Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 39
Filtrar
1.
J Hosp Infect ; 145: 34-43, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38110057

RESUMEN

BACKGROUND: Periprosthetic joint infection (PJI) is a significant post-arthroplasty complication for diabetic patients, with uncontrolled diabetes identified as a PJI risk factor. Taiwan's Diabetes Shared Care Program (DSCP) was established for holistic diabetes care. AIM: To evaluate the DSCP's impact on PJI incidence and patients' medical costs. METHODS: Data were analysed from Taiwan's National Health Insurance Research Database from 2010 to 2020, focusing on type 2 diabetes mellitus (DM) patients who had undergone arthroplasty. The study group involved DSCP participants, while a comparison group comprised non-participants with matched propensity scores for age, sex, and comorbidities. The primary outcome was the PJI incidence difference between the groups; the secondary outcome was the medical expense difference. FINDINGS: The study group consisted of 11,908 type 2 DM patients who had arthroplasty and joined the DSCP; PJI occurred in 128 patients. Among non-participants, 184 patients had PJI. The PJI incidence difference between the groups was statistically significant (1.07% vs 1.55%). The study group's medical costs were notably lower, regardless of PJI incidence. Multivariate regression showed higher PJI risk in patients in comparison group, aged >70 years, male, or who had obesity, anaemia. CONCLUSION: The study indicates that DSCP involvement reduces PJI risks and decreases annual medical costs for diabetic patients after arthroplasty. Consequently, the DSCP is a recommendable option for such patients who are preparing for total joint arthroplasty.


Asunto(s)
Artroplastia de Reemplazo de Cadera , Diabetes Mellitus Tipo 2 , Infecciones Relacionadas con Prótesis , Humanos , Masculino , Diabetes Mellitus Tipo 2/complicaciones , Factores de Riesgo , Infecciones Relacionadas con Prótesis/complicaciones , Taiwán/epidemiología , Artroplastia de Reemplazo de Cadera/efectos adversos , Estudios Retrospectivos
2.
Anim Genet ; 54(6): 803-807, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-37705287

RESUMEN

Semen is a measure of the reproductive efficiency of roosters, which affects the economic benefits of white-feathered broilers. Over the years, research in this field has mainly focused on hens, while there have been fewer studies on the reproductive traits of roosters. To identify the genes related to the semen traits of roosters, we used a chicken 55 K SNP chip to genetically type the white-feathered population (220) and performed imputation with resequencing data from 97 roosters. In total, 1 048 576 SNPs were obtained and used for genome-wide association analysis of semen volume, from which 197 genome-wide significant markers were identified, all within the interval of 13.82-16.12 Mb on chromosome 7. By combining our results with the biological functions of genes in the interval, four candidate genes were identified that potentially relate to semen volume: FAPP1, OSBPL6, SESTD1 and SSFA2. Our findings may provide a basis for further research on the genetic mechanism and marker-assisted selection of semen volume in white-feathered broilers.


Asunto(s)
Pollos , Estudio de Asociación del Genoma Completo , Animales , Masculino , Femenino , Estudio de Asociación del Genoma Completo/veterinaria , Pollos/genética , Semen , Análisis de Semen , Fenotipo , Polimorfismo de Nucleótido Simple
3.
J Postgrad Med ; 69(3): 176-178, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37357487

RESUMEN

We herein report a case of Behçet's disease in a 27-year-old female who suffered from generalized skin rashes for one week. After hospitalization, massive bloody stools accompanying hypovolemic shock occurred. Emergency abdominal computed tomography-angiography failed to detect the bleeding source. Esophagogastroduodenoscopy also demonstrated no definite bleeding points. Ileocolonoscopy showed multiple large and deep ulcers with some blood coating and mild oozing in the terminal ileum. We initially performed epinephrine injection and hemoclips for her intestinal bleeding. However, massive bloody stools still continued. Thus, we prescribed a loading dose of 160 mg adalimumab followed by weekly 80 mg adalimumab subcutaneous injections to the patient. Following this treatment, her gastrointestinal bleeding gradually subsided and completely stopped within a few days. After three-week therapy with adalimumab, capsule endoscopy showed several healing ulcers without bleeding in the distal to the terminal ileum. She continues to be treated with adalimumab, azathioprine, and mesalazine without recurrent bleeding.


