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Ravenna E, Locorotondo G, Manfredonia L, Diana G, Filice M, Graziani F, Leone AM, Aurigemma C, Romagnoli E, Burzotta F, Trani C, Massetti M, Lombardo A, Lanza GA. Global longitudinal strain for prediction of mortality in ST-segment elevation myocardial infarction and aortic stenosis patients: two sides of the same coin. Eur Rev Med Pharmacol Sci 2023; 27:10736-10748. [PMID: 37975399 DOI: 10.26355/eurrev_202311_34354] [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: 11/19/2023]
Abstract
OBJECTIVE Global longitudinal strain (GLS) predicts major adverse events in ST-segment elevation myocardial infarction (STEMI) and aortic stenosis (AS). Different cut-off values and different end-points have been proposed for prognostic stratification. We aimed to verify whether a single GLS cut-off value can be used to identify increased risk of all-cause death in STEMI and AS. PATIENTS AND METHODS One-hundred- seventeen successfully treated first STEMI (age 63.8±12.5 yrs, 70% men) and 64 AS (age 80.3±6.9 yrs, 44% men) patients, undergoing echocardiography before discharge and before AS treatment, respectively, were retrospectively analyzed. GLS was analyzed, together with pulmonary artery systolic pressure (PASP), Killip class and Genereux stage. End-point was all-cause death at 6-month follow-up. RESULTS All-cause death occurred in 4 (3.4%) STEMI and 5 (7.8%) AS patients (p=ns). AS patients who died had GLS similar to died STEMI patients (9.7±2.1 vs. 11.3±1.7, p=ns). GLS cut-off ≤12% predicted death with 89% sensitivity and 70% specificity (AUC 0.84, p=0.001): STEMI and AS patients with GLS ≤12% had worse survival than STEMI and AS patients with GLS >12% (log-rank p=0.001). At multivariate Cox regression analysis, lower GLS values independently predicted death (HR 0.667, 95% CI 0.451-0.986, p=0.042), and the prediction model was improved when GLS was added to old age, significant comorbidities, PASP and Killip/Genereux stage (χ2 6.691 vs. 1.364, p=0.010). CONCLUSIONS Died patients with STEMI and AS show similar values of GLS. A unique cut-off value of GLS can reliably be used to stratify the risk of all-cause death at 6-month follow-up in both two clinical settings.
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Affiliation(s)
- E Ravenna
- Department of Cardiovascular Sciences, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy.
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Burrows D, Diana G, Pimpel B, Moeller F, Richardson MP, Bassett DS, Meyer MP, Rosch RE. Microscale Neuronal Activity Collectively Drives Chaotic and Inflexible Dynamics at the Macroscale in Seizures. J Neurosci 2023; 43:3259-3283. [PMID: 37019622 PMCID: PMC7614507 DOI: 10.1523/jneurosci.0171-22.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 02/15/2023] [Accepted: 02/19/2023] [Indexed: 04/07/2023] Open
Abstract
Neuronal activity propagates through the network during seizures, engaging brain dynamics at multiple scales. Such propagating events can be described through the avalanches framework, which can relate spatiotemporal activity at the microscale with global network properties. Interestingly, propagating avalanches in healthy networks are indicative of critical dynamics, where the network is organised to a phase transition, which optimises certain computational properties. Some have hypothesised that the pathological brain dynamics of epileptic seizures are an emergent property of microscale neuronal networks collectively driving the brain away from criticality. Demonstrating this would provide a unifying mechanism linking microscale spatiotemporal activity with emergent brain dysfunction during seizures. Here, we investigated the effect of drug-induced seizures on critical avalanche dynamics, using in vivo whole-brain 2-photon imaging of GCaMP6s larval zebrafish (males and females) at single neuron resolution. We demonstrate that single neuron activity across the whole brain exhibits a loss of critical statistics during seizures, suggesting that microscale activity collectively drives macroscale dynamics away from criticality. We also construct spiking network models at the scale of the larval zebrafish brain, to demonstrate that only densely connected networks can drive brain-wide seizure dynamics away from criticality. Importantly, such dense networks also disrupt the optimal computational capacities of critical networks, leading to chaotic dynamics, impaired network response properties and sticky states, thus helping to explain functional impairments during seizures. This study bridges the gap between microscale neuronal activity and emergent macroscale dynamics and cognitive dysfunction during seizures.Significance StatementEpileptic seizures are debilitating and impair normal brain function. It is unclear how the coordinated behaviour of neurons collectively impairs brain function during seizures. To investigate this we perform fluorescence microscopy in larval zebrafish, which allows for the recording of whole-brain activity at single-neuron resolution. Using techniques from physics, we show that neuronal activity during seizures drives the brain away from criticality, a regime that enables both high and low activity states, into an inflexible regime that drives high activity states. Importantly, this change is caused by more connections in the network, which we show disrupts the ability of the brain to respond appropriately to its environment. Therefore, we identify key neuronal network mechanisms driving seizures and concurrent cognitive dysfunction.
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Affiliation(s)
- Drw Burrows
- MRC Centre for Neurodevelopmental Disorders, King's College London, London, UK
| | - G Diana
- MRC Centre for Neurodevelopmental Disorders, King's College London, London, UK
| | - B Pimpel
- Department of Neurophysiology, Great Ormond Street Hospital NHS Foundation Trust, London, UK
- GOS-UCL Institute of Child Health, University College London, London, UK
| | - F Moeller
- Department of Neurophysiology, Great Ormond Street Hospital NHS Foundation Trust, London, UK
| | - M P Richardson
- MRC Centre for Neurodevelopmental Disorders, King's College London, London, UK
| | - D S Bassett
- Department of Bioengineering, University of Pennsylvania, Philadelphia PA, USA
- Department of Electrical & Systems Engineering, Physics & Astronomy, Neurology, and Psychiatry University of Pennsylvania, Philadelphia PA, USA
- Santa Fe Institute, Santa Fe NM, USA
| | - M P Meyer
- MRC Centre for Neurodevelopmental Disorders, King's College London, London, UK
| | - R E Rosch
- MRC Centre for Neurodevelopmental Disorders, King's College London, London, UK
- Department of Neurophysiology, Great Ormond Street Hospital NHS Foundation Trust, London, UK
- Department of Bioengineering, University of Pennsylvania, Philadelphia PA, USA
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Diana G, Donnelly R, Steele P, McCaul J, McMahon J, Subramaniam S. Incidence of cerebrovascular accident following head and neck free tissue transfer surgery. Int J Oral Maxillofac Surg 2023; 52:328-333. [PMID: 35791995 DOI: 10.1016/j.ijom.2022.06.006] [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: 09/16/2021] [Revised: 06/09/2022] [Accepted: 06/13/2022] [Indexed: 11/27/2022]
Abstract
The aim of this study was to determine the incidence of postoperative cerebrovascular accident (CVA) following head and neck free tissue transfer and to identify predictive risk factors. A retrospective audit was performed of patients who underwent head and neck reconstructive surgery at Queen Elizabeth University Hospital between 2009 and 2020. The patient records were analysed to identify those who developed CVA within 30 days after surgery. A total of 1109 patients underwent head and neck free tissue transfer surgery, including 1048 neck dissection procedures. Of these, 78.6% had one or more identified risk factors for perioperative stroke. Five patients (0.45%) developed postoperative CVA. The results showed that CVA correlated to patients with hypercholesterolemia (P = 0.007). This study demonstrates the safety of free tissue transfer. Despite underlying co-morbidities and risk factors, the incidence of CVA is low following surgery and manipulation of the major vasculature of the neck.
