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1.
Braz. j. med. biol. res ; 54(9): e10700, 2021. tab, graf
Article in English | LILACS | ID: biblio-1249336

ABSTRACT

It was previously demonstrated that the methanol fraction of Sideroxylon obtusifolium (MFSOL) promoted anti-inflammatory and healing activity in excisional wounds. Thus, the present work investigated the healing effects of MFSOL on human keratinocyte cells (HaCaT) and experimental burn model injuries. HaCaT cells were used to study MFSOL's effect on cell migration and proliferation rates. Female Swiss mice were subjected to a second-degree superficial burn protocol and divided into four treatment groups: Vehicle, 1.0% silver sulfadiazine, and 0.5 or 1.0% MFSOL Cream (CrMFSOL). Samples were collected to quantify the inflammatory mediators, and histological analyses were performed after 3, 7, and 14 days. The results showed that MFSOL (50 μg/mL) stimulated HaCaT cells by increasing proliferation and migration rates. Moreover, 0.5% CrMFSOL attenuated myeloperoxidase (MPO) activity and also stimulated the release of interleukin (IL)-1β and IL-10 after 3 days of treatment. CrMFSOL (0.5%) also enhanced wound contraction, promoted improvement of tissue remodeling, and increased collagen production after 7 days and VEGF release after 14 days. Therefore, MFSOL stimulated human keratinocyte (HaCaT) cells and improved wound healing via modulation of inflammatory mediators of burn injuries.


Subject(s)
Humans , Female , Burns/drug therapy , Sapotaceae , Proline , Keratinocytes , Plant Leaves , Methanol
2.
Braz. j. med. biol. res ; 47(8): 706-714, 08/2014. tab, graf
Article in English | LILACS | ID: lil-716271

ABSTRACT

The main purpose of this study was to investigate the level of agreement between the gas exchange threshold (GET) and heart rate variability threshold (HRVT) during maximal cardiopulmonary exercise testing (CPET) using three different exercise modalities. A further aim was to establish whether there was a 1:1 relationship between the percentage heart rate reserve (%HRR) and percentage oxygen uptake reserve ( % V ˙ O 2  R ) at intensities corresponding to GET and HRVT. Sixteen apparently healthy men 17 to 28 years of age performed three maximal CPETs (cycling, walking, and running). Mean heart rate and V ˙ O 2 at GET and HRVT were 16 bpm (P<0.001) and 5.2 mL·kg-1·min-1 (P=0.001) higher in running than cycling, but no significant differences were observed between running and walking, or cycling and walking (P>0.05). There was a strong relationship between GET and HRVT, with R2 ranging from 0.69 to 0.90. A 1:1 relationship between %HRR and % V ˙ O 2  R was not observed at GET and HRVT. The %HRR was higher during cycling (GET mean difference=7%; HRVT mean difference=11%; both P<0.001), walking (GET mean difference=13%; HRVT mean difference=13%; both P<0.001), or running (GET mean difference=11%; HRVT mean difference=10%; both P<0.001). Therefore, using HRVT to prescribe aerobic exercise intensity appears to be valid. However, to assume a 1:1 relationship between %HRR and % V ˙ O 2  R at HRVT would probably result in overestimation of the energy expenditure during the bout of exercise.


Subject(s)
Adolescent , Adult , Humans , Male , Young Adult , Bicycling/physiology , Heart Rate/physiology , Pulmonary Gas Exchange/physiology , Running/physiology , Walking/physiology , Anaerobic Threshold/physiology , Exercise Test/methods , Exercise/physiology , Oxygen Consumption/physiology , Physical Endurance/physiology
3.
Rev. chil. pediatr ; 83(1): 58-67, feb. 2012. ilus
Article in Spanish | LILACS | ID: lil-627468

