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1.
Artigo em Inglês | MEDLINE | ID: mdl-39013735

RESUMO

Studies have consistently shown an association of the Le Fort I osteotomy with undesirable adverse events in the nasolabial region, including lengthening and thinning of the upper lip, a reduction in upper vermilion exposure, and nasal base enlargement. Various minimally invasive techniques have been developed based on knowledge collected over recent decades on the aetiopathogenesis of these aesthetic impairments. The common scope of these techniques is to reduce the damage to the facial soft tissues and achieve a sound and spontaneous healing process, avoiding those procedures that are commonly used to counteract undesirable aesthetic changes. This paper provides a summary of the aetiopathogenesis of these adverse events, as well as an overview of current concepts in minimally invasive surgically assisted rapid maxillary expansion (miSARME).

2.
Medicina (Kaunas) ; 60(6)2024 Jun 06.
Artigo em Inglês | MEDLINE | ID: mdl-38929564

RESUMO

The prevalence of skin aging and the request for effective treatments have driven dermatological research towards natural solutions. This study investigates the anti-aging efficacy of two bioactive natural polyphenols, Oleocanthal and Oleacein, in a skincare formulation. A single-blind, randomized clinical trial involved 70 participants, using a comprehensive exclusion criterion to ensure participant safety and study integrity. Participants applied the Oleocanthal and Oleacein 1% serum formulation twice daily for 30 days. The efficacy was objectively assessed using the VISIA® Skin Analysis System at baseline, after 15 days, and after 30 days. Results indicated significant wrinkle reduction in most groups. For women aged 45-79 years, the mean change was -33.91% (95% CI: -46.75% to -21.07%). For men aged 20-44 years, it was -51.93% (95% CI: -76.54% to -27.33%), and for men aged 45-79 years, it was -46.56% (95% CI: -58.32% to -34.81%). For women aged 20-44 years, the change was -25.68% (95% CI: -63.91% to 12.54%), not statistically significant. These findings highlight the potential of EVOO-derived polyphenols in anti-aging skincare, particularly for older adults. This research paves the way for further exploration into natural compounds in dermatology, particularly for aging skin management.


Assuntos
Aldeídos , Monoterpenos Ciclopentânicos , Fenóis , Envelhecimento da Pele , Humanos , Pessoa de Meia-Idade , Feminino , Masculino , Idoso , Adulto , Envelhecimento da Pele/efeitos dos fármacos , Método Simples-Cego , Fenóis/uso terapêutico , Fenóis/farmacologia
3.
Eur Rev Med Pharmacol Sci ; 26(19): 7285-7289, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-36263540

RESUMO

OBJECTIVE: On March 11, 2020, the World Health Organization (WHO) has declared the novel coronavirus (COVID-19) outbreak as a global pandemic. COVID-19 pandemic has impacted health services, including immunization programs, with a consequent reduction in vaccination coverage in those categories for which the prevention of vaccine-preventable diseases is strongly recommended. SUBJECTS AND METHODS: We conducted a retrospective cross-sectional study on the general population and on PLWHs, comparing anti-human papillomavirus (HPV) vaccination coverage data in 2019, before COVID-19 pandemic, and the 2020 data, after the announcement of the pandemic state and the lockdown and the implementation of restrictive measures to contain the contagion. RESULTS: Compared to 2019, 2020 data show a 42% reduction in HPV vaccine coverage in the general population and 36% in PLWHs. The greatest reduction in anti-HPV vaccination coverage occurred during periods of greatest restriction and mainly concerned the general population. CONCLUSIONS: The prevention of vaccine-preventable diseases remains essential. Above all, it is essential to increase and recover the anti-HPV vaccine coverage, in consideration of the data that show its preventive oncological efficacy.


