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He P, Wang D, Zheng R, Wang H, Fu L, Tang G, Shi Z, Wu Y, Yang G. An antibacterial biologic patch based on bacterial cellulose for repair of infected hernias. Carbohydr Polym 2024; 333:121942. [PMID: 38494213 DOI: 10.1016/j.carbpol.2024.121942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/08/2024] [Accepted: 02/09/2024] [Indexed: 03/19/2024]
Abstract
Infection-associated complications and repair failures and antibiotic resistance have emerged as a formidable challenge in hernia repair surgery. Consequently, the development of antibiotic-free antibacterial patches for hernia repair has become an exigent clinical necessity. Herein, a GBC/Gel/LL37 biological patch (biopatch) with exceptional antibacterial properties is fabricated by grafting 2-Methacryloyloxyethyl trimethylammonium chloride (METAC), a unique quaternary ammonium salt with vinyl, onto bacterial cellulose (GBC), followed by compounding with gelatin (Gel) and LL37. The GBC/Gel/LL37 biopatch exhibits stable swelling capacity, remarkable mechanical properties, flexibility, and favorable biocompatibility. The synergistic effect of METAC and LL37 confers upon the GBC/Gel/LL37 biopatch excellent antibacterial efficacy against Staphylococcus aureus and Escherichia coli, effectively eliminating invading bacteria without the aid of exogenous antibiotics in vivo while significantly reducing local acute inflammation caused by infection. Furthermore, the practical efficacy of the GBC/Gel/LL37 biopatch is evaluated in an infected ventral hernia model, revealing that the GBC/Gel/LL37 biopatch can prevent the formation of visceral adhesions, facilitate the repair of infected ventral hernia, and effectively mitigate chronic inflammation. The prepared antibacterial GBC/Gel/LL37 biopatch is very effective in dealing with the risk of infection in hernia repair surgery and offers potential clinical opportunities for other soft injuries, exhibiting considerable clinical application prospects.
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Affiliation(s)
- Pengyu He
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Dawei Wang
- Department of Plastic and Cosmetic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan 430030, Hubei, China
| | - Ruizhu Zheng
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hao Wang
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Lina Fu
- College of Medicine, Huanghuai University, Zhumadian, Henan 463000, China; Zhumadian Central Hospital, Zhumadian, Henan 463000, China
| | - Guoliang Tang
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Zhijun Shi
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Yiping Wu
- Department of Plastic and Cosmetic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan 430030, Hubei, China.
| | - Guang Yang
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
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Malani M, Thodikayil AT, Saha S, Nirmal J. Carboxylated nanofibrillated cellulose empowers moxifloxacin to overcome Staphylococcus aureus biofilm in bacterial keratitis. Carbohydr Polym 2024; 324:121558. [PMID: 37985120 DOI: 10.1016/j.carbpol.2023.121558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/21/2023] [Accepted: 11/02/2023] [Indexed: 11/22/2023]
Abstract
Bacterial keratitis is one of the vision-threatening ocular diseases that is increasing at an alarming rate due to antimicrobial resistance. One of the primary causes of antimicrobial resistance could be biofilm formation, which alters the mechanism and physiology of the microorganisms. Even a potent drug fails to inhibit biofilm due to the extracellular polysaccharide matrix surrounding the bacteria, inhibiting the permeation of drugs. Therefore, we aimed to develop carboxylated nanocellulose fibers loaded with moxifloxacin (Mox-cNFC) as a novel drug delivery system to treat bacterial corneal infection. Nanocellulose fibers were fabricated using a two-step method involving citric acid hydrolysis followed by TEMPO oxidation to introduce carboxylated groups (1.12 mmol/g). The Mox-cNFC particles showed controlled drug release till 40 h through diffusion. In vitro biofilm inhibition studies showed the particle's ability to disrupt the biofilm matrix and enhance the drug penetration to achieve optimal concentrations that inhibit the persister cells (without increasing minimum inhibitory concentration), thereby reducing the bacterial drug-resistant property. In vivo studies revealed the therapeutic potential of Mox-cNFC to treat Staphylococcus aureus-induced bacterial keratitis with once-a-day treatment, unlike neat moxifloxacin. Mox-cNFC could improve patient compliance by reducing the frequency of instillation and a controlled drug release to prevent toxicity.
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Affiliation(s)
- Manisha Malani
- Translational Pharmaceutics Research Laboratory, Department of Pharmacy, Birla Institute of Technology and Science-Pilani, Hyderabad Campus, Hyderabad 500078, Telangana, India
| | | | - Sampa Saha
- Department of Materials Science and Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India.
| | - Jayabalan Nirmal
- Translational Pharmaceutics Research Laboratory, Department of Pharmacy, Birla Institute of Technology and Science-Pilani, Hyderabad Campus, Hyderabad 500078, Telangana, India.
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von Ahnen T, von Ahnen M, Militz-Müller S, Süß A, Schardey J, Schopf S, Schardey HM, Wirth U. Efficacy of four different hemostatic agents in thyroid surgery in reducing the amount of post-operative fluid collection. BMC Surg 2023; 23:303. [PMID: 37794384 PMCID: PMC10552291 DOI: 10.1186/s12893-023-02172-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 08/25/2023] [Indexed: 10/06/2023] Open
Abstract
PURPOSES Postoperative bleeding remains a life-threatening complication in thyroid surgery. The aim was to assess the efficacy of four different hemostatic agents, Collagen-Fibrinogen-Thrombin Patch (CFTP) in two sizes (3 × 2.5 cm and 9.5 × 4.8 cm), polysaccharide particles (1 g) and Cellulose Gauze (2.5 × 5 cm) on postoperative drainage volume (DV) compared to a control group. METHODS We included from October 2007 until Mai 2011, 150 patients (30 per group) for this monocentric, retrospective case-controlled study. Patients were scheduled for a hemithyroidectomy or thyroidectomy. The primary endpoint was the postoperative DV within the first 24 h, secondary the incidence of adverse events. RESULTS There were no difference in demographic parameters. The mean DV (± SD) was 51.15 (± 36.86) ml in the control, 50.65 (± 42.79) ml in small (3 × 2.5 cm), 25.38 (± 23.99) ml in large CFTP (9.5 × 4.8 cm), 53.11 (± 39.48) ml in the polysaccharide particles and 48.94 (± 30.59) ml in the cellulose gauze group. DV was significantly reduced with the large CFTP (p < 0.05) compared to all other groups. There were no adverse events. CONCLUSIONS We were able to demonstrate a significant reduction in the DV for the large CFTP group compared to the other collectives. Although this as being associated with not inconsiderable costs and we would only recommend its use for high-risk patients only.
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Affiliation(s)
| | | | | | - Anna Süß
- Krankenhaus Agatharied GmbH, Hausham, Germany
| | | | | | | | - Ulrich Wirth
- Ludwig-Maximilians-Universität München, München, Germany
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Fratini C, Weaver E, Moroni S, Irwin R, Dallal Bashi YH, Uddin S, Casettari L, Wylie MP, Lamprou DA. Combining microfluidics and coaxial 3D-bioprinting for the manufacturing of diabetic wound healing dressings. Biomater Adv 2023; 153:213557. [PMID: 37441958 DOI: 10.1016/j.bioadv.2023.213557] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/21/2023] [Accepted: 07/07/2023] [Indexed: 07/15/2023]
Abstract
Diabetic foot ulcers (DFUs) are a crucial complication of diabetes, as in a diabetic wound, each step of the physiological healing process is affected. This entails a more easily infectable wound, and delayed tissue regeneration due to the inflammation that occurs, leading to a drastic decrease in the overall patient's quality of life. As a strategy to manage DFUs, skin alternatives and wound dressings are currently receiving a lot of attention as they keep the wound environment "under control", while providing bioactive compounds that help to manage infection and inflammation and promote tissue repair. This has been made possible thanks to the advent of emerging technologies such as 3D Bioprinting to produce skin resembling constructs or microfluidics (MFs) that allows the manufacture of nanoparticles (NPs) that act as drug carriers, in a prompt and less expensive way. In the present proof-of-concept study, the possibility of combining two novel and appealing techniques in the manufacturing of wound dressings has been demonstrated for first time. The novelty of this work consists in the combination of liposomes (LPs) encapsulating the active pharmaceutical ingredient (API) into a hydrogel that is further printed into a three-dimensional scaffold for wound dressing; to the knowledge of the authors this has never been done before. A grid-shaped scaffold has been produced through the coaxial 3D bioprinting technique which has allowed to combine, in one single filament, two different bioinks. The inner core of the filament is a nanocomposite hydrogel consisting of hydroxyethyl cellulose (HEC) and PEGylated LPs encapsulated with thyme oil (TO) manufactured via MFs for the first time. The outer shell of the filament, instead, is represented by a hybrid hydrogel composed of sodium alginate/cellulose nanocrystals (SA/CNC) and enriched with free TO. This provides a combination of two different release ratios of the API, a bulk release for the first 24 h thanks to the free TO in the shell of the filament and a sustained release for up to 10 days provided from the API inside the LPs. Confocal Microscopy verified the actual presence of the LPs inside the scaffold after printing and evaluation using the zone of inhibition test proved the antibacterial activity of the manufactured scaffolds against both Gram-positive and Gram-negative bacteria.
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Affiliation(s)
- Costanza Fratini
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, United Kingdom; Department of Biomolecular Sciences, University of Urbino Carlo Bo, 61029 Urbino, Italy
| | - Edward Weaver
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, United Kingdom
| | - Sofia Moroni
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, United Kingdom; Department of Biomolecular Sciences, University of Urbino Carlo Bo, 61029 Urbino, Italy
| | - Robyn Irwin
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, United Kingdom
| | - Yahya H Dallal Bashi
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, United Kingdom
| | - Shahid Uddin
- Immunocore Ltd., 92 Park Dr, Milton Park, Abingdon OX14 4RY, United Kingdom
| | - Luca Casettari
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, 61029 Urbino, Italy
| | - Matthew P Wylie
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, United Kingdom
| | - Dimitrios A Lamprou
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, United Kingdom.
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Abstract
Constipation can seriously affect the quality of life and increase the risk of colorectal cancer. The present strategies for constipation therapy have adverse effects, such as causing irreversible intestinal damage and affecting the absorption of nutrients. Nanocrystalline cellulose (NCC), which is from natural plants, has good biocompatibility and high safety. Herein, we used NCC to treat constipation assessed by the black stool, intestinal tissue sections, and serum biomarkers. We studied the effect of NCC on gut microbiota and discussed the correlation of gut microbiota and metabolites. We evaluated the long-term biosafety of NCC. NCC could effectively treat constipation through gut microbiota metabolism, which required a small dosage and did not affect the organs and intestines. NCC could be used as an alternative to medications and dietary fiber for constipation therapy.
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Affiliation(s)
- Mingzheng Wang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, People's Republic of China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for NanoScience and Technology, Beijing 100190, People's Republic of China
| | - Ruitao Cha
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for NanoScience and Technology, Beijing 100190, People's Republic of China
| | - Wenshuai Hao
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, People's Republic of China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for NanoScience and Technology, Beijing 100190, People's Republic of China
| | - Ran Du
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Shenzhen Key Laboratory of Agricultural Synthetic Biology, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, Guangdong 518124, People's Republic of China
| | - Pai Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, People's Republic of China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for NanoScience and Technology, Beijing 100190, People's Republic of China
| | - Yingmo Hu
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, People's Republic of China
| | - Xingyu Jiang
- Guangdong Provincial Key Laboratory of Advanced Biomaterials, Shenzhen Key Laboratory of Smart Healthcare Engineering, Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, People's Republic of China
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Karlsson M, Elmasry M, Steinvall I, Huss F, Olofsson P, Elawa S, Larsson A, Sjöberg F. Biosynthetic cellulose compared to porcine xenograft in the treatment of partial-thickness burns: A randomised clinical trial. Burns 2022; 48:1236-1245. [PMID: 34629186 DOI: 10.1016/j.burns.2021.09.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 09/13/2021] [Accepted: 09/15/2021] [Indexed: 12/15/2022]
Abstract
AIM The aim was to compare two dressing treatments for partial-thickness burns: biosynthetic cellulose dressing (BsC) (Epiprotect® S2Medical AB, Linköping, Sweden) and porcine xenograft (EZ Derm®, Mölnlycke Health Care, Gothenburg, Sweden). METHODS Twenty-four adults with partial-thickness burns were included in this randomized clinical trial conducted at The Burn Centers in Linköping and Uppsala, Sweden between June 2016 and November 2018. Time to healing was the primary outcome. Secondary outcomes were wound infection, pain, impact on everyday life, length of hospital stay, cost, and burn scar outcome (evaluated with POSAS). RESULTS We found no significant differences between the two dressing groups regarding time to healing, wound infection, pain, impact on everyday life, duration of hospital stay, cost, or burn scar outcome at the first follow up. Burn scar outcome at the 12-month follow up showed that the porcine xenograft group patients scored their scars higher on the POSAS items thickness (p = 0.048) and relief (p = 0.050). This difference was, however, not confirmed by the observer. CONCLUSIONS The results showed the dressings performed similarly when used in adults with burns evaluated as partial thickness.
