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Koki G, Nomo A, Ghemmogne Takam C, Biangoup Nyamsi P, Epée E, Ndoye Roth PA, Bella AL. [Epidemiological and clinical profile of age-related macular degeneration in Cameroon]. J Fr Ophtalmol 2022; 45:344-351. [PMID: 35093260 DOI: 10.1016/j.jfo.2021.12.011] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 11/14/2021] [Accepted: 12/03/2021] [Indexed: 11/28/2022]
Abstract
PURPOSE To determine the epidemiological and clinical characteristics of age-related macular degeneration in patients in Yaoundé. METHODOLOGY A multicenter, analytical and cross-sectional study was carried out from March 2017 to June 2018 in four hospitals in the city of Yaoundé. Included were all consenting patients aged at least 40 years with an established diagnosis of AMD both clinically and by imaging. The data were analyzed with CSPro software version 7.0. Chi2 and Student's "t" tests in univariate mode and logistic regression in multivariate mode were used with a significance of P≤5%. RESULTS Of the 9,989 patients who were seen during the 16-month study period, 38 met our inclusion criteria - a frequency of 0.4%. The sex ratio was 0.3, and the mean age was 68±11 years. As a function of geographic origin, AMD is more common in patients from the forest and mountain areas. The systemic comorbidities associated recorded were hypertension (47.4%) and diabetes (21.1%). After optical correction, 60 of 76 eyes (78.9%) had useful visual acuity according to WHO criteria, and the rate of blindness was 9.2%. Fundus examination revealed fewer lesions than optical coherence tomography, which demonstrated miliary drusen in 57 (75%) eyes, serous drusen in 27 (35.5%), retinal atrophy in 19 (25%) and neovascularization in 3 (3.9%). The clinical forms were dominated by age-related maculopathy, found in 45 eyes (69.2%), followed by atrophic AMD in 17 (26.2%) and finally by exudative AMD in 3 (4.6%), for a total of 65 out of 76 eyes. Age was related to the risk of MLA and atrophic AMD (P≤0.05). CONCLUSION AMD is an uncommon pathology in our setting, predominant in women over the age of 60 years.
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Affiliation(s)
- G Koki
- Faculté de médecine et des sciences biomédicales de l'université de Yaoundé I, Yaoundé, Cameroun; Hôpital d'instruction, d'application et de référence des armées de Yaoundé (HIARAY), B P 12974 Yaoundé, Cameroun.
| | - A Nomo
- Faculté de médecine et des sciences biomédicales de l'université de Yaoundé I, Yaoundé, Cameroun
| | - C Ghemmogne Takam
- Faculté de médecine et des sciences biomédicales de l'université de Yaoundé I, Yaoundé, Cameroun
| | - P Biangoup Nyamsi
- Hôpital d'instruction, d'application et de référence des armées de Yaoundé (HIARAY), B P 12974 Yaoundé, Cameroun
| | - E Epée
- Faculté de médecine et des sciences biomédicales de l'université de Yaoundé I, Yaoundé, Cameroun
| | - P A Ndoye Roth
- Faculté de médecine, de pharmacie et d'odontologie de l'université Cheik Anta Diop, Dakar, Sénégal
| | - A L Bella
- Faculté de médecine et des sciences biomédicales de l'université de Yaoundé I, Yaoundé, Cameroun
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Koki G, Ngoulou W, Nomo AF, Nguefack S, Epee E, Bella AL. [Retinal manifestations of neuro-malaria or "malarial retinopathy" in Yaoundé]. J Fr Ophtalmol 2019; 42:753-761. [PMID: 31202776 DOI: 10.1016/j.jfo.2019.03.013] [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: 12/07/2018] [Revised: 03/19/2019] [Accepted: 03/20/2019] [Indexed: 11/18/2022]
Abstract
AIM Contribute to the improvement of diagnostic and prognostic approaches to treating children with neuro-malaria in Yaoundé. PATIENTS AND METHOD A prospective and analytical study carried out in 2 hospitals of Yaoundé from October 2015 to March 2016. All patients aged 3 months to 15 years hospitalized for neuro-malaria in one of the 2 hospitals benefited from a fundus examination. The variables studied were: age, sex, Glasgow or Blantyre score, fundus examination and parasitaemia. For statistical analysis, we used the software R 3.3.0, Chi2, exact of Fisher or Kolmogorov-Smirnov tests with a significance P<5%. RESULTS Out of the 178 children hospitalized during the study period, 44 had neuro-malaria (24.71%) and 26 (46 diseased eyes) among them presented retinal lesions at a frequency of 14.60%. The mean age was 5.54±3.49 years with a sex ratio of 1.09. The under 5-years-old were the most affected with 31 (70.45%) cases. The fundus lesions of 26 (59.09%) were retinal hemorrhages in 24 (54.54%), retinal whitening and vessel discoloration in 8 (18.18%) respectively. Papillary edema was associated in 4 (9.09%). Macular involvement was noted in 9 cases. These lesions were correlated with age, depth of coma, duration, and clinical course. The rate of parasitaemia did not affect their occurrence. CONCLUSION Retinal lesions are frequent and serious during neuro-malaria in our environment, especially in children under five. They must therefore be an emphasis in the systematic exam to rule it out for a better prognostic evaluation and a fast and adequate multidisciplinary management.