ABSTRACT

Background: Children with Down's Syndrome (DS) present a higher incidence of Acute Lymphoblastic Leukemia (ALL) with more complications and shorter survival than healthy children. Objective: To describe clinical characteristics, laboratory and treatment results in patients with DS and ALL. Patients and Method: Retrospective analysis of 42 DS and ALL patients treated in three consecutive trials (1992,1996,2002) from the Pediatric National Cancer Program (PINDA). Clinical data, immunophenotype, cytogenetics and treatment results were analyzed. Results: There was no difference by age or gender, no patient presented LLA-T, t (9;22) o t (4;11). Of the 42 patients, 38 patients went into remission, 10 relapsed (26,3 percent, 11 died because of infection, none died from other toxicity. Survival at 5 years was 35 +/- 9 percent (median of follow-up was 50 mo), similar for all protocols (p = 0,61). Conclusion: The group of patients with ALL and DS evaluated was not associated with classic treatment resistance factors. The relapse rate was not increased, if compared with non DS ALL patients; in this group the infections were the determinant factor for a lower survival. These patients can be treated with the current trials but they require a detailed infection care.


Los niños con Síndrome de Down (SD) tienen mayor incidencia de leucemia linfoblástica aguda (LLA) con más complicaciones y menor sobrevida que los niños sin SD. Objetivo: Describir características clínicas, de laboratorio y resultados de tratamiento en niños con SD y LLA. Pacientes y Método: Análisis retrospectivo de 42 pacientes con LLA y SD tratados en 3 protocolos consecutivos (1992, 1996 y 2002) del Programa Nacional de Cáncer Infantil (PINDA). Se analizaron datos clínicos, de laboratorio, inmunofenotipo, citogenética y resultados de tratamiento. Resultados: La distribución por género o grupo etario no mostró diferencias, ningún paciente presentó LLA-T, t (9;22) o t (4;11). De los 38 pacientes que remitieron, 10 recayeron (26,3 por ciento), fallecieron por infección 11/42 (26,2 por ciento). Ninguno falleció por otra toxicidad. La sobrevida libre de eventos global a 5 años fue 35 +/- 9 por ciento (mediana de seguimiento 50 meses), siendo similar en los diferentes protocolos usados (p = 0,61). Conclusión: Los pacientes evaluados con SD y LLA no presentaron factores clásicos de resistencia a tratamiento. No se observó mayor frecuencia de recaída respecto a los pacientes con LLA sin SD y la menor sobrevida en este grupo fue determinada por infecciones. Estos pacientes pueden ser tratados con los protocolos actuales pero requieren un manejo precoz e intensivo de las infecciones.


Subject(s)
Humans , Male , Female , Child , Precursor Cell Lymphoblastic Leukemia-Lymphoma/complications , Precursor Cell Lymphoblastic Leukemia-Lymphoma/drug therapy , Down Syndrome/complications , Chile , Cytogenetics , Disease-Free Survival , Immunophenotyping , Incidence , Precursor Cell Lymphoblastic Leukemia-Lymphoma/epidemiology , Precursor Cell Lymphoblastic Leukemia-Lymphoma/genetics , Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Remission Induction , Risk Assessment , Treatment Outcome
4.
Rev. argent. cir. cardiovasc. (Impresa) ; 9(1): 28-40, ene.-abr. 2011. ilus, tab
Article in Spanish | LILACS | ID: lil-690457

