TWI633116B - 降低血糖之化合物 - Google Patents
降低血糖之化合物 Download PDFInfo
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- TWI633116B TWI633116B TW106104216A TW106104216A TWI633116B TW I633116 B TWI633116 B TW I633116B TW 106104216 A TW106104216 A TW 106104216A TW 106104216 A TW106104216 A TW 106104216A TW I633116 B TWI633116 B TW I633116B
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- chain
- cysteine
- compound
- insulin
- seq
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Classifications
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- C—CHEMISTRY; METALLURGY
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- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/705—Receptors; Cell surface antigens; Cell surface determinants
- C07K14/72—Receptors; Cell surface antigens; Cell surface determinants for hormones
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- A—HUMAN NECESSITIES
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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- A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- A61K38/17—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- A61K38/177—Receptors; Cell surface antigens; Cell surface determinants
- A61K38/179—Receptors; Cell surface antigens; Cell surface determinants for growth factors; for growth regulators
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- A—HUMAN NECESSITIES
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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Abstract
本發明係關於醫學領域及該領域內糖尿病或高血糖症之治療。更特定而言,本發明係關於一種降低血糖之化合物、含有此類化合物之醫藥組合物及此類化合物之治療用途。
Description
本發明係關於醫學領域。更特定而言,本發明屬於糖尿病及高血糖症之治療的領域。本發明係關於一種降低血糖之化合物、含有此類化合物之醫藥組合物及此類化合物之治療用途。
