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Voss GT, Davies MJ, Schiesser CH, de Oliveira RL, Nornberg AB, Soares VR, Barcellos AM, Luchese C, Fajardo AR, Wilhelm EA. Treating atopic-dermatitis-like skin lesions in mice with gelatin-alginate films containing 1,4-anhydro-4-seleno-d-talitol (SeTal). Int J Pharm 2023:123174. [PMID: 37364783 DOI: 10.1016/j.ijpharm.2023.123174] [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: 03/21/2023] [Revised: 06/20/2023] [Accepted: 06/21/2023] [Indexed: 06/28/2023]
Abstract
New compounds and pharmacological strategies offer alternatives for treating chronic skin diseases, such as atopic dermatitis (AD). Here, we investigated the incorporation of 1,4-anhydro-4-seleno-d-talitol (SeTal), a bioactive seleno-organic compound, in gelatin and alginate (Gel-Alg) polymeric films as a strategy for improving the treatment and attenuation of AD-like symptoms in a mice model. Hydrocortisone (HC) or vitamin C (VitC) were incorporated with SeTal in the Gel-Alg films, and their synergy was investigated. All the prepared film samples were able to retain and release SeTal in a controlled manner. In addition, appreciable film handling facilitates SeTal administration. A series of in-vivo/ex-vivo experiments were performed using mice sensitized with dinitrochlorobenzene (DNCB), which induces AD-like symptoms. Long-term topical application of the loaded Gel-Alg films attenuated disease symptoms and pruritus, with suppression of the levels of inflammatory markers, oxidative damage, and the skin lesions associated with AD. Moreover, the loaded films showed superior efficiency in attenuating the analyzed symptoms when compared to hydrocortisone (HC) cream, a traditional AD-treatment, and decreased the inherent drawbacks of this compound. In short, incorporating SeTal (by itself or with HC or VitC) in biopolymeric films provides a promising alternative for the long-term treatment of AD-type skin diseases.
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Affiliation(s)
- Guilherme T Voss
- Laboratório de Pesquisa em Farmacologia Bioquímica (LaFarBio), Universidade Federal de Pelotas (UFPel), Campus Capão do Leão, 96010-900, Pelotas-RS, Brazil
| | - Michael J Davies
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3, 2200, Copenhagen, Denmark; Seleno Therapeutics Pty. Ltd., Brighton East, VIC, 3187, Australia
| | - Carl H Schiesser
- Seleno Therapeutics Pty. Ltd., Brighton East, VIC, 3187, Australia
| | - Renata L de Oliveira
- Laboratório de Pesquisa em Farmacologia Bioquímica (LaFarBio), Universidade Federal de Pelotas (UFPel), Campus Capão do Leão, 96010-900, Pelotas-RS, Brazil
| | - Andresa B Nornberg
- Laboratório de Tecnologia e Desenvolvimento de Compósitos e Materiais Poliméricos (LaCoPol), Universidade Federal de Pelotas (UFPel), Campus Capão do Leão s/n, 96010-900, Pelotas-RS, Brazil
| | - Victória R Soares
- Laboratório de Tecnologia e Desenvolvimento de Compósitos e Materiais Poliméricos (LaCoPol), Universidade Federal de Pelotas (UFPel), Campus Capão do Leão s/n, 96010-900, Pelotas-RS, Brazil
| | - Angelita M Barcellos
- Laboratório de Tecnologia e Desenvolvimento de Compósitos e Materiais Poliméricos (LaCoPol), Universidade Federal de Pelotas (UFPel), Campus Capão do Leão s/n, 96010-900, Pelotas-RS, Brazil
| | - Cristiane Luchese
- Laboratório de Pesquisa em Farmacologia Bioquímica (LaFarBio), Universidade Federal de Pelotas (UFPel), Campus Capão do Leão, 96010-900, Pelotas-RS, Brazil
| | - André R Fajardo
- Laboratório de Tecnologia e Desenvolvimento de Compósitos e Materiais Poliméricos (LaCoPol), Universidade Federal de Pelotas (UFPel), Campus Capão do Leão s/n, 96010-900, Pelotas-RS, Brazil.
| | - Ethel A Wilhelm
- Laboratório de Pesquisa em Farmacologia Bioquímica (LaFarBio), Universidade Federal de Pelotas (UFPel), Campus Capão do Leão, 96010-900, Pelotas-RS, Brazil.