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Affiliation(s)
- Matilda Karlsson
- Department of Hand Surgery, Plastic Surgery and Burns, Linköping University, Linköping, Sweden; Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.
| | - Moustafa Elmasry
- Department of Hand Surgery, Plastic Surgery and Burns, Linköping University, Linköping, Sweden; Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Ingrid Steinvall
- Department of Hand Surgery, Plastic Surgery and Burns, Linköping University, Linköping, Sweden; Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Fredrik Huss
- Department of Surgical Sciences, Plastic Surgery, Uppsala University, Uppsala, Sweden; Burn Center, Department of Plastic and Maxillofacial Surgery, Uppsala University Hospital, Uppsala, Sweden
| | - Pia Olofsson
- Department of Hand Surgery, Plastic Surgery and Burns, Linköping University, Linköping, Sweden; Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Sherif Elawa
- Department of Hand Surgery, Plastic Surgery and Burns, Linköping University, Linköping, Sweden; Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Alexander Larsson
- Department of Hand Surgery, Plastic Surgery and Burns, Linköping University, Linköping, Sweden; Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Folke Sjöberg
- Department of Hand Surgery, Plastic Surgery and Burns, Linköping University, Linköping, Sweden; Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden; Department of Anesthesiology and Intensive Care, Linköping University, Linköping, Sweden
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Qi Z, Pei P, Zhang Y, Chen H, Yang S, Liu T, Zhang Y, Yang K. 131I-αPD-L1 immobilized by bacterial cellulose for enhanced radio-immunotherapy of cancer. J Control Release 2022; 346:240-249. [PMID: 35469982 DOI: 10.1016/j.jconrel.2022.04.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 03/26/2022] [Accepted: 04/17/2022] [Indexed: 11/19/2022]
Abstract
Radioisotope therapy (RIT) of cancer is restrained by the nonspecific distribution of radioisotope and ineptitude for metastatic tumors. Meanwhile, the clinical application of immune checkpoint blockade (ICB) confronts problems such as low responsive rate, multiple administration requirements and immune-related adverse events (irAE). To address these challenges, we prepared an injectable suspension by immobilizing 131I-labeled anti-programmed cell death-ligand 1 antibody (αPD-L1) in bacterial cellulose for precise and durable radio-immunotherapy of cancer. The crisscross network structure of bacterial cellulose nanofibers would contribute to the long-term retention of 131I-labeled αPD-L1 within tumors, which could reduce the side effect stemmed from the nonspecific 131I distribution in normal tissues. The potent long-term RIT of 131I, combined with ICB by αPD-L1, could effectively restrain the growth of primary tumor in mice. In addition to the direct killing effect, 131I-αPD-L1 immobilized by bacterial cellulose could enhance the immunogenic cell death (ICD) of cancer cells, activating the maturation of multiple immune cells to induce a systemic anti-tumor immune effect. Our therapeutic strategy could suppress spontaneous cancer metastasis and prolong the survival time of tumor-bearing mice. This study proposed a new approach for combined radio-immunotherapy and a novel solution for tumor metastasis in advanced-stage cancers.
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Affiliation(s)
- Zhongyuan Qi
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, Jiangsu 215123, China
| | - Pei Pei
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, Jiangsu 215123, China
| | - Yanxiang Zhang
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, Jiangsu 215123, China
| | - Hua Chen
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, Jiangsu 215123, China
| | - Sai Yang
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, Jiangsu 215123, China
| | - Teng Liu
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, Jiangsu 215123, China.
| | - Yujuan Zhang
- Experimental Center of Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, China.
| | - Kai Yang
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, Jiangsu 215123, China.
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Menegasso JF, Moraes NAC, Vásquez TP, Felipetti FA, Antonio RV, Dutra RC. Modified montmorillonite-bacterial cellulose composites as a novel dressing system for pressure injury. Int J Biol Macromol 2022; 194:402-411. [PMID: 34818530 DOI: 10.1016/j.ijbiomac.2021.11.082] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 11/11/2021] [Accepted: 11/13/2021] [Indexed: 02/03/2023]
Abstract
The main objective of this study was to investigate the effects of bacterial cellulose hydrogel (BCH) incorporated into montmorillonite (MMT) and its underlying mechanisms of action on a skin wound healing mouse model following pressure injury model. Komagataeibacter hansenii was used to obtain 5 cm in diameter and 0.8 mm of thickness circular bacterial cellulose (BC) sheets, which were incorporated with MMT by deposition ex-site using a 0.1% MMT suspension (100 rpm for 24 h at 28 °C). Afterward, Fourier Transform Infrared Spectroscopy (FT-IR) and Scanning Electron Microscopy (SEM) were used to characterize the bacterial cellulose hydrogel incorporated into montmorillonite (BCH-MMT). The pressure injury model was assessed by macroscopic and histological analysis in male Swiss mice. Both, BC and BCH-MMT, showed a typical FTIR spectrum of cellulosic substrates with pronounces bands around 3344, 2920, 1637, and 1041 cm-1 while microparticles of MMT dispersed uniformly throughout BC were revealed by SEM photographs. Animals treated with BCH-MMT showed significant healing of pressure ulcers as demonstrated by reduced area of redness and spontaneous hyperalgesia, lower amounts of in-site inflammatory cells (to the same level as the positive control Dersani®) and ultimately, complete epidermis re-epithelialization and tissue regeneration. Altogether, these findings suggest that a modified BCH-MMT film could serve as scaffolding for skin tissue engineering and potentially as a novel dressing material for pressure injury.
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Affiliation(s)
- Jaíne Ferrareis Menegasso
- Laboratory of Autoimmunity and Immunopharmacology, Department of Health Sciences, Campus Araranguá, Universidade Federal de Santa Catarina, 88906-072 Araranguá, SC, Brazil
| | - Nayara Alves Celinca Moraes
- Laboratory of Autoimmunity and Immunopharmacology, Department of Health Sciences, Campus Araranguá, Universidade Federal de Santa Catarina, 88906-072 Araranguá, SC, Brazil
| | - Tatiana Pineda Vásquez
- Laboratory of Biochemistry and Microbiology Applied to Biotechnological Processes, Campus Araranguá, Universidade Federal de Santa Catarina, 88906-072 Araranguá, SC, Brazil
| | - Francielly Andressa Felipetti
- Laboratory of Autoimmunity and Immunopharmacology, Department of Health Sciences, Campus Araranguá, Universidade Federal de Santa Catarina, 88906-072 Araranguá, SC, Brazil
| | - Regina Vasconcellos Antonio
- Laboratory of Biochemistry and Microbiology Applied to Biotechnological Processes, Campus Araranguá, Universidade Federal de Santa Catarina, 88906-072 Araranguá, SC, Brazil
| | - Rafael Cypriano Dutra
- Laboratory of Autoimmunity and Immunopharmacology, Department of Health Sciences, Campus Araranguá, Universidade Federal de Santa Catarina, 88906-072 Araranguá, SC, Brazil; Post-Graduate Program of Neuroscience, Center of Biological Sciences, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil.
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He W, Wu J, Xu J, Mosselhy DA, Zheng Y, Yang S. Bacterial Cellulose: Functional Modification and Wound Healing Applications. Adv Wound Care (New Rochelle) 2021; 10:623-640. [PMID: 32870775 PMCID: PMC8392072 DOI: 10.1089/wound.2020.1219] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 08/26/2020] [Indexed: 12/17/2022] Open
Abstract
Significance: Wound dressings are frequently used for wound covering and healing. Ideal wound dressings should provide a moist environment for wounds and actively promote wound healing and skin recovery. The materials used as ideal wound dressings should possess specific properties, thus accelerating skin tissue regeneration process. Recent Advances: Bacterial cellulose (BC) is a natural polymer synthesized by some bacteria. As a kind of natural biopolymer, BC shows good biological activity, biodegradability, and biological adaptability. It has many unique physical, chemical, and biological properties, such as ultrafine nanofiber network, high crystallinity, high water absorption and retention capacity, and high tensile strength and elastic modulus. These excellent properties of BC have laid the foundation for its application as dressing in wound healing. Critical Issues: To optimize the biocompatibility and antimicrobial activity of BC, different methods including microbial fermentation, physical modification, chemical modification, and compound modification have been adopted to modify BC to ensure a better application in wound healing. BC-based wound dressings have been applied in infected wounds, acute traumatic injuries, burns, and diabetic wounds, showing remarkable therapeutic effects on promoting wound healing. Furthermore, there have been some commercial BC-based dressings and they have been utilized in clinical practice. Future Directions: Because of its excellent physicochemical characteristics and biological properties, BC shows high clinical value to be used as a wound dressing for skin tissue regeneration.
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Affiliation(s)
- Wei He
- School of Materials Science and Engineering, University of Science and Technology, Beijing, China
- Suzhou Xiangcheng Medical Materials Science and Technology Co., Ltd., Suzhou, China
| | - Jian Wu
- Suzhou Xiangcheng Medical Materials Science and Technology Co., Ltd., Suzhou, China
- Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, China
- Division of Nanomaterials, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Nanchang, China
| | - Jin Xu
- Department of Basic Medicine, Kangda College of Nanjing Medical University, Lianyungang, China
| | - Dina A. Mosselhy
- Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, Espoo, Finland
| | - Yudong Zheng
- School of Materials Science and Engineering, University of Science and Technology, Beijing, China
| | - Siming Yang
- Key Laboratory of Wound Repair and Regeneration of PLA, Chinese PLA General Hospital, Medical College of PLA, Beijing, China
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Luo H, Lan H, Cha R, Yu X, Gao P, Zhang P, Zhang C, Han L, Jiang X. Dialdehyde Nanocrystalline Cellulose as Antibiotic Substitutes against Multidrug-Resistant Bacteria. ACS Appl Mater Interfaces 2021; 13:33802-33811. [PMID: 34282616 DOI: 10.1021/acsami.1c06308] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Antibiotic abuse resulted in the emergence of multidrug-resistant Gram-positive pathogens, which pose a severe threat to public health. It is urgent to develop antibiotic substitutes to kill multidrug-resistant Gram-positive pathogens effectively. Herein, the antibacterial dialdehyde nanocrystalline cellulose (DNC) was prepared and characterized. The antibacterial activity and biosafety of DNC were studied. With the increasing content of aldehyde groups, DNC exhibited high antibacterial activity against Gram-positive pathogens in vitro. DNC3 significantly reduced the amounts of methicillin-resistant Staphylococcus aureus (MRSA) on the skin of infected mice models, which showed low cytotoxicity, excellent skin compatibility, and no acute oral toxicity. DNC exhibited potentials as antibiotic substitutes to fight against multidrug-resistant bacteria, such as ingredients in salves to treat skin infection and other on-skin applications.
