DPP-4 inhibitors and GLP-1RAs:cardiovascular safety and benefits

Glucagon-like peptide-1 receptor agonists(GLP-1RAs)and dipeptidyl peptidase-4 inhibitors are commonly used treatments for patients with type 2 diabetes mellitus(T2DM).Both anti-diabetic treatments function by playing key modulatory roles in the incretin system.Though these drugs have been deemed effective in treating T2DM,the Food and Drug Administration(FDA)and some members of the scientific community have questioned the safety of these therapeutics relative to important cardiovascular endpoints.As a result,since 2008,the FDA has required all new drugs for glycemic control in T2DM patients to demonstrate cardiovascular safety.The present review article strives to assess the safety and benefits of incretin-based therapy,a new class of antidiabetic drug,on the health of patient cardiovascular systems.In the process,this review will also provide a physiological overview of the incretin system and how key components function in T2DM.

Relook at DPP-4 inhibitors in the era of SGLT-2 inhibitors

SGLT-2 inhibitors(SGLT-2Is)have significantly improved cardio-renal outcomes and are preferred agents in people with cardiovascular diseases,heart failure,and diabetic kidney disease.Similarly,GLP-1 receptor agonists(GLP-1RAs)have significantly improved atherosclerotic cardiovascular outcomes.To this end,DPP-4 inhibitors(DPP-4Is)are cardiac-neutral drugs.While long-acting GLP-1RAs have shown a favorable HbA1c lowering compared to DPP-4Is,there is no clinically meaningful HbA1c lowering difference between SGLT-2Is vs DPP-4Is.Moreover,the glucose-lowering potential of SGLT-2Is gets compromised with a progressive decline in renal functions,unlike DPP-4Is.Furthermore,the HbA1c lowering potential of DPP-4Is is favorable in people with T2DM having a modest baseline HbA1c(8.0%-8.5%)compared with SGLT-2Is which lowers HbA1c larger in a background of higher baseline HbA1c(>8.5%-9.0%).These findings suggest that the role of DPP-4Is in the management of type 2 diabetes mellitus cannot be completely ignored even in the era of SGLT-2Is.

Dipeptidyl Peptidase-4 Inhibitors and Inflammation: Dpp-4 Inhibitors Improve Mean Pleatelet Volume and Gamma Glutamyl Transferase Level

AIM: The purpose of this research was to determine the changes of the inflammatory parameters in the long term with the use of dipeptidyl peptidase-4 inhibitors. Material and Methods: In this research we have retrospectively reviewed the records of 80 patients who had added dipeptidyl peptidase-4 inhibitors (40 sitagliptin and 40 vildagliptin) to their ongoing therapies. Patients’ values of inflammation at the beginning of this process were taken as initial values, while values at the end of this process were considered as final values. Results: A total of 80 patients [38.8% (n = 31) of the patients were male, while 61.3% (n = 49) were female] enrolled in the study. When the whole group was evaluated, the mean age was 56.1 ± 9.7 years. The median follow-up time of the patients with DPP-4 inhibitors was 18 (2 - 64) months. The mean MPV value was measured as 8.79 ± 1.71 fL before DPP-4 inhibitors and it was 10.06 ± 1.42 fL after the follow-up period (p < 0.001). The median value serum GGT was 30.5 (13 - 194) U/L before DPP-4 inhibitor and 29.5 (12 - 112) U/L at the end (p = 0.048). The mean uric acid level before the use of di-peptidyl peptidase-4 inhibitors was 4.7 ± 1.6 mg/dL, and this level was 5.0 ± 1.5 mg/dL after the follow-up period (p = 0.048). Conclusion: In this study, it was observed that MPV and GGT levels were improved by dipeptidyl peptidase-4 inhibitors in long-term.