Assuntos
COVID-19 , Infecções por Papillomavirus , Vacinas contra Papillomavirus , Doenças Preveníveis por Vacina , Humanos , Cobertura Vacinal , COVID-19/prevenção & controle , Pandemias/prevenção & controle , Estudos Transversais , Estudos Retrospectivos , Infecções por Papillomavirus/epidemiologia , Infecções por Papillomavirus/prevenção & controle , Controle de Doenças Transmissíveis , Vacinas contra Papillomavirus/uso terapêutico , Vacinação
4.
Ig Sanita Pubbl ; 80(6): 666-675, 2021.
Artigo em Italiano | MEDLINE | ID: mdl-35119054

RESUMO

The COVID-19 pandemic has put a strain on all health systems as there has been a growing rapidity in the demand for health care from COVID 19 positive patients in hospitals around the world. With the intensification of the pandemic, determining in real time the consequent needs for health resources (beds, personnel, equipment) has in fact become the fundamental priority for many countries to ensure health services consistent with the health needs expressed by the population. In Italy, the demand has often been satisfied with the conversion of existing beds and the remodeling of the healthcare offer or where the available resources allow it also with the opening of new beds dedicated to pandemic assistance. This work analyzes the falls detected at the time of COVID in patients and hospitalized in direct hospital beds (600 beds) of a Local Health Authority of Lazio (ASL ROMA 2). Although the data on the incidence of falls recorded in the three centers were equal to 2.21 every 1000 days of beds occupied and that the data recorded are lower than those reported in the literature, it is also true that the increase in average hospital stay and the reduction in the rotation rate of beds had an impact on the still low occupancy rates compared to the literature data.The COVID-19 pandemic has put a strain on all health systems as there has been a growing rapidity in the demand for health care from COVID 19 positive patients in hospitals around the world. With the intensification of the pandemic, determining in real time the consequent needs for health resources (beds, personnel, equipment) has in fact become the fundamental priority for many countries to ensure health services consistent with the health needs expressed by the population. In Italy, the demand has often been satisfied with the conversion of existing beds and the remodeling of the healthcare offer or where the available resources allow it also with the opening of new beds dedicated to pandemic assistance. This work analyzes the falls detected at the time of COVID in patients and hospitalized in direct hospital beds (600 beds) of a Local Health Authority of Lazio (ASL ROMA 2). Although the data on the incidence of falls recorded in the three centers were equal to 2.21 every 1000 days of beds occupied and that the data recorded are lower than those reported in the literature, it is also true that the increase in average hospital stay and the reduction in the rotation rate of beds had an impact on the still low occupancy rates compared to the literature data. In fact, the scientific literature shows that in England and Wales, whose national health service is very similar to the Italian one, the falls of patients in hospitals with optimal bed occupancy rates and optimal average hospitalization rates (equal to 4.5 days in general medicine, 3.5 days in general surgery, 3 days in orthopedics) represent the first sentinel event in terms of incidence and frequency, albeit with a very variable damage detection. The average falls is 6.63 falls per 1,000 bed-occupied days, which equates to approximately 1,700 falls per year in an 800-bed hospital with an optimal occupancy rate. Regarding damage, the literature documents that physical injuries and fractures occur in 30-50% of events and fractures occur in 1-3% of cases. The data collected in ASL ROMA 2 have documented that despite the increase in staff dedicated to assistance by 15 - 30%, an increase due to the application of COVID pathways and to the activities of compression of the risk of circulation of the virus among hospitalized patients , the rate of falls has nevertheless increased by 13.5% despite the persistence of standards of quality and safety of patients in care activities, debunking the paradigm that falls can be caused by an undersizing of the care staff and by the possible overcrowding of the emergency departments - urgency.


