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De Marchi JGB, Cé R, Onzi G, Alves ACS, Santarém N, Cordeiro da Silva A, Pohlmann AR, Guterres SS, Ribeiro AJ. IgG functionalized polymeric nanoparticles for oral insulin administration. Int J Pharm 2022; 622:121829. [PMID: 35580686 DOI: 10.1016/j.ijpharm.2022.121829] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 01/31/2022] [Revised: 04/22/2022] [Accepted: 05/10/2022] [Indexed: 11/17/2022]
Abstract
The oral route is the best way to administer a drug; however, fitting peptide drugs in this route is a major challenge. In insulin cases, less than 0.5% of the administered dose achieves systemic circulation. Oral delivery by nanoparticles can increase insulin permeability across the intestinal epithelium while maintaining its structure and activity until release in the gut. This system can be improved to increase permeability across intestinal cells through active delivery. This study aimed to improve a nanoparticle formulation by promoting functionalization of its surface with immunoglobulin G to increase its absorption by intestinal epithelium. The characterization of formulations showed an adequate size and a good entrapment efficiency. Functionalized nanoparticles led to a desirable increase in insulin release time. Differential scanning calorimetry, infrared spectroscopy and paper chromatography proved the interactions of nanoparticle components. With immunoglobulin G, the nanoparticle size was slightly increased, which did not show aggregate formation. The developed functionalized nanoparticle formulation proved to be adequate to carry insulin and potentially increase its internalization by epithelial gut cells, being a promising alternative to the existing formulations for orally administered low-absorption peptides.
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Affiliation(s)
- J G B De Marchi
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS 90610-000, Brazil; Universidade de Coimbra, Faculdade de Farmácia, Coimbra, Portugal
| | - R Cé
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS 90610-000, Brazil; Departamento de Química Orgânica, Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS 90650-001, Brazil
| | - G Onzi
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS 90610-000, Brazil
| | - A C S Alves
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS 90610-000, Brazil; Departamento de Química Orgânica, Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS 90650-001, Brazil
| | - N Santarém
- Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
| | - A Cordeiro da Silva
- Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal; i(3)S, IBMC, Rua Alfredo Allen, Porto, Portugal
| | - A R Pohlmann
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS 90610-000, Brazil; Departamento de Química Orgânica, Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS 90650-001, Brazil
| | - S S Guterres
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS 90610-000, Brazil
| | - A J Ribeiro
- Universidade de Coimbra, Faculdade de Farmácia, Coimbra, Portugal; i(3)S, IBMC, Rua Alfredo Allen, Porto, Portugal.
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Durigan JLQ, Peviani SM, Russo TL, Silva ACD, Vieira RP, Martins MA, Carvalho CRF, Salvini TF. Effects of exercise training on atrophy gene expression in skeletal muscle of mice with chronic allergic lung inflammation. Braz J Med Biol Res 2009; 42:339-45. [PMID: 19330261 DOI: 10.1590/s0100-879x2009000400005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2008] [Accepted: 02/04/2009] [Indexed: 01/05/2023] Open
Abstract
We evaluated the effects of chronic allergic airway inflammation and of treadmill training (12 weeks) of low and moderate intensity on muscle fiber cross-sectional area and mRNA levels of atrogin-1 and MuRF1 in the mouse tibialis anterior muscle. Six 4-month-old male BALB/c mice (28.5 +/- 0.8 g) per group were examined: 1) control, non-sensitized and non-trained (C); 2) ovalbumin sensitized (OA, 20 microg per mouse); 3) non-sensitized and trained at 50% maximum speed _ low intensity (PT50%); 4) non-sensitized and trained at 75% maximum speed _ moderate intensity (PT75%); 5) OA-sensitized and trained at 50% (OA+PT50%), 6) OA-sensitized and trained at 75% (OA+PT75%). There was no difference in muscle fiber cross-sectional area among groups and no difference in atrogin-1 and MuRF1 expression between C and OA groups. All exercised groups showed significantly decreased expression of atrogin-1 compared to C (1.01 +/- 0.2-fold): PT50% = 0.71 +/- 0.12-fold; OA+PT50% = 0.74 +/- 0.03-fold; PT75% = 0.71 +/- 0.09-fold; OA+PT75% = 0.74 +/- 0.09-fold. Similarly significant results were obtained regarding MuRF1 gene expression compared to C (1.01 +/- 0.23-fold): PT50% = 0.53 +/- 0.20-fold; OA+PT50% = 0.55 +/- 0.11-fold; PT75% = 0.35 +/- 0.15-fold; OA+PT75% = 0.37 +/- 0.08-fold. A short period of OA did not induce skeletal muscle atrophy in the mouse tibialis anterior muscle and aerobic training at low and moderate intensity negatively regulates the atrophy pathway in skeletal muscle of healthy mice or mice with allergic lung inflammation.
