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Suárez LM, Hoyos L, Castellote-Borrell M, Guasch J, Orozco VH, Giraldo LF. pH-Sensitive Acrylic Terpolymers for the Coating of Orally Administered Drugs Used for Colonic Release. ACS OMEGA 2024; 9:204-214. [PMID: 38222599 PMCID: PMC10785650 DOI: 10.1021/acsomega.3c03437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 11/17/2023] [Accepted: 12/07/2023] [Indexed: 01/16/2024]
Abstract
Polymeric coatings are a promising option for the development of delivery systems for orally administered drugs. However, the gastrointestinal conditions to which they are subjected, which include low pH and solubility as well as peristaltic movements, can limit their applications. In this work, different formulations of polymeric coatings were produced using pH-sensitive materials consisting of copolymers of methyl acrylate, methyl methacrylate, and methacrylic acid. The polymers were synthesized by the emulsion polymerization technique, obtaining small average particle sizes (56-190 nm), molecular weights between 200,000 and 400,000 g/mol, and a glass transition temperature above 35 °C, which are suitable for film formation at room temperature. Thus, they were assessed as coatings for hydroxypropyl methylcellulose capsules (HPMC) using the immersion method, showing adequate capacity to protect the capsule at gastric pH (pH 1.2) and dissolve at the simulated intestinal pH (pH= 7.2). In particular, the higher the content of the acidic monomer, the higher the release time of the test molecule contained in the acrylic terpolymer-coated HPMC capsules proposed, which was a curcuminoid derivative due to their bright color and potential medical benefits. In addition, a minimum number of immersions was required for coating the HPMC capsules at high acidic concentrations, which further facilitates the delayed release needed for colonic treatment. However, too high proportions of methacrylic acid may result in cytotoxicity issues. Consequently, a biocompatible formulation containing a proportion of methyl acrylate, methyl methacrylate, and methacrylic acid of 7:3:3 is proposed as the most adequate for colonic release. Thus, by chemically modulating the molar percentages of the acrylic monomers, it was possible to obtain tailored acrylic terpolymer coatings with different characteristics and desired properties in order to modulate the release kinetics of an active substance in a colonic environment.
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Affiliation(s)
- Lina M. Suárez
- Laboratorio
de Investigación en Polímeros, Instituto de Química, Universidad de Antioquia, Medellín 050010, Colombia
- Dynamic
Biomimetics for Cancer Immunotherapy, ICMAB-CSIC, Campus UAB, Bellaterra 08193, Spain
| | - Lina Hoyos
- Grupo
de Investigación de Biología de Sistemas, Escuela de
Ciencias de la Salud, Universidad Pontificia
Bolivariana, Medellín 050031, Colombia
| | - Miquel Castellote-Borrell
- Institute
of Materials Science of Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra 08193, Spain
- Dynamic
Biomimetics for Cancer Immunotherapy, ICMAB-CSIC, Campus UAB, Bellaterra 08193, Spain
| | - Judith Guasch
- Institute
of Materials Science of Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra 08193, Spain
- Dynamic
Biomimetics for Cancer Immunotherapy, ICMAB-CSIC, Campus UAB, Bellaterra 08193, Spain
- Centro
de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Madrid 28029, Spain
| | - Víctor H. Orozco
- Laboratorio
de Investigación en Polímeros, Instituto de Química, Universidad de Antioquia, Medellín 050010, Colombia
| | - Luis F. Giraldo
- Laboratorio
de Investigación en Polímeros, Instituto de Química, Universidad de Antioquia, Medellín 050010, Colombia
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Holkem AT, Robichaud V, Favaro-Trindade CS, Lacroix M. Chemopreventive Properties of Extracts Obtained from Blueberry ( Vaccinium myrtillus L.) and Jabuticaba ( Myrciaria cauliflora Berg.) in Combination with Probiotics. Nutr Cancer 2020; 73:671-685. [PMID: 32412316 DOI: 10.1080/01635581.2020.1761986] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The association of probiotics and fruit extracts may influence the chemopreventive effect of colorectal cancer. In this context, antiproliferative activity was evaluated to select the best extracts that would be added probiotics, after addition of Bifidobacterium or Lactobacillus in the extracts the antiradical and antioxidant activity, quinone reductase (QR) assay and apoptosis assay were evaluated. Four extracts were isolated: E1: rich in total phenolic compounds; E2: rich in water-soluble phenolic compounds; E3: rich in most apolar phenolic compounds and E4: rich in anthocyanins. The antiproliferative results showed that the best extracts for blueberry and jabuticaba were, respectively the extract E4 and E2. After addition of the probiotic bacteria in these best extracts, it was observed that E2 from jabuticaba presented significantly higher antiradical and antioxidant activity values compared to E4 from blueberry before and after addition of probiotics. There was also a 9-fold increase in activity of QR by the E2 from jabuticaba with Lactobacillus (JL). Likewise, this same extract showed a significant increase both in apoptotic and necrotic cells for both cells. In conclusion, extract rich in water-soluble phenolic compounds (E2) from jabuticaba presented a greater chemopreventive effect compared to the others.