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MESH Headings
- Adolescent
- Cameroon/epidemiology
- Child
- Child, Preschool
- Eye Infections, Parasitic/complications
- Eye Infections, Parasitic/diagnosis
- Eye Infections, Parasitic/epidemiology
- Female
- Humans
- Infant
- Malaria/complications
- Malaria/diagnosis
- Malaria/epidemiology
- Malaria, Cerebral/complications
- Malaria, Cerebral/diagnosis
- Malaria, Cerebral/epidemiology
- Malaria, Falciparum/complications
- Malaria, Falciparum/diagnosis
- Malaria, Falciparum/epidemiology
- Male
- Plasmodium falciparum/physiology
- Prognosis
- Retinal Diseases/diagnosis
- Retinal Diseases/epidemiology
- Retinal Diseases/parasitology
- Retinal Hemorrhage/diagnosis
- Retinal Hemorrhage/epidemiology
- Retinal Hemorrhage/parasitology
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Affiliation(s)
- G Koki
- Faculté de médecine et des sciences biomédicales, université de Yaoundé I, Yaoundé, Cameroun.
| | - W Ngoulou
- Faculté de médecine et des sciences biomédicales, université de Yaoundé I, Yaoundé, Cameroun
| | - A F Nomo
- Faculté de médecine et des sciences biomédicales, université de Yaoundé I, Yaoundé, Cameroun
| | - S Nguefack
- Faculté de médecine et des sciences biomédicales, université de Yaoundé I, Yaoundé, Cameroun; Hôpital gynéco-obstétrique et pédiatrique de Yaoundé, Cameroun
| | - E Epee
- Faculté de médecine et des sciences biomédicales, université de Yaoundé I, Yaoundé, Cameroun
| | - A L Bella
- Faculté de médecine et des sciences biomédicales, université de Yaoundé I, Yaoundé, Cameroun; Hôpital gynéco-obstétrique et pédiatrique de Yaoundé, Cameroun
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Leonelli F, Trombetta A, La Bella A, Lucarelli G, Demitri N, Lamba D, Migneco LM, Marini Bettolo R. Enantioselective Synthesis and X-ray Structure of (+)((4a S
,5 S
,8a S
)-5,8a-Dimethyl-7-methyleneoctahydro-2 H
-spiro[naphthalene-1,2′-[1,3]dioxolan]-5-yl)methyl-4-iodobenzoate. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801771] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Francesca Leonelli
- Dipartimento di Biologia Ambientale; Università degli Studi di Roma “La Sapienza”; Piazzale Aldo Moro, 5 00185 Roma Italy
| | - Andrea Trombetta
- Dipartimento di Chimica; Università degli Studi di Roma “La Sapienza”; Piazzale Aldo Moro, 5 00185 Roma Italy
| | - Angela La Bella
- Dipartimento di Chimica; Università degli Studi di Roma “La Sapienza”; Piazzale Aldo Moro, 5 00185 Roma Italy
| | - Giulio Lucarelli
- Dipartimento di Chimica; Università degli Studi di Roma “La Sapienza”; Piazzale Aldo Moro, 5 00185 Roma Italy
| | - Nicola Demitri
- Elettra-Sincrotrone S.S. 14; Km 163.5 in Area Science Park 34149 Basovizza, Trieste Italy
| | - Doriano Lamba
- Istituto di CristallografiaCNR, S.S. 14; Km 163.5 in Area Science Park 34149 Basovizza, Trieste Italy
| | - Luisa Maria Migneco
- Dipartimento di Chimica; Università degli Studi di Roma “La Sapienza”; Piazzale Aldo Moro, 5 00185 Roma Italy
| | - Rinaldo Marini Bettolo
- Dipartimento di Chimica; Università degli Studi di Roma “La Sapienza”; Piazzale Aldo Moro, 5 00185 Roma Italy
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Furlotti G, Alisi MA, Cazzolla N, Ceccacci F, Garrone B, Gasperi T, La Bella A, Leonelli F, Loreto MA, Magarò G, Mangano G, Bettolo RM, Masini E, Miceli M, Migneco LM, Vitiello M. Targeting Serotonin 2A and Adrenergic α 1 Receptors for Ocular Antihypertensive Agents: Discovery of 3,4-Dihydropyrazino[1,2-b]indazol-1(2H)-one Derivatives. ChemMedChem 2018; 13:1597-1607. [PMID: 29873449 DOI: 10.1002/cmdc.201800199] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 03/28/2018] [Revised: 05/18/2018] [Indexed: 01/29/2023]
Abstract
Glaucoma affects millions of people worldwide and causes optic nerve damage and blindness. The elevation of the intraocular pressure (IOP) is the main risk factor associated with this pathology, and decreasing IOP is the key therapeutic target of current pharmacological treatments. As potential ocular hypotensive agents, we studied compounds that act on two receptors (serotonin 2A and adrenergic α1 ) linked to the regulation of aqueous humour dynamics. Herein we describe the design, synthesis, and pharmacological profiling of a series of novel bicyclic and tricyclic N2-alkyl-indazole-amide derivatives. This study identified a 3,4-dihydropyrazino[1,2-b]indazol-1(2H)-one derivative with potent serotonin 2A receptor antagonism, >100-fold selectivity over other serotonin subtype receptors, and high affinity for the α1 receptor. Moreover, upon local administration, this compound showed superior ocular hypotensive action in vivo relative to the clinically used reference compound timolol.