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Affiliation(s)
- G Diana
- Oral and Maxillofacial Surgery Department, Queen Elizabeth University Hospital, Glasgow, UK.
| | - R Donnelly
- Oral and Maxillofacial Surgery Department, Queen Elizabeth University Hospital, Glasgow, UK
| | - P Steele
- Oral and Maxillofacial Surgery Department, Queen Elizabeth University Hospital, Glasgow, UK
| | - J McCaul
- Oral and Maxillofacial Surgery Department, Queen Elizabeth University Hospital, Glasgow, UK
| | - J McMahon
- Oral and Maxillofacial Surgery Department, Queen Elizabeth University Hospital, Glasgow, UK
| | - S Subramaniam
- Oral and Maxillofacial Surgery Department, Queen Elizabeth University Hospital, Glasgow, UK
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Gail H, Tarryn B, Oluwaseyi A, Denver D, Oluchi M, Charlotte VK, Joop DJ, Diana G. An ethnobotanical survey of medicinal plants used by traditional health practitioners to manage HIV and its related opportunistic infections in Mpoza, Eastern Cape Province, South Africa. J Ethnopharmacol 2015; 171:109-15. [PMID: 26023032 DOI: 10.1016/j.jep.2015.05.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 05/13/2015] [Accepted: 05/17/2015] [Indexed: 05/21/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The aim of the study was to identify and document plants traditionally used to manage HIV and treat its opportunistic infections (OIs) in Mpoza, a rural village located in the Mount Frere Alfred Nzo District, Eastern Cape Province, South Africa. MATERIALS AND METHODS Semi-structured interviews and focus group discussions (FGDs) were conducted with 18 traditional health practitioners from January 2012 to August 2012 to obtain information about medicinal plants used in the management of HIV and treatment of OIs. RESULTS Seventeen plant species belonging to 12 families were identified for the management of HIV and treatment of OIs in Mpoza. The identified plant species belonged mostly to the families Asparagaceae (12%), Araliaceae (12%), Apiaceae (12%), Xanthorrhoeaceae (12%) and Lamiaceae (12%). The remaining 40% of identified plant species was evenly split over seven families - Urticaceae, Hypoxidaceae, Leguminosae, Verbenaceae, Rosaceae, Compositae and Rutaceae. The most frequently used medicinal plants were Hypoxis hemerocallidea (85%), Asparagus densiflorus (68%) and Lessertia frutescens (68%). The leaves (43.5%) and roots (21.7%) were the most frequently used plant parts, usually prepared as infusions and decoctions for oral administration. CONCLUSION This study provides documentation of medicinal plants used in the management of HIV and treatment of commonly associated OIs, which might provide a potential lead that will significantly contribute in reducing the burden of HIV infections in South Africa. We envisage that this paper will provide some background for further studies in developing new, effective, safe and affordable plant-derived medicines.
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Affiliation(s)
- Hughes Gail
- South African Herbal Science and Medicine Institute, University of the Western Cape, Bellville, South Africa.
| | - Blouws Tarryn
- South African Herbal Science and Medicine Institute, University of the Western Cape, Bellville, South Africa
| | - Aboyade Oluwaseyi
- South African Herbal Science and Medicine Institute, University of the Western Cape, Bellville, South Africa
| | - Davids Denver
- Department of Anthropology and Sociology, University of the Western Cape, Bellville, South Africa
| | - Mbamalu Oluchi
- School of Pharmacy, University of the Western Cape, Bellville, South Africa
| | - Van't Klooster Charlotte
- Amsterdam Institute for Social Science Research (AISSR), University of Amsterdam (UvA), P.O. Box 15718, 1001 NE Amsterdam, The Netherlands
| | - De Jong Joop
- Amsterdam Institute for Social Science Research (AISSR), University of Amsterdam (UvA), P.O. Box 15718, 1001 NE Amsterdam, The Netherlands
| | - Gibson Diana
- Department of Anthropology and Sociology, University of the Western Cape, Bellville, South Africa
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Lafranconi A, Maestroni AM, Diana G, Ferraguti P, Lemma C, Mariano R, Similini C. Inappropriate drug prescription in elderly nursing home residents. Eur J Public Health 2014. [DOI: 10.1093/eurpub/cku161.133] [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: 11/13/2022] Open
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Bern Z, Diana G, Dixon LJ, Cordero FF, Höche S, Ita H, Kosower DA, Maître D, Ozeren KJ. Missing energy and jets for supersymmetry searches. Int J Clin Exp Med 2013. [DOI: 10.1103/physrevd.87.034026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Bern Z, Diana G, Dixon LJ, Febres Cordero F, Höche S, Kosower DA, Ita H, Maître D, Ozeren K. Four-jet production at the Large Hadron Collider at next-to-leading order in QCD. Phys Rev Lett 2012; 109:042001. [PMID: 23006076 DOI: 10.1103/physrevlett.109.042001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2011] [Indexed: 06/01/2023]
Abstract
We present the cross sections for production of up to four jets at the Large Hadron Collider, at next-to-leading order in the QCD coupling. We use the BLACKHAT library in conjunction with SHERPA and a recently developed algorithm for assembling primitive amplitudes into color-dressed amplitudes. We adopt the cuts used by ATLAS in their study of multijet events in pp collisions at √s=7 TeV. We include estimates of nonperturbative corrections and compare to ATLAS data. We store intermediate results in a framework that allows the inexpensive computation of additional results for different choices of scale or parton distributions.
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Affiliation(s)
- Z Bern
- Department of Physics and Astronomy, UCLA, Los Angeles, California 90095-1547, USA
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Fliser D, Shilo V, Covic A, Besarab A, Provenzano R, Duliege AM, Chen M, Tong S, Francisco C, Gao HY, Polu K, De Francisco AL, Macdougall I, Macdougall I, Schiller B, Locatelli F, Wiecek A, Francisco C, Tang H, Tong S, Chen M, Duliege AM, Polu K, Mayo M, Covic A, Macdougall I, Macdougall I, Casadevall N, Stead R, Taal M, Faller B, Karras A, Chen M, Tong S, Duliege AM, Rowell R, Polu K, Eckardt KU, Locatelli F, Dusilova Sulkova S, Arnaud S, Bruno P, Arnaud G, Dorina V, Eric A, Gerard M, Cases A, Portoles JM, Calls J, Martinez Castelao A, Sanchez-Guisande D, Segarra A, Tsubakihara Y, Tsubakihara Y, Saito A, Saito A, Saito A, Tsubakihara Y, Martinez-Castelao A, Martinez-Castelao A, Cases A, Fort J, Bonal J, Fulladosa X, Galceran JM, Torregrosa V, Coll E, Minutolo R, Cozzolino M, DI Iorio B, Polito P, Santoro D, Manenti F, Nappi F, Feriozzi S, Conte G, De Nicola L, Mikhail A, Provenzano R, Schiller B, Besarab A, Francisco C, Gao HY, Daley R, Tong S, Mayo M, Yang A, Polu K, Macdougall I, Wiecek A, Schiller B, Canaud B, Locatelli F, Yang A, Chen M, Polu K, Francisco C, Gao HY, Tong S, Duliege AM, Provenzano R, Locatelli F, Locatelli F, Provenzano R, Besarab A, Rath T, Yang A, Mayo M, Francisco C, Macdougall I, Bartnicki P, Baj Z, Majewska E, Rysz J, Fievet P, Assem M, Brazier F, Xu X, Soltani ON, Demontis R, Barsan L, Stancu S, Stancu S, Stanciu A, Capusa C, Petrescu L, Zugravu A, Mircescu G, Malyszko JM, Levin-Iaina N, Malyszko J, Glowinska I, Koc-Zorawska E, Slotki I, Mysliwiec M, Mircescu G, Mircescu G, Capusa C, Stancu S, Barsan L, Grabowski D, Blaga V, Dumitru D, Pchelin I, Shishkin A, Kus T, Usalan C, Tiryaki O, Chin HJ, Chae DW, Kim S, Bertram H, Keller F, Rumjon A, Wood C, Wilson P, Khakoo S, Chai MO, Macdougall IC, Nuria GF, Maria Asuncion F, Jose Maria MG, Carmen C, Paloma Leticia MM, Francisco Javier L, Moniek DG, De Goeij M, Yvette M, Diana G, Friedo D, Nynke H, Lezaic V, Miljkovic B, Petkovic N, Maric I, Vucicevic K, Simic Ogrizovic S, Djukanovic L, Cases A, Martinez-Castelao A, Fort A, Bonal J, Fulladosa X, Galceran JM, Torregrosa V, Coll E, DI Giulio S, DI Giulio S, Galle J, Kiss I, Herlitz H, Wirnsberger G, Claes K, Suranyi M, Guerin A, Winearls C, Addison J, D'souza M, Froissart M, Garrido P, Garrido P, Teixeira M, Costa E, Rodrigues-Santos P, Parada B, Belo L, Alves R, Teixeira F, Santos-Silva A, Reis F, Winearls C, Winearls C, DI Giulio S, Galle J, Kiss I, Herlitz H, Wirnsberger G, Claes K, Suranyi M, Guerin A, Addison J, D'souza M, Fouqueray B, Floris M, Conti M, Cao R, Pili G, Melis P, Matta V, Murgia E, Atzeni A, Binda V, Angioi A, Peri M, Pani A, Besarab A, Belo D, Diamond S, Martin E, Sun C, Lee T, Saikali K, Franco M, Leong R, Neff T, Yu KHP, Tiranathanagul K, Praditpornsilpa K, Katavetin P, Kanjanabuch T, Avihingsanon Y, Tungsanga K, Eiam-Ong S, Macdougall IC, Casadevall N, Percheson P, Potamianou A, Foucher A, Fife D, Vercammen E. Renal anaemia - CKD 1-5. