Effect of aging on gastric mucosal defense mechanisms: ROS, apoptosis, angiogenesis, and sensory neurons

被引：46
作者：
Kang, Jung Mook [1 ,2 ]
Kim, Nayoung [1 ,2 ,3 ]
Kim, Joo-Hyon [4 ]
Oh, Euichaul [4 ]
Lee, Bong-Yong [4 ]
Lee, Byoung Hwan [3 ]
Shin, Cheol Min [3 ]
Park, Ji Hyun [1 ,2 ]
Lee, Mi Kyoung [1 ,2 ]
Nam, Ryoung Hee [3 ]
Lee, Hee Eun [5 ]
Lee, Hye Seung [5 ]
Kim, Joo Sung [1 ,2 ]
Jung, Hyun Chae [1 ,2 ]
Song, In Sung [1 ,2 ]
机构：
[1] Seoul Natl Univ, Coll Med, Dept Internal Med, Seoul 151, South Korea
[2] Seoul Natl Univ, Coll Med, Liver Res Inst, Seoul, South Korea
[3] Seoul Natl Univ, Bundang Hosp, Dept Internal Med, Songnam, Gyeonggi, South Korea
[4] SK Chem, Life Sci R&D Ctr, Suwon, Gyeonggi, South Korea
[5] Seoul Natl Univ, Bundang Hosp, Dept Pathol, Songnam, Gyeonggi, South Korea
来源：
AMERICAN JOURNAL OF PHYSIOLOGY-GASTROINTESTINAL AND LIVER PHYSIOLOGY | 2010年 / 299卷 / 05期
关键词：
Egr-1; PTEN; caspase-3; glycosaminoglycan; aging gastropathy; CGRP; lipid hydroperoxide; reactive oxygen species; ENDOTHELIAL GROWTH-FACTOR; SENESCENCE-ACCELERATED MICE; LIPID HYDROPEROXIDE LEVEL; EARLY REPARATIVE PHASE; HELICOBACTER-PYLORI; CALORIE RESTRICTION; OXIDATIVE STRESS; EPITHELIAL-CELLS; MESSENGER-RNA; UP-REGULATION;
D O I：
10.1152/ajpgi.00218.2010
中图分类号：
R57 [消化系及腹部疾病];
学科分类号：
摘要：
Kang JM, Kim N, Kim J, Oh E, Lee B, Lee BH, Shin CM, Park JH, Lee MK, Nam RH, Lee HE, Lee HS, Kim JS, Jung HC, Song IS. Effect of aging on gastric mucosal defense mechanisms: ROS, apoptosis, angiogenesis, and sensory neurons. Am J Physiol Gastrointest Liver Physiol 299: G1147-G1153, 2010. First published August 19, 2010; doi: 10.1152/ajpgi.00218.2010.-Aging changes in the stomach lead to a decreased capacity for tissue repair in response to gastric acid. The aim of this study was to determine the mechanism associated with the increased susceptibility to injury of aging mucosa including reactive oxygen species (5), apoptosis, angiogenesis, and sensory neuron activity. Fischer 344 rats at four different ages (6, 31, 74 wk, and 2 yr of age) were studied. The connective tissue indicators [salt-soluble collagen and sulfated glycosaminoglycan (sGAG)], lipid hydroperoxide (LPO), myeloperoxidase (MPO), and hexosamine were assessed. We also evaluated the expression of early growth response-1 (Egr-1), phosphatase and tension homologue deleted on chromosome 10 (PTEN), caspase-9 (index of apoptosis), VEGF (index of angiogenesis), calcitonin gene-related peptide (CGRP, index of sensory neurons), and neuronal nitric oxide synthase (nNOS). The histological connective tissue area in the lower part of rat gastric mucosa increased with aging, with increase of salt-soluble collagen and sGAG. LPO and MPO in old rats were significantly greater than in the young rats, whereas hexosamine was significantly reduced. The old gastric mucosa had increased expression of Egr-1, PTEN, and caspase-9, whereas the VEGF, CGRP, and nNOS expression were significantly reduced. These results indicate that the lower part of rat gastric mucosa was found to be replaced by connective tissue with accumulation of oxidative products with aging. In addition, impairment of apoptosis, angiogenesis, and sensory neuron activity via the activation of Egr-1 and PTEN might increase the susceptibility of gastric mucosa to injury during aging.
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收藏
页码：G1147 / G1153
页数：7
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