ABSTRACT

Antecedentes: El incremento de la violencia ciudadana por el uso de armas de fuego y blancas en delitos comunes y los accidentes por exceso de velocidad sin medidas de seguridad adecuadas, han producido un aumento en la incidencia de los traumas vasculares, siendo la mayor causa de muerte en pacientes jóvenes. Objetivo: Demostrar nuestra casuística y experiencia en el manejo del trauma vascular así como su resolución. Diseño: Análisis descriptivo y retrospectivo de los últimos 10 años. Material y Método: 470 pacientes se tra taron desde el 1 de enero de 2000 hasta el 31 diciembre del 2009. Se analizó la composición demográfica, el mecanismo lesional, la región afectada y la técnica quirúrgica utilizada. El 86,6% fue de sexo masculino y el 13,4% de sexo femenino. La edad promedio fue de 26,9 años. El 69,5% presentaron trauma penetrante y el 30,5% trauma contuso. El 4,5% presentaron lesiones de cuello, 12% torácicas, 14,9% lesiones abdominales y nuestra mayor casuística fue la lesión de los miembros: 68,6%. En 175 pacientes, la técnica fue el bypass (119 venosos y 56 protésicos ). 206 pacientes recibieron resección y anastomosis término-terminal y 36 pacientes fueron tratados con ligadura primaria. Como métodos endovasculares se colocaron 5 endoprótesis por ruptura traumática de aorta torácica, 3 stents periféricos y se realizó un reimplante de mano. Resultados: La mortalidad global fue del 7,8% (37 pacientes) en la mayoría de los casos debido al politrauma, Crush síndrome, SIRS y/o shock séptico. En cuanto a los pacientes con RTAT, uno presentó óbito por falla del material. El 9,1% de los pacientes sufrieron amputación del miembro (38 pacientes) de los cuales 9 fueron por arrancamiento del miembro, 11 amputaciones primarias y 18 secundarias. Del total de pacientes que presentaron lesiones vasculares de los miembros, 60 (5,8%) recibieron fasciotomía pre, intra o post-revascularización. Conclusiones: Nuestra aceptable morbimortalidad depende de la rapidez y ...


Antecedentes: O aumento da violência nas cidades, o uso de armas de fogo e armas brancas em delitos comuns, e os acidentes por excesso de velocidade sem medidas de segurança adequadas, têm produzido um aumento na incidência dos traumas vasculares, sendo esta, a maior causa de morte em pacientes jovens. Objetivo: Demonstrar nossa especificidade e experiência no tratamento do trauma vascular, como também em sua resolução. Desenho: Análise descritiva e retrospectiva dos últimos 10 anos. Material e Método: 470 pacientes foram tratados de 1º de janeiro de 2000 a 31 de dezembro de 2009. Analisou-se a composição demográfica, o mecanismo de lesão, a região afetada e a técnica cirúrgica utilizada. 86, 6 % dos pacientes eram do sexo masculino e 13,4 % do sexo feminino. A idade média foi de 26,9 anos. 69,5 % apresentaram trauma penetrante e 30,5 % trauma contuso. 4,5 % apresentaram lesões no pescoço, 12 % torácicas, 14,9 % lesões abdominais e a nossa maior especificidade, em 68,6% dos casos, foi a lesão de membros. Em 175 pacientes a técnica foi o bypass (119 venosos e 56 com próteses ). 206 pacientes receberam ressecção e anastomose término-terminal e 36 pacientes foram tratados com ligadura de tipo primário. Como métodos endovasculares, foram colocadas 5 endopróteses por ruptura traumática de Aorta torácica, 3 stents periféricos, e realizou-se um reimplante de mão. Resultados: A mortalidade global foi de 7,8 % (37 pacientes), na maioria dos casos devido ao politrauma, síndrome de Cushing, SIRS (síndrome da resposta inflamatória sistêmica), e/ou choque séptico. Quanto aos pacientes com RTAT, um deles apresentou óbito por falha do material. 9,1 % dos pacientes sofreram amputação de membro (38 pacientes), dos quais 9 foram por arrancamento de membro, 11 amputações primárias e 18 secundárias. Do total de pacientes que apresentaram lesões vasculares de membros, 60 (5,8 %) receberam fasciotomia pré, intra ou pós revascularização. Conclusões: Nossa aceitável ...


