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Carta A, Briguglio I, Piras S, Corona P, Ibba R, Laurini E, Fermeglia M, Pricl S, Desideri N, Atzori E, La Colla P, Collu G, Delogu I, Loddo R. A combined in silico / in vitro approach unveils common molecular requirements for efficient BVDV RdRp binding of linear aromatic N-polycyclic systems. Eur J Med Chem 2016; 117:321-34. [DOI: 10.1016/j.ejmech.2016.03.080] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 03/16/2016] [Accepted: 03/25/2016] [Indexed: 12/14/2022]
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Furfaro AL, Piras S, Domenicotti C, Fenoglio D, De Luigi A, Salmona M, Moretta L, Marinari UM, Pronzato MA, Traverso N, Nitti M. Role of Nrf2, HO-1 and GSH in Neuroblastoma Cell Resistance to Bortezomib. PLoS One 2016; 11:e0152465. [PMID: 27023064 PMCID: PMC4811586 DOI: 10.1371/journal.pone.0152465] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 03/15/2016] [Indexed: 01/10/2023] Open
Abstract
The activation of Nrf2 has been demonstrated to play a crucial role in cancer cell resistance to different anticancer therapies. The inhibition of proteasome activity has been proposed as a chemosensitizing therapy but the activation of Nrf2 could reduce its efficacy. Using the highly chemoresistant neuroblastoma cells HTLA-230, here we show that the strong reduction in proteasome activity, obtained by using low concentration of bortezomib (BTZ, 2.5 nM), fails in reducing cell viability. BTZ treatment favours the binding of Nrf2 to the ARE sequences in the promoter regions of target genes such as heme oxygenase 1 (HO-1), the modulatory subunit of γ-glutamylcysteine ligase (GCLM) and the transporter for cysteine (x-CT), enabling their transcription. GSH level is also increased after BTZ treatment. The up-regulation of Nrf2 target genes is responsible for cell resistance since HO-1 silencing and GSH depletion synergistically decrease BTZ-treated cell viability. Moreover, cell exposure to all-trans-Retinoic acid (ATRA, 3 μM) reduces the binding of Nrf2 to the ARE sequences, decreases HO-1 induction and lowers GSH level increasing the efficacy of bortezomib. These data suggest the role of Nrf2, HO-1 and GSH as molecular targets to improve the efficacy of low doses of bortezomib in the treatment of malignant neuroblastoma.
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Affiliation(s)
- A. L. Furfaro
- Giannina Gaslini Institute, Via Gerolamo Gaslini 5, 16147, Genova, Italy
| | - S. Piras
- Department of Experimental Medicine, University of Genoa, Via L.B. Alberti 2, 16132, Genova, Italy
| | - C. Domenicotti
- Department of Experimental Medicine, University of Genoa, Via L.B. Alberti 2, 16132, Genova, Italy
| | - D. Fenoglio
- Center of Excellence for Biomedical Research, Department of Internal Medicine, University of Genoa, 16132, Genova, Italy
| | - A. De Luigi
- IRCCS-Istituto di Ricerche Farmacologiche “Mario Negri”, Via Giuseppe La Masa 19, 20156, Milano, Italy
| | - M. Salmona
- IRCCS-Istituto di Ricerche Farmacologiche “Mario Negri”, Via Giuseppe La Masa 19, 20156, Milano, Italy
| | - L. Moretta
- Bambino Gesù Children's Hospital, IRCCS, Piazza S. Onofrio 4, 00165, Roma, Italy
| | - U. M. Marinari
- Department of Experimental Medicine, University of Genoa, Via L.B. Alberti 2, 16132, Genova, Italy
| | - M. A. Pronzato
- Department of Experimental Medicine, University of Genoa, Via L.B. Alberti 2, 16132, Genova, Italy
| | - N. Traverso
- Department of Experimental Medicine, University of Genoa, Via L.B. Alberti 2, 16132, Genova, Italy
| | - M. Nitti