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Affiliation(s)
- Huize Luo
- CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, No. 11 Zhongguancun Beiyitiao, Beijing 100190, P. R. China
| | - Hai Lan
- Beijing Nano-Ace Technology Co., Ltd., Beijing 102299, P. R. China
| | - Ruitao Cha
- CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, No. 11 Zhongguancun Beiyitiao, Beijing 100190, P. R. China
| | - Xinning Yu
- The Engineering Research Center of 3D Printing and Bio-fabrication, Beijing Institute of Graphic Communication, Beijing 102600, P. R. China
| | - Pangye Gao
- CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, No. 11 Zhongguancun Beiyitiao, Beijing 100190, P. R. China
| | - Pai Zhang
- CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, No. 11 Zhongguancun Beiyitiao, Beijing 100190, P. R. China
| | - Chunliang Zhang
- CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, No. 11 Zhongguancun Beiyitiao, Beijing 100190, P. R. China
| | - Lu Han
- The Engineering Research Center of 3D Printing and Bio-fabrication, Beijing Institute of Graphic Communication, Beijing 102600, P. R. China
| | - Xingyu Jiang
- Department of Biomedical Engineering, Southern University of Science and Technology, No. 1088 Xueyuan Road, Nanshan District, Shenzhen, Guangdong 518055, P. R. China
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Oliveira MH, Pinto FCM, Ferraz-Carvalho RS, Albuquerque AV, Aguiar JL. BIO-NAIL: a bacterial cellulose dressing as a new alternative to preserve the nail bed after avulsion. J Mater Sci Mater Med 2020; 31:121. [PMID: 33247774 DOI: 10.1007/s10856-020-06456-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 10/27/2020] [Indexed: 06/12/2023]
Abstract
Avulsion of the nail plate is the most accomplished surgical procedure among the nail apparatus surgeries. Since it is not possible to use the removed nail to cover the nail bed, some materials have been suggested, however, they are generally not available for use and often at a high cost. To evaluate the use of Bacterial Cellulose (BC) dressing as a biological nail (Bio-Nail) after partial or total avulsion of the nail plate. Twenty-six candidates for nail avulsion, were randomized into two groups: Control, using Vaseline with gauze (11 patients) and Experimental group, BC group, using the Bio-Nail (15 patients). The patients were followed up during the 180-day period. The distribution of the patients in the groups was homogeneous for both sociodemographic and clinical data. The occurrence of infection (1 case in the control group) was not statistically relevant. The BC group had lower pain intensity (p = 0.011) with earlier temporal resolution when compared to the control group (p = 0.003). The BC group presented earlier reepithelization (p = 0.022) and better quantitative (p = 0.021) and qualitative conditions (p = 0.011) for the exudate. Regarding satisfaction, all the patients were satisfied. Good preservation of the nail plate area was observed in the BC group at the end of the 180-day period (p = 0.024). Average time of BC dressing permanence was 16.4 ± 7.1 days. BC showed to be appropriate as a dressing after partial or total avulsion of the nail plate. BC is a Bio-Nail promising for nail bed healing.
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Affiliation(s)
- M H Oliveira
- Department of Dermatology, Hospital das Clínicas, Department of Surgery, Health Sciences Center, Federal University of Pernambuco, UFPE, Pernambuco, Brazil
| | - F C M Pinto
- Post-Graduation Program in Surgery, Department of Surgery, Health Sciences Center, Federal University of Pernambuco, UFPE, Pernambuco, Brazil.
| | - R S Ferraz-Carvalho
- Post-Graduation Program in Surgery, Department of Surgery, Health Sciences Center, Federal University of Pernambuco, UFPE, Pernambuco, Brazil
| | - A V Albuquerque
- Post-Graduation Program in Surgery, Department of Surgery, Health Sciences Center, Federal University of Pernambuco, UFPE, Pernambuco, Brazil
| | - J L Aguiar
- Post-Graduation Program in Surgery, Department of Surgery, Health Sciences Center, Federal University of Pernambuco, UFPE, Pernambuco, Brazil
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Abstract
The preparation of microcapsules composed by natural materials have received great attention, as they represent promising systems for the fabrication of micro-containers for controlled loading and release of active compounds, and for other applications. Using polysaccharides as the main materials is receiving increasing interest, as they constitute the main components of the plant cell wall, which represent an ideal platform to mimic for creating biocompatible systems with specific responsive properties. Several researchers have recently described methods for the preparation of microcapsules with various sizes and properties using cell wall polysaccharide nanomaterials. Researchers have focused mostly in using cellulose nanomaterials as structural components in a bio-mimetic approach, as cellulose constitutes the main structural component of the plant cell wall. In this review, we describe the microcapsules systems presented in the literature, focusing on the works where polysaccharide nanomaterials were used as the main structural components. We present the methods and the principles behind the preparation of these systems, and the interactions involved in stabilizing the structures. We show the specific and stimuli-responsive properties of the reported microcapsules, and we describe how these characteristics can be exploited for specific applications.
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Binnetoglu A, Demir B, Akakin D, Kervancioglu Demirci E, Batman C. Bacterial cellulose tubes as a nerve conduit for repairing complete facial nerve transection in a rat model. Eur Arch Otorhinolaryngol 2019; 277:277-283. [PMID: 31595316 DOI: 10.1007/s00405-019-05637-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 09/05/2019] [Indexed: 12/21/2022]
Abstract
PURPOSE Functionality of the facial nerve is cosmetically important. While many techniques have been investigated, early and effective treatment for traumatic facial nerve paralysis remains challenging. Here, we aim to examine bacterial cellulose (BC) as a new tubularization material for improving facial nerve regeneration. METHODS Our study was performed on 40 female Sprague Dawley rats. Rats were randomly divided into four groups, with 10 rats per group. In all rats, the main trunk of the facial nerve was completely cut 8 mm before the branching point. For repairing the facial nerve, in group 1, the nerve was left to recover spontaneously (control group); in group 2, it was repaired by primary suturing (8.0 Ethilon sutures, Ethicon); in group 3, BC tubes alone were used to aid nerve repair; and in group 4, both BC tubes and primary sutures (8.0 Ethilon sutures) were used. After 10 weeks, the facial nerve regeneration was evaluated by the whisker movement test and electrophysiologically (nerve stimulation threshold and compound muscle action potential). Nerve regeneration was assessed by calculating the number of myelinated nerve fibers, and by microscopically evaluating the amount of regeneration and fibrosis. RESULTS No significant difference was observed among the groups in terms of whisker movement and electrophysiological parameters (P > 0.05). We found that the numbers of regenerating myelinated fibers were significantly increased (P < 0.05) when BC tubes were used as a nerve conduit. CONCLUSIONS BC can be easily shaped into a hollow tube that guides nerve axons, resulting in better nerve regeneration after transection.
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Affiliation(s)
- Adem Binnetoglu
- Department of Otorhinolaryngology-Head and Neck Surgery, St. Elizabeth's Medical Center, Tufts University School of Medicine, Boston, MA, 02135, USA.
| | - Berat Demir
- Department of Otorhinolaryngology-Head and Neck Surgery, Pendik Training and Research Hospital, Marmara University Medical Faculty, Istanbul, Turkey
| | - Dilek Akakin
- Department of Histology and Embryology, Marmara University Medical Faculty, Istanbul, Turkey
| | - Elif Kervancioglu Demirci
- Department of Histology and Embryology, Istanbul University Istanbul Medical Faculty, Istanbul, Turkey
| | - Caglar Batman
- Department of Otorhinolaryngology-Head and Neck Surgery, Pendik Training and Research Hospital, Marmara University Medical Faculty, Istanbul, Turkey
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Autier L, Clavreul A, Cacicedo ML, Franconi F, Sindji L, Rousseau A, Perrot R, Montero-Menei CN, Castro GR, Menei P. A new glioblastoma cell trap for implantation after surgical resection. Acta Biomater 2019; 84:268-279. [PMID: 30465922 DOI: 10.1016/j.actbio.2018.11.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 11/09/2018] [Accepted: 11/18/2018] [Indexed: 12/11/2022]
Abstract
Glioblastoma (GB) is a highly infiltrative tumor, recurring, in 90% of cases, within a few centimeters of the surgical resection cavity, even with adjuvant chemo/radiotherapy. Residual GB cells left in the margins or infiltrating the brain parenchyma shelter behind the extremely fragile and sensitive brain tissue and may favor recurrence. Tools for eliminating these cells without damaging the brain microenvironment are urgently required. We propose a strategy involving the implantation, into the tumor bed after resection, of a scaffold to concentrate and trap these cells, to facilitate their destruction by targeted therapies, such as stereotactic radiosurgery. We used bacterial cellulose (BC), an easily synthesized and modifiable random nanofibrous biomaterial, to make the trap. We showed that the structure of BC membranes was ideal for trapping tumor cells and that BC implants were biocompatible with brain parenchyma. We also demonstrated the visibility of BC on magnetic resonance imaging, making it possible to follow its fate in clinical situations and to define the target volume for stereotactic radiosurgery more precisely. Furthermore, BC membranes can be loaded with chemoattractants, which were released and attracted tumor cells in vitro. This is of particular interest for trapping GB cells infiltrating tissues within a few centimeters of the resection cavity. Our data suggest that BC membranes could be a scaffold of choice for implantation after surgical resection to trap residual GB cells. STATEMENT OF SIGNIFICANCE: Glioblastoma is a highly infiltrative tumor, recurring, in 90% of cases, within a few centimeters of the surgical resection cavity, even with adjuvant chemo/radiotherapy. Residual tumor cells left in the margins or infiltrating the brain parenchyma shelter behind the extremely fragile and sensitive brain tissue and contribute to the risk of recurrence. Finding tools to eliminate these cells without damaging the brain microenvironment is a real challenge. We propose a strategy involving the implantation, into the walls of the surgical resection cavity, of a scaffold to concentrate and trap the residual tumor cells, to facilitate their destruction by targeted therapies, such as stereotactic radiosurgery.
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Affiliation(s)
- Lila Autier
- Département de Neurochirurgie, CHU, Angers, France; CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France; Département de Neurologie, CHU, Angers, France
| | - Anne Clavreul
- Département de Neurochirurgie, CHU, Angers, France; CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France.
| | - Maximiliano L Cacicedo
- Nanobiomaterials Lab, CINDEFI, School of Sciences, National University of La Plata-CONICET (CCT La Plata), Buenos Aires, Argentina
| | - Florence Franconi
- PRISM, Plate-forme de recherche en imagerie et spectroscopie multi-modales, PRISM-Icat, UNIV Angers, Angers, France; MINT, Micro & Nanomedecines Translationnelles, UNIV Angers, INSERM U1066, CNRS UMR 6021, Angers, France
| | - Laurence Sindji
- CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France
| | - Audrey Rousseau
- CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France; Laboratoire Pathologie Cellulaire et Tissulaire, CHU, Angers, France
| | - Rodolphe Perrot
- SCIAM, Service Commun d'Imageries et d'Analyses Microscopiques, UNIV Angers, Angers, France
| | | | - Guillermo R Castro
- Nanobiomaterials Lab, CINDEFI, School of Sciences, National University of La Plata-CONICET (CCT La Plata), Buenos Aires, Argentina
| | - Philippe Menei
- Département de Neurochirurgie, CHU, Angers, France; CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France
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Dydak K, Junka A, Szymczyk P, Chodaczek G, Toporkiewicz M, Fijałkowski K, Dudek B, Bartoszewicz M. Development and biological evaluation of Ti6Al7Nb scaffold implants coated with gentamycin-saturated bacterial cellulose biomaterial. PLoS One 2018; 13:e0205205. [PMID: 30356274 PMCID: PMC6200220 DOI: 10.1371/journal.pone.0205205] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 09/20/2018] [Indexed: 11/18/2022] Open
Abstract
Herein we present an innovative method of coating the surface of Titanium-Aluminium-Niobium bone scaffold implants with bacterial cellulose (BC) polymer saturated with antibiotic. Customized Ti6Al7Nb scaffolds manufactured using Selective Laser Melting were immersed in a suspension of Komagataeibacter xylinus bacteria which displays an ability to produce a 3-dimensional structure of bio-cellulose polymer. The process of complete implant coating with BC took on average 7 days. Subsequently, the BC matrix was cleansed by means of alkaline lysis and saturated with gentamycin. Scanning electron microscopy revealed that BC adheres and penetrates into the implant scaffold structure. The viability and development of the cellular layer on BC micro-structure were visualized by means of confocal microscopy. The BC-coated implants displayed a significantly lower cytotoxicity against osteoblast and fibroblast cell cultures in vitro in comparison to non-coated implants. It was also noted that gentamycin released from BC-coated implants inhibited the growth of Staphylococcus aureus cultures in vitro, confirming the suitability of such implant modification for preventing hostile microbial colonization. As demonstrated using digital microscopy, the procedure used for implant coating and BC chemical cleansing did not flaw the biomaterial structure. The results presented herein are of high translational value with regard to future use of customized, BC-coated and antibiotic-saturated implants designed for use in orthopedic applications to speed up recovery and to reduce the risk of musculoskeletal infections.