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mangiapane M, Bonafede EV, Di Carlo G, Lo Piccolo C, Vitrano M, Diana G. The quality of life in patients treated for rectal cancer. BMC Geriatr 2011. [PMCID: PMC3194353 DOI: 10.1186/1471-2318-11-s1-a27] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Serantoni S, Palumbo FP, Procacci T, Pera M, Mangiapane M, Diana G. “Less invasive” surgery in the treatment of cutaneous chronic ulcers of the lower limb in elderly. BMC Geriatr 2010. [PMCID: PMC3290257 DOI: 10.1186/1471-2318-10-s1-l18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Cudia B, Balistreri CR, Guercio G, Bavetta F, Mangiapane M, Bonafede E, LoPiccolo C, Frazzetta F, Diana G. Prognostic value of PCR, IL-6 and IL-10 serum levels in determining postoperative complications after geriatric surgery in diabetic patients. BMC Geriatr 2010. [PMCID: PMC3290193 DOI: 10.1186/1471-2318-10-s1-a5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Hempenius L, Van Leeuwen B, Spiliotis J, Veering B, Stabilini C, Stauder R, Farinella E, Ugolini G, Sanabria A, Gennari R, Diana G, Audisio R. P83 PREOP: an international study of elderly surgical oncology patients to optimize preoperative assessment. Crit Rev Oncol Hematol 2009. [DOI: 10.1016/s1040-8428(09)70121-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Daidone A, Guerrieri P, Moscadini L, Diana G, Mangiapane M, Cucchiara T, Bono M, Montemaggi P. 148 poster: Local Control (LC) and Function Preservation (FP) by HDR-Brachytherapy (HDR-BRT) in Epithelial Tumors of Facial Region. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(15)34405-4] [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: 10/23/2022]
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Rebelo H, Ana M, Favaios S, Milene F, Diana G, Carla B. 337. Anaesthetic Management of Klippel-Trénaunay Syndrome - Vascular Surgery. Reg Anesth Pain Med 2008. [DOI: 10.1136/rapm-00115550-200809001-00498] [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: 11/03/2022]
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Guercio G, Sandonato L, Cintorino D, Ricotta C, Diana G. [Hemoperitoneum from rupture of liver subcapsular hematoma after laparoscopic cholecystectomy attributed to ketorolac. Report of a case]. G Chir 2008; 29:351-353. [PMID: 18834567] [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: 05/26/2023]
Abstract
Ketorolac is one of the most common nonsteroidal anti-inflammatory drugs used to control postoperative pain. However, peri- and postoperative administration of ketorolac is associated with an increased risk of gastrointestinal bleeding as described in the literature. Notwithstanding this event is not frequent, it can expose the patient to serious complications that should be quickly recognised and effectively treated. We present a report about a female patient with cholelithiasis who underwent a laparoscopic cholecystectomy. After the operation, the patient had a haemorrhage that we attributed to surgery in a first time and then to administration of ketorolac.
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Affiliation(s)
- G Guercio
- Azienda Ospedaliera Universitaria Policlinico P. Giaccone, Palermo, Dipartimento di Chirurgia Generale, d'Urgenza e dei Trapianti d'organo, Unità Operativa Complessa di Chirurgia Generale e Geriatria
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Asteria CR, Gagliardi G, Pucciarelli S, Romano G, Infantino A, La Torre F, Tonelli F, Martin F, Pulica C, Ripetti V, Diana G, Amicucci G, Carlini M, Sommariva A, Vinciguerra G, Poddie DB, Amato A, Bassi R, Galleano R, Veronese E, Mancini S, Pescio G, Occelli GL, Bracchitta S, Castagnola M, Pontillo T, Cimmino G, Prati U, Vincenti R. Anastomotic leaks after anterior resection for mid and low rectal cancer: survey of the Italian Society of Colorectal Surgery. Tech Coloproctol 2008; 12:103-10. [PMID: 18545882 DOI: 10.1007/s10151-008-0407-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2008] [Accepted: 04/10/2008] [Indexed: 12/18/2022]
Abstract
BACKGROUND The aim of the survey was to assess the incidence of anastomotic leaks (AL) and to identify risk factors predicting incidence and gravity of AL after low anterior resection (LAR) for rectal cancer performed by colorectal surgeons of the Italian Society of Colorectal Surgery (SICCR). METHODS Information about patients with rectal cancers less than 12 cm from the anal verge who underwent LAR during 2005 was collected retrospectively. AL was classified as grade I to IV according to gravity. Fifteen clinical variables were examined by univariate and multivariate analyses. Further analysis was conducted on patients with AL to identify factors correlated with gravity. RESULTS There were 520 patients representing 64% of LAR for rectal cancer performed by SICCR members. The overall rate of AL was 15.2%. Mortality was 2.7% including 0.6% from AL. The incidence of AL was correlated with higher age (p<0.05), lower (<20 per year) centre case volume (p<0.05), obesity (p<0.05), malnutrition (p<0.01) and intraoperative contamination (p<0.05), and was lower in patients with a colonic J-pouch reservoir (p<0.05). In the multivariate analysis age, malnutrition and intraoperative contamination were independent predictors. The only predictor of severe (grade III/IV) AL was alcohol/smoking habits (p<0.05) while the absence of a diverting stoma was borderline significant (p<0.07). CONCLUSION Our retrospective survey identified several risk factors for AL. This survey was a necessary step to construct prospective interventional studies and to establish benchmark standards for outcome studies.
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Affiliation(s)
- C R Asteria
- Department of Clinical Physiopathology AOU Careggi, University of Florence, Via Morgagni 85, I-50134 Florence, Italy.
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Nazzaro P, Federici A, Lucivero V, Schirosi G, Di Noia D, Vurro L, Vulpis V, Diana G, Tinelli A, Livrea P, Federico F, Pirrelli AM. The Ambulatory Arterial Stiffness Index is Associated with Capillary Rarefaction. High Blood Press Cardiovasc Prev 2007. [DOI: 10.2165/00151642-200714030-00177] [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: 11/02/2022] Open
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Nazzaro P, Lucivero V, Schirosi G, Di Noia D, Vulpis V, Vurro L, Diana G, Prontera M, Livrea P, Federico F, Pirrelli AM. Different Morning Blood Pressure Increases are Associated to a Diverse Microvascular Damage. High Blood Press Cardiovasc Prev 2007. [DOI: 10.2165/00151642-200714030-00012] [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: 11/02/2022] Open
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Bonaiuti D, Arioli G, Diana G, Franchignoni F, Giustini A, Monticone M, Negrini S, Maini M. SIMFER Rehabilitation treatment guidelines in postmenopausal and senile osteoporosis. Eura Medicophys 2005; 41:315-37. [PMID: 16474287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Affiliation(s)
- D Bonaiuti
- Unit of Physical Medicine and Rehabilitation, S. Gerardo Hospital, Monza, Italy.
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Romano G, Lo Monte AI, Cocchiara G, Calderone F, Buscemi G, Diana G. [Laparoscopic cholecystectomy in uremic patients]. G Chir 2005; 26:40-2. [PMID: 15847094] [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: 05/02/2023]
Abstract
The aim of this study was to evaluate the effectiveness of the laparoscopic cholecystectomy performed in two uremic patients with gallstones. From January to July 2004, 15 patients with gallstones underwent to laparoscopic cholecystectomy (LC). Two patients had chronic renal failure on haemodyalisis: a symptomatic fourty-two old woman, which had primitive hyperparathyroidism and primitive hyperaldosteronism, and asymptomatic transplant candidate fifty-five old man. No minor and major complications occurred and both patients were discharged 4 days after LC. Even in uremic patients the L. C. must be the gold standard for the treatment of gallstones both symptomatic and asymptomatic.