用於糖尿病患者的胰島素替代療法理想地儘可能接近地與在健康個體中的內源性胰島素分泌模式類似。對胰島素的生理要求可分為兩個階段:(a)需要胰島素脈衝以處理膳食-相關的血糖起伏的營養吸收階段,亦稱為「餐時」胰島素,及(b)需要持續輸送胰島素以調節肝葡糖輸出用於保持最佳禁食血糖的吸收後階段,亦稱為「基礎」胰島素。 對患有糖尿病的人的有效的胰島素療法通常涉及兩類外源性胰島素調配物之組合使用:進餐時間的速效餐時胰島素,及每日投與一次或兩次以控制進餐之間的血糖含量的更長效的基礎胰島素。胰島素治療的一個目標為儘可能接近地模擬內源性胰島素分泌及活動之正常模式而不引起低血糖。可能需要模擬的內源性胰島素之特徵包括用於人類胰島素受體的結合親和力,經人類IGF-1受體結合於人類胰島素受體的優先結合,人類胰島素受體之磷酸化,及血液中的葡萄糖降低。外源性胰島素之另一所需特性可能為模擬在肝臟及周邊組織中內源性胰島素之活動。 所需外源性基礎胰島素亦應提供延長的且「平緩的」時間作用,即,其將控制血糖含量至少12小時,且較佳地24小時或更久,而不會有顯著的低血糖之風險。一些基礎胰島素具有24小時或更久的作用持續時間,但具有更長作用持續時間之胰島素可輔助更多患者實現更好的血糖控制。具延長的作用持續時間(諸如大於24小時之時間段)的化合物,可降低夜間低血糖的風險且允許每日給藥次數存在較大變化而不增加患者的低血糖之風險。WO13130683大體描述經使用蛋白質結合物而延長肽之半衰期。 需要一種具延長且平緩的作用持續時間特徵曲線的新穎且改良之基礎胰島素化合物,以治療有需要之患者的糖尿病及高血糖症。
本發明之化合物包含提供延長且平緩的時間作用且已顯示控制血糖含量高達72小時的胰島素化合物。本發明之胰島素化合物預計具有關於每日給藥的平緩的藥物動力學特徵曲線,其在其延長的作用持續時間期間具較低波峰-波谷比。在一實施例中,本發明提供適用於在有需要之患者中治療糖尿病、降低血紅素A1c及降低血糖含量的化合物。本發明之化合物顯示葡萄糖降低高達89%且作用持續時間高達72小時。 本發明提供一種包含A鏈及B鏈的胰島素化合物,其中A鏈之胺基酸序列為SEQ ID NO: 1且B鏈之胺基酸序列為SEQ ID NO: 2,且其中A鏈及B鏈含有在A鏈位置7處之半胱胺酸與B鏈位置7處之半胱胺酸之間的二硫鍵,在A鏈位置20處之半胱胺酸與B鏈位置19處之半胱胺酸之間的二硫鍵,及在A鏈位置6處之半胱胺酸與A鏈位置11處之半胱胺酸之間的二硫鍵。本發明之化合物在本文中可稱作化合物330。 本發明亦提供一種醫藥組合物,其包含包括A鏈及B鏈之化合物,其中A鏈之胺基酸序列為SEQ ID NO: 1且B鏈之胺基酸序列為SEQ ID NO: 2,且其中A鏈及B鏈含有在A鏈位置7處之半胱胺酸與B鏈位置7處之半胱胺酸之間的二硫鍵,在A鏈位置20處之半胱胺酸與B鏈位置19處之半胱胺酸之間的二硫鍵,及在A鏈位置6處之半胱胺酸與A鏈位置11處之半胱胺酸之間的二硫鍵,及一或多種醫藥學上可接受的賦形劑。 本發明進一步提供一種治療患者之糖尿病或高血糖症之方法,其包含向有需要之患者投與有效量的包含A鏈及B鏈之化合物,其中A鏈之胺基酸序列為SEQ ID NO: 1且B鏈之胺基酸序列為SEQ ID NO: 2,且其中A鏈及B鏈含有在A鏈位置7處之半胱胺酸與B鏈位置7處之半胱胺酸之間的二硫鍵,在A鏈位置20處之半胱胺酸與B鏈位置19處之半胱胺酸之間的二硫鍵,及在A鏈位置6處之半胱胺酸與A鏈位置11處之半胱胺酸之間的二硫鍵。在另一實施例中,本發明提供一種治療患者之糖尿病或高血糖症之方法,其包含向有需要之患者投與有效量的醫藥組合物,其包含包括A鏈及B鏈之化合物,其中A鏈之胺基酸序列為SEQ ID NO: 1且B鏈之胺基酸序列為SEQ ID NO: 2,且其中A鏈及B鏈含有在A鏈位置7處之半胱胺酸與B鏈位置7處之半胱胺酸之間的二硫鍵,在A鏈位置20處之半胱胺酸與B鏈位置19處之半胱胺酸之間的二硫鍵,及在A鏈位置6處之半胱胺酸與A鏈位置11處之半胱胺酸之間的二硫鍵,及一或多種醫藥學上可接受的賦形劑。 