- Department of Experimental Medicine, University of Genoa, Via L.B. Alberti 2, 16132, Genova, Italy
- * E-mail:
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Briguglio I, Piras S, Corona P, Pirisi MA, Burrai L, Boatto G, Gavini E, Rassu G. Synthesis of 2-(Quinoxalin-2-ylamino-benzotriazolyl) Pentanedioic Derivatives as Potential Anti-Folate Agents. J Heterocycl Chem 2015. [DOI: 10.1002/jhet.2474] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- I. Briguglio
- Department of Chemistry and Pharmacy; University of Sassari; Via Muroni 23a 07100 Sassari Italy
| | - S. Piras
- Department of Chemistry and Pharmacy; University of Sassari; Via Muroni 23a 07100 Sassari Italy
| | - P. Corona
- Department of Chemistry and Pharmacy; University of Sassari; Via Muroni 23a 07100 Sassari Italy
| | - M. A. Pirisi
- Department of Chemistry and Pharmacy; University of Sassari; Via Muroni 23a 07100 Sassari Italy
| | - L. Burrai
- Department of Chemistry and Pharmacy; University of Sassari; Via Muroni 23a 07100 Sassari Italy
| | - G. Boatto
- Department of Chemistry and Pharmacy; University of Sassari; Via Muroni 23a 07100 Sassari Italy
| | - E. Gavini
- Department of Chemistry and Pharmacy; University of Sassari; Via Muroni 23a 07100 Sassari Italy
| | - G. Rassu
- Department of Chemistry and Pharmacy; University of Sassari; Via Muroni 23a 07100 Sassari Italy
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Briguglio I, Piras S, Corona P, Gavini E, Nieddu M, Boatto G, Carta A. Benzotriazole: An overview on its versatile biological behavior. Eur J Med Chem 2015; 97:612-48. [PMID: 25293580 PMCID: PMC7115563 DOI: 10.1016/j.ejmech.2014.09.089] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [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: 03/31/2014] [Revised: 09/25/2014] [Accepted: 09/28/2014] [Indexed: 12/13/2022]
Abstract
Discovered in late 1960, azoles are heterocyclic compounds class which constitute the largest group of available antifungal drugs. Particularly, the imidazole ring is the chemical component that confers activity to azoles. Triazoles are obtained by a slight modification of this ring and similar or improved activities as well as less adverse effects are reported for triazole derivatives. Consequently, it is not surprising that benzimidazole/benzotriazole derivatives have been found to be biologically active. Since benzimidazole has been widely investigated, this review is focused on defining the place of benzotriazole derivatives in biomedical research, highlighting their versatile biological properties, the mode of action and Structure Activity Relationship (SAR) studies for a variety of antimicrobial, antiparasitic, and even antitumor, choleretic, cholesterol-lowering agents.
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Affiliation(s)
- I Briguglio
- Department of Chemistry and Pharmacy, University of Sassari, Via Muroni 23/A, 07100 Sassari, Italy
| | - S Piras
- Department of Chemistry and Pharmacy, University of Sassari, Via Muroni 23/A, 07100 Sassari, Italy
| | - P Corona
- Department of Chemistry and Pharmacy, University of Sassari, Via Muroni 23/A, 07100 Sassari, Italy
| | - E Gavini
- Department of Chemistry and Pharmacy, University of Sassari, Via Muroni 23/A, 07100 Sassari, Italy
| | - M Nieddu
- Department of Chemistry and Pharmacy, University of Sassari, Via Muroni 23/A, 07100 Sassari, Italy
| | - G Boatto
- Department of Chemistry and Pharmacy, University of Sassari, Via Muroni 23/A, 07100 Sassari, Italy
| | - A Carta
- Department of Chemistry and Pharmacy, University of Sassari, Via Muroni 23/A, 07100 Sassari, Italy.
