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Search Results: 1 - 10 of 14130 matches for " Andrea Bolognesi "
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Amiodarone-induced bronchiolitis obliterans organizing pneumonia in patient following percutaneous transluminal coronary angioplasty  [PDF]
Massimo Bolognesi, Diletta Bolognesi
Case Reports in Clinical Medicine (CRCM) , 2013, DOI: 10.4236/crcm.2013.29136
Abstract:

Background: Many patients are affected by idiopathicbronchiolitis obliterans organizing pneumonia (BOOP). There are several known causes of BOOP, and several systemic disorders have BOOP as an associated primary pulmonary lesion. Numerous agents including cytotoxic and noncytotoxic drugs have the potential to cause pulmonary toxicity. Descriptions of amiodarone-related BOOP continue to be reported throughout the world. Case Report: We reported a patient with original clinical presentation who developed recurrent sustained ventricular tachycardia (SVT) despite the presence of implantable cardioverter-defibrillator (ICD), hypoxaemia and interstitial pneumonitis in both lung bases. After percutaneous transluminal coronary angioplasty, he developed bronchiolitis obliterans organizing pneumonia (BOOP). Conclusions: To our knowledge, such complications after percutaneous coronary procedure in patients with amiodarone therapy for arrhythmia prophylaxis, are not very frequent in literature.

 

Misdiagnosis of Angina Pectoris Due to Severe Coronary Artery Disease: An Anecdotal Case  [PDF]
Massimo Bolognesi, Diletta Bolognesi
Case Reports in Clinical Medicine (CRCM) , 2014, DOI: 10.4236/crcm.2014.36073
Abstract:

Background: Misdiagnosis of angina pectoris is not uncommon in athletes. Physicians can fail to make a correct clinical diagnosis if they don’t have the skills and experience needed to recognize this disease. Case Report: This case report describes an exertional angina misdiagnosis due to a severe coronary artery disease in a 50-year-old male athlete initially examined by both a general practitioner and a cardiologist. The athlete subsequently underwent physical examination in a sports cardiology medicine center where diagnosis of angina pectoris caused by severe mono-vessel coronary artery disease was made, requiring an angioplasty with stenting. Conclusions: Although most of the severe symptoms in a heart attack are hard to miss, sometimes in athletes angina pectoris is not readily recognized. However, this is dangerous and can lead to the sudden death of the athlete. Diagnosis must be timely and accurate, in order for the patient to receive the best prognosis.

