14 results on '"RIGOLIO, ROBERTA"'
Search Results
2. Functional Magnetic Resonance Imaging Reveals Brain Cortex Remodeling in a Rat Model of Chronic Multiple Sclerosis
- Author
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Tambalo, S, Fiorini, S, Bontempi, P, Sbarbati, A, Pluchino, S, Marzola, P., RIGOLIO, ROBERTA, CAVALETTI, GUIDO ANGELO, MARMIROLI, PAOLA LORENA, Tambalo, S, Fiorini, S, Rigolio, R, Bontempi, P, Sbarbati, A, Cavaletti, G, Marmiroli, P, Pluchino, S, and Marzola, P
- Subjects
BIO/16 - ANATOMIA UMANA ,Experimental Autoimmune Encephalomyelitis, functional MRI, brain activation - Abstract
Experimental Autoimmune Encephalomyelitis (EAE) is a good model of Multiple Sclerosis in rodents. We have applied fMRI to invesigate the alteration in functional response in rats induced with EAE. Cortical activation is altered in EAE rat brain, compared to controls. fMRI showed an increase in the activated volume involving also the cortex ipsilateral and some extra-cortical areas at the observed time points. These results demonstrate brain cortex remodeling in EAE, a remakable feature of MS. The present model seems to be a relevant tool in preclinical MS studies.
- Published
- 2014
3. Neutrophil depletion during sensitization phase affects the chronic phase of Experimental Autoimmune Encephalomyelitis
- Author
-
RIGOLIO, ROBERTA, BALLARINI, ELISA, MEREGALLI, CRISTINA, CHIORAZZI, ALESSIA, SALA, BARBARA, AVEZZA, FEDERICA, CANTA, ANNALISA ROSANNA, CAROZZI, VALENTINA ALDA, CAVALETTI, GUIDO ANGELO, Magni, A, Crippa, L, Rigolio, R, Magni, A, Ballarini, E, Meregalli, C, Chiorazzi, A, Sala, B, Avezza, F, Canta, A, Carozzi, V, Crippa, L, and Cavaletti, G
- Subjects
BIO/16 - ANATOMIA UMANA ,Multiple sclerosis, xperimental autoimmune encephalomyelitis, innate immunity - Published
- 2012
4. Preventive treatment with anti-rat neutrophil serum affects the relapsing phase in Dark Agouti EAE rats
- Author
-
RIGOLIO, ROBERTA, BALLARINI, ELISA, MEREGALLI, CRISTINA, CHIORAZZI, ALESSIA, SALA, BARBARA, CAROZZI, VALENTINA ALDA, CANTA, ANNALISA ROSANNA, AVEZZA, FEDERICA, OGGIONI, NORBERTO, CAVALETTI, GUIDO ANGELO, Magni, A, Crippa, L, Rigolio, R, Magni, A, Ballarini, E, Meregalli, C, Chiorazzi, A, Sala, B, Carozzi, V, Canta, A, Avezza, F, Oggioni, N, Crippa, L, and Cavaletti, G
- Subjects
BIO/16 - ANATOMIA UMANA ,experimental autoimmune encephalomyelitis, innate immunity, neutrophil depletion - Published
- 2011
5. Anti-proliferative and anti-migratory effects of baicalin on cholangiocarcinoma cell line egi-1
- Author
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Rigolio, R, Cadamuro, M, Caramia, G, Malacrida, A, Maggioni, D, Foudah, D, Miloso, M, RIGOLIO, ROBERTA, CADAMURO, MASSIMILIANO, MALACRIDA, ALESSIO, MAGGIONI, DANIELE, FOUDAH, DANA, MILOSO, MARIAROSARIA, Rigolio, R, Cadamuro, M, Caramia, G, Malacrida, A, Maggioni, D, Foudah, D, Miloso, M, RIGOLIO, ROBERTA, CADAMURO, MASSIMILIANO, MALACRIDA, ALESSIO, MAGGIONI, DANIELE, FOUDAH, DANA, and MILOSO, MARIAROSARIA
- Abstract
Cholangiocarcinoma (CCA) is the second most frequent primary liver neoplasia. It mainly arises from the malignant transformation of biliary epithelial cells, although it might originate from either hepatic progenitor cells at the Hering canals or transformed hepatocytes. CCA is a highly aggressive tumor with extremely poor prognosis and limited therapeutic approaches. Baicalin (BA) is one of the main bioactive flavonoids identified in the Scutellaria Baicalensis Georgi root dried extract which is extensively used in the Chinese tra-ditional medicine. Together with the anti-inflammatory effect, the anti-neoplastic action is the most relevant BA property demonstrated on cancer cells of different origin. Being aware of the need of new therapeutic weapons for CCA treatment, we in-vestigated whether Baicalin could exert anti-proliferative and anti-migratory effect on EGI-1 cells, a highly metastatic CCA cell line derived from bile duct carcinoma. We first tested different BA concentrations (from 5 to 200µM) in limiting EGI-1 via-bility using MTT assay. After 24h and 48h treatment, 5 and 10µM BA had no effect while rising from 25µM to 200µM (i.e. 25,50,100 and 200µM) BA exerted a significant cell viability reduction already at 24h and increased after 48h BA expo-sure. This reduction well correlated with the adherent