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Affiliation(s)
- J L Q Durigan
- Departamento de Fisioterapia, Universidade Federal de São Carlos, São Carlos, SP, Brasil
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Ouaïssi M, Cabral S, Tavares J, da Silva AC, Mathieu Daude F, Mas E, Bernard J, Sastre B, Lombardo D, Ouaissi A. Histone deacetylase (HDAC) encoding gene expression in pancreatic cancer cell lines and cell sensitivity to HDAC inhibitors. Cancer Biol Ther 2008; 7:523-31. [PMID: 18296916 DOI: 10.4161/cbt.7.4.5480] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
PURPOSE Multiple biochemical and molecular alterations occur in pancreatic cancer cells. In the present study, attempts were made for the first time, to explore the level of expression of members of histone deacetylase encoding genes (HDACs) in four pancreatic tumor cell lines: Panc-1, BxPC-3, SOJ-6 and MiaPaCa-2; and two non-related tumor cells: Jurkat and HeLa. Furthermore, we examined the possible relationship between the levels of HDACs expression and the sensitivity/resistance to HDAC inhibitors (TSA, Nicotinamide and Sirtinol). RESULTS We have found that although a slight variation in the profiles of gene expression among cell lines could be evidenced, HDACs protein synthesis seem to be similar. Furthermore, the cells were equally sensitive to inhibition by Sirtinol whereas some variation in the IC(50) could be seen in the case of TSA. We also demonstrate that the drugs had the capacity to induce the death of cells by apoptosis. METHODS We have used four human pancreatic tumor cell lines and two-non related tumor cells, to evaluate the expression of HDAC encoding genes by RT-PCR and Western blot analysis. We also measured the effect of certain HDAC inhibitors (HDIs) on cell growth, cell cycle alteration, membrane phosphatidyl-serine exposure, DNA fragmentation and mitochondrial membrane potential loss. CONCLUSIONS Taken together, our data support the notion that the level of cell sensitivity to the HDIs might be related to the level of expression of genes such as those encoding proteins playing a role in cell cycle checkpoints control but not HDAC per se.
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Affiliation(s)
- M Ouaïssi
- Service de chirurgie Digestive et Oncologique, Hôpital Timone, Marseille, France
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Sereno D, Cordeiro da Silva A, Mathieu-Daude F, Ouaissi A. Advances and perspectives in Leishmania cell based drug-screening procedures. Parasitol Int 2006; 56:3-7. [PMID: 17079188 DOI: 10.1016/j.parint.2006.09.001] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.6] [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: 06/15/2006] [Revised: 09/18/2006] [Accepted: 09/20/2006] [Indexed: 11/18/2022]
Abstract
Efforts for the development of new therapeutics, essential for the control of leishmaniasis rely mainly on screening of potentially effective compounds in pathogen growth/multiplication assays, both in vitro and in vivo. Screenings designed to closely reflect the situation in vivo are currently labor-intensive and expensive, since they require intracellular amastigotes and animal models. Screenings designed to facilitate rapid testing of a large number of drugs are not performed on the clinically relevant parasite stage, but the promastigotes. The ability to select transgenic Leishmania expressing reporter proteins, such as the green fluorescent protein (GFP) or the luciferase, opened up new possibilities for the development of drug screening tests. In this review we will focus on available methodologies for direct drug screening purposes against the mammalian stage of the parasite, with emphasis on the future developments that could improve sensitivity, reliability, versatility and the throughput of the intracellular model screening.
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Affiliation(s)
- D Sereno
- IRD, UR008 Pathogénie des Trypanosomatidés, 911 Avenue Agropolis, BP 64501, 34394 Montpellier Cedex 5, France.
