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Biomedical subjects

R Lazzari

Publications and source records attributed to R Lazzari.

At least 55 records · Page 3Linked to original sources
PubMed1985

Can antigliadin antibody detect symptomless coeliac disease in children with short stature?

Duodenal biopsy and tests for antigliadin antibodies were done in 108 children with short stature unassociated with gastrointestinal symptoms. Other investigations for causes of growth failure were also carried out. In 88 patients, the cause of short stature could not be determined (group I). In 9 patients (8.3%) biopsy showed total villous atrophy, indicating probable coeliac disease (group II), while 7 patients had mild partial villous atrophy (group III). 4 patients (3.7%) had complete growth hormone deficiency. Antigliadin antibodies detected by immunofluorescence (IFL-AGA) were positive in 8 of the 9 group II patients. Symptomless coeliac disease is therefore a commoner cause of short stature than is hypopituitarism; by use of the IFL-AGA test it is possible to select patients for biopsy, thereby identifying most of the coeliac patients. If duodenal biopsies had been limited to IFL-AGA positive patients, 18 biopsies would have been carried out and coeliac disease would have been diagnosed in 8 of the 9 patients.

Adolescent↗
PubMed1985

Antibodies to gliadin detected by immunofluorescence and a micro-ELISA method: markers of active childhood and adult coeliac disease.

Antibodies to gliadin have been detected by immunofluorescence (IFL-AGA) and a micro-ELISA method (ELISA-AGA) in 45 out of 47 (96%) sera from patients with active childhood and adult coeliac disease. The two methods were more sensitive than R1-reticulin antibodies (R1-ARA) which were found only in 28 of the same patients (60%). R1-ARA were always negative in the 26 sera from patients with childhood coeliac disease and adult coeliac disease after gluten free diet, while IFL- and ELISA-AGA were respectively found in three (12%) and in four (15%) out of these patients. Moreover, while R1-ARA and IFL-AGA were strictly confined to coeliac disease. ELISA-AGA were occasionally found in patients with control diseases. These 'false positive' antibodies were all of IgG class and had low titres. In our experience IFL- and ELISA-AGA of IgA class were strictly confined to active childhood coeliac disease and adult coeliac disease. The detection of AGA is useful in monitoring the diet and in the follow up of coeliac disease. IFL- and ELISA-AGA, then, are to be preferred to R1-ARA for the screening of coeliac patients.

Adult↗
PubMed1985

Beta-blockers and psychic stress: a double-blind, placebo-controlled study of bopindolol vs lorazepam and butalbital in surgical patients.

One hundred patients scheduled for surgery participated in a randomized double-blind trial designed to evaluate the effects of acute treatment with two doses of bopindolol (1 mg:BP1;2 mg:BP2) in comparison with those of 2.5 mg lorazepam (LR), 75 mg butalbital (BT) and placebo (PL). Anxiety was evaluated by the STAI X1 questionnaire on the day before surgery, in the late afternoon (time 0: basal) and in the evening (time 1). At the same times patients were requested to play a game of manual skill called "Go Down". The next day, in the morning (time 2), the patients were given the same questionnaire and were asked a series of questions about their sleep and awakening. Mean anxiety scores were significantly increased over basal values at both time 1 and time 2 in the PL and LR groups and at time 2 in the BT group, but neither in the BP1 nor in the BP2 group. The time needed to perform the "Go Down" test was significantly shorter than the basal value for both BP groups and significantly longer for the BT group, while nonsignificant modifications occurred in the PL and LR groups. Positive effects were obtained in patients treated with BP, at both doses, on ease of "falling asleep", number of "night awakenings" and "reawakening mood" while LR and BT were mostly ineffective, except for BT on ease of "falling asleep". It was concluded that a beta-blocker such as bopindolol may be more effective than a benzodiazepine or a barbiturate for the prevention of anxiety symptoms induced by a clearly defined stress situation, such as awaiting a surgical operation.

Adrenergic beta-Antagonists↗
PubMed1985

Specificity of leucocyte migration inhibition test in coeliac disease. A reassessment using different gluten subfractions.