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Affiliation(s)
- Guido Furlotti
- Angelini RR&D (Research, Regulatory & Development), Angelini S.p.A., Piazzale della stazione snc, 00071, S. Palomba-Pomezia (Rome), Italy
| | - Maria Alessandra Alisi
- Angelini RR&D (Research, Regulatory & Development), Angelini S.p.A., Piazzale della stazione snc, 00071, S. Palomba-Pomezia (Rome), Italy
| | - Nicola Cazzolla
- Angelini RR&D (Research, Regulatory & Development), Angelini S.p.A., Piazzale della stazione snc, 00071, S. Palomba-Pomezia (Rome), Italy
| | - Francesca Ceccacci
- Chemistry Department "S. Cannizzaro", University of Rome "La Sapienza", P.le Aldo Moro 5, 00185, Rome, Italy.,Current affiliation: Istituto di Metodologie Chimiche-CNR, Unità Organizzativa di Supporto, Sede di Roma, Università degli Studi di Roma "La Sapienza", P. le Aldo Moro 5, 00185, Rome, Italy)
| | - Beatrice Garrone
- Angelini RR&D (Research, Regulatory & Development), Angelini S.p.A., Piazzale della stazione snc, 00071, S. Palomba-Pomezia (Rome), Italy
| | - Tecla Gasperi
- Department of Science, Section of Nanoscience and Nanotechnology, University of Roma Tre, via della Vasca Navale 79, 00146, Rome, Italy
| | - Angela La Bella
- Chemistry Department "S. Cannizzaro", University of Rome "La Sapienza", P.le Aldo Moro 5, 00185, Rome, Italy
| | - Francesca Leonelli
- Chemistry Department "S. Cannizzaro", University of Rome "La Sapienza", P.le Aldo Moro 5, 00185, Rome, Italy.,Dipartimento di Biologia Ambientale, University of Rome "La Sapienza", P.le Aldo Moro 5, 00185, Rome, Italy
| | - Maria Antonietta Loreto
- Chemistry Department "S. Cannizzaro", University of Rome "La Sapienza", P.le Aldo Moro 5, 00185, Rome, Italy
| | - Gabriele Magarò
- Angelini RR&D (Research, Regulatory & Development), Angelini S.p.A., Piazzale della stazione snc, 00071, S. Palomba-Pomezia (Rome), Italy
| | - Giorgina Mangano
- Angelini RR&D (Research, Regulatory & Development), Angelini S.p.A., Piazzale della stazione snc, 00071, S. Palomba-Pomezia (Rome), Italy
| | - Rinaldo Marini Bettolo
- Chemistry Department "S. Cannizzaro", University of Rome "La Sapienza", P.le Aldo Moro 5, 00185, Rome, Italy
| | - Emanuela Masini
- Departments of NEUROFARBA, Section of Pharmacology, University of Florence, Viale Pieraccini 6, 50139, Florence, Italy
| | - Martina Miceli
- Department of Science, Section of Nanoscience and Nanotechnology, University of Roma Tre, via della Vasca Navale 79, 00146, Rome, Italy
| | - Luisa Maria Migneco
- Chemistry Department "S. Cannizzaro", University of Rome "La Sapienza", P.le Aldo Moro 5, 00185, Rome, Italy
| | - Marco Vitiello
- Angelini RR&D (Research, Regulatory & Development), Angelini S.p.A., Piazzale della stazione snc, 00071, S. Palomba-Pomezia (Rome), Italy
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Koki G, Helles G, Bilong Y, Biangoup P, Aboubakar H, Epée E, Bella AL, Ebana Mvogo C. [Characteristics of post-traumatic blindness at the Yaoundé Army Training, Application and Referral Hospital]. J Fr Ophtalmol 2018; 41:540-545. [PMID: 29914763 DOI: 10.1016/j.jfo.2017.11.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 10/12/2017] [Revised: 11/11/2017] [Accepted: 11/17/2017] [Indexed: 12/09/2022]
Abstract
PURPOSE To study the characteristics of blindness after ocular trauma. METHODOLOGY In this retrospective descriptive study, we considered the files of patients who had consulted the service for ocular trauma between January 2008 and December 2014. Included were patients of both sexes and all ages whose monocular or binocular vision with best optical correction was strictly below 1/20. Statistical analysis was performed with EPI Info version 3.5.4 software, and the Chi2 test was used with statistically significant values of P≤0.05. RESULTS Over the period from 2008 to 2014, we found 100 cases of blindness (101 eyes) resulting from 591 cases of ocular trauma, for a frequency of 16.92 %. Among them, 75 men with a median age of 35.5±19.8 years. Children younger than 15 years accounted for 11 % of the series. The blindness was monocular in 99 % and binocular in 1 %, distributed as follows: 55 cases (55 %) category V, 27 (27 %) category IV and 18 (18 %) category III according to the CIM-10. In the anterior segment, cataract was responsible for category III and IV blindness, while in the posterior segment, retinal detachment was found in all categories. In all age ranges irrespective of sex, category V blindness was most frequent. CONCLUSION Blindness following ocular trauma is frequent in our context. It can be avoided. Consequently, it is essential to put in place strategies for prevention of ocular trauma via education of the population through public awareness campaigns.
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Affiliation(s)
- G Koki
- Faculté de médecine et des sciences biomédicales de Yaoundé (FMSB), route de Melen, Yaounde, Cameroun; Hôpital d'instruction, d'application et de référence des armées de Yaoundé (HIARAY), BP 12974, Yaoundé, Cameroun.
