ABSTRACT
Glucose is the basic metabolic substrate and main source of energy for the body. A complex neuroendocrine system regulate blood glucose concertration to keep it at a constant level. Thyroid hormones participate in the regulation of glucose metabolism through the PI3K/ERK and other signaling pathways. At the same time, abnormal glucose metabolism can cause the abnormal regulation of hypothalamus pituitary thyroid axis. In this paper, we review the change and molecular mechanism of thyroid hormone, thyroid stimulating hormone and thyroid releasing hormone in Hypoglycemia and Hyperglycemia.
ABSTRACT
Objective To explore the alteration of the peripheral thyroid hormone level in patients with chronic alcohol dependence and its relationship with depressive emotion.Methods Data were collected from 21 male patients with chronic alcohol dependence (case group) and 21 male health control (control group).Hamilton Depression Scale-24 (HAMD-24) and Alcohol Dependence Screening Scale (MAST) were used.The level of thyroid stimulating hormone (TSH),free triiodothyronine (FT3),free thyroxine (FT4),triiodothyronine (T3) and four iodine thyroxine (T4) of case group and control group were separately determined.The level of above-mentioned hormones and scale score of case group were evaluated in the first and sixth week of the period of temperance.Data of control group were collected once at baseline.Results The level of FT3 in case group was decreased significantly in the first week of the period of temperance compared with the control group ((4.34± 1.01) pmol/L,(5.85 ± 0.78) pmol/L,t =5.56,P＜ 0.01),while the level of TSH in case group was increased((2.62±0.69) uIU/ml,(1.70±0.81)uIU/ml,t=-3.96,P＜0.01).The level of FT3 and T3 in case group decreased significantly in the sixth week of the period of temperance comparedwith the control group(FT3:(5.22±0.92) pmol/L,(5.85±0.78) pmol/L,t=2.45,P＜ 0.05;T3:(1.54±0.54)pmol/L,(1.84±0.34)pmol/L,t=2.92,P＜0.01).The level of FT3 of the case group in the first week decreased significantly compared with the sixth week in the period of temperance (t=-4.12,P＜0.01),while the level of FT4 were increased significantly (t=-3.93,P＜0.01).In case group,the scores of HAMD-24 and the level of T3 (r=-0.465,P＜0.05),TSH (r=-0.489,P＜0.05) were negative correlation in the first week of the period of temperance.No correlation were observed between the score of HAMD-24 and the level of FT3,FT4,TSH,T3,T4 (r=-0.303-0.047,all P＞ 0.05)in the sixth week of the period of temperance.Conclusion The level of serum thyroid is disordered in patients with chronic alcohol dependence.The disorder will recover in the period of temperance and is associated with depressive emotion.
ABSTRACT
Objective To explore the alteration of the peripheral thyroid hormone level in patients with chronic alcohol dependence and its relationship with depressive emotion.Methods Data were collected from 21 male patients with chronic alcohol dependence (case group) and 21 male health control (control group).Hamilton Depression Scale-24 (HAMD-24) and Alcohol Dependence Screening Scale (MAST) were used.The level of thyroid stimulating hormone (TSH),free triiodothyronine (FT3),free thyroxine (FT4),triiodothyronine (T3) and four iodine thyroxine (T4) of case group and control group were separately determined.The level of above-mentioned hormones and scale score of case group were evaluated in the first and sixth week of the period of temperance.Data of control group were collected once at baseline.Results The level of FT3 in case group was decreased significantly in the first week of the period of temperance compared with the control group ((4.34± 1.01) pmol/L,(5.85 ± 0.78) pmol/L,t =5.56,P＜ 0.01),while the level of TSH in case group was increased((2.62±0.69) uIU/ml,(1.70±0.81)uIU/ml,t=-3.96,P＜0.01).The level of FT3 and T3 in case group decreased significantly in the sixth week of the period of temperance comparedwith the control group(FT3:(5.22±0.92) pmol/L,(5.85±0.78) pmol/L,t=2.45,P＜ 0.05;T3:(1.54±0.54)pmol/L,(1.84±0.34)pmol/L,t=2.92,P＜0.01).The level of FT3 of the case group in the first week decreased significantly compared with the sixth week in the period of temperance (t=-4.12,P＜0.01),while the level of FT4 were increased significantly (t=-3.93,P＜0.01).In case group,the scores of HAMD-24 and the level of T3 (r=-0.465,P＜0.05),TSH (r=-0.489,P＜0.05) were negative correlation in the first week of the period of temperance.No correlation were observed between the score of HAMD-24 and the level of FT3,FT4,TSH,T3,T4 (r=-0.303-0.047,all P＞ 0.05)in the sixth week of the period of temperance.Conclusion The level of serum thyroid is disordered in patients with chronic alcohol dependence.The disorder will recover in the period of temperance and is associated with depressive emotion.
ABSTRACT
Objective: To investigate the effect of melatonin (Mel) on hormone secretion and tissue ultrastructure of hypothalamus-pituitary-thyroid axis(HPTA) in rats. Methods: A total of 60 male Sprague-Dawley rats were evenly randomized into four groups: control, low-dose Mel(0.5 mg·kg -1·d-1), middle-dose Mel(10 mg·kg -1·d-1), and high-dose Mel(50 mg·kg -1·d-1) group. The rats in the latter 3 groups received intraperitoneal injection of different doses of Mel daily. At 1 st, 2nd and 3rd weeks after treatment, rats were sacrificed and blood serum samples, hypothalamus, pituitary and thyroid tissues were obtained. Serum T3, T4, FT3, FT4 and TSH levels were estimated by radioimmunoassay (RIA). Expression of proTRH mRNA in hypothalamus tissues were detected by real time RT-PCR. The ultrastructures of hypothalamus, pituitary and thyroid were observed under transmission electronic microscope. Results: The serum levels of T4, FT3, FT4 and TSH in the middle-dose and high-dose Mel groups were significantly decreased compared with those in the control and low-dose Mel group at 1st, 2nd and 3rd weeks(P<0.01). T4 levels decreased in the middle-dose and high-dose Mel groups at a weekly basis, with significant difference found between different weeks (P<0.01). TSH level was deceased at the 2nd week, and that at the 3rd week was significantly lower than those at the first two weeks (P<0.01). The expression of proTRH mRNA was lower in high-dose Mel group compared to that in the control group at 1st, 2nd and 3rd weeks. With the prolongation of Mel treatment, expression of proTRH mRNA had a decreasing tendency first and an increasing tendency later. No obvious pathological ultrastructure changes were found in the hypothalamus, pituitary and thyroid tissues. Conclusion: Melatonin may inhibit Hypothalamus-Pituitary-Thyroid axis in a time- and dose-dependent manner in rats.