476
|
Camici P, Ursini F, Galiazzo F, Bellitto L, Pelosi G, Marzilli M, L'Abbate A, Barsacchi R. Different respiratory activities of mitochondria isolated from the subendocardium and subepicardium of the canine heart. Basic Res Cardiol 1984; 79:454-60. [PMID: 6487238 DOI: 10.1007/bf01908146] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Mitochondria were prepared from the subendocardial and subepicardial layers of the canine left ventricle. The oxidation rates of palmitate, palmitoyl carnitine and pyruvate of the mitochondria obtained from the two cardiac layers were measured. The cytochrome content and the specific activities of different beta oxidation and Krebs cycle enzymes were also measured in the two mitochondrial populations. Mitochondria isolated from the ENDO layer showed significantly higher oxidation rates than mitochondria from the EPI layer for all the three substrates. No statistically significant differences in cytochrome c+c1 and a+a3 content were found in mitochondria isolated from the two regions. No significant transmural differences were found in fatty acyl CoA, L-3-hydroxy fatty acyl CoA, succinic and malic dehydrogenase specific activities, whilst isocitric dehydrogenase (NADP) specific activity was significantly higher in mitochondria isolated from the inner layer. In conclusion, the mitochondria isolated from the inner left ventricular layer of the canine heart show a higher oxidative capacity than subepicardial mitochondria. This difference could partly be explained by the higher specific activity of isocitric dehydrogenase in this layer. These properties of subendocardial mitochondria could represent a metabolic support for the greater contractile performance of this layer.
Collapse
|
477
|
Pala F, Sabato AF, Pelosi G, Magalini SI. [Identification of anesthetics and adjuvants by infrared and ultraviolet spectrophotometry]. CAHIERS D'ANESTHESIOLOGIE 1984; 32:29-31. [PMID: 6241496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
478
|
Proietti R, Pelosi G, Magalini SI, Della Morte F, De Angelis C. Effect of fructose-1,6-diphosphate on nitrogen loss of polytraumatized patients undergoing total parenteral nutrition. AGRESSOLOGIE: REVUE INTERNATIONALE DE PHYSIO-BIOLOGIE ET DE PHARMACOLOGIE APPLIQUEES AUX EFFETS DE L'AGRESSION 1983; 24:361-2. [PMID: 6419630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
479
|
Camici P, Barsacchi R, Bottigli U, Salvadori P, Pelosi G, Ursini F. Stone heart as a consequence of a peroxidative insult. J Mol Cell Cardiol 1983. [DOI: 10.1016/0022-2828(83)90873-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
480
|
Barsacchi R, Camici P, Bottigli U, Salvadori PA, Pelosi G, Maiorino M, Ursini F. Correlation between hydroperoxide-induced chemiluminescence of the heart and its function. BIOCHIMICA ET BIOPHYSICA ACTA 1983; 762:241-7. [PMID: 6830874 DOI: 10.1016/0167-4889(83)90077-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The isolated perfused rat heart emits a spontaneous ultraweak chemiluminescence. When the perfusion is stopped, light emission decreases, indicating the dependency of this phenomenon on aerobic metabolism. Emitted chemiluminescence was markedly enhanced following perfusion with 0.05 mM H2O2 or cumene hydroperoxide or tert-butyl hydroperoxide; substitution of O2 for N2 in the gassing mixture of the perfusion media significantly lowered photon emission. Lipid peroxidation, which is known to be associated with chemiluminescence, was evaluated by HPLC analysis of peroxidized and unperoxidized heart phosphatidylcholines. During hydroperoxide perfusion, coronary flow and heart rate progressively decreased, while lactic dehydrogenase was released after complete cardiac arrest. The resultant morphology of this damage corresponds to the so-called 'stone heart', a pattern already described in both human and experimental pathology.
Collapse
|
481
|
Volpi R, Coiro V, Salvi M, Pelosi G, Mancini P, Chiodera P. Effect of metoclopramide on serum growth hormone levels in cirrhotic men. J Endocrinol Invest 1983; 6:101-5. [PMID: 6863846 DOI: 10.1007/bf03350580] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Growth hormone (GH) secretory response to metoclopramide (MCP) administration was evaluated in 9 male patients with liver cirrhosis and in 6 normal controls. As expected, MCP did not modify serum GH concentrations in normal subjects. In contrast, a striking GH secretory response to MCP was observed in 5 out of 9 cirrhotics. In the other four patients serum GH levels did not show any variation after MCP. The different behavior between cirrhotic "responders" and "non responders" can not be interpreted on the basis of the medical history or the clinical and laboratory data. Three hypothesis are proposed: i) The effect of MCP could be promoted by estrogens and inhibited by androgens. ii) False neurochemical transmitters could affect dopaminergic system of some cirrhotics, allowing or inhibiting the GH response to MCP. iii) MCP could stimulate GH secretion by a serotonergic mechanism. These findings provide further evidence of a modification of the GH secretory pattern in patients with cirrhosis of the liver.