DPP-4抑制剂治疗2型糖尿病合并非酒精性脂肪肝的作用研究进展

二肽基肽酶4(DPP-4)抑制剂是一种较新类型的糖尿病治疗药物,其主要的降糖机制是通过减少肠促胰素降低,来提高内源性胰高血糖素样肽1,进而促进胰岛素分泌与抑制胰高血糖素分泌,降低机体血糖水平。2型糖尿病(T2DM)与非酒精性脂肪肝(NAFLD)是临床常见的疾病类型,发病率居高不下。T2DM和NAFLD能够相互影响,相互促进,T2DM合并NAFLD不仅容易提高心血管疾病的患病风险与加重内分泌代谢紊乱,而且容易推动NAFLD病情进展,导致出现肝硬化、肝癌等恶性病变。目前大量研究显示,DPP-4抑制剂能够有效降低T2DM患者血糖水平和改善胰岛素抵抗,且对NAFLD具有较好的预防作用。本文从DPP-4抑制剂对治疗T2DM合并NAFLD的疗效与安全性方面进行综述。

达格列净联合DPP-4抑制剂用于2型糖尿病临床治疗的价值分析

目的分析2型糖尿病(Type 2 Diabetes Mellitus,T2DM)在达格列净联合二肽基肽酶-4(Dipeptidyl Pepti-dase-4,DPP-4)抑制剂治疗下的实际改善效果。方法选取2020年2月—2023年3月福州经济技术开发区医院100例T2DM患者作为研究对象,根据既往治疗方案分成参照组(50例,二甲双胍+DPP-4抑制剂)和观察组(50例,二甲双胍+DPP-4抑制剂+达格列净),比较药物不良反应率、血肌酐(Serum Creatinine,Scr)、血尿酸(Blood Uric Acid,BUA)、胆固醇(Total Cholesterol,TC)、三酰甘油(Triglyceride,TG)、餐后2 h血糖(2 h Post-prandial Plasma Glucose,2 hPG)、空腹血糖(Fasting Plasma Glucose,FPG)指标。结果治疗后观察组患者BUA为(302.56±38.28)μmol/L,TC为(4.29±0.74)mmol/L,TG为(1.43±0.44)mmol/L,2 hPG为(9.32±0.42)mmol/L,FPG为(6.42±0.15)mmol/L,低于参照组,差异有统计学意义(t=2.023、5.235、2.284、6.515、26.524,P均<0.05);两组Scr指标及药物不良反应率对比,差异无统计学意义(P均>0.05)。结论达格列净与DPP-4抑制剂联合应用于T2DM治疗中效果优良。

DPP-4抑制剂参与调控糖尿病肾病机制的研究进展

糖尿病肾病(Diabetic kidney disease,DKD)的特征表现为蛋白尿和肾小球滤过率的降低,是造成终末期肾病的主要原因之一.早期干预糖尿病(Diabetes mellitus,DM)患者的血糖、血压和血脂等异常危险因素,对预防DKD的发生和发展较重要^([1]).研究^([2])结果显示降糖、降脂以及阻断肾素-血管紧张素-醛固酮系统治疗虽然可以降低DKD患者的尿蛋白水平,抑制其肾脏纤维化。