Assuntos
COVID-19 , Acidentes por Quedas , Hospitais , Humanos , Incidência , Tempo de Internação , Pandemias , SARS-CoV-2 , Medicina Estatal
5.
Clin Ter ; 171(1): e75-e79, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33346333

RESUMO

INTRODUCTION: Although scientific evidence shows the numerous benefits of screening programs, in Italy. There is a great disparity between the regional coverage of the North and South despite the screening programs have been activated for several years in all regions even with territorial differences. OBJECTIVE: The aim of our study was to evaluate the knowledge and adherence to different screenings in the population, the influence exercised by the local health authority the role of the general practitioner in advising and referring patients to screening tests and the main causes of refuse. MATERIAL AND METHODS: The study was carried out, from December 2019 to May 2020, through the administration of anonymous self-filled "ad hoc" questionnaires to women and men over 26 years old. RESULTS: in our sample 36% have never performed a breast check and 39% of the interviewees never had a mammogram; for cervical cancer 25% did not ever perform screening and 65% did not have an indication by GP. The worst result was found for colorectal cancer (only 27% of the sample performed the screening). The role of GP was fundamental for and similar to other studies, was fundamental in fact,similar to other studies the most frequent reported reasons for the non-execution of screening were the lack of physicians' advice, follwed by lack of time, the most frequent reported reasons for the non-execution of screening were the lack of physicians' advice, a lack of time, fear of cancer and embarrassment at visiting a gynaecologist. DISCUSSION AND CONCLUSIONS: the study carried out found that despite the knowledge of the oncological disease and the possibilities of prevention is fairly rooted in the population, adherence to the screening is quite inadequate, especially as regards colorectal cancer.


Assuntos
Neoplasias Colorretais/diagnóstico , Detecção Precoce de Câncer/estatística & dados numéricos , Mamografia/estatística & dados numéricos , Características de Residência/estatística & dados numéricos , Neoplasias do Colo do Útero/diagnóstico , Adulto , Idoso , Neoplasias da Mama/diagnóstico , Detecção Precoce de Câncer/normas , Feminino , Humanos , Itália/epidemiologia , Pessoa de Meia-Idade , Fatores Socioeconômicos , Inquéritos e Questionários , Saúde da Mulher
6.
J Maxillofac Oral Surg ; 14(3): 845-7, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-26225087

RESUMO

Calibre persistent labial artery (CPLA) usually presents as an asymptomatic papule on the lower lip and can be easily misdiagnosed as a mucocele, haemangioma, venous lake, varix or fibroma. When it is ulcerated, squamous cell carcinoma is the most usual differential diagnosis. Here, we report a case of a 25-year-old woman with no previous relevant medical history who presented with a complaint of an asymptomatic, non-ulcerated, progressively growing nodule (over the last 5 months) on the upper lip. In this case, the diagnosis was made clinically and confirmed by immunohistochemical analysis. We conclude that clinicians should be aware of CPLA and it should be included in the differential diagnosis of labial mucosal papules. Sometimes, the immunohistochemical analysis is necessary to make a correct diagnosis.

7.
Minerva Stomatol ; 61(6): 247-53, 2012 Jun.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-22669054

RESUMO

AIM: The purpose of this study is to compare surgical times, the saving of bonytissues, the postoperative course of the extraction of included third molars in patients treated with piezoelectric surgery compared to those treated with conventional rotary instruments. METHODS: The study included 140 patients with upper and lower third molars included. 70 of them were treated with osteotomy using conventional rotary instruments (Group 1) and 70 more with osteotomy through piezosurgery Mectron® (GROUP 2). The treatment protocol was the same for both groups. The time of surgery and the saving of bonytissues in the intra-operative have been estimated; moreover, 24-48-72 hours and 7 days after the surgery, two other parameters have been estimated: facial swelling and trismus. The swelling, trismus and the saving of bony tissues were assessed by a surgery gauge. RESULTS: The average surgical time was 15 minutes in Group 1 and 20 minutes in Group 2. The savings of bonytissues was greater in Group 2 than in group 1 by 2.7 mm. The average facial swelling was 6.23 mm for group 1 and 2.86 mm for group 2 24 hours after the surgery, of 5.22 mm for group 1 and 1.76 mm for group 2 48 hours after the intervention, of 3.75 mm for Group 1 and 0.85 for group 2 72 hours after the surgery, of 0.86 mm for group 1 and 0.12 for group 2. The average trismus was of 14.76 mm in Group 1 and 11.15 mm in Group 2. Statistical analysis showed a significant reduction of swelling, trismus and a bigger saving of bony tissues in Group 2 and a reduction in surgical time in Group 1. CONCLUSION: The osteotomy technique with a piezoelectric instrument has produced a significant reduction in facial swelling, trismus and a bigger saving of bony tissues than with conventional rotary instruments. A slight lengthening in terms of surgical time has been recorded, compared to the use of conventional rotary instruments.


