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Galli F, Piroddi M, Bartolini D, Ciffolilli S, Buoncristiani E, Ricci G, Buoncristiani U. Blood thiol status and erythrocyte glutathione-S-transferase in chronic kidney disease patients on treatment with frequent (daily) hemodialysis. Free Radic Res 2013; 48:273-81. [DOI: 10.3109/10715762.2013.861901] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Ricci G, Piccinno V, Calamelli E, Giannetti A, Pession A. Latex-fruit syndrome in Italian children and adolescents with natural rubber latex allergy. Int J Immunopathol Pharmacol 2013; 26:263-8. [PMID: 23527732 DOI: 10.1177/039463201302600129] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Approximately 30-50 percent of individuals with natural rubber latex (NRL) allergy show an associated hypersensitivity to particular plant-derived foods, which has been defined "latex-fruit syndrome" (LFS). In our population of 22 patients with IgE-mediated NRL allergy we found a relevant prevalence (36 percent) of LFS, which resulted significantly higher in the group of patients with more severe clinical manifestations of NRL allergy than in patients with contact symptoms due to NRL (78 percent vs 8 percent; less than 0.005).
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Di Blasio A, Bucci I, Napolitano G, Melanzi S, Izzicupo P, Di Donato F, Tonizzo C, D'Angelo E, Ricci G, Ripari P. Characteristics of spontaneous physical activity and executive functions in postmenopause. Minerva Med 2013; 104:61-74. [PMID: 23392539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
AIM Executive functions are susceptible to age-related changes, and menopause has also been shown to be linked with their decline. The aim of the present study was to investigate the variables related to executive functions in postmenopausal women not involved in controlled dietary and physical exercise programs and without hormone-replacement therapy. METHODS Fifty-seven women (58.39 ±4.16 yr) were investigated for their medical history, blood lipids, insulin resistance (HOMA-IR), body composition, blood pressure, executive functions (Digit Span and Trail Making tests), maximal aerobic capacity, dietary habits, and spontaneous physical activity. RESULTS Cluster analysis performed on the basal data of the Digit Span scores and Trail Making tests identified two subgroups: Group A (N.=24) that showed better executive functions than Group B (N.=33). Although these subgroups differed across several variables of body composition, plasma lipids, dietary habits, spontaneous physical activity, aerobic fitness, and insulin resistance, logistic regression models showed B10m/die as the only predictive variable for subgroup membership. CONCLUSION In the absence of a physical exercise program, the knowledge of how spontaneous physical activity is organized (B10m/die) is important for executive functions of post-menopausal women. It is the specific moderate to intense physical activity characteristic of B10m/die, rather than generic physical activity, that seems to determine the maintenance or attainment of cognitive health through body movement.
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Dondi A, Ricci L, Neri I, Ricci G, Patrizi A. The switch from non-IgE-associated to IgE-associated atopic dermatitis occurs early in life. Allergy 2013; 68:259-60. [PMID: 23320563 DOI: 10.1111/all.12070] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Calamelli E, Ricci G, Pession A. Recent advances in diagnosis and therapy of allergic rhinitis and asthma in childhood. Eur Ann Allergy Clin Immunol 2012; 44:215-224. [PMID: 23441439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Some of the most recent advances in the diagnosis and treatment of childhood asthma and allergies are here reviewed. New perspectives have been opened by in vitro diagnostic tests for allergies based on a molecular approach and novel approaches to in vivo tests (SPT or FE(NO)). A better characterization of the patients is opening new classifications of allergic asthma and rhinitis phenotypes, which allow personalizing management disease programs and targeting pharmacotherapy. Educational programs and better communication are improving awareness and compliance with medical prescriptions and adherence to guidelines. Increasing information is being acquired on the mechanisms, efficacy and safety profiles of anti-asthma and anti-allergic drugs, including antihistamines, inhaled corticosteroids, long acting beta agonists, antibiotics, anti-IgE antibodies. Progress in biotechnologies is fostering new approaches to allergen-specific immunotherapy (subcutaneous, sublingual) concerning the quality, mechanisms, efficacy and safety of allergen products.