Asunto(s)
Síndrome de Behçet , Femenino , Humanos , Adulto , Adalimumab/uso terapéutico , Síndrome de Behçet/complicaciones , Síndrome de Behçet/tratamiento farmacológico , Síndrome de Behçet/diagnóstico , Úlcera/complicaciones , Úlcera/tratamiento farmacológico , Hemorragia Gastrointestinal/tratamiento farmacológico , Hemorragia Gastrointestinal/etiología , Íleon/diagnóstico por imagen
5.
Osteoporos Int ; 30(5): 1043-1049, 2019 May.
Artículo en Inglés | MEDLINE | ID: mdl-30706096

RESUMEN

Benign prostatic hyperplasia is one of the most common diseases in the elderly male population. The urinary tract symptoms may increase the risk of falls and fractures. The results indicated that patients with benign prostatic hyperplasia could increase the risk of vertebral compression fractures in both the thoracic and lumbar spine and also hip fractures, but did not increase the risk of wrist fracture. INTRODUCTION: The relationship between benign prostatic hyperplasia and the development of fall-related fractures, especially vertebral compression fractures, has been seldom mentioned in the literature. This study aimed to evaluate the risk of developing vertebral compression fracture, hip fracture, and wrist fracture in patients with benign prostatic hyperplasia. METHODS: This study obtained claims data retrospectively from the National Health Insurance Research Database of Taiwan and identified 48,114 patients who were diagnosed as having benign prostatic hyperplasia. Subjects of the control cohort were individually matched at a ratio of 4:1 with those in the benign prostatic hyperplasia cohort according to age and the index day. Comorbidities were classified as those existing before the index day and included a previous fracture history, osteoporosis, myocardial infarction, congestive heart failure, diabetes mellitus, hypertension, cerebrovascular accident, etc. The end of the follow-up period of the analyses was the day when the patient developed new vertebral compression fractures, hip fractures, or wrist fractures, terminated enrollment from the National Health Insurance, or died or until the end of 2012. The study used the Cox proportion hazard model to determine the hazard ratio for developing new hip fractures. RESULTS: Patients with benign prostatic hyperplasia were significantly more likely than those in the control cohort to develop new vertebral compression fractures in the thoracic spine (0.43% vs. 0.40%, adjusted hazard ratio 3.03, confidence interval 2.12-4.31) and lumbar spine (1.26% vs. 1.23%, adjusted hazard ratio 4.12, confidence interval 3.39-5.01), and hip fracture (1.47% vs. 2.09%, adjusted hazard ratio 1.22, confidence interval 1.10-1.36), but does not increase the risk of wrist fracture (0.61% vs. 0.67%, adjusted hazard ratio 1.07, confidence interval 0.85-1.34). CONCLUSIONS: Patients with benign prostatic hyperplasia exhibited an increased risk of developing vertebral compression fractures in both the thoracic and lumbar spine and also hip fractures, but did not increase the risk of wrist fracture. However, more research is needed to confirm this trend in the clinical setting.


Asunto(s)
Fracturas de Cadera/etiología , Fracturas Osteoporóticas/etiología , Hiperplasia Prostática/complicaciones , Fracturas de la Columna Vertebral/etiología , Traumatismos de la Muñeca/etiología , Accidentes por Caídas/estadística & datos numéricos , Adulto , Anciano , Comorbilidad , Bases de Datos Factuales , Fracturas de Cadera/epidemiología , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Fracturas Osteoporóticas/epidemiología , Hiperplasia Prostática/epidemiología , Estudios Retrospectivos , Medición de Riesgo/métodos , Fracturas de la Columna Vertebral/epidemiología , Taiwán/epidemiología , Traumatismos de la Muñeca/epidemiología
6.
Trop Biomed ; 34(1): 237-239, 2017 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-33593002

RESUMEN

We investigated the prevalence of Asian fish tapeworm Bothriocephalus infection in grass carp in Dongting Lake of Hunan province, subtropical China between August 2014 and October of 2015. A total of 2534 fish samples from four representative administrative regions in Hunan province, subtropical China were examined for the presence of Bothriocephalus using helminthological approach. The overall prevalence of Bothriocephalus in grass carp was 6.6% (167/2534). The prevalence of Bothriocephalus in grass carp was higher in summer (10.0%) and spring (7.0%) than in autumn (6.0%) and winter (3.3%) (P<0.01). The highest prevalence of Bothriocephalus was found in grass carp with body weight 0.5