absolute cell number de-crease and it cannot be due to BA induced cell cycle impairment after neither 24 nor 48h treatment. We also evaluated the anti-migratory BA potential by a wound healing assay adding different BA concentrations (5, 25, 50,100 and 200µM) to the culture medium immediately after performing a wound on confluent cell cultures. All BA concen-trations but 5µM induced a significant reduction in the EGI-1 migration rate after 24h treatment. Moreover 25, 50 and 10µM BA showed similar migration inhibition extent at 24 and 48h whilst 200µM BA exerted a stronger inhibitory effect already after 24h exposure which increased with time in a significant w
- Published
- 2014
6. In Vitro and in Vivo Characterization of Bosutinib as Substrate of the Pglycoprotein Efflux Transporter
- Author
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Redaelli, S, Perini, P, Ceccon, M, Piazza, R, Rigolio, R, Boschelli, F, Giannoudis, A, GAMBACORTI PASSERINI, C, REDAELLI, SARA, PERINI, PIETRO, CECCON, MONICA, PIAZZA, ROCCO GIOVANNI, RIGOLIO, ROBERTA, GAMBACORTI PASSERINI, CARLO, Redaelli, S, Perini, P, Ceccon, M, Piazza, R, Rigolio, R, Boschelli, F, Giannoudis, A, GAMBACORTI PASSERINI, C, REDAELLI, SARA, PERINI, PIETRO, CECCON, MONICA, PIAZZA, ROCCO GIOVANNI, RIGOLIO, ROBERTA, and GAMBACORTI PASSERINI, CARLO
- Published
- 2014
7. La citofluorimetria a flusso nella caratterizzazione immunofenotipica dei linfociti in corso di Encefalite Autoimmune Sperimentale
- Author
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Biffi, A, CAVALETTI, GUIDO ANGELO, RIGOLIO, ROBERTA, Biffi, A, Cavaletti, G, and Rigolio, R
- Subjects
Encefalite Autoimmune Sperimentale (EAS), Lewis rat, linfociti CD4 e CD8 infiltranti, molecole di adesione, TCRVbeta8.2 ,BIO/16 - ANATOMIA UMANA - Abstract
L’Encefalite Autoimmune Sperimentale (EAS) è il principale modello animale impiegato nello studio dei meccanismi immunologici responsabili dello sviluppo della sclerosi multipla (SM). L’EAS viene generalmente indotta attivamente in diverse specie animali mediante la somministrazione di peptidi derivati da proteine espresse a livello del sistema nervoso centrale (SNC). L’EAS indotta nel ratto di Lewis rappresenta un eccellente modello per lo studio dei meccanismi immunologici cellulo-mediati responsabili dell’insorgenza della fase acuta della SM nella quale si instaura uno stato di infiammazione a livello del SNC, che compromette la trasmissione efficace del segnale lungo le fibre mieliniche. La EAS ha un andamento monofasico ed è caratterizzata da un decorso ben definito, contraddistinto dall’insorgenza dei primi segni clinici dopo 10 giorni dall’induzione della patologia. L’acme del processo patologico si registra dopo 14 giorni. Istologicamente si osserva la presenza di infiltrati monocellulari perivascolari a livello del SNC, prevalentemente composti da linfoidi CD4. Dopo 21 gironi dall’induzione, la malattia va incontro a remissione completa, e gli animali manifestano resistenza nei confronti di tentativi di reinduzione della malattia. Diversamente dall’uomo, nel modello di Lewis sono stati identificati i principali clonotipi di linfociti T che svolgono un ruolo centrale sviluppo della patologia. Tra questi, il più studiato è il clonotipo di linfociti T CD4 che esprime la subunità beta (β) 8.2 nella porzione variabile (V) del recettore delle cellule T (TCR). La letteratura in merito è basata per lo più su dati di biologia molecolare o immunoistochimica relativi alle cellule presenti nei linfonodi periferici o alle cellule infiltranti il SNC. Non sono attualmente presenti studi che caratterizzino la prevalenza dei linfociti TCR Vβ 8.2+ durante il decorso della EAS, soprattutto applicando metodiche relativamente veloci e accurate. Analogamente vi sono poche informazioni riguardo la cinetica e l’espressione delle molecole di adesione sulla superficie dei linfociti e responsabili dell’interazione con le pareti dei vasi e della migrazione nel parenchima tissutale. Di particolare rilievo per la extravasazione a livello del SNC sembra essere l’integrina alfa-4, riconosciuta da anticorpi diretto contro CD49d, che eterodimerizza con proteine della famiglia delle beta integrine (beta-1) originando molecole responsabili dell’adesione stabile alle pareti dei vasi sanguigni (VLA-4). Anche in questo caso sono poche