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Affiliation(s)
- G Romano
- Unità Operativa di Chirurgia Generale, dell'Uremico e dei Trapianti d'Organo, Azienda Universitaria Policlinico "P. Giaccone", Università degli Studi di Palermo
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Franconi F, Diana G, Fortuna A, Galietta G, Trombetta G, Valentini G, Seghieri G, Loizzo A. Taurine administration during lactation modifies hippocampal CA1 neurotransmission and behavioural programming in adult male mice. Brain Res Bull 2004; 63:491-7. [PMID: 15249114 DOI: 10.1016/j.brainresbull.2004.04.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2004] [Revised: 03/26/2004] [Accepted: 04/14/2004] [Indexed: 10/26/2022]
Abstract
Taurine plays a role in neuronal development. In this study, we examined whether postnatal taurine administration influences the long-term consequences induced by mild neonatal stressors (10 min maternal deprivation plus sham injection, applied daily to neonatal mice up to 21 days). At 30 days of age stressed mice showed higher pain threshold both in the tail-flick--which measures mostly the spinal mechanisms of pain--and in the hot-plate test--which reflects mainly the supraspinal mechanisms of pain. The latter effect was prevented completely by neonatal taurine administration, while the tail-flick test was not affected, thus suggesting that spinal pain is not sensitive to taurine treatment. At 140 days of age, mice which were stressed during the neonatal period showed consistent decrease in immobility time in forced swimming test, and taurine did not influence this parameter. At the same age, the fear/anxiety axis, measured with elevated plus maze test, did not show any consistent changes. Electrophysiological experiments in brain slices obtained from adult mice showed that input-output curves in hippocampal CA1 were increased by taurine administration in lactation. Hence, neonatal administration of taurine might permanently modify the functioning of hippocampus, a brain area which is known to be crucial for learning and memory.
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Affiliation(s)
- F Franconi
- Department of Pharmacology, Center of Excellence for Biotechnology Development and Biodiversity Research, University of Sassari, Italy
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Loverro G, Diana G, Caringella AM, De Tommaso A, Vitiello F. MORPHOLOGICAL AND FUNCTIONAL DIFFERENTIATION OF NORMAL AND PATHOLOGICAL ENDOMETRIAL CELLS IN A SHORT-TERM CULTURE SYSTEM. Int J Gynecol Cancer 2003. [DOI: 10.1136/ijgc-00009577-200303001-00227] [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: 11/03/2022] Open
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Diana G, Guercio G, David M, Angileri I, Cintorino D, D'Avolio M, Lo Gerfo D. Evolution of a single unit from general to geriatric surgery: a retrospective study comparing surgical management of elderly patients. Chir Ital 2001; 53:633-40. [PMID: 11723893] [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: 02/22/2023]
Abstract
The increase in the geriatric population in recent decades was not followed by a corresponding increase in attention on the part of surgeons to elderly patients until, in the '80s, many clinical studies showed that postoperative morbidity and mortality were related to the associated diseases rather than to the patients' age. To evaluate whether greater attention to the elderly is capable of increasing the number of operations that can be performed when necessary, we retrospectively surveyed the activity of a division of general surgery over two different periods of 5 years: the first one from 01/01/1985 to 31/12/1989 and the second from 01/01/1995 to 31/12/1999, when a team was specifically set up to take care of elderly patients. We registered a significant difference in the number of elderly patients operated on for tumours (134 vs. 208), an increase in colorectal neoplasms (24 vs. 70) and significant differences between radical and palliative surgery (P = 0.03). The extension of radical interventions for cancer to the elderly resulted in a moderate increase in postoperative complications. The surgery-related mortality was around 3.5% in both periods. Thus, a team of surgeons specifically dedicated to aged patients can improve the number of surgical operations performed in these subjects when required without any rise in postoperative mortality.
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Affiliation(s)
- G Diana
- Department of General Surgery Emergency Surgery and Organs Transplantation, Chair of Geriatric Surgery, Unit of Geriatric Surgery, University of Palermo
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Cibelli G, Corsi P, Diana G, Vitiello F, Thiel G. Corticotropin-releasing factor triggers neurite outgrowth of a catecholaminergic immortalized neuron via cAMP and MAP kinase signalling pathways. Eur J Neurosci 2001; 13:1339-48. [PMID: 11298794 DOI: 10.1046/j.0953-816x.2001.01510.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.8] [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: 11/20/2022]
Abstract
Corticotropin-releasing factor (CRF), a neuropeptide of 41 amino acids, acts as the major physiological regulator of the basal and stress-induced release of corticotropin (ACTH), beta-endorphin and other proopiomelanocortin-derived peptides from the anterior pituitary gland. In addition to its endocrine activity, CRF displays extrahypophysiotropic effects, mainly as a regulator of stress responses. We show here that CRF may additionally function as a differentiating factor in immortalized noradrenergic neuronal CATH.a cells that express CRF receptor type I and resemble locus coeruleus-derived neurons. CRF triggers morphological changes in CATH.a cells including the appearance of extended long, slender neurites with prominent growth cones. CRF-treated CATH.a cells exhibit a morphology similar to locus coeruleus neurons in primary culture. CRF-induced neurite outgrowth of CATH.a cells was blocked by addition of inhibitors for cAMP-dependent protein kinase or extracellular signal-regulated protein kinase (ERK), a subtype of the mitogen-activated protein kinases. The participation of ERK within the CRF signalling cascade was further confirmed by Western blot experiments, with antibodies directed against the phosphorylated form of ERK, and also with transcription-based assays. We conclude that CRF functions as a differentiating factor of CATH.a cells via the cAMP and the MAP kinase signalling pathways.
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Affiliation(s)
- G Cibelli
- Department of Pharmacology and Human Physiology, Medical Faculty, University of Bari, I-70124 Bari, Italy
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Sanguedolce R, Alessandro R, De Leo G, Gullotti L, Sanguedolce F, Vultaggio G, Diana G, Cirello B, Rausa L. Failure of detection of the tyrosine to histidine substitution at the residue 33 of thymidylate synthase in human colorectal cancer. A preliminary study. Anticancer Res 2000; 20:4347-50. [PMID: 11205269] [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: 02/19/2023]
Abstract
Structural changes in the macromolecular targets of pharmacological agents can result in alterations in the efficacy of these agents. In previous studies Berger et al. (1) identified a variant structural form of thymidylate synthase (TS) that is associated with relative resistance to 5-fluoro-2'-deoxyuridine, in a human colonic tumor cell line. They observed that expression of the variant TS, which differs from the normal form by a tyrosine to histidine substitution at residue 33, confers a 4-fold level of drug resistance in mammalian cells, as well as in bacteria. Now we report on the use of RT-PCR techniques to see if that variant TS form could be present in human samples from patients who underwent surgery for primary colorectal cancer and been previously untreated and to try to find relationships between that hypothetical variant TS form and the 5-Fluorouracil treatment. The possible role of Tyr-33 in 5-fluoropyrimidine-mediated inhibition of TS is discussed.
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Affiliation(s)
- R Sanguedolce
- Dipartmenti di Scienze Farmacologiche, Policlinico Via Del Vespro N. 127, Palermo, Italy.
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Diana G, Catanzaro M, Ferrara A, Ferrari P. [Activity of purified diosmin in the treatment of hemorrhoids]. Clin Ter 2000; 151:341-4. [PMID: 11141716] [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: 02/18/2023]
Abstract
Several theories on the etio-pathogenesis and physio-pathology of hemorrhoids have been up to now proposed. From the fisio-pathological viewpoint, particular importance is retained by the vascular factor, which in its turn is influenced by mechanical and sphinceric factors, that impair the venous back-flow. In the evidence of an hemorrhoidal crisis, characterized by local oedema, pain and bleeding, the use of bioflavonoid drugs is deemed to be the first choice. We investigated the use of purified diosmin, given at a dose of two 450 mg tablets bid for the first 7 days, then at 1 tablet bid for up to 2 months, in a group of 66 patients suffering from primitive hemorrhoids of grade 1-4. Our results confirmed diosmin efficacy in decreasing both pain and bleeding: reduction rates of 79% and 67%, respectively, were reached in the first treatment week. In the second week, figures were 98% and 86%, respectively. Diosmin tolerability was excellent: this characteristic makes the drug very easy to handle by the general practitioner and also useful to the proctologist in the preparation of patient to further treatments.