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Voss GT, de Oliveira RL, Davies MJ, Domingues WB, Campos VF, Soares MP, Luchese C, Schiesser CH, Wilhelm EA. Suppressive effect of 1,4-anhydro-4-seleno-D-talitol (SeTal) on atopic dermatitis-like skin lesions in mice through regulation of inflammatory mediators. J Trace Elem Med Biol 2021; 67:126795. [PMID: 34091240 DOI: 10.1016/j.jtemb.2021.126795] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 05/21/2021] [Accepted: 05/25/2021] [Indexed: 11/25/2022]
Abstract
BACKGROUND Atopic dermatitis (AD) is a multifactorial chronic inflammatory disease that affects ∼20 % of children and 3% of adults globally and is generally treated by the topical application of steroidal drugs that have undesirable side-effects. The development of alternative therapies is therefore an important objective. The present study investigated the effects of topical treatment with a novel water-soluble selenium-containing carbohydrate derivative (4-anhydro-4-seleno-D-tatitol, SeTal) on the symptoms and inflammatory parameters in an AD mouse model. METHODS Mice were sensitized by applying 2,4-dinitrochlorobenzene (DNCB) to their dorsal skin on days 1-3, then further challenged on their ears and dorsal skin on days 14, 17, 20, 23, 26, and 29. SeTal (1 and 2%) or hydrocortisone (1%) was applied topically to the backs of the mice from days 14-29, and skin severity scores and scratching behavior determined on day 30. The mice were euthanized, and their ears and dorsal skin removed to quantify inflammatory parameters, edema, myeloperoxidase (MPO) activity, and AD-associated cytokines (tumor necrosis factor alpha (TNF-α), interleukins (IL)-18, and IL-33). RESULTS DNCB treatment induced skin lesions and increased the scratching behavior, ear edema, MPO activity (ear and dorsal skin), and cytokine levels in dorsal skin. Topical application of SeTal improved inflammatory markers (cytokine levels and MPO activity), cutaneous severity scores, and scratching behavior. CONCLUSION The efficacy of SeTal was satisfactory in the analyzed parameters, showing similar or better results than hydrocortisone. SeTal appears to be therapeutically advantageous for the treatment and control of AD.
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Affiliation(s)
- Guilherme T Voss
- Programa de Pós-graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica (LaFarBio), Grupo de Pesquisa em Neurobiotecnologia (GPN), Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Pelotas, CEP 96010-900, RS, Brazil
| | - Renata L de Oliveira
- Programa de Pós-graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica (LaFarBio), Grupo de Pesquisa em Neurobiotecnologia (GPN), Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Pelotas, CEP 96010-900, RS, Brazil
| | - Michael J Davies
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3, 2200, Copenhagen, Denmark; Seleno Therapeutics Pty. Ltd., Brighton East, VIC, 3187, Australia
| | - William B Domingues
- Laboratório de Genômica Estrutural, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, CEP 96010-900, RS, Brazil
| | - Vinicius F Campos
- Laboratório de Genômica Estrutural, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, CEP 96010-900, RS, Brazil
| | - Mauro P Soares
- Laboratório Regional de Diagnóstico Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas, CEP 96010-900, RS, Brazil
| | - Cristiane Luchese
- Programa de Pós-graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica (LaFarBio), Grupo de Pesquisa em Neurobiotecnologia (GPN), Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Pelotas, CEP 96010-900, RS, Brazil
| | - Carl H Schiesser
- Seleno Therapeutics Pty. Ltd., Brighton East, VIC, 3187, Australia.
| | - Ethel A Wilhelm
- Programa de Pós-graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica (LaFarBio), Grupo de Pesquisa em Neurobiotecnologia (GPN), Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Pelotas, CEP 96010-900, RS, Brazil.
