TWI715611B - 抗體藥物偶聯物的共價鍵連接子及其製備方法與應用 - Google Patents
抗體藥物偶聯物的共價鍵連接子及其製備方法與應用 Download PDFInfo
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- TWI715611B TWI715611B TW105126166A TW105126166A TWI715611B TW I715611 B TWI715611 B TW I715611B TW 105126166 A TW105126166 A TW 105126166A TW 105126166 A TW105126166 A TW 105126166A TW I715611 B TWI715611 B TW I715611B
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Abstract
本發明提供具有能夠共價偶合抗體之一或多個游離巰基的連接子的新穎且具有優勢之組合物。具體言之,本發明提供如用在抗體-藥物偶聯物(ADC)中的分子結構、合成路徑、偶合機制、及其應用。
Description
本申請要求美國臨時申請序號62/205121的專利權益,其於2016年8月14日提交,在此通過引用全部併入本文,包括任何附圖,表格和繪圖。
抗體藥物偶聯物(ADC)是一類快速發展的靶向治療新藥物,具有高抗癌藥物選擇性和細胞毒活性等優點。在美國,已被批准ADC藥物brentuximab vedotin(ADCETRIS®),是把抗-CD30抗體與甲基阿裡他汀E進行偶聯,用於治療間變性大細胞淋巴瘤和霍奇金淋巴瘤。
抗體一般具有4個鏈間二硫鍵(2個位於重鏈之間,另外2個位於重鏈與輕鏈之間),二硫蘇糖醇、三(2-羧乙基)膦等還原劑可以將鏈間二硫鍵進行還原,得到8個可用於偶聯的活性巰基基團。常規抗體藥物偶聯是先斷裂鏈間二硫鍵,然後連接子與抗體上的巰基官能團進行部份連接,此常規偶聯因破壞了抗體結構,導致抗體藥物偶聯物(ADC)穩定性降低,半衰期縮短。
橋接偶聯是ADC設計和合成的一種最新成果,採用了一種不同的方法即:通過鏈接子與兩個巰基同時相連,在抗體的兩個重鏈之間以及在重鏈和輕鏈之間構建新橋鍵,增加了抗體藥物偶聯物的穩定性和均一性。
該領域先前的研究是利用雙馬來醯亞胺與二硫鍵斷裂產生的兩個巰基進行反應。馬來醯亞胺和巰基之間的共價鍵連接過程是一個典型的烯烴轉化反應。最近的巰基橋接反應的研究也是基於這個原理,包括馬來醯亞胺、雙馬來醯亞胺和鹵素取代的馬來醯亞胺。但是,迄今為止,巰基橋接的範圍僅限於馬來醯亞胺及其衍生物,通常沒有描述用於製備腫瘤靶向的ADC。例如,先前,用馬來醯亞胺及其衍生物與巰基進行共價鍵偶聯的方法,並不包括把它們用於偶聯活性化合物,如腫瘤靶向藥物分子、蛋白質或多肽(見,例如,PCT專利申請公開號WO2013132268)。詳細描述把馬來醯亞胺及其衍生物用於ADCs的其它方法,沒有應用共價鍵橋接偶聯機理,即一個連接子先後與2個巰基進行反應,如此發明所描述(見,例如,中國專利申請公開號CN103933575)。
本發明提供了用於偶聯抗體與其它化合物的有優勢的新型連接子。在本發明中,描述了此連接子的結構、合成和應用,除此之外,此發明還提供了抗體/活性化合物偶聯物及其應用,例如,在抗體藥物偶聯物中的應用。
部分實施例子提供了連接子-活性化合物,其結構為通式I:
或其藥學上可接受的鹽,其中:R1和R2是能和巰基反應的官能團;L1、L2、L是連接子或者為空;
M是連接基團;Q是活性化合物或者為空;m是從0到6的整數;n是從0到8的整數。
部分實施例子提供了靶標部分和連接子活性化合物偶聯物,其結構為通式II:
或其藥學上可接受的鹽,A是靶標部分;L1、L2、L是連接子或者為空;M是連接基團;Q是活性化合物或者為空;m是從0到6的整數;n是從0到8的整數。
這裡用到的“空”是指無任何結構。
圖1是抗體的二硫鍵裂解後或者被還原後產生的2個相鄰巰基與連接子反應構建的共價硫橋的簡圖。
圖2是抗-Her-2單克隆抗體與由Mc-VC-PAB-MMAE製備的細胞毒素進行偶聯得到的抗-Her-2 ADC的SDS-PAGE圖。
圖3是MSL-C31的HIC-HPLC色譜圖。
圖4是MSL-C75的還原膠SDS-PAGE結果。
圖5是MSL-C75的HIC-HPLC色譜圖。
圖6是還原膠SDS-PAGE結果a)裸抗,b)CD59-C78。
圖7是CD59-C78的HIC-HPLC色譜圖。