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Affiliation(s)
- Augusto Tasch Holkem
- Research Laboratory in Sciences, Applied to Food, INRS Armand-Frappier Health and Biotechnology Centre, Canadian Irradiation Centre, Institute of Nutrition and Functional Foods (INAF), Laval, Quebec, Canada.,Universidade de São Paulo, Faculdade de Zootecnia e Engenharia de Alimentos, Departamento de Engenharia de Alimentos, Pirassununga, SP, Brazil
| | - Valérie Robichaud
- Research Laboratory in Sciences, Applied to Food, INRS Armand-Frappier Health and Biotechnology Centre, Canadian Irradiation Centre, Institute of Nutrition and Functional Foods (INAF), Laval, Quebec, Canada
| | - Carmen Silvia Favaro-Trindade
- Universidade de São Paulo, Faculdade de Zootecnia e Engenharia de Alimentos, Departamento de Engenharia de Alimentos, Pirassununga, SP, Brazil
| | - Monique Lacroix
- Research Laboratory in Sciences, Applied to Food, INRS Armand-Frappier Health and Biotechnology Centre, Canadian Irradiation Centre, Institute of Nutrition and Functional Foods (INAF), Laval, Quebec, Canada
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Induction of growth cessation by acacetin via β-catenin pathway and apoptosis by apoptosis inducing factor activation in colorectal carcinoma cells. Mol Biol Rep 2019; 47:987-1001. [PMID: 31734898 DOI: 10.1007/s11033-019-05191-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 11/12/2019] [Indexed: 12/18/2022]
Abstract
Acacetin, a bioflavanoid, contains anti-inflammatory and anti-cancer activities as shown in different experimental models. However, its anticancer potential and mechanism of action against colorectal cancer cells is largely unknown. Here, we have investigated the efficacy of acacetin using two colorectal adenocarcinoma SW480 and HCT-116 cell lines. Cell survival was examined by Trypan-blue exclusion and MTT assays, cell cycle analysis by FACS, apoptosis was assessed using Annexin V FITC assay and nuclear condensation by Hoechst staining, ROS level by DCFDA and Mitosox, and protein expression level by Western blotting. Acacetin reduced the cell survival and proliferation of both types of cells, and induced S- and G2-M phase arrest and also reduced the levels of β-catenin and its downstream target c-myc. Further, acacetin induced apoptosis as examined by Annexin-V FITC and nuclear condensation. It increased intracellular ROS production, especially mitochondrial ROS. Acacetin increased mitochondrial membrane potential depolarization and Bax:Bcl-2 ratio. Although significant changes in caspases -8 and -9 and PARP level was not observed, acacetin could induce the truncation and subsequent translocation of activated AIF from mitochondria to cytosol, which could further induce chromosomal breakage leading to apoptosis. In conclusion, Acacetin induces mitochondrial ROS-mediated cell death in a caspase-independent manner in SW480 and HCT-116 colon carcinoma cells by inducing apoptosis inducing factor (AIF), which may potentiate its anticancer and chemotherapeutic prospects against colorectal carcinoma.
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Empl MT, Cai H, Wang S, Junginger J, Kostka T, Hewicker-Trautwein M, Brown K, Gescher AJ, Steinberg P. Effects of a Grapevine Shoot Extract Containing Resveratrol and Resveratrol Oligomers on Intestinal Adenoma Development in Mice: In Vitro and In Vivo Studies. Mol Nutr Food Res 2018; 62. [PMID: 29125219 DOI: 10.1002/mnfr.201700450] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 10/10/2017] [Indexed: 11/06/2022]
Abstract
SCOPE Evidence suggests that the dietary consumption of plant extracts containing polyphenols might help prevent the onset of cancers of the gastrointestinal tract. In the present study, the chemopreventive and antiproliferative efficacy of a grapevine shoot extract (Vineatrol®30) containing resveratrol and resveratrol oligomers is investigated in vivo and in vitro. METHODS AND RESULTS The in vivo study is performed using ApcMin mice on a high-fat diet, which represents a model of human adenomatous polyposis, while the potential of the extract as well as some of its isolated constituents to inhibit intestinal adenoma cell proliferation in vitro is investigated using APC10.1 cells derived from an ApcMin mouse. Vineatrol®30 at a low (2.3 mg kg-1 diet) or high dose (476 mg kg-1 diet) reduces the adenoma number in male and adenoma volume in female animals. Furthermore, Vineatrol®30 as well as resveratrol and two resveratrol tetramers compromise the expansion of APC10.1 cells by reducing cell number, inducing cell cycle arrest, cellular senescence, and apoptosis. However, except for the extract, none of the isolated resveratrol oligomers is more efficacious than resveratrol in these cells. CONCLUSION Vineatrol®30 may merit further investigation as a potential dietary gastrointestinal cancer chemopreventive agent in humans.
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Affiliation(s)
- Michael T Empl
- Institute for Food Toxicology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Hong Cai
- Department of Cancer Studies, Leicester Royal Infirmary, University of Leicester, Leicester, United Kingdom
| | - Shan Wang
- Institute for Food Toxicology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Johannes Junginger
- Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Tina Kostka
- Institute for Food Toxicology, University of Veterinary Medicine Hannover, Hannover, Germany
| | | | - Karen Brown
- Department of Cancer Studies, Leicester Royal Infirmary, University of Leicester, Leicester, United Kingdom
| | - Andreas J Gescher
- Department of Cancer Studies, Leicester Royal Infirmary, University of Leicester, Leicester, United Kingdom
| | - Pablo Steinberg
- Institute for Food Toxicology, University of Veterinary Medicine Hannover, Hannover, Germany
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