Collapse
|
482
|
Proietti R, Pelosi G, Santori R, Giammaria A, Arcangeli A, Sciarra M, Zanghi F. Nutrition in acute renal failure. Resuscitation 1983; 10:159-66. [PMID: 6302795 DOI: 10.1016/0300-9572(83)90003-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The nutritional value of regimes enriched with branched chain amino acids has been evaluated in 22 adult patients suffering from acute post-traumatic renal failure. The study was carried out for 12 days. The following data were recorded and compared daily: nitrogen balance, daily blood urea nitrogen (BUN), BUN/creatinine ratio, and plasma albumin levels. Also after 6 days of dialysis and nutritional support, the plasma medium molecular weight compounds (uremic toxins) were studied. It was concluded that: (a) the combined use of parenteral and oral nutrition appears most adequate in this type of patient; (b) the nitrogen intake should provide an essential amino acid/total nitrogen ratio of greater than or equal to 4 and a branched chain essential amino acid ratio of greater than or equal to 0.5; and (c) caution is still necessary in interpreting analyses of middle molecular weight compounds in this type of patient.
Collapse
|
483
|
Pelosi G, Proietti R, Magalini SI, Santori R, Giammaria A, Manni C. Anticatabolic properties of branched chain amino acids in trauma. Resuscitation 1983; 10:153-8. [PMID: 6302794 DOI: 10.1016/0300-9572(83)90002-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The anticatabolic properties of branched chain amino acids enriched protein solutions in 22 patients with multiple trauma have been evaluated. Nitrogen balance, nitrogen output, the daily change of blood urea nitrogen, plasma albumin and total protein levels were recorded daily. Each 2 days free amino acids and 3-methyl histidine urinary concentrations were measured. The results obtained in the study suggest that in trauma patients high ratios of essential amino acids/total nitrogen are needed and that amino acid solutions enriched in branched chain amino acids are most effective in preventing muscle catabolism and promoting protein synthesis.
Collapse
|
484
|
Cascino A, Cangiano C, Fiaccadori F, Ghinelli F, Merli M, Pelosi G, Riggio O, Rossi Fanelli F, Sacchini D, Stortoni M, Capocaccia L. Plasma and cerebrospinal fluid amino acid patterns in hepatic encephalopathy. Dig Dis Sci 1982; 27:828-32. [PMID: 7105954 DOI: 10.1007/bf01391377] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Plasma and cerebrospinal fluid amino acid levels wee measured in 12 cirrhotic patients in grade 0 hepatic encephalopathy and 17 in grade 3-4 hepatic encephalopathy. In 5 of these patients amino acid determinations were performed during the evolution of the encephalopathy. No correlation was found between the degree of hepatic encephalopathy and the plasma amino acid imbalance. In the CSF of cirrhotic patients without encephalopathy, a significant increase was found in nearly all amino acids, including those known to not easily cross the blood-brain barrier; this suggests the presence of a nonspecific modification of the blood-brain barrier permeability. In patients with severe hepatic encephalopathy, the further increase only in cerebrospinal fluid aromatic amino acids and methionine levels suggests the presence of a selective stimulation of the neutral amino acid transport system across the blood-brain barrier. Finally, the good correlation between glutamine and the sum of neutral amino acids found in the cerebrospinal fluid only in the presence of encephalopathy supports the hypothesis that brain glutamine may stimulate neutral amino acid transport across the blood-brain barrier.
Collapse
|
485
|
Pasetti GC, De Simoni M, Giuberti T, Pedretti G, Pelosi G. [Therapeutic effect of a new molecule, epomediol, in intrahepatic cholestasis]. LA CLINICA TERAPEUTICA 1982; 101:371-86. [PMID: 7105642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
486
|
Abballe C, De Cosmo G, De Angelis C, Pelosi G, Magalini SI. [Treatment of acid-base imbalance in acute post-traumatic renal insufficiency]. LA CLINICA TERAPEUTICA 1982; 101:297-305. [PMID: 7094551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
487
|
Pelosi G, Magalini SI, Proietti R, Sabato AF. [Sepsis in resuscitation. Incidence, epidemiology and prevention]. Minerva Anestesiol 1982; 48:267-74. [PMID: 7133434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
488
|
Guidi ML, Proietti R, Carducci P, Magalini SI, Pelosi G. The combined use of hyperbaric oxygen, antibiotics and surgery in the treatment of gas gangrene. Resuscitation 1981; 9:267-73. [PMID: 7335962 DOI: 10.1016/0300-9572(81)90002-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The clinical course and treatment of 21 critically ill patients suffering from gas gangrene are reported. Analysis of the results has underlined the importance of intensive care and hyperbaric management to prevent the evolution of disease and to improve patients' clinical conditions for surgical procedures.
