By means of UV-VIS absorption and fluorescence spectroscopy, we demonstrate that the photosensitizer hypericin (Hyp) interacts nonspecifically with low-density lipoproteins (LDL), most probably with the lipid fraction of LDL. The molar ratio of monomeric Hyp binding to nonoxidized LDL and mildly oxidized LDL is 30:1. Increasing the Hyp concentration further leads to the formation of Hyp aggregates inside the LDL molecule. We also demonstrate that photoactivated Hyp oxidizes LDL in a light dose and excitation wavelength dependent manner. The level of oxidation of LDL depends on the amount of Hyp inside the LDL molecule. The maximum of the photosensitized oxidation of the LDL by Hyp is achieved for a 30:1 molar ratio, which corresponds to the maximum concentration of monomeric form of Hyp in LDL.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1562/2005-04-28-RA-503 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effect of light fasting diet therapy on lipid metabolism and sex hormone levels in patients with polycystic ovary syndrome combined with infertility.
Gynecol Endocrinol
December 2025
Department of Gynecology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, China.
Objective: To investigate the effects of light fasting diet therapy, including flaxseed powder supplementation, on lipid metabolism and sex hormone levels in patients with polycystic ovary syndrome (PCOS) combined with infertility.
Methods: A total of 104 PCOS patients with combined infertility were divided into the control group ( = 52) and intervention group ( = 52) using a random number table method. Over a two-month study period, the control group received light fasting diet therapy with rice flour as a placebo, while the intervention group received light fasting diet therapy supplemented with flaxseed powder.
Elevated Platelet-to-Lymphocyte Ratio as a Predictor of All-Cause and Cardiovascular Mortality in Hypertensive Individuals.
J Clin Hypertens (Greenwich)
January 2025
Department of Cardiology, Fifth Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China.
The platelet-to-lymphocyte ratio (PLR) has been proposed as a promising inflammatory biomarker, with potential implications for cardiovascular prognosis. However, its association with mortality outcomes in hypertensive individuals is not fully elucidated. This investigation sought to clarify the linkage between PLR and both overall and cardiovascular mortality in hypertensive individuals.
View Article and Find Full Text PDFGenetic association analysis of lipid-lowering drug target genes in chronic kidney disease.
Front Endocrinol (Lausanne)
January 2025
Department of Urology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou Medical University, Jinzhou, Liaoning, China.
Objective: The impact of lipid-lowering medications on chronic kidney disease (CKD) remains a subject of debate. This Mendelian randomization (MR) study aims to elucidate the potential effects of lipid-lowering drug targets on CKD development.
Methods: We extracted 11 genetic variants encoding targets of lipid-lowering drugs from published genome-wide association study (GWAS) summary statistics, encompassing LDLR, HMGCR, PCSK9, NPC1L1, APOB, ABCG5/ABCG8, LPL, APOC3, ANGPTL3, and PPARA.
The Hypertriglyceridemic Waist Phenotype is Associated with an Adverse Cardiometabolic Profile in this Cohort of Nigerians.
Niger Med J
January 2025
Department Of Medicine, College of Medicine, University of Lagos, Nigeria & Consultant Cardiologist, Lagos University Teaching Hospital, Lagos, Nigeria.
Background: The hypertriglyceridemic waist (HTGW) phenotype was introduced as a means of identifying individuals at risk of developing metabolic syndrome as well as cardiovascular diseases and diabetes. However, studies surrounding the prevalence of the phenotype and its relationship with established markers of cardiometabolic risk, especially in the Nigerian population, remain sparse. This study aimed to determine the prevalence of the HTGW phenotype and explore its relationship with cardiovascular risk markers, namely Castelli Risk Indices I and II (CRI-I and CRI-II), Atherogenic Index of Plasma (AIP) and serum triglyceride-HDL cholesterol ratio (TG/HDL).
View Article and Find Full Text PDFSerum lipid profile in systemic lupus erythematosus.
Front Immunol
January 2025
Department of Rheumatology and Clinical Immunology, the First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China.
Background: Dyslipidemia presents in various autoimmune diseases, and the serum lipid profile in systemic lupus erythematosus (SLE) has not yet been clearly defined. This study aims to evaluate the level of serum lipids in patients with SLE.
Methods: A case-control study evaluated four conventional sera lipids-total cholesterol (TC), triglyceride (TG), high-density lipoprotein (HDL), and low-density lipoprotein (LDL)-in patients with SLE compared to healthy controls (HCs).
Want 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!