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Ferranti F, Muciaccia B, Ricci G, Dovere L, Canipari R, Magliocca F, Stefanini M, Catizone A, Vicini E. Glial cell line-derived neurotrophic factor promotes invasive behaviour in testicular seminoma cells. ACTA ACUST UNITED AC 2012; 35:758-68. [DOI: 10.1111/j.1365-2605.2012.01267.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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107
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Majori S, Ricci G, Capretta F, Loss R, Baldovin T, Cigolini D, Tardivo S, Zannoni M. The impact of acute intoxications in a toxicological unit care in north east Italy. JOURNAL OF PREVENTIVE MEDICINE AND HYGIENE 2012; 53:8-13. [PMID: 22803313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Retrospective study in a toxicological unit care (TUC) performed to know the epidemiology of acute intoxication (AI) in Verona (Italy) during years 2008-2009. All data regarding patients with a diagnosis of certain/suspected AI were collected and evaluated: some demographic information, the characteristics of the agent involved, the pattern of exposure, the triage at the admission to TUC and the outcome. 244 cases were analyzed: 45.9% males and 54.9% females, mean age respectively 45.1 and 43.9 years. The monthly distribution of admitted patients resulted fairly constant, except from a light rising prevalence in autumn, with a majority of yellow (45.9%) and green (43.4%) triage code. The pattern of exposure resulted: ingestion (82.7% of cases; age peaks: 18-34 and 35-51 years old; mostly due to food (as mushrooms), drinks, detergents, soap, pharmaceutical, drugs of abuse, caustics substances), contact (10.2% of cases; age peak 18-51) and inhalation (6.9% of cases). In 17.2% of cases the poisoning exposure was intentional. In 63.5% the patients were sent to their general practitioners (45.5% of the yellow and 81.1% of the green coded patients) and in 22.1% of cases they were admitted to clinical rooms (44.6% of the yellow coded patients). In most cases the triage code assigned to the studied patients resulted yellow and green. Considering that the seriousness of the symptoms can appear after several hours from the exposure to toxic substances, a quick and specific intervention to obtain the best therapeutical effectiveness is suitable, in order to save lives or to avoid irremediable health damages.
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Ferrario C, Ricci G, Borgo F, Fortina MG. Species-specific DNA probe and development of a quantitative PCR assay for the detection of Morganella morganii. Lett Appl Microbiol 2012; 54:292-8. [PMID: 22251367 DOI: 10.1111/j.1472-765x.2012.03206.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
AIMS To develop a SYBR Green quantitative PCR assay (qPCR) for the specific detection of Morganella morganii, a fish pathogen responsible for the Histamine Fish Poisoning. METHODS AND RESULTS A new primer set, amplifying a 179-bp fragment of the 16S rRNA gene, was selected for specificity, and 14 M. morganii strains and 32 non-Morganella strains were evaluated. The melting temperature of 84°C was consistently specific for the amplicon. Two standard curves were constructed: the minimum detection sensitivity was 0·563 pg of pure DNA, corresponding to DNA extracted from nine cells of M. morganii. The qPCR assay was evaluated in experiments with seeded fish samples, and the regression coefficient values were calculated. CONCLUSIONS A highly specific and rapid assay was developed for the detection of M. morganii in tuna fish samples. SIGNIFICANCE AND IMPACT OF THE STUDY This method represents the first study about the quantification of pathogenic M. morganii in fish products. This approach can be utilized to prevent the presence of this undesirable species in the food chain.
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Catizone A, Ricci G, Caruso M, Ferranti F, Canipari R, Galdieri M. Hepatocyte growth factor (HGF) regulates blood-testis barrier (BTB) in adult rats. Mol Cell Endocrinol 2012; 348:135-46. [PMID: 21843593 DOI: 10.1016/j.mce.2011.07.050] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 07/29/2011] [Accepted: 07/29/2011] [Indexed: 01/26/2023]
Abstract
We have studied the effects of HGF on BTB dynamics in adult rats. We demonstrate that, at stages VII-VIII of the epithelium wave when germ cells traverse the BTB, HGF reduces the levels of occludin and influences its distribution pattern and assembling. Moreover, we report that, at stages VII-VIII, HGF significantly increases the amount of active TGF-β and the amount of uPA present in the tubules. For the first time we report that, in the same stages, HGF reduces the amount of actin present in the BTB region, in which occludin levels are highest, and modifies the morphology of the actin cytoskeleton network. At the level of maximal intensity of occludin fluorescence, we report that HGF also modifies the colocalization of occludin and actin. Lastly, we demonstrate that HGF is maximally expressed at stages VII-VIII, whereas its levels fall in the subsequent stages.