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Affiliation(s)
- G Diana
- Università degli Studi di Palermo, Dipartimento di Chirurgia Generale, d'Urgenza e dei Trapianti d'Organo, Palerma, Italia
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De Logu A, Fadda AM, Pellerano ML, Diana G, Schivo ML. Prevention by L-alpha-phosphatidylcholine of antifungal activity in vitro of liposome-encapsulated imidazoles determined by using time-killing curves. Int J Antimicrob Agents 2000; 15:43-8. [PMID: 10856676 DOI: 10.1016/s0924-8579(00)00124-2] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The antifungal activity of the imidazole derivatives miconazole and ketoconazole was reduced when they were entrapped in liposomal structures and significant differences were detected between small unilamellar vesicles (SUV) and multilamellar vesicles (MLV). To understand which component of liposomes interfered with the antifungal activity of miconazole and ketoconazole, we examined the influence of pure egg and soy L-alpha-phosphatidylcholine and cholesterol on activity against Candida albicans ATCC E10231 by time killing curves. Association of phospholipids-cholesterol-imidazole leads to an inhibitory effect on the antifungal activity comparable to that shown when miconazole or ketoconazole were entrapped in SUV liposomes or when miconazole and ketoconazole were incubated in the presence of L-alpha-phosphatidylcholine. The antifungal activity determined in the presence of cholesterol was comparable to that observed with the free drugs. Inhibition of the antifungal activity of miconazole and ketoconazole by phospholipids is dependent on the phospholipid concentration but is independent of the source of phospholipids (egg or soy). Cholesterol had no influence on the antifungal activity of the imidazoles, unlike the effect on other antifungal drugs, such as amphotericin B.
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Affiliation(s)
- A De Logu
- Sezione di Microbiologia e Virologia, Dipartimento di Scienze Chirurgiche e Trapianti d'Organo, Universit¿a di Cagliari, Via Palabanda 14, 09123, Cagliari, Italy.
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Bertelli AA, Ferrara F, Diana G, Fulgenzi A, Corsi M, Ponti W, Ferrero ME, Bertelli A. Resveratrol, a natural stilbene in grapes and wine, enhances intraphagocytosis in human promonocytes: a co-factor in antiinflammatory and anticancer chemopreventive activity. Int J Tissue React 2000; 21:93-104. [PMID: 10761539] [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: 02/16/2023]
Abstract
Trans-resveratrol, a natural stilbene present in wine and grapes, has been studied mainly for its antiinflammatory and anticancer activities. In this study the activity of resveratrol on proliferative immunological parameters (differentiation, apoptosis, phagocytosis and intracellular killing) was studied using a U937 human promonocytic cell line in comparison with another polyphenol, quercetin. After incubation of the pathogen, Candida albicans, intracellular killing by macrophage-like cells was decreased by quercetin and resveratrol 10 microM but was enhanced by resveratrol 1 microM after 20 h of treatment. Phagocytosis rate, expressed as phagocytosis frequency, (i.e., percentage number of phagocytosing cells/total cells) at 20 h was highest with resveratrol 10 microM and was higher with quercetin 10 microM than with resveratrol 1 microM. The phagocytosis index exhibited the same trend. While both polyphenols demonstrated cytostatic activity on U937 growth, a prointraphagocytic effect for resveratrol 10 microM-treated cells at 10 min, resveratrol 1 microM-treated cells at 20 h and resveratrol 10 microM-treated cells at 48 h was observed. Morphological examination with optic microscopy demonstrated both apoptotic and differentiating cells, even after 10 min treatment. Resveratrol-induced apoptosis (following 4 h treatment) was confirmed by flow cytometry at concentrations as low as 1 microM and 100 nM in the assay for detection of membrane phosphatidylserine. Resveratrol- or quercetin-treated, but unstimulated cells, did not produce tumor necrosis factor-alpha protein. As phosphatidylserine externalization triggers specific recognition by monocytes and macrophages, removal of intact apoptotic cells is important a) in cell population selection and differentiation for antiblastic therapy, and b) in preventing the release of toxic inflammatory substances such as reactive oxygen substances and proteolytic enzymes by dying cells. This observation suggests that wine polyphenols, at the same concentrations as those found in plasma after moderate wine consumption, are important cofactors in antiinfective, antiinflammatory and anticancer nonspecific immune reactions.
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Affiliation(s)
- A A Bertelli
- Institute of Human Anatomy, Faculty of Medicine, University of Milan, Italy.
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Sanguedolce R, Vultaggio G, Sanguedolce F, Modica G, Li Volsi F, Diana G, Guereio G, Bellanca L, Rausa L. The role of thymidylate synthase levels in the prognosis and the treatment of patients with colorectal cancer. Anticancer Res 1998; 18:1515-20. [PMID: 9673363] [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: 02/08/2023]
Abstract
Inhibition of Thymidylate Synthase (TS) by the 5-Fluorouracil (5Fu) active metabolite Fluoro-deoxy-uridine-monophosphate (FdUMP) is considered to be the main mechanism of action of 5Fu. TS level from tumors and normal mucosa of 62 untreated patients who underwent surgery for primary colorectal adenocarcinoma was performed. The aim of this study was to evaluate the possibility of considering the TS level as a prognostic factor of the disease. A large variation in the level of the enzyme was found among tumors. Our data demonstrate that there is no association with age, sex, and tumor size; however there are significant relationships between TS levels and staging and histological grading. In fact the TS values are higher in Dukes' A and in G1 than in Dukes' D and G3 tumors (p < 0.05). Another significant association has been found between the TS level and tumor site: pts with right colon neoplasias had higher TS levels than pts with left and rectum ones. An interesting trend was found between the TS levels and survival parameters. Pts who had lower TS levels had a significantly increased risk of death (p < 0.05) over pts with a higher outcome. Our data support the hypothesis that a high TS level is a favourable prognostic factor in human untreated colorectal carcinomas according to our previous preliminary data (1).
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Affiliation(s)
- R Sanguedolce
- Istituto di Farmacologia, Policlinico Via del Vespro, Palermo, Italia.
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Diana G, Catanzaro M, David M, Guercio G. [The prognosis of surgery on the elderly. Proposal for a parametric evaluation]. MINERVA CHIR 1998; 53:251-9. [PMID: 9701979] [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: 02/08/2023]
Abstract
BACKGROUND AND AIMS To data there are no preoperative systems of evaluating surgical risk specifically in geriatric patients. Given that it was thought useful to formulate a score-based prognostic system for these patients based on surgical risk, the authors collected a wide range of preoperative data with the aim of identifying the easily determined variables. METHODS While data from other hospital centres are in the process of being collected, the authors report the data for 122 over 65-year-old patients who underwent elective surgery up until 30-1-1996 out of a total of 329 hospitalized patients. In addition to a wide series of objective, laboratory and instrumental data, the study also took into account the pathology requiring to surgery, any associated morbid conditions, psychic and social conditions, the type of surgery and local and/or general postoperative complications. RESULTS Hernia of the abdominal wall were found to be the most frequent cause of surgery (41 cases), followed by 27 neoplasias of various organs and biliary lithiasis (20 cases). Cardiovascular diseases were the most common associated pathologies (85 patients). A total of 13 major and 80 medium operations were performed, including 16 cholecystectomies. Among the general complications, an altered acid-base balance was found in 7 patients. Two deaths were recorded within 30 days of surgery. When the data collection is complete, the results will be analysed statistically in order to obtain a numerical calculation of the coefficients of risk correlated to the individual variables. CONCLUSIONS This will enable the criteria of operability to be broadened, thereby allowing surgery to be performed in those patients who are currently excluded merely on the basis of the personal judgement of the surgeon and anesthetist.
