1
|
Franco-Gil ME, Graça A, Martins A, Marto J, Ribeiro HM. Emollients in dermatological creams: Early evaluation for tailoring formulation and therapeutic performance. Int J Pharm 2024; 653:123825. [PMID: 38253270 DOI: 10.1016/j.ijpharm.2024.123825] [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: 08/09/2023] [Revised: 12/26/2023] [Accepted: 01/19/2024] [Indexed: 01/24/2024]
Abstract
The targeted choice of the emollient of a cream determines its physicochemical properties and clinical effectiveness. This work researched the effects of emollient properties on the final characteristics and potential performance of oil-in-water dermatological creams. Seven emollients with different chemical characteristics and structures (alkane, triglyceride, ether, silicone, vegetable oils, and mineral oil) were tested in a model formulation. Early stability, pH, droplet size distribution, rheology, tackiness, adhesivity, spreadability, tribology, and release profile of a lipophilic substance model (in Franz cells, through a synthetic membrane, for six hours) were assessed. The creams had acid epicutaneous pH and a "shear-thinning" "solid-like" viscoelastic behavior. Among the seven emollients' properties, polarity, density, and viscosity were the most influential. Droplet parameters were the most impacted, pH and release were moderately affected, and the textural properties were lowly to moderately impacted. The emollient substitution in the model formulation affected the experimental parameters differently, allowing formulation optimization and tailoring its potential therapeutic performance regarding drug release, coadjutant effects, and dwell time on the skin. By looking at the creams' characteristics, it was possible to select the best-suited emollients for releasing a lipophilic drug, applying on painful skin, and formulation in wash-off products or leave-on protective barrier creams.
Collapse
Affiliation(s)
- M E Franco-Gil
- Research Institute for Medicines (iMed.UL), Faculty of Pharmacy, Universidade de Lisboa, Avenida Prof. Gama Pinto S/N, 1649-003 Lisboa, Portugal; Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Universidad Complutense de Madrid, Plaza Ramón y Cajal s/n, Ciudad Universitaria, 28040 Madrid, Spain; University Institute of Industrial Pharmacy (IUFI), Faculty of Pharmacy, Universidad Complutense de Madrid, Plaza Ramón y Cajal s/n, Ciudad Universitaria, 28040 Madrid, Spain.
| | - A Graça
- Research Institute for Medicines (iMed.UL), Faculty of Pharmacy, Universidade de Lisboa, Avenida Prof. Gama Pinto S/N, 1649-003 Lisboa, Portugal.
| | - A Martins
- Research Institute for Medicines (iMed.UL), Faculty of Pharmacy, Universidade de Lisboa, Avenida Prof. Gama Pinto S/N, 1649-003 Lisboa, Portugal.
| | - J Marto
- Research Institute for Medicines (iMed.UL), Faculty of Pharmacy, Universidade de Lisboa, Avenida Prof. Gama Pinto S/N, 1649-003 Lisboa, Portugal.
| | - H M Ribeiro
- Research Institute for Medicines (iMed.UL), Faculty of Pharmacy, Universidade de Lisboa, Avenida Prof. Gama Pinto S/N, 1649-003 Lisboa, Portugal.
| |
Collapse
|
2
|
Graça A, Martins AM, Pinto P, Ribeiro HM, Marto J. Combining protection with skin health: In vivo studies of an innovative gelatin/tannic acid-based hydrogel patch to prevent PPE-related skin lesions. Int J Pharm 2024; 650:123731. [PMID: 38142013 DOI: 10.1016/j.ijpharm.2023.123731] [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: 10/18/2023] [Accepted: 12/20/2023] [Indexed: 12/25/2023]
Abstract
The prolonged use of Personal Protective Equipment (PPE) can lead to skin problems due to persistent pressure, friction, and tension. This issue has prompted the exploration of solutions to protect the skin while maintaining the effectiveness of the PPE. This study aimed to evaluate the in vivo effectiveness of a gelatin/tannic acid-based hydrogel patch positioned beneath a mask to alleviate skin damage resulting from mask-wearing. To understand the pressure exerted by PPE, in vitro tests were conducted to measure the tensile strength of three types of facial masks. The FFP2 masks exhibited the highest tensile strength and were selected for subsequent in vivo biometric investigations. Biometric parameters were evaluated using the Flir E50bx® thermographic camera, Corneometer®, MoistureMap®, Sebumeter®, Tewameter®, and VISIA® systems. The results showed that when the hydrogel patch was used under the mask, there were no significant differences in facial skin temperature, sebum levels, or TEWL values (p > 0.05). However, a statistically significant increase in skin hydration and a decrease in frontal redness (p < 0.05) were observed. Consumer acceptance was assessed through sensory analysis questionnaires. In summary, the observed attenuation of physiological changes in the facial area and the positive consumer feedback suggest that this polymeric film-forming system is a simple yet effective solution to prevent PPE use-related skin issues.
Collapse
Affiliation(s)
- Angélica Graça
- Research Institute for Medicine (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
| | - Ana M Martins
- Research Institute for Medicine (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
| | - P Pinto
- Research Institute for Medicine (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal; PhD Trials, Avenida Maria Helena Vieira da Silva, n° 24 A - 1750-182, Lisboa, Portugal
| | - Helena M Ribeiro
- Research Institute for Medicine (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
| | - Joana Marto
- Research Institute for Medicine (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal.
| |
Collapse
|
3
|
Ribeiro R, Bom S, Martins AM, Ribeiro HM, Santos C, Marto J. Towards the personalization of gelatin-based 3D patches: a tunable porous carrier for topical applications. Drug Deliv Transl Res 2023; 13:1799-1812. [PMID: 36633729 PMCID: PMC10125939 DOI: 10.1007/s13346-023-01294-y] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2023] [Indexed: 01/13/2023]
Abstract
Cell-free based therapies, for example, the use of the cell secretome, have emerged as a promising alternative to conventional skin therapies using bioactive and, when combined with 3D printing technologies, allow the development of personalized dosage forms. This research work aimed to develop gelatin-based patches with controlled network topology via extrusion 3D printing, loaded with cell culture medium as a model of the secretome, and applicable as vehicles for topical delivery. Inks were optimized through rheological and printing assays, and the incorporation of medium had minor effects in printability. Regarding network topology, grid infills rendered more defined structures than the triangular layout, depicting clearer pores and pore area consistency. Release studies showed that filament spacing and infill pattern influenced the release of rhodamine B (model bioactive) and bovine serum albumin (model protein). Moreover, the grid patches (G-0.7/1/0.7), despite having around a seven-fold higher mean pore area than 0.7-mm triangular ones (T-0.7), showed a similar release profile, which can be linked to the network topology of the printed structures This work provided insight on employing (bio)printing in the production of carriers with reproducible and controlled pore area, able to incorporate cell-derived secretome and to be quickly tailored to the patient's lesions.
