ES2610622T3 - Regulación de microARN miR-33 en el tratamiento de trastornos relacionados con colesterol - Google Patents

Regulación de microARN miR-33 en el tratamiento de trastornos relacionados con colesterol Download PDF

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ES2610622T3
ES2610622T3 ES10764855.2T ES10764855T ES2610622T3 ES 2610622 T3 ES2610622 T3 ES 2610622T3 ES 10764855 T ES10764855 T ES 10764855T ES 2610622 T3 ES2610622 T3 ES 2610622T3
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cholesterol
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microrna
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Anders M. Naar
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    • C12N15/113Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing
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    • AHUMAN NECESSITIES
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    • A61P3/08Drugs for disorders of the metabolism for glucose homeostasis
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    • C12N2310/3231Chemical structure of the sugar modified ring structure having an additional ring, e.g. LNA, ENA

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Abstract

Un ácido nucleico que es complementario de las SEQ ID NO. 1 o 2, para uso en el tratamiento terapéutico de un sujeto que necesite homeostasis de colesterol reduciendo la cantidad de colesterol en circulación en la sangre del sujeto; o aumentando la salida de colesterol intracelular y/o la producción de HDL en el hígado del sujeto.

Description

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análisis por FPLC de suero agrupado como se ha descrito (Hyogo H, et al. (2002) J. Biol. Chem. 277: 34117). Las concentraciones de colesterol HDL en plasma aumentaron significativamente en animales tratados con LNAantisentido de miR33a en comparación con ratones tratados con controlLNA (Fig. 10A, B y Tabla 2). Por el contrario, no hubo ningún efecto significativo en las concentraciones en plasma de colesterol LDL, triglicéridos o niveles de
5 glucosa (Fig. 10BD y Tabla 2). En estos experimentos, tampoco hubo ninguna hepatotoxicidad aparente (AST/ALT en plasma) (Fig. 10E, F y Tabla 2). La elevación observada en HDL en plasma colesterol en respuesta a tratamiento con antisentido de LNAmiR33a es coherente con la regulación de la salida de colesterol dependiente de ABCA1 por miR33a in vivo.
10 Estos resultados confirman adicionalmente que la familia de SREBP de mamífero de factores de transcripción, reguladores clave de genes colesterogénicos y lipogénicos, son hospedadores para miARN conservados (miR33a/b) que actúan en concierto con los productos génicos de hospedador de SREBP para gobernar los niveles de colesterol intracelular y homeostasis de colesterol en vertebrados. La Fig. 10G representa un modelo para regulación coordinada de homeostasis de colesterol por miR33 y su producto génico hospedador SREBP. miR33 reprime la traducción de
15 ABCA1 dirigiéndose a su 3’ UTR. Esta etapa está coordinada con la expresión de SREBP, que activa la biosíntesis de colesterol y captación mediante transactivación de genes colesterogénicos. La acumulación de colesterol inhibe la ruta de SREBP, y activa la expresión de ABCA1, que se trasloca a la membrana celular y media en la salida de colesterol a apoAI y HDL.
20 Tabla 2
n
Tratamiento Colesterol [mg/dl] triglicéridos [mg/dl] Glucosa [mg/dl] ALT [UI/l] AST [UI/l]
antes
después antes después antes después antes después antes después
1
PBS 163,5 167 211 211 159 318 17 68 58 101
2
PBS 239,5 209 372 195 193 333 16 33 39 27
3
PBS 190,5 220 141 256 226 329 37 10 35 135
4
PBS 230 222 257 171 186 378 14 25 44 289
5
PBS 189,5 205 263 161 201 282 52 14 39 135
1
LNA 243 325 249 236 214 26 17 60 67
2
LNA 188 204 329 193 216 421 46 61 37 209
3
LNA 234,5 264 278 283 264 264 44 23 68 44
4
LNA 239 247 486 204 218 391 35 35 63 33
5
LNA 215,5 280 289 133 158 230 28 33 153 229
1
LC 206 157 308 224 275 72 26 128 142
2
LC 214,5 224 243 241 390 365 21 22 30 71
3
LC 180 223 384 134 160 233 18 22 54 150
4
LC 201 206 197 167 233 416 26 15 67 46
5
LC 210 186 238 373 286 299 47 17 68 52
Tabla 2. Tratamiento de ratones con una dieta de tipo occidental con ácido nucleico bloqueado (LNA)antímero de miR33a. Se midieron colesterol en suero total (A), triglicéridos en plasma (B), glucosa (C), AST (D) y ALT (E) en ratones alimentados con una dieta de tipo occidental antes y después de la inyección con PBS (vehículo),
25 oligonucleótidos antisentidoLNA dirigidos contra miR33a de ratón y oligonucleótidos de control de LNA mezclados (LC).
Como se representa en estos ejemplos, miembros de la familia de SREBP de mamífero de factores de transcripción, reguladores clave de genes colesterogénicos y lipogénicos, son hospedadores de miARN conservados (miR33a/b)
30 que actúan en concierto con los productos génicos hospedadores de SREBP para gobernar los niveles de colesterol intracelular y homeostasis de colesterol en vertebrados. miR33 ejerce control postranscripcional del transportador de colesterol ABCA1, con importantes consecuencias para el tráfico de colesterol in vitro y síntesis de HDL in vivo.
16
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Claims (1)

  1. imagen1
ES10764855.2T 2009-03-31 2010-03-31 Regulación de microARN miR-33 en el tratamiento de trastornos relacionados con colesterol Active ES2610622T3 (es)

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PCT/US2010/029376 WO2010120508A2 (en) 2009-03-31 2010-03-31 Regulation of mir-33 micrornas in the treatment of cholesterol-related disorders

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EP2414521A4 (en) 2013-02-13
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WO2010120508A3 (en) 2011-03-17
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