| | - G Helles
- Faculté de médecine et des sciences biomédicales de Yaoundé (FMSB), route de Melen, Yaounde, Cameroun
| | - Y Bilong
- Faculté de médecine et des sciences biomédicales de Yaoundé (FMSB), route de Melen, Yaounde, Cameroun
| | - P Biangoup
- Faculté de médecine et des sciences biomédicales de Yaoundé (FMSB), route de Melen, Yaounde, Cameroun; Hôpital d'instruction, d'application et de référence des armées de Yaoundé (HIARAY), BP 12974, Yaoundé, Cameroun
| | - H Aboubakar
- Faculté de médecine et des sciences biomédicales de Yaoundé (FMSB), route de Melen, Yaounde, Cameroun
| | - E Epée
- Faculté de médecine et des sciences biomédicales de Yaoundé (FMSB), route de Melen, Yaounde, Cameroun
| | - A L Bella
- Faculté de médecine et des sciences biomédicales de Yaoundé (FMSB), route de Melen, Yaounde, Cameroun
| | - C Ebana Mvogo
- Faculté de médecine et des sciences biomédicales de Yaoundé (FMSB), route de Melen, Yaounde, Cameroun
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Epée E, Koki G, Dohvoma VA, Kenne C, Biangoup NP, Tocke O, Mvilongo C, Bella AL, Ebana Mvogo C. [Epidemiological and clinical aspects of tropical endemic limbo-conjunctivitis in students in Yaoundé]. J Fr Ophtalmol 2016; 39:744-749. [PMID: 27765447 DOI: 10.1016/j.jfo.2016.07.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 12/31/2015] [Revised: 07/06/2016] [Accepted: 07/07/2016] [Indexed: 10/20/2022]
Abstract
INTRODUCTION TELC, tropical endemic limbo-conjunctivitis, is a keratoconjunctivitis seen more frequently in dry intertropical settings than humid ones. We aim to determine the epidemiologic and clinical profile of this condition in a city with a humid equatorial climate. PATIENTS AND METHODS During first third of 2014, we conducted a cross-sectional descriptive study in schools. Included were children aged 3-15 years who received parental consent. The selection was conducted in two steps. After an initial examination of children within the schools, the diagnosis was then confirmed by a complete ophthalmologic examination carried out in the hospital. For ethical clearance, the study received all necessary authorizations. The data were analyzed using the CSPro version 4.0 software in French and the comparison test used was χ2 with a confidence limit of 95 %. RESULTS Out of 353 students examined, 129 were referred to the Yaoundé central hospital, among which 82 (23.2 %) were confirmed with TELC. The median age of the children diagnosed with TELC was 8.24+0.6 years. Boys (57.3 %) were affected more than girls. The age range of 6-12 years (64.6 %) was the most represented. A recrudescence of the attacks was observed during the dry season (93 %) of cases. Dust (49 %) and sun exposure (43 %) were aggravating factors. CONCLUSION The prevalence of TELC observed in school in this study is significant.
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Affiliation(s)
- E Epée
- Faculté de medecine et des sciences biomedicales de l'université de Yaoundé I, BP 11216, 11216 Yaoundé, Cameroun.
| | - G Koki
- Faculté de medecine et des sciences biomedicales de l'université de Yaoundé I, BP 11216, 11216 Yaoundé, Cameroun
| | - V A Dohvoma
- Faculté de medecine et des sciences biomedicales de l'université de Yaoundé I, BP 11216, 11216 Yaoundé, Cameroun
| | - C Kenne
- Faculté de medecine et des sciences biomedicales de l'université de Yaoundé I, BP 11216, 11216 Yaoundé, Cameroun
| | - N P Biangoup
- Faculté de medecine et des sciences biomedicales de l'université de Yaoundé I, BP 11216, 11216 Yaoundé, Cameroun
| | - O Tocke
- Faculté de medecine et des sciences biomedicales de l'université de Yaoundé I, BP 11216, 11216 Yaoundé, Cameroun
| | - C Mvilongo
- Faculté de medecine et des sciences biomedicales de l'université de Yaoundé I, BP 11216, 11216 Yaoundé, Cameroun
| | - A L Bella
- Faculté de medecine et des sciences biomedicales de l'université de Yaoundé I, BP 11216, 11216 Yaoundé, Cameroun
| | - C Ebana Mvogo
- Faculté de medecine et des sciences biomedicales de l'université de Yaoundé I, BP 11216, 11216 Yaoundé, Cameroun
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Petaccia M, Giansanti L, Leonelli F, Bella AL, Gradella Villalva D, Mancini G. Synthesis, characterization and inclusion into liposomes of a new cationic pyrenyl amphiphile. Chem Phys Lipids 2016; 200:83-93. [DOI: 10.1016/j.chemphyslip.2016.08.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 07/26/2016] [Accepted: 08/08/2016] [Indexed: 01/08/2023]
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La Bella A, Leonelli F, Migneco LM, Marini Bettolo R. (+)-Podocarpic Acid as Chiral Template in the Synthesis of Aphidicolane, Stemodane and Stemarane Diterpenoids †. Molecules 2016; 21:molecules21091197. [PMID: 27617995 PMCID: PMC6272967 DOI: 10.3390/molecules21091197] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 08/06/2016] [Revised: 09/01/2016] [Accepted: 09/02/2016] [Indexed: 11/16/2022] Open
Abstract
In this review the synthetic work in the field of aphidicolane, stemodane and stemarane diterpenoids, in which readily available (+)-podocarpic acid (4) was used as chiral template for the construction of their polycyclic structures, is described as it developed along the years. In the frame of this work (+)-podocarpic acid (4) was a very useful tool in a model study leading to the syntheses of tetracyclic ketones 7 and 8, models of key intermediates 5a and 6 in the syntheses of (+)-aphidicolin (1) and (+)-stemodin (2a), respectively. (+)-Podocarpic acid (4) was also converted into (+)-2-deoxystemodinone (2d), allowing confirmation of the stemodane diterpenoids absolute configuration, into (+)-aphidicol-15-ene (36) and into Stemodia chilensis tetracyclic diterpenoid (+)-19-acetoxystemodan-12-ol (2f), allowing confirmation of its structure. (+)-Podocarpic acid (4) was then extensively used in the work which led to the synthesis of (+)-stemar-13-ene (57) and (+)-18-deoxystemarin (3b). Finally, (+)-4 was converted into (+)-2-deoxyoryzalexin S (66), which made it possible to demonstrate that the structure of (+)-66 could not be attributed to a Chilean Calceolaria isolated diterpenoid to which this structure had been assigned.