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Affiliation(s)
- G Diana
- Cattedra di Chirurgia Geriatrica, Università degli Studi, Palermo
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Rusakov DA, Davies HA, Harrison E, Diana G, Richter-Levin G, Bliss TV, Stewart MG. Ultrastructural synaptic correlates of spatial learning in rat hippocampus. Neuroscience 1997; 80:69-77. [PMID: 9252221 DOI: 10.1016/s0306-4522(97)00125-5] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.9] [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: 02/05/2023]
Abstract
Memory formation is believed to alter neural circuitry at the synaptic level. Although the hippocampus is known to play an important role in spatial learning, no experimental data exist on the synaptic correlates of this process at the ultrastructural level. Here, we have employed quantitative electron microscopy in order to compare the density, size and spatial arrangement of synapses in the dentate gyrus, and in area CA1, of spatially trained (water maze, invisible platform) versus control (visible platform) rats. No training-associated changes of hippocampal volume were found using a stereological estimaion (disector) of the volume density of dentate granule, or CA1 pyramidal cells. Nor were changes found in either density, or sizes of synapses (spinous or dendritic), in CA1 or dentate gyrus. However, analysis of synaptic spatial distribution showed a training-associated increase in the frequency of shorter distances (i.e. clustering) between synaptic active zones in CA1, but not dentate, thus indicating alterations in local neural circuitry. This finding indicates subtle changes in synaptic organization in area CA1 of the hippocampus following a learning experience, suggesting that spatial memory formation in mammalian hippocampus may involve topographical changes in local circuitry without synapse formation de novo.
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Affiliation(s)
- D A Rusakov
- Department of Biology, The Open University, Milton Keynes, U.K
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Peri G, Farina F, Marcianò V, Ridola C, Diana G, Arcara M, Guercio G, Sommariva V. Clinical and anatomic features of the inguinal canal during hernia. Ital J Anat Embryol 1996; 101:69-80. [PMID: 8997902] [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
Seventy-eight patients affected by inguinal hernia, 33 by direct and 45 by indirect external oblique types, were studied. The morphologic and structural aspects of the inguinal canal including its length, the diameter of the deep inguinal ring and the qualitative features of the fascia transversalis and aponeuroses of the external and internal oblique muscles and of the transversus muscle were investigated. In all 78 patients with inguinal hernia, the length of the canal was 4.7 cm. In the 33 patients with direct inguinal hernia the width of the deep inguinal ring varied from 1.5 to 2.5. The aponeurosis of the external oblique muscle was dense in 19 cases (57.58%), rather laddered in 10 (30.30%) and very laddered in 4 (12.12%). The fascia transversalis was discontinued in 28 cases (84.85%) and velamentous in 5 cases (15.15%). In the 45 patients with indirect inguinal hernia the width of the deep inguinal ring varied from 1.5 to 7 cm. The aponeurosis of the external oblique muscle was dense in 14 cases (31.11%), rather laddered in 23 cases (51.11%), very laddered in 8 (17.78%). The fascia transversalis was dense in 15 (33.33%), elastic in 17 (37.78%) and velamentous in 13 cases (28.89%). Based on the results of this study, a series of therapeutic considerations are set forth. The most important of these include early surgical intervention, which is absolutely necessary, and the use of prostheses in the inguinal canal.
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Affiliation(s)
- G Peri
- Department of Surgery and Human Anatomy, University of Palermo, Italy
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Dessì C, Clemente MG, Diana G, Congia M, Frau F, Lai ME, Mazzoleni AP, Balestrieri A, Cengiarotti L, Piano P. Cryoglobulinemia in transfusion-dependent thalassemia major. Clin Exp Rheumatol 1995; 13 Suppl 13:S149-51. [PMID: 8730496] [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: 02/01/2023]
Abstract
OBJECTIVE The aim of this study was to determine the frequency of cryoglobulinemia and associated symptoms in transfusion-dependent thalassemia patients at high risk for HCV infection. METHODS A controlled epidemiological study was used to evaluate the prevalence of clinical, biochemical and immunological abnormalities in a group of 264 HCV-positive and 106 HCV-negative transfusion-dependent thalassemia patients. Haematologic and hepatic function tests were performed according to standard methods. HCV-RNA was detected by PCR analysis. RESULTS The significant presence of cryoglobulinemia and associated symptoms (purpura, vasculitis, arthritis, asthenia, proteinuria), serum autoantibodies (SMA, anti-GOR, ANA, LKM), low complement and rheumatoid factor were found in HCV-positive compared with HCV-negative patients. CONCLUSIONS This study demonstrates the role of HCV in inducing cryoglobulinemia and immunological disorders in transfusion-dependent thalassemia patients. HCV infection and associated immune abnormalities are a new clinical aspect of, and deserve particular attention due to their high frequency in, transfusion-dependent thalassemia patients.
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Affiliation(s)
- C Dessì
- Istituto di Clinica e Biologia dell'Età Evolutiva, Università degli Studi di Cagliari, Italy
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Spila-Alegiani S, Diana G, Menniti-Ippolito F, Raschetti R. Anticholinergic antiparkinsonian therapy in outpatients treated with neuroleptic drugs: a prescription survey. Eur J Clin Pharmacol 1995; 48:513-7. [PMID: 8582472 DOI: 10.1007/bf00194343] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Extrapyramidal adverse effects (EPAs) due to neuroleptic treatment are routinely treated with anti-cholinergic antiparkinsonian drugs (APDs). We studied the use of these drugs in the general population exposed to neuroleptic drugs to improve our knowledge of the epidemiology of EPAs. We selected all the neuroleptic and antiparkinsonian drug prescriptions delivered in the province of Rome (ca. 3,750,000 inhabitants) from 1986 to 1989. During the study period, 10.6% of neuroleptic-treated subjects were concurrently prescribed anticholinergic antiparkinsonian drugs. The influence of different factors on APD prescriptions was evaluated through a logistic regression model. The highest probability of receiving APDs was associated with trifluperidol treatment (odds ratio = 5.0, using chlorpromazine as baseline); among the commonly prescribed neuroleptics, sulpiride, levosulpiride and tiapride chlorydrate had the lowest probability of coprescription with APDs (odds ratios less than 0.1). The probability of being prescribed anticholinergic antiparkinsonian drugs decreased with age and increased with the amount of neuroleptics prescribed. This study surveys a very large sample using a population-based approach, whereas the same topics have previously only been studied in limited inpatient populations.
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Affiliation(s)
- S Spila-Alegiani
- Department of Epidemiology and Biostatistics, Istituto Superiore di Sanità, Rome, Italy
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Diana G, Domenici MR, Scotti de Carolis A, Loizzo A, Sagratella S. Reduced hippocampal CA1 Ca(2+)-induced long-term potentiation is associated with age-dependent impairment of spatial learning. Brain Res 1995; 686:107-10. [PMID: 7583262 DOI: 10.1016/0006-8993(95)00440-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.2] [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: 01/26/2023]
Abstract
Expression of Ca(2+)-induced CA1 long-term potentiation (LTP) was analysed in hippocampal slices obtained from (1) 3-month-old and (2) 18-20-month-old Sprague-Dawley rats selected for their performances in the Morris water maze task. In all slices, a transient (10 min) increase of extracellular Ca2+ concentration (4 mM) caused a long-lasting enhancement of potentials evoked by electrical stimulation of radiatum fibers. However, a significant difference was found in the degree of potentiation among groups. In particular, increases of the CA1 response amplitudes were significantly lower in old rats impaired in spatial learning than in young at 30 (P < 0.05), 60, 90 and 120 min (P < 0.01) after restoring the normal Ca2+ concentration. On the contrary, no differences were observed between young animals and the old ones with good performances in spatial learning. The data suggest that amplitude of CA1 Ca(2+)-induced LTP in old rats is related to spatial learning abilities.
