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Biomedical subjects

M Corsi

Publications and source records attributed to M Corsi.

125 records · Page 7Linked to original sources
PubMedDate not supplied

Variations in plasma free radicals with topical aescin + essential phospholipids gel in venous hypertension: new clinical data.

The aim of this study was the evaluation of the effects of Aescin + essential phospholipids (AEPL) gel on plasma free radicals (PFRs). In this study, ten patients with venous hypertension, no ulcerations or infections, venous microangiopathy, and varicose veins were treated with topical AEPL applied in a standard protocol. AEPL was applied for 2 weeks, three times daily at the same skin region (perimalleolar internal region at defined distance from the medial malleolus and from the anterior edge of the tibia). In subjects with venous hypertension, PFR values were higher than 420 Carr units. After treatment, the values of PRF decreased to almost normal as an effect of the massage with AEPL gel. The decrease in value was observed in all treatment subjects. A ranking system indicates that the AEPL preparation is active in all subjects who have venous microangiopathy. The decrease in PFR value was greater than 30% in all treatment subjects (p < 0.05). The decrease in PFR can be considered an important indication of an improvement in skin perfusion, which protects the skin from deterioration and eventually from venous ulcerations. The evaluation of PFR is an important new physiologic parameter that can be associated with other noninvasive tests to study the microcirculation and its evolution and improvement with systemic or topical medical treatment.

Administration, Topical↗
PubMedDate not supplied

HR, 0-(beta-hydroxyethyl)-rutosides; (Venoruton): rapid relief of signs/symptoms in chronic venous insufficiency and microangiopathy: a prospective, controlled study.

The aim of this independent study was to demonstrate the rapidity of the clinical action of HR 0-(beta-hydroxyethyl)-rutosides, Venoruton (Novartis Consumer Health) in patients with chronic venous insufficiency (CVI). Two groups of patients with venous hypertension and microangiopathy were treated with HR (1 or 2 g/day, for 8 weeks). Twelve patients (age 56.4; range 44-66; M:F = 6:6) were included in group 1 (1 g/day) (moderate CVI and microangiopathy); 10 patients (age 57.4; range 42-67; M:F = 5:5) in group 2 (2 g/day) with more severe CVI and microangiopathy. Average ambulatory venous pressure (AVP) was 58.6 (range 50-65) with a refilling time (RT) shorter than 10 seconds. There were no significant differences in AVP and RT between the 2 groups, but the duration of the disease was longer in group 2: 3.5 years (SD 2.0) in group 1 and 6.4 years (SD 3.3) in group 2. All included subjects completed the study and no dropouts were observed. In both dose groups there was a progressive decrease in laser Doppler resting flux (RF), indicating improvement in microangiopathy and a significant decrease in capillary filtration (RAS) associated with a significant improvement in analogue scale line score (ASLS) and edema. Although the effect in the 2 g dose group was more rapid on the microcirculatory parameters with a significant effect on RF and RAS after 4 days (effect of 1 g per day after 8 days and 6 days, respectively), there was no difference in the time to onset of a significant clinical improvement (ie, the ASLS and the edema score): 4 days in both groups. Venous microangiopathy and edema were improved by the treatment with HR within a few days. The effects were visible with both dosages, in both severity groups.

Administration, Oral↗
PubMedDate not supplied

Prevention of edema and flight microangiopathy with Venoruton (HR), (0-[beta-hydroxyethyl]-rutosides) in patients with varicose veins.