Assuntos
Dente Serotino/cirurgia , Osteotomia/instrumentação , Osteotomia/métodos , Humanos , Duração da Cirurgia , Resultado do Tratamento
9.
Int J Immunopathol Pharmacol ; 24(2 Suppl): 129-32, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21781458

RESUMO

Sexual hormones play an important role in expression of genes involved in a wide variety of biological and neoplastic processes. The information on Estrogen Receptors (ER) expression in non-target tissues is very few and, in particular, the studies in head and neck tumors are still controversial. Recent studies analyzed the role of Tamoxifen (TAM) on Oral Squamous Cell Carcinoma (OSCC) lines in relation to the presence/absence of ER. The purpose of the present study was to evaluate the expression of sexual hormones receptors mRNAs, in particular Estrogen Receptor alpha (ERα) and Androgen Receptor (AR) mRNA in OSCC tissues. The study group comprised 20 samples of OSCC, harvested from 20 otherwise healthy subjects (14 males and 6 females, mean age 58.2y, range 38-74). The control group was formed by 20 samples of normal mucosa harvested around the margins of the specimens (at least 1 cm from the lesion margins). Estrogens Receptor alpha (Era) and Androgen Receptor (AR) mRNA expressions were analyzed by RT-PCR carried out on total RNAs extracted from both cancerous and healthy tissues. Obtained data were evaluated by Shapiro-Walk normality test and compared by Student's t test. Results with p<0.05 were considered statistically significant. AR transcripts were less expressed in OSCC specimens than in healthy tissues, while levels of ERα transcripts significantly increased in tumor samples. These preliminary data show different expression patterns of AR and ERα mRNAs in malignant tissues of oral mucosa and could suggest an involvement of these sexual hormones in oral cancer.


Assuntos
Carcinoma de Células Escamosas/genética , Receptor alfa de Estrogênio/genética , Neoplasias Bucais/genética , Receptores Androgênicos/genética , Adulto , Idoso , Estudos de Casos e Controles , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
10.
Ig Sanita Pubbl ; 66(3): 357-74, 2010.
Artigo em Italiano | MEDLINE | ID: mdl-20859309

RESUMO

As in high reliability systems , also in surgery the causes of adverse events are primarily correlated to deficiencies in Non Technical Skills (individual and social skills), that contribute with Technical Skills to a safe surgical procedure. Non Technical Skills are cognitive behavioural and interpersonal abilities, that are not specific to the expertise of one profession, but very important to guarantee the patient safety and to reduce risk of errors and adverse events. The Observational Teamwork Assessment for Surgery (OTAS) is an useful tool to assess teamwork of the whole surgical team (surgeons, anaesthetists, nurses) in real time and through the surgical procedure (pre-intra-postoperative phases). OTAS consists of the two following parts: a) teamwork-related task checklist to fill by a surgeon, b) teamwork-related behaviours rated by a psychologist/human factors expert. Back translation in Italian language of the eight task checklists and of the rating scales of the five behavioural areas was performed by two Italian surgeons with certified English language knowledge. The OTAS model in Italian language was applied in four surgical procedures : the test-retest reliability was found to be acceptable with K- Pearson index. The internal consistency of behavioural scales appeared sound using Cronbach ?. OTAS is an useful tool to assess the risk factors correlated to patient and team and to detect the vulnerability areas where changes to reduce errors and improve surgical outcomes might be introduced.


