LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 39

Search options

  1. Article ; Online: Fate mapping and scRNA sequencing reveal origin and diversity of lymph node stromal precursors.

    Lenti, Elisa / Genovese, Luca / Bianchessi, Silvia / Maurizio, Aurora / Sain, Simona Baghai / di Lillo, Alessia / Mattavelli, Greta / Harel, Itamar / Bernassola, Francesca / Hehlgans, Thomas / Pfeffer, Klaus / Crosti, Mariacristina / Abrignani, Sergio / Evans, Sylvia M / Sitia, Giovanni / Guimarães-Camboa, Nuno / Russo, Vincenzo / van de Pavert, Serge A / Garcia-Manteiga, Jose Manuel /
    Brendolan, Andrea

    Immunity

    2022  Volume 55, Issue 4, Page(s) 606–622.e6

    Abstract: Lymph node (LN) stromal cells play a crucial role in LN development and in supporting adaptive immune responses. However, their origin, differentiation pathways, and transcriptional programs are still elusive. Here, we used lineage-tracing approaches and ...

    Abstract Lymph node (LN) stromal cells play a crucial role in LN development and in supporting adaptive immune responses. However, their origin, differentiation pathways, and transcriptional programs are still elusive. Here, we used lineage-tracing approaches and single-cell transcriptome analyses to determine origin, transcriptional profile, and composition of LN stromal and endothelial progenitors. Our results showed that all major stromal cell subsets and a large proportion of blood endothelial cells originate from embryonic Hoxb6
    MeSH term(s) Endothelial Cells/metabolism ; Lymph Nodes ; Sequence Analysis, RNA ; Single-Cell Analysis ; Stromal Cells ; Transcription Factors/metabolism
    Chemical Substances Transcription Factors
    Language English
    Publishing date 2022-03-30
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1217235-2
    ISSN 1097-4180 ; 1074-7613
    ISSN (online) 1097-4180
    ISSN 1074-7613
    DOI 10.1016/j.immuni.2022.03.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Speckle tracking echocardiography: A new approach to myocardial function.

    Sitia, Simona / Tomasoni, Livio / Turiel, Maurizio

    World journal of cardiology

    2010  Volume 2, Issue 1, Page(s) 1–5

    Abstract: Echocardiography is the most common diagnostic method for assessing cardiac function but some limitations affect this technique. Until now, visual assessment of wall motion and thickening has allowed only a subjective evaluation of myocardial function ... ...

    Abstract Echocardiography is the most common diagnostic method for assessing cardiac function but some limitations affect this technique. Until now, visual assessment of wall motion and thickening has allowed only a subjective evaluation of myocardial function and requires long-term training. Recently, new echocardiographic techniques have been introduced to evaluate myocardial mechanics. Tissue Doppler imaging (TDI) technique is limited by angle-dependency such that only deformation along the ultrasound beam can be derived from velocities, while myocardium deforms simultaneously in three dimensions. Speckle tracking echocardiography (STE) is a more recent technique that provides a global approach to left ventricular myocardial mechanics, giving information about the three spatial dimensions of cardiac deformation. In this editorial, we describe the physical and pathophysiological concepts of STE, discussing the differences compared to TDI and underlining the pitfalls of this new technique.
    Language English
    Publishing date 2010-11-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2573665-6
    ISSN 1949-8462 ; 1949-8462
    ISSN (online) 1949-8462
    ISSN 1949-8462
    DOI 10.4330/wjc.v2.i1.1
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Role of cardiovascular imaging in systemic autoimmune diseases.

    Sitia, Simona / Gianturco, Luigi / Tomasoni, Livio / Turiel, Maurizio

    World journal of cardiology

    2010  Volume 2, Issue 8, Page(s) 237–242

    Abstract: Systemic autoimmune diseases are characterized by an excess of cardiovascular (CV) morbidity and mortality compared to the general population, mainly due to chronic inflammation that promotes the development of endothelial dysfunction and enhanced ... ...

    Abstract Systemic autoimmune diseases are characterized by an excess of cardiovascular (CV) morbidity and mortality compared to the general population, mainly due to chronic inflammation that promotes the development of endothelial dysfunction and enhanced atherosclerosis. Early diagnosis of silent CV involvement is mandatory to improve the long term prognosis of these patients and CV imaging provides valuable information as a reliable diagnostic tool. Transthoracic echocardiography, with several applications (e.g. coronary flow reserve evaluation, tissue Doppler imaging, speckle tracking and the transesophageal approach), represents a first line evaluation, in association with biomarkers of endothelial dysfunction, such as asymmetric dimethylarginine. Nuclear medicine provides useful information on myocardial perfusion. The aim of this editorial is to provide a brief but complete review of the diagnostic tools available for screening and follow up of CV involvement in systemic autoimmune diseases.
    Language English
    Publishing date 2010-11-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2573665-6
    ISSN 1949-8462 ; 1949-8462
    ISSN (online) 1949-8462
    ISSN 1949-8462
    DOI 10.4330/wjc.v2.i8.237
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Atypical IgM on T cells predict relapse and steroid dependence in idiopathic nephrotic syndrome.