Unusual Presentation of Non-Hodgkin’s B-Cell Lymphoma with Unilateral Right Limb Lymphedema  [PDF]
Massimo Bolognesi, Diletta Bolognesi
Case Reports in Clinical Medicine (CRCM) , 2014, DOI: 10.4236/crcm.2014.311125
Abstract: Background: In clinical practice and setting of general practice it is common to see patients with leg edema. To correctly identify the etiology of the edema and then properly manage the cause is not always easy. The unilateral lymphedema of the lower limb has rarely been reported as an initial presentation for lymphoma, especially in females, usually without classic signs or symptoms, but often with inguinal lymphadenopathy or abdominal masses. Case Report: In this article, we report a rare case of unilateral lower limb edema in a healthy obese woman who complained about the appearance of the disease for several months and for whom deep vein thrombosis and other diseases had been excluded. The histological examination of the biopsy of an enlarged lymph node in the right groin, which was compressing the iliac and femoral vein, revealed the presence of B cell non-Hodgkin lymphoma with high-grade malignancy. Conclusions: A common challenge for primary care physicians is to determine the cause and find an effective treatment for leg edema of unclear etiology. Non-Hodgkin’s B-cell Lymphoma should be considered in the differential diagnosis in patients with unilateral leg edema when the swelling is chronic and deep venous thrombosis is promptly excluded.
Higgs at LHC
Sara Bolognesi,Giuseppe Bozzi,Andrea Di Simone
Physics , 2008, DOI: 10.1393/ncb/i2008-10537-3
Abstract: An overview of recent theoretical results on the Higgs boson and its discovery strategy at ATLAS and CMS will be presented, focusing on the main Higgs analysis effective with low integrated luminosity (less than 30 fb^-1).
Immunotoxins and Other Conjugates Containing Saporin-S6 for Cancer Therapy
Letizia Polito,Massimo Bortolotti,Manuela Pedrazzi,Andrea Bolognesi
Toxins , 2011, DOI: 10.3390/toxins3060697
Abstract: Ribosome-inactivating proteins (RIPs) are a family of plant toxins that permanently damage ribosomes and possibly other cellular substrates, thus causing cell death. RIPs are mostly divided in two types: Type 1 RIPs that are single-chain enzymatic proteins, and type 2 RIPs that consist of an active A chain (similar to a type 1 RIP) linked to a B chain with lectin properties. RIP-containing conjugates have been used in many experimental strategies against cancer cells, often showing great efficacy in clinical trials. Saporin-S6, a type 1 RIP extracted from Saponaria officinalis L. seeds, has been extensively utilized to construct anti-cancer conjugates because of its high enzymatic activity, stability and resistance to conjugation procedures, resulting in the efficient killing of target cells. This review summarizes saporin-S6-containing conjugates and their application in cancer therapy, considering in-vitro and in-vivo studies both in animal models and in clinical trials. The review is structured on the basis of the targeting of hematological versus solid tumors and on the antigen recognized on the cell surface.
Membrane Lipidome Reorganization Correlates with the Fate of Neuroblastoma Cells Supplemented with Fatty Acids
Andrea Bolognesi, Alexandros Chatgilialoglu, Letizia Polito, Carla Ferreri
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0055537
Abstract: Palmitic acid is known to be apoptotic for nervous cells but no data are available on membrane lipidome transformations occurring during its supplementation, although membrane lipids are clearly involved in the apoptotic signaling cascade. NB100 neuroblastoma cells were supplemented with palmitic acid and membrane fatty acids were isolated, derivatized and analysed by gas chromatography at defined time intervals. Parallely, cell viability, morphology, apoptosis, cPLA2 and caspase activations were checked. Interestingly, under 150 μM supplementation the incorporation of palmitic acid was accompanied by the specific release of arachidonic acid. This event was timely correlated with cPLA2 and caspases activations, and the time window of 60 minutes was envisaged for crucial membrane lipidome changes. The simultaneous addition of 50 μM oleic, 50 μM arachidonic and 150 μM palmitic acids to the cell cultures influenced membrane changes with suppression of caspase activation and maintenance of cell viability. These results highlight the role of the membrane asset with fatty acid remodeling and suggest the potential of lipid-based strategies for influencing cell response and fate in human diseases, such as neurodegenerative disorders or tumours.
A prominent crista terminalis associated with atrial septal aneurysm that mimics right atrial mass leading to atrial arrhythmias: a case report
Bolognesi Massimo,Bolognesi Diletta
Journal of Medical Case Reports , 2012, DOI: 10.1186/1752-1947-6-403
Abstract: Introduction The crista terminalis is a variant of normal anatomical structures within the right atrium that mimics an atrial mass on a transthoracic echocardiogram. Atrial septal aneurysm is a rare but well-recognized cardiac abnormality of uncertain clinical significance. The association between crista terminalis and atrial septal aneurysm is unusual but not completely casual. Both anatomical heart structures can lead to atrial arrhythmias. Case presentation This case report describes the accidental discovery during an echocardiographic examination of a 64-year-old Caucasian woman who had a left bundle branch block and palpitations. Conclusion The clinical relevance of this anatomical evidence in unknown. This was an occasional finding of transthoracic echocardiography, but in this case it is possible to assume its relationship with the occurrence of atrial arrhythmias, and also that computed tomography scan and cardiovascular magnetic resonance is mandatory to define the structure and function of these incidental findings.