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Lattanzi G, Basso A, Benedetti S, Bertini E, Biagini E, Boriani G, Carboni N, Cenacchi G, D'Amico A, D'Apice M, Fontana M, Gambineri A, Liguori R, Mazzanti L, Mercuri E, Mongini T, Morandi L, Nigro G, Palladino A, Pasquali R, Pini A, Politano L, Previtali S, Rapezzi C, Ricci G, Siciliano G. O-4
The Italian Network for Laminopathies. ACTA MYOLOGICA 2011; 30. [PMCID: PMC3235868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Angelini C, Semplicini C, Pegoraro E, Filosto M, Marrosu G, Piras R, Mongini T, Vercelli L, Tonin P, Servidei S, Di Giacopo R, Crescimanno G, Ravaglia S, Toscano A, Musumeci O, Siciliano G, Ricci G, Di Iorio, Cipullo F, Moggio M, Comi G, Lucchini V, Morandi L. O-3
Clinical features and outcome measures during
1 year enzyme replacement therapy in late
onset GSD II patients. ACTA MYOLOGICA 2011. [PMCID: PMC3235874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 10/30/2022]
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Bertolucci F, Ricci G, Papi R, Franzoni F, Galetta F, Bigalli G, Zecca M, Tartarisco G, Masoni C, Lo Gerfo A, Siciliano G. P-3
Exercise intolerance in Mc Ardle Disease:
functional and metabolic evaluation. ACTA MYOLOGICA 2011. [PMCID: PMC3235872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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113
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Ricci G, Bogatti P, Fischer-Tamaro L, Giolo E, Luppi S, Montico M, Ronfani L, Morgutti M. Factor V Leiden and prothrombin gene G20210A mutation and in vitro fertilization: prospective cohort study. Hum Reprod 2011; 26:3068-77. [DOI: 10.1093/humrep/der261] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Cigolini D, Ricci G, Zannoni M, Codogni R, De Luca M, Perfetti P, Rocca G. Hydroxocobalamin treatment of acute cyanide poisoning from apricot kernels. Emerg Med J 2011; 28:804-5. [DOI: 10.1136/emj.03.2011.3932rep] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Capaldi M, Ricci G, Bertolini R, Alessandroni L, Di Castro A, Saraco E, Guiducci A, Tersigni R. Colon cancer adrenal metastasis: case report and review of the literature. G Chir 2011; 32:361-363. [PMID: 22018256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The authors report a case of alone right adrenal metastasis from colon carcinoma discovered incidentally by CT scan imaging 4 years after colon resection in a 74-year-old man. The presence of metastasis in the adrenal glands represents the second most frequent cause of "adrenal incidentaloma", following cortical-adrenal adenomas. The most common primary tumors responsible for adrenal metastasis are carcinoma of the lung, breast and kidney. Alone adrenal metastases due to colon or rectal carcinoma is very rare. Due to their rarity, at present there are not randomised studies supporting the effectiveness of surgery. Nevertheless, on the basis of international Literature and our experience of adrenalectomy could represent the current "gold-standard" therapeutic approach.
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Zannoni M, Ricci G, Pratticò F, Codogni R, Tobaldini C, Puglisi S, Formaglio E, Rocca G. The tell-tale heart. Toxicol Lett 2011. [DOI: 10.1016/j.toxlet.2011.05.312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Cigolini D, Martinelli N, Zannoni M, Ricci G, Perfetti P, Codogni R, Rocca G, Olivieri O. Diversely-sized particulate matter air pollution (PM2,5, PM10-2.5) is associated with different acute manifestations of diseases in Emergency Department. Toxicol Lett 2011. [DOI: 10.1016/j.toxlet.2011.05.204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Caimmi S, Caimmi D, Lombardi E, Crisafulli G, Franceschini F, Ricci G, Marseglia G. Antibiotic Allergy. Int J Immunopathol Pharmacol 2011; 24:S47-53. [DOI: 10.1177/03946320110240s307] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Antibiotics are commonly injected during the perioperative period and are responsible of 15% of the anaphylactic reactions. Anaphylaxis triggered by antibiotics primarily involves penicillin and cephalosporin. The management of patients with histories of allergic reactions to antibiotics is a common situation in clinical practice. The confirmation or invalidation of the allergic nature of the reported reaction is not based on in vitro tests, but on a rigorous allergological work-up based on detailed analysis of clinical history, skin tests and drug provocation test. Considering a possible cross-reactivity between penicillins, once an immediate penicillin allergy has been diagnosed, skin testing with the alternative molecule (cephalosporin, carbapenem, aztreonam) is mandatory and, if negative, the relevant drug should be given in an appropriate setting at increasing doses.
