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Abstract
Two processing methods of fMRI data are proposed: vector orthogonalization and Fisher transformation of correlation coefficients (cc) distribution. The former is based on orthogonalization of vectors V (time course of signal intensity) and R (noise) to make V independent from R. The latter is based on Fisher transformation of cc distribution. From this distribution, by usual statistical tests, it is possible to detect the values of the cc that are significantly different from the mean in order to select activated pixels.
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Pelliccioli G, Parnetti L, Chiarini P, Floridi P, Campanella S, Guercini G, Leone F. Riferimenti neuroradiologici nella diagnostica differenziale delle demenze dell'età avanzata. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/197140099600900415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Allo scopo di fornire un contributo nella diagnostica delle demenze dell'età avanzata abbiamo valutato con risonanza magnetica i due reperti di maggiore interesse nell'invecchiamento cerebrale, volumetria ippocampale e lesioni iperintense della sostanza bianca e dei nuclei della base, in 12 pazienti affetti da malattia di Alzheimer (AD), in 9 da demenza vascolare (VD), in 12 con Age Associated Memory Impairment (AAMI), entità clinica di riscontro relativamente frequente nell'anziano su cui non esistono ancora pareri univoci, e in 9 soggetti di controllo di analoga fascia di età. I gruppi AD e AAMI sono risultati indistinguibili, in quanto entrambi hanno presentato una significativa riduzione del volume ippocampale rispetto agli altri gruppi ed una presenza di iperintensità della sostanza bianca analoga ai controlli. Nel gruppo VD al contrario la presenza di iperintensità della sostanza bianca, distinte dalla parete ventricolare, è risultata significativamente superiore rispetto a tutti gli altri gruppi; analogo andamento è stato osservato anche per le iperintensità dei nuclei della base ed infratentoriali. Le iperintensità periventricolari si sono invece dimostrate reperto meramente associato all'età. Questi risultati sembrano indicare che un esame RM, basato sulla combinazione di uno studio volumetrico ippocampale e di una valutazione semiquantitativa delle lesioni iperintense, offre fondamentali elementi «in positivo» nella diagnostica differenziale delle demenze. In particolare la AD e la VD sono ben caratterizzate e l'AAMI sembra essere una fase precoce di AD piuttosto che un'entità a se stante.
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Affiliation(s)
| | - L. Parnetti
- Istituto di Gerontologia e Geriatria, Università degli Studi; Perugia
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Stipa G, Luzzati A, Scotto G, Chiarini P, Floridi P. 97. Ilium chondromyxoid fibroma misdiagnosed as radiculopathy during pregnancy. Clin Neurophysiol 2015. [DOI: 10.1016/j.clinph.2014.10.116] [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: 11/25/2022]
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Tambasco N, Belcastro V, Sarchielli P, Floridi P, Pierguidi L, Menichetti C, Castrioto A, Chiarini P, Parnetti L, Eusebi P, Calabresi P, Rossi A. A magnetization transfer study of mild and advanced Parkinson’s disease. Eur J Neurol 2010; 18:471-7. [PMID: 20722713 DOI: 10.1111/j.1468-1331.2010.03184.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- N Tambasco
- Clinica Neurologica, Azienda Ospedaliera - Università di Perugia, Italy.