GLP-1受体激动剂和DPP-4抑制剂分别联合二甲双胍治疗T2DM的疗效及对血清抗氧化因子、炎症因子的影响

目的对比胰高血糖素样肽-1(GLP-1)受体激动剂和二肽基肽酶-4(DPP-4)抑制剂分别联合二甲双胍治疗2型糖尿病(T2DM)的疗效及对其血清抗氧因子、炎症因子的影响。方法将2020年5月至2022年5月中国中医科学院广安门医院南区收治的120例T2DM患者纳入本次前瞻性研究,采用随机数字表法分成GLP-1联合组(n=40)、DPP-4联合组(n=40)和对照组(n=40)。GLP-1联合组患者治疗方案为二甲双胍治疗+利拉鲁肽,DPP-4联合组患者治疗方案为二甲双胍+沙格列汀,对照组患者仅口服二甲双胍治疗。治疗为期6个月。比较3组患者治疗前后的血糖相关指标[空腹血糖、餐后2 h血糖(2 h PPG)、糖化血红蛋白(HbA1c)]及胰岛素抵抗指数(HOMA-IR)、氧化应激指标[超氧化物歧化酶(SOD)和6-酮-前列环素F1α(6-Keto-PGF1α)]和炎症因子[肿瘤坏死因子-α(TNF-α)、白细胞介素-6(IL-6)和超敏C反应蛋白(hs-CRP)]表达情况。结果GLP-1联合组治疗后的空腹血糖、2 hPPG、HbA1c和HOMA-IR分别为(5.05±0.69)mmol/L、(7.42±0.98)mmol/L、(6.11±0.70)%和(3.20±0.45),DPP-4联合组分别为(5.58±0.61)mmol/L、(8.09±1.04)mmol/L、(6.65±0.76)%和(3.78±0.50),对照组分别为(6.50±0.75)mmol/L、(10.14±1.22)mmol/L、(7.80±0.81)%和(4.61±0.59),GLP-1联合组与DPP-4联合组治疗后的上述血糖相关指标及HOMA-IR均较对照组显著下降,且GLP-1联合组显著低于DPP-4联合组,差异均有统计学意义(P<0.05)。GLP-1联合组治疗后的SOD和6-Keto-PGF1α分别为(95.09±9.97)U/mL、(76.19±6.80)ng/L,DPP-4联合组分别为(85.17±10.18)U/mL、(67.32±6.39)ng/L,对照组分别为(76.89±9.06)U/mL、(60.46±6.02)ng/L,GLP-1联合组与DPP-4联合组治疗后的血清SOD、6-Keto-PGF1α均较对照组显著上升,且GLP-1联合组血清SOD、6-Keto-PGF1α均较DPP-4联合组显著上升,差异均有统计学意义(P<0.05)。GLP-1联合组TNF-α、IL-6和hs-CRP分别为(7.05±1.16)ng/L、(5.01±1.35)pg/mL、(4.04±0.51)mg/L,DPP-4联合组为(7.93±1.29)ng/L、(5.97±1.40)pg/mL、(4.99±0.59)mg/L,对照组为(10.34±1.58)ng/L、(7.58±1.49)pg/mL、(5.94±0.64)mg/L,GLP-1联合组与DPP-4联合组治疗后的上述血清炎症因子均较对照组显著下降,且GLP-1联合组显著低于DPP-4联合组,差异均有统计学意义(P<0.05)。结论GLP-1受体激动剂联合二甲双胍治疗T2DM的降糖效果优于DPP-4受体抑制剂联合二甲双胍,在改善胰岛素抵抗和氧化应激,降低炎症反应方面同样优于DPP-4受体抑制剂联合二甲双胍治疗。

二甲双胍联合DPP-4抑制剂对2型糖尿病伴慢性牙周炎患者牙槽骨密度的影响

目的:探讨二甲双胍联合二肽基肽酶4(DPP-4)抑制剂对2型糖尿病伴慢性牙周炎患者牙周组织的影响。方法:选择2型糖尿病伴慢性牙周炎患者80例,利用随机数字表法随机分为A组和B组,每组各40例。A组口服二甲双胍同时进行牙周基础治疗;B组在A组的基础上同时口服DPP-4抑制剂。测量2组患者治疗前(T0)及治疗后3个月(T1)、6个月(T2)的牙槽骨密度(BMD)、牙周探诊深度(PD)、临床附着丧失(CAL)、探诊出血(BOP)、糖化血红蛋白(HbA1c)、血磷、血钙、脂联素(ADP)、瘦素(LEP)、白细胞介素6(IL-6)、C反应蛋白(CRP)、肿瘤坏死因子α(TNF-α)等指标。采用SPSS 23.0软件包对数据进行统计学分析。结果:T0时,2组各临床指标均无显著差异;T1、T2时,B组的PD、CAL、BOP、HbAlc显著低于A组(P<0.05);B组的BMD显著高于A组(P<0.05);B组的炎症细胞因子水平(IL-6、CRP、TNF-α)、LEP水平显著低于A组,ADP水平显著高于A组(P<0.05)。结论:二甲双胍联合DPP-4抑制剂可使2型糖尿病伴慢性牙周炎患者牙槽骨密度增加,并有效改善牙周临床指标和血清生化指标,减轻牙周组织炎症。