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Affiliation(s)
- Karolina Dydak
- Department of Pharmaceutical Microbiology and Parasitology, Wroclaw Medical University, Wrocław, Poland
| | - Adam Junka
- Department of Pharmaceutical Microbiology and Parasitology, Wroclaw Medical University, Wrocław, Poland
| | - Patrycja Szymczyk
- Center for Advanced Manufacturing Technologies (CAMT/FPC), Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Wrocław, Poland
| | - Grzegorz Chodaczek
- Laboratory of Confocal Microscopy, Polish Center for Technology Development PORT, Wrocław, Wrocław, Poland
| | - Monika Toporkiewicz
- Laboratory of Confocal Microscopy, Polish Center for Technology Development PORT, Wrocław, Wrocław, Poland
| | - Karol Fijałkowski
- Department of Immunology, Microbiology and Physiological Chemistry, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology, Szczecin, Szczecin, Poland
| | - Bartłomiej Dudek
- Laboratory of Microbiology, Polish Center for Technology Development PORT, Wrocław, Wrocław, Poland
| | - Marzenna Bartoszewicz
- Department of Pharmaceutical Microbiology and Parasitology, Wroclaw Medical University, Wrocław, Poland
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Abstract
Hemoptysis is a frequent manifestation of a wide variety of diseases, with mild to life-threatening presentations. The diagnostic workup and the management of severe hemoptysis are often challenging. Advances in endoscopic techniques have led to different new therapeutic approaches. Cold saline, vasoconstrictive and antifibrinolytic agents, oxidized regenerated cellulose, biocompatible glue, laser photocoagulation, argon plasma coagulation, and endobronchial stents and valves are amongst the tools available to the bronchoscopist. In this article, we review the evidence regarding the definition, etiology, diagnostic modalities, and treatment of severe hemoptysis in the modern era with emphasis on bronchoscopic techniques.
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Affiliation(s)
- Sébastien Gagnon
- Institut Universitaire de Pneumologie et de Cardiologie de Québec, 2725 Ch Ste-Foy, Quebec City, QC, Canada G1V 4G5
| | - Nicholas Quigley
- Institut Universitaire de Pneumologie et de Cardiologie de Québec, 2725 Ch Ste-Foy, Quebec City, QC, Canada G1V 4G5
| | - Hervé Dutau
- Hôpital Nord Marseille, Assistance Publique des Hôpitaux de Marseille, 13915 Chemin des Bourrely, Marseille, France
| | - Antoine Delage
- Institut Universitaire de Pneumologie et de Cardiologie de Québec, 2725 Ch Ste-Foy, Quebec City, QC, Canada G1V 4G5
| | - Marc Fortin
- Institut Universitaire de Pneumologie et de Cardiologie de Québec, 2725 Ch Ste-Foy, Quebec City, QC, Canada G1V 4G5
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Umebayashi Zanoti MD, Megumi Sonobe H, Lima Ribeiro SJ, Minarelli Gaspar AM. Development of coverage and its evaluation in the treatment of chronic wounds. Invest Educ Enferm 2017; 35:330-339. [PMID: 29767913 DOI: 10.17533/udea.iee.v35n3a09] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 08/30/2017] [Indexed: 06/08/2023]
Abstract
OBJECTIVES To describe the development of the bacterial cellulose coating with anti-inflammatory Ibuprofen (BC/Ibu) and to evaluate the cicatrization process with its use in patients with chronic wounds of venous and diabetic etiology. METHODS Longitudinal descriptive study. The cellulose membrane, cultivated with bacteria Gluconacetobacter xylinus and with incorporation of Ibuprofen, was used in the treatment of patients with chronic wounds in public health services in a Brazilian municipality. The ideal coverage characteristics were evaluated through physical, chemical and cell proliferation tests. RESULTS The sample consisted of 14 patients (10 women and 4 men), 8 with venous ulcer, 5 with diabetic foot and one with mixed wound. There was reduction of area and pain in 9 lesions; total healing of 3 wounds; and debridement of the devitalized tissue in 5 wounds with increased area. The use of the membrane was important in the reduction of pain, exudation and ease in the accomplishment of the curative. CONCLUSIONS BC/Ibu favored the cicatrization process of patients with chronic vasculogenic wounds.
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Peng Y, Yang W, Wang Y, Fan X, Zheng X, Gai J. [A multicenter, randomized controlled trial of wheat cellulose particles in the treatment of internal hemorrhoids]. Zhonghua Wei Chang Wai Ke Za Zhi 2017; 20:792-797. [PMID: 28722093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To evaluate the efficacy and safety of wheat cellulose particles (testa triticum tricum purify, Fiberform) in the treatment of internal hemorrhoid. METHODS A multicenter randomized controlled clinical trial was adopted. From October 2015 to July 2016, 60 patients with internal hemorrhoid were enrolled from three medical centers, including Department of Anorectum, Shuguang Hospital of Shanghai University of Traditional Chinese Medicine, Department of Anorectum, The Third Affiliated Hospital of Nanjing University of Chinese Medicine, Department of Anorectum, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine. Enrollment criteria: Patients aging from 18 to 65 years old; being diagnosed with the second or third grade internal hemorrhoid; having good communication skills and being able to complete the records and follow-ups according to the research program requirements. EXCLUSION CRITERIA Patients combined with other anal diseases, or whose anus tube or rectum suffering occupying lesions; patients currently using other methods and defecation drugs in the treatment of their hemorrhoids; patients in pregnancy or with diseases of heart, liver, kidney or metabolic disorders; patients suffering from constipation due to other diseases and drugs, and long-term laxatives abusers. According to the random number table method, 60 patients were randomly divided into the combined treatment group [30 cases, wheat cellulose particles 1 bag each time, 2 times per day; Diosmin tablet 2 pills, 2 times per day] and the single treatment group [30 cases, Diosmin tablet 2 pills, 2 times per day]. The treatment courses for both groups were 7 days. According to the four-grade scoring method, the efficacy evaluation would be made on six indicators, which were the degree of hematochezia or bleeding, the degree of pain, hemorrhoid prolapse, the shapes and properties of stool, the defecation frequency and the defecation duration. The higher the score a participant got, the more severe the symptom was. The effectiveness was evaluated by the scoring reduction rate, and marked effectiveness and effectiveness were both found to be effective. Incidence of adverse events was compared between two groups before the treatment, and on postoperative 3-day and 7-day respectively. RESULTS There were no significant differences between two groups in gender, age, internal hemorrhoids gradings, disease course, and onset time as well as the baseline data, such as the degree of hematochezia or bleeding before the treatment, the degree of pain, hemorrhoid prolapse, the shapes and properties of stool, the defecation frequency and the defecation duration (all P>0.05). After the seven-day treatment, there was significant difference in effective rate between combination group and single group [96.7%(29/30) vs. 66.7%(20/30), Z=-4.376, P=0.000]. Meanwhile, the scores of combined group and single group in hematochezia or bleeding were 0(0, 1) and 0(0, 2) (Z=9.241, P=0.002); in shapes and properties of stool were 0(0, 1) and 0(0, 1) (Z=5.364, P=0.021); in defecation frequency were 0(0, 1) and 0(0, 2) (Z=7.552, P=0.006); and in defecation duration were 0(0, 1) and 0(0, 2) (Z=4.425, P=0.035), whose differences were all significant. The scores of pain degree and hemorrhoid prolapse of two groups also decreased, but the difference was not statistically significant (P>0.05). During the treatment, abdominal pain, diarrhea and other adverse reactions were not observed in participants of two groups. CONCLUSION Combination therapy of wheat cellulose particles (testa triticum tricum purify, Fiberform) can significantly improve the efficacy of internal hemorrhoid with safety and tolerance.
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Affiliation(s)
- Yunhua Peng
- Department of Anorectal, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Wei Yang
- Department of Anorectal, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Yehuang Wang
- Department of Anorectal, The Third Hospital Affiliated to Nanjing University of Chinese Medicine, Nanjing 210001, China
| | - Xiaohua Fan
- Department of Anorectal, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510120, China
| | - Xueping Zheng
- Department of Anorectal, The Third Hospital Affiliated to Nanjing University of Chinese Medicine, Nanjing 210001, China
| | - Juanjuan Gai
- Department of Anorectal, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510120, China
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Li YY, J X, Li PZ, Wan LL. [Clinical effects assessment of nasal cellulose powder on allergic rhinitis]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:138-141. [PMID: 29871205 DOI: 10.13201/j.issn.1001-1781.2017.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Indexed: 06/08/2023]
Abstract
Objective:To evaluate the role of nasal cellulose powder locally applied in allergic rhinitis patients.Method:Fifty patients with allergic rhinitis were divided randomly into two groups: the study group and the control group. The study group were treated with nasal cellulose powder while the control group were treated with physiological sea water.Objective and subjective examinations (nasal airway resistance, nasal syndrome score, rhinoconjunctivitis qualityof life questionnaire and olfactory function,nasal mucus cilia clearance ) were performed before and 3 months after treatment.Result:After treatment, partial parameters in nasal syndrome store ( nasal itching, nasal discharge,sneezing and total store) and rhinoconjunctivitis qualityof life questionnaire (sleep, nasal symptom, non-hay-fever symptom, emotional function and total score) in the study group were significantly improved than those in the control group (P< 0.05). However, no significant difference was found in olfactory function, Nasal airway resistance, nasal mucus cilia clearance and the eye symptom in rhinoconjunctivitis qualityof life questionnaire between the two groups after treatment (P> 0.05). No adverse reaction was found in both groups.Conclusion:Nasal cellulose powder can help alleviate clinical symptoms and improve the quality of life in allergic rhinitis patients with no significant side effect.
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Affiliation(s)
- Y Y Li
- Department of Otolaryngology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, 223300, China
| | - X J
- Department of Otolaryngology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, 223300, China
| | - P Z Li
- Department of Otolaryngology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, 223300, China
| | - L L Wan
- Department of Otolaryngology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, 223300, China
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Boer WH, Liem Y, de Beus E, Abrahams AC. Acute reactions to polysulfone/polyethersulfone dialysers: literature review and management. Neth J Med 2017; 75:4-13. [PMID: 28124665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Acute dialyser reactions in patients treated by haemodialysis are uncommon. We present two cases of such reactions, both in patients using a polysulfone, steam-sterilised dialyser. Patient 1 suffered from recurrent attacks of acute dyspnoea, hypoxia and hypotension that occurred early in dialysis sessions, whereas patient 2 presented with unexplained episodes of severe hypotension and vomiting in the initial phases of dialysis. After switching to a cellulose triacetate dialyser, both patients became asymptomatic during all subsequent dialysis sessions, but intentional (patient 1) and accidental (patient 2) rechallenge with the polysulfone dialyser induced an immediate recurrence of the symptoms. A literature search yielded 30 additional cases that have been reported since the turn of the century. All dialysers that provoked acute reactions contained membranes belonging to the polyarylsulfone family (polysulfone/polyethersulfone, PSu/PESu). Manifestations, usually occurring within the first 30 minutes of dialysis, included dyspnoea (69%), hypotension (66%), hypoxia (44%), bronchospasm (25%), chest pain (22%), pruritus and/or urticaria (22%) and abdominal symptoms (22%). Of the 32 patients, 14 were switched to a different PSu/PESu containing dialyser, which resulted in cross-reactivity in 12 of them (~85%). They could be treated safely with dialysers containing substituted cellulose (n = 8) or polyacrylonitrile (n = 4). Sixteen patients were successfully switched directly to a dialyser containing substituted cellulose (n = 11), polymethylmethacrylate (n = 4) or polyacrylonitrile (n = 1). Two patients were lost to follow-up. As rechallenges may be harmful, patients with acute reactions to PSu/PESu membranes should not be further tested in a trial-and-error fashion with similar membranes, but be switched directly to a non-PSu/PESu dialyser.