le informazioni circa la modulazione dell’espressione di alfa-4 sui linfociti durante il decorso della malattia. Solamente Selmaj et al.1 hanno dimostrato un incremento nell’espressione di alpha-4 su splenociti di topo durante lo sviluppo dell’EAS indotta mediante trasferimento di cloni T encefalitogenici in topi sani. Scopo del nostro lavoro è stato quello di colmare, almeno in parte, le lacune concernenti la caratterizzazione del modello di EAS attivamente indotto nel ratto di Lewis. Ci siamo concentrati in particolare sulla frequenza dei linfociti T TCR Vβ8.2+ e sull’espressione della molecola di adesione alpha-4 su splenociti derivati da animali sacrificati all’insorgenza e al picco di EAS, nonché sulle cellule ottenute dal midollo di animali al picco di malattia.
- Published
- 2008
8. A new device to study ex-vivo the effects of extracorporeal photochemotherapy on the immune system: early experience in healthy controls and a multiple sclerosis patient
- Author
-
RIGOLIO, ROBERTA, CAVALETTI, GUIDO ANGELO, Perseghin, P, Petersson, J, Jonsson, S, Biffi, A, Cilio, CM, Rigolio, R, Perseghin, P, Petersson, J, Jonsson, S, Biffi, A, Cavaletti, G, and Cilio, C
- Subjects
BIO/16 - ANATOMIA UMANA ,Extracorporeal Photochemotherapy, peripheral blood cells, multiple sclerosis, T lymphocyte cytokine production - Abstract
See the attached pdf file
- Published
- 2007
9. Ex-vivo study of extracorporeal photochemotherapy effects on immune system: early experience in healthy controls and a multiple sclerosis patient
- Author
-
RIGOLIO, ROBERTA, CAVALETTI, GUIDO ANGELO, Perseghin, P, Petersson, J, Jonsson, S, Biffi, A, Cilio, C., Rigolio, R, Perseghin, P, Petersson, J, Jonsson, S, Biffi, A, Cavaletti, G, and Cilio, C
- Subjects
BIO/16 - ANATOMIA UMANA ,Extracorporeal Photochemotherapy, multiple sclerosis, T lymphocyte cytokine production - Abstract
Extracorporeal photochemotherapy (ECP) is a procedure effective in the treatment of several human T-cell mediated diseases. During ECP treatment the patient’s blood is processed by means of a cell separator to collect leukocytes (leukapheresis), mostly lymphocytes and monocytes (PBMC), which are then added with the photoactive drug 8-methoxypsoralen (8-MOP), exposed to ultraviolet-A light (UV-A) and reinfused into the patient. Even if the mechanisms of action of ECP remain elusive, it has been shown that it has an in-vivo immunomodulatory effect in experimental ellergic encephalomyelitis (EAE) and in a small pilot study in multiple sclerosis (MS) patients. It has been suggested that during ECP not only UV-A irradiation but also the environmental condition changes may be relevant, an aspect which has never been investigated in detail. Therefore, we developed a new bench device which reliably mimics ex-vivo the complete ECP cycle and we investigated the effect of 8-MOP, UV-A and their combination on the synthesis of IFN-gamma, IL-2 and TNF-alpha on healthy controls and a MS patient. PBMC were collected and treated with 8-MOP and/or UV-A under the same conditions used for the ECP therapy. PBMC were polyclonally stimulated with phorbol 12-myristate 13-acetate (PMA) and ionomycin in the presence of Brefeldin A (BFA) to prevent newly synthesized cytokine egression. Intracellular pro-inflammatory cytokines produced by activated T-lymphocytes were evaluated. We observed a significant decrease in activated CD4+ and CD8+ T-lymphocytes producing cytokines after UV-A irradiation and a further decrease in the presence of 8-MOP + UV-A. The decrease in cytokines production seemed to be both cytokine- and cell type-related. In fact TNF-alpha production was reduced to a lesser extent than IFN-gamma and IL-2 ones by both UV-A and the co-treatment, while CD4+ T-cells seemed to be more sensitive than CD8+ lymphocytes when IFN-gamma and IL-2 production was considered. Both T-cell population showed similar behaviour when TNF-alpha production was evaluated. 8-MOP and UV-A co-treatment affected T-lymphocytes activation after polyclonal stimulation and. reduced IFN-gamma, IL-2 and TNF-alpha production with different extent among the cytokines considered. Following this preliminary experience this ex-vivo protocol will be used to extend the determinations in the EAE model and to reproduce these observations in a larger series of healthy controls and MS patients.
