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Zahel P, Bruggink V, Hülsmann J, Steiniger F, Hofstetter RK, Heinzel T, Beekmann U, Werz O, Kralisch D. Exploring Microemulsion Systems for the Incorporation of Glucocorticoids into Bacterial Cellulose: A Novel Approach for Anti-Inflammatory Wound Dressings. Pharmaceutics 2024; 16:504. [PMID: 38675165 PMCID: PMC11054342 DOI: 10.3390/pharmaceutics16040504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 03/05/2024] [Accepted: 03/20/2024] [Indexed: 04/28/2024] Open
Abstract
The effective pharmacological treatment of inflamed wounds such as pyoderma gangraenosum remains challenging, as the systemic application of suitable drugs such as glucocorticoids is compromised by severe side effects and the inherent difficulties of wounds as drug targets. Furthermore, conventional semi-solid formulations are not suitable for direct application to open wounds. Thus, the treatment of inflamed wounds could considerably benefit from the development of active wound dressings for the topical administration of anti-inflammatory drugs. Although bacterial cellulose appears to be an ideal candidate for this purpose due to its known suitability for advanced wound care and as a drug delivery system, the incorporation of poorly water-soluble compounds into the hydrophilic material still poses a problem. The use of microemulsions could solve that open issue. The present study therefore explores their use as a novel approach to incorporate poorly water-soluble glucocorticoids into bacterial cellulose. Five microemulsion formulations were loaded with hydrocortisone or dexamethasone and characterized in detail, demonstrating their regular microstructure, biocompatibility and shelf-life stability. Bacterial cellulose was successfully loaded with the formulations as confirmed by transmission electron microscopy and surprisingly showed homogenous incorporation, even of w/o type microemulsions. High and controllable drug permeation through Strat-M® membranes was observed, and the anti-inflammatory activity for permeated glucocorticoids was confirmed in vitro. This study presents a novel approach for the development of anti-inflammatory wound dressings using bacterial cellulose in combination with microemulsions.
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Affiliation(s)
- Paul Zahel
- JeNaCell GmbH—An Evonik Company, 07745 Jena, Germany; (P.Z.); (V.B.); (U.B.)
- Department of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich Schiller University, 07743 Jena, Germany; (R.K.H.); (O.W.)
| | - Vera Bruggink
- JeNaCell GmbH—An Evonik Company, 07745 Jena, Germany; (P.Z.); (V.B.); (U.B.)
- Department of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich Schiller University, 07743 Jena, Germany; (R.K.H.); (O.W.)
| | - Juliana Hülsmann
- Institute of Biochemistry and Biophysics, Center for Molecular Biomedicine, Friedrich Schiller University, 07745 Jena, Germany; (J.H.); (T.H.)
| | - Frank Steiniger
- Electron Microscopy Center, University Hospital Jena, Friedrich Schiller University, 07743 Jena, Germany;
| | - Robert K. Hofstetter
- Department of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich Schiller University, 07743 Jena, Germany; (R.K.H.); (O.W.)
| | - Thorsten Heinzel
- Institute of Biochemistry and Biophysics, Center for Molecular Biomedicine, Friedrich Schiller University, 07745 Jena, Germany; (J.H.); (T.H.)
| | - Uwe Beekmann
- JeNaCell GmbH—An Evonik Company, 07745 Jena, Germany; (P.Z.); (V.B.); (U.B.)
| | - Oliver Werz
- Department of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich Schiller University, 07743 Jena, Germany; (R.K.H.); (O.W.)
| | - Dana Kralisch
- JeNaCell GmbH—An Evonik Company, 07745 Jena, Germany; (P.Z.); (V.B.); (U.B.)
- Evonik Operations GmbH, 45128 Essen, Germany
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Pappas G, Arnaud F, Haque A, Kino T, Facemire P, Carroll E, Auker C, McCarron R, Scultetus A. Infusion of solutions of pre-irradiated components in rats. ACTA ACUST UNITED AC 2016; 68:355-63. [PMID: 27210074 DOI: 10.1016/j.etp.2016.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 04/02/2016] [Accepted: 05/08/2016] [Indexed: 11/26/2022]
Abstract
INTRODUCTION The objective of this study was to conduct a 14-day toxicology assessment for intravenous solutions prepared from irradiated resuscitation fluid components and sterile water. METHODS Healthy Sprague Dawley rats (7-10/group) were instrumented and randomized to receive one of the following Field IntraVenous Resuscitation (FIVR) or commercial fluids; Normal Saline (NS), Lactated Ringer's, 5% Dextrose in NS. Daily clinical observation, chemistry and hematology on days 1,7,14, and urinalysis on day 14 were evaluated for equivalence using a two sample t-test (p<0.05). A board-certified pathologist evaluated organ histopathology on day 14. RESULTS Equivalence was established for all observation parameters, lactate, sodium, liver enzymes, creatinine, WBC and differential, and urinalysis values. Lack of equivalence for hemoglobin (p=0.055), pH (p=0.0955), glucose (p=0.0889), Alanine-Aminotransferase (p=0.1938), albumin (p=0.1311), and weight (p=0.0555, p=0.1896), was deemed not clinically relevant due to means within physiologically normal ranges. Common microscopic findings randomly distributed among animals of all groups were endocarditis/myocarditis and pulmonary lesions. DISCUSSION These findings are consistent with complications due to long-term catheter use and suggest no clinically relevant differences in end-organ toxicity between animals infused with FIVR versus commercial fluids.