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Affiliation(s)
- W H Boer
- Department of Nephrology, University Medical Center, Utrecht, the Netherlands
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Abstract
BACKGROUND Venous leg ulcers (VLUs) are open skin wounds on the lower leg that occur because of poor blood flow in the veins of the leg; leg ulcers can last from weeks to years, and are both painful and costly. Prevalence in the UK is about 2.9 cases per 10,000 people. First-line treatment for VLUs is compression therapy, but around 60% of people have unhealed ulcers after 12 weeks' treatment and about 40% after 24 weeks; therefore, there is scope for further improvement. Limited evidence suggests non-healing leg ulcers may have persisting elevated levels of proteases, which is thought to deter the later stages of healing; thus, timely protease-modulating matrix (PMM) treatments may improve healing by physically removing proteases from the wound fluid. OBJECTIVES To determine the effects of protease-modulating matrix (PMM) treatments on the healing of venous leg ulcers, in people managed in any care setting. SEARCH METHODS In September 2016 we searched: the Cochrane Wounds Specialised Register; CENTRAL; Ovid MEDLINE; Ovid MEDLINE (In-Process & Other Non-Indexed Citations); Ovid Embase and EBSCO CINAHL Plus. We also searched clinical trials registries for ongoing and unpublished studies, and scanned reference lists of relevant included studies as well as reviews, meta-analyses and health technology reports to identify additional studies. There were no restrictions with respect to language, date of publication or study setting. SELECTION CRITERIA We searched for published or unpublished randomised controlled trials (RCTs) that evaluated PMM treatments for VLUs. We defined PMM treatments as those with a purposeful intent of reducing proteases. Wound healing was the primary endpoint. DATA COLLECTION AND ANALYSIS Two review authors independently performed study selection, risk of bias assessment and data extraction. MAIN RESULTS We included 12 studies (784 participants) in this review; sample sizes ranged from 10 to 187 participants (median 56.5). One study had three arms that were all relevant to this review and all the other studies had two arms. One study was a within-participant comparison. All studies were industry funded. Two studies provided unpublished data for healing.Nine of the included studies compared PMM treatments with other treatments and reported results for the primary outcomes. All treatments were dressings. All studies also gave the participants compression bandaging. Seven of these studies were in participants described as having 'non-responsive' or 'hard-to-heal' ulcers. Results, reported at short, medium and long durations and as time-to-event data, are summarised for the comparison of any dressing regimen incorporating PMM versus any other dressing regimen. The majority of the evidence was of low or very low certainty, and was mainly downgraded for risk of bias and imprecision.It is uncertain whether PMM dressing regimens heal VLUs quicker than non-PMM dressing regimens (low-certainty evidence from 1 trial with 100 participants) (HR 1.21, 95% CI 0.74 to 1.97).In the short term (four to eight weeks) it is unclear whether there is a difference between PMM dressing regimens and non-PMM dressing regimens in the probability of healing (very low-certainty evidence, 2 trials involving 207 participants).In the medium term (12 weeks), it is unclear whether PMM dressing regimens increase the probability of healing compared with non-PMM dressing regimens (low-certainty evidence from 4 trials with 192 participants) (RR 1.28, 95% CI 0.95 to 1.71). Over the longer term (6 months), it is also unclear whether there is a difference between PMM dressing regimens and non-PMM dressing regimens in the probability of healing (low certainty evidence, 1 trial, 100 participants) (RR 1.06, 95% CI 0.80 to 1.41).It is uncertain whether there is a difference in adverse events between PMM dressing regimens and non-PMM dressing regimens (low-certainty evidence from 5 trials, 363 participants) (RR 1.03, 95% CI 0.75 to 1.42). It is also unclear whether resource use is lower for PMM dressing regimens (low-certainty evidence, 1 trial involving 73 participants), or whether mean total costs in a German healthcare setting are different (low-certainty evidence, 1 trial in 187 participants). One cost-effectiveness analysis was not included because effectiveness was not based on complete healing. AUTHORS' CONCLUSIONS The evidence is generally of low certainty, particularly because of risk of bias and imprecision of effects. Within these limitations, we are unclear whether PMM dressing regimens influence venous ulcer healing relative to dressing regimens without PMM activity. It is also unclear whether there is a difference in rates of adverse events between PMM and non-PMM treatments. It is uncertain whether either resource use (products and staff time) or total costs associated with PMM dressing regimens are different from those for non-PMM dressing regimens. More research is needed to clarify the impact of PMM treatments on venous ulcer healing.
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Affiliation(s)
- Maggie J Westby
- University of Manchester, Manchester Academic Health Science CentreDivision of Nursing, Midwifery & Social Work, School of Health Sciences, Faculty of Biology, Medicine & HealthJean McFarlane BuildingOxford RoadManchesterUKM13 9PL
| | - Gill Norman
- University of Manchester, Manchester Academic Health Science CentreDivision of Nursing, Midwifery & Social Work, School of Health Sciences, Faculty of Biology, Medicine & HealthJean McFarlane BuildingOxford RoadManchesterUKM13 9PL
| | - Jo C Dumville
- University of Manchester, Manchester Academic Health Science CentreDivision of Nursing, Midwifery & Social Work, School of Health Sciences, Faculty of Biology, Medicine & HealthJean McFarlane BuildingOxford RoadManchesterUKM13 9PL
| | - Nikki Stubbs
- Leeds Community Healthcare NHS Trust, St Mary's HospitalWound Prevention and Management Service3 Greenhill RoadLeedsUKLS12 3QE
| | - Nicky Cullum
- University of Manchester, Manchester Academic Health Science CentreDivision of Nursing, Midwifery & Social Work, School of Health Sciences, Faculty of Biology, Medicine & HealthJean McFarlane BuildingOxford RoadManchesterUKM13 9PL
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Son KH, Choi CH, Park KY, Park CH. Which animal model is proper for evaluation of a muscular ventricular septal defect closure device? Eur J Cardiothorac Surg 2015; 49:1295. [PMID: 26351398 DOI: 10.1093/ejcts/ezv304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 08/03/2015] [Indexed: 11/14/2022] Open
Affiliation(s)
- Kuk Hui Son
- Department of Thoracic and Cardiovascular Surgery, Gachon University Gil Medical Center, Gachon University, Incheon, Korea
| | - Chang Hu Choi
- Department of Thoracic and Cardiovascular Surgery, Gachon University Gil Medical Center, Gachon University, Incheon, Korea
| | - Kook Yang Park
- Department of Thoracic and Cardiovascular Surgery, Gachon University Gil Medical Center, Gachon University, Incheon, Korea
| | - Chul Hyun Park
- Department of Thoracic and Cardiovascular Surgery, Gachon University Gil Medical Center, Gachon University, Incheon, Korea
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Wan L, Li P. [Clinical efficacy of nasal cellulose powder for the treatment of allergic rhinitis]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2015; 29:1340-1342. [PMID: 26685397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To investigate the clinical efficacy of nasal cellulose powder for the treatment of allergic rhinitis. METHOD Thirty-six cases of patients with allergic rhinitis were randomly divided into control group and experimental group, 18 cases in each group. The control group was treated with physiological sea water and the experimental group with nasal fibrous powder. In 14, 28 days after drug evaluation in patients objective and subjective symptoms and signs improved nasal function (nasal airway resistance, the sense of smell) was compared. RESULT The experimental group and the control group of subjective symptoms and objective nasal function were improved, but the experimental group was significantly higher than that of control group, the difference was statistically significant (P<0.05); Two groups of patients had no adverse reaction occurred. CONCLUSION The clinical curative effect of Nasal cellulose powder used in the treatment of allergic rhinitis is distinct, without adverse reactions, and is conducive to improving patient stuffy nose, nasal itching, sneezing and other symptoms and improve the patients quality of life, is worth clinical use.
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Rees A, Powell LC, Chinga-Carrasco G, Gethin DT, Syverud K, Hill KE, Thomas DW. 3D Bioprinting of Carboxymethylated-Periodate Oxidized Nanocellulose Constructs for Wound Dressing Applications. Biomed Res Int 2015; 2015:925757. [PMID: 26090461 PMCID: PMC4452270 DOI: 10.1155/2015/925757] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 09/30/2014] [Indexed: 11/23/2022]
Abstract
Nanocellulose has a variety of advantages, which make the material most suitable for use in biomedical devices such as wound dressings. The material is strong, allows for production of transparent films, provides a moist wound healing environment, and can form elastic gels with bioresponsive characteristics. In this study, we explore the application of nanocellulose as a bioink for modifying film surfaces by a bioprinting process. Two different nanocelluloses were used, prepared with TEMPO mediated oxidation and a combination of carboxymethylation and periodate oxidation. The combination of carboxymethylation and periodate oxidation produced a homogeneous material with short nanofibrils, having widths <20 nm and lengths <200 nm. The small dimensions of the nanofibrils reduced the viscosity of the nanocellulose, thus yielding a material with good rheological properties for use as a bioink. The nanocellulose bioink was thus used for printing 3D porous structures, which is exemplified in this study. We also demonstrated that both nanocelluloses did not support bacterial growth, which is an interesting property of these novel materials.
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Affiliation(s)
- Adam Rees
- Welsh Centre for Printing and Coating (WCPC), Swansea University, Swansea SA2 8PP, UK
| | - Lydia C. Powell
- Centre for NanoHealth, Swansea University, Swansea, UK
- Tissue Engineering and Reparative Dentistry, Cardiff University School of Dentistry, Cardiff CF14 4XY, UK
| | - Gary Chinga-Carrasco
- Paper and Fibre Research Institute (PFI), Høgskoleringen 6b, 7491 Trondheim, Norway
| | - David T. Gethin
- Welsh Centre for Printing and Coating (WCPC), Swansea University, Swansea SA2 8PP, UK
| | - Kristin Syverud
- Paper and Fibre Research Institute (PFI), Høgskoleringen 6b, 7491 Trondheim, Norway
| | - Katja E. Hill
- Tissue Engineering and Reparative Dentistry, Cardiff University School of Dentistry, Cardiff CF14 4XY, UK
| | - David W. Thomas
- Tissue Engineering and Reparative Dentistry, Cardiff University School of Dentistry, Cardiff CF14 4XY, UK
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Peacock M. The mechanisms of hypercalciuria are unnecessary for treatment of recurrent renal calcium stone formers. Contrib Nephrol 2015; 33:152-62. [PMID: 6288323 DOI: 10.1159/000407072] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Pak CY, Nicar M, Northcutt C. The definition of the mechanism of hypercalciuria is necessary for the treatment of recurrent stone formers. Contrib Nephrol 2015; 33:136-51. [PMID: 6749417 DOI: 10.1159/000407071] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Trinchieri A, Mandressi A, Zanetti G, Patelli E, Donghi G, Rocco F. Urinary calcium and magnesium variations during sodium cellulose phosphate treatment. Contrib Nephrol 2015; 37:41-4. [PMID: 6713878 DOI: 10.1159/000408547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Abstract
Hypercalciuria may be due to increased bone resorption, increased intestinal absorption, increased renal excretion or due to hypophosphatemia. Examination of the serum for calcium, phosphorus, parathyroid hormone and 1,25(OH)2D3, and of the urine for calcium, phosphorus and cyclic AMP will help arrive at the correct diagnosis. Therapies specific for each type of hypercalciuria are available and can be used. However, a more simplified diagnostic approach, and the use of thiazide diuretics for therapy, will usually suffice in the majority of patients.