基于FAERS数据库的周期蛋白依赖性激酶4/6抑制剂血液毒性真实世界研究

目的 基于美国美国食品药品管理局(FDA)的不良事件报告系统(FAERS)分析3种周期蛋白依赖性激酶4/6(CDK4/6)抑制剂上市后的不良事件(AEs)信号,为临床用药安全提供参考。方法 提取FAERS数据库2015年第一季度至2022年第一季度共29个季度AEs,利用报告比值比法(ROR)和比例报告比值法(PRR)对CDK4/6抑制剂AEs进行数据挖掘。结果 CDK4/6抑制剂相关性血液毒性报告共有7 872份,各抑制剂血液毒性AEs占总AEs比例依次为哌柏西利(80.31%)>瑞博西利(15.36%)>阿贝西利(4.33%)。血液毒性常见中性粒细胞减少和贫血。哌柏西利(2 982/6 322,47.17%)和瑞博西利(613/1 209,50.70%)致中性粒细胞减少的报告占比较阿贝西利(117/341,34.31%)更高,血液毒性主要发生在药物开始使用后60 d内(1 630,61.86%),哌柏西利中位时间最长,且用药90 d后仍有32.9%的患者存在血液毒性,不同CDK4/6抑制剂血液毒性临床表现及发生强度存在差异。结论 哌柏西利、阿贝西利、瑞博西利均会导致明显的血液毒性,其中阿贝西利致血液毒性报告最少,但要警惕阿贝西利致贫血后导致死亡的风险。用药后的2个月内密切监测全血细胞计数,关注中性粒细胞、血红蛋白等水平,警惕CDK4/6抑制剂相关血液AEs的发生。

基于医院卫生技术评估的5种二肽基肽酶4抑制剂的临床应用情况

目的通过医院卫生技术评估(HB-HTA)对5种二肽基肽酶4抑制剂(DPP-4i)(西格列汀、维格列汀、沙格列汀、利格列汀和阿格列汀)进行评估,为医疗机构药品的遴选、临床的合理安全使用提供依据。方法通过HB-HTA,依照百分制评分体系,参考药品说明书、临床指南和文献,从安全性、有效性、经济型、创新性、适宜性和可及性等方面分别对5种DPP-4i进行评估。结果西格列汀、维格列汀、沙格列汀、利格列汀和阿格列汀得分分别为85.0、75.0、77.0、80.0、78.5分。评分差异主要在安全性、经济性、适宜性和可及性方面。西格列汀综合得分最高。结论HB-HTA评估DPP-4i结果比较合理,为医院药品遴选、安全合理使用提供依据。

血清LncRNA FAF、ITIH4在慢性心力衰竭患者中的表达意义及对预后的预测价值

目的探讨血清长链非编码RNA(LncRNA)FAF、间α胰蛋白酶抑制因子重链4(ITIH4)在慢性心力衰竭(CHF)患者中的表达意义及对预后的预测价值。方法选择2020年1月—2022年1月安徽医科大学第二附属医院急诊内科收治的CHF患者187例为CHF组,再根据NYHA心功能分级分为Ⅱ级亚组65例,Ⅲ级亚组77例,Ⅳ级亚组45例。于同期招募健康志愿者103例为健康对照组。2组受试者均检测血清LncRNA FAF表达和ITIH4水平,CHF患者出院后随访12个月,统计随访期间主要不良心血管事件(MACE)发生率;多因素Logistic回归分析影响CHF患者发生MACE的因素;受试者工作特征(ROC)曲线分析LncRNA FAF、ITIH4预测CHF患者发生MACE的价值。结果CHF组血清LncRNA FAF表达、ITIH4水平低于健康对照组(t/P=24.469/<0.001、35.196/<0.001)。血清LncRNA FAF表达、ITIH4水平Ⅳ级亚组低于Ⅲ级亚组低于Ⅱ级亚组(F/P=91.653/<0.001、102.345/<0.001)。MACE亚组血清LncRNA FAF表达,ITIH4水平低于非MACE亚组(t/P=13.556/<0.001、6.293/<0.001)。NYHAⅣ级、高水平NT-proBNP是CHF患者发生MACE的危险因素[OR(95%CI)=4.627(2.245~9.538)、2.284(1.505~3.468)],高表达LncRNA FAF、高水平ITIH4是保护因素[OR(95%CI)=0.599(0.425~0.844)、0.666(0.478~0.928)]。LncRNA FAF、ITIH4及二者联合预测CHF患者发生MACE的曲线下面积为0.796、0.801、0.896,二者联合预测曲线下面积高于单独预测(Z=2.453、2.404,均P<0.001)。结论CHF患者血清LncRNA FAF表达和ITIH4水平均降低,且与不良预后有关,联合LncRNA FAF和ITIH4可预测CHF患者预后不良风险。