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Affiliation(s)
- G Diana
- Laboratorio di Farmacologia, Istituto Superiore di Sanita, Roma, Italy
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Abstract
BACKGROUND Group B coxsackieviruses (CVBs) are etiologic agents of a number of human diseases that range in severity from asymptomatic to lethal infections. They are small, single-stranded RNA icosahedral viruses that belong to the enterovirus genus of the picornavirus family. Structural studies were initiated in light of the information available on the cellular receptors for this virus and to assist in the design of antiviral capsid-binding compounds for the CVBs. RESULTS The structure of coxsackievirus B3 (CVB3) has been solved to a resolution of 3.5 A. The beta-sandwich structure of the viral capsid proteins VP1, VP2 and VP3 is conserved between CVB3 and other picornaviruses. Structural differences between CVB3 and other enteroviruses and rhinoviruses are located primarily on the viral surface. The hydrophobic pocket of the VP1 beta-sandwich is occupied by a pocket factor, modeled as a C16 fatty acid. An additional study has shown that the pocket factor can be displaced by an antiviral compound. Myristate was observed covalently linked to the N terminus of VP4. Density consistent with the presence of ions was observed on the icosahedral threefold and fivefold axes. CONCLUSIONS The canyon and twofold depression, major surface depressions, are predicted to be the primary and secondary receptor-binding sites on CVB3, respectively. Neutralizing immunogenic sites are predicted to lie on the extreme surfaces of the capsid at sites that lack amino acid sequence conservation among the CVBs. The ions located on the icosahedral threefold and fivefold axes together with the pocket factor may contribute to the pH stability of the coxsackieviruses.
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Affiliation(s)
- J K Muckelbauer
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
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Menniti-Ippolito F, Spila-Alegiani S, Vanacore N, Bonifati V, Diana G, Meco G, Raschetti R. Estimate of parkinsonism prevalence through drug prescription histories in the Province of Rome, Italy. Acta Neurol Scand 1995; 92:49-54. [PMID: 7572060 DOI: 10.1111/j.1600-0404.1995.tb00465.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
INTRODUCTION The objective of the study was to estimate the prevalence of parkinsonism in the Province of Rome using antiparkinsonian prescription histories from 1986 to 1991. METHODS A subject was defined as a case of parkinsonism if he/she had received "specific" and "consistent" antiparkinsonian therapy in the study period. RESULTS In November 1990, 6,572 patients were defined as prevalent cases of parkinsonism. The crude prevalence ratio, for the total population of the Province of Rome, is 173.5 per 100,000 inhabitants (165.9 per 100,000 in men and 180.5 per 100,000 in women). The method was validated by record-linkage with clinical records of all patients visited during 1990 at the Department of Neurological Sciences of the University of Rome "La Sapienza". The sensitivity of the prevalence study was 83.6%. CONCLUSIONS The use of a computerized data base of all prescription data, routinely collected for administrative purposes, enabled us to obtain a prevalence estimate based on a very large population, with low costs and in a relatively short time.
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Sagratella S, Scotti de Carolis A, Diana G, Domenici MR, Popoli P. Selective reduction of hippocampal dentate frequency-potentiation in striatally lesioned rats with impaired place learning. Brain Res 1994; 660:66-72. [PMID: 7828002 DOI: 10.1016/0006-8993(94)90839-7] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The induction of hippocampal frequency-potentiation (i.e. post-tetanic potentiation (PTP) and long-term potentiation (LTP) was analyzed in rat hippocampal slices obtained from animals showing impaired place learning in the Morris water maze as a consequence of bilateral striatal injection of quinolinic acid. Vehicle-injected animals, showing normal performances in the Morris water maze, behaved as controls. After the application of an electrical tetanus (1 s, 100 Hz, 50 microA) in the stratum radiatum, no significant differences were found in the percent of induction of both PTP and LTP in the CA1 area of hippocampal slices obtained from lesioned and sham-operated rats. After the application of an electrical tetanus (1 s, 100 Hz 50 microA) in the stratum moleculare, a significant difference was found in the percent of dentate PTP induction in hippocampal slices obtained from lesioned and sham-operated rats. Specifically, dentate PTP induction was significantly (P < 0.01) higher in slices obtained from sham-operated rats with a good performance in the Morris water maze than in slices obtained from striatally lesioned rats, which had shown poor performance in the Morris water maze. On the contrary, no significant differences were found in the percent of dentate LTP in hippocampal slices obtained from rats of the two groups. The data demonstrate that the impairment of the place learning in striatally lesioned rats is associated with a selective reduction of hippocampal dentate frequency-potentiation.
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Affiliation(s)
- S Sagratella
- Pharmacology Department, Istituto Superiore di Sanita, Roma, Italy
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Clemente MG, Congia M, Lai ME, Lilliu F, Lampis R, Frau F, Frau MR, Faa G, Diana G, Dessì C. Effect of iron overload on the response to recombinant interferon-alfa treatment in transfusion-dependent patients with thalassemia major and chronic hepatitis C. J Pediatr 1994; 125:123-8. [PMID: 8021761 DOI: 10.1016/s0022-3476(94)70138-5] [Citation(s) in RCA: 86] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The purpose of this study was to determine whether interferon-alfa (IFN-alpha) therapy benefits patients with transfusion-dependent thalassemia and chronic active hepatitis C, and whether their iron burden modifies the response to this therapy. We conducted a controlled trial of recombinant IFN-alpha (3 million units per square meter of body surface area, three times a week for 15 months) in 65 patients with thalassaemia major and chronic active hepatitis C; 14 of them were untreated control subjects. In 21 of the 51 treated patients, alanine aminotransferase values returned to normal within 6 months, and hepatitis C virus ribonucleic acid was no longer detected in serum; no changes were detected among control subjects. The response to IFN-alpha therapy was inversely related (p < 0.002) to the liver iron burden as assessed by atomic absorption, the histologic semiquantitative method, or both methods. During 3 years of follow-up, two responder patients had relapses. We conclude that IFN-alpha represents a useful therapeutic option for children with transfusion-dependent thalassemia and chronic active hepatitis C with a mild to moderate iron burden.
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Affiliation(s)
- M G Clemente
- Istituto di Clinica e Biologia dell'Età Evolutiva, Università degli Studi, Cagliari, Italy
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Diana G, Sagratella S. Different capability of N-methyl-D-aspartate antagonists to affect locomotor/exploratory activity of mice in a computerized on-line open field test. Pharmacol Biochem Behav 1994; 48:291-5. [PMID: 8029300 DOI: 10.1016/0091-3057(94)90529-0] [Citation(s) in RCA: 27] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The effects of the competitive N-methyl-D-aspartate (NMDA) antagonists CGS 19755 and CPP, and of the noncompetitive NMDA antagonists PCP, MK 801, and dextromethorphan (DM) have been studied on the locomotor/exploratory activity of mice in a computerized on-line open field test. CGS 19755 (12.5-25 mg/kg, IP) induced a dose-dependent decrease in the locomotor/exploratory activity of mice; CPP (25-50 mg/kg, IP) did not present such an effect. PCP (1.25-10 mg/kg, IP) induced a dose-dependent increase/decrease in the locomotor/exploratory activity of mice, and DM (25-50 mg/kg, IP) and MK 801 (0.125-0.250 mg/kg, IP) increased it. The data show that NMDA antagonists affect locomotor/exploratory activity of mice in different ways, inducing both potentiating and inhibitory effects.
