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Gerde M, Alvarez R, Heer C, Ortega J, Fregonese R, Turri F, Di Nucci G, Beccar Varela H, Faisal J, Balparda J, Diaz Verdecchia E, Malone S, De Marco T, Minces Rizo S, Pierro P, Iglesias M, Beruti E. P-068: APS and pregnancy: Is history of stillbirth associated with worse obstetric outcomes? Thromb Res 2017. [DOI: 10.1016/s0049-3848(17)30166-4] [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: 10/20/2022]
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Piccionello AP, Pierro P, Accardo A, Buscemi S, Pace A. Concise asymmetric synthesis of Linezolid through catalyzed Henry reaction. RSC Adv 2013. [DOI: 10.1039/c3ra45186k] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Pierro P, Lorenzini P, Trotta MP, Sette P, Giancola ML, Orchi N, Giulianelli M, De Longis P, Visco-Comandini U, Antinori A, Zaccarelli M. Factors correlated to non-adherence to antiretroviral therapy among immigrants from poor resource countries, attending a reference center in Rome. J Int AIDS Soc 2008. [DOI: 10.1186/1758-2652-11-s1-p169] [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: 11/10/2022] Open
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Ammassari A, Trotta MP, Marconi P, Zaccarelli M, Sette P, Giancola ML, Pierro P, Mosti S, Acinapura RA, Antinori A. Relationship between different types of non-adherence behaviour and virological response in unselected HIV-positive cohort. J Int AIDS Soc 2008. [DOI: 10.1186/1758-2652-11-s1-p166] [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: 11/10/2022] Open
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Pitarresi G, Pierro P, Tripodo G, Mandracchia D, Giammona G. Drug delivery from mucoadhesive disks based on a photo-cross-linkable polyaspartamide derivative. J Drug Deliv Sci Technol 2005. [DOI: 10.1016/s1773-2247(05)50068-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Pitarresi G, Pierro P, Giammona G, Iemma F, Muzzalupo R, Picci N. Drug release from α,β-poly(N-2-hydroxyethyl)-dl-aspartamide-based microparticles. Biomaterials 2004; 25:4333-43. [PMID: 15046924 DOI: 10.1016/j.biomaterials.2003.11.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [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: 08/07/2003] [Accepted: 11/11/2003] [Indexed: 11/29/2022]
Abstract
Spherical pH-sensitive microparticles have been prepared by reverse phase suspension polymerization technique. Starting polymer has been alpha,beta-poly(N-2-hydroxyethyl)-DL-aspartamide (PHEA) partially derivatized with glycidylmethacrylate (GMA). PHEA-GMA copolymer (PHG) has been crosslinked in the presence of acrylic acid (AA) or methacrylic acid (MA) at various concentration. The obtained microparticles have been characterized by FT-IR spectrophotometry, particle size distribution analysis and scanning electron microscopy. In order to have information about water affinity of the prepared samples, swelling measurements have been carried out in aqueous media which simulate some biological fluids. The possibility to employ the prepared samples as pH-sensitive microparticles has been investigated by performing in vitro release studies. Experimental data have showed that the release rate from these microparticles depends on the environmental pH and the chemical structure of the drug.
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Affiliation(s)
- G Pitarresi
- Dipartimento di Chimica e Tecnologie Farmaceutiche, Università di Palermo, Via Archirafi 32, Palermo 90123, Italy.