CDK4/6抑制剂在HR^(+)晚期乳腺癌治疗中的耐药机制及进展后治疗策略

细胞周期蛋白依赖性激酶4/6(CDK4/6)抑制剂联合内分泌治疗已成为激素受体阳性(HR^(+))、人类表皮生长因子受体-2阴性(HER2^(-))乳腺癌患者的晚期一线及二线标准治疗方案。尽管CDK4/6抑制剂可实现有效的疾病控制,但对于晚期乳腺癌患者最终仍会因耐药出现疾病进展。目前CDK4/6抑制剂相关耐药机制尚不完全清楚,同时治疗失败后的最佳治疗策略仍是一个亟待解决的问题。本文就CDK4/6抑制剂的潜在耐药机制和后续治疗策略的最新研究进展做一综述。

DPP4抑制剂在2型糖尿病中的临床应用及研究进展

2型糖尿病(Type 2 Diabetes Mellitus,T2DM)在我国具有较高的发病率,是中老年患者常见的一种慢性代谢疾病,可累及心脑血管等多个系统发生病变,危及生命安全,需及时治疗。二肽基肽酶-4(Dipeptidyl Peptidase-4,DPP4)可促进胰岛素生成,并分泌胰高血糖素,与T2DM有着密切关联,是目前我国T2DM治疗研究中的一个新方向。DPP4抑制剂是多项研究的结果,能够提高降糖效果,对多种降糖无效的患者均有显著作用。基于此,本文主要综述了DPP4抑制剂治疗T2DM的作用机制,分析DPP4抑制剂在T2DM中的应用及研究进展,以期为T2DM治疗提供参考。

SGLT-2抑制剂与DPP-4抑制剂联用二甲双胍治疗2型糖尿病的疗效分析

目的研究钠-葡萄糖协同转运蛋白2(sodium-dependent glucose transporters 2,SGLT-2)抑制剂与二肽基肽酶4(dipeptidyl peptidase 4,DPP-4)抑制剂联合二甲双胍治疗2型糖尿病的疗效与安全性。方法选取2019年6月—2020年6月凉山彝族自治州第二人民医院收治的100例2型糖尿病患者进行研究,并运用随机数表法将其分为对照组(n=50)和研究组(n=50)。对照组采用DPP-4抑制剂+二甲双胍治疗,研究组采用SGLT-2抑制剂+DPP-4抑制剂+二甲双胍治疗。对比治疗前后两组血糖指标、体质指数(BMI)变化情况、不良反应发生情况。结果治疗前,两组患者血糖指标、BMI比较,差异无统计学意义(P>0.05)。治疗后,研究组空腹血糖、餐后2 h血糖、糖化血红蛋白水平及BMI低于对照组,差异有统计学意义(P<0.05)。两组患者不良反应发生率比较,差异无统计学意义(P>0.05)。结论采用SGLT-2抑制剂+DPP-4抑制剂+二甲双胍进行治疗,可以改善2型糖尿病患者血糖水平,控制患者体质量,总体疗效良好。

Design and synthesis of DPP-4 inhibitor for the treatment of type 2 diabetes

An efficient stereoselective synthesis of the rigid aza-bicyclo[3.2.0]heptane scaffold has been developed to provide 2-cyano-pyrrolidine alpha-amino amide 1 as DPP-4 inhibitor.