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Palumbo B, Lupattelli M, Pelliccioli GP, Chiarini P, Moschini TO, Palumbo I, Siepi D, Buoncristiani P, Nardi M, Giovenali P, Palumbo R. Association of 99mTc-MIBI brain SPECT and proton magnetic resonance spectroscopy (1H-MRS) to assess glioma recurrence after radiotherapy. Q J Nucl Med Mol Imaging 2006; 50:88-93. [PMID: 16557208] [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: 05/08/2023]
Abstract
AIM The aim of this study was to compare 99mTc-MIBI brain SPECT and proton magnetic resonance spectroscopy (1H-MRS) findings and to evaluate their association. METHODS Both exams were performed on 30 glioma patients, previously operated and treated with radiotherapy, having MRI doubtful between recurrence and radiotherapy effects. SPECT images were acquired 15 minutes after radiopharmaceutical administration with a dual-head gamma camera. T1/B1 uptake ratio was calculated between a tumor ROI (T1) and a normal mirror symmetric ROI (B1) and T2/B2 ratio was obtained between a ROI in the hottest neoplastic part (T2) and a normal mirror symmetric ROI (B2). 1H-MRS was performed using a 1.5 T system equipped with a spectroscopy package. SPECT and 1H-MRS data were compared with histology after new surgery or with follow-up. RESULTS SPECT and 1H-MRS showed recurrence in 18 patients (confirmed by biopsy, coinciding only in 17 cases) and were negative in 10 (1 false negative). SPECT and 1H-MRS disagreed in 2 cases of recurrence (1 diagnosed by brain SPECT, 1 by 1H-MRS). T1/B1 ratio mean value (4.26+/-2.5) was significantly lower than T2/B2 (4.93+/-2.81; P<0.001). SPECT and 1H-MRS sensitivity in detecting recurrence was 90%, specificity 100%, accuracy 93%, negative predictive value (NPV) 83% and positive predictive value (PPV) 100%; the associated exams sensitivity was 95%, specificity 100%, accuracy 96.6%, NPV 90.9%, PPV 100%. CONCLUSIONS Brain SPECT and 1H-MRS have equivalent values of diagnostic parameters in differentiating tumor recurrence and radiation effects, and their association might provide additional information.
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Affiliation(s)
- B Palumbo
- Nuclear Medicine Section, Department of Radiological Sciences, University of Perugia, Perugia, Italy.
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Tambasco N, Pelliccioli GP, Chiarini P, Montanari GE, Leone F, Mancini ML, Paciaroni M, Gallai V. Magnetization transfer changes of grey and white matter in Parkinson's disease. Neuroradiology 2003; 45:224-30. [PMID: 12687305 DOI: 10.1007/s00234-002-0925-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [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: 08/28/2002] [Accepted: 11/25/2002] [Indexed: 11/28/2022]
Abstract
Since the attempt to evidence structural brain damage in Parkinson's disease (PD) by conventional magnetic resonance imaging (MRI) is usually disappointing, we have investigated whether the magnetization transfer ratio (MTR) can reflect changes in grey and white matter of PD patients. MTR was quantified in 44 regions of interest (ROIs) in both grey and white matter of 11 non-demented PD patients, ranging from 2 to 4 on the Hoehn and Yahr Scale, and eight age-matched healthy subjects. MTR differences between patients and controls were found in the supratentorial white matter and in the brainstem. In particular, lower MTR values were found in the paraventricular white matter of PD patients (p<0.05) while no differences were observed in corpus callosum, frontal, parietal, occipital lobes or centrum semiovalis. Lower MTR values were found in substantia nigra (p<0.001), red nucleus (p<0.05) and pons (p<0.05) of the patient group. No differences were discovered in basal ganglia and thalamus. These findings suggest that MTR measurements in the paraventricular white matter and brainstem may help to recognize a marker for probable PD.
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Affiliation(s)
- N Tambasco
- Department of Neuroscience, University of Perugia, via Enrico dal Pozzo, 06126 Perugia, Italy.