    Colucci, Manuela / Carsetti, Rita / Rosado, Maria Manuela / Cascioli, Simona / Bruschi, Maurizio / Candiano, Giovanni / Corpetti, Giorgia / Giardino, Laura / Serafinelli, Jessica / Giannone, Chiara / Ghiggeri, Gian Marco / Rastaldi, Maria Pia / Sitia, Roberto / Emma, Francesco / Vivarelli, Marina

    Kidney international

    2019  Volume 96, Issue 4, Page(s) 971–982

    Abstract: The clinical heterogeneity of idiopathic nephrotic syndrome in childhood may reflect different mechanisms of disease that are as yet unclear. Here, we evaluated the association between an atypical presence of IgM on the surface of T cells (T-cell IgM) ... ...

    Abstract The clinical heterogeneity of idiopathic nephrotic syndrome in childhood may reflect different mechanisms of disease that are as yet unclear. Here, we evaluated the association between an atypical presence of IgM on the surface of T cells (T-cell IgM) and the response to steroid therapy in a total of 153 pediatric patients with idiopathic nephrotic syndrome in different phases of disease. At disease onset, T-cell IgM median levels were significantly elevated and predictive of risk of relapse in 47 patients. They were also significantly increased comparing 58 steroid-dependent to 8 infrequently relapsing and 14 frequently relapsing patients, especially during relapse, whereas they were within the normal range in 7 genetic steroid-resistant patients. T-cell IgM in vivo was not affected by the amount of total circulating IgM, nor by concomitant acute infections or oral immunosuppression. However, it was affected by rituximab treatment in 21 steroid-dependent patients. By in vitro experiments, elevated T-cell IgM was not influenced by total circulating IgM levels or by the presence of other circulating factors, and there was no distinctive antigen-specificity or atypical IgM polymerization. Rather, we found that increased T-cell IgM correlates with reduced IgM sialylation, which influences T-cell response to steroid inhibition and T-cell production of podocyte-damaging factors. Thus, the atypical presence of IgM on the surface of T cells may predispose a subset of steroid-sensitive pediatric patients with idiopathic nephrotic syndrome to a poor response to steroid therapy since disease onset.
    MeSH term(s) Adolescent ; Child ; Child, Preschool ; Drug Resistance/genetics ; Drug Therapy, Combination/methods ; Female ; Follow-Up Studies ; Glucocorticoids/pharmacology ; Glucocorticoids/therapeutic use ; Humans ; Immunoglobulin M/analysis ; Immunoglobulin M/immunology ; Immunoglobulin M/metabolism ; Infant ; Male ; Nephrotic Syndrome/blood ; Nephrotic Syndrome/drug therapy ; Nephrotic Syndrome/genetics ; Nephrotic Syndrome/immunology ; Podocytes ; Prospective Studies ; Recurrence ; Rituximab/pharmacology ; Rituximab/therapeutic use ; Sialic Acids/metabolism ; T-Lymphocytes/immunology ; T-Lymphocytes/metabolism ; Treatment Outcome
    Chemical Substances Glucocorticoids ; Immunoglobulin M ; Sialic Acids ; Rituximab (4F4X42SYQ6)
    Language English
    Publishing date 2019-05-07
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 120573-0
    ISSN 1523-1755 ; 0085-2538
    ISSN (online) 1523-1755
    ISSN 0085-2538
    DOI 10.1016/j.kint.2019.04.006
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Speckle tracking echocardiography

    Simona Sitia / Livio Tomasoni / Maurizio Turiel

    World Journal of Cardiology, Vol 2, Iss 1, Pp 1-

    A new approach to myocardial function

    2010  Volume 5

    Abstract: Echocardiography is the most common diagnostic method for assessing cardiac function but some limitations affect this technique. Until now, visual assessment of wall motion and thickening has allowed only a subjective evaluation of myocardial function ... ...