在接下來的詳細描述中,參考資料包括所附圖表,描繪了本發明的示例、非受限的和非詳盡的實施例子。這些實施例子描述的足夠詳細,在本領域的專業人員能夠實踐此發明。在不超出本發明的精神或範圍的前提下,可以用到其它的實施例子或進行其它的改變。因此,本發明並不局限於接下來的詳細說明,本發明的範圍由後面附加的申請專利範圍所定義。所有的專利、專利申請、臨時申請、以及本文參考或引用的出版物被全部納入參考,包括所有的圖和表,在某種程度上,它們不與本文的明確說明不一致。
本發明提供了具有優勢的新型連接子,其通過一端能夠共價偶聯2個自由巰基,通過另一端連接一個活性化合物。本發明也提供了抗體活性化合物偶聯物,例如抗體藥物偶聯物(ADCs)。在部分實施例子中,本發明描述的ADCs包括以抗癌藥作為活性化合物的情況。
定義
本發明中的術語“活性化合物”包括任何天然的或者合成的物質,當其給動物使用時具有生理作用。根據本發明,活性化合物可用於治療,例如,恒溫動物,特別是哺乳動物,包括人類、獸醫動物和養殖動物。活性化合物可作用於或顯示,動物體內(或上)所需的目標,包括腫瘤組織。
“活性化合物”包括但不限於:在突觸部位和神經連接點起作用的藥物;催眠藥和鎮靜藥;治療精神疾病,如抑鬱症和精神分裂症,的藥物;抗癲癇和抗驚厥藥;治療帕金森氏病和亨廷頓舞蹈病、老化和阿爾茨海默病的藥物;興奮性氨基酸拮抗劑、神經營養因數和神經再生劑;營養因數;治療中樞神經系統(CNS)外傷或者中風的藥物;治療成癮和藥物濫用的藥物;治療細菌、病毒和/或微生物感染的藥物,如流感、愛滋病、皰疹、水痘等;自體有效物質和抗炎藥物;治療寄生蟲感染和微生物引起的疾病的化療藥物;免疫抑制劑;抗腫瘤藥物;激素和激素拮抗劑;重金屬和重金屬拮抗劑;非金屬毒素拮抗劑;細胞抑制劑;顯示劑和其它診斷物質;免疫活性劑和免疫反應劑;傳導媒介和它們各自的受體激發劑和受體拮抗劑,以及它們各自的前體和代謝物;轉運蛋白抑制劑;抗生素;解痙藥;抗組胺藥;止嘔藥;弛緩劑;興奮劑;正義寡核苷酸和反義寡核苷酸;腦擴張器;精神藥物;抗躁狂藥;血管擴張器和壓縮器;抗高血壓藥;治療偏頭痛的藥物;升血糖劑和降血糖劑;礦物質和營養劑;抗肥胖藥物;促
蛋白合成類固醇;抗哮喘藥;以及它們的混合物。
本發明中的術語“抗體”也被稱為免疫球蛋白,是一個大的Y型蛋白質,用於免疫系統識別和抵抗細菌和病毒等外來實體。抗體具有四條多肽鏈,兩條相同的重鏈和兩個相同的輕鏈,它們之間由半胱氨酸二硫鍵連接。
本發明中的術語“單克隆抗體”是一種單特異性抗體,是由同一免疫細胞生成,且為唯一的親本細胞的克隆產物,所以所有的抗體分子是相同的。單克隆抗體可以通過融合骨髓瘤細胞和已經與所需抗原發生免疫的鼠的脾細胞(或兔的B細胞)來製備,然後通過例如親和純化等技術來純化所得的雜交瘤。重組單克隆抗體可以使用包括全克隆或噬菌體展示/酵母展示等技術,不通過小鼠而在病毒或酵母細胞中製備。通過免疫球蛋白基因片段的克隆來創建氨基酸序列稍微不同的抗體庫,從而獲得具有所需特異性的抗體。相應的抗體可通過發酵進行大規模製備。
本發明中的術語“嵌合”或“人源化”抗體是在重組過程中由初始抗體(通常是鼠)與人類DNA序列嵌合而成。鼠的DNA編碼單克隆抗體的v區部分,與人的c區部分合併,得到部分鼠源部分人源的單克隆抗體。全人源化抗體是使用轉基因小鼠(工程化以產生人抗體)或噬菌體展示庫來製備的。
本發明中的術語“連接子”具有兩個反應性末端,一端用於與生物部分或其片段,例如抗體或其片段,進行鍵合或組合,另一端用於偶聯細胞毒素等活性化合物。
本發明中的術語“細胞毒素”是個實體,與細胞在一起時,比如腫瘤細胞,對細胞有毒或者誘導細胞關鍵功能的改變。
本發明中的術語“烷基”表示直鏈或者支鏈的飽和碳氫化合物(即,不包含雙鍵或三鍵)。烷基基團可以帶有1到9個碳原子(當其在本
發明中出現時,“1到9”的數值範圍表示此範圍中的任意一個整數,例如,“1到9個碳原子”表示此烷基基團可以包含1個碳原子、2個碳原子、3個碳原子等,一直到9個碳原子。同時,此烷基的定義也包括無指定鏈長度的端烷基)。烷基基團可以是包含1到9個碳原子的中等尺寸烷基。典型的烷基基團包括但不限於:甲基、乙基、丙基、異丙基、丁基、異丁基、叔丁基、戊基、己基等。
本發明中的術語“烯基”表示包含一個或多個雙鍵的直鏈或者支鏈的碳氫化合物。烯基基團可以帶有2到9個碳原子,也包括無指定鏈長度的端烯基。烯基基團可以是包含2到9個碳原子的中等尺寸烯基。烯基基團也可以是包含2到4個碳原子的小尺寸的烯基。烯基基團可以被設計為“C2-4烯基”或者類似設計。僅僅是舉個例子,“C2-4烯基”表示在烯基鏈中有2到4個碳原子,即,烯基鏈的選擇範圍如下:乙烯基、丙烯-1-基、丙烯-2-基、丙烯-3-基、丁烯-1-基、丁烯-2-基、丁烯-3-基、丁烯-4-基、1-甲基-丙烯-1-基、2-甲基-丙烯-1-基、1-乙基-乙烯-1-基、2-甲基-丙烯-3-基、丁-1,3-二烯基、丁-1,2-二烯基、丁-1,2-二烯基-4-基。典型的烯基包括,但不限於:乙烯基、丙烯基、丁烯基、戊烯基和己烯基等。