Collapse
|
489
|
Pelosi G, Proietti R, Della Morte F, Magalini SI, Bondoli A. Decompression sickness: a medical emergency. Resuscitation 1981; 9:201-9. [PMID: 7291731 DOI: 10.1016/0300-9572(81)90040-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
490
|
Proietti R, Scrascia E, De Angelis C, Pelosi G, Bondoli A. [The intra-erythrocyte aminogram in acute renal insufficiency]. Minerva Anestesiol 1981; 47:525-9. [PMID: 6796908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
491
|
Fiaccadori F, De Simoni M, Ghinelli F, Magnani G, Pelosi G, Salvadori C. [Significance of the carcinoembryonic antigen (CEA) in the diagnosis of hepatopathies]. Minerva Med 1981; 72:1847-54. [PMID: 7254632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The significance of carcinoembryogenic antigen (CEA) is assessed as a way to obtaining a better definition of neoplasia of the liver and bile ducts, and the spotting of possible malignant degeneration in chronic diseases of the liver. The literature data on involvement of the liver and bile ducts in CEA metabolism are cited, and the results of a study of 419 patients with acute and chronic diseases of varying aetiology and severity, and benign or malignant obstructive icterus are presented. CEA measurements, while associated with a tendency towards high values in liver diseases with major functional damage, do not seem to be differentiating for cirrhosis and Ca-cirrhosis, or between benign and malignant icterus. Dependable diagnosis, therefore, depends on the inclusion of CEA in a battery of tests to be coupled with appraisal of the individual clinical and instrumental findings.
Collapse
|
492
|
L'Abbate A, Camici P, Trivella MG, Pelosi G. Regional myocardial glucose utilization assessed by (14C) deoxyglucose. Basic Res Cardiol 1981; 76:394-8. [PMID: 7283943 DOI: 10.1007/bf01908330] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
493
|
Fiaccadori F, Ghinelli F, Pedretti G, Pelosi G, Sacchini D, Spadini G. Negative nitrogen balance in cirrhotics. (A correct therapeutic approach). LA RICERCA IN CLINICA E IN LABORATORIO 1981; 11:259-68. [PMID: 7291872 DOI: 10.1007/bf02890532] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The aims of this study were: 1. the assessment of the nitrogen balance (NB) in both compensated and encephalopathic cirrhotics, 2. the evaluation of the efficacy of a new therapeutic approach: amino acid solutions enriched with branched chain (BCAA) but poor in aromatic (AAA) amino acids. Solutions containing only BCAA were also employed: 42 cirrhotics were divided into the following groups: 1st group (26 cases), cirrhosis without hepatic encephalopathy (HE); 2nd group (16 cases), cirrhosis with HE. Six patients (23%) in the 1st group showed a positive NB at the beginning; 20 (77%) were negative; 18 of them were fed an oral diet (0.8 g protein/kg/day; 35 cal/kg/day) as a result of which they were brought into a positive NB within 5 days (from - 7.38 +/- 0.95 to + 3.67 +/- 0.46 g N/24 h). In two cases the diet failed to give a positive NB, so it was replaced by a BCAA enriched solution infusion (NB raised from - 1.0 +/- 5.4 g N/24 h). Patients in the 2nd group were put on total parenteral nutrition (TPN); two cases receiving glucose alone achieved a positive NB only when BCAA enriched solutions were added (from - 4.0 to + 3.0 g N/24 h). Four patients treated for 3 days with BCAA alone did not achieve a positive NB; in these cases likewise, BCAA enriched solutions were added in order to achieve a positive NB (from - 0.8 to + 4.2 g N/24 h); all 14 cases treated from the beginning with glucose + BCAA enriched solutions became positive, on average, within 5 days (from - 4.82 +/- 0.89 to + 3.15 +/- 0.61 g N/24 h). In addition to the NB, other parameters (blood ammonia, BCAA/AAA ratio, blood urea, electroencephalograms) and clinical symptoms were beneficially influenced by these solutions.