Production of leucocyte migration inhibition factor by peripheral blood leucocytes in response to challenge with gluten fractions has been proposed as a reliable in vitro test for the diagnosis of coeliac disease. We have performed the leucocyte migration inhibition test with two different gluten fractions, GFIII and B2, in untreated and treated coeliac patients, patients with other intestinal diseases (abnormal controls) and healthy controls, and evaluated the sensitivity, specificity and positive and negative predictability of the test for the diagnosis of coeliac disease. Using GFIII as antigen leucocyte migration was significantly inhibited, compared to healthy controls, not only in treated and untreated coeliacs but also in abnormal controls. Using B2 gluten subfraction as antigen only treated coeliacs and abnormal controls differed significantly from healthy controls. The elevated number of abnormal controls showing migration inhibition consistently affected the diagnostic value of the test, which did not vary using B2 subfraction instead of GFIII as antigen. Our study confirms previous observations of gluten sensitization, as detected by leucocyte migration inhibition, in coeliac patients but strongly questions the claim that coeliac disease can be diagnosed on the basis of a positive leucocyte migration inhibition test without the need for intestinal biopsy.

Adolescent↗
PubMed1984

Electrophysiological (CNV) analysis of personality traits under stress.

Contingent negative variation (CNV) recordings were performed in 55 healthy volunteers under stress condition (experimentally induced pain). A total of 20 subjects were included in the control group (no painful administration). In the tested group (n = 35) the painful stimulus was delivered before S1, between S2 and S1, and before S2. In the control group there were no changes in CNV parameters. Conversely, among the tested group a positive correlation was found between CNV values (whenever the painful stimulus was administered before S1 as well as before S2) and the highest scores in the State Trait Anxiety Inventory X 2 test. In addition, all individuals displayed the appearance of a positive deflection with a latency of about 300 ms from S2 when the experimental stress was given before S2. Furthermore, the postimperative negative variation (PINV) appeared in 13 out of 35 subjects. There was a strong correlation between the latter electrophysiological phenomenon and the Nowlis test. Our findings suggest that CNV study is useful for the investigation of personality traits in human beings under stress conditions.

Adult↗
PubMed1984

R1 reticulin antibodies: markers of celiac disease in children on a normal diet and on gluten challenge.

R1 reticulin antibodies were found in sera from patients with childhood celiac disease (CCD). Although the overall sensitivity of R1 in the diagnosis of CCD was relatively low (16/43 = 37%), when only those cases in an active phase of the disease were considered, the sensitivity increased (16/24 = 67%). In spite of its low sensitivity, the R1 assay did show a high degree of specificity, as this antibody was not found in children with post-enteritis syndrome or in healthy controls. R1 antibodies, when found in active CCD, always turned out to be positive when tested on human liver as substrate. While this fact did not enhance the sensitivity of the test, it strengthened its specificity, since R1, found in pathological conditions other than CCD, was nearly always negative on human tissue. Although the R1 reticulin antibody test cannot replace jejunal biopsy in the diagnosis of CCD, its assay, particularly on human liver as substrate, can be considered a useful tool in the screening of celiac patients.

Animals↗
PubMed1983

[Dihydroergotoxine mesylate in the treatment of senile cerebral insufficiency. Result of a long-term multicenter double-blind clinical trial with a placebo].

Many controlled double-blind clinical trials against placebo and other drugs have clearly demonstrated the activity of dihydroergotoxine mesylate (DHT) on some symptoms of chronic senile cerebral insufficiency (CSCI). In spite of this, there is still some controversy about the usefulness of DHT for treatment of CSCI, as it seems to be hard to transpose the results of these studies to treatment of a population with DHT. Trying to overcome this criticism, a multicenter double-blind, placebo-controlled long-term (1 year) clinical trial has been planned, using very simple criteria for patient selection and easy to use assessment devices. Fifty two centres distributed throughout Italy were invited and 40 took active part in the study. The present report deals with data collected for analysis on Aug. 31, 1982. On this date 559 patients entered the study and 458 were under treatment (229 on DHT 1.5 mg t.i.d. and 229 on placebo). 101 patients dropped out (48 on DHT and 53 on placebo). 388 patients (195 on DHT and 193 on placebo) had completed 6 months and 204 (111 on DHT and 93 on placebo) had completed 1 year of treatment. The data from patients who completed 6 and 12 months of treatment period were analyzed statistically using Student t tests for paired and unpaired data, the large number of patients being adequate protection against any non normality in the distribution of the data. Differences with 2P values of 0.01 or less were considered significant.(ABSTRACT TRUNCATED AT 250 WORDS)

Aged↗
PubMed1983

Influence of glucoregulation with continuous subcutaneous insulin infusion on nerve conduction velocity and beat to beat variation in diabetics.