本發明中的術語“炔基”表示包含一個或多個三鍵的直鏈或者支鏈的碳氫化合物。炔基基團可以帶有2到9個碳原子,也包括無指定鏈長度的端炔基。炔基基團可以是包含2到9個碳原子的中等尺寸炔基。炔基基團也可以是包含2到4個碳原子的小尺寸的炔基。炔基基團可以被設計為“C2-4炔基”或者類似設計。僅僅是舉個例子,“C2-4炔基”表示在炔基鏈中有2到4個碳原子,即,炔基鏈的選擇範圍如下:乙炔基、丙炔-1-基、丙炔-2-基、丁炔-1-基、丁炔-2-基、丁炔-3-基和2-丁炔基。典型的炔基包括,但不限於:乙炔基、丙炔基、丁炔基、戊炔基和己炔基等。
本發明中的術語“芳基”表示具有共軛π電子系統的環或環系統,並且包括碳環芳基(例如苯基)和雜環芳基(例如,吡啶)。該術語包括單環或多個稠環(即,共用相鄰的一對原子的環)基團,只要整個環系統是芳香性的。
本發明中的“環烷基”表示完全飽和的碳環或環體系。實例包括,但不限於,環丙基、環丁基、環戊基、環己基。
本發明中的“雜芳基”表示芳香環或環體系(即,共用兩個相鄰原子的兩個或多個稠環)包含一個或多個雜原子,即在環骨架上除碳外,包括但不限於,氮、氧、硫等元素。當雜芳基是一個環系統時,系統中的每個環都是芳香性的。雜芳基可具有5-18個環上原子(即,構成環骨架的原子數,包括碳原子和雜原子的數目),也包括無指定環大小的雜芳基。雜芳基的實例包括,但不限於,呋喃基、噻吩基、酞嗪基、吡咯基、惡唑基、噻唑基、咪唑基、吡唑基、異惡唑基、異噻唑、三唑、噻二唑基、吡啶基、噠嗪基、嘧啶基、吡嗪基、三嗪基、喹啉基、異喹啉基、苯並咪唑基、苯並惡唑基、苯並噻唑基、吲哚基、異吲哚基、和苯並噻吩基。
本發明中的“雜環基”是指在非芳香環或環體系的骨架中含有至少一個雜原子。雜環基可以以稠環、橋環或螺環的方式進行連接。雜環基的環體系中至少有一個環是非芳香性的,其可具有任意的飽和度。所述的雜原子可位於該環體系的非芳香環或芳香環上。所述雜環基可具有3至20個環上原子(即,構成環骨架的原子數,包括碳原子和雜原子的數目),也包括無指定環大小的雜環基。雜環基團可以是包含3到10個環上原子的中等尺寸雜環基。雜環基團也可以是包含3到6個環上原子的小尺寸雜環基。雜環基環的實例包括,但不限於,氮雜基、吖啶基、哢唑基、噌啉基、二氧戊環基、咪唑啉基、咪唑烷基、嗎啉基、環氧乙烷基、環氧己烷、噻庚烷、呱啶基、呱嗪基、二氧代呱
嗪、吡咯烷基、吡咯烷酮基、吡咯烷二酮基、4-呱啶酮基、吡唑啉基、吡唑烷基、1,3-二氧雜環己烯基、1,3-二氧六環基、1,4-二氧雜環己烯、1,4-二氧六環基、1,3-氧硫雜環己基、1,4-氧硫雜環己基、1,4-氧硫雜環己烯基、2H-1,2-惡嗪基、三氧雜環已基、六氫-1,3,5-三嗪基、1,3-二氧雜環戊烯、1,3-二氧戊環基、1,3-二硫戊環基、異惡唑啉基、異惡唑烷基、惡唑啉基、惡唑烷基、惡唑烷酮基、噻唑啉基、噻唑烷基、1,3-惡噻烷基、二氫吲哚基、異二氫吲哚基、四氫呋喃基、四氫吡喃基、四氫噻吩基、四氫噻喃基、四氫-1,4-噻嗪基、硫代嗎啉基、二氫苯並呋喃基、咪唑烷基和四氫喹啉。
本發明中的“雜環基烷基”是指雜環基作為取代基通過亞烷基與其它基團相連。例子包括,但不限於,咪唑啉甲基、咪唑啉甲基和二氫吲哚基乙基。
連接子/活性化合物
一方面,本發明提供了連接子-活性化合物,其結構為通式I:
或者其藥學上可接受的鹽,其中:L1、L2、L是連接子,或者為空;M是一個連接基團;Q是活性化合物,或者為空;m是0至6的整數;n是0至8的整數;每個R1和R2均是可以與巰基反應的官能團。
在一些實施例子中,這兩個能與巰基反應的官能團中的任何一個都可以獨立地包括馬來醯亞胺、鹵素、鹵素取代的官能團、鏈烷基醛、鏈烷基酮、磺醯基烯、矽、異氰酸酯或降冰片烯,但是這兩個官能團不能同時是馬來醯亞胺,也不能同時是鹵素。
其中,在這個實施例子中,R5、R6和R7可任意選擇於H、鹵素、C1-C6烷基、C2-C6烯基、C2-C6炔基、芳基、雜芳基、C3-C9環烷基、C3-C9雜環基、聚乙二醇、NO2、CN、SCN、OR8、SR9、NR10R11、C(=O)R12、C(=O)OR8、C(=O)NR10R11、C(=S)OR8、C(=S)NR10R11、C(=S)SR9、NR10(C=O)R12、NR10(C=S)NR10R11、O(C=O)NR10R11、SO2R9、S(=O)2OR8以及它們的組合,其中R8、R9、R10、R11、R12可任意選擇於H、C1-C6烷基、C2-C6烯基、C2-C6炔基或它們的組合。
X是鹵素,在一些實施例子中,X可以是F、Cl、Br或I;R1和R2可以是不同的,也可以是相同的。
在一些實施例子中,M可以任意選擇於C-R5、N、B、P、Si-R5、芳基、雜芳基、環烷基、和雜環基烷基,其中,R5可以任意選擇於H、C1-C6烷基、C2-C6烯基、C2-C6炔基。