Collapse
|
494
|
Proietti R, Pelosi G, Sabato AF, Della Morte F, Bondoli A. Plasma free amino acids in trauma: clinical and therapeutic implications. Resuscitation 1981; 9:107-11. [PMID: 6789429 DOI: 10.1016/0300-9572(81)90019-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
495
|
Bondoli A, Pelosi G, Sabato AF, Arcangeli A, Magalini SI. Plasma and cerebrospinal fluid acid-base balance and gas content in shock. Resuscitation 1981; 9:113-7. [PMID: 7255950 DOI: 10.1016/0300-9572(81)90020-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
496
|
L'Abbate A, Camici P, Trivella MG, Pelosi G, Davies GJ, Ballestra AM, Taddei L. Time-dependent response of coronary flow to prolonged adenosine infusion: doubling of peak reactive hyperaemic flow. Cardiovasc Res 1981; 15:282-6. [PMID: 7296586 DOI: 10.1093/cvr/15.5.282] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
UNLABELLED In 11 anaesthetised, Open chest dogs the time course and degree of the coronary vasodilating response to intracoronary adenosine infusion was assessed. Continuous adenosine infusion, at a rate of 2.5 to 13.5 mumol . min-1, produced rapid (15 to 30s) vasodilation of the same degree as that evoked by a 30 s period of ischaemia (reactive peak hyperaemia), a finding reported previously by others. However, continuing the infusion led to further coronary vasodilation, reaching a maximum 20 to 45 min from the beginning of the infusion and remaining constant for up to 2 h, independently of further increases in the dose. This late response produced, on average, vasodilatation twice as great as that observed during reactive hyperaemia and was not associated with any haemodynamic change or with the opening of arterio-venous shunts. THE RESULTS 1) suggest the existence of a double, time-dependent response of coronary receptor(s) to adenosine; 2) demonstrate, in the presence of a prolonged vasodilating stimulus, a possible increase in coronary blood flow to a degree far beyond that of post-ischaemic reactive peak flow, which is generally considered to be the maximal value of coronary blood flow that can be achieved.
Collapse
|
497
|
Fiaccadori F, Ghinelli F, Magnani G, Pelosi G, Sacchini D, Tedeschi F. [Clinico-pathogenetic problems and therapeutic approach in hepatic steatosis]. GIORNALE DI CLINICA MEDICA 1981; 62:326-38. [PMID: 7274622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
498
|
Pelosi G, Proietti R, Arcangeli A, Magalini SI, Bondoli A. Total parenteral nutrition infusate. An approach to its optimal composition in post-trauma acute renal failure. Resuscitation 1981; 9:45-51. [PMID: 6789427 DOI: 10.1016/0300-9572(81)90032-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
499
|
Pelosi G, Bracchi G, Orazio S, Cereda A. [Serum levels of beta-methyldigoxin and contractile efficiency of the myocardium evaluated with systolic polygraphy and determination of cardiac output]. Minerva Med 1981; 72:225-31. [PMID: 7010220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
0.3 mg/day betamethyldigoxin was given per os in three daily administrations to 8 healthy subjects, and 8 compensated and 8 decompensated heart patients. Prior to the treatment, and 6 hr after the last administration, blood digoxin values were determined radio-immunologically, together with cardiac output, systolic stroke volume, cardiac index (dilution of indocyanine green), and systolic time intervals, by simultaneous recording of the ECG, carotid pulse, and the phonocardiogram. No significant change in output, stroke volume and cardiac index was noted in the healthy subjects, whereas these parameters were distinctly improved in the decompensated patients. Changes in the systolic intervals after treatment were significant in all cases though there was no significant correlation with the blood digoxin levels reached. In particular, the healthy and compensated subjects displayed a reduction in the corrected electromechanical systole (delta Q-S2), the corrected pre-ejection period (delta PEP), the corrected left ventricular ejection time (delta LVET), and their ratio (PEP/LVET), whereas in the decompensated patients the picture differed to the extent that the LVET increased owing to an augment-systolic stroke volume, the other parameters being reduced. In the healthy subjects, the polygraphic data were normal prior to the treatment, while in the compensated patients delta PEP and the PEP/LVET ratio were enhanced, and the delta LVET was less than in the normal subjects. It is felt that recording of the systolic intervals may be regarded as a sound method, owing to its simplicity and its ability to demonstrate latent cardiac failure before haemodynamic changes appear. Simultaneous determination of serum digoxin and the polygraphic data, therefore, opens the way to the commencement of appropriate, safe and timely management of as yet non-decompensated heart patients.
Collapse
|
500
|
L'Abbate A, Camici P, Pelosi G, Trivella MG, Valli G, Marzilli M, Levantesi D, Taddei L. A new technique for multitracer macroscopic autoradiography. THE JOURNAL OF NUCLEAR MEDICINE AND ALLIED SCIENCES 1981; 25:27-33. [PMID: 7252593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|