Assuntos
Medição de Risco , Gestão da Segurança , Procedimentos Cirúrgicos Operatórios/normas , Inquéritos e Questionários , Equipes de Administração Institucional , Itália
11.
J Parasitol ; 96(4): 823-6, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20476801

RESUMO

Ninety specimens of Rhinella fernandezae , collected in Imbé, State of Rio Grande do Sul, Brazil, from August 2006 to April 2007, were examined for presence of helminth parasites; all were infected by at least 1 species. Thirteen species of parasites were found: 4 digeneans, 2 cestodes, 2 acanthocephalans, and 5 nematodes. Rhinella fernandezae represents a new host record, as well as for Gorgoderina festoni , Cylindrotaenia americana , Acanthocephalus lutzi , Aplectana meridionalis , and Strongyloides carinii . The nematodes Cosmocerca parva and A. meridionalis occurred with a prevalence of 79.1%, and, as in other Rhinella species, the nematodes dominated the parasite community. Host gender had no influence on either abundance or prevalence of the helminths, and neither the length nor weight of the hosts influenced the richness of the parasitic helminths of these burrowing toads. Only A. meridionalis and Centrorhynchus sp. (both cystacanths) exhibited a significant correlation between host length and abundance of helminths; only A. meridionalis showed a relationship between host length and prevalence.


Assuntos
Bufonidae/parasitologia , Helmintíase Animal/parasitologia , Helmintos/classificação , Animais , Tamanho Corporal , Brasil/epidemiologia , Feminino , Helmintíase Animal/epidemiologia , Helmintos/crescimento & desenvolvimento , Masculino , Prevalência , Fatores Sexuais
12.
Int J Cardiol ; 141(2): 201-2, 2010 May 28.
Artigo em Inglês | MEDLINE | ID: mdl-19346020

RESUMO

BACKGROUND: Patients with primary hyperparathyroidism (pHPT) show an increased bioelectrical risk not related to cardiovascular complications, this risk seems to persist after surgery and this last finding is still controversial and probably related to follow-up length. METHODS: The aim of the study is to evaluate QT parameters in 11 patients with primary hyperparathyroidism (pHPT) 18 months after parathyroid surgery using computed standard 12-leads ECG compared to those of 29 healthy subjects (HS). RESULTS: In pHPT patients, 4 months after parathyroidectomy QT and QTc dispersion persist significantly higher than HS. 18 months after surgery, QT and QTc dispersion resulted comparable with HS. QT dispersion was found significantly higher in pHPT at 4 months respect 18 months after parathyroidectomy. CONCLUSIONS: ECG alteration after parathyroidectomy gradually return within normal limits and we can affirm that surgery erase bioelectrical risk in pHPT.


Assuntos
Eletrocardiografia , Hiperparatireoidismo Primário/cirurgia , Paratireoidectomia , Estudos de Casos e Controles , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
14.
Minerva Stomatol ; 56(5): 293-302, 2007 May.
Artigo em Inglês, Italiano | MEDLINE | ID: mdl-17529916

RESUMO

Ulcers and/or erosions can be the final common manifestation, often clinically indistinguishable, of a wide and complex spectrum of conditions including traumatic lesions, infectious, vesiculo-bullous, neoplastic and gastrointestinal diseases. Their formation represents the final outcome of a complex and finely orchestrated phenomenon involving both epithelial lining and chorion. Reduction of blood flow, cytokine production, cell death, wound repair, all participate to the dynamic process which we define as ''ulcer''. However, little is known about the mechanisms which crucially contribute in determining the phenomenology of ulcer, and some questions still remain unsolved. This paper aims to explain the pathophysiology of oral ulcers attempting to answer three questions: the mechanism of ulcer development, the site of appearance, and the factors which determine the severity and healing time of ulcerative lesions.


Assuntos
Úlceras Orais/fisiopatologia , Apoptose , Humanos , Boca/patologia , Necrose , Úlceras Orais/etiologia , Índice de Gravidade de Doença
15.
J Cutan Pathol ; 34(3): 281-3, 2007 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-17302614

RESUMO

We present a case of late granulomatous reactions from silicone that first appeared in a site different from that of the injection causing an incorrect diagnosis of liposarcoma in the beginning. The histological picture was a cystic-macrophagic granuloma in both the injection site (upper lip) and the migrating site (paranasal regions). We think that the foreign body has undergone an antigravity migration from the upper lip to the right paranasal region. To our knowledge, such a phenomenon has not been yet reported in literature.