本發明提供一種用於治療的化合物,其包含A鏈及B鏈,其中A鏈之胺基酸序列為SEQ ID NO: 1且B鏈之胺基酸序列為SEQ ID NO: 2,且其中A鏈及B鏈含有在A鏈位置7處之半胱胺酸與B鏈位置7處之半胱胺酸之間的二硫鍵,在A鏈位置20處之半胱胺酸與B鏈位置19處之半胱胺酸之間的二硫鍵,及在A鏈位置6處之半胱胺酸與A鏈位置11處之半胱胺酸之間的二硫鍵。本發明進一步提供一種用於糖尿病治療中的化合物,其包含A鏈及B鏈,其中A鏈之胺基酸序列為SEQ ID NO: 1且B鏈之胺基酸序列為SEQ ID NO: 2,且其中A鏈及B鏈含有在A鏈位置7處之半胱胺酸與B鏈位置7處之半胱胺酸之間的二硫鍵,在A鏈位置20處之半胱胺酸與B鏈位置19處之半胱胺酸之間的二硫鍵,及在A鏈位置6處之半胱胺酸與A鏈位置11處之半胱胺酸之間的二硫鍵。在另一實施例中,本發明提供一種用於高血糖症治療中的化合物,其包含A鏈及B鏈,其中A鏈之胺基酸序列為SEQ ID NO: 1且B鏈之胺基酸序列為SEQ ID NO: 2,且其中A鏈及B鏈含有在A鏈位置7處之半胱胺酸與B鏈位置7處之半胱胺酸之間的二硫鍵,在A鏈位置20處之半胱胺酸與B鏈位置19處之半胱胺酸之間的二硫鍵,及在A鏈位置6處之半胱胺酸與A鏈位置11處之半胱胺酸之間的二硫鍵。 本發明亦提供包含A鏈及B鏈之化合物用於製造用以治療糖尿病之藥物的用途,其中A鏈之胺基酸序列為SEQ ID NO: 1且B鏈之胺基酸序列為SEQ ID NO: 2,且其中A鏈及B鏈含有在A鏈位置7處之半胱胺酸與B鏈之位置7處之半胱胺酸之間的二硫鍵,在A鏈位置20處之半胱胺酸與B鏈位置19處之半胱胺酸之間的二硫鍵,及在A鏈位置6處之半胱胺酸與A鏈位置11處之半胱胺酸之間的二硫鍵。本發明提供包含A鏈及B鏈之化合物用於製造用以治療高血糖症之藥物的用途,其中A鏈之胺基酸序列為SEQ ID NO: 1且B鏈之胺基酸序列為SEQ ID NO: 2,且其中A鏈及B鏈含有在A鏈位置7處之半胱胺酸與B鏈位置7處之半胱胺酸之間的二硫鍵,在A鏈位置20處之半胱胺酸與B鏈位置19處之半胱胺酸之間的二硫鍵,及在A鏈位置6處之半胱胺酸與A鏈位置11處之半胱胺酸之間的二硫鍵。 如本文所使用之術語「治療(treatment或treating)」係指對患有糖尿病或高血糖症或其他所指胰島素投與以便對抗或緩解彼等病狀之症狀及併發症的病狀的患者之處理及護理。治療包括向有需要之患者投與本發明之化合物或含有化合物之組合物以防止症狀或併發症之發作,緩解症狀或併發症,或消除疾病、病狀或病症。待治療之患者為動物,且較佳為人類。 如本文所使用,術語「有效量」係指在單劑量或多劑量向患者或個體投與時,將引起組織、系統、動物、哺乳動物或人類之生物學或醫學反應或對其產生所需治療效果的本發明之化合物或含有本發明之化合物的醫藥組合物之量或劑量,其中該反應或效果為研究人員、獸醫、醫師或其他臨床醫師所尋求的。劑量可包括較高初始裝載劑量,接著較低劑量。 在本文中可互換使用之術語「患者」及「個體(subject及individual)」係指動物,較佳地該等術語係指人類。在某些實施例中,患者(較佳人類)的特徵進一步為患有將受益於降低血液中葡萄糖含量之疾病或病症或病狀。 包含本發明之化合物的醫藥組合物可向需要此類治療之患者以非經腸投與。非經腸投與可藉助於注射器,視情況使用之筆式注射器或機械驅動注射器,藉由皮下、肌肉內或靜脈內注射執行。或者,非經腸投與可藉助於輸液泵執行。本發明之實施例提供適於向患者投與的醫藥組合物,其包含向有需要之患者投與治療有效量的本發明之化合物及一或多種醫藥學上可接受的賦形劑。此類醫藥組合物可藉由此項技術中熟知的使用醫藥產品的習知賦形劑的各種技術中之任一者製備。