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1.
Rev. Fac. Odontol. (Córdoba) ; 31(2): 9-13, ago. 2021. ^etab, ^egraf
Article in Spanish | UNISALUD | ID: biblio-1359574

ABSTRACT

El objetivo del presente trabajo fue evaluar el efecto de carboplatino (Cp) en homogenato de glándula submandibular de ratas Wistar a través de la determinación de los niveles de malondialdehido (MDA), como principal producto final de la lipoperoxidación, en un modelo experimental. Se utilizaron 16 ratas Wistar macho de tres meses de edad, alojadas en jaulas individuales, con temperatura e iluminación controlada y dieta libre. Se utilizó un diseño completamente aleatorizado y se establecieron dos grupos experimentales: 1) Control (C), administrándose una dosis intraperitoneal de solución salina durante un día, n: 8, 2) Animales tratados con carboplatino (Cp) aplicándose una dosis i.p. de 100 mg/Kg de peso corporal durante un día, n: 8. Los animales fueron ayunados por 24 horas y posteriormente anestesiados. Seguidamente se extirparon ambas glándulas submandibulares. Se analizaron los niveles de malondialdehido en homogenato de glándula submandibular en ambos grupos experimentales. Las variaciones entre los grupos analizados se evaluaron mediante prueba T de Student para muestras apareadas, fijando un p-valor <0,05 para significación estadística. Proyecto aprobado por CICUAL. Facultad de Ciencias Médicas (UNC). El grupo de Ratas C mostró una concentración de 7.32± 0.48µmol/mg de glándula. El grupo Cp tuvo una concentración de 12.57 ± 0,71 µmol/mg de glándula, expresando una disminución significativa respecto del grupo control p<0.0006. Cp en la dosis ensayada provocaría una disminución de la lipoperoxidación en glándula submandibular de ratas. Posiblemente la batería antioxidante glandular neutralizaría el estrés oxidativo de las células acinares. Estos resultados sugieren evaluar a futuro la actividad de superóxido dismutasa (SOD) y niveles de ácido úrico (AU)


Subject(s)
Rats , Submandibular Gland , Carboplatin , Malondialdehyde
2.
Acta Odontol Latinoam ; 25(3): 262-8, 2012.
Article in English | MEDLINE | ID: mdl-23798072

ABSTRACT

One of the main clinical problems during chemotherapy is the occurrence of severe systemic toxicities, including those related to the stomatognathic system, which contribute to reducing the patient's quality of life. The most frequent oral complications are mucositis, dysgeusia, inflammation, gingival bleeding and decreased salivary flow or hyposalivation, a factor that predisposes to xerostomia, and other local complications that alter the homeostasis of the system. The purpose of this study was to evaluate the functional activity of salivary glands in Wistar rats subject to chemotherapy by measuring salivary flow, glycogen levels and glandular tissue response to autonomic nervous system agonists. Five experimental groups were used: 1) Control group fed "ad libitum"; 2) 5-fluorouracil (20 mg/kg body weight); 3) Calcium leucovorin (10 mg/kg body weight); 4) 5-fluorouracil + calcium leucovorin (20 and 10 mg/kg, respectively) by intraperitoneal injection for five consecutive days and 5) control with paired diet. Groups 1 and 5 did not receive drugs. Treatment with fluorouracil + leucovorin produced an increase in stimulated salivary flow and a higher response to increasing doses of beta agonists compared to other experimental groups. In both groups treated with cytostatic drugs, blocking of glycogen consumption at the end of the experimental period was observed. Our work suggests that salivary secretion may be affected by a dual mechanism: the first would be toxicity induced by 5-FU, which would cause depression of the process of glucose utilization. The second mechanism would affect the sympathetic autonomic reflex arc. In this instance, the synergistic action of 5-FU + LV would have a negative effect on the nerve activity with a reduction of salivary secretion. This would explain the hyposalivation, cited by several authors in patients undergoing the 5-FU + LV scheme in the treatment of colon carcinoma.