Assuntos
Técnicas Cosméticas/efeitos adversos , Granuloma de Corpo Estranho/diagnóstico , Granuloma de Corpo Estranho/etiologia , Próteses e Implantes/efeitos adversos , Silicones/efeitos adversos , Biomarcadores/metabolismo , Dermatologia/métodos , Face/patologia , Feminino , Granuloma de Corpo Estranho/metabolismo , Humanos , Imuno-Histoquímica , Injeções Subcutâneas , Pessoa de Meia-Idade , Patologia Cirúrgica/métodos , Pele/metabolismo , Pele/patologia
16.
Br J Sports Med ; 40(5): 447-50, 2006 May.
Artigo em Inglês | MEDLINE | ID: mdl-16632577

RESUMO

BACKGROUND: High demands imposed to the shoulder during tennis activity can decrease the efficiency of static and dynamic constraints. Subtle or frank instability of the glenohumeral joint may occur, and long term degenerative changes may be expected. OBJECTIVE: To determine and compare the prevalence of primary glenohumeral osteoarthritis in senior tennis players and matched controls. STUDY DESIGN: Cross sectional controlled study. METHODS: 18 asymptomatic senior tennis players were studied (17 male; mean (SD) age, 57.2 (8.8) years) with no history of shoulder surgery or major trauma. There were 18 matched controls. Radiographs were used to determine glenohumeral osteoarthritic changes: joint space narrowing, humeral and glenoid subchondral sclerosis, humeral and glenoid juxta-articular cysts, osteophytes, humeral and glenoid flattening, humeral posterior displacement and glenoid posterior erosion. Findings were classified as normal, minimal, moderate, or severe changes. RESULTS: 33% of the players (95% confidence interval (CI), 13% to 59%) had osteoarthritic changes in their dominant shoulder (n = 6; five with minimal changes, one with moderate changes), and 11% of the controls (95% CI, 1% to 34%) had articular degeneration on their dominant side (n = 2; both minimal changes) (p = 0.04, Wilcoxon test). The osteoarthritic group was significantly older than the players without degenerative changes (p = 0.008). CONCLUSIONS: The prevalence of glenohumeral osteoarthritis in the dominant shoulder was greater in former elite tennis players than in sedentary controls. Prolonged intensive tennis practice may be a predisposing factor for the development of mild degenerative articular changes in the dominant shoulder.


Assuntos
Osteoartrite/etiologia , Lesões do Ombro , Tênis/lesões , Idoso , Estudos de Casos e Controles , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Osteoartrite/diagnóstico por imagem , Osteoartrite/epidemiologia , Prevalência , Radiografia , Fatores de Risco , Articulação do Ombro/diagnóstico por imagem
18.
Int J Immunopathol Pharmacol ; 18(3 Suppl): 47-53, 2005.
Artigo em Inglês | MEDLINE | ID: mdl-16848987

RESUMO

The aim of our study is to evaluate in vitro the response of bone marrow stromal cells (BMSCs) to platelet-rich plasma (PRP), in order to clarify the potential role of their combined use in a preclinical phase preceding BMSCs transplantation for bone repair and regeneration procedures. The incubation of BMSCs with PRP promoted a remarkable, dose- and time- dependent, growth stimulation, that was paralleled to a strong increase in the quantity of type I collagen and to a significant decrease in the activity of the early osteoblastic differentiation marker, alkaline phosphatase (AP). Once PRP was removed and osteogenic inducers were added, AP returned to levels comparable to the control, while the late phenotypic markers, osteocalcin and matrix calcification, were enhanced to higher levels than in controls. Our data demonstrate that PRP induces a remarkable ex vivo enrichment of BMSCs maintaining their differentiative potential. Thus PRP represents a valid preclinical tool for obtaining an effective, rapid and safe ex vivo expansion of BMSCs prior to their clinical utilization in bone engineering.