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Labruto F, Song X, Valen G, Vaage J. Lazaroid U-83836E improves tolerance to hemorrhagic shock and limb ischemia and reperfusion in rats and increases cardiac heat shock protein 72. Acad Emerg Med 2006; 13:7-12. [PMID: 16365323 DOI: 10.1197/j.aem.2005.07.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
OBJECTIVES Aminosteroids of the lazaroid type protect organs from ischemia-reperfusion damage. The authors hypothesized that lazaroid U-83836E may be beneficial in a shock model with hemorrhage combined with limb ischemia. Furthermore, the authors hypothesized that lazaroids induce expression of heat shock proteins (HSPs) of the 72-kDa family. METHODS Rats were divided into two groups (lazaroid and control groups, n = 8 each) and pretreated with the lazaroid U-83836E (5 mg/kg) or with vehicle intraperitoneally at 12 and 24 hours before experiments. At the time of the experiment, rats were anesthetized, and the femoral artery of each rat was cannulated. After 20 minutes of stabilization, blood was shed from each rat to bring its mean arterial pressure to 24-28 mmHg for 2 hours. Bilateral tourniquets were tightened proximally on the rat thighs during those 2 hours and then released. Shed blood plus equal amounts of Ringer acetate then were infused to restore normal blood pressure, followed by a continuous infusion of Ringer acetate, the rate of which was regulated to maintain blood pressure, until 30 minutes after start of resuscitation. Fluid resuscitation was stopped, and rats were observed for another 3.5 hours. At the end of the observation period, the rats' hearts were collected for immunoblot analysis of HSP72. Additional hearts were collected from similarly pretreated rats not undergoing the episode of hemorrhagic shock and fluid resuscitation. RESULTS Pretreatment with U-83836E improved mean arterial blood pressure after hemorrhagic shock and fluid resuscitation (p = 0.02), combined with improvements in acid-base balance (improved base excess and standard bicarbonate; p = 0.02 and p = 0.01, respectively). Western blot of cardiac protein extracts demonstrated that lazaroid pretreatment increased expression of HSP72. CONCLUSIONS Pretreatment with the lazaroid U-83836E improved outcome markers in this hemorrhagic shock model. The observed protection may be caused by increased expression of HSP72.
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Affiliation(s)
- Fausto Labruto
- Crafoord Laboratory for Experimental Surgery, Karolinska Institutet, Stockholm, Sweden.
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Visvanathan K, Charles A, Bannan J, Pugach P, Kashfi K, Zabriskie JB. Inhibition of bacterial superantigens by peptides and antibodies. Infect Immun 2001; 69:875-84. [PMID: 11159981 PMCID: PMC97965 DOI: 10.1128/iai.69.2.875-884.2001] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The pyrogenic exotoxins of group A streptococci and staphylococcal enterotoxins are a family of structurally related superantigens with similar biological activity. Two distinct areas have been identified which have a highly conserved amino acid homology in all of the toxin families. A number of peptides were constructed from these regions, some of which were concatenated and polymerized to enhance their immunogenicity in animals. Antibodies prepared against these polymerized peptides were used to serologically identify the majority of the superantigen toxins, block the biological activities of the superantigens, and protect an experimental animal model against shock. In addition certain peptides were able per se to block up to 90% of the proliferative responses induced by the toxins. The peptide also proved protective in a septic shock model in mice. Binding experiments indicate that the peptide binds tightly to the major histocompatibility complex class II molecule, thus preventing binding and hence activation of the superantigen. The selective and rapid binding of the peptide to the major histocompatibility complex class II molecule may lead to a novel therapeutic modality in treatment of superantigen-mediated diseases.
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Affiliation(s)
- K Visvanathan
- Laboratory of Clinical Microbiology and Immunology, Rockefeller University, New York, New York 10021, USA
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