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Fadda P, Monduzzi M, Caboi F, Piras S, Lazzari P. Solid lipid nanoparticle preparation by a warm microemulsion based process: Influence of microemulsion microstructure. Int J Pharm 2013; 446:166-75. [DOI: 10.1016/j.ijpharm.2013.02.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Revised: 02/08/2013] [Accepted: 02/09/2013] [Indexed: 10/27/2022]
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Loi M, Piras S, Fara G, Meleddu G, Meleddu C. 88 poster: Characterization of a Tridimensional Thresholdd Segmentation for Pet Target Volume Delineation. Radiother Oncol 2010. [DOI: 10.1016/s0167-8140(15)34507-2] [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: 10/23/2022]
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Carta A, Loriga M, Piras S, Paglietti G, Ferrone M, Fermeglia M, Pricl S, La Colla P, Collu G, Sanna T, Loddo R. Synthesis and anti-picornaviridae in vitro activity of a new class of helicase inhibitors the N,N'-bis[4-(1H(2H)-benzotriazol-1(2)-yl)phenyl] alkyldicarboxamides. Med Chem 2007; 3:520-32. [PMID: 18045201 DOI: 10.2174/157340607782360308] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A series N,N'-bis[4-(1H(2H)-benzotriazol-1(2)-yl)phenyl]alkyldicarboxamides (3a-f and 5a-j) were prepared starting from their already known (1a-d) and (4a-c) or new (4d) amine parents. Because of the antiviral activity of several N-[4-(1H(2H)-benzotriazol-1(2)-yl)phenyl]alkylcarboxamides previously reported, title compounds were evaluated in vitro for cytotoxicity and antiviral activity against viruses representative of Picornaviridae, [i.e. Enterovirus Coxsackie B2 (CVB-2) and Polio (Sb-1)] and of two of the three genera of the Flaviviridae [Bovine Viral Diarrhea Virus (BVDV) and Yellow Fever Virus (YFV)]. Furthermore, because of the in silico activity against the RNA-dependent RNA-helicase of Polio 1 previously reported, title compounds were evaluated against the 3D model of the Sb-1 helicase and against the 2D model of the CVB-2 helicase. As a reference we used the antiviral and in silico activities of an imidazo counterpart of the title compounds, N,N'-bis[4-(2-benzimidazolyl)phenyl]alkyldicarboxamides (III) that other authors reported to be able to inhibit the corresponding enzyme of Hepatitis C Virus (HCV). In cell-based antiviral assays, N,N'-bis[4-(1H-benzotriazol-1-yl)phenyl]alkyldicarboxamides (3a-f) resulted completely inactive whereas the bis-5,6-dimethyl-benzotriazol-2-yl derivatives (5d-f) exhibited good activity against the Enteroviruses, (EC(50)s ranged between 7 and 11 microM against CVB-2 and 19-52 against Sb-1). Interestingly, bis-5,6-dichloro-benzotriazol-2-yl derivatives (5h-j) showed very selective activity against CVB-2 (EC(50)s = 4-11 microM) whereas they resulted completely inactive against all the other viruses screened. In general, all title compounds showed a good cytotoxicity profile in MT-4 cells. Molecular modeling investigations showed that active compounds may interact with the binding site of the Sb-1 helicase and that their free binding energy values are in agreement with their EC(50)s values.
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Affiliation(s)
- A Carta
- Dipartimento Farmaco Chimico Tossicologico, via Muroni 23/a, 07100 Sassari, Italy.
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Abstract
Quinoxaline derivatives have received much attention in recent years owing to their both biological properties and pharmaceutical applications. In this review we focus the attention on quinoxalin-2(3)-ones and quinoxalin-2,3-diones. These derivatives are particularly interesting since some of them showed antimicrobial (against several bacteria, viruses, fungi, etc), or anticancer activities. Furthermore, others are reported to be potent no-NMDA glutamate receptor antagonists, endowed with anxiolytic, deconditioning, analgesic, antispastic, antiallergic, antithrombotic activities. In this article we also report SAR studies and the most important methods of synthesis of the quinoxalin-2(3)-(di)ones.
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Affiliation(s)
- A Carta
- Dipartimento Farmaco Chimico Tossicologico, Facoltà di Farmacia, Università di Sassari, via Muroni 23/a, 07100 Sassari, Italy.