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Affiliation(s)
- Angela La Bella
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le Aldo Moro, 5, I-00185 Roma, Italy.
| | - Francesca Leonelli
- Dipartimento di Biologia Ambientale, Università degli Studi di Roma "La Sapienza", P.le Aldo Moro, 5, I-00185 Roma, Italy.
| | - Luisa Maria Migneco
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le Aldo Moro, 5, I-00185 Roma, Italy.
| | - Rinaldo Marini Bettolo
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le Aldo Moro, 5, I-00185 Roma, Italy.
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Leonelli F, Mostarda A, De Angelis L, Lamba D, Demitri N, La Bella A, Ceccacci F, Migneco LM, Marini Bettolo R. Proof of the Structure of the Stemodia chilensis Tetracyclic Diterpenoid (+)-19-Acetoxystemodan-12-ol by Synthesis from (+)-Podocarpic Acid: X-ray Structure Determination of a Key Intermediate. J Nat Prod 2016; 79:1155-1159. [PMID: 26938881 DOI: 10.1021/acs.jnatprod.5b00834] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The first synthesis of (+)-19-acetoxystemodan-12-ol (1), a stemodane diterpenoid isolated from Stemodia chilensis, is described. The structure was supported by an X-ray crystallographic analysis of intermediate (+)-9a, which confirmed the proposed structure and excluded the structure of (-)-19-hydroxystemod-12-ene as a possible candidate for the Chilean Calceolaria diterpenoid to which the (-)-19-hydroxystemar-13-ene structure (9b) had been erroneously assigned.
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Affiliation(s)
- Francesca Leonelli
- Dipartimento di Biologia Ambientale, ‡Dipartimento di Chimica, and ∥Istituto di Metodologie Chimiche-CNR, Unità Organizzativa di Supporto, Sede di Roma, Università degli Studi di Roma "La Sapienza" , P.le Aldo Moro, 5, I-00185 Roma, Italy
- Istituto di Cristallografia-CNR, Unità Organizzativa di Supporto, Sede di Trieste, and ⊥Elettra Sincrotrone Trieste S.C.p.A. di Interesse Nazionale, Area Science Park-Basovizza , Strada Statale 14-Km 163.5, I-34149 Trieste, Italy
| | - Azzurra Mostarda
- Dipartimento di Biologia Ambientale, ‡Dipartimento di Chimica, and ∥Istituto di Metodologie Chimiche-CNR, Unità Organizzativa di Supporto, Sede di Roma, Università degli Studi di Roma "La Sapienza" , P.le Aldo Moro, 5, I-00185 Roma, Italy
- Istituto di Cristallografia-CNR, Unità Organizzativa di Supporto, Sede di Trieste, and ⊥Elettra Sincrotrone Trieste S.C.p.A. di Interesse Nazionale, Area Science Park-Basovizza , Strada Statale 14-Km 163.5, I-34149 Trieste, Italy
| | - Luca De Angelis
- Dipartimento di Biologia Ambientale, ‡Dipartimento di Chimica, and ∥Istituto di Metodologie Chimiche-CNR, Unità Organizzativa di Supporto, Sede di Roma, Università degli Studi di Roma "La Sapienza" , P.le Aldo Moro, 5, I-00185 Roma, Italy
- Istituto di Cristallografia-CNR, Unità Organizzativa di Supporto, Sede di Trieste, and ⊥Elettra Sincrotrone Trieste S.C.p.A. di Interesse Nazionale, Area Science Park-Basovizza , Strada Statale 14-Km 163.5, I-34149 Trieste, Italy
| | - Doriano Lamba
- Dipartimento di Biologia Ambientale, ‡Dipartimento di Chimica, and ∥Istituto di Metodologie Chimiche-CNR, Unità Organizzativa di Supporto, Sede di Roma, Università degli Studi di Roma "La Sapienza" , P.le Aldo Moro, 5, I-00185 Roma, Italy
- Istituto di Cristallografia-CNR, Unità Organizzativa di Supporto, Sede di Trieste, and ⊥Elettra Sincrotrone Trieste S.C.p.A. di Interesse Nazionale, Area Science Park-Basovizza , Strada Statale 14-Km 163.5, I-34149 Trieste, Italy
| | - Nicola Demitri
- Dipartimento di Biologia Ambientale, ‡Dipartimento di Chimica, and ∥Istituto di Metodologie Chimiche-CNR, Unità Organizzativa di Supporto, Sede di Roma, Università degli Studi di Roma "La Sapienza" , P.le Aldo Moro, 5, I-00185 Roma, Italy
- Istituto di Cristallografia-CNR, Unità Organizzativa di Supporto, Sede di Trieste, and ⊥Elettra Sincrotrone Trieste S.C.p.A. di Interesse Nazionale, Area Science Park-Basovizza , Strada Statale 14-Km 163.5, I-34149 Trieste, Italy
| | - Angela La Bella
- Dipartimento di Biologia Ambientale, ‡Dipartimento di Chimica, and ∥Istituto di Metodologie Chimiche-CNR, Unità Organizzativa di Supporto, Sede di Roma, Università degli Studi di Roma "La Sapienza" , P.le Aldo Moro, 5, I-00185 Roma, Italy
- Istituto di Cristallografia-CNR, Unità Organizzativa di Supporto, Sede di Trieste, and ⊥Elettra Sincrotrone Trieste S.C.p.A. di Interesse Nazionale, Area Science Park-Basovizza , Strada Statale 14-Km 163.5, I-34149 Trieste, Italy
| | - Francesca Ceccacci
- Dipartimento di Biologia Ambientale, ‡Dipartimento di Chimica, and ∥Istituto di Metodologie Chimiche-CNR, Unità Organizzativa di Supporto, Sede di Roma, Università degli Studi di Roma "La Sapienza" , P.le Aldo Moro, 5, I-00185 Roma, Italy
- Istituto di Cristallografia-CNR, Unità Organizzativa di Supporto, Sede di Trieste, and ⊥Elettra Sincrotrone Trieste S.C.p.A. di Interesse Nazionale, Area Science Park-Basovizza , Strada Statale 14-Km 163.5, I-34149 Trieste, Italy
| | - Luisa M Migneco
- Dipartimento di Biologia Ambientale, ‡Dipartimento di Chimica, and ∥Istituto di Metodologie Chimiche-CNR, Unità Organizzativa di Supporto, Sede di Roma, Università degli Studi di Roma "La Sapienza" , P.le Aldo Moro, 5, I-00185 Roma, Italy