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Ricci G, Piccinno V, Giannetti A, Miniaci A, Specchia F, Masi M. Evolution of Hypogammaglobulinemia in Premature and Full-Term Infants. Int J Immunopathol Pharmacol 2011; 24:721-6. [DOI: 10.1177/039463201102400318] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
There are few data in the literature reporting the evolution of hypogammaglobulinemia in premature and full-term infants during the first years of life. The aim of this study was to assess the clinical and immunological evolution of premature and full-term infants with hypogammaglobulinemia. We included 24 children (11 premature and 13 full-term infants), aged 0–36 months, with hypogammaglobulinemia. Fifteen (62.5%) children had an isolated reduction in IgG, 7 (29.2%) had a decrease in both IgG and IgA and 2 (8.3%) a reduction in IgG and IgM. Normalization of IgG serum levels occurred in the premature infants at a mean age of 7.2 months. Full-term infants were divided into 3 groups based on age at normalization of IgG serum level: A) hypogammaglobulinemia with normalization within 12 months of life; B) with normalization within 36 months of life; C) normalization after 36 months. All the premature infants with hypogammaglobulinemia recovered, even though in the lower limits for age in the first years, while transient hypogammaglobulinemia observed in full-term infants has a different age of recovery.
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Dessì M, Noce A, Fabrini R, Bocedi A, Fucci G, Pastore A, Manca di Villahermosa S, Ricci G, Callà C. Erythrocyte glutathione transferase: A new biomarker in chronic kidney diseases. Clin Biochem 2011. [DOI: 10.1016/j.clinbiochem.2011.03.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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121
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Volpi L, Ricci G, Orsucci D, Alessi R, Bertolucci F, Piazza S, Simoncini C, Mancuso M, Siciliano G. Metabolic myopathies: functional evaluation by different exercise testing approaches. Musculoskelet Surg 2011; 95:59-67. [PMID: 21373907 DOI: 10.1007/s12306-011-0096-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2010] [Accepted: 02/09/2011] [Indexed: 11/26/2022]
Abstract
Metabolic myopathies are a clinically and etiologically heterogeneous group of disorders due to defects in muscular energy metabolism. They include glycogen storage diseases, fatty acid oxidation defects, and mitochondrial disorders. The typical manifestations of a metabolic myopathy are exercise-induced myalgias, exercise intolerance, and cramps. Evaluating subjects with such symptoms is not easy because of the frequent lack of clinical features. Exercise tests are, therefore, reliable screening tools. Here, we discuss the possible role of such exercise testing techniques in the diagnostic approach of a patient with suspected metabolic myopathy.
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Ricci G, Giannetti A, Belotti T, Dondi A, Bendandi B, Cipriani F, Masi M. Allergy is not the main trigger of urticaria in children referred to the emergency room. J Eur Acad Dermatol Venereol 2011; 24:1347-8. [PMID: 20337828 DOI: 10.1111/j.1468-3083.2010.03634.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Urticaria is the disease that has the highest impact on quality of life and requires the most visits to the emergency room. OBJECTIVE To investigate the clinical presentation of acute urticaria in children referred to the paediatric emergency room of our hospital and to define possible related aetiologies. METHODS We included 814 children consecutively referred to the emergency room between January 2006 and December 2007 with a diagnosis of acute urticaria, isolated or associated with other clinical symptoms. RESULTS Only 2.0% of the cases studied were associated with severe clinical pictures. In 437 cases (53.7%), the cause of urticaria was not determined. The infections of the respiratory tract were the most frequently suspected aetiological factor. The diagnosis of allergic urticaria is more defined, but belongs to a minority group (10.8%). The first level treatment includes the use of non-sedating oral H1-antihistamine. CONCLUSION The children with urticaria are frequently referred to the paediatric emergency room, but only in a few cases were associated with severe clinical manifestations or allergy. The evidence of an inverse relationship between the number of accesses and the patients' age may be explained by the higher prevalence of this disease in early childhood and possibly also by a higher concern of the parents of the younger patients.