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Alvarez OM, Phillips TJ, Menzoian JO, Patel M, Andriessen A. An RCT to compare a bio-cellulose wound dressing with a non-adherent dressing in VLUs. J Wound Care 2014; 21:448-53. [PMID: 22990398 DOI: 10.12968/jowc.2012.21.9.448] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To compare the efficacy of a bio-cellulose dressing (BWD) versus a non-adherent wound contact layer in venous leg ulcer (VLU) outpatients. METHOD In a prospective, randomised, controlled multicentre study, 48 VLU patients were randomised to receive compression bandages and either standard care (non-adherent dressing; n=23) or a BWD (Suprasorb X; n=25). VLUs were evaluated for debridement efficacy, time to 75-100% granulation and ≥ 50% re-epithelialisation, reduction of ulcer size and patient-reported ulcer pain, comparing the status at day 0 and weekly, over a 12-week study treatment period. RESULTS Thirty-three patients (n=18 BWD and n=15 control dressing) were included in the analysis. Autolytic debridement was significantly faster in the BWD group, with an 84% removal of yellow tissue compared with 26% in the control group, over the 12-week period (p < 0.0001). A median of 25 days were required to achieve 75-100% granulation in the BWD group vs 36 days for controls. A median of 36 days was taken to achieve ≥ 50% re-epithelialisation in the BWD group vs 50 days for controls. Patient-reported ulcer pain reduced significantly faster in the BWD group (p < 0.05), by week 7, 100% of patients reported no pain, compared with 63% of controls. CONCLUSION Autolytic debridement was faster and more effective in the BWD group compared with standard care, as was pain reduction. Although the time to healing was shorter with the BWD vs standard care, the difference was not statistically significant. DECLARATION OF INTEREST This study was supported by Xylos Corporation. The study product was called X-Cell at the time, and is now available as Suprasorb X (Lohmann & Rauscher). Each principal investigator (Alvarez, Phillips, Menzoian, Etris-Brown) and respective clinical centre received funding for the conduct of the study. Each site executed a clinical study agreement independently with the sponsor. The sponsors had no role in the design and conduct of the study, in the collection, analysis, or interpretation of data, or in the preparation of the manuscript, review, or approval of the manuscript. None of the authors received administrative, technical or material support for the conduct of this study. The authors have no relevant financial interest in this article.
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Xu C, Ma X, Chen S, Tao M, Yuan L, Jing Y. Bacterial cellulose membranes used as artificial substitutes for dural defection in rabbits. Int J Mol Sci 2014; 15:10855-67. [PMID: 24937688 PMCID: PMC4100185 DOI: 10.3390/ijms150610855] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 05/22/2014] [Accepted: 06/03/2014] [Indexed: 12/03/2022] Open
Abstract
To improve the efficacy and safety of dural repair in neurosurgical procedures, a new dural material derived from bacterial cellulose (BC) was evaluated in a rabbit model with dural defects. We prepared artificial dura mater using bacterial cellulose which was incubated and fermented from Acetobacter xylinum. The dural defects of the rabbit model were repaired with BC membranes. All surgeries were performed under sodium pentobarbital anesthesia, and all efforts were made to minimize suffering. All animals were humanely euthanized by intravenous injection of phenobarbitone, at each time point, after the operation. Then, the histocompatibility and inflammatory effects of BC were examined by histological examination, real-time fluorescent quantitative polymerase chain reaction (PCR) and Western Blot. BC membranes evenly covered the surface of brain without adhesion. There were seldom inflammatory cells surrounding the membrane during the early postoperative period. The expression of inflammatory cytokines IL-1β, IL-6 and TNF-α as well as iNOS and COX-2 were lower in the BC group compared to the control group at 7, 14 and 21 days after implantation. BC can repair dural defects in rabbit and has a decreased inflammatory response compared to traditional materials. However, the long-term effects need to be validated in larger animals.
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Affiliation(s)
- Chen Xu
- Department of Neurosurgery, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Yishan Road 600, Shanghai 200233, China.
| | - Xia Ma
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
| | - Shiwen Chen
- Department of Neurosurgery, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Yishan Road 600, Shanghai 200233, China.
| | - Meifeng Tao
- School of Life Sciences and Biotechnology, Shanghai Jiaotong University, Dongchuan Road 800, Shanghai 200240, China.
| | - Lutao Yuan
- Department of Neurosurgery, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Yishan Road 600, Shanghai 200233, China.
| | - Yao Jing
- Department of Neurosurgery, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Yishan Road 600, Shanghai 200233, China.
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Mohite BV, Patil SV. A novel biomaterial: bacterial cellulose and its new era applications. Biotechnol Appl Biochem 2014; 61:101-10. [PMID: 24033726 DOI: 10.1002/bab.1148] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Accepted: 08/15/2013] [Indexed: 11/07/2022]
Abstract
Bacterial cellulose (BC) is a promising natural polymer that is produced by bacteria and that has unique and desirable structural, physical, and chemical properties. From the time when the remarkable properties of BC were found 15 years ago compared with plant cellulose, interest has grown in BC and it has become an article of trade in diverse applications. Following this trend, this paper reviews the progress of relevant studies, including general information about cellulose, production by microorganisms as well as BC cultivation, and its properties. The applications reviewed in the present article comprise biological and nonbiological fields. The latest use of BC in the biomedical, environmental, agricultural, electronic, food, and industrial fields is discussed with its applications in composite form. The present article attempts to amass the assorted uses of BC under one umbrella. Thus, recent advances in BC applications in different fields are thoroughly reviewed. This article concludes with the need for future research of BC to make it commercialized as vital biomaterial.
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Affiliation(s)
- Bhavna V Mohite
- School of Life Sciences, North Maharashtra University, Jalagoan, MS, India
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Eshghi P, Jenabzade A, Habibpanah B. A self-controlled comparative clinical trial to explore the effectiveness of three topical hemostatic agents for stopping severe epistaxis in pediatrics with inherited coagulopathies. ACTA ACUST UNITED AC 2013; 19:361-4. [PMID: 24164872 DOI: 10.1179/1607845413y.0000000135] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVE The aim of this study was to assess the effectiveness of localized treatments to persistently stop epistaxis in patients with inherited bleeding disorders. METHODS In a self-controlled comparative clinical trial, to offer the best solution to stop epistaxis at home (within 10 minutes), patients with inherited bleeding disorders were treated using three different topical hemostatic agents, including Tranexamic acid impregnated tampon, EpiCell tampon prepared from oxidized regenerated cellulose pad, and ChitoHem tampon (reinforced with chitosan). The results of using these different products on three groups of randomly selected patients were ultimately compared using the χ(2) and Fisher's exact test statistics. RESULTS A total of 31 patients, 5 females and 26 males with a mean age of 5.6 years, were included in the study. Twenty-three patients had Glanzmann disease, four had von-Willebrand disease, two had Bernard soulier syndrome, two had activated factor VII deficiency, and one patient had impaired secretion of adenosine deaminase. The study exhibited that statistically there was no significant difference between EpiCell tampon and Tranexamic acid impregnated tampon treatments with respect to the hemostasis duration. However, ChitoHem tampon was more efficient than Tranexamic acid impregnated tampon (P value <0.001) and EpiCell tampon (P value < 0.05). CONCLUSION ChitoHem tampon, the chitosan-reinforced product, was the best therapy solution to stop epistaxis. We recommend further research on the use of other hemostatic agents for localized bleeding in patients with inherited bleeding disorders.
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Kim J, Kim SW, Park S, Lim KT, Seonwoo H, Kim Y, Hong BH, Choung YH, Chung JH. Bacterial cellulose nanofibrillar patch as a wound healing platform of tympanic membrane perforation. Adv Healthc Mater 2013; 2:1525-31. [PMID: 23554356 DOI: 10.1002/adhm.201200368] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 01/10/2013] [Indexed: 11/10/2022]
Abstract
Bacterial cellulose (BC)-based biomaterials on medical device platforms have gained significant interest for tissue-engineered scaffolds or engraftment materials in regenerative medicine. In particular, BC has an ultrafine and highly pure nanofibril network structure and can be used as an efficient wound-healing platform since cell migration into a wound site is strongly meditated by the structural properties of the extracellular matrix. Here, the fabrication of a nanofibrillar patch by using BC and its application as a new wound-healing platform for traumatic tympanic membrane (TM) perforation is reported. TM perforation is a very common clinical problem worldwide and presents as conductive hearing loss and chronic perforations. The BC nanofibrillar patch can be synthesized from Gluconacetobacter xylinus; it is found that the patch contained a network of nanofibrils and is transparent. The thickness of the BC nanofibrillar patch is found to be approximately 10.33 ± 0.58 μm, and the tensile strength and Young's modulus of the BC nanofibrillar patch are 11.85 ± 2.43 and 11.90 ± 0.48 MPa, respectively, satisfying the requirements of an ideal wound-healing platform for TM regeneration. In vitro studies involving TM cells show that TM cell proliferation and migration are stimulated under the guidance of the BC nanofibrillar patch. In vivo animal studies demonstrate that the BC nanofibrillar patch promotes the rate of TM healing as well as aids in the recovery of TM function. These data demonstrate that the BC nanofibrillar patch is a useful wound-healing platform for TM perforation.
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Affiliation(s)
- Jangho Kim
- Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Seoul, 151-742 Republic of Korea
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Parolini C, Manzini S, Busnelli M, Rigamonti E, Marchesi M, Diani E, Sirtori CR, Chiesa G. Effect of the combinations between pea proteins and soluble fibres on cholesterolaemia and cholesterol metabolism in rats. Br J Nutr 2013; 110:1394-401. [PMID: 23458494 DOI: 10.1017/s0007114513000639] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Many functional foods and dietary supplements have been reported to be beneficial for the management of dyslipidaemia, one of the major risk factors for CVD. Soluble fibres and legume proteins are known to be a safe and practical approach for cholesterol reduction. The present study aimed at investigating the hypocholesterolaemic effect of the combinations of these bioactive vegetable ingredients and their possible effects on the expression of genes regulating cholesterol homeostasis. A total of six groups of twelve rats each were fed, for 28 d, Nath's hypercholesterolaemic diets, differing in protein and fibre sources, being, respectively, casein and cellulose (control), pea proteins and cellulose (pea), casein and oat fibres (oat), casein and apple pectin (pectin), pea proteins and oat fibres (pea+oat) and pea proteins and apple pectin (pea+pectin). Administration of each vegetable-containing diet was associated with lower total cholesterol concentrations compared with the control. The combinations (pea+oat and pea+pectin) were more efficacious than fibres alone in modulating cholesterolaemia ( - 53 and - 54%, respectively, at 28 d; P< 0·005). In rats fed the diets containing oat fibres or apple pectin, alone or in combination with pea proteins, a lower hepatic cholesterol content (P< 0·005) and higher hepatic mRNA concentrations of CYP7A1 and NTCP were found when compared with the control rats (P< 0·05). In summary, the dietary combinations of pea proteins and oat fibres or apple pectin are extremely effective in lowering plasma cholesterol concentrations in rats and affect cellular cholesterol homeostasis by up-regulating genes involved in hepatic cholesterol turnover.
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Affiliation(s)
- Cinzia Parolini
- Department of Pharmacological Sciences, Università degli Studi di Milano, via Balzaretti 9, 20133 Milan, Italy
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Figueiredo AGPR, Figueiredo ARP, Alonso-Varona A, Fernandes SCM, Palomares T, Rubio-Azpeitia E, Barros-Timmons A, Silvestre AJD, Pascoal Neto C, Freire CSR. Biocompatible bacterial cellulose-poly(2-hydroxyethyl methacrylate) nanocomposite films. Biomed Res Int 2013; 2013:698141. [PMID: 24093101 PMCID: PMC3777182 DOI: 10.1155/2013/698141] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Accepted: 07/15/2013] [Indexed: 11/17/2022]
Abstract
A series of bacterial cellulose-poly(2-hydroxyethyl methacrylate) nanocomposite films was prepared by in situ radical polymerization of 2-hydroxyethyl methacrylate (HEMA), using variable amounts of poly(ethylene glycol) diacrylate (PEGDA) as cross-linker. Thin films were obtained, and their physical, chemical, thermal, and mechanical properties were evaluated. The films showed improved translucency compared to BC and enhanced thermal stability and mechanical performance when compared to poly(2-hydroxyethyl methacrylate) (PHEMA). Finally, BC/PHEMA nanocomposites proved to be nontoxic to human adipose-derived mesenchymal stem cells (ADSCs) and thus are pointed as potential dry dressings for biomedical applications.