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Sarchielli P, Presciutti O, Tarducci R, Gobbi G, Alberti A, Pelliccioli GP, Chiarini P, Gallai V. Localized (1)H magnetic resonance spectroscopy in mainly cortical gray matter of patients with multiple sclerosis. J Neurol 2002; 249:902-10. [PMID: 12140676 DOI: 10.1007/s00415-002-0758-5] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.7] [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: 10/26/2022]
Abstract
The brain water fraction (R), the brain water transverse relaxation time (T2), the atrophy index (alpha) and the absolute concentration of the principal brain metabolites (NAA, Cho and Cr) were measured by localized proton magnetic resonance spectroscopy in the occipito-parietal cortex (mainly gray matter) of 15 relapsing-remitting (R-R) multiple sclerosis (MS) patients, 15 secondary progressive (SP) MS patients and 8 healthy subjects. Significantly lower values of N-acetylaspartate (NAA), creatine (Cr) and the NAA/Cr ratio in the occipito-parietal cortex were detected in SP MS patients than in R-R MS and control subjects (p < 0.01). Moreover, MS patients showed shorter T2 water relaxation times and reduced brain water fraction compared with controls. Higher atrophy indices were also detected in the mainly occipito-parietal gray matter of MS patients, particularly in those with the progressive form. These findings suggest that the pathological process in MS is not limited to either white matter lesions or normal-appearing white matter but extends into the cortical gray matter (occipito-parietal), particularly in the progressive form of the disease. This can involve changes in neural metabolism or neural shrinkage and neuron loss. The significant increase in atrophy indices could be the expression of the relatively higher cerebrospinal fluid signal from the occipito-parietal cortex, even in the absence of obvious cortical atrophy.
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Affiliation(s)
- P Sarchielli
- Neurologic Clinic, Neuroscience Department, Policlinico Monteluce, Via E. Dal Pozzo, 06126 Perugia, Italy.
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Sarchielli P, Pelliccioli GP, Tarducci R, Chiarini P, Presciutti O, Gobbi G, Gallai V. Magnetic resonance imaging and 1H-magnetic resonance spectroscopy in amyotrophic lateral sclerosis. Neuroradiology 2001; 43:189-97. [PMID: 11305749 DOI: 10.1007/s002340000472] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.7] [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: 11/25/2022]
Abstract
We aimed to increase confidence in the combined use of MRI and proton MR spectroscopy (1H-MRS) in diagnosis of amyotrophic lateral sclerosis (ALS). We investigated 12 patients with ALS, seven definite and five probable, taking into account clinical measures of motor neuron function. On T2-weighted images we found high signal in the corticospinal tract in six and low signal in the primary motor cortex in seven of the 12 patients. Atrophy of the precentral gyrus was apparent in all the patients apart from one with probable ALS. Absolute quantification of cerebral metabolites using 1H-MRS demonstrated a significantly lower mean concentration of N-acetylaspartate (NAA) in the precentral gyrus of patients with probable and definite ALS (8.5 +/- 0.62) than in control subjects (10.4 +/- 0.71; P < 0.001). NAA concentration in primary motor cortex correlated with Norris scale scores (r = 0.30; P < 0.0001) but not with the ALS Functional Rating Scale score or disease duration. Significantly lower levels of NAA were detected in patients with low signal in the motor cortex than in those without (P < 0.01). Mean choline (Cho) and creatine (Cr) values did not differ between patients with ALS and controls.
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Affiliation(s)
- P Sarchielli
- Neurological Clinic, Policlinico Monte Luce, Perugia, Italy.
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Sarchielli P, Presciutti O, Pelliccioli GP, Tarducci R, Gobbi G, Chiarini P, Alberti A, Vicinanza F, Gallai V. Absolute quantification of brain metabolites by proton magnetic resonance spectroscopy in normal-appearing white matter of multiple sclerosis patients. Brain 1999; 122 ( Pt 3):513-21. [PMID: 10094259 DOI: 10.1093/brain/122.3.513] [Citation(s) in RCA: 110] [Impact Index Per Article: 4.4] [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: 11/14/2022] Open
Abstract
The aim of this research was to obtain an absolute quantification of the N-acetyl-aspartate, choline, creatine and phosphocreatine levels in normal-appearing white matter by means of 1H magnetic resonance spectroscopy in a group of multiple sclerosis patients (27 with the relapsing-remitting form and 13 with the secondary progressive form). These values were compared with those of a group of 12 age-matched healthy control subjects. A significant decrease in the N-acetyl-aspartate concentration was found in normal-appearing white matter of frontal and parietal brain areas in multiple sclerosis patients compared with the same areas in control subjects. This reduction was more evident in progressive patients. The decrease in the N-acetyl-aspartate concentration in normal-appearing white matter significantly correlated with the Expanded Disability Status and the lesional load. No significant change was found in the concentration of creatine or choline. This finding concurs with previous evidence of heterogeneity in the multiple sclerosis pathological process which is not confined to the lesions and involves not only myelin, but also axons, even in white matter which appears normal on MRI.