Assuntos
Células da Medula Óssea/fisiologia , Plasma Rico em Plaquetas/fisiologia , Células Estromais/fisiologia , Cirurgia Bucal/métodos , Regeneração Óssea , Diferenciação Celular , Proliferação de Células , Humanos , Osteoblastos/citologia
19.
Environ Sci Technol ; 35(23): 4592-6, 2001 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-11770760

RESUMO

Several organochlorine pesticides are chiral molecules manufactured as racemic mixtures. Past research has shown that selective degradation of pesticide enantiomers by microorganisms occurs resulting in nonracemic signatures in soils. In this work, volatilization of chiral pesticides from soil was investigated to determine if enantioselective breakdown in soils could be used as a source signature to track releases of chiral pesticides to the atmosphere. Air samples were taken directly above agricultural soils at several sites, and enantiomeric signatures were found to be nonracemic following patterns found in the soil. A follow up study at one site showed that for most compounds concentration decreased with increasing height above the soil, while enantiomer fractions for chiral pesticides were similar to that found in the soil, signifying the soil as a source to the air. The enantiomer fractions of ambient air samples from rural nonagricultural areas in the region were also found to be nonracemic.


Assuntos
Agricultura , Poluentes Atmosféricos/análise , Hidrocarbonetos Clorados , Inseticidas/análise , Poluentes do Solo/análise , Monitoramento Ambiental , Estados Unidos , Volatilização , Zea mays
20.
Clin Exp Immunol ; 122(3): 429-36, 2000 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-11122251

RESUMO

Two monoclonal antibodies (1H6.2 and 45.30) were raised against MBP purified from human brain under experimental conditions that allowed MBP to retain binding to surrounding myelin lipids (human lipid-bound MBP (hLB-MBP)). 1H6.2 and 45.30 MoAbs were selected on the basis of their different binding properties to: hLB-MBP, human lipid-free-MBP (hLF-MBP) and bovine lipid-free-MBP (bLF-MBP). Although the isotype of both MoAbs was IgM, their specificity, as tested in ELISA assays against chemical haptens and unrelated protein antigens, was restricted to MBP. 1H6.2 and 45.30 MoAbs stained MBP from human brain white matter tissue extracts, as well as bLF-MBP, in Western blot assays. Both MoAbs stained oligodendrocytes and myelin in immunohistochemical analysis of white matter from human brain. Tissue sections from human peripheral nerves were labelled by 1H6.2 only, however, demonstrating that the MoAbs recognize two different epitopes. Epitopes recognized by 1H6.2 and 45.30 MoAbs were also expressed by a wide array of human non-neural cells of either normal or pathological origin, as evidenced by cytofluorimetric assays. In particular, MBP epitopes (MEs) were expressed by lymphoid cells as well as by cells which play a pivotal role in immune homeostasis and in the immune response, such as thymic epithelial cells and professional antigen-presenting cells. Both MoAbs were efficiently internalized by cells from a human B cell line, suggesting trafficking of MEs along the endocytic pathways. These findings support hypotheses regarding the role of MEs expressed by non-neural cells in establishing self-tolerance and/or in triggering the immune response against MBP antigen.


Assuntos
Epitopos de Linfócito B/biossíntese , Proteína Básica da Mielina/biossíntese , Células 3T3 , Animais , Anticorpos Monoclonais/biossíntese , Anticorpos Monoclonais/imunologia , Células Apresentadoras de Antígenos/imunologia , Bovinos , Linhagem Celular Transformada , Epitopos de Linfócito B/imunologia , Humanos , Imunoglobulina M/biossíntese , Imunoglobulina M/imunologia , Camundongos , Camundongos Endogâmicos BALB C , Proteína Básica da Mielina/imunologia , Neurônios/imunologia , Células Tumorais Cultivadas
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