(雷明頓藥學大全(Remington's Pharmaceutical Sciences),第21版,費城科學大學(University of the Sciences in Philadelphia),Philadelphia,PA,USA(2006))。 本發明之化合物可藉由熟習此項技術者已知的各種技術製備。化合物可使用重組DNA技術經前驅蛋白質分子製備。包括cDNA及合成DNA之DNA可為雙股或單股。編碼本文所述之前驅蛋白質分子的編碼序列可由於遺傳密碼子之冗餘或簡併而變化。DNA可引入至宿主細胞中以製造本發明之前驅蛋白。宿主細胞可為諸如大腸桿菌之K12或B菌株的細菌細胞,諸如酵母細胞的真菌細胞,或諸如中國倉鼠卵巢(「CHO」)細胞的哺乳動物細胞。 本發明之化合物可經由具有SEQ ID NO: 3之胺基酸序列的前驅蛋白製備。適當宿主細胞經用於製造本發明之前驅蛋白的表現系統暫時或穩定轉染或轉型。表現載體通常在宿主生物體中可作為游離基因體或作為宿主染色體DNA之主要部分複製。通常,表現載體將含有選擇標記,例如四環素、新黴素及二氫葉酸還原酶,以允許選擇經所需DNA序列轉型之彼等細胞。 基於經修飾之pBR322質體的質體可用於表現且自該等質體的表現可由PhoA啟動子誘導。前驅蛋白可包括分泌信號以使其能夠分泌至細胞胞外質內。前驅蛋白可在細胞質、胞外質及胞外生長培養基中之任一者中發生積聚。前驅蛋白摺疊且在摺疊過程期間形成二硫鍵。在醱酵二至四天之後,可自培養基、細胞胞外質及/或總細胞裂解液中獲得前驅蛋白產物。 本發明之化合物可藉由此項技術中已知的多種程序以及下文描述之彼等方法製備。所描述之各途徑之特定合成步驟可以不同方式組合以製備本發明之化合物。
實例 1
化合物330之表現及純化 在來自新英格蘭生物實驗室(New England Biolabs),產品編號C2530H之B菌株大腸桿菌菌株BL21中表現化合物330的前驅蛋白。該前驅蛋白係產自經修飾之pBR322質體,其基因經phoA啟動子調節。典型醱酵作用進行36-72小時,在此期間蛋白質會分泌至培養基中。 藉由用冰醋酸降低pH來調節培養基。在pH為4下,許多污染蛋白質、脂質、細胞殘渣及其他物質會沈澱並藉由離心移除。此經調節之培養基穿過深層過濾器,隨後進行超過濾/透濾作用(「UFDF」)步驟,該步驟係設計用以移除鹽類並將蛋白質交換至5 mM醋酸,10 mM NaCl,pH 4中。前驅蛋白在低pH下在Big Bead Q樹脂上捕獲,該樹脂為具有允許細粒及來自醱酵的其他殘渣通過的大孔徑的陰離子交換劑。洗滌帶電樹脂且藉由鹽梯度溶離出前驅蛋白。 將來自陰離子交換的池經胰蛋白酶及羧基肽酶B處理以移除前驅蛋白之區域,產生雙鏈胰島素。在pH為7.5且15℃下進行斷裂過程持續24小時。反應藉由添加酸使pH降低至4來淬滅。將所得溶液濃縮且藉由TFF透濾至5 mM醋酸,pH 4中。 藉由針對結合化合物之帶正電部分的能力而選用的陽離子交換劑(快流S瓊脂糖(Fast Flow S Sepharose))來捕獲化合物。洗滌帶電樹脂且藉由鹽梯度溶離化合物。來自陽離子交換步驟之池藉由逆相層析法進一步純化。化合物在0.16%磷酸存在下結合於具有10 µm珠粒尺寸的YMC鹼性C8樹脂,且藉由乙腈梯度溶離。藉由隔夜透析步驟,隨後濃縮,且使用旋轉濃縮器進行緩衝液交換以將其置於20 mM Tris、135 mM NaCl,pH 7.5的最終緩衝液中來製備用於儲存的最終池。活體外受體親和力
蛋白質之結合親和力在膜上進行的受體結合分析中測定,該等膜係從以下細胞製備:過度表現人類胰島素受體同功異型物A (hIR-A)的穩定地經轉染293EBNA細胞(表現EBNA-1的293HEK人類胚胎腎細胞)、在C端含有C9抗原決定基標籤的過度表現人類胰島素受體同功異型物B (hIR-B)的穩定地經轉染293HEK細胞,或過度表現人類IGF-1受體(hIGF-1R)的穩定地經轉染293HEK細胞。 受體結合親和力(Ki