在一些實施例子中,Q是活性化合物,選自微管蛋白結合劑、DNA烷化劑、DNA嵌入劑、酶抑制劑、免疫調節劑、肽類以及核苷酸等。
在一些實施例子中,Q選自美登素、耳他汀、刺孢黴素、阿黴素、倍癌黴素以及吡咯並苯並二唑(PBD)。
在特定實施例子中,Q選自MMAE、MMAF、PBD二聚體、DM1、DM4。Q可以在專利WO2013085925A1包含的活性化合物中任意選擇,並且通過引用全部併入本專利。這裡用到的“Drug”(“藥物”)和“active agent”(“活性化合物”)是等同的。
在一些實施例子中,每個內部連接部分L1和L2可任意選擇於C1-C6烷基、C2-C6烯基、C2-C6炔基、芳基、雜芳基、C3-C9環烷基、C3-C9雜環基、聚乙二醇、O、S、NR6、C(=O)、C(=O)O、C(=O)NR6、C=NR6、C(=S)O、C(=S)NR6、C(=S)S、NR6(C=O)、NR6(C=S)NR7、O(C=O)NR6、S(=O)2以及它們的任意組合;其中,R6和R7可任意選擇於H、C1-C6烷基、C2-C6烯基、C2-C6炔
基。
L表示連接子,連接毒素Q至連接基團M。在一些實施例子中,L包括不可裂解的單元,但在其它實施例子中,L包括可裂解單元。抗體藥物偶聯物可具有1個連接子、2個連接子、3個連接子、4個連接子、5個連接子或6個連接子。
在一些實施例子中,L可任意選擇於以下結構:C1-C9烷基、C2-C9烯基、C2-C9炔基、芳基、雜芳基、C3-C9環烷基、C3-C9雜環基、聚乙二醇、O、S、NR8、C(=O)、C(=O)O、C(=O)NR8、C=NR8、C(=S)O、C(=S)NR8、C(=S)S、NR8(C=O)、NR8(C=S)NR9、O(C=O)NR8、S(=O)2、Val-Cit-PAB、Val-Ala-PAB、Val-Lys(Ac)-PAB、Phe-Lys-PAB、Phe-Lys(Ac)-PAB、D-Val-Leu-Lys、Gly-Gly-Arg、Ala-Ala-Asn-PAB、Ala-PAB、PAB以及它們的任意組合。
在這個實施例子中,R8和R9可任意選擇於以下結構:H、C1-C6烷基、C2-C6烯基、C2-C6炔基。
在一些實施例子中,L可以為空。當L為空時,活性化合物Q直接
連在M上。
另一個方面,本發明提供了抗體藥物偶聯物,其結構為通式II:
(通式II)或其藥學上可接受的鹽,A是靶標部分;S是靶標部分的巰基上的硫原子;L1,L2,L表示連接子或者為空;M是一個連接基團;Q是活性化合物或者為空;m是0至6的整數;n是0到8的整數;及每個R3和R4都形成於巰基與能與巰基反應的官能團之間的反應。
在一些實施例子中,能與巰基反應的官能團可以獨立地包括馬來醯亞胺、鹵素、鹵素取代的官能團、鏈烷基醛、鏈烷基酮、磺醯基烯、矽、異氰酸酯或降冰片烯,但是這兩個官能團不能同時是馬來醯亞胺,也不能同時是鹵素。
其中,在這個實施例子中,R5、R6和R7可任意選擇於H、鹵素、C1-C6烷基、C2-C6烯基、C2-C6炔基、芳基、雜芳基、C3-C9環烷基、C3-C9雜環基、聚乙二醇、NO2、CN、SCN、OR8、SR9、NR10R11、C(=O)R12、C(=O)OR8、C(=O)NR10R11、C(=S)OR8、C(=S)NR10R11、C(=S)SR9、NR10(C=O)R12、NR10(C=S)NR10R11、O(C=O)NR10R11、
SO2R9、S(=O)2OR8以及它們的組合,其中R8、R9、R10、R11、R12可任意選擇於H、C1-C6烷基、C2-C6烯基、C2-C6炔基或它們的組合。
在具體的實施例子中,R3或R4有10個或更少的碳原子,最好5個或更少的碳原子是成環的,和/或包括酮基團。
當R3或R4為空時,L1或L2直接連到靶標部分上。
R3和R4可以相同,也可以不同。
在一些實施例子中,M可以任意選擇於,例如,C-R5、C、N、B、P、Si-R5、芳香基、雜芳香基和雜環烷基。其中,R5可以任意選擇於H、C1-C6烷基、C2-C6烯基、C2-C6炔基。在其它的實施例子中,M可以任意選擇於以下基團:
在一些實施例子中,Q是活性化合物,可以任意選擇於:微管蛋白結合劑、DNA烷化劑、DNA嵌入劑、酶抑制劑、免疫調節劑、肽和核苷酸。這裡用到的“Drug”(“藥物”)和“active agent”(“活性化合物”)是等同的。
在一些實施例子中,Q可任意選自於:類美登素、耳它汀、刺孢黴素、阿黴素、倍癌黴素及PBD。
在特定實施例子中,Q可以選擇於MMAE、MMAF、PBD、DM1、DM4。在WO 2013085925A1中描述的活性化合物可以通過引用併入本專利。