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Guerriero S, Ajossa S, Piras S, Angiolucci M, Marisa O, Melis GB. Diagnosis of paraovarian cysts using transvaginal sonography combined with CA 125 determination. Ultrasound Obstet Gynecol 2006; 28:856-8. [PMID: 17019747 DOI: 10.1002/uog.3844] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
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Guerriero S, Ajossa S, Piras S, Parodo G, Melis GB. Serial ultrasonographic evaluation of a decidualized endometrioma in pregnancy. Ultrasound Obstet Gynecol 2005; 26:304-6. [PMID: 16116569 DOI: 10.1002/uog.1986] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
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Abstract
Cholelithiasis has been reported with a variable incidence in homozygous beta-thalassaemia, the reasons for which have only partially been defined. Disease-associated factors or specific modifier genes may be implicated. We assessed the prevalence of cholelithiasis and the effect of co-inherited Gilbert's syndrome genotype on its development in 261 thalassaemia major (TM) and 35 thalassaemia intermedia (TI) patients. Cholelithiasis was found in 20.3% of TM and in 57.1% of TI patients. Its incidence was higher (P < 0.05) in patients homozygous for the (TA7) motif in the promoter of the UGT1-A1 gene, the genotype associated with Gilbert's syndrome, which seems to be a risk factor for the development of gallstones in TM and TI patients.
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Affiliation(s)
- R Galanello
- Ospedale Regionale Microcitemie, Dipartimento di Scienze Biomediche e Biotecnologie, University of Cagliari, Via Jenner s.n. 09121, Cagliari, Italy.
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Pani A, Batetta B, Putzolu M, Sanna F, Spano O, Piras S, Mulas MF, Bonatesta RR, Amat di S Filippo C, Vargiu L, Marceddu T, Sanna L, La Colla P, Dessì S. MDR1, cholesterol certification and cell growth: a comparative study in normal and multidrug-resistant KB cell lines. Cell Mol Life Sci 2000; 57:1094-102. [PMID: 10961345 DOI: 10.1007/pl00000745] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Mulas M, Batetta B, Putzolu M, Sanna F, Spano O, Piras S, Petruzzo P, Cappai A, Brotzu G, Dessì S. P11 MDR1 gene expression in normal and atherosclerotic human arteries. Atherosclerosis 1999. [DOI: 10.1016/s0021-9150(99)90158-2] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sanna F, Dessi S, Putzolu M, Mulas M, Piras S, Spano O, Batetta B. C28 Relationship between, cell growth, cholesterol esterification and MDR P-glycoprotein inhibitors. Atherosclerosis 1999. [DOI: 10.1016/s0021-9150(99)90131-4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Batetta B, Pani A, Putzolu M, Sanna F, Bonatesta R, Piras S, Spano O, Mulas MF, Dessí S. Correlation between cholesterol esterification, MDR1 gene expression and rate of cell proliferation in CEM and MOLT4 cell lines. Cell Prolif 1999. [PMID: 10371303 DOI: 10.1046/j.1365-2184.1999.3210049.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A positive correlation between cholesterol esterification and growth rate potential was previously found in our laboratory during the growth of CEM and MOLT4 lymphoblastic cells. In the current study, we investigated whether the rates of cholesterol esters synthesis correlate with changes of acyl-CoAcholesterol acyltransferase (ACAT) mRNA levels and of other genes implied in cholesterol biosynthesis and uptake, such as 3-hydroxy-3-methylglutaryl-CoA (HMGCoA) reductase and low density lipoprotein (LDL) receptor. The results showed that the more rapid growing CEM cells had lower levels of expression of HMGCoA-reductase and LDL receptors compared to MOLT4. By contrast, ACAT mRNA levels were higher in CEM cells, further supporting the concept of a possible involvement of cholesterol esters in the regulation of cell growth and division. In this study, high levels of cholesterol esterification and of expression of ACAT gene were also associated with a markedly increased expression of multidrug resistance (MDR1) gene, suggesting that MDR1 activity might contribute to regulate the rate of cell growth and division by modulating intracellular cholesterol ester levels.
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Affiliation(s)
- B Batetta
- Istituto di Patologia Sperimentale, Università degli Studi di Cagliari, Italy
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Batetta B, Pulisci D, Bonatesta RR, Sanna F, Piras S, Mulas MF, Spano O, Putzolu M, Broccia G, Dessì S. G6PD activity and gene expression in leukemic cells from G6PD-deficient subjects. Cancer Lett 1999; 140:53-8. [PMID: 10403541 DOI: 10.1016/s0304-3835(99)00052-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [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]
Abstract
In the present study we examined gene expression and glucose-6-phosphate dehydrogenase (G6PD) activity in leukemic cells isolated from G6PD normal and deficient subjects. The results have shown that G6PD activity strongly increases in G6PD normal leukemic cells as well as in G6PD deficient leukemic cells when compared to peripheral blood mononuclear cells (PBMC). Higher levels of G6PD gene expression were observed in leukemic cells from G6PD deficient patients compared to G6PD normal. A similar pattern of gene expression was also observed for 3-hydroxy-3-methylglutaryl coenzyme A (HMGCoA) reductase. These results support the hypothesis that G6PD deficient cell, in order to sustain their growth, must respond to the low activity of their mutant enzyme with an increase in quantity through an induction of gene expression.
