Development and characterization of an inducible mouse model for glycogen storage disease type Ib

Federica Raggi, Anna Livia Pissavino, Roberta Resaz, Daniela Segalerba, Andrea Puglisi, Cristina Vanni, Francesca Antonini, Genny Del Zotto, Alessandra Gamberucci, Paola Marcolongo, Maria Carla Bosco, Federica Grillo, Luca Mastracci, Alessandra Eva

Research output: Contribution to journalArticle

Abstract

BACKGROUND AND AIMS: Glycogen storage disease type Ib (GSD1b) is a rare metabolic and immune disorder caused by a deficiency in the glucose-6-phosphate transporter (G6PT) and characterized by impaired glucose homeostasis, myeloid dysfunction, and long-term risk of hepatocellular adenomas. Despite maximal therapy, based on a strict diet and on granulocyte colony-stimulating factor treatment, long-term severe complications still develop. Understanding the pathophysiology of GSD1b is a prerequisite to develop new therapeutic strategies and depends on the availability of animal models. The G6PT-KO mouse mimics the human disease but is very fragile and rarely survives weaning. We generated a conditional G6PT-deficient mouse as an alternative model for studying the long-term pathophysiology of the disease. We utilized this conditional mouse to develop an inducible G6PT-KO model to allow temporally regulated G6PT deletion by the administration of tamoxifen (TM).

METHODS: We generated a conditional G6PT-deficient mouse utilizing the CRElox strategy. Histology, histochemistry, and phenotype analyses were performed at different times after TM-induced G6PT inactivation. Neutrophils and monocytes were isolated and analyzed for functional activity with standard techniques.

RESULTS: The G6PT-inducible KO mice display the expected disturbances of G6P metabolism and myeloid dysfunctions of the human disorder, even though with a milder intensity.

CONCLUSIONS: TM-induced inactivation of G6PT in these mice leads to a phenotype which mimics that of human GSD1b patients. The conditional mice we have generated represent an excellent tool to study the tissue-specific role of the G6PT gene and the mechanism of long-term complications in GSD1b.

Original languageEnglish
Pages (from-to)1015-1025
Number of pages11
JournalJournal of Inherited Metabolic Disease
Volume41
Issue number6
DOIs
Publication statusPublished - Nov 2018

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Glycogen Storage Disease
Tamoxifen
glucose 6-phosphate(transporter)
Liver Cell Adenoma
Phenotype
Immune System Diseases
Granulocyte Colony-Stimulating Factor
Weaning
Monocytes
Histology
Neutrophils
Homeostasis
Therapeutics
Animal Models
Diet

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Development and characterization of an inducible mouse model for glycogen storage disease type Ib. / Raggi, Federica; Pissavino, Anna Livia; Resaz, Roberta; Segalerba, Daniela; Puglisi, Andrea; Vanni, Cristina; Antonini, Francesca; Del Zotto, Genny; Gamberucci, Alessandra; Marcolongo, Paola; Bosco, Maria Carla; Grillo, Federica; Mastracci, Luca; Eva, Alessandra.

In: Journal of Inherited Metabolic Disease, Vol. 41, No. 6, 11.2018, p. 1015-1025.

Research output: Contribution to journalArticle

Raggi, Federica ; Pissavino, Anna Livia ; Resaz, Roberta ; Segalerba, Daniela ; Puglisi, Andrea ; Vanni, Cristina ; Antonini, Francesca ; Del Zotto, Genny ; Gamberucci, Alessandra ; Marcolongo, Paola ; Bosco, Maria Carla ; Grillo, Federica ; Mastracci, Luca ; Eva, Alessandra. / Development and characterization of an inducible mouse model for glycogen storage disease type Ib. In: Journal of Inherited Metabolic Disease. 2018 ; Vol. 41, No. 6. pp. 1015-1025.
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abstract = "BACKGROUND AND AIMS: Glycogen storage disease type Ib (GSD1b) is a rare metabolic and immune disorder caused by a deficiency in the glucose-6-phosphate transporter (G6PT) and characterized by impaired glucose homeostasis, myeloid dysfunction, and long-term risk of hepatocellular adenomas. Despite maximal therapy, based on a strict diet and on granulocyte colony-stimulating factor treatment, long-term severe complications still develop. Understanding the pathophysiology of GSD1b is a prerequisite to develop new therapeutic strategies and depends on the availability of animal models. The G6PT-KO mouse mimics the human disease but is very fragile and rarely survives weaning. We generated a conditional G6PT-deficient mouse as an alternative model for studying the long-term pathophysiology of the disease. We utilized this conditional mouse to develop an inducible G6PT-KO model to allow temporally regulated G6PT deletion by the administration of tamoxifen (TM).METHODS: We generated a conditional G6PT-deficient mouse utilizing the CRElox strategy. Histology, histochemistry, and phenotype analyses were performed at different times after TM-induced G6PT inactivation. Neutrophils and monocytes were isolated and analyzed for functional activity with standard techniques.RESULTS: The G6PT-inducible KO mice display the expected disturbances of G6P metabolism and myeloid dysfunctions of the human disorder, even though with a milder intensity.CONCLUSIONS: TM-induced inactivation of G6PT in these mice leads to a phenotype which mimics that of human GSD1b patients. The conditional mice we have generated represent an excellent tool to study the tissue-specific role of the G6PT gene and the mechanism of long-term complications in GSD1b.",
author = "Federica Raggi and Pissavino, {Anna Livia} and Roberta Resaz and Daniela Segalerba and Andrea Puglisi and Cristina Vanni and Francesca Antonini and {Del Zotto}, Genny and Alessandra Gamberucci and Paola Marcolongo and Bosco, {Maria Carla} and Federica Grillo and Luca Mastracci and Alessandra Eva",
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T1 - Development and characterization of an inducible mouse model for glycogen storage disease type Ib