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Affiliation(s)
- P Sarchielli
- Neurologic Clinic, University of Perugia, Italy.
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Parnetti L, Lowenthal DT, Presciutti O, Pelliccioli GP, Palumbo R, Gobbi G, Chiarini P, Palumbo B, Tarducci R, Senin U. 1H-MRS, MRI-based hippocampal volumetry, and 99mTc-HMPAO-SPECT in normal aging, age-associated memory impairment, and probable Alzheimer's disease. J Am Geriatr Soc 1996; 44:133-8. [PMID: 8576501 DOI: 10.1111/j.1532-5415.1996.tb02428.x] [Citation(s) in RCA: 78] [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: 01/31/2023]
Abstract
OBJECTIVE To better understand how to differentiate the "in vivo" normal aging brain from pathological conditions, namely dementia of the Alzheimer type (DAT), by means of magnetic resonance imaging (MRI), single photon emission computerized tomography (SPECT), and proton magnetic resonance spectroscopy (1H-MRS), to show neuroanatomical, perfusional and neurochemical details, respectively. DESIGN 1H-MRS, MRI-based hippocampal volumetry and 99mTc-HMPAO SPECT were performed in healthy older subjects as well as patients suffering from age-associated memory impairment (AAMI) and dementia of Alzheimer type (DAT). SUBJECTS AND SETTING Eighteen subjects were selected from those referred to an outpatient clinic for diagnostic evaluation of cognitive impairment entered the study. Six patients fulfilled NINCDS-ADRDA diagnostic criteria for DAT, six subjects were affected by AAMI, and six cognitively healthy subjects, selected from among relatives of the patients, were defined as controls. METHODS The 1H-MRS and MRI studies were performed on a 1.5 Tesla NMR-imaging system equipped with a spectroscopy research package. SPECT scans were performed on a Gamma 11 computer system. FINDINGS 1H-MRS showed significantly lower N-acetylasparatate concentration in DAT and AAMI compared with controls. Conversely, mean inositol concentration was significantly higher in DAT than in controls, whereas AAMI subjects registered intermediate values. MRI measurements showed significantly reduced volumes of hippocampal formations in DAT and AAMI groups compared with controls. Finally, 99mTc-HMPAO SPECT showed a significant frontal, temporo-parietal, and occipital hypoperfusion in DAT patients only. CONCLUSIONS These findings support the hypothesis of a continuum among the three conditions studied, or at least between AAMI and DAT, where AAMI seems to be an early, monosymptomatic stage of Alzheimer disease. Accepting this view, it would be questionable to maintain the term "age-associated memory impairment" as a discrete entity.
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Affiliation(s)
- L Parnetti
- Sezione di Gerontologia e Geriatria, Università di Perugia, Italy
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Federici F, Bocciarelli G, Botti F, Bunori P, Chiarini P, Ito H, Nuccio M, Sabatini S. Behavioural patterns of compensation in the construction of subjective and objective relations in subjects blind from birth. ETHOL ECOL EVOL 1990. [DOI: 10.1080/08927014.1990.9525441] [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: 10/19/2022]
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Matassi L, Duranti R, Chiarini P, Strazzulla G, Piazzini M, Giovannoni S, Galletti R. [Reactivation of the allogenous component of experimental skin inflammation after exposure to ultraviolet rays]. Minerva Med 1983; 74:1011-6. [PMID: 6678391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The effects of U.V. radiation induced cutaneous erythema on an experimental inflammation focus in another part of the body have been studied. The skin inflammation caused by carbon dioxide snow was used as a model. The onset of erythema is followed by reactivation of the diminishing inflammation process. It is therefore deduced that such effects are transmitted humorally and that reactivation is caused by histamine circulation. Histamine is released locally from the U.V. induced erythema and, entering into the circulation, increased the permeability of the microvessels in the inflamed area. This sends inactive chemical mediators to the interstitial sector where the appropriate conditions for their activation exist.