Collapse
Affiliation(s)
- Ricardo Ribeiro
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, 1649-003 Portugal
| | - Sara Bom
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, 1649-003 Portugal
| | - Ana M. Martins
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, 1649-003 Portugal
| | - Helena M. Ribeiro
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, 1649-003 Portugal
| | - Catarina Santos
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, 1649-003 Portugal
- CQE, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisbon, 1049-001 Portugal
- EST Setúbal, Instituto Politécnico de Setúbal, CDP2T Setúbal, Portugal
| | - Joana Marto
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, 1649-003 Portugal
| |
Collapse
|
4
|
Graça A, Rufino I, Martins AM, Raposo S, Ribeiro HM, Marto J. Prevention of skin lesions caused by the use of protective face masks by an innovative gelatin-based hydrogel patch: design and in vitro studies. Int J Pharm 2023; 638:122941. [PMID: 37044229 PMCID: PMC10084707 DOI: 10.1016/j.ijpharm.2023.122941] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 03/20/2023] [Accepted: 04/06/2023] [Indexed: 04/14/2023]
Abstract
The recent Covid-19 pandemics led to the increased use of facial masks, which can cause skin lesions due to continuous pressure, tension and friction forces on the skin. A preventive approach is the inclusion of dressings between the face and the mask. However, there are still uncertainties about the protective effect of dressings and whether their use compromises the efficiency of masks. The current study aimed to develop and test the efficacy of a gelatin-based hydrogel patch to be placed between the mask and the facial area. Design of Experiment with a Quality by Design approach tools were used in the patch development and in vitro characterization was performed through rheological evaluation, ATR-FTIR and molecular docking studies. Furthermore, tribology studies were performed to test the patch performance. The results showed that the addition of excipients enhanced gelation temperature, elasticity and adhesiveness parameters. The interactions between excipients were confirmed by ATR-FTIR and molecular docking. The tribology assay revealed similar friction values at room and physiological temperature, and when testing different skin types. In conclusion, the physical properties and the performance evaluation reported in this study indicate that this innovative film-forming system can be used to prevent skin lesions caused by the continuous use of protective masks.
Collapse
Affiliation(s)
- Angélica Graça
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
| | - Ismael Rufino
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
| | - Ana M Martins
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
| | - Sara Raposo
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
| | - Helena M Ribeiro
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
| | - Joana Marto
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal.
| |
Collapse
|
5
|
Bom S, Ribeiro R, Ribeiro HM, Santos C, Marto J. Corrigendum to “On the progress of hydrogel-based 3D printing: Correlating rheological properties with printing behavior” [Int. J. Pharm. 615 (2022) 121506]. Int J Pharm 2022; 629:122334. [DOI: 10.1016/j.ijpharm.2022.122334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
6
|
Reis ME, Bettencourt A, Ribeiro HM. The regulatory challenges of innovative customized combination products. Front Med (Lausanne) 2022; 9:821094. [PMID: 35935795 PMCID: PMC9354569 DOI: 10.3389/fmed.2022.821094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 06/30/2022] [Indexed: 11/22/2022] Open
Abstract
Background/aims Combination products are therapeutic and/or diagnostic products that can combine drugs and medical devices and which increasing complexity has raised new regulatory framework challenges. To reach the market, a combination product must be classified based on the principal mode of action (PMOA). However, research and technological progress has been leading to the development of novel combination products with no clearly defined PMOA, emphasizing the lack of a systematization process, thus challenging the correct classification of these products. To illustrate the regulatory challenge, two case studies are discussed: innovative combination products with PMOA that can change due to an external stimulus, specifically custom-made 3D-printed scaffolds with incorporated medicinal substances. Methods Data was collected through computational search engines, regulatory agencies and equally relevant associations. The analysis of the data resulted on this state-of-the-art review, a description of the decision-making process by the regulatory authorities, and case studies analysis that culminated in the proposal of a decision-tree scheme. Findings Current regulations do not fully address complex combination products namely personalized 3D-printed scaffolds. Two merged regulatory approaches are suggested along with the schematization of the rational assisted by a decision-tree tool. Conclusion Combination products have become increasingly sophisticated, which has furthered the need to develop multidisciplinary collaborations within the health sector to adapt to these innovative healthcare solutions as well as with regulators to overcome the challenges posed for their classification.
Collapse
|
7
|
Bom S, Ribeiro R, Ribeiro HM, Santos C, Marto J. On the progress of hydrogel-based 3D printing: Correlating rheological properties with printing behaviour. Int J Pharm 2022; 615:121506. [DOI: 10.1016/j.ijpharm.2022.121506] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 01/17/2022] [Accepted: 01/20/2022] [Indexed: 01/16/2023]
|
8
|
Bom S, Martins AM, Ribeiro HM, Marto J. Diving into 3D (bio)printing: A revolutionary tool to customize the production of drug and cell-based systems for skin delivery. Int J Pharm 2021; 605:120794. [PMID: 34119578 DOI: 10.1016/j.ijpharm.2021.120794] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 06/05/2021] [Accepted: 06/07/2021] [Indexed: 12/12/2022]
Abstract
The incorporation of 3D printing technologies in the pharmaceutical industry can revolutionize its R&D, by providing a simple and rapid method to produce tailored one-off batches, each with customized dosages, different compounds, shapes, sizes, and adjusted release rates. Particularly, this type of technology can be advantageous for the development of topical and transdermal drug delivery systems, including patches and microneedles. The use of both systems as drug carriers offers advantages over the oral administration, but the possibility of skin irritation and sensitization, and the high production costs, may hinder the expansion of this market. In this context, 3D printing, a high-resolution technique, allows the design of high quality, personalized, complex and sophisticated structures, thus reducing the production costs and improving the patient compliance. This review covers the 3D printing concept and discusses the relevance of this technology to the pharmaceutical industry, with a special focus on the development of topical and transdermal products - patches and microneedles. The potential of 3D bioprinting for skin applications is also presented, highlighting the development of patch-like skin constructs for wound and burn treatment, and skin equivalents for in vitro research and drug development. Several recent studies were selected to support the relevance of the subjects addressed herein. Additionally, the limitations of these printing technologies are discussed, including regulatory, quality and safety issues.
