Araştırma Makalesi

The Effects of Thyroid Hormones on Glucokinase Enzyme Activity in diabetic Rat Liver Tissues

Cilt: 2 Sayı: 3 9 Ağustos 2019
  • Duygu Şahin *
  • Nilgün Altan
  • Aylin Sepici-dinçel
  • Atilla Engin
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The Effects of Thyroid Hormones on Glucokinase Enzyme Activity in diabetic Rat Liver Tissues

Öz

Objective: We aimed to investigate the effcts of insulin and various doses of thyroid hormones with combine treatment on glucokinase (GK) enzyme activity, which is the one of the key enzyme in carbohydrate metabolism, diabetes and hypothyroidism. 

Material and methods: Rats were assigned to eight groups: Group 1: control, Group 2: diabetes (DM), Group 3: DM + insulin, Group 4: thyroidectomized control, Group 5: thyroidectomized + DM, Group 6: thyroidectomized + DM + insulin, Group 7: thyroidectomized + DM + insulin + thyroid hormone (TH) (2.5μg/kg), Group 8: thyroidectomized + DM + insulin + TH (5 μg/kg). Glucose concentration, HbA1c and thyroid hormone levels were measured in blood samples and GK enzyme activities were determined in liver tissue samples.

Results: Our results showed that the glucokinase enzyme activities were significantly decreased in diabetic rat liver tissues compared to control group. Moreover it was observed that the enzyme activities were slightly regulated by insulin. It is demonstrated that decreased GK enzyme activity in thyroidectomized diabetic rat liver was regulated by insulin and various doses of thyroid hormones.

Conclusion: As a result the possible contribution of thyroid hormones to insulin effct to normalize diabetic induced changes in liver tissue has been shown.

Anahtar Kelimeler

Kaynakça

  1. 1. American Diabetes Association, Diagnosis and Classification of Diabetes Mellitus. Diabetes Care 2006;29 (Suppl 1):43-48.
  2. 2. Magnuson MA. Glucokinase gene structure: functional implications of molecular genetic studies. Diabetes 1990;39:523-27.
  3. 3. Iynedjian PB, Gjinovci A, Renold AE. Stimulation by insulin of glucokinase gene transcription in liver of diabetic rats. J Biol Che 1988;263(2):740-4.
  4. 4. Magnuson MA, Andreone TL, Printz RL, et al. Rat glucokinase gene: structure and regulation by insulin. Proc Natl Acad Sci 1989;86:4838-42.
  5. 5. Iynedjian PB, Jotterand D, Nouspikel T, et al. Transcriptional induction of glucokinase gene by insulin in cultured liver cells and its repression by the glucagon-cAMP system. J Biol Chem 1989;264(36):21824-9.
  6. 6. Sibrowski W, Seitz HJ. Hepatic glucokinase turnover in intact and adrenalectomized rats in vivo. Eur J Biochem 1980;113(1):121-9.
  7. 7. Postic C, Shiota M, Niswender KD, et al. Dual Roles for Glucokinase Homeostasis as Determined by Liver and Pancreatic β cell-specific Gene Knock-outs Using Cre Recombinase. The Journal of Biological Chemistry 1999;274(1):305-315.
  8. 8. Aiston S, Trinh KY, Lange AJ, et al. Glucose- 6-phosphatase Overexpression Lowers Glucose 6-phosphate and Inhibits Glycogen Synthesis and Glycolysis in Hepatocytes without Affcting Glucokinase Translocation. The Journal of Biological Chemistry 1999;274(35):24559-24566.

Ayrıntılar

Birincil Dil

İngilizce

Konular

Klinik Tıp Bilimleri

Bölüm

Araştırma Makalesi

Yazarlar

Nilgün Altan Bu kişi benim

Aylin Sepici-dinçel Bu kişi benim

Atilla Engin Bu kişi benim

Yayımlanma Tarihi

9 Ağustos 2019

Gönderilme Tarihi

12 Mayıs 2019

Kabul Tarihi

3 Temmuz 2019

Yayımlandığı Sayı

Yıl 2019 Cilt: 2 Sayı: 3

Kaynak Göster

APA
Şahin, D., Altan, N., Sepici-dinçel, A., & Engin, A. (2019). The Effects of Thyroid Hormones on Glucokinase Enzyme Activity in diabetic Rat Liver Tissues. Tıp Fakültesi Klinikleri Dergisi, 2(3), 105-112. https://izlik.org/JA32YE37KH
AMA
1.Şahin D, Altan N, Sepici-dinçel A, Engin A. The Effects of Thyroid Hormones on Glucokinase Enzyme Activity in diabetic Rat Liver Tissues. TFK. 2019;2(3):105-112. https://izlik.org/JA32YE37KH
Chicago
Şahin, Duygu, Nilgün Altan, Aylin Sepici-dinçel, ve Atilla Engin. 2019. “The Effects of Thyroid Hormones on Glucokinase Enzyme Activity in diabetic Rat Liver Tissues”. Tıp Fakültesi Klinikleri Dergisi 2 (3): 105-12. https://izlik.org/JA32YE37KH.
EndNote
Şahin D, Altan N, Sepici-dinçel A, Engin A (01 Ağustos 2019) The Effects of Thyroid Hormones on Glucokinase Enzyme Activity in diabetic Rat Liver Tissues. Tıp Fakültesi Klinikleri Dergisi 2 3 105–112.
IEEE
[1]D. Şahin, N. Altan, A. Sepici-dinçel, ve A. Engin, “The Effects of Thyroid Hormones on Glucokinase Enzyme Activity in diabetic Rat Liver Tissues”, TFK, c. 2, sy 3, ss. 105–112, Ağu. 2019, [çevrimiçi]. Erişim adresi: https://izlik.org/JA32YE37KH
ISNAD
Şahin, Duygu - Altan, Nilgün - Sepici-dinçel, Aylin - Engin, Atilla. “The Effects of Thyroid Hormones on Glucokinase Enzyme Activity in diabetic Rat Liver Tissues”. Tıp Fakültesi Klinikleri Dergisi 2/3 (01 Ağustos 2019): 105-112. https://izlik.org/JA32YE37KH.
JAMA
1.Şahin D, Altan N, Sepici-dinçel A, Engin A. The Effects of Thyroid Hormones on Glucokinase Enzyme Activity in diabetic Rat Liver Tissues. TFK. 2019;2:105–112.
MLA
Şahin, Duygu, vd. “The Effects of Thyroid Hormones on Glucokinase Enzyme Activity in diabetic Rat Liver Tissues”. Tıp Fakültesi Klinikleri Dergisi, c. 2, sy 3, Ağustos 2019, ss. 105-12, https://izlik.org/JA32YE37KH.
Vancouver
1.Duygu Şahin, Nilgün Altan, Aylin Sepici-dinçel, Atilla Engin. The Effects of Thyroid Hormones on Glucokinase Enzyme Activity in diabetic Rat Liver Tissues. TFK [Internet]. 01 Ağustos 2019;2(3):105-12. Erişim adresi: https://izlik.org/JA32YE37KH


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