)係使用以下自競爭放射性配位體結合分析法測定:使用人類重組(3-[125
I]-碘酪胺醯基-A14)-胰島素(2200 Ci/mmol,用於hIR-A及hIR-B分析)或人類重組[125
I]-胰島素類生長因子-1 (1800至2600 Ci/mmol,用於hIGF-1R分析)(Perkin Elmer Life and Analytical Sciences)。該分析係用閃爍近接分析(scintillation proximity assay;SPA)方法,使用聚乙烯基甲苯(PVT)麥胚凝集素偶合的SPA珠粒(Perkin Elmer Life and Analytical Sciences)進行。SPA分析緩衝液(50 mM Tris-HCl,pH 7.5,150 mM NaCl,0.1%w/v無脂肪酸之BSA)用於所有試劑製備。 使用Freedom/Evo自動機(Tecan)在分析緩衝液中製備測試樣品之連續稀釋液,且用TeMO自動機(Tecan)將50 µL稀釋液添加至96孔白色透明底微定量盤(Corning/Costar) 。使用多分路(Thermo Scientific)儀器添加放射性配位體(50 µL)、膜(50 µL)及SPA珠粒(50 µL)。在室溫下培育10小時之後,使用Microbeta Trilux閃爍計數器(Perkin Elmer Life and Analytical Sciences)測定放射性。 測試樣品之值係以相對於非特異性結合校正之後的未經標記之人類胰島素或IGF-1之活性的百分比計算。IC50
值自4-參數對數非線性回歸分析(XLFit 4.0版,IDBS)測定。必要時,曲線頂部或底部參數分別設定為100或0。親和力常數(Ki
)係根據等式Ki
=IC50
/(1+D/Kd
)從IC50
值計算,其中D等於實驗中所用的放射性配位體之濃度且Kd
等於自飽和結合分析(hIR-A=0.251 nM;hIR-B=0.205 nM;hIGF-1R=0.233 nM)測定的放射性配位體之平衡結合親和力常數。報導之Ki
值顯示為幾何平均值±平均值的標準誤差(SEM),重複測定次數用數字「n」表示(表1)。限定符(>)係指該數據與最大結合相比未達到50%抑制,因此Ki
係使用在分析中測試的化合物之最高濃度計算且不計算標準誤差。 化合物330在hIR-A及hIR-B處皆具有結合親和力且選擇性優於hIGF-1R(表1)。 表1:人類胰島素受體同功異型物A或B (hIR-A或hIR-B)及人類胰島素類生長因子-1受體(hIGF-1R)結合親和力 受體功能活化
藉由hIR-A、hIR-B或hIGF-1R自動磷酸化之ELISA定量測定功能活性。將過度表現hIR-A、hIR-B或hIGF-1R且各自含有C端C9抗原決定基標籤(TETSQVAPA)的穩定地經轉染人類293HEK細胞在37℃下在補充有0.1%溶離份V-無脂肪酸之BSA(Sigma-Aldrich (St.Louis,MO,USA))的無血清培養基(DMEM,具麩醯胺酸的高葡萄糖,10 mM HEPES,pH 7.4,1 mM丙酮酸鈉,0.8 mg/mL遺傳黴素,1%青黴素/鏈黴素)中用3倍連續稀釋的測試化合物處理1小時。細胞用冰冷之PBS沖洗且用冰冷的NP40緩衝液[1% NP-40 (IGEPAL CA-630),150 mM NaCl,50 mM TRIS,pH 7.4,2 mM釩酸鹽及cOmplete™蛋白酶抑制劑]溶解細胞。 使用夾層ELISA藉由用抗C9單株抗體(RHO 1D4抗體,英國哥倫比亞大學(University of British Columbia))捕獲且用抗磷酸酪胺酸單株4G10®-辣根過氧化酶(4G10®-HRP)結合物(EMD Millipore,Billerica,MA,USA)及3,3,5,5-四甲基聯苯胺(TMB) Pierce HRP受質(Thermo Scientific,Rockford,IL,USA)偵測來測定酪胺酸磷酸化。