8.
Allergy ; 68(12): 1610-3, 2013 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-24117783

RESUMEN

Asthma is a chronic inflammatory airway disease accounting for severe morbidity and mortality in children. To determine the characteristics of traditional Chinese medicine (TCM) used to treat pediatric asthma, we conducted a nationwide population-based study by analyzing a cohort of one million randomly sampled patients from the beneficiaries of the National Health Insurance Program in Taiwan from 2002 to 2010. Children under 18 years of age with newly diagnosed asthma (ICD-9-CM code: 493, N = 45 833) were enrolled, and 57.95% (N = 26 585) of them had used TCM. The number of TCM users was significantly more than that of non-TCM users in school-age children. The most commonly prescribed TCM formula is Ding-chuan-tang, or Xing-ren (Semen Armeniacae Amarum) for the single herb. Our study is the first to reveal characteristics and prescription patterns of the use of TCM in children with asthma. Further research is needed to elucidate the efficacy and safety of these Chinese herbal products.


Asunto(s)
Asma/tratamiento farmacológico , Medicamentos Herbarios Chinos/uso terapéutico , Medicina Tradicional China , Adolescente , Asma/epidemiología , Niño , Preescolar , Femenino , Humanos , Lactante , Recién Nacido , Masculino , Programas Nacionales de Salud , Evaluación de Resultado en la Atención de Salud , Taiwán
9.
Lupus ; 19(10): 1219-28, 2010 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-20530519

RESUMEN

An imbalance between T Helper 1 (T(H)1) and T Helper 2 (T(H)2) cytokine production is important for the pathogenesis of systemic lupus erythematosus (SLE). We aimed to investigate gene-gene associations of T(H)1 and T( H)2 cytokines genes in Chinese patients with SLE. Twenty single nucleotide polymorphisms (SNPs) in eight cytokines genes were genotyped in 110 SLE patients and 138 healthy controls in a case-control association study. The minor allelic frequencies of interleukin4(IL4) -590 T/C, -33 T/C, 9241C/G, and IL10 -592 A/C were significantly increased in SLE patients compared with those in controls (p < 0.05). None of the separate 20 SNPs showed significant association with SLE after Bonferroni correction. An IL4 haplotype -590C/-33C/9241G/14965C was significantly associated with SLE (odds ratio 3.7, 95% confidence interval [CI] 1.5-8.9, p = 0.004, Bonferroni-corrected p = 0.024). A borderline significant three-locus gene-gene interaction among IL4 9241 C/G, IL4 -33 T/C, signal transducer and activator of transcription 6, IL4-induced (STAT6) 2892 C/T was detected by a multifactor dimensionality reduction test (p = 0.051). However, the presence of two at-risk genotypes lead to increased risk of SLE for two-locus interaction using logistic regression method. The risk of SLE increased significantly when a subject has two at-risk genotypes for IL4 -590C and STAT6 2892C (odds ratio, 3.24, 95% CI 1.5-7.0, p = 0.003, Bonferroni-corrected p = 0.009), IL4 -33C and STAT6 2892C (odds ratio 3.06, 95% CI 1.4- 6.7, p = 0.005, Bonferroni-corrected p = 0.015), as well as IL4 9241G and STAT6 2892C (odds ratio 3.34, 95% CI 1.6-7.1, p = 0.002, Bonferroni-corrected p = 0.006). Further, plasma IL-4 concentrations were significantly lower in SLE patients than in healthy controls (1.59 + 3.53 versus 5.67 + 11.28 pg/ml, p = 0.042). These results indicated that IL4 and STAT6 genes might be involved in the etiology of SLE and potentially increased SLE risk through their interaction effect in Chinese patients.


Asunto(s)
Predisposición Genética a la Enfermedad , Interleucina-4/genética , Lupus Eritematoso Sistémico/genética , Factor de Transcripción STAT6/genética , Alelos , Pueblo Asiatico/genética , China , Femenino , Frecuencia de los Genes , Genotipo , Humanos , Interleucina-4/sangre , Modelos Logísticos , Masculino , Polimorfismo de Nucleótido Simple , Riesgo
10.
Epidemiol Infect ; 137(8): 1111-20, 2009 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-19192321