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Sereno D, Vergnes B, Mathieu-Daude F, Cordeiro da Silva A, Ouaissi A. Looking for putative functions of the Leishmania cytosolic SIR2 deacetylase. Parasitol Res 2006; 100:1-9. [PMID: 17048004 DOI: 10.1007/s00436-006-0280-2] [Citation(s) in RCA: 10] [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] [Subscribe] [Scholar Register] [Received: 06/13/2006] [Accepted: 07/05/2006] [Indexed: 10/24/2022]
Abstract
During the past few years, the silent information regulator SIR2 protein family has attracted great interest due to its implication in an organism's life span extension. They bear diverse subcellular localization and play a role in transcriptional silencing and DNA repair. The biochemical reaction catalysed by these enzymes (nicotinamide adenine dinucleotide-dependant deacetylase/adenosine diphosphate-ribosyl transferase) is supposed to be linked to metabolism. Members of this protein family were described in parasitic organisms, but little information is available on potential functions of such enzymes in these organisms. In this article, we review recent information on structure and peculiar functions of SIR2s in eukaryotes, with emphasis on parasitic protozoa, particularly the Trypanosomatidae. Through the enzyme localization and the diverse substrates and by-products of the enzymatic reactions, we approach the potential pathways in which the Leishmania cytosolic SIR2 protein can be involved.
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Affiliation(s)
- D Sereno
- UR008 Pathogénie des Trypanosomatidés, 911 Avenue Agropolis, BP 64501, 34394, Montpellier Cedex 5, France.
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Souza RLR, Furtado L, Diniz ACP, Silva ACD, Kaiss J, Petzl-Erler ML, Chautard-Freire-Maia EA. Studies on a heterologous complex formed by human butyrylcholinesterase. Biochem Genet 2003; 41:141-50. [PMID: 12834044 DOI: 10.1023/a:1023373526230] [Citation(s) in RCA: 8] [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: 11/12/2022]
Abstract
An electrophoretic band with butyrylcholinesterase activity was detected in 71 CHE2 C5+ and 378 CHE2 C5- individuals and was named C4/5 in view of its similar mobility to either C4 or C5, depending on the pH of the agar gel used. The present data suggest that C4/5 is a heterologous complex of butyrylcholinesterase. Although the C4/5 band may have the same mobility as C5, depending on the conditions of electrophoresis, our hypothesis is that these two bands result from the association of BChE with different molecules.
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Affiliation(s)
- R L R Souza
- Department of Genetics, Federal University of Paraná, PO Box 19071, 81531-990 Curitiba, PR, Brazil
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Cordeiro da Silva A, Lima EC, Vicentelli MH, Minoprio P. V beta 6-bearing T cells are involved in resistance to Trypanosoma cruzi infection in XID mice. Int Immunol 1996; 8:1213-9. [PMID: 8918690 DOI: 10.1093/intimm/8.8.1213] [Citation(s) in RCA: 11] [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: 02/03/2023] Open
Abstract
BALB.xid mice, carrying an X-linked mutation leading to the absence of CD5+ B cells, are highly resistant to Trypanosoma cruzi infection. These mice clear blood parasites in the acute phase of infection and do not develop the inflammatory infiltration characteristically observed in the chronic phase of susceptible strains of mice. We have shown that the resistance of BALB.xid is dependent on the production of high levels of IFN-gamma. Natural (adoptive foster) or artificial (in vivo injection of blocking antibodies) treatments of BALB.xid induced deletion of CD4+ and CD8+ cells bearing V beta 6 TCR. The absence of V beta 6 lymphocytes considerably reduced resistance to infection. Furthermore, in BALB.xid lacking this minor fraction of the T cell repertoire, almost 50% of the IFN-gamma production is lost. This indicates that V beta 6-bearing T cells are either directly or indirectly involved in the production of IFN-gamma and, thus, important for an effective immune response during the acute phase of experimental Chagas' disease.
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Affiliation(s)
- A Cordeiro da Silva
- Unité d'Immunoparasitologie, CNRS, URA 1960, Département d'Immunologie, Institut Pasteur, Paris, France
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