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Affiliation(s)
- B Batetta
- Istituto di Patologia Sperimentale, Cagliari, Italy
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Batetta B, Sanna S, Bonatesta R, Mulas F, Piras S, Putzolu M, Pani A, Spano O, Dessi S. Correlation between cell proliferation, cholesterol metabolism and multidrug resistance gene expression in CEM and MOLT4 lymphoblastic cells. Atherosclerosis 1997. [DOI: 10.1016/s0021-9150(97)89968-6] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Dessi S, Sanna F, Bonatesta R, Mulas F, Putzolu M, Piras S, Spano O, Pani A, Batetta B. Growth regulation of L1210 leukemic cells: Role of cholesterol esterification. Atherosclerosis 1997. [DOI: 10.1016/s0021-9150(97)89990-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Loriga M, Piras S, Sanna P, Paglietti G. Quinoxaline chemistry. Part 7. 2-[aminobenzoates]- and 2-[aminobenzoylglutamate]-quinoxalines as classical antifolate agents. Synthesis and evaluation of in vitro anticancer, anti-HIV and antifungal activity. Farmaco 1997; 52:157-66. [PMID: 9212450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Thirty-three quinoxalines bearing an aminobenzoyl or aminobenzoylglutamate group on position 2 and various substituents on position 3,6,7 of the heterocycle were prepared in order to evaluate in vitro anticancer activity. Preliminary screening performed at NCI showed that most derivatives exhibited a moderate to strong growth inhibition activity on various tumor panel cell lines between 10(-5) and 10(-4) Molar concentrations. Interesting selectivities were also recorded between 10(-8) and 10(-6) M. Among the series examined one compound (29) which was the most active also exhibited both in vitro anti-HIV protection and antifungal activity while in other two (31, 37) the antifungal activity was prevailing.
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Affiliation(s)
- M Loriga
- Istituto di Chimica Farmaceutica, Università di Sassari
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Dessi S, Batetta B, Pani A, Spano O, Sanna F, Putzolu M, Bonatesta R, Piras S, Pani P. Role of cholesterol synthesis and esterification in the growth of CEM and MOLT4 lymphoblastic cells. Biochem J 1997; 321 ( Pt 3):603-8. [PMID: 9032443 PMCID: PMC1218112 DOI: 10.1042/bj3210603] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [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]
Abstract
CEM and MOLT4 are human T-cell lines isolated from patients with acute cell leukaemia. In culture they show important differences in cholesterol metabolism, CEM being less efficient at synthesizing cholesterol and having a lower activity of 3-hydroxy-3-methylglutaryl-CoA (HMGCoA) reductase. To investigate further the relationship between regulation of intracellular cholesterol metabolism at various steps and rate of cell growth, cholesterol synthesis, esterification and efflux were evaluated in CEM and MOLT4 cells at different times during exponential and stationary growth in vitro. It was shown that, although CEM cells have a lower rate of cholesterol synthesis, they grow at a faster rate than MOLT4 cells. However, CEM cells exhibit an increased capacity to esterify cholesterol associated with a decreased efflux of newly synthesized cholesterol into the medium. These results provide evidence for an association between the capability to synthesize and retain cell cholesterol esters and the growth rate potential.