Subject(s)
Cytostatic Agents/pharmacology , Fluorouracil/pharmacology , Leucovorin/pharmacology , Submandibular Gland/drug effects , Submandibular Gland/physiopathology , Animals , Male , Rats , Rats, Wistar
3.
Acta odontol. latinoam ; 25(3): 262-268, 2012. graf, tab
Article in English | LILACS | ID: biblio-949680

ABSTRACT

One of the main clinical problems during chemotherapy is the occurrence of severe systemic toxicities, including those related to the stomatognathic system, which contribute to reducing the patient's quality of life. The most frequent oral complications are mucositis, dysgeusia, inflammation, gingival bleeding and decreased salivary flow or hyposalivation, a factor that predisposes to xerostomia, and other local complications that alter the homeostasis of the system. The purpose of this study was to evaluate the functional activity of salivary glands in Wistar rats subject to chemotherapy by measuring salivary flow, glycogen levels and glandular tissue response to autonomic nervous system agonists. Five experimental groups were used: 1) Control group fed "ad libitum"; 2) 5-fluorouracil (20mg/ kg body weight); 3) Calcium leucovorin (10 mg/kg body weight); 4) 5-fluorouracil + calcium leucovorin (20 and 10 mg / kg, respectively) by intraperitoneal injection for five consecutive days and 5) control with paired diet. Groups 1 and 5 did not receive drugs. Treatment with fluorouracil + leucovorin produced an increase in stimulated salivary flow and a higher response to increasing doses of beta agonists compared to other experimental groups. In both groups treated with cytostatic drugs, blocking of glycogen consumption at the end of the experimental period was observed. Our work suggests that salivary secretion may be affected by a dual mechanism: the first would be toxicity induced by 5-FU, which would cause depression of the process of glucose utilization. The second mechanism would affect the sympathetic autonomic reflex arc. In this instance, the synergistic action of 5-FU + LV would have a negative effect on the nerve activity with a reduction of salivary secretion. This would explain the hyposalivation, cited by several authors in patients undergoing the 5-FU+LV scheme in the treatment of colon carcinoma.


Uno de los principales problemas clinicos durante la quimioterapia es la aparicion de graves efectos toxicos sistemicos, incluidos los relacionados con el sistema estomatognatico, que contribuyen a la reduccion de la calidad de vida del paciente. Las complicaciones orales mas frecuentes son la mucositis, disgeusia, inflamacion, sangrado gingival y la disminucion del flujo salival o hiposalivacion, un factor que predispone a la xerostomia, y otras complicaciones locales que alteran la homeostasis del sistema. El objetivo de este estudio fue evaluar la actividad funcional de las glandulas salivales de ratas Wistar sometidas a quimioterapia, a traves de la medicion del flujo salival, los niveles de glucogeno y la respuesta del tejido glandular a agonistas del sistema nervioso autonomo. Se utilizaron cinco grupos experimentales: 1) Control con alimentacion "ad libitum"; 2) 5 - fluorouracilo (20 mg / kg de peso corporal); 3) Leucovorina calcica (10 mg/ kg de peso corporal); 4) 5 - fluorouracilo + leucovorina calcica (20 y 10 mg / kg, respectivamente) por via intraperitoneal durante cinco dias consecutivos, y 5) control con dieta apareada. Grupos 1 y 5 no recibieron drogas. El tratamiento con 5 - fluorouracilo + leucovorina produjo un aumento de flujo salival estimulado y una mayor respuesta a dosis crecientes de agonistas beta en comparacion con otros grupos experimentales. En ambos grupos tratados con citostaticos, se observo bloqueo del consumo de glucogeno al final del periodo. Nuestro trabajo sugiere que la secrecion salival puede estar afectada por un doble mecanismo: el primero seria la toxicidad inducida por 5-FU que causaria depresion del proceso de utilizacion de la glucosa. El segundo mecanismo afectaria el arco reflejo autonomo simpatico. En este caso, la accion sinergica de ambos farmacos de 5-FU + LV repercutiria negativamente sobre la actividad nerviosa con una reduccion de la secrecion salival. Esto explicaria la hiposalivacion citada por varios autores en pacientes sometidos al esquema 5-FU + LV en el tratamiento del carcinoma colorrectal.


Subject(s)
Animals , Male , Rats , Submandibular Gland/drug effects , Submandibular Gland/physiopathology , Leucovorin/pharmacology , Cytostatic Agents/pharmacology , Fluorouracil/pharmacology , Rats, Wistar
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