Drug Synergism

Publication Title: 
Journal of Basic Microbiology

Ethanolic extracts and some fractions from 10 Indian medicinal plants, known for antibacterial activity, were investigated for their ability to inhibit clinical isolates of beta-lactamase producing methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-sensitive S. aureus (MSSA). Synergistic interaction of plant extracts with certain antibiotics was also evaluated. The MRSA test strains were found to be multi-drug resistant and also exhibited high level of resistance to common beta-lactam antibiotics.

Author(s): 
Aqil, Farrukh
Khan, M. Sajjad A.
Owais, Mohd
Ahmad, Iqbal
Publication Title: 
Methods and Findings in Experimental and Clinical Pharmacology

In search of broad-spectrum antibacterial activity from traditionally used Indian medicinal plants, 66 ethanolic plant extracts were screened against nine different bacteria. Of these, 39 extracts demonstrated activity against six or more test bacteria. Twelve extracts showing broad-spectrum activity were tested against specific multidrug-resistant (MDR) bacteria, methicillin-resistant Staphylococcus aureus (MRSA) and extended spectrum beta-lactamases (ESbetaL)-producing enteric bacteria.

Author(s): 
Aqil, F.
Ahmad, I.
Publication Title: 
BMC complementary and alternative medicine

BACKGROUND: Acinetobacter baumannii is well-recognized as an important nosocomial pathogen, however, due to their intrinsic resistance to several antibiotics, treatment options are limited. Synergistic effects between antibiotics and medicinal plants, particularly their active components, have intensively been studied as alternative approaches. METHODS: Fifty-one ethanol extracts obtained from 44 different selected medicinal plant species were tested for resistance modifying agents (RMAs) of novobiocin against A. baumannii using growth inhibition assay.

Author(s): 
Phatthalung, Pinanong Na
Chusri, Sasitorn
Voravuthikunchai, Supayang P.
Publication Title: 
PloS One

The number of fully active antibiotic options that treat nosocomial infections due to multidrug-resistant Acinetobacter baumannii (A. baumannii) is extremely limited. Magnolia officinalis, Mahonia bealei, Rabdosia rubescens, Rosa rugosa, Rubus chingii, Scutellaria baicalensis, and Terminalia chebula plant extracts were previously shown to have growth inhibitory activity against a multidrug-resistant clinical strain of A. baumannii.

Author(s): 
Miyasaki, Yoko
Rabenstein, John D.
Rhea, Joshua
Crouch, Marie-Laure
Mocek, Ulla M.
Kittell, Patricia Emmett
Morgan, Margie A.
Nichols, Wesley Stephen
Van Benschoten, M. M.
Hardy, William David
Liu, George Y.
Publication Title: 
Journal of Microbiology (Seoul, Korea)

In this study, a tropical endophytic fungus, Alternaria alternata Tche-153 was isolated from a Thai medicinal plant Terminalia chebula Rezt. The ethyl acetate extract prepared from the fermentation broth exhibited significant ketoconazole-synergistic activity against Candida albicans. Bioassay-directed fractionation of the ethyl acetate extract led to the isolation of altenusin (1), isoochracinic acid (2), and altenuic acid (3) together with 2,5-dimethyl-7-hydroxychromone (4).

Author(s): 
Phaopongthai, Jatuporn
Wiyakrutta, Suthep
Meksuriyen, Duangdeun
Sriubolmas, Nongluksna
Suwanborirux, Khanit
Publication Title: 
Biological & Pharmaceutical Bulletin

Candida albicans is one of the most prevalent human opportunistic pathogens. C. albicans undergoes a yeast-to-hyphal transition that has been identified as a virulence factor as well as a critical element for mature biofilm formation. A previous study in our lab showed retigeric acid B (RAB), a lichen derived pentacyclic triterpenoid, displayed synergistic antifungal activity with azoles. We now showed that this combination also proved to be adequate in combating the formation of hyphae in vitro.

Author(s): 
Chang, Wenqiang
Li, Ying
Zhang, Li
Cheng, Aixia
Liu, Yongqing
Lou, Hongxiang
Publication Title: 
PloS One

BACKGROUND: Zinc deficiency due to poor nutrition or genetic mutations in zinc transporters is a global health problem and approaches to providing effective dietary zinc supplementation while avoiding potential toxic side effects are needed. METHODS/PRINCIPAL FINDINGS: Conditional knockout of the intestinal zinc transporter Zip4 (Slc39a4) in mice creates a model of the lethal human genetic disease acrodermatitis enteropathica (AE).

Author(s): 
Geiser, Jim
De Lisle, Robert C.
Finkelstein, David
Adlard, Paul A.
Bush, Ashley I.
Andrews, Glen K.
Publication Title: 
Indian Journal of Physiology and Pharmacology
Author(s): 
Menon, M. M.
Iyer, K. S.
Publication Title: 
Indian Journal of Physiology and Pharmacology
Author(s): 
Iyer, K. S.
Publication Title: 
Biochemical Pharmacology
Author(s): 
Azarnoff, D. L.
Grady, H. J.
Svoboda, D. J.

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