Limited and contrasting data are available on the relationship between metabolic control and diabetic neuropathy. In eight type I diabetics peripheral and autonomic neuropathy were studied, first in conditions of poor metabolic control and then after one and three months during which an improved control of glycemic levels had been obtained by continuous subcutaneous insulin infusion. Autonomic neuropathy was investigated by evaluating beat to beat variation during deep breathing; peripheral neuropathy by measuring maximum motor conduction velocity of peroneal and median nerves and sensory conduction velocity of median nerve. Our data showed significant improvement of motor conduction velocity in both nerves studied, whilst sensory conduction velocity did not show any significant variation. The changes observed in beat to beat variation in five subjects with initially abnormal scores might reflect an improvement in autonomic nervous function, even if long-term studies are needed.

Adult↗
PubMed1983

Short stature and celiac disease: a relationship to consider even in patients with no gastrointestinal tract symptoms.

To determine the incidence of celiac disease in a group of nonselected children with short stature, duodenal biopsy was performed in 60 unselected children with short stature (below third centile) and absence of gastrointestinal tract symptoms. Examination revealed probable celiac disease in five children (8.3%). Analysis of the results of other tests that might possibly be considered as alternatives to biopsy (e.g., xylose test, antireticulin antibodies, gastrointestinal tract symptoms in the first two years of life, bone age, serum iron, iron load, triglyceride load) led us to conclude that no test or clinical measurement could have allowed us 100% certainty in making the correct diagnosis. None of the children with celiac disease had growth hormone deficiency. We conclude that asymptomatic celiac disease represents a cause of short stature that cannot be ignored, and that only by intestinal biopsy can all such patients be identified.

Adolescent↗
PubMed1983

Evaluation of a new latex agglutination test for detecting human rotavirus in faeces.

Four methods for detecting rotaviruses (latex agglutination, electron microscopy, immunofluorescence and ELISA) have been compared on 57 faecal samples from children with acute diarrhoea. Complete agreement among the four techniques was found in 38 samples. One sample was positive by ELISA and latex agglutination but negative by the other two. For all the other samples there was agreement among three of the techniques only. In a blocking ELISA test, samples positive by ELISA only, turned out to be falsely positive. Assuming true positive or negative for those samples for which at least three techniques were in agreement, electron microscopy, ELISA and latex agglutination were more sensitive (96 per cent) than immunofluorescence (84 per cent). Electron microscopy was the most specific (96.4 per cent), followed by immunofluorescence (92.9 per cent), ELISA (89.4 per cent) and latex agglutination (85.9 per cent).

Diarrhea↗
PubMed1983

Post-traumatic headache: neuropsychological and clinical aspects.

Seventy patients suffering from post-traumatic headache were studied. Pain characteristics, personality and intellectual functions were assessed to be related to cranial trauma. No evident signs of brain damage were present, but an impairment related to pain in personal adjustment and well-being reducing work and study capabilities was identified. A psychopathological condition described as anxiety with somatizations and conversion mechanisms was found and when compared with the psychopathological characteristics from a group of common headache patients no differences were obtained between the two groups. DSM III diagnostic possibilities for post-traumatic headache patients were discussed.

Adult↗
PubMed1982

Splenic function in childhood coeliac disease.

We measured splenic function using a simple, non-isotopic method in childhood coeliac disease. No patients were shown to have hyposplenism. This has important clinical and therapeutic implications.

Adolescent↗
PubMed1980

Adjective Check List self and ideal self correlates of MMPI profiles classified according to the Meehl-Dahlstrom rules.

Classified MMPI profiles of 61 male and 119 female Italian psychiatric outpatients as neurotic (N = 100), psychotic (N = 45), or indeterminate (N = 35) by means of the Meehl-Dahlstrom rules. These classifications were uninfluenced by age or sex. Real and ideal self descriptions on the Adjective Check List (ACL) also were obtained. Thirteen of the 24 ACL scales scored on the real protocols differentiated significantly (P < .05) among the three subgroups. Adequacy of personal adjustment, as inferred from these differences, was poorest for patients with "psychotic" MMPI profiles, next poorest for the indeterminates, and best for those in the neurotic category. Personal Adjustment was the lowest ACL scale for all three subgroups. Only one ideal self scale differentiated significantly among the three subgroups. Also, the ideal self profile for the total sample of 180 patients was almost perfectly correlated with that for a sample of 229 nonpatients. Descriptions of the real self appear to be related systematically and meaningfully to psychiatric status as indicated by the Meehl-Dahlstrom, rules, whereas descriptions of the ideal self are not associated with diagnosis.

Adult↗