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Barbosa LM, Oliveira LMLD, Queiroz CPV, Freitas BAS, Lima TMPD, Aguiar JLDA, Medeiros Júnior MD, Perez DEDC, Godoy GP. The effect of biopolymer gel derived from sugarcane on healing of traumatic oral ulcers: an experimental study. Acta Cir Bras 2024; 39:e390724. [PMID: 38477784 DOI: 10.1590/acb390724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Accepted: 11/28/2023] [Indexed: 03/14/2024] Open
Abstract
PURPOSE The extracellular polysaccharide (EPS) is produced by the bacterium Zoogloea sp. and plays a positive role in tissue repair. The purpose of this study was to clinically and histologically compare the effects of EPS in the healing of traumatic oral ulcers in rats with the effects of triamcinolone. METHODS Ulcers were induced in the oral mucous of 45 male Wistar rats, divided into three groups: control group, treated with triamcinolone, and treated with biopolymer gel. In the clinical evaluation, we considered the weight variation of the animals and the size of the lesion area, at baseline and on treatment days 1, 3 and 7. The histological parameters evaluated were the type and intensity of the inflammatory infiltration, the presence of necrosis and foreign body granuloma and the degree of re-epithelialization of the lesion. RESULTS The reduction of the lesion area was greater in the animals treated with EPS, with no difference in the intensity of the inflammatory infiltration between the groups on days 3 and 7 of treatment. CONCLUSIONS The results suggest that topical application of EPS in traumatic oral ulcers of rats promotes faster repair than triamcinolone ointment, without increasing the intensity of inflammatory infiltration under the lesion.
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Singh AP, Singh S, Malik R. A Post-marketing Surveillance, Single-Centric Study to Evaluate the Safety and Tolerability of VELNEZ as a Space-Occupying Dressing Pack After Ear Surgery. Cureus 2024; 16:e51732. [PMID: 38318579 PMCID: PMC10839627 DOI: 10.7759/cureus.51732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/06/2024] [Indexed: 02/07/2024] Open
Abstract
PURPOSE The purpose of this study was to evaluate the safety and tolerability of VELNEZ (Datt Mediproducts Pvt. Ltd., New Delhi, India) as a space-occupying dressing for controlling hemorrhage after ear surgery. METHOD A total of 21 patients were included in an open-label, interventional, single-arm post-marketing surveillance study to investigate the safety and efficacy of the VELNEZ ear pack. The patients were questioned for collecting data related to the subject's safety and comfort, adverse events, site assessment, and otoscopic examination from discharge day to last follow-up (eight follow-up visits) at regular intervals. The standardized questionnaires for VELNEZ tolerability (pain/pressure effect, infection, and general satisfaction) were used after ear surgery. RESULTS The average hemorrhage control time was 1.08 ± 0.16 minutes. None of the subjects reported moderate pain at any of the study visits following surgery. This biodegradable ear pack had an average disintegration time of 25.4 days in the ear cavity. No postoperative adverse events or serious adverse events were observed. CONCLUSION VELNEZ is safe and effective as a space-occupying dressing pack after ear surgery and is well-tolerated by patients.
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Affiliation(s)
- Akhil P Singh
- Department of Otolaryngology - Head and Neck Surgery, Sarojini Naidu Medical College, Agra, IND
| | - Saloni Singh
- Department of Otolaryngology - Head and Neck Surgery, Sarojini Naidu Medical College, Agra, IND
| | - Ridhima Malik
- Department of Otolaryngology - Head and Neck Surgery, Sarojini Naidu Medical College, Agra, IND
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Lou Z. Comparison of biodegradable synthetic polyurethane foam versus Gelfoam packing in cartilage graft myringoplasty procedures. Auris Nasus Larynx 2020; 47:976-981. [DOI: 10.1016/j.anl.2020.06.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 05/24/2020] [Accepted: 06/08/2020] [Indexed: 12/28/2022]
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Alvi SA, Nelson-Brantley J, Staecker H. Alginate Ototoxicity in the Mouse Model. Otolaryngol Head Neck Surg 2018; 159:733-738. [PMID: 29759021 DOI: 10.1177/0194599818775951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective To determine whether alginate exposure to the round window of the mouse causes any measurable ototoxicity. Study Design Prospective animal study. Setting Basic science laboratory affiliated with a tertiary care university medical center. Subjects and Methods After Institutional Animal Care and Use Committee approval, 5 adult mice were obtained and underwent bullostomy and round window niche application of alginate. Auditory brainstem response (ABR) tests were completed at baseline prior to the procedure and also 5, 14, and 30 days postprocedure. Results were compared. At termination of procedure, the mice were sacrificed with harvest of the cochleae, which were viewed under histologic section. Results There were no significant increases in ABR thresholds in any of the test animals at all test periods after alginate exposure compared to baseline. There were also no observable behavioral changes after the procedure to indicate vestibular dysfunction. Cochlear sectioning revealed no evidence of histologic damage. Conclusion Exposure of alginate to the round window does not cause any obvious ototoxicity in the mouse model. Further clinical trials will be needed to elucidate the effect of alginate in the human middle ear.