Collapse
Affiliation(s)
- Sara Bom
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon, Av. Professor Gama Pinto, 1649-003 Lisbon, Portugal.
| | - Ana M Martins
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon, Av. Professor Gama Pinto, 1649-003 Lisbon, Portugal.
| | - Helena M Ribeiro
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon, Av. Professor Gama Pinto, 1649-003 Lisbon, Portugal.
| | - Joana Marto
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon, Av. Professor Gama Pinto, 1649-003 Lisbon, Portugal.
| |
Collapse
|
9
|
Bom S, Santos C, Barros R, Martins AM, Paradiso P, Cláudio R, Pinto PC, Ribeiro HM, Marto J. Effects of Starch Incorporation on the Physicochemical Properties and Release Kinetics of Alginate-Based 3D Hydrogel Patches for Topical Delivery. Pharmaceutics 2020; 12:pharmaceutics12080719. [PMID: 32751818 PMCID: PMC7466037 DOI: 10.3390/pharmaceutics12080719] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/24/2020] [Accepted: 07/30/2020] [Indexed: 12/17/2022] Open
Abstract
The development of printable hydrogel inks for extrusion-based 3D printing is opening new possibilities to the production of new and/or improved pharmaceutical forms, specifically for topical application. Alginate and starch are natural polysaccharides that have been extensively exploited due to their biocompatibility, biodegradability, viscosity properties, low toxicity, and relatively low cost. This research work aimed to study the physicochemical and release kinetic effects of starch incorporation in alginate-based 3D hydrogel patches for topical delivery using a quality by design approach. The incorporation of a pregelatinized starch is also proposed as a way to improve the properties of the drug delivery system while maintaining the desired quality characteristics. Critical material attributes and process parameters were identified, and the sensitivity and adequacy of each parameter were statistically analyzed. The impact of alginate, starch, and CaCl2·2H2O amounts on relevant quality attributes was estimated crosswise. The amount of starch revealed a synergetic impact on porosity (p = 0.0021). An evident increase in the size and quantity of open pores were detected in the as printed patches as well as after crosslinking (15.6 ± 5.2 µm). In vitro drug release studies from the optimized alginate-starch 3D hydrogel patch, using the probe Rhodamine B, showed an initial high burst release, followed by a controlled release mechanism. The results obtained also showed that the viscoelastic properties, printing accuracy, gelation time, microstructure, and release rates can be modulated by varying the amount of starch added to the system. Furthermore, these results can be considered an excellent baseline for future drug release modulation strategies.
Collapse
Affiliation(s)
- Sara Bom
- Research Institute for Medicines (iMed.ULisboa), Universidade de Lisboa, 1649-003 Lisbon, Portugal; (S.B.); (A.M.M.); (P.C.P.); (H.M.R.)
- PhD Trials, Avenida Maria Helena Vieira da Silva, n° 24 A, 1750-182 Lisbon, Portugal
| | - Catarina Santos
- EST Setúbal, CDP2T, Instituto Politécnico de Setúbal, Campus do IPS-Estefanilha, 2910-761 Setúbal, Portugal; (C.S.); (R.C.)
- CQE, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal;
| | - Rita Barros
- Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal;
| | - Ana M. Martins
- Research Institute for Medicines (iMed.ULisboa), Universidade de Lisboa, 1649-003 Lisbon, Portugal; (S.B.); (A.M.M.); (P.C.P.); (H.M.R.)
| | - Patrizia Paradiso
- CQE, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal;
| | - Ricardo Cláudio
- EST Setúbal, CDP2T, Instituto Politécnico de Setúbal, Campus do IPS-Estefanilha, 2910-761 Setúbal, Portugal; (C.S.); (R.C.)
- IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - Pedro Contreiras Pinto
- Research Institute for Medicines (iMed.ULisboa), Universidade de Lisboa, 1649-003 Lisbon, Portugal; (S.B.); (A.M.M.); (P.C.P.); (H.M.R.)
- PhD Trials, Avenida Maria Helena Vieira da Silva, n° 24 A, 1750-182 Lisbon, Portugal
| | - Helena M. Ribeiro
- Research Institute for Medicines (iMed.ULisboa), Universidade de Lisboa, 1649-003 Lisbon, Portugal; (S.B.); (A.M.M.); (P.C.P.); (H.M.R.)
| | - Joana Marto
- Research Institute for Medicines (iMed.ULisboa), Universidade de Lisboa, 1649-003 Lisbon, Portugal; (S.B.); (A.M.M.); (P.C.P.); (H.M.R.)