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Affiliation(s)
- S Dessi
- Istituto di Patologia Sperimentale, Università degli Studi di Cagliari, Italy
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Piras S, Loriga M, Paglietti G, Demontis MP, Varoni MV, Fattaccio MC, Anania V. Quinoxaline chemistry. Part 6--Synthesis and evaluation of antiulcer and gastroprotective activity of 2-[arylmethylmercapto-, arylmethylsulfinyl-, piperazinyl-3-R-substituted]quinoxalines. Farmaco 1996; 51:569-77. [PMID: 8930110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Thirty compounds possessing quinoxaline structure bearing either substituted arylmethylmercapto-, arylmethylsulfinyl group or a piperazinyl moiety in position 2 were prepared in order to evaluate an antiulcer and gastroprotective activity in rat pylorus ligature, in comparison with omeprazole and ranitidine at the dose of 100 mg/kg after oral administration. Among the compounds of the first group one third showed a moderate activity being about half potent as omeprazole whereas in the second group compound 5b exibited an activity superior to that of ranitidine accompanied with the lowest incidence of lesions and mortality and another compound (5i) was equiactive as ranitidine.
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Affiliation(s)
- S Piras
- Istituto di Chimica Farmaceutica e Tossicologica dell'Università di Sassari, Muroni
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Valdès E, Borzoni F, Onnis D, Piras S, Vespa A, Varsi C. [Disseminated Pneumocystis carinii infection: clinico-pathologic findings in an AIDS patient]. Pathologica 1994; 86:659-64. [PMID: 7617399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Pneumocystis carinii pneumonia (PcP) is the most frequent cause of death in AIDS patients. Systemic diffusion of this microorganism is a rare event, mostly reported in patients receiving prophylactic aerosol therapy. The case here described is relative to a 29 years old man with AIDS, dead short by after hospital admission. Radiological and ecoscan examinations revealed structural subversion of liver and spleen, with frequent parenchymal calcification. Post mortem histological examination of lung, liver, spleen, heart, bone marrow, lymph nodes, kidney and hypophysis identified the presence of Pc, confirmed by monoclonal specified antibody immunostaining.
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Affiliation(s)
- E Valdès
- Servizio di Anatomia Patologica, Ospedale SS. Trinità, Cagliari
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Piras S, Loriga M, Paglietti G, Sparatore F, Demontis MP, Varoni MV, Fattaccio MC, Anania V. Synthesis and evaluation of gastroprotective activity of omeprazole related benzimidazole, imidazo[4,5-b]pyridine and quinoxaline 2-substituted derivatives. Farmaco 1993; 48:1249-1259. [PMID: 8259982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Twenty compounds possessing benzimidazole, imidazo[4,5-b]pyridine and quinoxaline structure bearing either a substituted arylmethylmercapto- or an arylmethylsulfinyl group in position 2 were prepared in order to evaluate an antiulcer and gastroprotective activity in rat pylorus ligature, in comparison with omeprazole at the dose of 50 mg/kg after i.m. administration. One third of these compounds showed a moderate activity, being about half potent as omeprazole.
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Affiliation(s)
- S Piras
- Istituto di Chimica Farmaceutica e'Tossicologica dell'Università di Sassari
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Loriga M, Paglietti G, Piras S, Sparatore F, Anania V, Demontis MP, Varoni MV, Fattaccio MC. Synthesis and evaluation of gastroprotective and antiulcer activity of some 2-substituted-1H-imidazo[4,5-b] pyridines and -1H-benzimidazoles. Farmaco 1992; 47:287-303. [PMID: 1503593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Several compounds possessing imidazo[4,5-b]pyridine and benzimidazole structure bearing substituents in position 2 were prepared in order to evaluate an anti-ulcer and gastroprotective activity in rat pylorus ligature, in comparison with omeprazole. Among sixteen compounds taken as representatives of the synthetised series only one (3d) showed a good activity by i.m. administration at 50 mg/kg, while by oral administration of 100 mg/kg a certain number was active and in some cases this activity was quite superior to that of omeprazole.
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Affiliation(s)
- M Loriga
- Istituto di Chimica Farmaceutica e Tossicologica, Università di Sassari
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Cioglia G, Cherchi A, Mercuro G, Lai C, Lai O, Piras S. [Duration of action of sustained-release metoprolol in effort angina pectoris]. Cardiologia 1983; 28:253-65. [PMID: 6378220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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26
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Piras S, Castagnola L. [Toward the control of viral hepatitis type B: development, efficacy and diffusion of a new anti-hepatitis vaccine]. Riv Odontoiatr Amici Brugg 1982; 1:114-8. [PMID: 6962417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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