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Pitarresi G, Pierro P, Giammona G, Muzzalupo R, Trombino S, Picci N. Beads of acryloylated polyaminoacidic matrices containing 5-Fluorouracil for drug delivery. Drug Deliv 2002; 9:97-104. [PMID: 12055037 DOI: 10.1080/10426500290095502] [Citation(s) in RCA: 10] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
Abstract
Spherical polymeric microparticles have been prepared by a reverse phase suspension polymerization technique. The starting polymer was alpha,beta-poly(N-2-hydroxyethyl)-DL-aspartamide (PHEA), partially derivatized with glycidylmethacrylate (GMA). PHEA-GMA copolymer (PHG) was crosslinked in the presence of N,N'-dimethylacrylamide (DMAA) or N,N'-ethylenebisacrylamide (EBA). 5-fluorouracil was incorporated into PHG-DMAA or PHG-EBA beads both during and after the crosslinking process. Swelling studies revealed a high affinity toward aqueous medium, influenced by the presence of 5-fluorouracil. The in vitro release study showed that the release rate depends on the chemical structure of the beads and the procedure adopted to incorporate 5-fluorouracil into the microparticles.
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Affiliation(s)
- G Pitarresi
- Dipartimento di Chimica e Tecnologie Farmaceutiche, Università di Palermo, Palermo, Italy
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Aiello R, Cavallaro G, Giammona G, Pasqua L, Pierro P, Testa F. Mesoporous silicate as matrix for drug delivery systems of non-steroidal antinflammatory drugs. Studies in Surface Science and Catalysis 2002. [DOI: 10.1016/s0167-2991(02)80276-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Caballero C, Castañera P, Ortego F, Fontana G, Pierro P, Savona G, Rodríguez B. Effects of ajugarins and related neoclerodane diterpenoids on feeding behaviour of Leptinotarsa decemlineata and Spodoptera exigua larvae. Phytochemistry 2001; 58:249-256. [PMID: 11551547 DOI: 10.1016/s0031-9422(01)00253-9] [Citation(s) in RCA: 5] [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] [Indexed: 05/23/2023]
Abstract
Three naturally occurring ajugarins and seven semisynthetic derivatives of them, possessing different functionalities in the decalin part, together with two natural furoneoclerodane diterpenes, have been assessed as feeding behavior modifying agents of larvae of the generalist Spodoptera exigua and a specialist like Leptinotarsa decemlineata. Ajugarin I and some of its derivatives exhibited a significant antifeedant activity against larvae of S. exigua in both choice and no-choice assays. Conversely, the furoneoclerodane diterpenes only presented antifeedant activity against larvae of L. decemlineata. These results indicate that the biological action of the tested substances is strongly modulated by minimal structural variations, which are also responsible for the specificity of action.
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Affiliation(s)
- C Caballero
- Departamento de Biología de Plantas, Centro de Investigaciones Biológicas, CSIC, Velàzquez 144, E-28006 Madrid, Spain
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Pierro P, Capaccio L, Gadaleta G. The 25 kDa protein recognizing the rat curved region upstream of the origin of the L-strand replication is the rat homologue of the human mitochondrial transcription factor A. FEBS Lett 1999; 457:307-10. [PMID: 10471798 DOI: 10.1016/s0014-5793(99)01055-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Mass spectrometry matrix-assisted laser desorption ionization (MALDI) analysis and N-terminus sequencing as well as immunoblotting experiments using human and mouse antibodies have allowed us to identify the 25 kDa protein, previously isolated from rat liver using magnetic beads coated with a rat liver mitochondrial (mt) DNA region upstream of the Ori-L, as the homologue of human mt transcription factor A (mtTFA). We can therefore identify this DNA binding protein as the rat mtTFA. Furthermore, since we previously showed that the 25 kDa protein purified from rat liver was able to bind the curved mtDNA region upstream of the Ori-L as well as the curved mtDNA in the D-loop region, the results here reported lead us to state, for the first time, that mtTFA binds both the curved regions of mtDNA upstream of the two replication origins.
