TY - JOUR
T1 - Melatonin concentrations and sleep quality in patients with type 2 diabetes and obesity
AU - Kalere, Ieva
AU - Konrade, Ilze
AU - Proskurina, Anna
AU - Upmale, Sabine
AU - Zaķe, Tatjana
AU - Limba, Normunds
AU - Krieviņa, Gita
AU - Lejnieks, Aivars
AU - Tretjakovs, Peteris
N1 - Funding Information:
The publication was supported in part by grant No. 2014.10-4/VPP-1.1.2 and -5.1.2 in the framework of the Latvian National Programme.
Publisher Copyright:
© 2019 Ieva Kalere et al., published by Sciendo 2019.
PY - 2019/5/1
Y1 - 2019/5/1
N2 - There is a close relationship between melatonin as a circadian regulator and insulin, glucagon and somatostatin production. This study aimed to describe subgroups of type 2 diabetes mellitus (T2DM) patients that may benefit from melatonin clock-targeting properties. The study involved 38 participants: 26 T2DM patients, and 12 participants without diabetes in the control group. Subjects were asked to complete the questionnaire of Pittsburgh Sleep Quality Index (PSQI). Standard biochemical venous sample testing was performed, and a sample of saliva was collected for melatonin testing. Melatonin concentration in participants without obesity (body mass index (BMI) < 30 kg/m 2 ) was significantly higher than in obese participants: 13.2 (6.4; 23.50) pg/ml vs 5.9 (0.78; 13.1) pg/ml, p = 0.035. Subjects with BMI 30 kg/m 2 had a significantly higher PSQI score than non-obese subjects: 7 (4.5; 10) vs 5.5 (3; 7), p = 0.043. T2DM patients showed significantly lower levels of melatonin than the control group: 6.1 (0.78; 12.2) pg/ml vs 17.8 (8.2; 25.5) pg/ml, p = 0.003. T2DM patients using short-acting insulin analogues showed a significantly higher PSQI score than patients not using insulin: 9 (6; 10) vs 6 (3; 8), respectively (p = 0.025). Poor sleep quality was more prevalent in patients with diabetic retinopathy than in those without this complication (p = 0.031). Lower melatonin levels were detected in T2DM and obese patients. Furthermore, poor sleep quality was observed in T2DM patients using short-acting insulin analogues and those with diabetic retinopathy, and obese individuals.
AB - There is a close relationship between melatonin as a circadian regulator and insulin, glucagon and somatostatin production. This study aimed to describe subgroups of type 2 diabetes mellitus (T2DM) patients that may benefit from melatonin clock-targeting properties. The study involved 38 participants: 26 T2DM patients, and 12 participants without diabetes in the control group. Subjects were asked to complete the questionnaire of Pittsburgh Sleep Quality Index (PSQI). Standard biochemical venous sample testing was performed, and a sample of saliva was collected for melatonin testing. Melatonin concentration in participants without obesity (body mass index (BMI) < 30 kg/m 2 ) was significantly higher than in obese participants: 13.2 (6.4; 23.50) pg/ml vs 5.9 (0.78; 13.1) pg/ml, p = 0.035. Subjects with BMI 30 kg/m 2 had a significantly higher PSQI score than non-obese subjects: 7 (4.5; 10) vs 5.5 (3; 7), p = 0.043. T2DM patients showed significantly lower levels of melatonin than the control group: 6.1 (0.78; 12.2) pg/ml vs 17.8 (8.2; 25.5) pg/ml, p = 0.003. T2DM patients using short-acting insulin analogues showed a significantly higher PSQI score than patients not using insulin: 9 (6; 10) vs 6 (3; 8), respectively (p = 0.025). Poor sleep quality was more prevalent in patients with diabetic retinopathy than in those without this complication (p = 0.031). Lower melatonin levels were detected in T2DM and obese patients. Furthermore, poor sleep quality was observed in T2DM patients using short-acting insulin analogues and those with diabetic retinopathy, and obese individuals.
KW - melatonin
KW - obesity
KW - sleep quality
KW - type 2 diabetes
UR - http://www.scopus.com/inward/record.url?scp=85065672850&partnerID=8YFLogxK
U2 - 10.2478/prolas-2019-0024
DO - 10.2478/prolas-2019-0024
M3 - Article
AN - SCOPUS:85065672850
SN - 1407-009X
VL - 73
SP - 152
EP - 157
JO - Proceedings of the Latvian Academy of Sciences, Section B: Natural, Exact, and Applied Sciences
JF - Proceedings of the Latvian Academy of Sciences, Section B: Natural, Exact, and Applied Sciences
IS - 2
ER -