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Affiliation(s)
- Georgina Pappas
- Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue, Silver Spring, MD 20910, United States, United States.
| | - Francoise Arnaud
- Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue, Silver Spring, MD 20910, United States, United States; Uniformed Services University of the Health Science, Department of Surgery, 4301 Jones Bridge Rd Bethesda, MD 20814, United States, United States.
| | - Ashraful Haque
- Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue, Silver Spring, MD 20910, United States, United States.
| | - Tomoyuki Kino
- Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue, Silver Spring, MD 20910, United States, United States.
| | - Paul Facemire
- Naval Medical Research Center, Pathology, Research Services Directorate, 503 Robert Grant Avenue, Silver Spring, MD 20910, United States, United States.
| | - Erica Carroll
- Naval Medical Research Center, Pathology, Research Services Directorate, 503 Robert Grant Avenue, Silver Spring, MD 20910, United States, United States.
| | - Charles Auker
- Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue, Silver Spring, MD 20910, United States, United States.
| | - Richard McCarron
- Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue, Silver Spring, MD 20910, United States, United States; Uniformed Services University of the Health Science, Department of Surgery, 4301 Jones Bridge Rd Bethesda, MD 20814, United States, United States.
| | - Anke Scultetus
- Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue, Silver Spring, MD 20910, United States, United States; Uniformed Services University of the Health Science, Department of Surgery, 4301 Jones Bridge Rd Bethesda, MD 20814, United States, United States.
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The influence of ionizing radiation, temperature, and light on eplerenone in the solid state. BIOMED RESEARCH INTERNATIONAL 2014; 2014:571376. [PMID: 25162016 PMCID: PMC4137688 DOI: 10.1155/2014/571376] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 07/11/2014] [Indexed: 11/17/2022]
Abstract
Eplerenone was subjected to the influence of ionizing radiation in the form of a high-energy electron beam (25–400 kGy), high temperature (90°C RH 0% and 60°C RH 76.4%), and light (6 mln lux h). An HPLC method was used to determine the content of eplerenone and to establish the impurity profile of all samples. As eplerenone was found to be a compound of great resistance to the above stress factors with the exception of high doses of ionizing radiation (≥200 kGy) when its degradation was above 1%, it is possible to sterilize eplerenone by radiation method with the standard dose of 25 kGy. Based on the analysis of impurities and degradation products, the mechanism of radiodegradation was demonstrated to differ from the mechanisms of photo- and thermodegradation. The observation that the DSC curves for the nondegraded and degraded samples of eplerenone were significantly different only under exposure to the electron beam confirmed the applicability of DSC for studies of radiolytic degradation of eplerenone.
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Abstract
AbstractChromatographic properties of five steroid drugs: cortisone, hydrocortisone, methylprednisolone, prednisolone and norgestrel have been studied by normal-, reversed-phase and hydrophilic neutral cyano-bonded silica stationary phase with five binary mobile phases (acetonitrile-water, acetonitrile-DMSO, acetonitrile-methanol, acetone-petroleum ether, acetone-water) in which the concentration of organic modifier was varied from 0 to 100% (v/v). This study reports the optimization of steroid hormones separation. Chromatographic retention data and possible retention mechanisms are discussed. Separation abilities of mobile and stationary phases were studied using the principal component analysis method. The best separation of methylprednisolone and prednisolone is with a chromatographic system included silica gel as stationary phase and mixture of acetonitrile and DMSO (10:90 v/v). These two anti-inflammatory drugs can be fast separated from norgestrel when CN is used as stationary phase and acetone and water (40:60 v/v) as mobile phase. The highest values of the parameter Δ(ΔG°) and alfa for cortisone and hydrocortisone was observed in case of using CN as stationary phase and water-acetonitryle (40:60 v/v) as mobile phase.
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