RESUMEN

Campylobacter jejuni of different subtypes were identified in chicken, dairy cattle and diarrhoea patients in China from 2005 to 2006, using multiplex PCR and RFLP. The results indicated that, of the three types of samples, C. jejuni was most frequently detected in poultry of the three types of samples, with an average isolation rate of up to 18.61% and a flock contamination rate of 86.67%. The average incidence of C. jejuni in overall cattle and environmental samples, milk cows, heifers and diarrhoea patients was 7.77, 5.02, 8.70 and 4.84%, respectively. A higher prevalence was detected in outpatients than ward patients (P<0.01), and in patients aged <7 years than in older patients (P<0.01). The 265 isolates of C. jejuni were classified into 20 distinct types by PCR-RFLP analysis of the flaA gene, with the genotype distribution in humans overlapping that in poultry and cattle. This suggests that certain C. jejuni strains circulate between humans and domestic animals such as cattle and poultry.


Asunto(s)
Infecciones por Campylobacter/veterinaria , Campylobacter jejuni/aislamiento & purificación , Enfermedades de los Bovinos/epidemiología , Diarrea/epidemiología , Enfermedades de las Aves de Corral/epidemiología , Animales , Infecciones por Campylobacter/epidemiología , Campylobacter jejuni/genética , Bovinos , Pollos , Niño , China/epidemiología , Industria Lechera , Diarrea/microbiología , Genotipo , Humanos , Vigilancia de la Población , Prevalencia
11.
Lupus ; 16(12): 929-38, 2007.
Artículo en Inglés | MEDLINE | ID: mdl-18042586

RESUMEN

Several interpretations have been made regarding the specificity of antiphospholipid antibodies and antibodies against oxidized low-density lipoprotein (oxLDL), but these are still controversial. In the present study, we delineated specificity of these two types of antibodies and analyzed their regulatory effect on oxLDL and/or beta( 2)-glycoprotein I (beta(2)GPI) binding to macrophages. Scavenger receptor-mediated binding of oxLDL (or its beta(2)GPI complexes) to macrophages was observed and the binding was partly prevented by beta( 2)GPI. The IgG monoclonal anti-beta(2)GPI antibody (WB-CAL-1), which was derived from NZW x BXSB F1 mouse (a model of antiphospholipid syndrome), significantly increased the oxLDL/beta(2)GPI binding to macrophages. In contrast, IgM anti-oxLDL natural antibody, EO6 (derived from apoe( -/-) mouse), prevented the binding. Different antigenic specificity of these antibodies to oxLDL and its beta(2)GPI complexes was also confirmed in TLC-ligand blot and ELISA. Thus, IgG anti-beta(2) GPI autoantibodies contribute to lipid metabolism (housekeeping of oxLDL by macrophages) whereas IgM natural anti-oxLDL antibodies may protect against atherogenesis. In addition, in vitro data suggest that relatively high dose of intravenous immunoglobulin preparations (mainly contain IgG anti-oxLDL antibodies) might also prevent atherogenesis by inhibiting the oxLDL binding to macrophages.


Asunto(s)
Anticuerpos Antifosfolípidos/fisiología , Síndrome Antifosfolípido/inmunología , Aterosclerosis/inmunología , Lipoproteínas LDL/inmunología , Macrófagos/fisiología , beta 2 Glicoproteína I/fisiología , Animales , Especificidad de Anticuerpos , Línea Celular , Humanos , Inmunoglobulina G/inmunología , Inmunoglobulina G/fisiología , Inmunoglobulina M/inmunología , Inmunoglobulina M/fisiología , Inmunoglobulinas Intravenosas/inmunología , Lipoproteínas LDL/metabolismo , Macrófagos/inmunología , Ratones
13.
J Endocrinol Invest ; 30(6): 451-8, 2007 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-17646718

