No abstract

The isolation of secondary metabolites from a methanolic extract of Kaempferia rotunda yielded 12 compounds (1-12), including a new polyoxygenated cyclohexane compound, (-)-3-acetyl-4-benzoyl-1-benzoyloxymethyl-1,6-diepoxycyclohexan-2,3,4,5-tetrol (1). The structures of the isolated compounds were determined based on their spectroscopic data and comparison with references. All of the isolated compounds were tested for their cytotoxic activity against pancreatic (PSN-1) and breast (MDA-MB231) cancer cell lines. Compound 12 showed moderate cytotoxic activity against PSN-1 and MDA-MB231 without showing any cytotoxicity against the normal cell line, TIG-3.

Polymicrobial wound infections are a major cause of infectious disease-related morbidity and mortality worldwide. In this study, we prepared a nitric oxide (NO)-releasing oxidized bacterial cellulose/chitosan (BCTO/CHI) crosslinked hydrogel to effectively treat polymicrobial wound infections. Linear polyethyleneimine diazeniumdiolate (PEI/NO) was used as the NO donor. The aldehyde group of BCTO and the amine of CHI were used as crosslinked hydrogel-based materials; their high NO loading capacity and antibacterial activity on the treatment of polymicrobial-infected wounds were investigated. The blank and NO-loaded crosslinked hydrogels, namely BCTO-CHI and BCTO-CHI-PEI/NO, were characterized according to their morphologies, chemical properties, and drug loading. BCTO-CHI-PEI/NO exhibited sustained drug release over four days. The high NO loading of BCTO-CHI-PEI/NO enhanced the bactericidal efficacy against multiple bacteria compared with BCTO-CHI. Furthermore, compared with blank hydrogels, BCTO-CHI-PEI/NO has a favorable rheological property due to the addition of a polymer-based NO donor. Moreover, BCTO-CHI-PEI/NO significantly accelerated wound healing and re-epithelialization in a mouse model of polymicrobial-infected wounds. We also found that both crosslinked hydrogels were nontoxic to healthy mammalian fibroblast cells. Therefore, our data suggest that the BCTO-CHI-PEI/NO developed in this study improves the efficacy of NO in the treatment of polymicrobial wound infections.

ABSTRAKJahe merah (Zingiber officinalle var. Amarum) merupakan salah satu tumbuhan yang banyak digunakan sebagai bumbu makanan sehari-hari dan juga berkhasiat sebagai obat tradisional untuk mengobati berbagai penyakit termasuk asam urat. Penelitian ini bertujuan untuk menguji aktifitas biologi dari jahe merah dan mengisolasi dan mengidentifikasi senyawa bioaktif yang tekandung di dalam ekstraknya. Berdasarkan penelitian yang dilakukan terhadap ekstrak etanol jahe merah memperlihatkan kemampuannya dalam menurunkan asam urat pada kelinci yang diinduksi dengan kalium bromat (KBrO3) pada konsentrasi 0,6 b/v yang diamati pada 1 dan 3 jam setelah diinduksi dan dibandingkan dengan allopurinol yang digunakan sebagai positif kontrolnya. Ekstrak etanol jahe merah juga memperlihatkan hubungan konsentrasi dengan penurunan asam urat pada kelinci. Isolasi senyawa bioaktif dalam tanaman ini telah dilakukan dengan menggunakan metode kromatografi dan identifikasi stukturnya didasarkan pada analisis data spektrofotometri dan NMR. Berdasarkan data spectra yang diperoleh terhadap senyawa yang paling dominan yang berhasil diisolasi dan diidentifikasi adalah senyawa 6-gingerol. Hal ini menunjukkan bahwa ekstrak etanol jahe merah memiliki aktifitas dalam menurunkan kadar asam urat dengan senyawa utama 6-gingerol.

No abstract

No abstract

No abstract

Background and Objective: Skin disease and inflammation are often treated with traditional medicine, which has been the case since ancient times. Controlling activation and gene expression of inflammatory signalling pathways, such as the Nuclear Factor-kappa B (NF-κB) pathway, is important for protecting the skin from adverse inflammation and preventing the acceleration of pathologic disease processes. Therefore, the present study aimed to identify natural anti-inflammatory products that could target NF-κB activity by screening Indonesian medicinal plants, with particular focus given to Kaempferia galanga extracts as promising candidates. Material and Methods: We investigated the inhibition of NF-κB activation in 35 natural medicinal plants (1-35) cultivated in Indonesia traditionally used to treat skin disease symptoms. Specifically, a 4T1 cell line, a breast cancer cell line and RAW 264.7 macrophages expressing the firefly luciferase gene under the control of an NF-κB response element were used for this purpose. Inhibition of NF-κB activity and cell viability were determined by reporter assays and WST-8 methods. Result: Based on the screening of 35 natural medicinal plants, we identified two K. galanga extracts (29 and 35) from different rhizome types that strongly suppressed NF-κB activity without affecting cell viability. In further investigation of the anti-inflammatory effects of these extracts, Tumour Necrosis Factor-Related Apoptosis-Inducing Ligand (TRAIL) was found to cause cellular damage to human HaCaT keratinocytes: however, both extracts 29 and 35 from K. galanga had protective effects against TRAIL. Conclusion: Collectively, these results indicate that the identified K. galanga extracts represent potential candidates for the development of novel anti-inflammatory natural medicines.