- Correspondence: ; Tel.: +351-217-946-400
| |
Collapse
|
10
|
Nunes A, Marques P, Marto J, Ascenso A, Gonçalves L, Fitas M, Pinto P, Sotomayor J, Ribeiro HM. Sugar Surfactant‐Based Shampoos. J SURFACTANTS DETERG 2020. [DOI: 10.1002/jsde.12415] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Andreia Nunes
- Departamento de Química, Faculdade de Ciências e TecnologiaUniversidade Nova de Lisboa Caparica 2829‐516 Portugal
- Research Institute for Medicine (iMed.ULisboa), Faculty of PharmacyUniversidade de Lisboa Lisboa Portugal
| | - Paula Marques
- Departamento de Química, Faculdade de Ciências e TecnologiaUniversidade Nova de Lisboa Caparica 2829‐516 Portugal
| | - Joana Marto
- Research Institute for Medicine (iMed.ULisboa), Faculty of PharmacyUniversidade de Lisboa Lisboa Portugal
| | - Andreia Ascenso
- Research Institute for Medicine (iMed.ULisboa), Faculty of PharmacyUniversidade de Lisboa Lisboa Portugal
| | - Lídia Gonçalves
- Research Institute for Medicine (iMed.ULisboa), Faculty of PharmacyUniversidade de Lisboa Lisboa Portugal
| | - Manuel Fitas
- PhD Trials, Avenida Maria Helena Vieira da Silva no 24 A, Lisbon 1750‐182 Portugal
| | - Pedro Pinto
- Research Institute for Medicine (iMed.ULisboa), Faculty of PharmacyUniversidade de Lisboa Lisboa Portugal
- PhD Trials, Avenida Maria Helena Vieira da Silva no 24 A, Lisbon 1750‐182 Portugal
| | - João Sotomayor
- REQUIMTE/LAQV, Departamento de Química, Faculdade de Ciências e TecnologiaUniversidade Nova de Lisboa Caparica 2829‐516 Portugal
| | - Helena M. Ribeiro
- Research Institute for Medicine (iMed.ULisboa), Faculty of PharmacyUniversidade de Lisboa Lisboa Portugal
| |
Collapse
|
11
|
Martins AM, Ascenso A, Ribeiro HM, Marto J. The Brain-Skin Connection and the Pathogenesis of Psoriasis: A Review with a Focus on the Serotonergic System. Cells 2020; 9:E796. [PMID: 32224981 PMCID: PMC7226493 DOI: 10.3390/cells9040796] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 03/17/2020] [Accepted: 03/24/2020] [Indexed: 12/12/2022] Open
Abstract
Psoriasis is a common non-communicable chronic immune-mediated skin disease, affecting approximately 125 million people in the world. Its pathogenesis results from a combination of genetic and environmental factors. The pathogenesis of psoriasis seems to be driven by the interaction between innate immune cells, adaptive immune cells and keratinocytes, in a process mediated by cytokines (including interleukins (IL)-6, IL-17 and IL-22, interferon and tumor necrosis factor) and other signaling molecules. This leads to an inflammatory process with increased proliferation of epidermal cells, neo-angiogenesis and infiltration of dendritic cells in the skin. Dysfunctional de novo glucocorticoid synthesis in psoriatic keratinocytes and the skin microbiome have also been suggested as mediators in the pathogenesis of this disease. To understand psoriasis, it is essential to comprehend the processes underlying the skin immunity and neuroendocrinology. This review paper focuses on the skin as a neuroendocrine organ and summarizes what is known about the skin immune system, the brain-skin connection and the role played by the serotonergic system in skin. Subsequently, the alterations of neuroimmune processes and of the serotonergic system in psoriatic skin are discussed, as well as, briefly, the genetic basis of psoriasis.
Collapse
Affiliation(s)
| | | | | | - Joana Marto
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia da Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal; (A.M.M.); (A.A.); (H.M.R.)
| |
Collapse
|
12
|
Gregorí Valdés BS, Gomes CSB, Gomes PT, Ascenso JR, Diogo HP, Gonçalves LM, Galhano Dos Santos R, Ribeiro HM, Bordado JC. Synthesis and Characterization of Isosorbide-Based Polyurethanes Exhibiting Low Cytotoxicity Towards HaCaT Human Skin Cells. Polymers (Basel) 2018; 10:polym10101170. [PMID: 30961095 PMCID: PMC6403884 DOI: 10.3390/polym10101170] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 10/12/2018] [Accepted: 10/17/2018] [Indexed: 12/02/2022] Open
Abstract
The synthesis of four samples of new polyurethanes was evaluated by changing the ratio of the diol monomers used, poly(propylene glycol) (PPG) and D-isosorbide, in the presence of aliphatic isocyanates such as the isophorone diisocyanate (IPDI) and 4,4′-methylenebis(cyclohexyl isocyanate) (HMDI). The thermal properties of the four polymers obtained were determined by DSC, exhibiting Tg values in the range 55–70 °C, and their molecular structure characterized by FTIR, 1H, and 13C NMR spectroscopies. The diffusion coefficients of these polymers in solution were measured by the Pulse Gradient Spin Echo (PGSE) NMR method, enabling the calculation of the corresponding hydrodynamic radii in diluted solution (1.62–2.65 nm). The molecular weights were determined by GPC/SEC and compared with the values determined by a quantitative 13C NMR analysis. Finally, the biocompatibility of the polyurethanes was assessed using the HaCaT keratinocyte cell line by the MTT reduction assay method showing values superior to 70% cell viability.
Collapse
Affiliation(s)
- Barbara S Gregorí Valdés
- CERENA, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
- Research Institute for Medicine and Pharmaceutical Science (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
| | - Clara S B Gomes
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Pedro T Gomes
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - José R Ascenso
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Hermínio P Diogo
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Lídia M Gonçalves
- Research Institute for Medicine and Pharmaceutical Science (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
| | - Rui Galhano Dos Santos
- CERENA, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Helena M Ribeiro
- Research Institute for Medicine and Pharmaceutical Science (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
| | - João C Bordado
- CERENA, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| |
Collapse
|
13
|
Abstract
Pharmaceutical research has been focussed on developing improved delivery systems while exploring new ways of using approved excipients. The present work investigated the potential of starch nanocapsules (StNC) as a topical delivery platform for hydrophilic antimicrobial drugs using minocycline hydrochloride (MH) as a model drug. Thus, a quality by design approach was used to assess the role of different factors that affect the main pharmaceutical properties of StNC prepared using an emulsification-solvent evaporation method. Full characterisation was performed in terms of particle size, encapsulation efficiency, morphology and physical stability at 5 ± 3 °C. Results show the surfactant and lipid contents play a major role in StNC particle size distribution. The MH loading only promoted minor changes upon StNC properties. Formulations were stable without variations on physicochemical properties. All tested formulations presented a zeta-potential of +33.6 ± 6.7 mV, indicating a good physical stability and evidencing that StNC are suitable nanocarriers for topical use.