在一些實施例子中,每個內部連接部分L1、L2可以任意選擇於:C1-C6烷基、C2-C6烯基、C2-C6炔基、芳基、雜芳基、C3-C9環烷基、C3-C9雜環基、聚乙二醇、O、S、NR6、C(=O)、C(=O)O、C(=O)NR6、C=NR6、C(=S)O、C(=S)NR6、C(=S)S、NR6(C=O)、NR6(C=S)NR7、O(C=O)NR6、S(=O)2及它們的任意組合。
其中,在這個實施例子中,R6和R7可以任意選擇於H、C1-C6烷基、C2-C6烯基及C2-C6炔基。
L是連接子,連接毒素Q至連接基團M。在一些實施例子中,L包括不可裂解單元,在其它的實施例子中,L包括可裂解單元。抗體藥物偶聯物可以有一個連接子、二個連接子、三個連接子、四個連接子、五個連接子或六個連接子。
在一些實施例子中,L可以任意選擇於:C1-C9烷基、C2-C9烯基、C2-C9炔基、芳基、雜芳基、C3-C9環烷基、C3-C9雜環基、聚乙二醇、O、S、NR8、C(=O)、C(=O)O、C(=O)NR8、C=NR8、C(=S)O、C(=S)NR8、C(=S)S、NR8(C=O)、NR8(C=S)NR9、O(C=O)NR8、S(=O)2、Val-Cit-PAB、Val-Ala-PAB、Val-Lys(Ac)-PAB、Phe-Lys-PAB、Phe-Lys(Ac)-PAB、D-Val-Leu-Lys、Gly-Gly-Arg、Ala-Ala-Asn-PAB、Ala-PAB、PAB或它們的任意組合。
其中,在這個實施例子中,R8和R9可以任意選擇於H、C1-C6烷基、C2-C6烯基、C2-C6炔基。
在一些實施例子中,L為空。當L為空時,活性化合物Q與M直接相連。
A是靶標部分,在一些實施例子中,A可以選擇於抗體、抗體片段、替代體或變體、蛋白質配體、蛋白支架、肽、小分子配體。所述抗體片段包含Fab、Fab’、(Fab’)2、scFv、Fv。
本發明中的相關腫瘤抗原包括但不限於下述列表(1)-(36)中所列出的相關腫瘤抗原。實施例子中每個抗原的名稱、別稱和GenBank的登錄號均有所提供,並且可以在GenBank中查到實施例子中相關腫瘤抗原的核酸和蛋白序列。
(1)BMPR1B(骨形態發生蛋白受體-1B型,GenBank登錄號NM_001203);(2)E16(LAT1、SLC7A5,GenBank登錄號bandit_00:3486);(3)STEAP1(前列腺六次跨膜上皮抗原,GenBank登錄號NM_012449);(4)0772P(CA125、MUC16、GenBank登錄號AF361486);(5)MPF(MPF、MSLN、SMR、巨核細胞強化因數、mesothelin,GenBank登錄號NM_005823);(6)Napi3b(NAP1-3B、NPTI1b、SLC34A2、溶質載體家族34(磷
酸鈉)成員2,II型鈉依賴的磷酸鹽轉運蛋白3b,GenBank登錄號NM_006424);(7)Sema5b(FLJ10372、KIAA1445、Mm.42015、SEMA5B、SEMAG、腦信號蛋白5b Hlog,sema結構域,七個血小板反應蛋白重複(I型和類I型的),跨膜結構域(TM)和短的細胞質結構域,(腦信號蛋白)5b,GenBank登錄號AB040878);(8)PSCA hlg(2700050C12Rik、C530008016Rik、RIKENcDNA2700050C12、RIKENcDNA2700050C12基因,GenBank登錄號AY358628);(9)ETBR(內皮素B型受體,GenBank登錄號AY275463);(10)MSG783(RNF124,假想蛋白FLJ20315,GenBank登錄號NM_017763);(11)STEAP2(HGNC_8639、IPCA-1、PCANAPI、STAMPI、STEAP2、STMP、前列腺癌相關基因I、前列腺癌相關蛋白I、前列腺的六次跨膜上皮抗原2、六次跨膜前列腺蛋白,GenBank登錄號AF455138);(12)TrpM4(BR22450、FLJ20041、TRPM4、TRPM4B、暫態受體潛在陽離子通道,亞家族M,成員4,GenBank登錄號NM_017636);(13)CRIPTO(CR、CR1、CRGF、CRIPTO、TDGFI,畸胎癌衍生生長因數,GenBank登錄號NP_003203或NM_003212);(14)CD21(CR2(補體受體2)或C3DR(C3d/埃巴病毒受體)或Hs.73792,GenBank登錄號M26004);(15)CD79b(CD79B、CD79β、IGb(免疫球蛋白相關β)、B29,GenBank登錄號NM_000626);(16)FcRH2(IFGP4、IRTA4、SPAP1A(含SH2結構域的磷酸酶錨定蛋白Ia)、SPAP1B、SPAP 1C,GenBank登錄號NM_030764);