- Published
- 2006
10. Neutrophil depletion during sensitization phase affects the chronic phase of Experimental Autoimmune Encephalomyelitis
- Author
-
Rigolio, R, Magni, A, Ballarini, E, Meregalli, C, Chiorazzi, A, Sala, B, Avezza, F, Canta, A, Carozzi, V, Crippa, L, Cavaletti, G, RIGOLIO, ROBERTA, BALLARINI, ELISA, MEREGALLI, CRISTINA, CHIORAZZI, ALESSIA, SALA, BARBARA, AVEZZA, FEDERICA, CANTA, ANNALISA ROSANNA, CAROZZI, VALENTINA ALDA, CAVALETTI, GUIDO ANGELO, Rigolio, R, Magni, A, Ballarini, E, Meregalli, C, Chiorazzi, A, Sala, B, Avezza, F, Canta, A, Carozzi, V, Crippa, L, Cavaletti, G, RIGOLIO, ROBERTA, BALLARINI, ELISA, MEREGALLI, CRISTINA, CHIORAZZI, ALESSIA, SALA, BARBARA, AVEZZA, FEDERICA, CANTA, ANNALISA ROSANNA, CAROZZI, VALENTINA ALDA, and CAVALETTI, GUIDO ANGELO
- Published
- 2012
11. Evaluation of brain activity changes occurring in an animal model for multiple sclerosis: a functional Magnetic Resonance Imaging study
- Author
-
Rigolio, R, Marmiroli, P, Cavaletti, G, RODRIGUEZ MENENDEZ, V, Fiorini, S, Tambalo, S, Marzola, P, RIGOLIO, ROBERTA, MARMIROLI, PAOLA LORENA, CAVALETTI, GUIDO ANGELO, RODRIGUEZ MENENDEZ, VIRGINIA, Marzola, P., Rigolio, R, Marmiroli, P, Cavaletti, G, RODRIGUEZ MENENDEZ, V, Fiorini, S, Tambalo, S, Marzola, P, RIGOLIO, ROBERTA, MARMIROLI, PAOLA LORENA, CAVALETTI, GUIDO ANGELO, RODRIGUEZ MENENDEZ, VIRGINIA, and Marzola, P.
- Abstract
Multiple Sclerosis (MS) is a chronic inflammatory demyelination disease of the central nervous system. It is characterized by blood brain barrier leakage during exacerbation phases and impairment in remyelination processes which are both detected by means of magnetic resonance imaging (MRI). Despite this technique is mainly used as diagnostic morphological tool for active and quiescent lesions, functional NMR (fMRI) may be used in MS patients to investigate the functional reorganization of brain cortex observed to overcome brain lesions. fMRI observations are already available in humans, but deeper knowledge on its usefulness might be gained using reliable animals models. By means of fMRI we investigated the brain plasticity in a chronic model of MS, i.e. Experimental Autoimmune Encephalomyelitis (EAE) in the Dark Agouti (DA) rat strain. Serial fMRI with somatosensory stimulation [1] and acquisitions were performed before, 30 and 60 days after EAE induction (dpi). Briefly electrical stimulation was delivered to the left forepaw during acquisition of MR images sensitive to Blood-Volume. A single stimulation protocol was composed of 30 images under rest condition and 10 images acquired during stimulation. After appropriate image analysis, performed using the FSL software package [2], the brain region activated by the applied stimulus was determined. Prior to EAE induction, electrical stimulation resulted in a localized response in the contralateral sensory motor cortex. Thirty and 60dpi, the activated area was greatly increased covering large regions of both contra and ipsilateral somatosensory cortex and extending also to extra-cortical regions. Our results show that DA EAE reproduces a remarkable findings observed in MS patients, i.e. the functional reorganization of motor cortex. It remains to be investigated whether this effect could represent an innovative platform for testing new therapeutic approaches for MS. References [1] Van Camp N, et al., NMR in Biomedicin
- Published
- 2012
12. Preventive treatment with anti-rat neutrophil serum affects the relapsing phase in Dark Agouti EAE rats
- Author
-