RESUMEN

BACKGROUND: Sex hormone decline remarkably decreases metabolic function in elderly men. Many degenerative diseases may relate to testosterone deficiency. OBJECTIVE: To evaluate the serum testosterone concentration in elderly men, its related metabolic and inflammatory factors, and the relationship of metabolic syndrome to testosterone levels. METHODS: 381 elderly men (78.8+/-4.1 yr old) residing in a veterans' nursing home were enrolled. We measured body height and weight, waist and hip circumferences, body fat, blood pressure, blood glucose and insulin, glycosylated hemoglobin (HbA1c), lipid profile, complete blood count, high sensitivity C-reactive protein (hsCRP), total testosterone, and SHBG. Free testosterone was calculated by Nanjee-Wheeler's method. RESULTS: Serum total testosterone levels were 0.20-15.74 ng/ml (free testosterone 11.78-478.31 pmol/l). Total testosterone correlated negatively with body mass index (BMI), waist-hip ratio, body fat, blood glucose, blood insulin, HbA1c, serum triglyceride, white blood cell (WBC) count and hsCRP; but positively with HDL-cholesterol (HDL-C) and hemoglobin. Multiple regression stepwise forward analysis revealed that BMI values, fasting blood glucose, WBC count, fasting hsCRP and hemoglobin were independent factors related to total testosterone. Furthermore, total testosterone is lower in elderly men with metabolic syndrome, according to National Cholesterol Education Program criteria with a modification of waist circumference. However, free testosterone plays a small role in association with metabolic factors in this elderly men's population. CONCLUSION: Total testosterone level is significantly related to metabolic and inflammatory factors in elderly men. Low total testosterone may be a significant indicator for development of metabolic syndrome in elderly men.


Asunto(s)
Envejecimiento/fisiología , Metabolismo Energético , Testosterona/sangre , Anciano , Anciano de 80 o más Años , Índice de Masa Corporal , Estudios Transversales , Humanos , Inflamación/metabolismo , Masculino , Análisis de Regresión
14.
Appl Microbiol Biotechnol ; 74(1): 61-8, 2007 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-17043817

RESUMEN

The nutritional requirements for acetoin production by Bacillus subtilis CICC 10025 were optimized statistically in shake flask experiments using indigenous agroindustrial by-products. The medium components considered for initial screening in a Plackett-Burman design comprised a-molasses (molasses submitted to acidification pretreatment), soybean meal hydrolysate (SMH), KH(2)PO(4).3H(2)O, sodium acetate, MgSO(4).7H(2)O, FeCl(2), and MnCl(2), in which the first two were identified as significantly (at the 99% significant level) influencing acetoin production. Response surface methodology was applied to determine the mutual interactions between these two components and optimal levels for acetoin production. In flask fermentations, 37.9 g l(-1) acetoin was repeatedly achieved using the optimized concentrations of a-molasses and SMH [22.0% (v/v) and 27.8% (v/v), respectively]. a-Molasses and SMH were demonstrated to be more productive than pure sucrose and yeast extract plus peptone, respectively, in acetoin fermentation. In a 5-l fermenter, 35.4 g l(-1) of acetoin could be obtained after 56.4 h of cultivation. To our knowledge, these results, i.e., acetoin yields in flask or fermenter fermentations, were new records on acetoin fermentation by B. subtilis.


Asunto(s)
Acetoína/metabolismo , Bacillus subtilis/crecimiento & desarrollo , Biotecnología/métodos , Medios de Cultivo/química , Glycine max/metabolismo , Melaza , Hidrolisados de Proteína/metabolismo , Bacillus subtilis/metabolismo , Fermentación , Modelos Biológicos , Proyectos de Investigación
15.
Appl Microbiol Biotechnol ; 73(3): 512-8, 2006 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-16802153

RESUMEN

2,3,5,6-Tetramethylpyrazine (TTMP) was produced using a newly isolated Bacillus mutant. Culture medium optimization studies showed that soytone, an enzyme-hydrolysate of soybean meal, with the supplementation of vitamins, can fully replace yeast extract plus peptone in supporting TTMP production from glucose. In a 5-l fermenter, using the optimized medium which contained 20% glucose, 5% soytone, 3% (NH(4))(2)HPO(4), and vitamin supplements, fermentations were carried out with stirring at 700 rpm, air flow at 1.0 vvm, controlled pH at 7.0, and temperature at 37 degrees C. TTMP reached 4.33 g l(-1) after 64.6 h cultivation. A product recovery method was described, which involved evaporation, crystallization, and lyophilization. The product purity was 99.88%, determined by GC with the normalization method. The main impurities were 2,3,5-trimethylpyrazine (0.09%) and 2-ethyl-3,5,6-trimethylpyrazine (0.02%), which were identified by GC/MS. (13)C NMR determination also gave a consistent result. Natural and high purity of the product and the utilization of cheap green renewable materials make this process promising to compete with TTMP chemical synthetic methods.