使用PerkinElmer Envision盤讀取器在450 nm處記錄吸光度。吸光度值經用人類胰島素(100 nM,用於hIR-A及hIR-B分析)或10 nM IGF-1(用於hIGF-1R分析)處理的對照細胞之最大反應來正規化。使用4-參數(曲線最大、曲線最小、EC50、希爾斜率)對數(S形)非線性回歸常式(XLFit 4.0版:活性基底,IDBS)分析資料。功能效能作為引發半最大反應的濃度(EC50)報告,其值顯示為幾何平均值±平均值的標準誤差(SEM),重複測定次數用「n」表示。 化合物330係針對hIR-A及hIR-B的促效劑且與hIGF-1R相比對胰島素受體具有選擇性(表2)。 表2:293細胞中之人類胰島素受體(hIR-A及hIR-B)及人類胰島素類生長因子-1受體(hIGF-1R)磷酸化
1型糖尿病之大鼠模型中的活體內效能之評估 在鏈佐黴素(STZ)-處理的大鼠糖尿病模型中研究化合物330之效果。雄性史泊格多利(Sprague-Dawley)大鼠,體重400至425公克,獲自Harlan實驗室,Indianapolis,IN。在環境適應約一週後,將大鼠用異氟醚麻醉且給予單次注射鏈佐黴素(Zanosar®,項目號89256,Teva非經腸藥品,40 mg/kg IV)。該等大鼠在注射鏈佐黴素三天後用於研究中;僅將非禁食血糖在400至550 mg/dl之間的動物用於此等研究中。 將大鼠分組以提供在血糖及體重上的相當之差異;使用區塊隨機分配工具將大鼠隨機化。使用Accucheck Aviva血糖儀(Roche)量測血糖。向經STZ處理的大鼠給予單次皮下(SC)注射化合物330或媒劑無菌標準生理鹽水(0.9w/v%氯化鈉溶液)。藉由尾部採血來採集用於葡萄糖量測的血液樣品。在整個實驗中,該等動物可自由獲取食物及水。來自此等研究的血漿樣品用於化合物含量之分析。 在經(STZ)處理的大鼠中在30 nmol/kg、100 nmol/kg、300 nmol/kg三個劑量水準下量測化合物330的血糖含量。在注射後0,0.5,1,2,4,6,8,10,12,24,36,48,72及96小時量測血糖。顯示資料為平均值±(標準誤差平均值)SEM(n=5)。使用JMP軟體進行統計分析,且將處理組與媒劑對照組進行比較(*P<0.05)。 100 nmol/kg劑量的化合物330在8小時顯示的葡萄糖降低超過對照組高達76%,300 nmol/kg劑量的化合物330在24小時顯示降低超過對照組高達89% (表3)。 表3:在投與化合物330之後隨時間變化的血糖含量(mg/dL) 序列
多肽序列(SEQ ID NO: 1)多肽序列(SEQ ID NO: 2)多肽序列(SEQ ID NO: 3)
Claims (9)
- 一種包含A鏈及B鏈之化合物,其中該A鏈之胺基酸序列為SEQ ID NO: 1且該B鏈之胺基酸序列為SEQ ID NO: 2,且其中該A鏈及該B鏈含有以下:在該A鏈位置7處之半胱胺酸與該B鏈位置7處之半胱胺酸之間的二硫鍵,在該A鏈位置20處之半胱胺酸與該B鏈位置19處之半胱胺酸之間的二硫鍵,及在該A鏈位置6處之半胱胺酸與該A鏈位置11處之半胱胺酸之間的二硫鍵。
- 一種醫藥組合物,其包含如請求項1之化合物及一或多種醫藥學上可接受的賦形劑。
- 一種如請求項2之組合物的用途,其用於製造治療糖尿病之藥物。
- 一種如請求項2之組合物的用途,其用於製造治療高血糖症之藥物。
- 如請求項1之化合物,其用於治療。
- 如請求項1之化合物,其用於治療糖尿病。
- 如請求項1之化合物,其用於治療高血糖症。
- 一種如請求項1之化合物的用途,其用於製造用以治療糖尿病之藥物。
- 一種如請求項1之化合物的用途,其用於製造用以治療高血糖症之藥物。
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