- Istituto di Cristallografia-CNR, Unità Organizzativa di Supporto, Sede di Trieste, and ⊥Elettra Sincrotrone Trieste S.C.p.A. di Interesse Nazionale, Area Science Park-Basovizza , Strada Statale 14-Km 163.5, I-34149 Trieste, Italy
| | - Rinaldo Marini Bettolo
- Dipartimento di Biologia Ambientale, ‡Dipartimento di Chimica, and ∥Istituto di Metodologie Chimiche-CNR, Unità Organizzativa di Supporto, Sede di Roma, Università degli Studi di Roma "La Sapienza" , P.le Aldo Moro, 5, I-00185 Roma, Italy
- Istituto di Cristallografia-CNR, Unità Organizzativa di Supporto, Sede di Trieste, and ⊥Elettra Sincrotrone Trieste S.C.p.A. di Interesse Nazionale, Area Science Park-Basovizza , Strada Statale 14-Km 163.5, I-34149 Trieste, Italy
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10
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Petaccia M, Gentili P, Bešker N, D'Abramo M, Giansanti L, Leonelli F, La Bella A, Gradella Villalva D, Mancini G. Kinetics and mechanistic study of competitive inhibition of thymidine phosphorylase by 5-fluoruracil derivatives. Colloids Surf B Biointerfaces 2016; 140:121-127. [PMID: 26752208 DOI: 10.1016/j.colsurfb.2015.12.020] [Citation(s) in RCA: 8] [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: 10/02/2015] [Revised: 12/01/2015] [Accepted: 12/13/2015] [Indexed: 11/28/2022]
Abstract
In a previous investigation, cationic liposomes formulated with new 5-FU derivatives, differing for the length of the polyoxyethylenic spacer that links the N(3) position of 5-FU to an alkyl chain of 12 carbon atoms, showed a higher cytotoxicity compared to free 5-FU, the cytotoxic effect being directly related to the length of the spacer. To better understand the correlation of the spacer length with toxicity, we carried out initial rate studies to determine inhibition, equilibrium and kinetic constants (KI, KM, kcat), and get inside inhibition activity of the 5-FU derivatives and their mechanism of action, a crucial information to design structural variations for improving the anticancer activity. The experimental investigation was supported by docking simulations based on the X-ray structure of thymidine phosphorylase (TP) from Escherichia coli complexed with 3'-azido-2'-fluoro-dideoxyuridin. Theoretical and experimental results showed that all the derivatives exert the same inhibition activity of 5-FU either as monomer and when embedded in lipid bilayer.
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Affiliation(s)
- Manuela Petaccia
- Dipartimento di Scienze Fisiche e Chimiche, Università degli Studi dell'Aquila, Via Vetoio, 67100 Coppito (Aq), Italy
| | - Patrizia Gentili
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le Aldo Moro 5, 00185 Roma, Italy
| | - Neva Bešker
- CINECA, SCAI-Super Computing Applications and Innovation Department, Via dei Tizii, 6, 00185 Rome, Italy
| | - Marco D'Abramo
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le Aldo Moro 5, 00185 Roma, Italy
| | - Luisa Giansanti
- Dipartimento di Scienze Fisiche e Chimiche, Università degli Studi dell'Aquila, Via Vetoio, 67100 Coppito (Aq), Italy.
| | - Francesca Leonelli
- Dipartimento di Biologia Ambientale, Università degli Studi di Roma "La Sapienza", P.le Aldo Moro 5, 00185 Roma, Italy
| | - Angela La Bella
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le Aldo Moro 5, 00185 Roma, Italy
| | - Denise Gradella Villalva
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", P.le Aldo Moro 5, 00185 Roma, Italy
| | - Giovanna Mancini
- CNR-Istituto di Metodologie Chimiche, Via Salaria km 29.300, Monterotondo Scalo, 00016 Rome, Italy
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11
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Alisi MA, Brufani M, Cazzolla N, Ceccacci F, Dragone P, Felici M, Furlotti G, Garofalo B, La Bella A, Lanzalunga O, Leonelli F, Marini Bettolo R, Maugeri C, Migneco LM, Russo V. DPPH radical scavenging activity of paracetamol analogues. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.09.098] [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: 10/27/2022]
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12
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Leonelli F, Latini V, Trombetta A, Bartoli G, Ceccacci F, La Bella A, Sferrazza A, Lamba D, Migneco LM, Bettolo RM. Regio- and diastereoselective synthesis and X-ray structure determination of (+)-2-deoxyoryzalexin S from (+)-podocarpic acid. Structural nonidentity with its nominal natural isolated enantiomer. J Nat Prod 2012; 75:1944-1950. [PMID: 23088775 DOI: 10.1021/np300518j] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
(+)-2-Deoxyoryzalexin S (1), the nominal enantiomer of a diterpenoid isolated in Chile from Calceolaria species, was regio- and diastereoselectively synthesized from (+)-podocarpic acid. (+)-2-Deoxyoryzalexin S (1) was characterized also as its acetyl derivative, (+)-2, whose structure was confirmed by X-ray crystallographic analysis. Surprisingly, comparison of the data recorded for (+)-1 and (+)-2 and those reported in the literature for the Calceolaria isolated diterpenoid 1 and its derivative (-)-2 showed some differences, suggesting that the latter do not possess the proposed structures.