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Affiliation(s)
- G Diana
- Pharmacology Department, Istituto Superiore di Sanitá, Roma, Italy
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Diana G, Domenici MR, Loizzo A, Scotti de Carolis A, Sagratella S. Age and strain differences in rat place learning and hippocampal dentate gyrus frequency-potentiation. Neurosci Lett 1994; 171:113-6. [PMID: 8084469 DOI: 10.1016/0304-3940(94)90618-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.5] [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: 01/28/2023]
Abstract
Induction of post-tetanic potentiation (PTP) and long-term potentiation (LTP) was analyzed in hippocampal slices obtained from (i) young (6 months old) rats of different strains (Sprague-Dawley, SD; spontaneously hypertensive rats, SHR; and Wistar-Kyoto, WKY), and (ii) from aged (20-24 months old) SD and Fischer 344 (F 344) rats, each group showing a different performance in the Morris maze test. After the application of an electrical tetanus (1 s, 100 Hz, 50 microA) in the stratum moleculare, a significant difference was found in the percent of induction of the dentate PTP in hippocampal slices obtained from rats of different strains and ages. In particular, the induction of the dentate PTP was significantly (P < 0.01) higher in slices obtained from young SD or spontaneously SHR rats, having the better performance in the Morris maze than in slices obtained from old SD or F 344 rats or young WKY rats which had poorer performances in the Morris maze. On the contrary, no significant differences were found in the percent of induction of the LTP in the dentate area of hippocampal slices obtained from rats of different strains and ages. Moreover, after the application of an electrical tetanus (1 s, 100 Hz, 50 microA) in the stratum radiatum, no significant differences were found in the percent of induction of both PTP and LTP in the CA1 area of hippocampal slices obtained from rats of different strains and ages.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- G Diana
- Laboratorio di Farmacologia, Istituto Superiore Di Sanitá, Roma, Italy
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Diana G, Scotti de Carolis A, Frank C, Domenici MR, Sagratella S. Selective reduction of hippocampal dentate frequency potentiation in aged rats with impaired place learning. Brain Res Bull 1994; 35:107-11. [PMID: 7953765 DOI: 10.1016/0361-9230(94)90089-2] [Citation(s) in RCA: 28] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Induction of posttetanic potentiation (PTP) and long-term potentiation (LTP) was analyzed in hippocampal slices obtained from a) young 6-month-old Sprague-Dawley (SD) rats, all of them performing well in the Morris Maze, and b) aged SD 20-month-old and Fischer 344 24-month-old rats showing different degrees of ability in the same test. After the application of an electrical tetanus 1 s, 100 Hz, 50 microA in the stratum radiatum, no significant differences were found in the percent of induction of both PTP and LTP in the CA1 area of hippocampal slices obtained from rats of different strains and ages. After the application of an electrical tetanus 1 s, 100 Hz, 50 microA in the stratum moleculare, a significant difference was found in the percent of dentate PTP induction in hippocampal slices obtained from rats of different ages. Specifically, dentate PTP induction was significantly (p < 0.01) higher in slices obtained from young SD rats, and from old SD rats with a better performance in the Morris maze, escape latency less than 10 s and 150 cm, than in slices obtained from old SD or Fischer 344 rats that had shown poor performance in the Morris Maze. On the contrary, no significant differences were found in the percent of dentate LTP in hippocampal slices obtained from rats of different strains and ages. The data demonstrate that the induction of hippocampal dentate high-frequency PTP is selectively reduced in old rats with impaired Morris Maze performance.
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Affiliation(s)
- G Diana
- Pharmacology Department, Istituto Superiore di Sanità, Roma, Italy
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45
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Popoli P, Pèzzola A, Domenici MR, Sagratella S, Diana G, Caporali MG, Bronzetti E, Vega J, Scotti de Carolis A. Behavioral and electrophysiological correlates of the quinolinic acid rat model of Huntington's disease in rats. Brain Res Bull 1994; 35:329-35. [PMID: 7850482 DOI: 10.1016/0361-9230(94)90109-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [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: 01/27/2023]
Abstract
The influence of bilateral intrastriatal injection of quinolinic acid (QA, 300 nmol) was studied in male Wistar rats. Behavioral and electrophysiological experiments were conducted in 15 lesioned plus 15 vehicle-injected (control) animals. With respect to control animals, QA-lesioned rats showed marked, statistically significant alterations from both the behavioral (greater motor activation in response to d-amphetamine, place-learning deficit in the Morris water maze), and the electroencephalographic (reduced voltage amplitude and EEG power at the level of frontal cortex) points of view. In addition, a significant loss in body weight and a marked striatal gliosis (GFAP staining) were observed in lesioned rats. Conversely, QA-lesioned rats did not show modifications in posttetanic potentiation (P.T.P.) or long-term potentiation (L.T.P.) in CA1 hippocampal area. The present results confirm that QA lesions of rat striatum may be regarded as a suitable model of Huntington's disease (HD).
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Affiliation(s)
- P Popoli
- Department of Pharmacology, Istituto Superiore di Sanità, Rome, Italy
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Diana G, Jaeger EP, Peterson ML, Treasurywala AM. The use of an algorithmic method for small molecule superimpositions in the design of antiviral agents. J Comput Aided Mol Des 1993; 7:325-35. [PMID: 8397301 DOI: 10.1007/bf00125506] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The inability to reliably predict relative orientations of drug molecules within our series of antipicornavirus agents has severely limited the usefulness of available structure-activity data in the drug design process. A reported method of overlapping molecules has been evaluated to see if it could provide a solution to this problem. Although it initially succeeded remarkably well with a series of molecules whose bound X-ray structures were known, this success was shown to be only a function of the bound conformation of these molecules. Thus, this method did not provide a general solution to the problem at hand.
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Affiliation(s)
- G Diana
- Sterling Winthrop Pharmaceuticals Research Division, Rensselaer, NY 12144
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Abstract
Prescribing patterns of neuroleptic drugs in a population of about 3,700,000 inhabitants were analysed using all individual prescriptions delivered by the Italian National Health Service during 4 years (1986-1989). Data contained in a regional prescription database were analysed using an outpatient drug monitoring system (VIDEOFAR). The proportion of subjects receiving neuroleptics was about 1.3% of the entire population. During 1989, 20.2% of 52,716 observed subjects received multiple neuroleptic therapy. Haloperidol, the most frequently prescribed antipsychotic, was dispensed to 21.3% of the individuals as the only neuroleptic treatment. Consumption sharply increased with age and about 60% of patients receiving a prescription were women. Nonetheless, among the heavy users in the younger ages, the male-to-female ratio is significantly greater than one. Although the principal indications for neuroleptics are subacute or chronic clinical conditions, a surprisingly high proportion of subjects (ranging from 48% to 76% depending on the type of neuroleptic) received only one single prescription during 1989.
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Affiliation(s)
- R Raschetti
- Department of Epidemiology, National Health Institute, Rome, Italy
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Diana G, Scotti de Carolis A, Popoli P, Pezzola A, Sagratella S. Non-opioid antitussives potentiate some behavioural and EEG effects of N-methyl-D-aspartate channel blockers. Life Sci 1993; 52:1547-57. [PMID: 7683364 DOI: 10.1016/0024-3205(93)90055-8] [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: 01/26/2023]
Abstract
The effects of the non-opioid oral antitussives dextromethorphan (DM) and caramiphen (CP) were tested against the behavioural and EEG effects elicited by the N-methyl-D-aspartate (NMDA) antagonists dizocilpine (MK 801) and phencyclidine (PCP) in rats and mice. PCP (1.25-10 mg/kg i.p.) induced a dose-dependent increase/decrease of the locomotor/exploratory activity of mice. DM (25-50 mg/kg i.p.) and MK 801 (0.125-0.250 mg/kg i.p.) induced an increase of the locomotor/exploratory activity of mice, while CP (25-50 mg/kg i.p.) did not produce such an effect. CP (12.5 mg/kg i.p.) and DM (12.5 mg/kg i.p.) significantly potentiated the effects of PCP (1.25 mg/kg i.p.) and MK 801 (0.062 mg/kg i.p.) in the open field test in mice. In rats, PCP (1.25-10 mg/kg i.p.) induced three dose-dependent EEG stages: 1) increase of the cortical desynchronization periods; 2) increase of the amplitude of cortical background activity; 3) appearance of cortical slow wave-spike complexes. Even though DM (up to 100 mg/kg i.p.) only induced PCP-like EEG stage 1 by itself, and CP (up to 50 mg/kg i.p.) did not affect basal cortical EEG activity, these drugs, at the doses of 30-50 mg/kg i.p., potentiated all the EEG effects induced by PCP. These data support the view of an interaction between non-opioid antitussives and non-competitive NMDA antagonists.
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Affiliation(s)
- G Diana
- Pharmacology Department, Istituto Superiore di Sanità, Roma, Italy
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Spila Alegiani S, Diana G, Raschetti R. Neuroleptic prescribing in the community in Rome from 1986 to 1989. Pharmacol Res 1992. [DOI: 10.1016/1043-6618(92)91105-p] [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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Abstract
Binding of [3H]Ro 5-4864 to mitochondrial membrane preparations of rat cerebral cortex was measured after repeated (5 days) IV administration of diazepam (10 mg/kg daily) and clonazepam (2.5 mg/kg daily). The B(max) value for [3H]Ro 5-4864 was significantly reduced in rats treated with diazepam (-49%) but not in those treated with clonazepam. These findings suggest the involvement of peripheral-type binding sites in the development of rapid tolerance to the sedative effects of benzodiazepines. A downregulation of [3H]Ro 5-4864 (-65%) was also observed after repeated administration of Ro 5-4864 (4 mg/kg daily), thus confirming that this compound behaves as an agonist at its own recognition sites.
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Affiliation(s)
- G Diana
- Laboratorio di Farmacologia, Istituto Superiore di Sanità, Roma, Italy
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