The aim of this open study was the evaluation of the effects of HR (Venoruton) at a dose of 1 g/day on the prevention and control of flight microangiopathy and edema in subjects with varicose veins and moderate chronic venous insufficiency flying for more than 11 hours. Patients with varicose veins, edema, but without initial skin alterations or complications, were included. Measurements of skin laser Doppler (LDF) resting flux (RF) venoarteriolar response (VAR), ankle swelling (RAS), and edema were made within 12 hours before and within 3 hours after the flights. The resulting edema after the flights was evaluated with a composite edema score (analogue scale line). A group of 20 subjects was treated with HR (1 g/day, starting 2 days before the flight and 1 g for every 12 hours on day of travel). Another group of 18 subjects formed the control group. The length of the flights was between 11 and 13 hours; all seats were in coach class. Fifty patients were enrolled and 38 patients were evaluable at the end of the trial. The 2 groups (treatment and control) were comparable for age and sex distribution. The decrease in RF was significant in both groups with a higher flux at the end of the flight in the HR group (p < 0.05). The venoarteriolar response was decreased at the end of the flights; the decrease was lower in the HR group (p < 0.05). The increase in RAS and the edema score were significantly lower in the HR group. In conclusion HR is useful for reducing the level of microangiopathy and the increased capillary filtration and in controlling edema in patients with venous disease in long flights. The higher level of flux and VAR and the reduction in edema indicate a positive effect of HR on the microcirculation. This study confirms that HR prophylaxis is effective to control flight microangiopathy associated with edema.

Aerospace Medicine↗
PubMedDate not supplied

Improvement of diabetic microangiopathy with pycnogenol: A prospective, controlled study.

The aim of this study was to investigate the clinical efficacy of oral Pycnogenol (Horphag Research Ltd, United Kingdom) in patients with diabetic microangiopathy. Patients without a history of diabetic ulcerations were treated with Pycnogenol. Patients received oral Pycnogenol (50 mg capsules, 3 times daily for a total of 150 mg daily for 4 weeks). A group of 30 patients was included (severe microangiopathy); 30 comparable patients were observed as controls (no treatment during the observation period). All patients (age, 59 years; range, 55-68 years; male:female = 18:12) included in the treatment group completed the 4-week study. Also, all controls completed the follow-up period. There were no drop-outs. All included subjects had signs and symptoms of diabetic microangiopathy. The duration of diabetes-from the first signs/symptoms--was on average 7.5 years (SD = 3). After 4 weeks, microcirculatory and clinical evaluations showed a progressive decrease in skin flux at rest in the foot (indicating an improvement in the level of microangiopathy), a significant decrease in capillary filtration, and a significant improvement in the venoarteriolar response in all treated subjects. There were no visible effects in controls except a slight reduction in skin flux at rest in the foot. Treatment was well tolerated in both groups. In conclusion, this study confirms the clinical efficacy of Pycnogenol in patients with diabetic microangiopathy. The study indicates the clinical role of Pycnogenol in the management, treatment, and control of this common clinical problem. The treatment may be also useful to prevent diabetic ulcerations by controlling the level of microangiopathy.

Administration, Oral↗
PubMedDate not supplied

Rapid relief of signs/symptoms in chronic venous microangiopathy with pycnogenol: a prospective, controlled study.

The aim of this study was to investigate the clinical efficacy of oral Pycnogenol (Horphag Research Ltd, UK) in patients with severe chronic venous insufficiency. Patients with severe venous hypertension (chronic venous insufficiency, ankle swelling) and history of venous ulcerations were treated with Pycnogenol. Patients received oral Pycnogenol (50 mg capsules, 3 times daily for a total of 150 mg daily) for 8 weeks. A group of 21 patients was included in the treatment group and 18 equivalent patients were observed as controls (no treatment during the observation period). All 21 patients (age 53 years; range, 42-60 years; M:F=11:10) in the treatment group completed the 8-week study. Also the 18 controls completed the follow-up period. There were no drop-outs. The average ambulatory venous pressure was 59.3 (SD 7.2; range 50-68) with a refilling time shorter than 10 seconds (average 7.6; SD 3). There were no differences in ambulatory venous pressure or refilling time between the treatment and control patients. The duration of the disease-from the first signs/symptoms-was on average 5.7 years (SD 2.1). At 4 and 8 weeks, in all Pycnogenol-treated subjects, microcirculatory and clinical evaluations indicated a progressive decrease in skin flux, indicating an improvement in the level of microangiopathy; a significant decrease in capillary filtration; a significant improvement in the symptomatic score; and a reduction in edema. There were no visible effects in controls. In conclusion, this study confirms the fast clinical efficacy of Pycnogenol in patients with chronic venous insufficiency and venous microangiopathy. The study indicates the significant clinical role of Pycnogenol in the management, treatment and control of this common clinical problem. The treatment may be also useful to prevent ulcerations by controlling the level of venous microangiopathy.