Repositioning of dipeptidyl peptidase-4 inhibitors and glucagon like peptide-1 agonists as potential neuroprotective agents

Repositioning of dipeptidyl peptidase-4 inhibitors and glucagon like peptide-1 receptor agonists is a breakthrough in the field of neural regeneration research increasing glucagon like peptide-1 bioavailability, hence its neuroprotective activities. In this article, the authors suggest not only crossing blood-brain barrier and neurodegenerative disease as off target for dipeptidyl peptidase-4 inhibitors and glucagon like peptide-1 receptor agonists, but also for ophthalmic preparations for diabetic retinopathy, which may be the latest breakthrough in the field if prepared and used in an appropriate nano-formulation to target the retinal nerves. The relation of neurodegenerative diseases' different mechanisms to the dipeptidyl peptidase-4 inhibitors and glucagon like peptide-1 receptor agonists should be further examined in preclinical and clinical settings. The repositioning of already marketed antidiabetic drugs for neurodegenerative diseases should save the high cost of the time-consuming normal drug development process. Drug repositioning is a hot topic as an alternative to molecular target based drug discovery or therapeutic switching. It is a relatively inexpensive pathway due to availability of previous pharmacological and safety data. The glucagon like peptide-1 produced in brain has been linked to enhanced learning and memory functions as a physiologic regulator in central nervous system by restoring insulin signaling. Intranasal administration of all marketed gliptins(or glucagon like peptide-1 receptor agonists) may show enhanced blood-brain barrier crossing and increased glucagon like peptide-1 levels in the brain after direct crossing of the drug for the olfactory region, targeting the cerebrospinal fluid. Further blood-brain barrier crossing tests may extend dipeptidyl peptidase-4 inhibitors' effects beyond the anti-hyperglycemic control to intranasal spray, intranasal powder, or drops targeting the blood-brain barrier and neurodegenerative diseases with the most suitable formula. Moreover, novel nano-formulation is encouraged either to obtain favorable pharmacokinetic parameters or to achieve promising blood-brain barrier penetration directly through the olfactory region. Many surfactants should be investigated either as a solubilizing agent for hydrophobic drugs or as penetration enhancers. Different formulae based on in vitro and in vivo characterizations, working on sister gliptins(or glucagon like peptide-1 receptor agonists), different routes of administration, pharmacokinetic studies, dose response relationship studies, monitoring of plasma/brain concentration ratio after single and multiple dose, and neurodegenerative disease animal models are required to prove the new method of use(utility) for dipeptidyl peptidase-4 inhibitors as potential neuroprotective agents. Furthermore, investigations of glucagon like peptide-1 receptor agonists' neuroprotective effects on animal models will be considered carefully because they crossed the blood-brain barrier in previous studies, enabling their direct action on the central nervous system. Combination therapy of dipeptidyl peptidase-4 inhibitors or glucagon like peptide-1 receptor agonists with already marketed drugs for neurodegenerative disease should be considered, especially regarding the novel intranasal route of administration.

MK-0626,a selective DPP-4 inhibitor,attenuates hepatic steatosis in ob/ob mice

AIM:To investigate the mechanism and in vivo effects of MK-0626,a dipeptidyl peptidase-4 inhibitor,on hepatic steatosis using ob/ob mice.METHODS:We analyzed obese(ob/ob)8-wk-old male mice that had been randomly divided into two groups of ob/ob mice(n=16 each)and were treated with1.5 or 3 mg/kg MK-0626 and two control groups of untreated ob/ob mice and lean littermates(n=16 each).All mice were fed a normal chow diet with or without MK-0626 for either four or eight weeks.Blood samples were collected,and total hepatectomy was performed.RESULTS:The administration of dietary MK-0626 ameliorated the hepatic lipid accumulation in ob/ob micetreated with 3 mg/kg MK-0626(3 MK),P<0.05,vs untreated ob/ob mice(ob/ob).The MK-0626 treatment reduced the serum alanine aminotransferase levels(both treatment groups,P<0.05 vs ob/ob)and glucoses/insulin levels/calculated HOMA scores(1.5 MK,P<0.05vs ob/ob;3 MK,P<0.01 vs ob/ob)and increased the serum adiponectin levels(3 MK,P<0.05 vs ob/ob)in a dose-dependent manner.The MK-0626 treatment increased the m RNA expression of peroxisome proliferator-activated receptorα/microsomal triglyceride transfer protein(1.5 MK,P<0.05 vs ob/ob;3 MK,P<0.01vs ob/ob)but reduced the sterol regulatory element binding transcription factor-1c/fatty acid synthase/stearoyl-Co A desaturase-1(both treatment groups,P<0.01 vs ob/ob).The MK-0626 treatment increased the activity of AMP-activated protein kinase(AMPK)(both treatment groups,P<0.01 vs ob/ob).CONCLUSION:MK-0626 could attenuate hepatic steatosis through enhancing AMPK activity,inhibiting hepatic lipogenic gene expression,enhancing triglyceride secretion from liver and increasing serum adiponectin levels.