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Affiliation(s)
- Francesca Leonelli
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza" , P.le Aldo Moro, 5, I-00185 Roma, Italy
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13
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Domngang Noche C, Kengmogne B, Bella AL. [Keratouveitis and lens opacity caused by butterfly hair]. Bull Soc Belge Ophtalmol 2012:29-32. [PMID: 22978182] [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: 06/01/2023]
Abstract
Butterfly hair is known to cause eye injury. In Africa, incriminated butterflies are Hylesia (spp). We report a case of a sub-epithelial keratitis associated with anterior uveitis following a trauma by a butterfly that was complicated by late lens opacity due to butterfly hair. Ocular lesions caused by butterfly hair are rare, but require an urgent management to prevent late and severe complications due to intraocular migration of the hairs.
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14
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Leonelli F, Blesi F, Dirito P, Trombetta A, Ceccacci F, La Bella A, Migneco LM, Marini Bettolo R. Diastereoselective total synthesis of (+)-13-stemarene by fourth generation methods: a formal total synthesis of (+)-18-deoxystemarin. J Org Chem 2011; 76:6871-6. [PMID: 21726082 DOI: 10.1021/jo200945s] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The problem of constructing diastereoselectively the C/D ring system of stemarane diterpenes from a bicyclo[2.2.2]octane intermediate was solved resulting in very simple synthesis of (+)-13-stemarene 1. The obtaining of the latter represents also a formal synthesis of (+)-18-deoxystemarin 2. In the key step, the epimeric mixture 10, dissolved in toluene, was converted by the action of TsOH into (+)-stemar-13-en-15-one 28.
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Affiliation(s)
- Francesca Leonelli
- Dipartimento di Chimica, Università degli Studi di Roma La Sapienza, P.le Aldo Moro, 5, I-00185 Roma, Italy
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15
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Brufani M, Ceccacci F, Filocamo L, Garofalo B, Joudioux R, La Bella A, Leonelli F, Migneco LM, Marini Bettolo R, Farina PM, Ashcroft GS, Routley C, Hardman M, Meda C, Rando G, Maggi A. Novel Locally Active Estrogens Accelerate Cutaneous Wound Healing. A Preliminary Study. Mol Pharm 2009; 6:543-56. [DOI: 10.1021/mp800206b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mario Brufani
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
| | - Francesca Ceccacci
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
| | - Luigi Filocamo
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
| | - Barbara Garofalo
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
| | - Roberta Joudioux
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
| | - Angela La Bella
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
| | - Francesca Leonelli
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
| | - Luisa M. Migneco
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
| | - Rinaldo Marini Bettolo
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
| | - Paolo M. Farina
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
| | - Gillian S. Ashcroft
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
| | - Claire Routley
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
| | - Matthew Hardman
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
| | - Clara Meda
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
| | - Gianpaolo Rando
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
| | - Adriana Maggi
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Università degli Studi di Roma “La Sapienza”, via degli Apuli 9, I-00185 Roma, Italy, Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma “La Sapienza”, P.le Aldo Moro 5, I-00185 Roma, Italy, Euticals Ambrosia S.p.A., Via Monte Rosa, 114/116, 20089 Rozzano (MI), Italy, Faculty of Life Sciences, Michael Smith Building, University of Manchester, Oxford Road, Manchester M13 9PT, U.K.,
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16
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Porcari P, Capuani S, D'Amore E, Lecce M, La Bella A, Fasano F, Campanella R, Migneco LM, Pastore FS, Maraviglia B. In vivo (19)F MRI and (19)F MRS of (19)F-labelled boronophenylalanine-fructose complex on a C6 rat glioma model to optimize boron neutron capture therapy (BNCT). Phys Med Biol 2008; 53:6979-89. [PMID: 19001698 DOI: 10.1088/0031-9155/53/23/021] [Citation(s) in RCA: 25] [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: 11/12/2022]
Abstract
Boron neutron capture therapy (BNCT) is a promising binary modality used to treat malignant brain gliomas. To optimize BNCT effectiveness a non-invasive method is needed to monitor the spatial distribution of BNCT carriers in order to estimate the optimal timing for neutron irradiation. In this study, in vivo spatial distribution mapping and pharmacokinetics evaluation of the (19)F-labelled boronophenylalanine (BPA) were performed using (19)F magnetic resonance imaging ((19)F MRI) and (19)F magnetic resonance spectroscopy ((19)F MRS). Characteristic uptake of (19)F-BPA in C6 glioma showed a maximum at 2.5 h after compound infusion as confirmed by both (19)F images and (19)F spectra acquired on blood samples collected at different times after infusion. This study shows the ability of (19)F MRI to selectively map the bio-distribution of (19)F-BPA in a C6 rat glioma model, as well as providing a useful method to perform pharmacokinetics of BNCT carriers.
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Affiliation(s)
- Paola Porcari
- CNR-INFM SOFT, Physics Department, University of Rome "Sapienza", Rome, Italy.
