 5%와 10%로 4주간 급여한 후, 체내 지방조직의 지방 함량, 지방세포의 크기, 지방합성 관련 효소인 ME, 6PGDH, G6PDH, LPL 활성, 혈청 지질성상, 인슐린 및 렙틴 농도를 측정하였다. 체중증가량은 고지방식이만을 급여한 HF-N군이 유의하게 증가하였으며, 고지방식이와 새싹채소 혼합분말을 동시에 급여한 HF-CSL군과 HF-CSH군은 정상지방섭취군인 NF-C군과 유사하였다. 고지방식이만을 급여한 HF-N군은 지방조직의 무게와 지방 함량이 유의하게 높았으며, HF-CSL군과 HF-CSH군은 NF-C군보다도 낮은 경향이었다. 혈청 중 중성지방, 총콜레스테롤 및 LDL-콜레스테롤 함량은 고농도의 새싹채소 혼합분말을 급여한 HF-CSH군이 정상지방섭취군인 NF-C군보다도 낮았으며, HDL-콜레스테롤 함량은 NF-C군보다 높았다. 혈청 인슐린과 렙틴 농도는 HF-N군이 다른 군들에 비하여 가장 높게 나타났으며, 새싹채소 혼합분말의 효과는 새싹채소 혼합분말의 섭취량이 증가함에 따라 감소하였다. 지방세포의 크기도 HF-N군이 다른 군들에 비하여 유의하게 컸다. 새싹채소 혼합분말의 섭취량이 증가함에 따라 지방세포 크기가 작아지는 경향이었다. 지방조직의 지방합성관련 효소인 ME, 6PGDH 및 G6PDH 활성은 지방조직 모두 HF-N군에서 가장 높았다. 새싹채소 혼합분말을 고농도 첨가한 HF-CSH군은 ME와 G6PDH 활성이 가장 낮았으며, NF-C군과는 유사한 활성을 나타내었다. 새싹채소 혼합분말의 섭취량이 증가함에 따라 지방조직의 ME, 6PGDH 및 G6PDH 활성은 저하되었다. 지방조직의 HR-LPL과 TE-LPL 활성은 HF-N군이 다른 군들에 비하여 증가하였으며, 새싹채소 혼합분말의 첨가량이 증가할수록 HR-LPL과 TE-LPL 활성 모두 유의하게 저하되었다. 고농도의 새싹채소 혼합분말을 첨가한 HF-CSH군은 NF-C군가 비슷한 LPL 활성을 나타내었다. 이상의 결과 흰쥐의 경우 식이섬유소를 첨가하지 않고 고지방식이만을 급여 시 체중 및 체지방 함량 증가, 혈청 중 총콜레스테롤 및 중성지방 함량 증가, 지방합성관련 효소 활성 증가를 유도하며, 식이 지방의 섭취 수준이 심혈관계질환에 미치는 영향이 큰 것으로 나타났다. 고지방식이로 인하여 증가된 이러한 결과는 새싹채소 혼합분말 섭취로 혈청 및 지방조직의 지질대사 개선에 영향을 미치는 것으로 나타났다. 이러한 효과는 새싹채소 혼합분말이 혈청 중 총콜레스테롤, 중성지질, 인슐린, 렙틴 농도의 변화와 지방조직의 지방합성관련 효소의 활성 변화로 유도된 것으로 사료된다.