Asunto(s)
Bacillus/metabolismo , Glucosa/metabolismo , Pirazinas/metabolismo , Bacillus/clasificación , Bacillus/genética , Bacillus/crecimiento & desarrollo , Medios de Cultivo/química , Fermentación , Mutación , Pirazinas/aislamiento & purificación , Vitaminas
16.
J Oral Rehabil ; 33(3): 183-93, 2006 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-16512884

RESUMEN

The purpose of this study was to provide more information about the morphological characteristics of the craniofacial complex in mandibular prognathism. Forty young adult males having mandibular prognathism were compared with 40 having normal occlusion. This was conducted to carry out geometric morphometric assessments to localize alterations, using Procrustes analysis and thin-plate spline analysis, in addition to conventional cephalometric techniques. Procrustes analysis indicated that the mean craniofacial, midfacial and mandibular morphology was significantly different in prognathic subjects compared with normal controls. This finding was corroborated by the multivariate Hotelling T(2)-test of cephalometric variables. Mandibular prognathism demonstrated a shorter and slightly retropositioned maxilla, a greater total length and anterior positioning of the mandible. Thin-plate spline analysis revealed a developmental diminution of the palatomaxillary region anteroposteriorly and a developmental elongation of the mandible anteroposteriorly, leading to the appearance of a prognathic mandibular profile. In conclusion, thin-plate spline analysis seems to provide a valuable supplement for conventional cephalometric analysis because the complex patterns of craniofacial shape change are visualized suggestive by means of grid deformations.


Asunto(s)
Mandíbula/patología , Maxilar/patología , Prognatismo/patología , Adulto , Cefalometría/métodos , Humanos , Masculino , Maloclusión de Angle Clase III/patología , Hueso Paladar/patología , Cráneo/patología , Alveolo Dental/patología
17.
J Oral Rehabil ; 32(10): 720-8, 2005 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-16159349

RESUMEN

The aim of this study was to investigate the treatment effects on the maxillofacial complex by maxillary protraction combined with chin cup therapy among growing children. An effective geometric morphometric assessment of cephalometric radiographs, using Procrustes analysis and thin-plate spline analysis, was applied to evaluate shape change in the craniofacial and midfacial configurations of a treated sample of 20 children with skeletal Class III malocclusion. This was compared with matched untreated skeletal Class III controls. Marked treatment induced change involved the maxilla and the mandible. Major deformation consisted of forward advancement of the maxillary complex with negligible rotation of the palatal plane and a forward direction of growth of the mandibular condyle associated with a restriction in sagittal advancement of the chin. Considerable dentoalveolar components contributed to the correction of anterior crossbite. Further detailed study of skeletofacial remodelling in response to maxillary protraction in other skeletal components, including the cranial base and the mandibular complex that contribute to Class III skeletal discrepancies, is warranted.


Asunto(s)
Maloclusión de Angle Clase III/terapia , Mandíbula/patología , Maxilar/patología , Cefalometría/métodos , Niño , Aparatos de Tracción Extraoral , Huesos Faciales/patología , Femenino , Humanos , Masculino , Maloclusión de Angle Clase III/patología , Cóndilo Mandibular/patología , Desarrollo Maxilofacial/fisiología , Hueso Paladar/patología , Resultado del Tratamiento
18.
J Oral Rehabil ; 32(9): 642-7, 2005 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-16102076

RESUMEN

There is insufficient evidence in conventional cephalometric analysis of the actual sites of putative maxillofacial change in Class II and Class III malocclusions. The purpose of this study was to provide more information about the morphological characteristics of the midfacial complex and mandible in children with Class II or III malocclusions. Seventy children with Class II, division 1 malocclusion and 70 children with Class III malocclusion were compared with 70 children with normal occlusion. This study was conducted to carry out geometric morphometric assessments to localize alterations using Procrustes analysis and thin-plate spline analysis. Procrustes analysis indicated the midfacial and mandibular morphologies differed between normal occlusion subjects and subjects with Class II or Class III malocclusion (P<0.0001). The deformations in subjects with Class II malocclusion may represent a developmental elongation of the palatomaxillary complex and a shortening of the mandible anteroposteriorly, which leads to the appearance of a protruding midface and retruding mandibular profile. In contrast, the deformations in subjects with Class III malocclusion may represent a developmental shortening of the palatomaxillary complex and elongation of the mandible anteroposteriorly, which leads to the appearance of a retrognathic midface and prognathic mandibular profile.