Background: The increase of the urban violence due to the use of fire and white weapons in common crimes as well as the accidents because of the excess of speed without the corresponding safe security measures have produced an increase in the incidence of the vascular traumas, being the most important cause of death in young patients. Objective: To show casuisty and experience in the management of the vascular trauama as well as its resolution. Design: Descriptive and retrospective analyses during the last 10 years. Material and Method: 470 patients were treated from January 1, 2000 up to December 2009. The demographic composition, the lesional mechanism, the affected area and the surgical technique were analysed. The 86.6% were male and the 13.4% female. The average age was 26.9%. The 69.5% have presented penetrant trauma and the 30.5% blunt trauma. The 4.5% have presented injuries on the neck, 12% thoracic ones, 14.9% abdominal ones and our greatest casuistic was the injueries on the arms. In 175 patients the technique was the bypass (119 venous and 56 prothetic ones). 206 patients have received resection and termino-terminal anastomosis and 36 patients were treated with primary binding. As endovascular methods, 5 stents for traumatic rupture of thoracic aorta, 3 peripheral stents and a hand reimplantation were used. Results: The global mortality was of the 7.8% 37 patients), in most of the cases due to the poly-trauma, Crush syndrome, SIRS, and/or septic shock. Regarding to the patients with RTAT, on of them, death has been presented due to material failure. The 9.1% of the patients have suffered from amputation of the member (38 patients), from whom 9 of them were for pulling member, 11 for primary amputations and 18 secondary ones. From the total of the patients that have presented vascular injuries of the members, 60 (5.8%) have received fasciotomy pre, intra or post revascularization. Conclusions: Our acceptable mortality depends on the quickness and ...


Subject(s)
Humans , Male , Female , Arteries/injuries , Wounds, Penetrating/surgery , Wounds, Gunshot/surgery , Vascular System Injuries/surgery , Endovascular Procedures , Thoracic Injuries , Accidents, Traffic , Arteries/surgery , Vascular Surgical Procedures/methods , Crush Syndrome
5.
Int. j. odontostomatol. (Print) ; 1(1): 7-15, jul. 2007. ilus
Article in Spanish | LILACS | ID: lil-530276

ABSTRACT

La regulación del crecimiento y desarrollo cráneo-facial está controlada por una serie de interacciones celulares y con la matriz extracelular que estimulan los procesos de proliferación y diferenciación. De fundamental importancia es la cresta neural, una población de células especializadas de células progenitoras que generan los huesos, cartílagos y tejido conectivo de la región. La mandíbula se forma por osificación membranosa en el mesénquima del primer arco faríngeo, pero desarrolla cartílagos secundarios como centros de crecimiento en el cóndilo, en el proceso coronoídeo, en el ángulo mandibular y en la sutura intermaxilar (sínfisis). Estos cartílagos difieren en su origen, su estructura histológica y su respuesta a factores hormonales, metabólicos y mecánicos con respecto a los cartílagos de los huesos largos. Debido a que las células proliferativas son mesenquimáticas y no cartilaginosas, los mecanismos celulares y moleculares que regulan el crecimiento en los cartílagos secundarios, son todavía muy poco conocidos. Los productos génicos BMP (proteina morfogenética de hueso), Ihh (Indian hedgehog), FGF (factor de crecimiento de fibroblastos), Sox-9 y VEGF (factor de crecimiento vascular endotelial) son de gran importancia en el crecimiento mandibular. Este trabajo resume la información reciente acerca de los factores de crecimiento y factores de transcripción, potenciales reguladores del proceso de osificación membranosa y del crecimiento de los cartílagos secundarios de la mandíbula.


Regulation of growth and craniofacial development is controlled by the interactions of cells with each other and with the extracellular environment through signal transduction pathways that control the differentiation process by stimulating proliferation or causing cell death. Of fundamental importance to mandibular development is the neural crest, a specialized population of stem and progenitor cells which generate the bone, cartilage and conjunctive tissue of the first branchial arch. The mandible arises by intramembranous ossification, but develops secondary cartilages as growth centers. Secondary cartilages of the mandible arise in the condylar process, in the coronoid process, angular process of the mandible, and in the intermandibular suture (mental symphysis). These are different, not only in their origins, but in their histologic organization and in their response to hormonal and mechanical factors with articular cartilages of long bones. Because the cells that divide to effect growth and adaptation in these cartilages are of perichondrial/periosteal rather than chondrogenic origin, the cellular and molecular mechanisms that regulate their growth are only beginning to be understood. The main differences of secondary cartilages from cartilages of the limbs and cranial base are, that condylar condroblasts arise from undifferentiated conjuntive cells and the appearance of vascular canals that cross cartilage perpendicularly and connect with the ossification zone. Collagen type I seems to be more important in this process than collagen type II. BMP signaling maintains regulatory roles in skeletons and skeletal growth. Indian hedgehog, Sox-9, fibroblastic growth factor (FGF) and vascular endothelial growth factor (VEGF), are also important in mandibular growth. This article summarizes information regarding growth factors and transcription proteins that are potential growth regulators in these secondary cartilages.