    Abstract Echocardiography is the most common diagnostic method for assessing cardiac function but some limitations affect this technique. Until now, visual assessment of wall motion and thickening has allowed only a subjective evaluation of myocardial function and requires long-term training. Recently, new echocardiographic techniques have been introduced to evaluate myocardial mechanics. Tissue Doppler imaging (TDI) technique is limited by angle-dependency such that only deformation along the ultrasound beam can be derived from velocities, while myocardium deforms simultaneously in three dimensions. Speckle tracking echocardiography (STE) is a more recent technique that provides a global approach to left ventricular myocardial mechanics, giving information about the three spatial dimensions of cardiac deformation. In this editorial, we describe the physical and pathophysiological concepts of STE, discussing the differences compared to TDI and underlining the pitfalls of this new technique.
    Keywords Myocardial function ; Speckle tracking echocardiography ; Tissue Doppler imaging ; Diseases of the circulatory (Cardiovascular) system ; RC666-701 ; Specialties of internal medicine ; RC581-951 ; Internal medicine ; RC31-1245 ; Medicine ; R ; DOAJ:Cardiovascular ; DOAJ:Medicine (General) ; DOAJ:Health Sciences
    Subject code 610
    Language English
    Publishing date 2010-01-01T00:00:00Z
    Publisher Baishideng Publishing
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  6. Article ; Online: Role of cardiovascular imaging in systemic autoimmune diseases

    Simona Sitia / Luigi Gianturco / Livio Tomasoni / Maurizio Turiel

    World Journal of Cardiology, Vol 2, Iss 8, Pp 237-

    2010  Volume 242

    Abstract: Systemic autoimmune diseases are characterized by an excess of cardiovascular (CV) morbidity and mortality compared to the general population, mainly due to chronic inflammation that promotes the development of endothelial dysfunction and enhanced ... ...

    Abstract Systemic autoimmune diseases are characterized by an excess of cardiovascular (CV) morbidity and mortality compared to the general population, mainly due to chronic inflammation that promotes the development of endothelial dysfunction and enhanced atherosclerosis. Early diagnosis of silent CV involvement is mandatory to improve the long term prognosis of these patients and CV imaging provides valuable information as a reliable diagnostic tool. Transthoracic echocardiography, with several applications (e.g. coronary flow reserve evaluation, tissue Doppler imaging, speckle tracking and the transesophageal approach), represents a first line evaluation, in association with biomarkers of endothelial dysfunction, such as asymmetric dimethylarginine. Nuclear medicine provides useful information on myocardial perfusion. The aim of this editorial is to provide a brief but complete review of the diagnostic tools available for screening and follow up of CV involvement in systemic autoimmune diseases.
    Keywords Systemic autoimmune disease ; Rheumatoid arthritis ; Cardiovascular involvement ; Echocardiography ; Coronary flow reserve ; Cardiac magnetic resonance ; Computed tomography ; Coronary angiography ; Speckle tracking ; Diseases of the circulatory (Cardiovascular) system ; RC666-701 ; Specialties of internal medicine ; RC581-951 ; Internal medicine ; RC31-1245 ; Medicine ; R ; DOAJ:Cardiovascular ; DOAJ:Medicine (General) ; DOAJ:Health Sciences
    Subject code 610
    Language English
    Publishing date 2010-08-01T00:00:00Z
    Publisher Baishideng Publishing
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  7. Article ; Online: Aetiology and antibiotic resistance patterns of urinary tract infections in the elderly: a 6-month study.

    De Vecchi, Elena / Sitia, Simona / Romanò, Carlo Luca / Ricci, Cristian / Mattina, Roberto / Drago, Lorenzo

    Journal of medical microbiology

    2013  Volume 62, Issue Pt 6, Page(s) 859–863

    Abstract: Urinary tract infections (UTIs) are a common cause of bacteraemia in the elderly and are associated with a high probability of hospitalization. Despite the impact of UTIs on health status and quality of life, a limited number of studies have evaluated ... ...