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Affiliation(s)
| | - Ana R. P. Figueiredo
- Department of Chemistry and CICECO, Campus de Santiago, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Ana Alonso-Varona
- Department of Cellular Biology and Histology, Faculty of Medicine and Odontology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940 Leioa, Spain
| | - Susana C. M. Fernandes
- Department of Chemistry and CICECO, Campus de Santiago, University of Aveiro, 3810-193 Aveiro, Portugal
- “Materials + Technologies” Group, Department of Chemical and Environmental Engineering, Polytechnic School, University of the Basque Country (UPV/EHU), Plaza Europa 1, 20018 San Sebastián, Spain
| | - Teodoro Palomares
- Department of Cellular Biology and Histology, Faculty of Medicine and Odontology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940 Leioa, Spain
| | - Eva Rubio-Azpeitia
- Department of Cellular Biology and Histology, Faculty of Medicine and Odontology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940 Leioa, Spain
| | - Ana Barros-Timmons
- Department of Chemistry and CICECO, Campus de Santiago, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Armando J. D. Silvestre
- Department of Chemistry and CICECO, Campus de Santiago, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Carlos Pascoal Neto
- Department of Chemistry and CICECO, Campus de Santiago, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Carmen S. R. Freire
- Department of Chemistry and CICECO, Campus de Santiago, University of Aveiro, 3810-193 Aveiro, Portugal
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Kim H, Bartley GE, Young SA, Seo KH, Yokoyama W. Altered hepatic gene expression profiles associated with improved fatty liver, insulin resistance, and intestinal permeability after hydroxypropyl methylcellulose (HPMC) supplementation in diet-induced obese mice. J Agric Food Chem 2013; 61:6404-6411. [PMID: 23742138 DOI: 10.1021/jf400545w] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The effect of hydroxypropyl methylcellulose (HPMC) on hepatic gene expression was analyzed by exon microarray and real-time PCR from livers of diet-induced obese (DIO) mice fed a high-fat (HF) diet supplemented with either 6% HPMC or 6% microcrystalline cellulose (MCC). HPMC-fed mice exhibited significantly reduced body weight gain (55% lower compared to MCC), liver weight (13%), plasma LDL-cholesterol concentration (45%), and HF diet-increased intestinal permeability (48%). HPMC significantly reduced areas under the curve for 2 h insulin and glucose responses, indicating enhanced insulin sensitivity and glucose metabolism. HPMC up-regulated hepatic genes related to fatty acid oxidation, cholesterol and bile acid synthesis, and cellular activation of glucocorticoid (bile acid recycling) and down-regulated genes related to oxidative stress, triglyceride synthesis, and polyunsaturated fatty acid elongation. In conclusion, HPMC consumption ameliorates the effects of a HF diet on intestinal permeability, insulin resistance, hepatic lipid accumulation, glucocorticoid-related bile acid recycling, oxidative stress, and weight gain in DIO mice.
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Affiliation(s)
- Hyunsook Kim
- Department of Nutrition, University of California, Davis, California 95616, USA.
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Yin G, Wei C, Guo X, Chen H, Hou C. [Experimental study on hemostasis of thermosensitive chitosan hemostatic film]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2013; 27:624-627. [PMID: 23879105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
OBJECTIVE To investigate the hemostasis of thermosensitive chitosan hemostatic film. METHODS Fifty adult Sprague Dawley rats, male or female and weighing 190-210 g, were made the models of liver injury. The models were randomly divided into 5 groups (n=10) depending on different hemostatic materials. The incision of the liver was covered with the hemostatic materials of 2.0 cm x 1.0 cm x 0.5 cm in size: thermosensitive chitosan hemostatic film (group A), chitosan hemostatic film (group B), cellulose hemostatic cotton (group C), gelatin sponge (group D), and no treatment (group E), respectively. The bleeding time and bleeding amount were recorded. After 4 weeks, the incisions of the liver were observed with HE staining. RESULTS Gross observation showed better hemostatic effect and faster hemostatic time in groups A, B, and C; group D had weaker hemostatic effect and slower hemostatic time; group E had no hemostatic effect. The bleeding time and bleeding amount of groups A, B, C, and D were significantly lower than those of group E (P < 0.05). The bleeding time and bleeding amount of groups A, B, and C were significantly lower than those of group D (P < 0.05), but no significant difference was found among groups A, B, and C (P > 0.05). The liver cells of group A had milder edema and ballooning degeneration than other 4 groups through histological observation. CONCLUSION The thermosensitive chitosan hemostatic film has good hemostasis effect on the liver incision of rats.
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Affiliation(s)
- Gang Yin
- Department of Orthopaedics, Shanghai Changzheng Hospital, Shanghai, 200003, PR China
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Yoshino A, Tabuchi M, Uo M, Tatsumi H, Hideshima K, Kondo S, Sekine J. Applicability of bacterial cellulose as an alternative to paper points in endodontic treatment. Acta Biomater 2013; 9:6116-22. [PMID: 23268234 DOI: 10.1016/j.actbio.2012.12.022] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Revised: 12/15/2012] [Accepted: 12/17/2012] [Indexed: 12/01/2022]
Abstract
Dental root canal treatment is required when dental caries progress to infection of the dental pulp. A major goal of this treatment is to provide complete decontamination of the dental root canal system. However, the morphology of dental root canal systems is complex, and many human dental roots have inaccessible areas. In addition, dental reinfection is fairly common. In conventional treatment, a cotton pellet and paper point made from plant cellulose is used to dry and sterilize the dental root canal. Such sterilization requires a treatment material with high absorbency to remove any residue, the ability to improve the efficacy of intracanal medication and high biocompatibility. Bacterial cellulose (BC) is produced by certain strains of bacteria. In this study, we developed BC in a pointed form and evaluated its applicability as a novel material for dental canal treatment with regard to solution absorption, expansion, tensile strength, drug release and biocompatibility. We found that BC has excellent material and biological characteristics compared with conventional materials, such as paper points (plant cellulose). BC showed noticeably higher absorption and expansion than paper points, and maintained a high tensile strength even when wet. The cumulative release of a model drug was significantly greater from BC than from paper points, and BC showed greater compatibility than paper points. Taken together, BC has great potential for use in dental root canal treatment.
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Affiliation(s)
- Aya Yoshino
- Department of Oral and Maxillofacial Surgery, Shimane University Faculty of Medicine, Izumo, Japan
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Yang J, Wang HP, Zhou L, Xu CF. Effect of dietary fiber on constipation: A meta analysis. World J Gastroenterol 2012; 18:7378-7383. [PMID: 23326148 PMCID: PMC3544045 DOI: 10.3748/wjg.v18.i48.7378] [Citation(s) in RCA: 148] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2012] [Revised: 10/01/2012] [Accepted: 11/13/2012] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the effect of dietary fiber intake on constipation by a meta-analysis of randomized controlled trials (RCTs).
METHODS: We searched Ovid MEDLINE (from 1946 to October 2011), Cochrane Library (2011), PubMed for articles on dietary fiber intake and constipation using the terms: constipation, fiber, cellulose, plant extracts, cereals, bran, psyllium, or plantago. References of important articles were searched manually for relevant studies. Articles were eligible for the meta-analysis if they were high-quality RCTs and reported data on stool frequency, stool consistency, treatment success, laxative use and gastrointestinal symptoms. The data were extracted independently by two researchers (Yang J and Wang HP) according to the described selection criteria. Review manager version 5 software was used for analysis and test. Weighted mean difference with 95%CI was used for quantitative data, odds ratio (OR) with 95%CI was used for dichotomous data. Both I2 statistic with a cut-off of ≥ 50% and the χ2 test with a P value < 0.10 were used to define a significant degree of heterogeneity.
RESULTS: We searched 1322 potential relevant articles, 19 of which were retrieved for further assessment, 14 studies were excluded for various reasons, five studies were included in the analysis. Dietary fiber showed significant advantage over placebo in stool frequency (OR = 1.19; 95%CI: 0.58-1.80, P < 0.05). There was no significant difference in stool consistency, treatment success, laxative use and painful defecation between the two groups. Stool frequency were reported by five RCTs, all results showed either a trend or a significant difference in favor of the treatment group, number of stools per week increased in treatment group than in placebo group (OR = 1.19; 95%CI: 0.58-1.80, P < 0.05), with no significant heterogeneity among studies (I2= 0, P = 0.77). Four studies evaluated stool consistency, one of them presented outcome in terms of percentage of hard stool, which was different from others, so we included the other three studies for analysis. Two studies reported treatment success. There was significant heterogeneity between the studies (P < 0.1, I2 > 50%). Three studies reported laxative use, quantitative data was shown in one study, and the pooled analysis of the other two studies showed no significant difference between treatment and placebo groups in laxative use (OR = 1.07; 95%CI 0.51-2.25), and no heterogeneity was found (P = 0.84, I2= 0). Three studies evaluated painful defecation: one study presented both quantitative and dichotomous data, the other two studies reported quantitative and dichotomous data separately. We used dichotomous data for analysis.
CONCLUSION: Dietary fiber intake can obviously increase stool frequency in patients with constipation. It does not obviously improve stool consistency, treatment success, laxative use and painful defecation.
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Hung SC, Yokoyama W, Kim H, Bartley G, Anderson WHK, Albers DR, Langhorst ML, Williams DM, Stott W, Turowski M, Young SA. Effects of cationic hydroxyethyl cellulose on dyslipidemia in hamsters. J Agric Food Chem 2012; 60:11149-11156. [PMID: 23083223 DOI: 10.1021/jf302095c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Cationic hydroxyethyl cellulose (cHEC) was supplemented in a high-fat diet to determine if this new soluble fiber had an effect on hypercholesterolemia and dyslipidemia associated with cardiovascular disease using Golden Syrian hamster as an animal model. Supplementation of 3-5% cHEC in a high-fat diet for 4 weeks led to significant weight gain reduction in hamsters. In addition, significant decreases in adipose and liver weights, concentrations of plasma total, VLDL, and LDL cholesterol, and hepatic lipids were shown. No significant improvements in glucose and insulin levels were observed with cHEC; however, a significant increase in plasma adiponectin and a decrease in leptin were observed. As compared with controls, 8% cHEC-fed hamsters had greater levels of mRNA for CYP7A1 (cytochrome P450 7A1; 2-fold of control; P < 0.05), CYP51 (lanosterol 14α-demethylase; 6-fold of control; P < 0.05), and LDLR (LDL receptor; 1.5-fold of control) in the liver. These findings suggest the possibility of the use of cHEC for cholesterol reduction and beneficial effects on the cardiovascular risk factors.
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Battista A, Novi A, Giamundo P, Battista RA, Picheo R, Dionigi P. Local hemostatic effect of cellulose tampons (Tampax) after stapled hemorrhoidopexy. Int J Colorectal Dis 2012; 27:545-6. [PMID: 21655921 DOI: 10.1007/s00384-011-1251-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/30/2011] [Indexed: 02/04/2023]
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Young SA, Hung SC, Anderson WHK, Albers DR, Langhorst ML, Yokoyama W. Effects of cationic hydroxyethyl cellulose on glucose metabolism and obesity in a diet-induced obesity mouse model. J Diabetes 2012; 4:85-94. [PMID: 21895999 DOI: 10.1111/j.1753-0407.2011.00157.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND To investigate the effect of a new soluble fiber, namely cationic hydroxyethyl cellulose (cHEC), on weight loss and metabolic disorders associated with obesity using a high-fat diet-induced obese mouse model. METHODS Obese male C57BL/6J (B6) mice were fed high-fat (60% kcal) diets supplemented with cHEC for 5 weeks. Body weight, energy intake, mesenteric adipose and liver weights, plasma cholesterol, plasma insulin, glucose, adiponectin, and leptin were assessed to determine the effects of cHEC. Hepatic and fecal lipids were also analyzed to investigate the effect of cHEC on lipid absorption and metabolism. RESULTS Supplementation of the high-fat diet with cHEC resulted in significant weight loss in obese mice. In addition, significant decreases were seen in mesenteric adipose and liver weights, as well as concentrations of plasma cholesterol and hepatic lipids. A significant improvement in glucose homeostasis, insulin sensitivity, and leptin concentrations were observed at 4% cHEC. Moreover, increases in fecal excretion of total bile acids, sterols, and fats indicated altered fat absorption when cHEC was supplemented in the diet. CONCLUSIONS We have shown in the present study that cHEC reduces body weight, improves insulin sensitivity, and prevents the development of metabolic syndrome. Furthermore, the effects of cHEC on glucose and lipid homeostasis in B6 mice are mediated by improvements in leptin sensitivity resulting from reduced fat absorption.