Administration, Oral↗
PubMedDate not supplied

[3H]5,7-dichlorokynurenic acid recognizes two binding sites in rat cerebral cortex membranes.

Binding of [3H]5,7-dichlorokynurenic acid ([3H]DCKA), a competitive antagonist of the strychnine-insensitive glycine site of the N-methyl-D-aspartate (NMDA) receptor channel complex, was characterized in synaptic plasma membranes from rat cerebral cortex. Non linear curve fitting of [3H]DCKA saturation and homologous displacement isotherms indicated the existence of two binding sites: a specific, saturable, high affinity site, with a pKD value of 7.24 (KD = 57.5 nmol/l) and a maximum binding value (Bmax) of 6.9 pmol/mg of protein and a second site, with micromolar affinity. The pharmacological profile of both binding components was determined by studying the effect on [3H]DCKA and [3H]glycine binding of a series of compounds known to interact with different excitatory and inhibitory amino acid receptors. These studies confirmed the identity of the high affinity site of [3H]DCKA binding with the strychnine-insensitive glycine site of the NMDA receptor channel complex. 3-[2-(Phenylaminocarbonyl)ethenyl]-4,6-dichloroindole-2-carb oxylic acid sodium salt (GV 150526A), a new, high affinity, selective glycine site antagonist (1), was the most potent inhibitor of this component of binding (pKi = 8.24, Ki = 5.6 nmol/l). The low affinity component of [3H]DCKA binding was insensitive to the agonists glycine and D-serine and the partial agonist (+/-)-3-amino-1-hydroxy-2-pyrrolidone (HA 966), though recognised by glycine site antagonists. The precise nature of this second, low affinity [3H]DCKA binding site remains to be elucidated.

Animals↗
PubMedDate not supplied

[Treatment of inflammatory complications of permanent implanted pacemakers].

The Authors report an experience of 165 patients who underwent to implantation of artificial pacemaker from January 1973 to December 1974 and report 16 cases of infection. They consider many surgical and biologic factors that can have caused uprinsing of infection. The Authors report the therapeutic treatment the patients underwent and conclude that the best treatment is the implantation, to another seat, of new pacemaker.

Aged↗
PubMedDate not supplied

[Changes in the specific activity and content of free nucleotides and polyamines of the infarct and pre-infarct area of the revascularized dog heart].

Changes on specific radioactivity and levels of free nucleotides and polyamines in infarcted and borderline tissue of reperfused dog heart. The changes on specific radioactivity and levels of free nucleotides and polyamines, spermine and spermidine, of reperfused heart show a different behaviour of the anoxic myocardium. An increase of both specific activity and levels of free nucleotides and polyamines after 30 minutes of ischemia is observed. A longer period of anoxia (6 hours) causes a decreased synthesis and concentration of free nucleotides and polyamines. A remarkable recovery of specific activity of these compounds after reperfusion is noted. The borderline tissue shows a similar behaviour but with smaller changes. Therefore, in our experimental conditions, ischemia does not cause an irreversible alteration in protein synthesis mechanism of myocardial cells. In addition, the reperfusion may cause a recovery of biochemical mechanisms that control the functional capacity of the cell. The polyamine changes may postulate a central role of these amines in both anoxic and reperfused heart.

Animals↗
PubMedDate not supplied

[Computerized tomography in cochlear otosclerosis].

After a review on osseous labyrinthine modifications in cochlear otosclerosis, the authors report their experience, based on four patients, in CT evaluation of the disease. CT high resolution programs detect demineralization centres, which are distinctive of cochlear otosclerosis, at an early stage. CT must be considered a more informative investigation than multidirectional tomography.

Adult↗