Clin Nutr Res.  2017 Apr;6(2):130-135. 10.7762/cnr.2017.6.2.130.

Nicotinamide Reduces Amyloid Precursor Protein and Presenilin 1 in Brain Tissues of Amyloid Beta-Tail Vein Injected Mice

Affiliations
  • 1Department of Food and Nutrition, Chonnam National University, Gwangju 61186, Korea.
  • 2Department of Food and Nutrition, Seoul Women's University, Seoul 01797, Korea. sjyang89@swu.ac.kr

Abstract

The purpose of this study is to investigate whether nicotinic acid (NA) and nicotinamide (NAM) reduce the Alzheimer disease (AD)-related gene expression in brain tissues of amyloid beta (Aβ)-injected mice. Male Crj:CD1 (ICR) mice were divided into 6 treatment groups; 1) control, 2) Aβ control, 3) Aβ + NA 20 mg/kg/day (NA20), 4) Aβ + NA40, 5) Aβ + NAM 200 mg/kg/day (NAM200), and 6) Aβ + NAM400. After 1-week acclimation period, the mice orally received NA or NAM once a day for a total of 7 successive days. On day 7, biotinylated Aβ42 was injected into mouse tail vein. At 5 hours after the injection, blood and tissues were collected. Aβ42 injection was confirmed by Western blot analysis of Aβ42 protein in brain tissue. NAM400 pre-treatment significantly reduced the gene expression of amyloid precursor protein and presenilin 1 in brain tissues. And, NAM200 and NAM400 pre-treatments significantly increased sirtuin 1 expression in brain tissues, which is accompanied by the decreased brain expression of nuclear factor kappa B by 2 doses of NAM. Increased expression of AD-related genes was attenuated by the NAM treatment, which suggests that NAM supplementation may be a potential preventive strategy against AD-related deleterious changes.

Keyword

Aging; Alzheimer disease; β-amyloid; Niacin

MeSH Terms

Acclimatization
Aging
Alzheimer Disease
Amyloid*
Animals
Blotting, Western
Brain*
Gene Expression
Humans
Male
Mice*
NF-kappa B
Niacin
Niacinamide*
Presenilin-1*
Presenilins*
Sirtuin 1
Tail
Veins*
Amyloid
NF-kappa B
Niacin
Niacinamide
Presenilin-1
Presenilins
Sirtuin 1

Figure

  • Figure 1 Aβ tail vein injection increases brain Aβ levels. Brain tissues were collected and analyzed via western blot using anti-Aβ antibody. Aβ levels were quantified and data are expressed as mean ± SEM. Aβ, amyloid beta; SEM, standard error of the mean; CON, control. *p < 0.05 compared with CON.

  • Figure 2 NAM reduces 2 AD-related targets (A) APP and (B) PS1, and inflammation-related targets (C) Sirt1 and NF-κB in brain tissues of Aβ tail vein-injected mice. Data are expressed as mean ± SEM. Different letters within a variable are significantly different at p < 0.05. NAM, nicotinamide; AD, Alzheimer disease; APP, amyloid precursor protein; PS1, presenilin 1; Sirt1, sirtuin 1; NF-κB, nuclear factor kappa B; SEM, standard error of the mean; CON, control; NA, nicotinic acid.


Cited by  1 articles

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Hee Jae Lee, Hye In Seo, Hee Yun Cha, Yun Jung Yang, Soo Hyun Kwon, Soo Jin Yang
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