AU - Raggi, Federica

AU - Pissavino, Anna Livia

AU - Resaz, Roberta

AU - Segalerba, Daniela

AU - Puglisi, Andrea

AU - Vanni, Cristina

AU - Antonini, Francesca

AU - Del Zotto, Genny

AU - Gamberucci, Alessandra

AU - Marcolongo, Paola

AU - Bosco, Maria Carla

AU - Grillo, Federica

AU - Mastracci, Luca

AU - Eva, Alessandra

PY - 2018/11

Y1 - 2018/11

N2 - BACKGROUND AND AIMS: Glycogen storage disease type Ib (GSD1b) is a rare metabolic and immune disorder caused by a deficiency in the glucose-6-phosphate transporter (G6PT) and characterized by impaired glucose homeostasis, myeloid dysfunction, and long-term risk of hepatocellular adenomas. Despite maximal therapy, based on a strict diet and on granulocyte colony-stimulating factor treatment, long-term severe complications still develop. Understanding the pathophysiology of GSD1b is a prerequisite to develop new therapeutic strategies and depends on the availability of animal models. The G6PT-KO mouse mimics the human disease but is very fragile and rarely survives weaning. We generated a conditional G6PT-deficient mouse as an alternative model for studying the long-term pathophysiology of the disease. We utilized this conditional mouse to develop an inducible G6PT-KO model to allow temporally regulated G6PT deletion by the administration of tamoxifen (TM).METHODS: We generated a conditional G6PT-deficient mouse utilizing the CRElox strategy. Histology, histochemistry, and phenotype analyses were performed at different times after TM-induced G6PT inactivation. Neutrophils and monocytes were isolated and analyzed for functional activity with standard techniques.RESULTS: The G6PT-inducible KO mice display the expected disturbances of G6P metabolism and myeloid dysfunctions of the human disorder, even though with a milder intensity.CONCLUSIONS: TM-induced inactivation of G6PT in these mice leads to a phenotype which mimics that of human GSD1b patients. The conditional mice we have generated represent an excellent tool to study the tissue-specific role of the G6PT gene and the mechanism of long-term complications in GSD1b.

AB - BACKGROUND AND AIMS: Glycogen storage disease type Ib (GSD1b) is a rare metabolic and immune disorder caused by a deficiency in the glucose-6-phosphate transporter (G6PT) and characterized by impaired glucose homeostasis, myeloid dysfunction, and long-term risk of hepatocellular adenomas. Despite maximal therapy, based on a strict diet and on granulocyte colony-stimulating factor treatment, long-term severe complications still develop. Understanding the pathophysiology of GSD1b is a prerequisite to develop new therapeutic strategies and depends on the availability of animal models. The G6PT-KO mouse mimics the human disease but is very fragile and rarely survives weaning. We generated a conditional G6PT-deficient mouse as an alternative model for studying the long-term pathophysiology of the disease. We utilized this conditional mouse to develop an inducible G6PT-KO model to allow temporally regulated G6PT deletion by the administration of tamoxifen (TM).METHODS: We generated a conditional G6PT-deficient mouse utilizing the CRElox strategy. Histology, histochemistry, and phenotype analyses were performed at different times after TM-induced G6PT inactivation. Neutrophils and monocytes were isolated and analyzed for functional activity with standard techniques.RESULTS: The G6PT-inducible KO mice display the expected disturbances of G6P metabolism and myeloid dysfunctions of the human disorder, even though with a milder intensity.CONCLUSIONS: TM-induced inactivation of G6PT in these mice leads to a phenotype which mimics that of human GSD1b patients. The conditional mice we have generated represent an excellent tool to study the tissue-specific role of the G6PT gene and the mechanism of long-term complications in GSD1b.

U2 - 10.1007/s10545-018-0211-2

DO - 10.1007/s10545-018-0211-2

M3 - Article

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VL - 41

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EP - 1025

JO - Journal of Inherited Metabolic Disease

JF - Journal of Inherited Metabolic Disease

SN - 0141-8955

IS - 6

ER -