Subject(s)
Humans , Mandible/growth & development , Chondrogenesis , Cartilage/growth & development , Mandibular Condyle/growth & development , Vascular Endothelial Growth Factor A/metabolism , Fibroblast Growth Factors/metabolism , Osteogenesis , Hedgehog Proteins/metabolism , Bone Morphogenetic Proteins/metabolism , Transcription Factors
6.
Braz. j. med. biol. res ; 37(5): 729-736, May 2004. tab, graf
Article in English | LILACS | ID: lil-357543

ABSTRACT

Patients with polycystic ovary syndrome (PCOS) usually are obese, insulin resistant and hyperinsulinemic. The known association between leptin, obesity andinsulin action suggests that leptin may have a role in PCOS but this has only been addressed peripherally. This study was designed to assess the relationship between serum leptin and the anthropometric, metabolic and endocrine variables of obese (body mass index, BMI > or = 30 kg/mý) and non-obese (BMI <30 kg/mý) PCOS patients. Twenty-eight PCOS patients and 24 control women subdivided into obese and non-obese groups were evaluated. Leptin, androgens, lipids, gonadotrophins and insulin-glucose response to the oral glucose tolerance test were measured by radioimmunoassay in all participants. The assays were done all in one time. The areas under the insulin curve (AUC-I) and the glycemia curve were calculated to identify patients with insulin resistance. Mean leptin levels were not significantly higher in patients with PCOS compared to the control group (21.2 ñ 10.2 vs 27.3 ñ 12.4 ng/ml). Leptin levels were found to be significantly higher in the obese subgroups both in patients with PCOS (26.9 ñ 9.3 vs 14.1 ñ 7.0 ng/ml) and in the control group (37.3 ñ 15.5 vs 12.9 ñ 5.8 ng/ml). The leptin of the PCOS group was correlated with BMI (r = 0.74; P < 0.0001) and estradiol (r = 0.48; P < 0.008) and tended to be correlated with the AUC-I (r = 0.36; P = 0.05). Of the parameters which showed a correlation with leptin in PCOS, only estradiol and probably insulinemia (AUC-I) did not show a significant correlation with BMI, suggesting that the other parameters were correlated with leptin due to their correlation with BMI. Estradiol correlated with leptin in PCOS patients regardless of their weight.


Subject(s)
Humans , Female , Adolescent , Adult , Estradiol , Insulin Resistance , Leptin , Obesity , Polycystic Ovary Syndrome/blood , Biomarkers , Body Constitution , Body Mass Index , Case-Control Studies , Prospective Studies
7.
Rev. Fac. Cienc. Méd. (Córdoba) ; 60(2): 72-76, 2003. ilus
Article in Spanish | LILACS | ID: lil-356907

ABSTRACT

INTRODUCTION: Carotid lesions require priority in both evaluation and treatment due to their high morbidity and mortality. Controversy about therapeutic behavior in these patients with or without central neurological deficit is still under in discussion. OBJECTIVES: To present a patient with acute carotid thrombosis due to a shotgun wound and discuss its therapeutic behavior. SETTING: Hospital de Urgencias in Córdoba city. MATERIAL AND METHODS: A 15-year-old male patient is presented with a point-blank shotgun wound in the soft parts of the left cervical region, and a left carotid thrombosis with no central neurological deficit. RESULTS: Wound toilette and carotid revascularization by means of resection and venous by-pass with external carotid ligature was performed. The procedure was finished by delaging for plastic reconstruction of the cervical injury. Carotid postoperative angiographic control showed good permeability with no carotid flow alteration. CONCLUSION: Penetrating carotid injuries should be resolved, if technically possible, with revascularization of the carotid sector. This procedure has to be aborted if the patient is in coma or the lesion is difficult to repair, in such a case ligature should be carried out.