Treatment of type 2 diabetes, lifestyle, GLP1 agonists and DPP4 inhibitors

In recent years the treatment focus for type 2 diabetes has shifted to prevention by lifestyle change and to more aggressive reduction of blood sugars during the early stage of treatment. Weight reduction is an important goal for many people with type 2 diabetes.Bariatric surgery is no longer considered a last resort treatment. Glucagon-like peptide-1 agonists given by injection are emerging as a useful treatment since they not only lower blood sugar but are associated with a modest weight reduction. The role of the oral dipeptidyl peptidase 4 inhibitors is emerging as second line treatment ahead of sulphonylureas due to a possible beneficial effect on the beta cell and weight neutrality.Drugs which inhibit glucose re-absorption in the kidney,sodium/glucose co-transport 2 inhibitors, may have a role in the treatment of diabetes. Insulin treatment still remains the cornerstone of treatment in many patients with type 2 diabetes.

Drug repurposing of histone deacetylase inhibitors that alleviate neutrophilic inflammation in acute lung injury and idiopathic pulmonary fibrosis via inhibiting leukotriene a4 hydrolase and blocking LTB4 biosynthesis

OBJECTIVE Leukotriene B4(LTB4)biosynthesis and subsequently neutrophilic inflammation may provide a potential strategy for the treatment of acute lung injury(ALI)or idiopathic pulmonary fibrosis(IPF).To provide a potential strategy for the treatment of ALI or IPF,we identified potent inhibitors of Leukotriene A4 hydrolase(LTA4H),a key enzyme in the biosynthesis of LTB4.METHODS In this study,we identified two known histone deacetylase(HDAC)inhibitors,suberanilohydroxamic acid(SAHA)and its analogue 4-(dimethylamino)-N-[7-(hydroxyamino)-7-oxoheptyl]benzamide(M344),as effective inhibitors of LTA4H using enzymatic assay,thermofluor assay,and X-ray crystallographic investigation.We next tested the effect of SAHA and M344 on endogenous LTB4 biosynthesis in neutrophils by ELISA and neutrophil migration by transwell migration assay.A murine experimental model of ALI was induced by lipopolysaccharide(LPS)inhalation.Histopathological analysis of lung tissue using H&E staining revealed the serious pulmonary damage caused by LPS treatment and the effect of the SAHA.We next examined m RNA and protein levels of pro-inflammatory cytokines in lung tissue and bronchoalveolar lavage fluid using q RT-PCR and ELISA to further investigate the underlying mechanisms of anti-inflammatory activities by SAHA.We also investigated the effects of SAHA and M344 on a murine experimental model of bleomycin(BLM)-induced IPF model.RESULTS The results of enzymatic assay and X-ray crystallography showed that both SAHA and M344 bind to LTA4H,significantly decrease LTB4 levels in neutrophil,and markedly diminish early neutrophilic inflammation in mouse models of ALI and IPF under a clinical safety dose.CONCLUSION Collectively,SAHA and M344 would provide promising agents with well-known clinical safety for potential treatment in patients with ALI and IPF via pharmacologically inhibiting LAT4H and blocking LTB4 biosynthesis.

Synthesis of 5-substituted benzyl-2,4-diamino pyrimidine derivatives as c-Fms kinase inhibitors

A serials of novel 5-substituted benzyl-2,4-diamino pyrimidine derivatives have been synthesized and evaluated as inhibitors of c-Fms kinase by the standard MTT method.The results showed that compound 15,5-[3-methoxy-4-（pyridine-3-yl）benzyl]-2,4-diamino pyrimidine,had an IC50 of 1.45μmol/L in inhibiting the proliferation of M-CSF-dependent myeloid leukemia cells in mice （NFS-60）,which was similar with GW2580,a selective inhibitor of c-Fms kinase.