Korean Journal of Psychosomatic Medicine (정신신체의학)

Korean Psychosomatic Society (한국정신신체의학회)
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Association between Thyroid-Related Hormones and Cognitive Function in Patients with Alzheimer's Disease and Mild Cognitive Impairment

알츠하이머병 및 경도인지장애 환자에서 갑상선 관련 호르몬과 인지기능과의 상관관계

  • Park, Da Yun (Department of Psychiatry, Ilsan Paik Hospital, Inje University College of Medicine) ;
  • Kim, Hyun (Department of Psychiatry, Ilsan Paik Hospital, Inje University College of Medicine) ;
  • Lee, Kang Joon (Department of Psychiatry, Ilsan Paik Hospital, Inje University College of Medicine)
  • 박다윤 (인제대학교 의과대학 일산백병원 정신건강의학교실) ;
  • 김현 (인제대학교 의과대학 일산백병원 정신건강의학교실) ;
  • 이강준 (인제대학교 의과대학 일산백병원 정신건강의학교실)
  • Received : 2019.04.09
  • Accepted : 2019.06.09
  • Published : 2019.06.30
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Abstract

Objectives : The association between thyroid-related hormones and cognitive function has been controversial. The purpose of this study is to compare the levels of thyroid-related hormones in patients with Alzheimer's disease (AD) and mild cognitive impairment (MCI). Furthermore, we investigated the relationship between thyroid-related hormones and cognitive function. Methods : From January 2011 to December 2018, we retrospectively reviewed 105 patients who were diagnosed with AD and MCI by visiting a dementia clinic at Ilsan Paik Hospital. Thyroid-related hormones [triiodothyronine (T3), thyroxine (T4), and thyroid stimulating hormone (TSH)] was measured using chemiluminescent immunoassay. An independent sample t-test was performed to analyze the mean value of thyroid-related hormones in patients of AD and MCI. To investigate whether thyroid-related hormones correlate significantly with Global deterioration scale (GDS), Clinical dementia rating (CDR) and scores of each The Korean version of the consortium to establish a registry for Alzheimer's disease items, we conducted a partial correlation analysis with geriatric depression scale-Korean version (GDS-K) scores as covariates. Results : There was no significant difference in the mean serum T3, T4 and TSH levels between patients of the AD and the MCI, but the Construction Praxis Test (CPT) showed a significant positive correlation with the serum TSH concentration (p-value=0.004). Conclusions : In our study, the positive correlation between serum TSH level and the CPT associated with executive function was found to be helpful in understanding the association between thyroid-related hormones and the pathophysiology of dementia. Prospective studies in regard of the pathophysiology of thyroid-related hormones on cognitive function will be necessary in the future.

연구목적 갑상선관련 호르몬과 인지기능의 상관 유무는 논란이 되고 있다. 알츠하이머병과 경도인지장애 환자에서 갑상선관련 호르몬 농도에 차이가 있는지 비교해 보고, 나아가 갑상선관련 호르몬 농도가 인지기능의 어떠한 영역과 관련이 있는지에 대해 연구해보고자 하였다. 방 법 2011년 1월부터 2018년 12월까지 기억력 저하를 주소로 일산백병원 정신건강의학과 치매클리닉을 방문하여 알츠하이머병(NINCDS-ADRDA 진단기준)과 경도인지장애(Petersen 진단기준) 으로 진단된 105명의 환자를 대상으로 한 후향적 연구이다. 갑상선관련 호르몬[삼요오드티로닌(Triiodothyronine, T3), 티록신(Thyroxine, T4), 갑상선 자극 호르몬(Thyroid stimulating hormone, TSH)]의 측정은 화학발광면역측정법을 사용하여 검사하였다. 알츠하이머병군과 경도인지장애군 간의 갑상선관련 호르몬의 평균치 분석을 위하여 독립표본 t-검정을 시행하였다. 갑상선관련 호르몬이 전반적 퇴화 척도(Global deterioration scale, GDS), 치매임상평가척도(Clinical dementia rating, CDR) 및 한국형 임상치매평가척도(The Korean version of the consortium to establish a registry for Alzheimer's disease, CERAD-K)의 각 항목 별 점수들과 유의한 상관이 있는지 알아보기 위하여 한국판 노인우울척도(Geriatric depression scale-Korean version, GDS-K)를 통제변수로하여 편상관분석을 시행하였다. 결 과 총 105명의 환자 중 알츠하이머병군은 74명, 경도인지장애군은 31명이었다. 알츠하이머병군과 경도인지장애군 간 혈청 T3, T4, TSH 농도의 평균은 모두 유의한 차이가 없었으나, CERAD-K 항목 중 구성행동 검사(Construction praxis test, CPT)가 혈청 TSH 농도와 유의한 양의 상관 관계를 보였다(p-value=0.004). 결 론 본 연구에서 실행기능과 연관된 CPT가 혈청 TSH 농도와 유의한 양의 상관 관계를 보인 것은 갑상선관련 호르몬과 치매의 병태생리와의 연관성에 대한 이해에 도움을 줄 수 있다고 생각한다. 향후 갑상선관련 호르몬이 인지기능에 미치는 병태생리 기전에 관한 전향적 연구들이 필요할 것으로 사료된다.

Keywords

Table 1. Clinical characteristics in Alzheimer’s disease and mild cognitive impairment group

JSSCBG_2019_v27n1_60_t0001.png 이미지

Table 2. CERAD-K scores in Alzheimer’s disease and mild cognitive impairment group

JSSCBG_2019_v27n1_60_t0002.png 이미지

Table 3. T3, T4, TSH level in Alzheimer’s disease and mild cognitive impairment group

JSSCBG_2019_v27n1_60_t0003.png 이미지

Table 4. Correlation analysis between T3, T4, TSH level and CERAD-K scores*

JSSCBG_2019_v27n1_60_t0004.png 이미지

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