(17)HER2(ErbB2,GenBank登錄號M11730);(18)NCA(CEACAM6,GenBank登錄號M18728);(19)MDP(DPEP1,GenBank登錄號BC017023);(20)IL20Ra(IL20Ra,ZCYT0R7,GenBank登錄號AF184971);(21)Brevican(BCAN,BEHAB,GenBank登錄號AF229053);(22)EphB2R(DRT,ERK,Hek5,EPHT3,Tyro5,GenBank登錄號NM_004442);(23)ASLG659(B7h,GenBank登錄號AX092328);(24)PSCA(前列腺幹細胞抗原前體,GenBank登錄號AJ297436);(25)GEDA(GenBank登錄號AY260763);(26)BAFF-R(B細胞活化因數受體,BLyS受體3,BR3,GenBank登錄號AF116456);(27)CD22(B細胞受體CD22-B同種型,GenBank登錄號AK026467);(28)CD79a(CD79A,CD79a,免疫球蛋白相關α,與Ig(CD79B)共價相互作用並在表面上與IgM分子形成複合體,轉導涉及B細胞分化的信號的B細胞特異性蛋白,GenBank登錄號NP_001774.I);(29)CXCR5(伯基特淋巴瘤受體1,被CXCL13趨化因數活化的G蛋白偶聯受體,在淋巴細胞遷移和體液防禦中發揮作用,在HIV-2感染以及可能在AIDS、淋巴瘤、骨髓瘤、和白血病中發揮作用,GenBank登錄號NP_001701.1);(30)HLA-D0B(MHCII類分子的Beta亞基(Ia抗原),其結合肽並將其呈遞到CD4+T淋巴細胞,GenBank登錄號NP_002111.I);(31)P2X5(嘌呤受體P2X配體門控離子通道5,由胞外ATP門控的離子通道,可能涉及突觸傳遞和神經再生,其缺陷可能導致特發性逼尿肌不穩定的病理生理狀況,GenBank登錄號NP_002552.2);
(32)CD72(B細胞分化抗原CD72,Lyb-2,GenBank登錄號NP_001773.I);(33)LY64(淋巴細胞抗原64(RP105),富含亮氨酸重複(LRR)的I型膜蛋白家族,調節B細胞活化、凋亡及功能喪失,並與系統性紅斑狼瘡患者疾病活動增強有關,GenBank登錄號NP_005573.I);(34)FcRH1(Fc受體樣蛋白1,免疫球蛋白Fc結構域的推定受體,包含C2型Ig樣和ITAM結構域,可能在B淋巴細胞分化中起作用,GenBank登錄號NP_443170.1);(35)IRTA2(易位相關免疫球蛋白超家族受體2,推定的免疫受體,可能在B細胞發育和淋巴瘤發生中起作用;由易位導致的基因失調發生於一些B細胞惡性病中,GenBank登錄號NP_112571.1);(36)TENB2(推定的跨膜蛋白聚糖,與生長因數的EGF/調蛋白家族和卵泡抑素相關,GenBank登錄號AF179274)。
在特定的實施例子中,A為靶向腫瘤相關抗原的人源化單克隆抗體,包括但不限於:Trastuzumab(anti-HER2)、Pertuzumab(anti-HER2)、Rituximab(anti-CD20)、Alemtuzumab(anti-CD52)、Bevacizumab(anti-VEGF)、Adalimumab(anti-TNF-alpha)、Cetuximab(anti-EGFR)、Amatuximab(anti-mesothelin)、Blinatumomab(anti-CD19)、Brentuximab(anti-CD30)、Certolizumab pegol(anti-TNF-alpha)、Panitumumab(anti-EGFR)、Nimotuzumab(anti-EGFR)、Gemtuzumab(anti-CD33)、Golimumab(anti-TNF-alpha)、Ibritumomab(anti-CD20)、Infliximab(anti-TNF-alpha)、Ipilimumab(anti-CTLA-4)、Ofatumumab(anti-CD20)及Tositumomab(anti-CD20)。
在某些實施例子中,上述化合物中,A包括但不限於曲妥珠單抗(trastuzumab)。
治療應用
在某些實施例子中,本發明的偶聯物可以治療的腫瘤,包括但不限於:淋巴瘤、母細胞瘤、肉瘤、白血病或淋巴惡性瘤。這種癌症更具體的例子包括鱗狀細胞癌(如上皮鱗狀細胞癌)、肺癌(包括小細胞肺癌、非小細胞肺癌、肺的腺癌和肺的鱗狀細胞癌)、腹膜癌、肝癌、胃癌、胃部癌(包括胃腸癌)、胰腺癌、腦膠質瘤、宮頸癌、卵巢癌、口腔癌、肝癌、膀胱癌、泌尿系統的癌症、肝細胞瘤、乳腺癌(例如,HER2陽性乳腺癌)、結腸癌、直腸癌、結腸直腸癌、子宮內膜癌或子宮癌、唾液腺癌、腎癌、前列腺癌、外陰癌、甲狀腺癌、肛門癌、陰莖癌、黑色素瘤、多發性骨髓瘤、淋巴瘤、腦腫瘤、頭頸部癌和相關轉移性腫瘤。
