Streptomyces venezuelae ISP5230 is recognized for the production of chloramphenicol and the jadomycin family of natural products. The jadomycins are angucycline natural products containing a unique oxazolone ring incorporating an amino acid present in the minimal culture media. Substitution of different amino acids results in products of varying biological activity. Analysis of cultures of S. venezuelae ISP5230 incubated with l- and d-norvaline and l- and d-norleucine indicated that only the d-configured amino acids were incorporated into the natural products. Subsequently, jadomycin DNV and jadomycin DNL were isolated and characterized (titers 4 and 9 mg L(-1), respectively). The compounds were evaluated in the National Cancer Institute cell line cancer growth inhibition and cytotoxicity screens, for antimicrobial activity against selected Gram-positive and Gram-negative bacteria, and as DNA-cleavage agents in vitro.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/np200689w | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Modulation of inflammatory signaling in vitamin E metabolites and its therapeutic implications.
Free Radic Res
January 2025
Department of Biochemistry, Faculty of Medicine, Marmara University, 34854, Istanbul, Turkiye.
Naturally occurring vitamin E is a lipophilic plant-derived molecule corresponding to the 2R forms of alpha-tocopherol. A series of natural analogs or tocochromanols are present in nature, including β-, γ- and δ-tocopherol (βT, γT, δT), the corresponding tocotrienols (αTE, βTE, γTE, δTE) and tocomonoenols. Differences between these analogs as lipophilic antioxidants and modulators of molecular processes suggest specific therapeutic properties against various disorders associated with acute and chronic inflammation.
View Article and Find Full Text PDFAssociation Between Coffee Intake and Common Mental Disorders: Insights From Genetic Analysis.
CNS Neurosci Ther
January 2025
Affiliated Mental Health Center of Jiangnan University, Wuxi Central Rehabilitation Hospital, Wuxi, China.
The study found a significant causal relationship between coffee intake and obsessive-compulsive disorder, showing a negative correlation. There was no causal relationship between coffee intake and other mental disorders. The sensitivity analysis test found no pleiotropy affecting the results, and no single nucleotide polymorphism had a major impact on the robustness of the results, indicating that the results are stable and reliable.
View Article and Find Full Text PDFAction and immunomodulatory mechanisms, formulations, and safety concerns of probiotics.
Biosci Microbiota Food Health
August 2024
Department of Food Science, Széchenyi István University, Mosonmagyaróvár, 9200, Hungary.
The global probiotics market has been continuously growing, driven by consumer demand for immune-enhancing functional foods, dietary supplements, and natural therapeutics for gastrointestinal and gut function-mediated diseases. Probiotic microorganisms represent a diverse group of strains with complex but generalized mechanistic patterns. This review describes the various immunomodulatory mechanisms by which probiotics exert their effects, including the competitive exclusion of pathogenic microbes, production of antimicrobial substances, modulation of the immune system, and improvement of gut barrier function.
View Article and Find Full Text PDFThe role of avocado plant and its derivatives in the management of diabetes mellitus: a natural approach to glycemic control.
J Diabetes Metab Disord
June 2025
Department of Physiology, Kampala International University, Western Campus, Ishaka, Uganda.
Purpose: Diabetes mellitus is a global health challenge that leads to severe complications, negatively impacting overall health, life expectancy, and quality of life. Herbal medicines, valued for their accessibility and therapeutic benefits with minimal side effects, have been promoted as potential treatments. Managing conditions like diabetes, characterized by free radical production and cytokine-driven inflammation, is vital due to the active components in plants that exert direct pharmacological effects.
View Article and Find Full Text PDFNigerian medicinal plants with potential anticancer activity-a review.
Explor Target Antitumor Ther
December 2024
Center for Natural Products Discovery (CNPD), School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Liverpool L3 3AF, UK.
Despite the fact that life expectancies are increasing and the burden of infectious diseases is decreasing, global cancer incidence rates are on the rise. Cancer outcome metrics are dismal for low- and middle-income countries (LMICs), including sub-Saharan Africa, where adequate resources and infrastructure for cancer care and control are lacking. Nigeria, the most populous country in Africa, exemplifies the miserable situation.
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!