Subject(s)
Humans , Male , Carotid Artery Thrombosis , Wounds, Gunshot , Acute Disease , Angiography , Carotid Artery Thrombosis , Vascular Surgical Procedures
10.
Acta gastroenterol. latinoam ; 27(1): 39-42, mar. 1997. ilus, tab
Article in Spanish | LILACS | ID: lil-196662

ABSTRACT

The microcystic serous cystadenoma of pancreas or glycogen "rich"cystadenoma is a rare entity. Whe studiet five case of this cystadenoma in adult patients ages 47-68 (58 was the mean), four of wich were women (80 percent). The clinical presentation was varied. There was a prevalence of expansive manifestations with epigastric pain in three patients, and extrahepatic bile duct obstruction in other two. A distal tumour was revealed by the diagnostic methodology used (ultrasound and TAC) in three patients, and cephalic tumour in two, with a mean size of 8.8 cm. in diameter. A distal pancreatectomy was performed in two patients, a cephalic pancreatoduodenectomy was performed in one in relation with the presence of extrahepatic bile duct carcinoma, and the other two were treated with a partial cephalic pancreatectomy (enucleation). The nosological diagnose was post-surgical in all case of study. a prognosis for every case was dependat of the associated pathology.


Subject(s)
Middle Aged , Female , Humans , Cystadenocarcinoma, Serous/diagnosis , Pancreatic Neoplasms/diagnosis , Cystadenocarcinoma, Serous/pathology , Cystadenocarcinoma, Serous/surgery , Pancreatic Neoplasms/pathology , Pancreatic Neoplasms/surgery
11.
Odontol. chil ; 44(1): 5-9, jun. 1996. ilus
Article in Spanish | LILACS | ID: lil-200112

ABSTRACT

Para determinar los cambios tisulares que provocan las fuerzas ortodóncicas de alta magnitud se utilizaron 25 ratas Sprague Dowley, a las cuales se les instaló durante 10 días un resorte comprimido que ejercía 150 grs/pond sobre el primer molar superior, de componente mesial y extrusivo. El molar contralateral fue utilizado como control. Obtenidas las muestras fueron procesadas y sometidas a 3 tinciones: hematoxilina-eosina, tricrómico de Masson y picrosirius. Los resultados observados muestran una respuesta de tipo patológico en los tejidos del periodonto de inserción del molar experimental, en los cuales se apreció una gran reabsorción del hueso alveolar, presencia de osteoclastos, células gigantes multinucleadas y reabsorción radicular, sin distinguirse aposición ósea en las áreas de tensión. La respuesta a la fuerza aplicada se extendió a los tejidos de inserción de la pieza vecina, observándose la presencia de reabsorción ósea endóstica y parietal y vasodilatación en la zona cercana al molar experimental


Subject(s)
Animals , Rats , Orthodontic Appliances/adverse effects , Periodontal Ligament/injuries , Bone Resorption/physiopathology , Tooth Movement Techniques/adverse effects , Alveolar Process/physiopathology , Histological Techniques , Microscopy, Polarization/methods , Molar/ultrastructure , Rats, Sprague-Dawley
12.
Odontol. chil ; 44(1): 46-50, jun. 1996. ilus, tab
Article in Spanish | LILACS | ID: lil-200120

ABSTRACT

La fibronectina, glicoproteína presente en la matriz extracelular de los tejidos conjuntivos, juega un importante rol en la diferenciación de los odontoblastos durante el desarrollo dentario. Con el objeto de analizar la reacción de la pulpa dentaria frente a la fibronectina, se realizó un estudio experimental en incisivos de rata. Se confeccionaron cavidades penetrantes en incisivos inferiores de rata, las que se obturaron con hidróxido de calcio (grupo control) y con una solución de fibronectina (1 mg/ml) embebida en un filtro Millipore (grupo experimental). En ambos grupos las cavidades se sellaron con una pasta de óxido de zinc eugenol. Las piezas dentarias fueron extraídas a los 7 días, fijadas en formol al 10 por ciento y descalcificadas. Se realizaron cortes seriados que se tiñeron con hematoxilina-eosina, pirosirius, PAS, y azul de Alcian pH 2.5. Además se evaluó la densidad celular del tejido reparativo. Los resultados mostraron menor reacción inflamatoria y necrótica del tejido pulpar cercano a la cavidad, en el grupo tratado con fibronectina. En estos casos se observó una mayor cantidad de fibroblastos en el tejido reparativo y neoformación de dentina en el 80 por ciento de los casos tratados con fibronectina. Se concluye que la fibronectina produce una moderada reacción pulpar y es capaz de inducir formación de dentina reparativa en incisivos de rata, a la semana de efectuado el tratamiento