High Resolution Crystal Structures of the Cerebratulus lacteus Mini-Hb in the Unligated and Carbomonoxy States
Francesca Germani,Alessandra Pesce,Andrea Venturini,Luc Moens,Martino Bolognesi,Sylvia Dewilde,Marco Nardini
International Journal of Molecular Sciences , 2012, DOI: 10.3390/ijms13078025
Abstract: The nerve tissue mini-hemoglobin from Cerebratulus lacteus (CerHb) displays an essential globin fold hosting a protein matrix tunnel held to allow traffic of small ligands to and from the heme. CerHb heme pocket hosts the distal TyrB10/GlnE7 pair, normally linked to low rates of O 2 dissociation and ultra-high O 2 affinity. However, CerHb affinity for O 2 is similar to that of mammalian myoglobins, due to a dynamic equilibrium between high and low affinity states driven by the ability of ThrE11 to orient the TyrB10 OH group relative to the heme ligand. We present here the high resolution crystal structures of CerHb in the unligated and carbomonoxy states. Although CO binds to the heme with an orientation different from the O 2 ligand, the overall binding schemes for CO and O 2 are essentially the same, both ligands being stabilized through a network of hydrogen bonds based on TyrB10, GlnE7, and ThrE11. No dramatic protein structural changes are needed to support binding of the ligands, which can freely reach the heme distal site through the apolar tunnel. A lack of main conformational changes between the heme-unligated and -ligated states grants stability to the folded mini-Hb and is a prerequisite for fast ligand diffusion to/from the heme.
Identification of the Molecular Site of Ivabradine Binding to HCN4 Channels
Annalisa Bucchi, Mirko Baruscotti, Marco Nardini, Andrea Barbuti, Stefano Micheloni, Martino Bolognesi, Dario DiFrancesco
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0053132
Abstract: Ivabradine is a specific heart rate-reducing agent approved as a treatment of chronic stable angina. Its mode of action involves a selective and specific block of HCN channels, the molecular components of sinoatrial "funny" (f)-channels. Different studies suggest that the binding site of ivabradine is located in the inner vestibule of HCN channels, but the molecular details of ivabradine binding are unknown. We thus sought to investigate by mutagenesis and in silico analysis which residues of the HCN4 channel, the HCN isoform expressed in the sinoatrial node, are involved in the binding of ivabradine. Using homology modeling, we verified the presence of an inner cavity below the channel pore and identified residues lining the cavity; these residues were replaced with alanine (or valine) either alone or in combination, and WT and mutant channels were expressed in HEK293 cells. Comparison of the block efficiency of mutant vs WT channels, measured by patch-clamp, revealed that residues Y506, F509 and I510 are involved in ivabradine binding. For each mutant channel, docking simulations correctly explain the reduced block efficiency in terms of proportionally reduced affinity for ivabradine binding. In summary our study shows that ivabradine occupies a cavity below the channel pore, and identifies specific residues facing this cavity that interact and stabilize the ivabradine molecule. This study provides an interpretation of known properties of f/HCN4 channel block by ivabradine such as the “open channel block”, the current-dependence of block and the property of "trapping" of drug molecules in the closed configuration.
Saporin-S6: A Useful Tool in Cancer Therapy
Letizia Polito,Massimo Bortolotti,Daniele Mercatelli,Maria Giulia Battelli,Andrea Bolognesi
Toxins , 2013, DOI: 10.3390/toxins5101698
Abstract: Thirty years ago, the type 1 ribosome-inactivating protein (RIP) saporin-S6 (also known as saporin) was isolated from Saponaria officinalis L. seeds. Since then, the properties and mechanisms of action of saporin-S6 have been well characterized, and it has been widely employed in the construction of conjugates and immunotoxins for different purposes. These immunotoxins have shown many interesting results when used in cancer therapy, particularly in hematological tumors. The high enzymatic activity, stability and resistance to conjugation procedures and blood proteases make saporin-S6 a very useful tool in cancer therapy. High efficacy has been reported in clinical trials with saporin-S6-containing immunotoxins, at dosages that induced only mild and transient side effects, which were mainly fever, myalgias, hepatotoxicity, thrombocytopenia and vascular leak syndrome. Moreover, saporin-S6 triggers multiple cell death pathways, rendering impossible the selection of RIP-resistant mutants. In this review, some aspects of saporin-S6, such as the chemico-physical characteristics, the structural properties, its endocytosis, its intracellular routing and the pathogenetic mechanisms of the cell damage, are reported. In addition, the recent progress and developments of saporin-S6-containing immunotoxins in cancer immunotherapy are summarized, including in vitro and in vivo pre-clinical studies and clinical trials.
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