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Affiliation(s)
- Sameer A Alvi
- 1 Department of Otolaryngology, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Jennifer Nelson-Brantley
- 2 Auditory & Vestibular Neuroscience Lab, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Hinrich Staecker
- 1 Department of Otolaryngology, University of Kansas Medical Center, Kansas City, Kansas, USA.,2 Auditory & Vestibular Neuroscience Lab, University of Kansas Medical Center, Kansas City, Kansas, USA
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Bouassiba C, Mueller RS. [In vivo-efficacy of an ear medication using gelatin powder as a vehicle for the therapy of canine otitis externa]. TIERARZTLICHE PRAXIS. AUSGABE K, KLEINTIERE/HEIMTIERE 2017; 45:235-244. [PMID: 28594048 DOI: 10.15654/tpk-160234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 02/04/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVE Otitis externa is normally treated with daily topical medication. Longer application intervals may be useful to facilitate therapy. In this study, the in vivo efficacy of a gel preparation containing marbofloxacin, dexamethasone and enilconazole was compared to that of a commercial otologic agent containing marbofloxacin, dexamethasone and clotrimazole based on clinical signs, ear cytology and bacterial/fungal cultures. MATERIAL AND METHODS A gel preparation (group A) or a registered otologic agent (group B), respectively, was applied to 41 dogs. A total of 50 ears (25 per group) were analysed. The gel preparation was administered on days 0 and 5; the combination preparation was administered daily according to the manufacturer's recommendations. Dogs were reevaluated clinically and cytologically after 5 and 10 days. Initially and after 10 days, ear swabs were taken for bacterial and fungal cultures. RESULTS No significant clinical or cytological differences were found between the groups. Significantly more isolates resistant to marbofloxacin were identified in group A after 10 days, although >98% of marbofloxacin was still detectable in vitro after 15 days. CONCLUSION The clinical and cytological efficacy of a gel containing defined active agents applied twice 5 days apart was comparable to that of an authorised otologic agent applied once daily. There appears to be an increased risk with the gel in that a resistance to fluoroquinolones develops. Local adverse effects are also possible. CLINICAL RELEVANCE A gelatine preparation containing active agents may be an alternative to daily topical therapy of canine otitis externa. The development of resistances is possible.
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Affiliation(s)
- Cosima Bouassiba
- Tierärztliche Praxis Dr. Cosima Bouassiba, Birgen 10, 41366 Schwalmtal, E-Mail:
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Hou Y, Xia Y, Pan Y, Tang S, Sun X, Xie Y, Guo H, Wei J. Influences of mesoporous zinc-calcium silicate on water absorption, degradability, antibacterial efficacy, hemostatic performances and cell viability to microporous starch based hemostat. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:340-349. [PMID: 28482536 DOI: 10.1016/j.msec.2017.03.094] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Revised: 03/04/2017] [Accepted: 03/12/2017] [Indexed: 11/28/2022]
Abstract
Efficacious hemostatic agents have significant potential application in visceral organ or large vessel arterial injure. In this study, mesoporous zinc-calcium silicate (m-ZCS) was synthesized, and microporous starch (MS) based hemostatic agents of m-ZCS/MS composites for hemorrhage control was fabricated. The results showed that the incorporation of m-ZCS into MS significantly enhanced the water absorption and degradability of the composites, which were dependent on the m-ZCS content. Moreover, the composites with antibacterial property could inhibit the growth of Escherichia coli (E. coli) and the antibacterial ratios increased with the m-ZCS content. The in vitro coagulation evaluation by using activated partial thromboplastin time (APTT) and prothrombin time (PT) revealed that the composites significantly activated the intrinsic and extrinsic pathway of coagulation cascade. In addition, for the animal model of rabbits in ear vein, skin, arterial and liver injuries, the hemostatic time of the composites obviously reduced with the increase of m-ZSC content, in which the composite with 15wt% m-ZCS content (15mZSC) showed remarkable efficacy on bleeding control. The composites could promote the viability of L929 cells, indicating no cytotoxicity of the composites. The results suggested that the m-ZCS/MS composites with excellent hemostatic and antibacterial properties might be a candidate for controlling bleeding and infection.