Collapse
Affiliation(s)
- J M Marto
- a Faculty of Pharmacy, Research Institute for Medicines (iMed.ULisboa) , Universidade de Lisboa , Lisboa , Portugal
| | - L F Gouveia
- a Faculty of Pharmacy, Research Institute for Medicines (iMed.ULisboa) , Universidade de Lisboa , Lisboa , Portugal
| | - L M D Gonçalves
- a Faculty of Pharmacy, Research Institute for Medicines (iMed.ULisboa) , Universidade de Lisboa , Lisboa , Portugal
| | - H M Ribeiro
- a Faculty of Pharmacy, Research Institute for Medicines (iMed.ULisboa) , Universidade de Lisboa , Lisboa , Portugal
| | - A J Almeida
- a Faculty of Pharmacy, Research Institute for Medicines (iMed.ULisboa) , Universidade de Lisboa , Lisboa , Portugal
| |
Collapse
|
14
|
Marto J, Ruivo E, Lucas SD, Gonçalves LM, Simões S, Gouveia LF, Felix R, Moreira R, Ribeiro HM, Almeida AJ. Starch nanocapsules containing a novel neutrophil elastase inhibitor with improved pharmaceutical performance. Eur J Pharm Biopharm 2018; 127:1-11. [PMID: 29409864 DOI: 10.1016/j.ejpb.2018.01.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 01/07/2018] [Accepted: 01/17/2018] [Indexed: 12/22/2022]
Abstract
Psoriasis and atopic dermatitis patients show an excessive amount of elastase in peripheral blood neutrophils due to an imbalance between this proteolytic enzyme and its endogenous inhibitors, the search for new human neutrophil elastase (HNE) inhibitors are required. The HNE is an attractive therapeutic target and inhibitors with new molecular architectures have been extensively investigated. In this context a promising novel synthetic human neutrophil elastase inhibitor (ER143) was associated to a starch-based nanoparticulate system (StNC) with improved pharmaceutical performance, using a quality by design approach to support product development and optimization. The resulting formulation was characterized in terms of and in vitro release, permeation and retention studies in newborn pig skin, using Franz diffusion cells revealing the StNC have the ability to control the drug release rate and contribute to a high skin retention and/or permeation profiles. The anti-inflammatory activity accessed in vivo using the croton oil-induced ear inflammation model in mice showed that erythema and edema were attenuated in 98% following local application. These observations suggest the association of ER143 to the StNC promotes a deeper skin penetration and retention, also confirming StNC as a potential topical delivery system.
Collapse
Affiliation(s)
- J Marto
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal
| | - E Ruivo
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal
| | - S D Lucas
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal
| | - L M Gonçalves
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal
| | - S Simões
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal
| | - L F Gouveia
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal
| | - R Felix
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal
| | - R Moreira
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal.
| | - H M Ribeiro
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal
| | - A J Almeida
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal.
| |
Collapse
|
15
|
Affiliation(s)
- Joana Marto
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal
| | - Andreia Ascenso
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal
| | - Sandra Simoes
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal
| | - António J. Almeida
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal
| | - Helena M. Ribeiro
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal
| |
Collapse
|
16
|
Marto J, Gouveia LF, Gonçalves LM, Gaspar DP, Pinto P, Carvalho FA, Oliveira E, Ribeiro HM, Almeida AJ. A Quality by design (QbD) approach on starch-based nanocapsules: A promising platform for topical drug delivery. Colloids Surf B Biointerfaces 2016; 143:177-185. [PMID: 27003468 DOI: 10.1016/j.colsurfb.2016.03.039] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Revised: 03/11/2016] [Accepted: 03/14/2016] [Indexed: 11/24/2022]
Abstract
Exploring novel applications for approved excipients with a history of safe use in therapeutics is a smart strategy to obtain improved pharmaceutical products. The present study aimed at developing a novel starch-based nanoparticulate carrier system (StNC) for topical delivery of lipophilic bioactive molecules. The role of the different factors that affect the particle size distribution and zeta potential of StNC prepared by the emulsification-solvent evaporation method was assessed using a quality by design approach. An optimal formulation was selected and fully characterized in terms of molecular interactions (DSC and FTIR), morphology (TEM and AFM), as well as in vitro and in vivo biological properties, including biological sensitivity/irritation studies performed in human volunteers. Results show the surfactant and lipid contents play a major role in StNC particle size distribution. In addition, all tested formulations presented a zeta potential of ca. +33.6±6.7 mV, indicating a good physical stability, while revealing an excellent compromise between stability, safety and cosmeticity, evidencing that StNC are suitable nanocarriers for topical use. Finally, the design planning methodology has clearly shown its usefulness for optimizing the formulation, being also crucial for the understanding of StNC formation process. The StNC proved to be a promising formulation strategy and a potential nanocarrier for topical lipophilic bioactive molecules.
Collapse
Affiliation(s)
- J Marto
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal
| | - L F Gouveia
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal
| | - L M Gonçalves
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal
| | - D P Gaspar
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal
| | - P Pinto
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal
| | - F A Carvalho
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - E Oliveira
- Laboratórios Atral S.A., Vala do Carregado, Portugal
| | - H M Ribeiro
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal
| | - A J Almeida
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Portugal.
| |
Collapse
|
17
|
Marto J, Ascenso A, Gonçalves LM, Gouveia LF, Manteigas P, Pinto P, Oliveira E, Almeida AJ, Ribeiro HM. Melatonin-based pickering emulsion for skin's photoprotection. Drug Deliv 2016; 23:1594-607. [PMID: 26755411 DOI: 10.3109/10717544.2015.1128496] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
CONTEXT Based on its antioxidant activity, melatonin was recently found to have a protection effect against photocarcinogenesis. OBJECTIVE This work aimed to develop an innovative sunscreen formulation based on the Pickering emulsions concept, stabilized by physical UV filters, modified starch and natural oils associated to melatonin as a key strategy for prevention against UV-induced skin damage. MATERIALS AND METHODS For this purpose, melatonin was incorporated in Pickering emulsions that were characterized using physicochemical, in vitro and in vivo testing. Physicochemical studies included physical and chemical stability by a thorough pharmaceutical control. The possible protective effects of melatonin against UV-induced cell damage in HaCaT cell lines were investigated in vitro. The safety assessment and the in vivo biological properties of the final formulations, including Human Repeat Insult Patch Test and sunscreen water resistance tests were also evaluated. RESULTS AND DISCUSSION These studies demonstrated that melatonin sunscreen Pickering emulsion was beneficial and presented a powerful protection against UVB-induced damage in HaCat cells, including inhibition of apoptosis. The inclusion of zinc oxide, titanium dioxide, green coffee oil and starch ensured a high SPF (50+) against UVA and UVB. CONCLUSION The combination of melatonin, multifunctional solid particles and green coffee oil, contributed to achieve a stable, effective and innovative sunscreen with a meaningful synergistic protection against oxidative stress.