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17
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Leonelli F, La Bella A, Migneco LM, Bettolo RM. Design, synthesis and applications of hyaluronic acid-paclitaxel bioconjugates. Molecules 2008; 13:360-78. [PMID: 18305424 PMCID: PMC6245481 DOI: 10.3390/molecules13020360] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [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: 01/29/2008] [Revised: 02/11/2008] [Accepted: 02/11/2008] [Indexed: 02/07/2023] Open
Abstract
Paclitaxel (1a), a well known antitumor agent adopted mainly for the treatment of breast and ovarian cancer, suffers from significant disadvantages such as low solubility, certain toxicity and specific drug-resistance of some tumor cells. To overcome these problems extensive research has been carried out. Among the various proposed strategies, the conjugation of paclitaxel (1a) to a biocompatible polymer, such as hyaluronic acid (HA, 2), has also been considered. Coupling a bioactive compound to a biocompatible polymer offers, in general, many advantages such as better drug solubilization, better stabilization, specific localization and controlled release. Hereafter the design, synthesis and applications of hyaluronic acid-paclitaxel bioconjugates are reviewed. An overview of HA-paclitaxel combinations is also given.
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Affiliation(s)
- Francesca Leonelli
- Dipartimento di Chimica and Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, Università degli Studi di Roma La Sapienza, P.le Aldo Moro 5, BOX n. 34 ROMA 62, I-00185 Roma, Italy.
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18
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Bella AL, Popolla I, Felici M, Leonelli F, Ceccacci F, Filocamo L, Migneco LM, Bettolo RM. Bicyclo[2.2.2]octane analogues of patchouli alcohol by Sakurai reaction and Nagata cyclization. Synthesis and olfactory properties of novel isopropyl derivatives. ARKIVOC 2007. [DOI: 10.3998/ark.5550190.0009.309] [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
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19
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Leonelli F, Garofalo B, La Bella A, Lasta E, Ceccacci F, Migneco LM, Marini Bettolo R. Spectroscopic characterization of 6-hydroxy and 1-methyl-6-hydroxybicyclo[2.2.2]octan-2-one ethylene acetals and ethylene dithioacetals. Magn Reson Chem 2007; 45:420-3. [PMID: 17323384 DOI: 10.1002/mrc.1964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
6-endo- and 6-exo-Hydroxybicyclo[2.2.2]octan-2-one and 1-methyl-6-endo- and 6-exo-hydroxybicyclo[2.2.2]octan-2-one ethylene acetals and ethylene dithioacetals 1-4 have been characterized by 1D and 2D NMR methods.
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Affiliation(s)
- Francesca Leonelli
- Istituto di Chimica Biomolecolare del CNR, Sezione di Roma, and Dipartimento di Chimica Università degli Studi di Roma La Sapienza, Piazzalle Aldo Moro 5, ROMA 62, I-00185 Rome, Italy
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Ebana Mvogo C, Ellong A, Bella AL, Luma H, Achu Joko H. [Ocular complications of HIV/AIDS in Cameroon: is there is any correlation with the level of CD4 lymphocytes count?]. Bull Soc Belge Ophtalmol 2007:7-12. [PMID: 18018421] [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: 05/25/2023]
Abstract
PURPOSE This study aimed to identify the ocular complications of HIV/AIDS in Cameroon and to determine if there is any correlation between their occurrence and the level of CD4 lymphocytes count. MATERIAL AND METHODS This prospective study was carried out at the General Hospital, Douala, from October 2004 to September 2005. All HIV positive patients with known CD4 count were retained for the study. Each patient had an exhaustive ocular examination. RESULTS A total of 57 patients including 30 females (52.9%) and 27 males (47.4%) were examined. The mean age was 38.9 years +/- 10.3. The eye examination was pathological in 36 patients (63.2%) and normal in 21 patients (36.8%). An ocular complaint was the inaugural manifestation of the disease in 31.6% of patients. The principal lesions of the anterior segment were herpetic keratitis (10.5%) and herpes zoster ophthalmicus (12.3%). The most common posterior segment lesions were cytomegalovirus retinitis (14%) and uveitis (15.8%). The mean CD4 count in our series was 118.3/mm3 +/- 106.7. 91.7% of patients with ocular complications have a CD4 count of less than 200/mm3. A non linear correlation was found between the CD4 level and the occurrence of ocular complications. CONCLUSION With the improvement of access to antiretroviral treatment, the ocular complications of HIV/AIDS are more common. The role of the ophthalmologist is therefore essential in the diagnosis and management of these patients.
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Affiliation(s)
- C Ebana Mvogo
- Faculté de Médecine et des Sciences Biomédicales, Université de Yaoundé I. Cameroun
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Porcari P, Capuani S, Campanella R, La Bella A, Migneco LM, Maraviglia B. Multi-nuclear MRS and 19F MRI of 19F-labelled and 10B-enriched p-boronophenylalanine-fructose complex to optimize boron neutron capture therapy: phantom studies at high magnetic fields. Phys Med Biol 2006; 51:3141-54. [PMID: 16757868 DOI: 10.1088/0031-9155/51/12/010] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [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: 11/11/2022]
Abstract
Reaction yield optimization for the synthesis and the complexation of a boron neutron capture therapy agent (19)F-labelled, (10)B-enriched p-boronophenylalanine-fructose ((19)F-BPA-fr) complex was obtained. (1)H, (19)F, (13)C and (10)B magnetic resonance spectroscopy (MRS) of the (19)F-BPA-fr complex in aqueous and rat blood solution phantoms and its spatial distribution mapping using (19)F magnetic resonance imaging (MRI) results are reported. 7 T and 9.4 T magnetic fields were used to perform MRI and MRS respectively. Our in vitro results suggest that in vivo studies on (19)F-BPA through (19)F NMR will be feasible.
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Affiliation(s)
- Paola Porcari
- Physics Department, University La Sapienza, Rome, Italy
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