Three new polyhydroxysterols, named muriflasteroids A-C (1-3) were isolated from the South China Sea gorgonian Muriceopsis flavida, together with sixteen known analogs, cholest-3β,5α,6β-triol,3β-acetate (4), 5α-methoxycholest-3β,6β-diol (5), (22E)-cholest-22-en-3β,5α,6β-triol (6), cholest-3β,5α,6β-triol (7), (22E)-24-norcholest-22-en-3β,5α,6β-triol (8), (22E,24S)-ergost-22-en-3β,5α,6β-triol (9), ergost-24(28)-en-3β,5α,6β-triol (10), (22E)-cholest-7,22-dien-3β,5α,6β-triol (11), cholest-7-en-3β,5α,6β-triol (12), (22E)-24-norcholest-7,22-dien-3β,5α,6β-triol (13), ergost-7,24(28)-dien-3β,5α,6β-triol (14), (22E,24R)-ergost-7,22-dien-3β,5α,6β-triol (15), (22E)-cholest-22-en-1β,3β,5α,6β-tetrol (16), (22E)-24-norcholest-22-en-1β,3β,5α,6β-tetrol (17), cholest-1β,3β,5α,6β-tetrol (18), and (24ξ)-ergost-1β,3β,5α,6β-tetrol (19). The structures of the new compounds were elucidated by detailed spectroscopic analysis in combination with comparison of reported data. All the compounds are reported for the first time from the animal. In the bioassay in vitro, these compounds exhibited different levels of growth inhibition activity against A549 and MG63 cell lines. In particular, compound 18 displayed a considerable activity, being similar as that of positive control adriamycin. An annexin V analysis indicated that compounds 7 and 18 can significantly induce apoptosis in A549 cell, and compound 7 is more potent in the induction of apoptosis. Preliminary structure-activity analysis suggests that the acetylation on 3-OH and appearance of Δ⁷ may decrease the activity while substitution of 1-OH and the nature of side chain may also play an important role in the activity. Methylation of 5-OH contributed a little to the activity.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.steroids.2012.10.003 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A machine learning-based model to predict POD24 in follicular lymphoma: a study by the Chinese workshop on follicular lymphoma.
Biomark Res
January 2025
Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, 361003, P.R. China.
Background: Disease progression within 24 months (POD24) significantly impacts overall survival (OS) in patients with follicular lymphoma (FL). This study aimed to develop a robust predictive model, FLIPI-C, using a machine learning approach to identify FL patients at high risk of POD24.
Methods: A cohort of 1,938 FL patients (FL1-3a) from seventeen centers nationwide in China was randomly divided into training and internal validation sets (2:1 ratio).
Identification of a pathogenic SDHD mutation in a Chinese family with hereditary head and neck paraganglioma: implications for genetic counseling and management.
World J Surg Oncol
January 2025
Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tiantan Hospital, Capital Medical University, No. 119, South Fourth Ring Road West, Fengtai District, Beijing, 100070, China.
Background: This study aims to identify a pathogenic SDHD mutation associated with hereditary head and neck paraganglioma (HNPGL) in a Chinese family and to explore its implications for genetic counseling.
Methods: The study involved a family with 15 members spanning three generations. A 31-year-old patient (II-4) was diagnosed with a left parotid gland tumor and a right carotid body tumor, while both the father and elder sister had right carotid body tumors, and the third sister had bilateral carotid body tumors.
Screening for retinopathy of prematurity in China: a five-year cohort study in seven screening centers.
BMC Ophthalmol
January 2025
Department of Ophthalmology, Peking University People's Hospital, Beijing Key Laboratory of Ocular Disease and Optometry Science, Beijing, China.
Background: To analyze the demographic characteristics of retinopathy of prematurity (ROP) in China, attempting to propose optimized screening criteria and hopefully providing valuable information for future updates to the ROP guideline.
Methods: A multicenter, retrospective-cohort study was conducted. The study included infants born between January 1, 2018, and July 31, 2023, who underwent ROP screening and were diagnosed with ROP at seven screening centers in China.
circTP63-N suppresses the proliferation and metastasis of nasopharyngeal carcinoma via engaging with HSP90AB1 to modulate the YAP1/Hippo signaling pathway.
Sci China Life Sci
December 2024
NHC Key Laboratory of Carcinogenesis and Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410078, China.
Circular RNAs (circRNAs) play pivotal roles in the development and progression of various diseases, including malignant tumors. However, the biological functions and the underlying mechanisms of many circRNAs remain elusive. In this study, we identified a novel circRNA, circTP63-N, generated through the splicing of exons 2-4 of the TP63 gene in nasopharyngeal carcinoma (NPC).
View Article and Find Full Text PDFNovel variants of FSIP2 and SPEF2 cause varying degrees of spermatozoa damage in MMAF patients and favorable ART outcomes.
J Assist Reprod Genet
January 2025
NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, School of Basic Medical Sciences, Central South University, Changsha, China.
Purpose: This study identified novel variants of the FSIP2 and SPEF2 genes in multiple morphological abnormalities of the sperm flagella (MMAF) patients and to investigate the potential effect of variations on male infertility and assisted reproductive outcomes.
Methods: Whole-exome sequencing was performed in 106 Chinese MMAF patients. The discovered variants were evaluated in silico and confirmed by Sanger sequencing.
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!