SLOWED SYNTHESIS OF DNA AND METHIONINE IS A PATHOGENETIC MECHANISM COMMON TO DEMENTIA IN DOWNS-SYNDROME, AIDS AND ALZHEIMERS-DISEASE

被引:33
作者
REGLAND, B [1 ]
GOTTFRIES, CG [1 ]
机构
[1] GOTHENBURG UNIV, ST JORGENS HOSP, DEPT PSYCHIAT, S-41124 GOTHENBURG, SWEDEN
关键词
D O I
10.1016/0306-9877(92)90153-4
中图分类号
R-3 [医学研究方法]; R3 [基础医学];
学科分类号
1001 ;
摘要
This is aa presentation of the hypothesis of aa pathogenetic mechanism common to the dementia seen in Alzheimer's disease (AD), Down's Syndrome (DS) and the acquired immunodeficiency syndrome (AIDS). As there is experimental evidence of defective DNA repair capacity in AD and DS, unrepaired damage to DNA occurs in these diseases and may lead to complete breakdown of cellular function and ultimate cell death. Cobalamin and folate are coordinated in aa vulnerable key position in the synthesis of DNA and S-adenosylmethionine (SAM). Cobalamin/folate deficiency, aa significant feature in senile dementia of Alzheimer type and in AIDS-related dementia complex, will result in concomitant slowed synthesis of DNA and SAM. The enzyme cystathionine-beta-synthetase (CBS) has been localized to the chromosome band 21q22.3. Owing to gene dosage, CBS activity is increased in trisomy 21. As aa consequence, cobalamin/folate metabolism is inhibited, which leads to slowing of DNA and SAM synthesis in DS patients. Amyloidosis is aa hallmark of AD and DS brain neuropathology and recent experimental findings support the view that amyloid or amyloid precursors stimulate DNA synthesis, which is in agreement with the hypothesis presented in this paper. In summary, demented patients with cobalamin/folate deficiency, trisomy 21 and human immunodeficiency virus (HIV) infection display aa simultaneous downregulation of DNA and SAM synthesis, which may indicate aa pathway common to the dementia seen in AD, DS and AIDS.
引用
收藏
页码:11 / 19
页数:9
相关论文
共 103 条
  • [1] INCREASED ACTIVITY OF BRAIN AND PLATELET MONOAMINE-OXIDASE IN DEMENTIA OF ALZHEIMER TYPE
    ADOLFSSON, R
    GOTTFRIES, CG
    ORELAND, L
    WIBERG, A
    WINBLAD, B
    [J]. LIFE SCIENCES, 1980, 27 (12) : 1029 - 1034
  • [2] ULTRASTRUCTURAL-STUDY OF SUB-ACUTE COMBINED DEGENERATION OF SPINAL-CORD IN VITAMIN-B12-DEFICIENT RHESUS-MONKEYS
    AGAMANOLIS, DP
    VICTOR, M
    HARRIS, JW
    HINES, JD
    CHESTER, EM
    KARK, JA
    [J]. JOURNAL OF NEUROPATHOLOGY AND EXPERIMENTAL NEUROLOGY, 1978, 37 (03) : 273 - 299
  • [3] ALEXOPOULOS GS, 1984, AM J PSYCHIAT, V141, P97
  • [4] DECREASED REPAIR OF X-RAY-INDUCED DNA SINGLE-STRAND BREAKS IN LYMPHOCYTES IN DOWNS-SYNDROME
    ATHANASIOU, K
    SIDERIS, EG
    BARTSOCAS, C
    [J]. PEDIATRIC RESEARCH, 1980, 14 (04) : 336 - 338
  • [5] BABIOR BM, 1984, HEMATOLOGY PATHOPHYS, P73
  • [6] NEUROFIBRILLARY TANGLES, GRANULOVACUOLAR DEGENERATION, AND NEURON LOSS IN DOWN SYNDROME - QUANTITATIVE COMPARISON WITH ALZHEIMER DEMENTIA
    BALL, MJ
    NUTTALL, K
    [J]. ANNALS OF NEUROLOGY, 1980, 7 (05) : 462 - 465
  • [7] THE CHOLINERGIC HYPOTHESIS OF GERIATRIC MEMORY DYSFUNCTION
    BARTUS, RT
    DEAN, RL
    BEER, B
    LIPPA, AS
    [J]. SCIENCE, 1982, 217 (4558) : 408 - 417
  • [8] BLUSZTAJN JK, 1986, PSYCHOPHARMACOL BULL, V22, P781
  • [9] Boss G R, 1986, Adv Exp Med Biol, V195 Pt B, P639
  • [10] Bradley W G, 1989, Prog Clin Biol Res, V317, P715