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Acta Diabetologica

, Volume 55, Issue 6, pp 531–539 | Cite as

The association of short-term memory and cognitive impairment with ghrelin, leptin, and cortisol levels in non-diabetic and diabetic elderly individuals

  • Yu Ming Sang
  • Li Jun Wang
  • Hong Xian Mao
  • Xue Yong Lou
  • Yi Jun Zhu
Original Article

Abstract

Aims

This study assessed short-term memory and biochemical indicators with the levels of ghrelin, leptin, and cortisol between cognitive impairment and normal older adults with or without diabetes.

Methods

We enrolled 286 older adults (aged 65–85 years) with or without diabetes from the local community. Short-term memory was assessed using pictures of common objects; cognitive functioning was assessed using the Mini–Mental State Examination (MMSE) and the Montreal Cognitive Assessment (MoCA). The physiological indexes assessed were plasma levels of fasting ghrelin and leptin, ghrelin level at 2_h after breakfast, 24-h urinary cortisol value, body mass index, and plasma cortisol levels at 8:00 a.m., 4:00 p.m., and 12:00 p.m.

Results

In both non-diabetic and diabetic subjects, short-term memory was significantly lower in the impaired cognition group (5.99 ± 2.90 in non-diabetic subjects and 4.71 ± 2.14 in diabetic subjects) than in the normal cognition group (8.14 ± 2.23 in non-diabetic subjects and 7.82 ± 3.37 in diabetic subjects). Baseline ghrelin level was significantly lower in the impaired cognition group (9.07 ± 1.13 ng/mL in non-diabetic subjects and 7.76 ± 1.34 ng/mL in diabetic subjects) than in the normal cognition group (10.94 ± 1.53 ng/mL in non-diabetic subjects and 9.93 ± 1.76 ng/mL in diabetic subjects); plasma cortisol levels at 8:00 a.m., 4:00 p.m., and 12:00 p.m. were significantly higher in the impaired cognition group than in the normal cognition group, while no significant difference was observed in plasma levels of fasting leptin between different groups.

Conclusions

Fasting plasma ghrelin and cortisol levels may be markers of cognitive decline and memory loss. It is possible that adjusting their levels may have a therapeutic effect, and this should be investigated in future studies.

Keywords

Ghrelin Leptin Short-term memory Elderly Cortisol 

Notes

Acknowledgements

We would like to thank the staff of Department of Endocrinology and the Central Laboratory of the JINHUA Central Hospital of the Zhejiang province for their kind cooperation.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

This study complies with ethical standards approved by the ethics committee of the Central Hospital of Jinhua and the academic committee of Zhejiang Normal University.

Informed consent

Written informed consent was obtained from each participant before the interview.

Funding

Research funding to conduct this work was provided by the Jinhua Central Hospital.

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Copyright information

© Springer-Verlag Italia S.r.l., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of EndocrinologyJinhua Central HospitalJinhuaChina
  2. 2.Department of PsychologyZhejiang Normal UniversityJinhuaChina
  3. 3.The Central LaboratoryJinhua Central HospitalJinhuaChina

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