The number of diabetic patients has recently been increasing all over the world together with lifestyle changes including sedentary life and high-calorie diet intake, and as a result the increase in these suffering fr...The number of diabetic patients has recently been increasing all over the world together with lifestyle changes including sedentary life and high-calorie diet intake, and as a result the increase in these suffering from diabetes mellitus has become a global issue. Diabetic animal models play a key role in bettering our understanding of the pathophysiology of diabetes and in developing new therapies for the disease. Diabetes is classified into two types, type 1 and type 2, and type 2 diabetes is chiefly caused by a depletion of insulin secretion in the pancreas and insulin resistance in peripheral tissues. The Goto-Kakizaki (GK) rat and the Spontaneously Diabetic Torii (SDT) rat are genetic non-obese type 2 diabetic models, and the both rats are considered to be suitable models for investigating the etiology of the depletion of insulin secretion and impaired glucose tolerance. In this review, we overviewed the outline of pathophysiological features in GK rats and SDT rats, including biological parameters and pharmacological responses.展开更多
[目的]探讨五子降糖方对二肽基肽酶Ⅳ(DPP-4)活性的影响,研究其发挥降糖作用的可能机制。[方法]选取SPF级雄性GK大鼠,适应性喂养1周后给予高脂饲料,连续喂养4周,测定血糖,以随机血糖>11.1 mmol/L或餐后2 h血糖(2 h PG)>16.7 mmol/...[目的]探讨五子降糖方对二肽基肽酶Ⅳ(DPP-4)活性的影响,研究其发挥降糖作用的可能机制。[方法]选取SPF级雄性GK大鼠,适应性喂养1周后给予高脂饲料,连续喂养4周,测定血糖,以随机血糖>11.1 mmol/L或餐后2 h血糖(2 h PG)>16.7 mmol/L为成模标准,将成模2型糖尿病(T2DM)大鼠随机分为模型组、二甲双胍组(0.1 g/kg)、五子降糖方低、中、高剂量组(3.5、7.0、14 g/kg,折合生药量),同时另选Wstar大鼠为正常组,正常组与模型组灌胃等体积纯净水,灌胃前测定空腹血糖(FBG),灌胃后4周、8周测定FBG及2 h PG,8周后处死动物,检测血清C肽(CP)水平;采用发色底物法建立DPP-4抑制剂体外筛选模型,分别应用五子降糖方及其组方的各味单药菟丝子、女贞子、紫苏子、莱菔子、车前子水提物对DPP-4抑制剂体外筛选模型进行干预,以磷酸西格列汀片作为阳性对照药,测定A值,计算DPP-4抑制率,比较IC50差异。[结果]五子降糖方可降低T2DM大鼠FBG及2 h PG,增高血清C-P水平;对DPP-4抑制作用,五子降糖方IC50为(6 667.754±2 119.759)mg/L,其组成药物中莱菔子IC50为(382.554±7.750)mg/L,菟丝子IC50为(843.391±135.230)mg/L。[结论]五子降糖方可以降低T2DM FBG及2 h PG,改善胰岛β细胞功能,作用机制可能与DPP-4抑制作用有关,其中莱菔子、菟丝子可能是本方发挥DPP-4抑制作用的主要药物。展开更多
文摘The number of diabetic patients has recently been increasing all over the world together with lifestyle changes including sedentary life and high-calorie diet intake, and as a result the increase in these suffering from diabetes mellitus has become a global issue. Diabetic animal models play a key role in bettering our understanding of the pathophysiology of diabetes and in developing new therapies for the disease. Diabetes is classified into two types, type 1 and type 2, and type 2 diabetes is chiefly caused by a depletion of insulin secretion in the pancreas and insulin resistance in peripheral tissues. The Goto-Kakizaki (GK) rat and the Spontaneously Diabetic Torii (SDT) rat are genetic non-obese type 2 diabetic models, and the both rats are considered to be suitable models for investigating the etiology of the depletion of insulin secretion and impaired glucose tolerance. In this review, we overviewed the outline of pathophysiological features in GK rats and SDT rats, including biological parameters and pharmacological responses.
文摘[目的]探讨五子降糖方对二肽基肽酶Ⅳ(DPP-4)活性的影响,研究其发挥降糖作用的可能机制。[方法]选取SPF级雄性GK大鼠,适应性喂养1周后给予高脂饲料,连续喂养4周,测定血糖,以随机血糖>11.1 mmol/L或餐后2 h血糖(2 h PG)>16.7 mmol/L为成模标准,将成模2型糖尿病(T2DM)大鼠随机分为模型组、二甲双胍组(0.1 g/kg)、五子降糖方低、中、高剂量组(3.5、7.0、14 g/kg,折合生药量),同时另选Wstar大鼠为正常组,正常组与模型组灌胃等体积纯净水,灌胃前测定空腹血糖(FBG),灌胃后4周、8周测定FBG及2 h PG,8周后处死动物,检测血清C肽(CP)水平;采用发色底物法建立DPP-4抑制剂体外筛选模型,分别应用五子降糖方及其组方的各味单药菟丝子、女贞子、紫苏子、莱菔子、车前子水提物对DPP-4抑制剂体外筛选模型进行干预,以磷酸西格列汀片作为阳性对照药,测定A值,计算DPP-4抑制率,比较IC50差异。[结果]五子降糖方可降低T2DM大鼠FBG及2 h PG,增高血清C-P水平;对DPP-4抑制作用,五子降糖方IC50为(6 667.754±2 119.759)mg/L,其组成药物中莱菔子IC50为(382.554±7.750)mg/L,菟丝子IC50为(843.391±135.230)mg/L。[结论]五子降糖方可以降低T2DM FBG及2 h PG,改善胰岛β细胞功能,作用机制可能与DPP-4抑制作用有关,其中莱菔子、菟丝子可能是本方发挥DPP-4抑制作用的主要药物。