Asunto(s)
Maloclusión de Angle Clase III/patología , Maloclusión Clase II de Angle/patología , Anomalías Maxilofaciales/patología , Cefalometría/métodos , Niño , Femenino , Humanos , Masculino , Cóndilo Mandibular/patología , Maxilar/patología , Desarrollo Maxilofacial/fisiología , Hueso Paladar/patología
19.
Anat Embryol (Berl) ; 207(6): 439-51, 2004 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-14767765

RESUMEN

To find out whether close axonal injury resulted in greater free radical risk to cord-projection central neurons than distant ones, we studied the expressions of nitric oxide synthase, calcineurin, and superoxide dismutase in rat rubrospinal neurons following brainstem, C2 and T10 axotomies using immunohistochemical methods. We found that nitric oxide synthase expression was upregulated more following brainstem than C2 lesion while T10 lesion triggered no detectable changes. This response peaked at 1 week and returned to control level by 8-week-post-injury. At the same time, calcineurin, which activated nitric oxide synthase, was increased 1 week following brainstem and C2 axotomies. These suggest that close, but not distant, axotomy enhanced NO production, which appeared to be cytotoxic since blocking NO synthesis with N-nitro- l-arginine methyl ester reduced brainstem axotomy-induced rubrospinal cell loss. On the other hand, the mitochondrial Mn-superoxide dismutase, which competes with NO to prevent the formation of the cytotoxic free radical peroxynitrite, was notably reduced after brainstem but almost unaltered following C2 axotomy. Meanwhile, the cytosolic Cu/Zn-superoxide dismutase was not altered following C2 but increased after brainstem axotomy. Ultrastructurally, in rubrospinal neurons more mitochondria became swollen following brainstem than C2 axotomy. Based on these, we proposed that besides the NO-overproduction-induced toxicity, superoxide-loading-induced mitochondrial damage also added to hampering the survival of the closely axotomized neurons.


Asunto(s)
Axones/fisiología , Radicales Libres/metabolismo , Neuronas/metabolismo , Núcleo Rojo/metabolismo , Traumatismos de la Médula Espinal/metabolismo , Médula Espinal/metabolismo , Animales , Axones/patología , Axotomía/métodos , Calcineurina/metabolismo , Inhibidores Enzimáticos/farmacología , Femenino , Técnicas para Inmunoenzimas , NG-Nitroarginina Metil Éster/farmacología , Neuronas/ultraestructura , Óxido Nítrico/antagonistas & inhibidores , Óxido Nítrico/biosíntesis , Óxido Nítrico Sintasa/antagonistas & inhibidores , Óxido Nítrico Sintasa/metabolismo , Óxido Nítrico Sintasa de Tipo I , Ratas , Ratas Wistar , Núcleo Rojo/efectos de los fármacos , Núcleo Rojo/patología , Médula Espinal/efectos de los fármacos , Médula Espinal/patología , Traumatismos de la Médula Espinal/patología , Superóxido Dismutasa/metabolismo , Factores de Tiempo , Regulación hacia Arriba
20.
Dentomaxillofac Radiol ; 31(2): 137-41, 2002 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-12076055

RESUMEN

We describe two cases of Class III malocclusion with and without orthodontic treatment. A thin-plate spline (TPS) analysis of lateral cephalometric radiographs was used to visualize transformations of the mandible. The actual sites of mandibular skeletal change are not detectable with conventional cephalometric analysis. These case analyses indicate that specific patterns of mandibular transformation are associated with Class III malocclusion with or without orthopaedic therapy, and visualization of these deformations is feasible using TPS graphical analysis.


Asunto(s)
Cefalometría/métodos , Procesamiento de Imagen Asistido por Computador/métodos , Maloclusión de Angle Clase III/diagnóstico por imagen , Mandíbula/diagnóstico por imagen , Cefalometría/estadística & datos numéricos , Niño , Mentón/diagnóstico por imagen , Dentición Mixta , Aparatos de Tracción Extraoral , Estudios de Factibilidad , Estudios de Seguimiento , Humanos , Incisivo/diagnóstico por imagen , Masculino , Maloclusión de Angle Clase III/patología , Maloclusión de Angle Clase III/terapia , Mandíbula/patología , Cóndilo Mandibular/diagnóstico por imagen , Ortodoncia Correctiva , Faringe/diagnóstico por imagen , Prognatismo/diagnóstico por imagen , Prognatismo/patología , Prognatismo/terapia , Radiografía
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA
...