Ciclos Endocrinos Red
Transcript of Ciclos Endocrinos Red
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Sistema Endocrino
DrMV. Hernando Toledo CáceresUniversidad Nacional de Colombia
MorfofisiologíaUniversidad Cooperativa de Colombia
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Ciclo
melatonina
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Ritmos circadianos
• Reloj Biológico• Núcleo
supraquiasmático• Melatonina• 48 horas• Animales y plantas• Luz• Ciclos hormonales
– Ciclos ovulatorios– Cerebro A.M.– Huesos P.M
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Melatonina
• Glándula pineal• Por fuera de la BH• Antioxidante
– Cerebro, placenta, endometrio, riñón, hígado, intestino, retina, tiroides, timo, adrenal, páncreas, ovarios, células inmunes.
• Después de la pubertad se calcifica
• Insomnio, depresión, vejez• Avena, cereza, maíz,
tomate, papa y arroz
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Retroalimentadores
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Ambientales
Fotoperíodo
Estaciones
Temperatura
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EndógenosStress Edad
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Metabolismo
• Marcapasos endógeno• Mayor producción en la
oscuridad y menor en horas de mayor luz
• Órganos blanco • Neurales: hipocampo,
hipófisis, hipotálamo, retina, glándula pineal y otros)
• No Neurales: gónadas, intestino, vasos sanguíneos, células inmunes
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Funciones
• Ritmos circadianos• Inhibe las gónadas• Causa los ciclos de fertilidad
e infertilidad• Aprendizaje y memoria• Antidepresiva• Controla migrañas• Sistema inmune• Envejecimiento• Reduce el daño de tejidos
por isquemia
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Ciclo
hormonade crecimiento
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Disminuye14% cadaDécadadesdeLos 30
Somatotropa
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GHIH – GHRHSomatostatina - Somatocrinina
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Retroalimentadores
positivosGH
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Sueño REM
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Ejercicio
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Glucocorticoides
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Estradiol y progesterona
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Stress
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Hipoglicemia
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Melatonina
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Retroalimentadores
negativos
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Edad
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GH
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Morfina
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GH
Órgano Blanco: Todas las células del cuerpo
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Estimula los Factores de Crecimiento
• Ovárico• Nervioso• Mamario• Eritropoyético• Tromboblástico• Glial• Plaquetario• Epidérmico• Hepático
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Factores deCrecimiento
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Funciones GH
• Estimula mitosis• Aumenta
metabolismo de grasas
• Hipertrofia de células cardíacas
• Convierte Tiroxina en T3
• Estimula RNA o sea síntesis de proteínas
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Funciones GH
• Estimula células pancreáticas
• Aumenta síntesis de glucosa
• Aumenta masas musculares
• Aumenta la longitud y grosor óseo
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Ciclo
adhvasopresina
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Natremia
ARGININA
LISINAPorcinos
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Diúresis
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Orina concentrada
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Retroalimentadores
positivos
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Hemorragias
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Stress quirúrgico
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Anestésicos
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Presión osmótica alta
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LEC Bajo
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Retroalimentadores
negativos
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LEC alto
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Alcohol
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Diabetes insipida
Poliuria
Polidipsia
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Ciclo
Oxitocina
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Producción
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Células Mioepiteliales
Eyección
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Musculatura lisa
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Retroalimentadores
positivos
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Reflejo táctil
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Estimulación tactil
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Succión
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Estimulación genital
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Estimulación emocional
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Amor maternal - paternal
