An antioxidant was purified from human placenta extract (HPE) by using gel filtration, liquid-liquid extraction, silicagel column chromatography, and HPLC. The purified antioxidant was identified to be L-tryptophan (L-Trp). L-Trp showed higher inhibitory activity than mannitol and DMSO on the Fenton reaction-induced degradation of 2-deoxy-D-ribose. L-Trp also had much higher inhibitory activity on the cytochrome P-450-dependent lipid peroxidation than the previously identified antioxidants of HPE, L-phenylalanine, L-tyrosine and uracil. On the other hand, the inhibitory effect of L-Trp on the Fenton reaction-induced protein oxidation was smaller than that of uracil. These results suggest that L-Trp is a main antioxidant of HPE of which the effect is based on the suppression of lipid peroxidation in the oxidative stress status.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.3177/jnsv.48.36 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Distinct TYRO3 and PROS1 expression levels contribute to preeclampsia pathogenesis.
Histochem Cell Biol
January 2025
Departments of Obstetrics and Gynecology, School of Medicine, Akdeniz University, Antalya, Turkey.
Preeclampsia (PE) is a severe placental complication occurring after the 20th week of pregnancy. PE is associated with inflammation and an increased immune reaction against the fetus. TYRO3 and PROS1 suppress inflammation by clearing apoptotic cells.
View Article and Find Full Text PDFAQP3 Influences Unexplained Recurrent Abortion by Regulating Trophoblast Cell Migration and Invasion via the METTL14/IGF2BP1/AQP3/PI3K/AKT Pathway.
J Cell Mol Med
February 2025
Department of Reproductive Health and Infertility, Guangdong Women and Children Hospital, Guangzhou, Guangdong, China.
Reduced trophoblast migration and invasion contribute to unexplained recurrent spontaneous abortion (URSA). Aquaporin 3 (AQP3) plays a crucial role in facilitating trophoblast migration and invasion during early pregnancy through fetal-maternal crosstalk. This study aimed to comprehensively investigate the mechanism involving AQP3 and its modulatory effects on human extravillous trophoblast (HTR-8/SVneo cells) migration and invasion.
View Article and Find Full Text PDFEffects of tributyltin on placental and reproductive abnormalities in offspring.
Arch Endocrinol Metab
January 2025
Universidade Federal do Espírito Santo Departamento de Morfologia VitóriaES Brasil Departamento de Morfologia, Universidade Federal do Espírito Santo, Vitória, ES, Brasil.
Tributyltin (TBT) is an organotin compound and a common persistent environmental pollutant with endocrine-disrupting chemical (EDC) actions. It can accumulate in the environment at various concentrations throughout the food chain in the ecosystem, posing a risk to human health, especially during critical periods such as gestation and fetal and offspring development. In this review, we report the results of studies describing the consequences of TBT exposure on placental and reproductive parameters in offspring of both sexes.
View Article and Find Full Text PDFA study on the production of extracellular vesicles derived from novel immortalized human placental mesenchymal stromal cells.
Sci Rep
January 2025
International Research Center for Biological Sciences, Ministry of Science and Technology, Shanghai Ocean University, No. 999 Hucheng Ring Road, Shanghai, 201306, China.
Extracellular vesicles (EVs) are not only involved in cell-to-cell communications but have other functions as "garbage bags", as bringing nutrients to cells, and as inducing mineral during bone formation and ectopic calcification. These minuscule entities significantly contribute to the regulation of bodily functions. However, the clinical application of EVs faces challenges due to limited production yield and targeting efficiency.
View Article and Find Full Text PDFLineage tracing studies suggest that the placenta is not a de novo source of hematopoietic stem cells.
PLoS Biol
January 2025
Cardiovascular Institute and Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America.
Definitive hematopoietic stem and progenitor cells (HSPCs) arise from a small number of hemogenic endothelial cells (HECs) within the developing embryo. Understanding the origin and ontogeny of HSPCs is of considerable interest and potential therapeutic value. It has been proposed that the murine placenta contains HECs that differentiate into HSPCs.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!