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Guglielmo MC, Ricci G, Catizone A, Barberi M, Galdieri M, Stefanini M, Canipari R. The effect of hepatocyte growth factor on the initial stages of mouse follicle development. J Cell Physiol 2011; 226:520-9. [PMID: 20683913 DOI: 10.1002/jcp.22361] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Interactions between theca and granulosa cells of the follicle are critical for the coordination of ovarian follicle development. The cell-cell interactions are mediated through the local production and actions of a variety of factors. The current study is designed to investigate the expression of Hgf and its receptor, c-Met, in the mouse ovary during in vivo folliculogenesis. We found that Hgf and c-Met mRNAs were already expressed in 2-day-old ovaries, and that, while c-Met levels remained constant until 22-day-old, Hgf levels slightly but not significantly increased with age. The expression of Hgf mRNA in theca/interstitial cells was higher than in granulosa cells in 22-day-old ovaries. Immunohistochemistry analysis confirmed the expression pattern demonstrated by RT-PCR. We investigated the role of hepatocyte growth factor (HGF) at the beginning of mouse folliculogenesis and its possible interaction with kit ligand (KL). Interestingly, both KL and HGF were able to increase the expression of each other, creating a positive feedback loop. In the presence of HGF, we observed an increase of granulosa cell proliferation and an increase in the number of pre-antral and early antral follicles in ovary organ cultures. We also observed a significant increase in the diameters of follicles in individual follicle cultures. Moreover, HGF stimulated the expression of the FSH receptors, both in the whole ovary and in isolated pre-antral follicle cultures. Based on the data presented, we concluded that HGF exerts multiple levels of control over follicular cell functions, which collectively enable the progression of follicular development.
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Paino F, Ricci G, De Rosa A, D'Aquino R, Laino L, Pirozzi G, Tirino V, Papaccio G. Ecto-mesenchymal stem cells from dental pulp are committed to differentiate into active melanocytes. Eur Cell Mater 2010; 20:295-305. [PMID: 20931491 DOI: 10.22203/ecm.v020a24] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Dental pulp stem cells (DPSCs) are multipotent stem cells derived from neural crest and mesenchyme and have the capacity to differentiate into multiple cell lineages. It has already been demonstrated that DPSCs differentiate into melanocyte-like cells but only when cultivated in a specific melanocyte differentiating medium. In this study we have shown, for the first time, that DPSCs are capable of spontaneously differentiating into mature melanocytes, which display molecular and ultrastructural features of full development, including the expression of melanocyte specific markers and the presence of melanosomes up to the terminal stage of maturation. We have also compared the differentiating features of DPSCs grown in different culture conditions, following the timing of differentiation at molecular and cytochemical levels and found that in all culture conditions full development of these cells was obtained, although at different times. The spontaneous differentiating potential of these cells strongly suggests their possible applications in regenerative medicine.
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Berlutti F, Catizone A, Ricci G, Frioni A, Natalizi T, Valenti P, Polimeni A. Streptococcus Mutans and Streptococcus Sobrinus are Able to Adhere and Invade Human Gingival Fibroblast Cell Line. Int J Immunopathol Pharmacol 2010; 23:1253-60. [DOI: 10.1177/039463201002300430] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Streptococcus mutans and Streptococcus sobrinus, the principal etiologic agents of caries decay of teeth, are generally acquired in oral cavity at the moment of tooth eruption. However, as S. mutans has been detected in oral cavity of predentate children, the eruption of teeth seems not to be a necessary prerequisite, suggesting that this species may be not confined to dental plaque. Here, we evaluate the ability of S. mutans and S. sobrinus in planktonic and biofilm lifestyle to adhere, invade and survive within human gingival fibroblast (HGF-1) cells. Planktonic and biofilm streptococci adhered and invaded host cells to different extents, showing higher efficiencies of biofilm than planktonic counterparts. Moreover, planktonic and biofilm streptococci showed the same percentage of survival within host cells. Transmission electron and confocal microscopy observations confirmed intracellular localization of planktonic and biofilm bacteria. The adhesion, invasion and survival abilities within human oral cells may be considered S. mutans and S. sobrinus virulence mechanisms to colonize and persist in the oral cavity in the absence of tooth surface.
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