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Descenso fetal
Reflejo de Ferguson
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Pensamientos positivos
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Confianza
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Retroalimentadores
negativos
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Alcohol
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Ciclo
sexual
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Generalidades de GnRH
• Pulsaciones• Luz :
Fotoperíodo• Estaciones
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Retroalimentadores + de GnRH
• Feromonas• Bulbo olfatorio• Retina• Sonidos• Noradrenalina• Alimentación• Temperatura• Estradiol• Melatonina
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Retroalimentadores - de GnRH
• Dopamina• Opioides• Stress• Corticoides• Inhibina
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Hembras
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Estímulos medioambientales
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Ovogénesis
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Crecimiento folicular
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PGF2&
Interferón Thau
GnRH
FSH
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Ovulación inducida
Conejas
Ardillas
Ratas
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Óvulos
Feto: 7.000.000
Nacer: 1.000.000
Menarquia: 300.000
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Machos
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Ciclo
cortisol
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Primera
Hormona
descubierta
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LPH
EndorfinasCiclo
Circadiano
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Retroalimentadores
positivos
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• Oxitocina• ADH• Traumatismo• Infección• Calor o frío
intenso• Cirugía• Restricción del
movimiento• Stress• Ritmo
circadiano
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Funciones ACTH
• Estimula Cortisol• Secreción de
esteroides• Síntesis de proteínas• Lipólisis• Libera insulina• Estimula GH• Acelera transporte de
glucosa en músculo
6 a 9 A.M
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Funciones Cortisol
• Inotropismo• Regulación de
interleucinas• Suprime
Prostaglandinas• Estimula el
catabolismo
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Ciclo
lactógeno
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PIF PRF
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Retroalimentadores
positivos
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Lactancia
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Succión
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Stress
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Hormonas
Progesterona
Insulina
Tiroxina
Cortisol
TRH
VIP
Oxitocina
Sustancia P
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Tranquilizantes
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Retroalimentadores
negativos
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Stress
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GABA
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Estrógenos
![Page 114: Ciclos Endocrinos Red](https://reader033.fdocuments.net/reader033/viewer/2022052523/5571f2b649795947648cee72/html5/thumbnails/114.jpg)
Funciones
• Mantener la lactancia• Crecimiento fetal• Equilibrio Electrolítico• Próstata, vesículas
seminales y testículos• Estimula formación
de receptores de membrana del ovario para FSH y LH
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Ciclo
tiroideo
![Page 116: Ciclos Endocrinos Red](https://reader033.fdocuments.net/reader033/viewer/2022052523/5571f2b649795947648cee72/html5/thumbnails/116.jpg)
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YODO
Tirosina
Tiroglobulina
T3
T4T3
T3T4
T4
T4
T3
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Retroalimentadores
positivos
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Noche
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Frío Crónico
![Page 122: Ciclos Endocrinos Red](https://reader033.fdocuments.net/reader033/viewer/2022052523/5571f2b649795947648cee72/html5/thumbnails/122.jpg)
Retroalimentadores
negativos
![Page 123: Ciclos Endocrinos Red](https://reader033.fdocuments.net/reader033/viewer/2022052523/5571f2b649795947648cee72/html5/thumbnails/123.jpg)
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Stress – Calor
![Page 125: Ciclos Endocrinos Red](https://reader033.fdocuments.net/reader033/viewer/2022052523/5571f2b649795947648cee72/html5/thumbnails/125.jpg)
TRH
TSH
Desarrollo de tiroides
Aumento de tirosina (aa)
Proteólisis de tiroglobina
T3 triyodotironina
(Tiroxina)
T4 tetrayodotironina
![Page 126: Ciclos Endocrinos Red](https://reader033.fdocuments.net/reader033/viewer/2022052523/5571f2b649795947648cee72/html5/thumbnails/126.jpg)
Funciones Yodotironinas
• Efecto calorigeno VD• Metabolismo
– Proteínas– Carbohidratos– Lípidos
• Maduración del SNC• Fuerza cardiaca• Motilidad intestinal• Crecimiento• Muscular y óseo
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Ciclo
Pancreático
![Page 129: Ciclos Endocrinos Red](https://reader033.fdocuments.net/reader033/viewer/2022052523/5571f2b649795947648cee72/html5/thumbnails/129.jpg)
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