Collapse
Affiliation(s)
- Joana Marto
- a Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon , Portugal and
| | - Andreia Ascenso
- a Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon , Portugal and
| | - Lídia M Gonçalves
- a Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon , Portugal and
| | - Luís F Gouveia
- a Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon , Portugal and
| | - Patrícia Manteigas
- a Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon , Portugal and
| | - Pedro Pinto
- a Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon , Portugal and
| | | | - António J Almeida
- a Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon , Portugal and
| | - Helena M Ribeiro
- a Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon , Portugal and
| |
Collapse
|
18
|
Mancini G, Lopes RM, Clemente P, Raposo S, Gonçalves LMD, Bica A, Ribeiro HM, Almeida AJ. Lecithin and parabens play a crucial role in tripalmitin-based lipid nanoparticle stabilization throughout moist heat sterilization and freeze-drying. EUR J LIPID SCI TECH 2015. [DOI: 10.1002/ejlt.201400431] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Guiliana Mancini
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Lisboa Portugal
| | - Rui M. Lopes
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Lisboa Portugal
| | - Pierpaolo Clemente
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Lisboa Portugal
| | - Sara Raposo
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Lisboa Portugal
| | - Lídia M. D. Gonçalves
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Lisboa Portugal
| | - António Bica
- Laboratório de Estudos Farmacêuticos (LEF); Barcarena Portugal
| | - Helena M. Ribeiro
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Lisboa Portugal
| | - António J. Almeida
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Lisboa Portugal
| |
Collapse
|
19
|
Raposo S, Tavares R, Gonçalves L, Simões S, Urbano M, Ribeiro HM. Mometasone furoate-loaded cold processed oil-in-water emulsions: in vitro and in vivo studies. Drug Deliv 2014; 22:562-72. [PMID: 24559480 DOI: 10.3109/10717544.2013.871086] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Over the years, research has focused on strategies to increase benefit/risk ratio of corticoids. However, vehicles intended for topical glucocorticoids delivery with an improved benefit/risk ratio are still on demand. The aim of this work was the in vitro and in vivo characterization of cold processed oil-in-water (o/w) emulsions intended for mometasone furoate (MF) delivery to induce drug targeting to upper skin strata, decreasing adverse effects. Two o/w emulsions, containing 0.1% of MF, were developed differing in the glycol used (2-methyl-2,4-pentanediol - PT and ethoxydiglycol - TC emulsions). In vitro permeation studies revealed that these emulsions are suitable vehicles for the delivery of MF containing ingredients which are responsible for a drastically increased on the permeability coefficients of MF from a theoretical value of 1.18 × 10(-4 )cm/h to 5.20 × 10(-4) ± 2.05 × 10(-4 )cm/h and 6.30 × 10(-4) ± 2.94 × 10(-4 )cm/h, for PT and TC, respectively. The tape stripping results showed that the amount of drug that reached the viable skin layers was very low (1.99 %) and the amount that remained in the stratum corneum (SC) was 10.61%. The in vivo studies showed that the developed formulations decreased the edema and erythema in mice skin in more that 90%, assuring, at least, the same anti-inflammatory effect compared with the commercial cream. PT placebo demonstrated to contribute to restore the skin barrier by increasing the amount of lipids within the human skin.
Collapse
Affiliation(s)
- Sara Raposo
- Faculty of Pharmacy, Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), University of Lisbon , Lisbon , Portugal and
| | | | | | | | | | | |
Collapse
|
20
|
Raposo S, Salgado A, Gonçalves L, Pinto PC, Urbano M, Ribeiro HM. Safety assessment and biological effects of a new cold processed SilEmulsion for dermatological purpose. Biomed Res Int 2013; 2013:181634. [PMID: 24294598 PMCID: PMC3835651 DOI: 10.1155/2013/181634] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [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: 04/22/2013] [Revised: 08/19/2013] [Accepted: 08/29/2013] [Indexed: 11/17/2022]
Abstract
It is of crucial importance to evaluate the safety profile of the ingredients used in dermatological emulsions. A suitable equilibrium between safety and efficacy is a pivotal concern before the marketing of a dermatological product. The aim was to assess the safety and biological effects of a new cold processed silicone-based emulsion (SilEmulsion). The hazard, exposure, and dose-response assessment were used to characterize the risk for each ingredient. EpiSkin assay and human repeat insult patch tests were performed to compare the theoretical safety assessment to in vitro and in vivo data. The efficacy of the SilEmulsion was studied using biophysical measurements in human volunteers during 21 days. According to the safety assessment of the ingredients, 1,5-pentanediol was an ingredient of special concern since its margin of safety was below the threshold of 100 (36.53). EpiSkin assay showed that the tissue viability after the application of the SilEmulsion was 92 ± 6% and, thus considered nonirritant to the skin. The human studies confirmed that the SilEmulsion was not a skin irritant and did not induce any sensitization on the volunteers, being safe for human use. Moreover, biological effects demonstrated that the SilEmulsion increased both the skin hydration and skin surface lipids.
