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Volume 117, Issue 6, Pages 1427-1432 (December 1999)
Decreased food intake and body weight in pancreatic polypeptide-overexpressing mice Naohiko Ueno, Akio Inui, Masako Iwamoto, Toshihiro Kaga, Akihiro Asakawa, Minoru Okita, Mineko Fujimiya, Yoshito Nakajima, Yasukazu Ohmoto, Masaharu Ohnaka, Yutaka Nakaya, Jun-Ichi Miyazaki, Masato Kasuga Gastroenterology Volume 117, Issue 6, Pages (December 1999) DOI: /S (99) Copyright © 1999 American Gastroenterological Association Terms and Conditions
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Fig. 1 Photomicrographs of PP-immunoreactive cells in sections of the pancreas (islets) from (A) control and (B) PP transgenic mice. PP immunoreactivity was dramatically increased in the pancreatic islets of transgenic mice, where PP-positive cells were spread in the middle of the islets. Gastroenterology , DOI: ( /S (99) ) Copyright © 1999 American Gastroenterological Association Terms and Conditions
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Fig. 2 Absence of transgene expression in tissues other than the pancreas assessed by (A–F) immunohistochemistry or (G) Northern blot analysis and RT-PCR. (A) Hypothalamus (control), (B) hypothalamus (tg), (C) liver (tg), (D) small intestine (tg), (E) muscle (M. gastrocnemius, control), and (F) muscle (M. gastrocnemius, tg). The area enclosed by arrowheads in A and B is the paraventricular nucleus of the hypothalamus. Bars = 100 μm. (G) Northern blot analysis and RT-PCR suggested a low amount of expression of the transgene in various tissues such as muscle. Gastroenterology , DOI: ( /S (99) ) Copyright © 1999 American Gastroenterological Association Terms and Conditions
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Fig. 2 Absence of transgene expression in tissues other than the pancreas assessed by (A–F) immunohistochemistry or (G) Northern blot analysis and RT-PCR. (A) Hypothalamus (control), (B) hypothalamus (tg), (C) liver (tg), (D) small intestine (tg), (E) muscle (M. gastrocnemius, control), and (F) muscle (M. gastrocnemius, tg). The area enclosed by arrowheads in A and B is the paraventricular nucleus of the hypothalamus. Bars = 100 μm. (G) Northern blot analysis and RT-PCR suggested a low amount of expression of the transgene in various tissues such as muscle. Gastroenterology , DOI: ( /S (99) ) Copyright © 1999 American Gastroenterological Association Terms and Conditions
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Fig. 3 Growth curve of PP transgenic (●) and control (○) (A) male and (B) female mice on a normal chow diet. Each group contained 7–8 mice. PP transgenic mice gained less weight than control mice, a result that was especially evident in male mice. *P < 0.05; **P < 0.01. Gastroenterology , DOI: ( /S (99) ) Copyright © 1999 American Gastroenterological Association Terms and Conditions
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Fig. 4 Food intake of PP transgenic (■) and control (□) (A) male and (B) female mice on a normal chow diet. Each group contained 15 mice. PP transgenic mice had reduced food intake compared with control littermates, a result that was especially evident in male mice. *P < 0.05; **P < 0.01. Gastroenterology , DOI: ( /S (99) ) Copyright © 1999 American Gastroenterological Association Terms and Conditions
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Fig. 4 Food intake of PP transgenic (■) and control (□) (A) male and (B) female mice on a normal chow diet. Each group contained 15 mice. PP transgenic mice had reduced food intake compared with control littermates, a result that was especially evident in male mice. *P < 0.05; **P < 0.01. Gastroenterology , DOI: ( /S (99) ) Copyright © 1999 American Gastroenterological Association Terms and Conditions
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Fig. 5 Rate of gastric emptying of a solid meal in PP transgenic (■) and control (□) mice. The mice had free access to chow for 1 hour, and gastric emptying was assessed 2, 3, and 4 hours after eating. Each group contained 7–8 male mice. PP transgenic mice had a slower gastric emptying rate than control littermates (*P < 0.05). Gastroenterology , DOI: ( /S (99) ) Copyright © 1999 American Gastroenterological Association Terms and Conditions
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Fig. 6 Food intake and body weight of (A and C) PP transgenic or (B and D) control mice receiving an intraperitoneal injection of 5 μL of anti-PP serum (●) or preimmune serum (○). Each group contained 5 male mice. The immunoneutralization reversed the anorexia and the decrease in body weight of PP transgenic but not control mice (*P < 0.05; **P < 0.01). Gastroenterology , DOI: ( /S (99) ) Copyright © 1999 American Gastroenterological Association Terms and Conditions
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