Rigolio, R, Magni, A, Ballarini, E, Meregalli, C, Chiorazzi, A, Sala, B, Carozzi, V, Canta, A, Avezza, F, Oggioni, N, Crippa, L, Cavaletti, G, RIGOLIO, ROBERTA, BALLARINI, ELISA, MEREGALLI, CRISTINA, CHIORAZZI, ALESSIA, SALA, BARBARA, CAROZZI, VALENTINA ALDA, CANTA, ANNALISA ROSANNA, AVEZZA, FEDERICA, OGGIONI, NORBERTO, CAVALETTI, GUIDO ANGELO, Rigolio, R, Magni, A, Ballarini, E, Meregalli, C, Chiorazzi, A, Sala, B, Carozzi, V, Canta, A, Avezza, F, Oggioni, N, Crippa, L, Cavaletti, G, RIGOLIO, ROBERTA, BALLARINI, ELISA, MEREGALLI, CRISTINA, CHIORAZZI, ALESSIA, SALA, BARBARA, CAROZZI, VALENTINA ALDA, CANTA, ANNALISA ROSANNA, AVEZZA, FEDERICA, OGGIONI, NORBERTO, and CAVALETTI, GUIDO ANGELO
- Published
- 2011
13. A new device to study ex-vivo the effects of extracorporeal photochemotherapy on the immune system: early experience in healthy controls and a multiple sclerosis patient.
- Author
-
Rigolio, R, Perseghin, P, Petersson, J, Jonsson, S, Biffi, A, Cavaletti, G, Cilio, C, RIGOLIO, ROBERTA, CAVALETTI, GUIDO ANGELO, Cilio, CM, Rigolio, R, Perseghin, P, Petersson, J, Jonsson, S, Biffi, A, Cavaletti, G, Cilio, C, RIGOLIO, ROBERTA, CAVALETTI, GUIDO ANGELO, and Cilio, CM
- Abstract
See the attached pdf file
- Published
- 2007
14. Ex-vivo study of extracorporeal photochemotherapy effects on immune system: early experience in healthy controls and a multiple sclerosis patient.
- Author
-
Rigolio, R, Perseghin, P, Petersson, J, Jonsson, S, Biffi, A, Cavaletti, G, Cilio, C, RIGOLIO, ROBERTA, CAVALETTI, GUIDO ANGELO, Cilio, C., Rigolio, R, Perseghin, P, Petersson, J, Jonsson, S, Biffi, A, Cavaletti, G, Cilio, C, RIGOLIO, ROBERTA, CAVALETTI, GUIDO ANGELO, and Cilio, C.
- Abstract
Extracorporeal photochemotherapy (ECP) is a procedure effective in the treatment of several human T-cell mediated diseases. During ECP treatment the patient’s blood is processed by means of a cell separator to collect leukocytes (leukapheresis), mostly lymphocytes and monocytes (PBMC), which are then added with the photoactive drug 8-methoxypsoralen (8-MOP), exposed to ultraviolet-A light (UV-A) and reinfused into the patient. Even if the mechanisms of action of ECP remain elusive, it has been shown that it has an in-vivo immunomodulatory effect in experimental ellergic encephalomyelitis (EAE) and in a small pilot study in multiple sclerosis (MS) patients. It has been suggested that during ECP not only UV-A irradiation but also the environmental condition changes may be relevant, an aspect which has never been investigated in detail. Therefore, we developed a new bench device which reliably mimics ex-vivo the complete ECP cycle and we investigated the effect of 8-MOP, UV-A and their combination on the synthesis of IFN-gamma, IL-2 and TNF-alpha on healthy controls and a MS patient. PBMC were collected and treated with 8-MOP and/or UV-A under the same conditions used for the ECP therapy. PBMC were polyclonally stimulated with phorbol 12-myristate 13-acetate (PMA) and ionomycin in the presence of Brefeldin A (BFA) to prevent newly synthesized cytokine egression. Intracellular pro-inflammatory cytokines produced by activated T-lymphocytes were evaluated. We observed a significant decrease in activated CD4+ and CD8+ T-lymphocytes producing cytokines after UV-A irradiation and a further decrease in the presence of 8-MOP + UV-A. The decrease in cytokines production seemed to be both cytokine- and cell type-related. In fact TNF-alpha production was reduced to a lesser extent than IFN-gamma and IL-2 ones by both UV-A and the co-treatment, while CD4+ T-cells seemed to be more sensitive than CD8+ lymphocytes when IFN-gamma and IL-2 production was considered. Both T-cell popula
- Published
- 2006
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