    Abstract Urinary tract infections (UTIs) are a common cause of bacteraemia in the elderly and are associated with a high probability of hospitalization. Despite the impact of UTIs on health status and quality of life, a limited number of studies have evaluated their aetiology in this population. This study aimed to evaluate the microbial aetiology and pattern of susceptibility of bacteria causing UTIs in the elderly. For this purpose, a retrospective cohort study of elderly residents (n = 472, aged >65 years) in 14 nursing homes in Milan (Italy) and its province was performed. Globally, 393 micro-organisms from 328 samples were isolated: Escherichia coli was the most prevalent (44.8 %), followed by Proteus mirabilis (20.4 %), Providencia spp. (8.9 %), Klebsiella spp. (6.4 %) and Pseudomonas aeruginosa (4.6 %). Enterococci were the most frequently isolated Gram-positive organisms (7.4 %). Almost all Enterobacteriaceae were susceptible to nitrofurantoin, carbapenems and amikacin. Extended-spectrum β-lactamases were detected in 42.1 % of isolates. The most active antibiotics against P. aeruginosa were colistin, amikacin and piperacillin/tazobactam. All Gram-positive organisms were susceptible to glycopeptides and linezolid, and 90 % were susceptible to nitrofurantoin. Fluoroquinolones showed a limited activity against all the tested micro-organisms. Escherichia coli remains the major micro-organism responsible for UTIs in older people, although to a lesser extent than in a younger population. The high rates of resistance observed in this study make careful use of antibiotics advisable to limit further development of resistance.
    MeSH term(s) Aged ; Aged, 80 and over ; Anti-Bacterial Agents/pharmacology ; Cohort Studies ; Drug Resistance, Bacterial ; Enterobacteriaceae/classification ; Enterobacteriaceae/drug effects ; Enterobacteriaceae/enzymology ; Enterobacteriaceae/isolation & purification ; Enterobacteriaceae Infections/epidemiology ; Enterobacteriaceae Infections/microbiology ; Female ; Humans ; Italy/epidemiology ; Male ; Microbial Sensitivity Tests ; Nursing Homes/statistics & numerical data ; Retrospective Studies ; Urinary Tract Infections/epidemiology ; Urinary Tract Infections/microbiology ; beta-Lactamases/biosynthesis
    Chemical Substances Anti-Bacterial Agents ; beta-Lactamases (EC 3.5.2.6)
    Language English
    Publishing date 2013-03-08
    Publishing country England
    Document type Journal Article
    ZDB-ID 218356-0
    ISSN 1473-5644 ; 0022-2615
    ISSN (online) 1473-5644
    ISSN 0022-2615
    DOI 10.1099/jmm.0.056945-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Diagnosis of cardiac involvement in systemic autoimmune diseases.

    Turiel, Maurizio / Sitia, Simona / Atzeni, Fabiola / Sarzi-Puttini, Piercarlo

    Expert review of clinical immunology

    2007  Volume 3, Issue 6, Page(s) 839–843

    Language English
    Publishing date 2007-11
    Publishing country England
    Document type Editorial
    ZDB-ID 2274260-8
    ISSN 1744-8409 ; 1744-666X
    ISSN (online) 1744-8409
    ISSN 1744-666X
    DOI 10.1586/1744666X.3.6.839
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Detection of preclinical impairment of myocardial function in rheumatoid arthritis patients with short disease duration by speckle tracking echocardiography.

    Sitia, Simona / Tomasoni, Livio / Cicala, Silvana / Atzeni, Fabiola / Ricci, Cristian / Gaeta, Maddalena / Sarzi-Puttini, Piercarlo / Turiel, Maurizio

    International journal of cardiology

    2012  Volume 160, Issue 1, Page(s) 8–14

    Abstract: Background: Subclinical cardiac involvement diagnosis is important for long term management of rheumatoid arthritis (RA) patients. Recently, 2D speckle tracking echocardiography (STE) allows non invasive and angle-independent measurement of left ... ...

    Abstract Background: Subclinical cardiac involvement diagnosis is important for long term management of rheumatoid arthritis (RA) patients. Recently, 2D speckle tracking echocardiography (STE) allows non invasive and angle-independent measurement of left ventricular (LV) dimensions and regional myocardial strain (ε). The aim of this study was to assess whether STE can be useful to detect subclinical cardiac involvement in RA patients.
    Methods: We studied 22 RA patients (10 M, 12 F, aged 46 ± 12 years) without clinical evidence of coronary artery disease (CAD) and 20 healthy controls matched for age and sex by STE. LV end-systolic longitudinal and radial ε from apical 4-chamber view were analyzed using available software (QLAB 6.0).
    Results: Standard echo and Doppler parameters did not differ between the 2 groups. Tissue Doppler Imaging (TDI) showed a significant reduction of S', E' and E'/A' ratio from the basal septum and lateral mitral annulus in RA patients. LV end-systolic radial and longitudinal ε of basal-lateral, basal- and mid-septal, mid-lateral and apical segments were significantly reduced compared to controls.
    Conclusions: Our data indicate that LV end-systolic radial and longitudinal ε are reduced in RA patients without CAD despite normal standard echo. Non invasive evaluation of LV function by STE appears to be useful to detect subclinical cardiac involvement in comparison to conventional 2D echoDoppler, representing a promising new modality to follow-up RA patients for cardiac involvement.
    MeSH term(s) Arthritis, Rheumatoid/complications ; Arthritis, Rheumatoid/physiopathology ; Echocardiography/methods ; Echocardiography, Doppler ; Female ; Humans ; Male ; Myocardial Contraction ; Risk Assessment ; Ventricular Dysfunction, Left/diagnostic imaging ; Ventricular Dysfunction, Left/etiology ; Ventricular Function, Left
    Language English
    Publishing date 2012-09-20
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 779519-1
    ISSN 1874-1754 ; 0167-5273
    ISSN (online) 1874-1754
    ISSN 0167-5273
    DOI 10.1016/j.ijcard.2011.03.012
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Rapamycin-sensitive signals control TCR/CD28-driven Ifng, Il4 and Foxp3 transcription and promoter region methylation.