本發明的偶聯物也可用於傳遞活性化合物,用於治療多種其它疾病,包括但不限於炎症性疾病、自身免疫性疾病、神經系統疾病和心血管疾病。
診斷應用
在其它實施例子中,本發明的偶聯物包含把可檢測的實體用作活性化合物。例如,此可檢測的實體可以是顯色劑。顯色劑可以是合成的或天然的產物,通過合適的成像或診斷設備,在可檢測的波長範圍內,能夠反射或發射光,如電子顯微鏡。合適的顯色劑包括但不限於有機染料,食品染料和螢光染料。
因此,在一個實施例子中,本發明提供了一種診斷方法,該診斷方法包括:把感興趣的分析物樣品與本發明中的抗體藥物偶聯物進行接觸,其中,靶標部分選擇性地結合到感興趣的分析物上。Q是可檢測的實體,或者是可以與一個或多個額外的實體進行結合的實體,這裡所說的一個或多個額外的實體包括它們自身、其它可檢測的實體;這裡所說的方法還包括分析樣品用於檢測可檢測的實體是否存在,此實體存在表示感興趣的分析物存在。在一個實施例子中,此分析物是
HER2,或者其它的與癌症相關的抗原。此方法可以在體內或體外進行。
抗體藥物偶聯物的生物學活性
可以使用已知的方法對本發明的偶聯物的藥效和毒性進行評價。例如,某一特定的化合物或某些有相同基團的化合物,它們的毒性可以通過體外哺乳動物,尤其是人類細胞的細胞評價來進行判定。這些細胞評價的結果通常能判定該化合物對哺乳動物細胞,尤其是人類細胞的毒性。或者,可以使用一些已知的方法來判定該化合物在小鼠,大鼠,兔,狗或猴等動物模型中的毒性。
某一特定化合物的藥效的判定可以使用體外試驗、動物模型和臨床試驗等本領域內公認的方法。公認的體外試驗幾乎適用於各個級別試驗的要求,包括公開的化合物在治療腫瘤、冠心病、各種免疫系統功能障礙和感染性疾病的使用條件,同樣,合適的動物模型試驗可以用於判定該化合物在治療上述疾病中的效果。當需要選擇一個動物模型進行藥效判定時,本領域的專家可以根據當前技術發展水準選擇合適的模型、劑量、給藥方式和管理體系。
本發明提供的複合物可以通過抗原抗體結合試驗來分析其特異性。本發明提供的複合物可以通過常規分析方法,如細胞抑制試驗/細胞毒試驗,來進行抗癌藥效和異種移植分析,以及類似試驗。
結合實驗技巧和參考資料,本領域內的專家很容易根據目前技術發展水準選定合適的分析方法。這些分析結果能夠確定該複合物作為抗癌藥在進行檢測試驗時所使用的合適劑量,而檢測結果能夠確定該複合物在進行腫瘤治療時合適的使用劑量。
劑型和給藥方式
除了上述描述的複合物,該發明的主體成分還包括注射進動物體內後能夠發揮轉運作用的載體以及允許將複合物運輸到靶點的稀釋
液。載體和/或稀釋液一般是合適的介質,這樣既能達到預期目的,也不影響偶聯物被運到靶點後的性能。特別是載體和/或稀釋液不能使偶聯物的有效成分失效,從而影響藥物在動物體內被運輸到靶點後的藥效。載體和/或稀釋液最好選擇水性溶液,包含鹽分和/或緩衝劑或者對動物機體來說可以接受的其它溶液。對於本領域內的專業人員來說,這些載體和溶液可以是蒸餾水、去離子水、純化或超純水、鹽溶液、PBS緩衝液以及能夠跟偶聯物互溶的其它緩衝溶液。
可以通過如下方式來進行給藥,包含但不限於:(a)口服給藥,藥品樣式包括膠囊、片劑、顆粒、噴霧、糖漿和其它形式;(b)非口服給藥,藥品樣式包括水性懸液、油狀製劑或點滴製劑、栓劑、膏劑或類似、以及通過皮下注射、腹腔注射、靜脈注射、肌內注射、皮內注射的針劑;(c)整體給藥;(d)直腸給藥或(e)陰道給藥,這些都是是本領域內的專業人員認為能夠使藥物與活體組織直接接觸的給藥方式及(f)通過緩控釋劑、儲存釋放、輸液泵方式給藥。
本發明描述了未來的給藥方式,包括眼內給藥、鼻內給藥和內耳給藥等。
在具體實施例子中,本發明提供的複合物可以以靜脈給藥的溶液形式存在,或者以濃縮凍幹後進行重溶(重溶方式:生理鹽水,5%葡萄糖溶液,或類似的等滲溶液)。給藥人員以通常通過靜脈內注射或輸注給藥。在藥物製劑領域,尤其是抗腫瘤抗體方面的專業人員,很容易提出合適的給藥方案。
實施例子
下面結合具體實施例子進一步描述本發明,這些實施例子並不限制本發明的範圍。
實施例I 連接子-活性化合物偶聯物的合成
實施例I-1 化合物9的合成
化合物2的合成
將1,3-二氨基-2-丙醇(3.15g,0.035mol)和三乙胺(4.85mL,0.035mol)溶於甲醇(120mL)中,攪拌,升溫至45℃;向反應液中緩慢滴加二碳酸二叔丁酯((Boc)2O,17.05g,0.078mol)的甲醇(80mL)溶液;滴加完畢後,反應體系在45℃溫度下攪拌30min,然後在室溫下反應1.5h。減壓蒸除溶劑,粗產物用200mL乙醚萃取3次,合併有機相並用無水硫酸鈉進行乾燥,得到白色粉末狀的化合物2(9.94g,97.8%)。LC-MS m/z(ES+),291.19(M+H)+。
化合物3的合成