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Affiliation(s)
- Scott A Young
- The Dow Chemical Company, Midland, Michigan 48667, USA.
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Segarra TJ, Fakioglu E, Cheshenko N, Wilson SS, Mesquita PMM, Doncel GF, Herold BC. Bridging the gap between preclinical and clinical microbicide trials: blind evaluation of candidate gels in murine models of efficacy and safety. PLoS One 2011; 6:e27675. [PMID: 22096611 PMCID: PMC3214080 DOI: 10.1371/journal.pone.0027675] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2011] [Accepted: 10/21/2011] [Indexed: 11/18/2022] Open
Abstract
Background Despite significant protection in preclinical studies, cellulose sulfate (CS) failed to protect women against HIV-1/2 and was associated with a trend toward increased HIV-1 acquisition in one of the clinical trials. These results highlight the need for preclinical tests more predictive of clinical outcomes. The objective of this study was to test coded vaginal gels, including CS, in murine models of safety and efficacy to determine the models' utility for evaluating future products. Methods Four coded formulations, including 6% CS, 2% PRO 2000 and two placebo gels, were administered intravaginally to medroxyprogesterone-treated mice and their ability to prevent genital herpes (efficacy) or to alter the susceptibility to low dose HSV challenge (safety) was determined. Nonoyxnol-9 served as a positive toxicity control. Results CS and PRO 2000 significantly protected mice from genital herpes following infection with a laboratory or clinical isolate of HSV-2 introduced in buffer (p<0.001). However, protection was reduced when virus was introduced in seminal plasma. Moreover, mice were significantly more susceptible to infection with low doses of HSV-2 when challenged 12 h after the 7th daily dose of CS or nonoxynol-9 (p<0.05). The increased susceptibility was associated with alterations in epithelial architecture. Conclusions CS prevented genital herpes when present at the time of viral challenge, but increased the rate of infection when gel was applied daily for 7 days with a vaginal wash prior to viral inoculation. The findings presumably reflect altered epithelial architecture, which may have contributed to the trend towards increased HIV observed clinically.
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Affiliation(s)
- Theodore J. Segarra
- Department of Pediatrics and Microbiology-Immunology, Albert Einstein College of Medicine, Bronx, New York, United States of America
| | - Esra Fakioglu
- Department of Pediatrics and Microbiology-Immunology, Albert Einstein College of Medicine, Bronx, New York, United States of America
| | - Natalia Cheshenko
- Department of Pediatrics and Microbiology-Immunology, Albert Einstein College of Medicine, Bronx, New York, United States of America
| | - Sarah S. Wilson
- Department of Pediatrics and Microbiology-Immunology, Albert Einstein College of Medicine, Bronx, New York, United States of America
| | - Pedro M. M. Mesquita
- Department of Pediatrics and Microbiology-Immunology, Albert Einstein College of Medicine, Bronx, New York, United States of America
| | - Gustavo F. Doncel
- CONRAD, Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Betsy C. Herold
- Department of Pediatrics and Microbiology-Immunology, Albert Einstein College of Medicine, Bronx, New York, United States of America
- * E-mail:
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Crucitti T, Taylor D, Beelaert G, Fransen K, Van Damme L. Performance of a rapid and simple HIV testing algorithm in a multicenter phase III microbicide clinical trial. Clin Vaccine Immunol 2011; 18:1480-5. [PMID: 21752945 PMCID: PMC3165239 DOI: 10.1128/cvi.05069-11] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Accepted: 07/06/2011] [Indexed: 11/20/2022]
Abstract
A multitest sequential algorithm based on rapid and simple (R/S) assays was applied for the diagnosis of HIV infection among participants in a phase 3 microbicide effectiveness trial. HIV testing was performed on finger-prick blood samples obtained from patients after their enrollment in the trial. The specimens were tested in a serial procedure using three different rapid tests (Determine HIV-1/2 [Abbott], SD Bioline HIV-1/2 3.0 [Standard Diagnostics], and Uni-Gold HIV [Trinity Biotech]). In the event of discordant results between the Determine HIV-1/2 and SD Bioline HIV-1/2 3.0 tests, the third assay (Uni-Gold HIV) determined the final outcome. When the final outcome was positive, a second specimen was collected and tested with the same algorithm, only if a positive result was obtained with this sample the participant was informed of her positive serostatus. A total of 5,734 postenrollment specimens obtained from 1,398 women were tested. Forty-six women tested positive according to the testing algorithm performed on the first collected specimen. Confirmatory testing results obtained at the ITM confirmed that 42 women were truly infected. Two of four initial false positives tested negative upon analysis of a second blood specimen. The other two tested false positive twice using specimens collected the same day. A high percentage of specimens reactive with the Determine HIV-1/2 assay was only observed at the study site in Kampala. This result did not appear to be associated with pregnancy or malaria infection. We conclude that HIV testing algorithms, including only R/S assays, are suitable for use in clinical trials, provided that adequate quality assurance procedures are in place.
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Affiliation(s)
- Tania Crucitti
- HIV/STI Reference Laboratory, Institute of Tropical Medicine, 155 Nationalestraat, 2000 Antwerp, Belgium.
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Spagnoli AM, Monacelli G, Rizzo MI, Fallico N, Scuderi N. Extensive facial trauma caused by dog bites in woman suffering from systemic fluconazole-resistant Candida infection. G Chir 2011; 32:376-378. [PMID: 22018261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
INTRODUCTION Dog bites present a complex problem. Extensive facial trauma is a challenging problem to treat with priority for functional outcome. This paper describes the conservative treatment in a very difficult case of facial trauma with unusual infections due to the bites. CASE REPORT A 45 year-old woman was admitted in hypovolaemic shock with amputation of nose, upper and lower lips, left cheek and chin caused by dog bites. After vital parameters and volaemy were stabilized, wound toilet was performed, followed by skin and mucosal rotation flaps and anterior nasal tamponade; the lesion has then been covered with a collagen/oxidized regenerated cellulose dressing and sterile gauzes. Culture test highlighted coagulase-negative Staphylococcus and Candida albicans. However after few days, the patient developed septic-undulant hyperpyrexia, retinitis, renal candidiasis, folliculitis. Systemic Candida infection resistant to fluconazole was diagnosed. Amphotericin B was given to the patient and the facial wound was managed conservatively with an active medication because of inoperability conditions. The outcome of the use of active medications was an immediate response with excessive granulation tissue followed by a rapid re-epithelization. CONCLUSION As our case has shown, conservative treatment can be a valid alternative therapy in the treatment of large wounds with invasive candidosis and candidaemia or other major contraindications to surgery. In fact, in cases where surgical reconstruction is not a feasible option, conservative treatment can allow a rapid repair of the skin barrier.
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Affiliation(s)
- A M Spagnoli
- Department of Plastic Surgery, Sapienza, University of Rome, Italy
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Lu JP, Huang Y, Zhang Y, Wang XH, Shao CH. [Clinical trial of cellulose in treatment of functional constipation in children]. Zhongguo Dang Dai Er Ke Za Zhi 2011; 13:377-380. [PMID: 21575341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
OBJECTIVE To study the efficacy and safety of cellulose for the treatment of functional constipation in children. METHODS A prospective, self-controlled, clinical trial using cellulose was conducted for 2 weeks in 34 children with functional constipation. The constipation symptoms and the characteristics of feces after the treatment were observed. RESULTS The characteristics of feces and the constipation symptoms were improved significantly after the treatment. The total efficacy rate was 37% 3 days after treatment, 87% 7 days after treatment and 90% 14 days after treatment. The satisfactory rates of doctors and children's parents on the therapeutic effects were 57% and 63%, respectively. No adverse events, such as abdominal distention, pain or diarrhea, were observed during the treatment. CONCLUSIONS Cellulose is effective and safe in the treatment of functional constipation in children.
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Affiliation(s)
- Jun-Ping Lu
- Children's Hospital of Fudan University, Shanghai 201102, China
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Acar B, Babademez MA, Karabulut H. Topical hemostatic agents in otolaryngologic surgery. Kulak Burun Bogaz Ihtis Derg 2010; 20:100-109. [PMID: 20214554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Topical hemostatic agents are largely used to reduce blood loss during otolaryngologic surgery. These agents play an important role in both keeping the patient's hemodynamic equilibrium and allowing for a better view of the surgical field. These agents can be classified based on their mechanism of action, and include physical or mechanical agents. Most complications of topical hemostatic agents are sustained because of the antigenic reaction of those products. This paper reviews traditional and newer topical hemostatic agents with regard to their chemical properties, their mechanisms of action, and the benefits and complications of topical agents.
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Affiliation(s)
- Baran Acar
- Department of Otolaryngology, Keçiören Training and Research Hospital, Ankara, Turkey.
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Aframian DJ, Mizrahi B, Granot I, Domb AJ. Evaluation of a mucoadhesive lipid-based bioerodable tablet compared with Biotène mouthwash for dry mouth relief--a pilot study. Quintessence Int 2010; 41:e36-e42. [PMID: 20213013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
OBJECTIVE Salivary gland impairment is a major problem that can result in hyposalivation and a decrease in quality of life. Causes for mouth dryness can be grossly classified into three major groups: iatrogenic, immunogenic, and metabolic. At present, insufficient therapies exist to ease morbidity in this growing number of affected individuals. A need for new products to relieve oral dryness is mandatory. The aim of this study was to evaluate a mucoadhesive lipid-based bioerodable tablet as a novel device to decrease signs and symptoms associated with mouth dryness. METHOD AND MATERIALS Twenty xerostomic patients were divided into two groups. In group 1, the mucoadhesive tablet was applied to the hard palate, while in group 2, Biotène mouthwash was applied and served as a control. Sialometry measurements, as well as a questionnaire assessing mouth dryness, were obtained before and after treatment. RESULTS Application of the mucoadhesive tablets resulted in a significant reduction in the sensation of the mouth dryness (P = .016) compared to Biotène. Moreover, a 1.5-fold increase in unstimulated whole saliva flow was obtained after 30 minutes in the treatment group. CONCLUSION A lipid-based mucoadhesive tablet has a beneficial role in reducing the sensation of dryness in patients with xerostomia.
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Affiliation(s)
- Doron J Aframian
- Department of Oral Medicine, Hadassah Faculty of Dental Medicine, Hebrew University, Jerusalem, Israel.
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Vorob'eva VM, Polukhin DG, Lepilov AV, Smirnov AK. [Experimental study of the wound-healing effect of new drug compositions intended for the therapy of esophageal burns]. Eksp Klin Farmakol 2010; 73:31-34. [PMID: 20369599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The anti-inflammatory and wound-healing effects of new formulations for the treatment of esophageal burns have been studied in Chinchilla rabbits with model chemical burns of skin. The healing process was evaluated according to the clinical and morphological criteria on the 3rd, 7th, 10th, 14th, and 21st day. It is established that the new drugs accelerate the regeneration of skin tissue in comparison to that in the control and reference groups of animals. At the late stage of skin regeneration, this is manifested by reliable differences in the degrees of cicatrization and tissue collagenization. Two hydrophilic polymer-based drug compositions, which are successively applied in accordance with the burn process development, exhibit pronounced anti-inflammatory and skin-regenerative effects. These formulations can be recommended for the therapy of esophageal burns.
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