Collapse
Affiliation(s)
- Sara Raposo
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Faculty of Pharmacy, University of Lisbon, Avenida Prof. Gama Pinto, 1649-003 Lisbon, Portugal
- Laboratório Edol Produtos Farmacêuticos S.A., Estrada Casal Canas Lote 6, 2790-007 Carnaxide, Portugal
| | - Ana Salgado
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Faculty of Pharmacy, University of Lisbon, Avenida Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| | - Lídia Gonçalves
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Faculty of Pharmacy, University of Lisbon, Avenida Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| | - Pedro C. Pinto
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Faculty of Pharmacy, University of Lisbon, Avenida Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| | - Manuela Urbano
- Laboratório Edol Produtos Farmacêuticos S.A., Estrada Casal Canas Lote 6, 2790-007 Carnaxide, Portugal
| | - Helena M. Ribeiro
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Faculty of Pharmacy, University of Lisbon, Avenida Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| |
Collapse
|
21
|
Salgado A, Raposo S, Marto J, Silva AN, Simões S, Ribeiro HM. Mometasone furoate hydrogel for scalp use:in vitroandin vivoevaluation. Pharm Dev Technol 2013; 19:618-22. [DOI: 10.3109/10837450.2013.819012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
22
|
Raposo S, Salgado A, Eccleston G, Urbano M, Ribeiro HM. Cold processed oil-in-water emulsions for dermatological purpose: formulation design and structure analysis. Pharm Dev Technol 2013; 19:417-29. [PMID: 23617265 DOI: 10.3109/10837450.2013.788516] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The aim of this work is to develop, optimize and characterize cold process emulsions that are stable at acidic pH. The main surfactant was selected according to the hydrophilic lipophilic balance (HLB) concept and surface tension, whereas polymers were selected by viscoelastic measurements and analytical centrifugation. It was showed that the inclusion of methyl vinyl ether/maleic anhydride copolymer crosslinked with decadiene (PVM/MA) increased the storage modulus (G') of the gels (23.9-42.1 Pa) two-fold and the droplet migration decreased from 3.66% to 0.95%/h. Cetrimide was selected as a preservative based on its microbiological results and additional contribution to the stability of the emulsions. Four emulsions were developed that differed by the co-emulsifier used (PEG-20 glyceril laurate and polyglyceryl-4-isostearate) and the glycol (2-methyl-2,4-pentanediol and ethoxydiglycol). Viscoelastic measurements and droplet size/microscopic analysis showed that the structure of PEG-20 glyceril laurate emulsion (η' = 76.0 Pa.s at 0.01 Hz and 32.9 ± 3.7 µm, respectively) was stronger compared to polyglyceryl-4-isostearate (η' = 37.4 Pa.s at 0.01 Hz and 37.8 ± 15.7 µm, respectively). Differential scanning calorimetry (DSC) results were in accordance with the latter and showed that PEG-20 glyceril laurate with 2-methyl-2,4-pentanediol corresponded to the strongest structure (|224.4| W °C g(-1)). This cold process allowed a total production savings of more than 17% when compared to the traditional hot process.
Collapse
Affiliation(s)
- Sara Raposo
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Faculty of Pharmacy, University of Lisbon , Lisbon , Portugal
| | | | | | | | | |
Collapse
|
23
|
Trindade P, Mateus D, Gonçalves H, Sachse MF, Machado P, Ribeiro HM, Gouveia AM. TCH-007 Development of a Betamethasone (Dipropionate) Topical Emulsion 0.1% (W/W) (1Mg/G) For Cutaneous T-Cell Lymphoma. Eur J Hosp Pharm 2013. [DOI: 10.1136/ejhpharm-2013-000276.198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
|
24
|
Mateus D, Trindade P, Gonçalves H, Salgado A, Marto J, Machado P, Gouveia AM, Ribeiro HM, Almeida A. TCH-049 Topical Morphine Gels For Painful Wounds. Eur J Hosp Pharm 2013. [DOI: 10.1136/ejhpharm-2013-000276.240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
25
|
Carneiro R, Salgado A, Raposo S, Marto J, Simões S, Urbano M, Ribeiro HM. Topical emulsions containing ceramides: Effects on the skin barrier function and anti-inflammatory properties. EUR J LIPID SCI TECH 2011. [DOI: 10.1002/ejlt.201000495] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
26
|
Ribeiro HM, Morais JA, Eccleston GM. Structure and rheology of semisolid o/w creams containing cetyl alcohol/non-ionic surfactant mixed emulsifier and different polymers. Int J Cosmet Sci 2010; 26:47-59. [PMID: 18494913 DOI: 10.1111/j.0412-5463.2004.00190.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Oil-in-water (o/w) emulsions for cosmetic use, such as lotions and creams, are complex multiple-phase systems, which may contain a number of interacting surfactants, fatty amphiphiles, polymers and other excipients. This study investigates the influence of two synthetic cationic polymers, Polyquaternium-7 and Polyquaternium-11, and the natural anionic polymer, gum of acacia, on the rheology and microstructure of creams prepared with a non-ionic mixed emulsifier (cetyl stearyl alcohol-12EO/cetyl alcohol) using rheology (continuous shear, and viscoelastic creep and oscillation), microscopy and differential scanning calorimetry (DSC). A control cream containing no polymer was also investigated. The semisolid control cream was structured by a swollen lamellar gel network phase formed from the interaction of cetyl alcohol and the POE surfactant, in excess of that required to stabilize oil droplets, with continuous phase water. Endothermic transitions between 25 and 100 degrees C were identified as components of this phase. Incorporation of cationic polymer into the formulation caused significant loss of structure to produce a mobile semisolid containing larger oil droplets. The microscopical and thermal data implied that the cationic polymer caused the swollen lamellar gel network phase to transform into non-swollen crystals of cetyl alcohol. In contrast, incorporation of gum of acacia produced a thicker cream than the control, with smaller droplet sizes and little evidence of the gel network. Microscopical and thermal data implied that although there were also interactions between gum of acacia and both the surfactant and the swollen gel network phase, the semisolid properties were probably because of the ability of the gum of acacia to stabilize and thicken the emulsion in the absence of the swollen lamellar network.
Collapse
Affiliation(s)
- H M Ribeiro
- Faculdade de Farmácia da Universidade de Lisboa, Av.das Forças Armadas, 1600 Lisboa, Portugal.
| | | | | |
Collapse
|
27
|
|
28
|
Cabral F, Ribeiro HM, Hilário L, Machado L, Vasconcelos E. Use of pulp mill inorganic wastes as alternative liming materials. Bioresour Technol 2008; 99:8294-8298. [PMID: 18406609 DOI: 10.1016/j.biortech.2008.03.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2007] [Revised: 02/28/2008] [Accepted: 03/02/2008] [Indexed: 05/26/2023]
Abstract
A laboratory aerobic incubation study was performed during 18 weeks under controlled conditions to assess the effects of applying different doses of pulp mill inorganic wastes on the physical-chemical properties of an acid Dystric Cambissol. Three different inorganic wastes were tested - wood ash, dregs and grits, and an agriculture limestone was used as reference. Results showed that increasing the dose applied of the different inorganic wastes tested always led to significant raises of soil pH at different incubation times demonstrating that its use as alternative-liming materials could be a valid and less expensive option to the use of commercial agricultural limestone. Moreover, no immediate concerns seem to be expected related to soil exchangeable sodium (Na) content, at least for the doses needed to increase soil pH until the targeted value 6.5. Particularly for wood ash a pronounced increase on soil extractable potassium and phosphorous was observed, indicating that besides the liming effect this waste can contribute to improve soil fertility by supplying significant available amounts of these nutrients. Finally, metals do not seem to be a limiting factor for the application to land of these by-products.