Subject(s)
Animals , Rats , Dental Pulp/drug effects , Fibronectins , Dental Pulp Necrosis/chemically induced , Dental Pulp/ultrastructure , Dentin, Secondary , Calcium Hydroxide/pharmacology , Histological Techniques , Incisor/drug effects , Zinc Oxide-Eugenol Cement/pharmacology
13.
Rev. chil. anat ; 14(1): 59-66, 1996. ilus, tab
Article in Spanish | LILACS | ID: lil-189282

ABSTRACT

Se describe en forma comparada la ontogenia del cartílago del primer arco faríngeo y su relación con la formación de la mandíbula, en dos especies: oveja y gato, que presentan diferencias fenotípicas y funcionales a nivel de ese carácter. Se utilizó una muestra de 18 embriones y fetos felinos con un desarrollo entre 20 y 48 días de gestación y 12 fetos ovinos de 27 a 45 días. Un grupo de embriones fue procesado con la técnica de doble tinción "in toto" con alizarina y azul de Alcian, y el otro grupo fue analizado con técnica histológica corriente: hematoxilina eosina-azul de Alcian. En ovinos de 31 a 35 días y felinos de 32 a 39 días, se observa el cartílago diferenciado en sínfisis, centro o cuerpo y componente caudal. Los primeros componentes evidenciaron diferencias entre ambas especies. En la oveja, el centro del cartílago del primer arco no sufre osificación endocondral. La sínfisis mantiene el diámetro y se prolonga para formar el proceso rostral que promueve el crecimiento de la mandíbula. En gatos, la sínfisis es poco desarrollada y la parte anterior del centro del cartílago sufre osificación ondocondral, la que aumenta la distancia transversa entre las mandíbulas derecha e izquierda. Las diferencias encontradas en la estructura del cartílago de Meckel y su diferenciación posterior estarían relacionadas con la forma definitiva de la mandíbula en ovinos (dolicocefálicos) y en felinos (braquiocefálicos).


Subject(s)
Animals , Cattle , Cats , Cats/embryology , Mandible/embryology , Sheep/embryology , Cartilage/embryology , Fetal Development , Gestational Age , Osteogenesis , Branchial Region/embryology
15.
Rev. méd. Chile ; 123(3): 283-91, mar. 1995. tab, ilus
Article in Spanish | LILACS | ID: lil-151182

ABSTRACT

The aim of this study was to identify possible candidate genes for the susceptibility to cleft palate. We studied hyaluronic and glycoprotein levels with morphometric and histochemical techniques, in palatine process of 13 and 14 days old mouse embryos of strains A/Sn and C/57 BL, that are respectively susceptible and resistant to glucocorticoid and non steroid anti-inflammatory drug induced cleft palate. At 13 days, in palatine process of the resistant strain and when these are still vertical, there was a significantly higher amount of extracellular matrix, constituted principally by hyaluronic acid. These differences disappeared at 14 days, when the processes became horizontal. The basal membrane of the medial palatine epithelium of the susceptible strain, showed interruptions due to a lower amount of glycoproteins. It is concluded that the observed differences in the amount and quality of these molecules, are a consequence of genetic differences that could determine the susceptibility to cleft palate