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Affiliation(s)
- Yu Hou
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China
| | - Yan Xia
- Department of Emergency, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - Yongkang Pan
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China
| | - Songchao Tang
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaofei Sun
- Department of Orthopedics, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - Yang Xie
- Department of Orthopedics, Changhai Hospital, Second Military Medical University, Shanghai 200433, China.
| | - Han Guo
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Jie Wei
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China.
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Takeda H, Kurioka T, Kaitsuka T, Tomizawa K, Matsunobu T, Hakim F, Mizutari K, Miwa T, Yamada T, Ise M, Shiotani A, Yumoto E, Minoda R. Protein transduction therapy into cochleae via the round window niche in guinea pigs. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2016; 3:16055. [PMID: 27579336 PMCID: PMC4988354 DOI: 10.1038/mtm.2016.55] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 07/02/2016] [Accepted: 07/04/2016] [Indexed: 12/18/2022]
Abstract
Cell-penetrating peptides (CPPs) are short sequences of amino acids that facilitate the penetration of conjugated cargoes across mammalian cell membranes, and as such, they may provide a safe and effective method for drug delivery to the inner ear. Simple polyarginine peptides have been shown to induce significantly higher cell penetration rates among CPPs. Herein, we show that a peptide consisting of nine arginines ("9R") effectively delivered enhanced green fluorescent protein (EGFP) into guinea pig cochleae via the round window niche without causing any deterioration in auditory function. A second application, 24 hours after the first, prolonged the presence of EGFP. To assess the feasibility of protein transduction using 9R-CPPs via the round window, we used "X-linked inhibitor of apoptosis protein" (XIAP) bonded to a 9R peptide (XIAP-9R). XIAP-9R treatment prior to acoustic trauma significantly reduced putative hearing loss and the number of apoptotic hair cells loss in the cochleae. Thus, the topical application of molecules fused to 9R-CPPs may be a simple and promising strategy for treating inner ear diseases.
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Affiliation(s)
- Hiroki Takeda
- Department of Otolaryngology-Head and Neck Surgery, Kumamoto University , Kumamoto, Japan
| | - Takaomi Kurioka
- Department of Otolaryngology, National Defense Medical College , Tokorozawa, Japan
| | - Taku Kaitsuka
- Department of Molecular Physiology, Kumamoto University , Kumamoto, Japan
| | - Kazuhito Tomizawa
- Department of Molecular Physiology, Kumamoto University , Kumamoto, Japan
| | - Takeshi Matsunobu
- Department of Otolaryngology, National Defense Medical College , Tokorozawa, Japan
| | - Farzana Hakim
- Department of Molecular Physiology, Kumamoto University , Kumamoto, Japan
| | - Kunio Mizutari
- Department of Otolaryngology, National Defense Medical College , Tokorozawa, Japan
| | - Toru Miwa
- Department of Otolaryngology-Head and Neck Surgery, Kumamoto University , Kumamoto, Japan
| | - Takao Yamada
- Department of Otolaryngology-Head and Neck Surgery, Kumamoto University , Kumamoto, Japan
| | - Momoko Ise
- Department of Otolaryngology-Head and Neck Surgery, Kumamoto University , Kumamoto, Japan
| | - Akihiro Shiotani
- Department of Otolaryngology, National Defense Medical College , Tokorozawa, Japan
| | - Eiji Yumoto
- Department of Otolaryngology-Head and Neck Surgery, Kumamoto University , Kumamoto, Japan
| | - Ryosei Minoda
- Department of Otolaryngology-Head and Neck Surgery, Kumamoto University , Kumamoto, Japan
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