Collapse
Affiliation(s)
- F Cabral
- UIQA, Instituto Superior de Agronomia, TU Lisbon, Tapada da Ajuda, 1349-017 Lisboa, Portugal.
| | | | | | | | | |
Collapse
|
29
|
Ribeiro HM, Romero AM, Pereira H, Borges P, Cabral F, Vasconcelos E. Evaluation of a compost obtained from forestry wastes and solid phase of pig slurry as a substrate for seedlings production. Bioresour Technol 2007; 98:3294-7. [PMID: 16919933 DOI: 10.1016/j.biortech.2006.07.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
A composted material obtained from forestry wastes and solid phase of pig slurry was evaluated as a substrate component for the production of tomato and lettuce seedlings. Four different substrates were tested: compost (100C), a mixture of 75% compost and 25% peat substrate (75C), a mixture of 50% compost and 50% peat substrate (50C), and peat-based substrate (control). Compost increased the pH of the substrate from 6.3 (control) to 6.9 (100C) but did not affect the electrical conductivity (0.26 and 0.27 mScm(-1), respectively, for control and 100C). Germination and growth of lettuce seedlings were not affected by the substrate type, contrasting with tomato seedlings where the highest growth occurred at 100C substrate. Increasing compost percentage on substrate increased nitrogen, calcium and magnesium availability and, consequently, the concentration of these elements in plant tissues increased. On the contrary, potassium and manganese concentration decreased. Results from the study suggest that the compost studied is a good alternative to peat-based substrates for the production of vegetable seedlings.
Collapse
Affiliation(s)
- H M Ribeiro
- Instituto Superior de Agronomia, DQAA, Tapada da Ajuda 1349-017, Lisboa, Portugal
| | | | | | | | | | | |
Collapse
|
30
|
Cunha-Queda AC, Ribeiro HM, Ramos A, Cabral F. Study of biochemical and microbiological parameters during composting of pine and eucalyptus bark. Bioresour Technol 2007; 98:3213-20. [PMID: 16905314 DOI: 10.1016/j.biortech.2006.07.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
To study the possibility of some residues from pulp and paper industry being used as substrates to produce seedlings in containers, three composting experiments were carried out using eucalyptus bark, pine bark and a mixture (60:40, v:v) of pine bark+eucalyptus bark. Biochemical parameters studied were: acid and alkaline phosphatases, lipase (C10), protease, urease, beta-glucosidase and total cellulases. The microbiological populations of total aerobic bacteria, total fungi, actinomycetes, nitrifying bacteria, cellulolytic bacteria and fungi were also evaluated. At the end of the process physicochemical characterization of composts was also performed. Results showed in general that the highest microbiological populations as well as for enzymatic activities occurred during the thermophilic phase (>40 degrees C) of the process. On the other hand and according to the physicochemical characteristics of composts pine bark is the most appropriate material to be used in the formulation of substrates to produce plants in containers.
Collapse
Affiliation(s)
- A C Cunha-Queda
- Departamento de Química Agrícola e Ambiental, Instituto Superior de Agronomia, Tapada da Ajuda 1349-017, Lisboa, Portugal.
| | | | | | | |
Collapse
|
31
|
Pérez LF, Ribeiro HM, Casal JA, Pinto RA, Sá Miranda MC, Tutor JC. Thermodynamic characterisation of the mutated isoenzyme A of beta-N-acetylhexosaminidase in GM2-gangliosidosis B1 variant. Clin Chim Acta 1999; 285:45-51. [PMID: 10481922 DOI: 10.1016/s0009-8981(99)00086-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [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: 11/17/2022]
Abstract
Here we report the determination of the activation energies of the plasma isoenzymes of beta-N-acetylhexosaminidase (Hex, EC 3.2.1.52), isolated by chromatography in DEAE-cellulose, using the neutral chromogenic substrate 3,3'dichlorophenylsulfonphthaleinyl-N-acetyl-beta-D-glucosaminide. The activation energy of mutated Hex A isoenzyme (Ea approximately 71.5 kJ/mol) from a patient with GM2-gangliosidosis B1 variant, homozygote for the G533-->A (Arg178His) mutation, was significantly higher than that of normal Hex A (Ea approximately 41.8 kJ/mol) and analogous to that of Hex B isoenzyme (Ea approximately 75.1 kJ/mol). The determination of this thermodynamic variable of Hex in different biological specimens could allow for a straightforward biochemical characterisation of the GM2-gangliosidosis B1 variant.
Collapse
Affiliation(s)
- L F Pérez
- Laboratorio Central, Hospital General de Galicia-Clinico Universitario, Santiago de Compostela, Spain
| | | | | | | | | | | |
Collapse
|
32
|
Pérez LF, Martínez MI, Ribeiro HM, Pinto RA, Miranda MC, Tutor JC. Characterization of the isoenzyme profile of beta-N-acetylhexosaminidase in the urine of newborns. Clin Chem Lab Med 1999; 37:765-9. [PMID: 10510735 DOI: 10.1515/cclm.1999.117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 11/15/2022]
Abstract
The urinary isoenzymes of beta-N-acetylhexosaminidase (Hex) in newborn infants were characterised by chromatography, electrophoresis, thermodynamic analysis and through substrate specificity. No qualitative difference was found for the major Hex A and Hex B isoenzymes between full-term or premature newborns and adults, although in the latter group the relative proportion of Hex B is much lower (18.5 +/- 2.7% vs. 36.3 +/- 1.0%). An additional minor enzyme form was found in some premature newborns, which eluted from the DEAE-cellulose column at a higher concentration of NaCl than Hex A and, like this isoenzyme, is able to hydrolyse 4-methylumbellipheryl-2-acetamido-2-deoxy-beta-D-glucopyranoside-6 -sulphate, which would suggest that it has alpha subunits in its molecule. These results do not confirm the hypothesis of other authors about the existence of a unique fetal Hex isoenzyme in neonatal urine which eluted before the application of the NaCl gradient, similarly to the Hex B.
Collapse
Affiliation(s)
- L F Pérez
- Laboratorio Central, Hospital General de Galicia-Clínico Universitario, Santiago de Compostela, Spain
| | | | | | | | | | | |
Collapse
|