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Affiliation(s)
- P Pierro
- Department of Biochemistry and Molecular Biology, University of Bari, Via Orabona 4, 70125, Bari, Italy
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Atlante A, Seccia TM, Pierro P, Vulpis V, Marra E, Pirrelli A, Passarella S. ATP synthesis and export in heart left ventricle mitochondria from spontaneously hypertensive rat. Int J Mol Med 1998; 1:709-16. [PMID: 9852286 DOI: 10.3892/ijmm.1.4.709] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [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: 11/05/2022] Open
Abstract
Use was made of mitochondria isolated from heart left ventricles of either spontaneously hypertensive or age-matched Wistar-Kyoto rats used as a control to find out whether hypertrophy (5-week-old rats) or hypertrophy/hypertension (24-week-old rats) can cause change in the mechanisms by which ATP is synthesised via ATP synthase and subsequently exported via the ADP/ATP translocator outside mitochondria. To do this, photometric measurements were made of the rate of ATP appearance in the extramitochondrial phase, which occurs as a result of ADP addition to mitochondria. In mitochondria from spontaneously hypertensive rats deficit of ATP production was found dependent on changes in the KmADP and Vmax values of both the ADP/ATP translocator and the ATP synthase. The ADP/ATP translocator was found to determine the rate of ATP production outside mitochondria in all the tested samples. In an initial investigation carried out to ascertain how cell ATP deficit can be counterbalanced, an increase in both adenylate kinase and creatine kinase activities was found in both hypertrophy and hypertrophy/hypertension. A possible increase in anaerobic glycolysis was also suggested by the increased lactate dehydrogenase activity.
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Affiliation(s)
- A Atlante
- Centro di Studio sui Mitocondri e Metabolismo Energetico, CNR, Bari, Italy
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Atlante A, Passarella S, Pierro P, Di Martino C, Quagliariello E. The mechanism of proline/glutamate antiport in rat kidney mitochondria. Energy dependence and glutamate-carrier involvement. Eur J Biochem 1996; 241:171-7. [PMID: 8898903 DOI: 10.1111/j.1432-1033.1996.0171t.x] [Citation(s) in RCA: 15] [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: 02/02/2023]
Abstract
Proline/glutamate antiport in rat kidney mitochondria has been studied in terms of two different features: energy dependence and glutamate-carrier contribution to accomplish proline movement across the mitochondrial membrane. Energy dependence of the proline/glutamate antiporter in rat kidney mitochondria has been investigated by means of both spectroscopic measurements and isotopic techniques, using either normal or [14C]glutamate-loaded mitochondria. The sensitivity of the proline/glutamate antiport to the ionophores valinomycin and nigericin, under conditions in which delta psi and delta pH are selectively affected, shows that the exchange is energy dependent. Measurements of both membrane potential and proton movement across the mitochondrial membrane suggest that proline/glutamate antiport is driven by the electrochemical proton gradient via the delta psi dependent proline/glutamate translocator and delta pH-dependent glutamate/OH- carrier. Such a carrier provides for re-uptake of glutamate that has already passed out of the mitochondria in exchange with incoming proline, made possible by the existence of a separate pool of glutamate in the intermembrane space, directly shown by means of HPLC measurements.
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Affiliation(s)
- A Atlante
- Centro di Studio sui Mitocondri e Metabolismo Energetico, C. N. R., Bari, Italy
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Abstract
Proline transport in rat kidney mitochondria was investigated both by using isotopic techniques and by spectroscopic measurements, in which proline metabolism was essentially allowed to occur. Widely used criteria for demonstrating the occurrence of carrier-mediated transport were successfully applied in both cases. Differences found in the Km and Vmax values, in pH and temperature dependence of proline transport, and in the inhibitor sensitivity demonstrate the existence of two separate translocators for proline in rat kidney mitochondria, i.e., the proline uniporter and the proline/glutamate antiporter. Efflux of glutamate via glutamate/OH- translocator following proline uptake by mitochondria was experimentally ruled out. Discussion is also made of the possible role of such translocators in proline metabolism and in the putative proline/glutamate shuttle.
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Affiliation(s)
- A Atlante
- Centro di Studio sui Mitocondri e Metabolismo Energetico-CNR, Bari, Italy
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