Subject(s)
Animals , Mice , Cleft Palate/genetics , Anti-Inflammatory Agents, Non-Steroidal , Cleft Palate/embryology , Cleft Palate/chemically induced , Glucocorticoids , Cell Count/methods , Histological Techniques
16.
Odontol. chil ; 42(2): 93-7, dic. 1994. ilus, tab
Article in Spanish | LILACS | ID: lil-162963

ABSTRACT

Se realizó un estudio histológico y morfométrico de la inervación pulpar en piezas dentarias con distinto grado de desarrollo radicular. Se utilizaron premolares jóvenes, sanos, extraídos por indicación ortodóncica y con examen radiográfico previo para determinar su grado de desarrollo radicular, clasificándose en 5 niveles. Las piezas dentarias se fijaron en formol al 10 por ciento, se descalcificaron en Ana Morse y se incluyeron en parafina. Cortes seriados de 6 um se tiñeron con hematoxilina-eosina y con las técnicas de Bielschowsky y de Cajal para axones y fibras nerviosas. El recuento de las fibras nerviosas del plexo subodontoblástico de Raschkow, mostró que en los niveles iniciales está escasamente desarrollado, aumentando progresivamente junto con el desarrollo radicular, existiendo un aumento peak entre los niveles 3 y 4. En un mismo nivel se observó mayor desarrollo nervioso en la zona coronaria disminuyendo gradualmente hacia la zona radicular. Los resultados obtenidos se correlacionaron con tests de vitalidad pulpar


Subject(s)
Humans , Male , Female , Adolescent , Dental Pulp/anatomy & histology , Dental Pulp/innervation , Tooth Root/growth & development , Dental Pulp Test
17.
Prensa méd. argent ; 72(12): 417-21, 23 ago. 1985. ilus
Article in Spanish | LILACS | ID: lil-33224

ABSTRACT

Se presentan 25 casos de duodeno-pancreatectomías cefálicas realizadas en 15 carcinomas de cabeza de páncreas, 5 carcinomas de papila de Vater y 5 carcinomas de segunda porción de duodeno. Se analizan aspectos diagnósticos y terapéuticos, sin intentar hacer un estudio comparativo de las tres patologías


Subject(s)
Middle Aged , Humans , Male , Female , Common Bile Duct Neoplasms/surgery , Duodenal Neoplasms/surgery , Pancreatic Neoplasms/surgery
18.
Arq. bras. endocrinol. metab ; 28(3): 77-80, 1984.
Article in Portuguese | LILACS | ID: lil-23210

ABSTRACT

Os autores apresentam um caso unico na literatura medica de galactorreia e hiperprolactinemia devido a presenca de metastase de carcinoma folicular da tiroide para sela turcica. Comentam a localizacao incomum desta metastase e os provaveis aspectos fisiopatologicos envolvidos na producao excessiva de prolactina. Analisam, finalmente, outros sintomas como proptose, amaurose e epistaxe decorrentes da evolucao da metastase


Subject(s)
Middle Aged , Humans , Female , Neoplasm Metastasis , Pituitary Neoplasms , Prolactin , Thyroid Neoplasms , Sella Turcica
19.
Article in Spanish | LILACS | ID: lil-24203

ABSTRACT

En el presente trabajo se analiza la experiencia sobre 37 reintervenciones de via biliar principal por litiasis. Se propone el abordaje del hepatocoledoco de izquierda a derecha, via antro-piloro-duodenal, destacando detalles tecnicos de importancia, sus ventajas en relacion a las tecnicas clasicas y los excelentes resultados obtenidos


Subject(s)
Adult , Middle Aged , Humans , Male , Female , Cholelithiasis , Reoperation , Surgical Procedures, Operative
20.
Rev. argent. cir ; 47(3/4): 118-20, 1984.
Article in Spanish | LILACS | ID: lil-24798

ABSTRACT

Se presentan dos casos de estenosis alta del hepatico comun, iatrogenicas, tratadas con una hepaticoyeyunostomia con reseccion hepatica a lo Champeau. La evolucion alejada ha sido excelente


Subject(s)
Adult , Middle Aged , Humans , Male , Female , Hepatic Duct, Common , Iatrogenic Disease , Jejunum , Surgical Procedures, Operative
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