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Galletti R, Chiarini P, Duranti R, Strazzulla G, Guazzelli R, Matassi L. [Reactivation of the algogenic component in experimental inflammation induced by histamine administration]. Minerva Med 1983; 74:869-74. [PMID: 6188999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The action of i.v. histamine on human skin inflammation experimentally induced with carbon dioxide snow in man is described. Histamine was injected when the skin reaction was on the wane to determine its possible reactivation of inflammation. Complete recrudescence of erythralgia was noted (reappearance of pain and of erythralgic halo, with a fresh spread of secondary hyperalgesia). It is felt that histamine was responsible. Its arrival to the reaction site through microvessels in a state of increased permeability during the remission of inflammation may be assumed to promote the passage of chemical mediators in the preactive stage from the vascular to the interstitial sector, and thus to pave the way for their activation.
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Chiarini P. [Interrelations among prostaglandins, cyclic AMP and calcium ions in regulation of the inflammatory process]. Recenti Prog Med 1980; 69:265-77. [PMID: 6256834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Chiarini P, Fini MT, Matassi L. [Calcitonin and somatic pain: study of the mechanism of the antalgic action of the hormone in osteoarthrosis]. Clin Ter 1979; 89:405-17. [PMID: 535320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Chiarini P, Matassi L, Fabrizi G. [Calcitonin and somatic pain: influence of the hormone on the algogenic component of experimental cantharidin-induced cutaneous inflammation]. Clin Ter 1978; 86:451-63. [PMID: 737969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Galletti R, Matassi L, Chiarini P, Corti F. The action of U.V. rays on experimental cutaneous inflammation induced by cantharidin. Inflamm Res 1976. [DOI: 10.1007/bf01973226] [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: 10/25/2022] Open
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Galletti R, Matassi L, Chiarini P, Corti F. Action of U.V. rays on the the experimental cutaneous inflammation induced by cantharidin. Adv Exp Med Biol 1976; 70:319-21. [PMID: 937137 DOI: 10.1007/978-1-4684-3267-1_38] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Chiarini P, Matassi L, Fabrizi De Biani G. [Effects of calcitonin on calcium-phosphorus homeostasis in patients with chronic renal insufficiency]. Minerva Nefrol 1975; 22:321-6. [PMID: 1223711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Galletti R, Matassi L, Chiarini P, De Biani GF, Duranti R. [Influence of indomethacin on the content of kininogen in the exudate from cutaneous inflammation induced by cantharidin in humans]. Clin Ter 1974; 70:531-7. [PMID: 4430173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Chiarini P, Matassi L. [Thyrocalcitonin in the picture of calcium homeostasis: physiopathological aspects and prospects of its therapeutic use]. Clin Ter 1972; 61:67-76. [PMID: 4340351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Galletti R, Chiarini P, Matassi L, Fabrizi G. [Analysis of the painful component in experimental inflammation induced with cantharidin]. Sperimentale 1971; 121:23-37. [PMID: 5172997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Chiarini P, Matassi L, Franchi F, Donnini L, Fabrizi G. [Effects of thyrocalcitonin on the renal excretion of phosphates in normal subjects during infusion with calcium]. Sperimentale 1970; 120:301-13. [PMID: 5527961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Galletti R, Matassi L, Chiarini P, Vecchiet L, Buzzelli G, Marra N. Plasma kinin activity in cirrhotic subjects. Sperimentale 1968; 118:253-61. [PMID: 4391955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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