    Tomasoni, Romana / Basso, Veronica / Pilipow, Karolina / Sitia, Giovanni / Saccani, Simona / Agresti, Alessandra / Mietton, Flore / Natoli, Gioacchino / Colombetti, Sara / Mondino, Anna

    European journal of immunology

    2011  Volume 41, Issue 7, Page(s) 2086–2096

    Abstract: The mammalian target of rapamycin (mTOR) controls T-cell differentiation in response to polarizing cytokines. We previously found that mTOR blockade by rapamycin (RAPA) delays the G1-S cell cycle transition and lymphocyte proliferation. Here, we report ... ...

    Abstract The mammalian target of rapamycin (mTOR) controls T-cell differentiation in response to polarizing cytokines. We previously found that mTOR blockade by rapamycin (RAPA) delays the G1-S cell cycle transition and lymphocyte proliferation. Here, we report that both mTOR complex 1 and mTOR complex 2 are readily activated following TCR/CD28 engagement and are critical for early expression of Ifng, Il4 and Foxp3, and for effector T cell differentiation in the absence of polarizing cytokines. While inhibition of mTOR complex 1 and cell division were evident at low doses of RAPA, inhibition of mTOR complex 2, Ifng, Il4 and Foxp3 expression, and T-cell polarization required higher doses and more prolonged treatments. We found that while T-bet and GATA3 were readily induced following TCR/CD28 engagement, administration of RAPA delayed their expression, and interfered with the loss of DNA methylation within Ifng and Il4 promoter regions. In contrast, RAPA prevented activation-dependent DNA methylation of the Foxp3 promoter favoring Foxp3 expression. As a result, RAPA-cultured cells lacked immediate effector functions and instead were enriched for IL-2+ cells. We propose that mTOR-signaling, by timing the expression of critical transcription factors and DNA methylation of proximal promoter regions, regulates transcriptional competence at immunologically relevant sites and hence lymphocyte differentiation.
    MeSH term(s) Animals ; CD28 Antigens/metabolism ; CD4-Positive T-Lymphocytes/immunology ; CD4-Positive T-Lymphocytes/metabolism ; Cell Differentiation ; Cells, Cultured ; Cytokines/metabolism ; DNA Methylation ; Forkhead Transcription Factors/genetics ; Forkhead Transcription Factors/metabolism ; GATA3 Transcription Factor/biosynthesis ; Interferon-gamma/genetics ; Interferon-gamma/metabolism ; Interleukin-2/biosynthesis ; Interleukin-4/genetics ; Interleukin-4/metabolism ; Lymphocyte Activation ; Mechanistic Target of Rapamycin Complex 1 ; Mice ; Mice, Inbred BALB C ; Multiprotein Complexes ; Polymerase Chain Reaction ; Promoter Regions, Genetic ; Proteins/metabolism ; Signal Transduction ; Sirolimus/pharmacology ; T-Box Domain Proteins/biosynthesis ; TOR Serine-Threonine Kinases/metabolism ; Transcription, Genetic
    Chemical Substances CD28 Antigens ; Cytokines ; Forkhead Transcription Factors ; Foxp3 protein, mouse ; GATA3 Transcription Factor ; Gata3 protein, mouse ; Interleukin-2 ; Multiprotein Complexes ; Proteins ; T-Box Domain Proteins ; T-box transcription factor TBX21 ; Interleukin-4 (207137-56-2) ; Interferon-gamma (82115-62-6) ; TOR Serine-Threonine Kinases (EC 2.7.1.1) ; mTOR protein, mouse (EC 2.7.1.1) ; Mechanistic Target of Rapamycin Complex 1 (EC 2.7.11.1) ; Sirolimus (W36ZG6FT64)
    Language English
    Publishing date 2011-07
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 120108-6
    ISSN 1521-4141 ; 0014-2980
    ISSN (online) 1521-4141
    ISSN 0014-2980
    DOI 10.1002/eji.201041130
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top