將化合物2(3.89g,13.4mmol)溶于無水四氫呋喃(40mL)中,室
溫下加入溴乙酸叔丁酯(5.41mL,33.5mmol);向反應液中加入氫化鈉(60%的含量分散於礦物油中,2.42g,60.5mmol),室溫下反應5h。過濾,減壓蒸除濾液中的溶劑,所得粗品用矽膠柱色譜分離(石油醚:乙酸乙酯=10:1-5:1),得到白色固體狀態的化合物3(3.96g,73.1%)。LC-MS m/z(ES+),405.26(M+H)+。
化合物4的合成
取化合物3(1.0g,2.5mmol)溶於1,4-二氧六環(10mL)中,攪拌,室溫下加入5mL鹽酸,室溫反應16h。反應結束後,減壓蒸除溶劑,得到白色粗產品(384.2mg,69.8%)。化合物4無需純化,可直接進行下一步反應。LC-MS m/z(ES+),221.05(M+H)+。
化合物5的合成
將化合物4(242.1mg,1.1mmol)溶於飽和碳酸氫鈉/四氫呋喃的混合液(v/v=1:1,20mL)中,降溫至0℃,加入丙烯醯氯(267μL,3.3mmol)。反應體系在0℃下劇烈攪拌10min後,升至室溫下反應3h。加入鹽酸調節至pH<4,用50mL乙酸乙酯萃取2次,合併有機相並用40mL飽和氯化鈉溶液洗,用無水硫酸鎂進行乾燥,過濾,減壓蒸除濾液中的溶劑,粗產品通過製備型高效液相色譜(prep-HPLC)純化,得到了灰色粉末狀產物5(196.0mg,69.6%)。LC-MS m/z(ES+),257.12(M+H)+。
化合物7的合成
將化合物5和N,N-二異丙基乙胺(DIPEA,16.5μL,0.10mmol)用無水N,N-二甲基甲醯胺(DMF,6mL)溶,攪拌,降溫至0℃,在0℃下加入1-羥基苯並三唑(HOBt,14.9mg,0.11mmol)和N,N'-二異丙基碳二亞胺(DIC,13.9mg,0.11mmol);攪拌15min後,將化合物6加入到反應液中,升至室溫,攪拌,過夜反應。反應結束後,加入10mL水,並用20mL乙酸乙酯萃取3次;合併有機相,用無水硫酸鎂乾燥有機
相,減壓蒸除濾液中的溶劑。粗產品通過矽膠柱色譜分離純化(石油醚:乙酸乙酯=3:1),得到白色固體狀的化合物7(24.3mg,62.6%)。LC-MS m/z(ES+),467.22(M+H)+。
化合物9的合成
將化合物7溶於5mL二氯甲烷,攪拌,冰浴降溫至0℃;加入三乙胺(1mg,0.01mmol)和化合物8(73.7mg,0.1mmol),在0℃下繼續攪拌反應30min,然後升至室溫下反應1.5h。反應結束後,減壓蒸除溶劑,粗品通過製備型高效液相色譜(prep-HPLC)純化,得到白色粉末狀的化合物9(90mg,74.8%)。LC-MS m/z(ES+),1204.49(M+H)+。
實施例I-2 化合物17的合成
化合物11的合成
將化合物10(263.3mg,1.15mmol)用二氯甲烷(15mL)溶解,攪拌,冰浴降溫;在0℃下加入三乙胺(5.9μL,0.04mmol)和化合物6(300.1mg,0.39mmol)後,升至室溫下反應5h。反應結束後,減壓蒸除溶劑,粗產品通過製備型高效液相色譜(prep-HPLC)純化,得到白色固體化合物11(193.2mg,49.7%)。LC-MS m/z(ES+),994.43(M+H)+。
化合物13的合成
取化合物12(0.45g,4.2mol)和三乙胺(8mL,0.06mol)用四氫呋喃(15mL)溶解,攪拌,冰浴降溫;0℃下將2-(叔丁氧羰基氧亞胺基)-2-苯乙腈(2.1g,8.3mol)的四氫呋喃(30mL)溶液滴加到反應液中,滴加結束後升至室溫下繼續攪拌4h。反應結束後,減壓濃縮至油狀物並加入50mL二氯甲烷,用氫氧化鈉溶液(5%,30mL)和食鹽水洗,有機相用無水硫酸鈉乾燥,過濾;減壓蒸除濾液中的溶劑,粗產品通過矽膠柱層析純化(甲醇:二氯甲烷=1:10),得到黃色油狀的化合物13(803.1mg,60.7%)。LC-MS m/z(ES+),304.22(M+H)+。
化合物14的合成
化合物13(800.1mg,2.65mmol)用二氯甲烷(10mL)溶解,攪拌,加入丁二酸酐(265.2mg,2.65mmol),反應液於室溫下過夜反應。反應結束後,減壓蒸除溶劑至油狀物;粗產品通過矽膠柱層析純化(甲醇:二氯甲烷=1:8),得到灰色油狀的化合物14(506.5mg 47.6%)。LC-MS m/z(ES+),404.24(M+H)+。
化合物15的合成
將化合物14(503.5mg,1.25mmol)溶於二氯甲烷(10mL),加入三氟乙酸(2mL),室溫下反應3h。反應結束後,減壓蒸除溶劑,得到灰
色油狀化合物15(190.2mg,75.1%),粗品無需進一步純化。LC-MS m/z(ES+),204.13(M+H)+。
化合物16的合成
將碳酸鉀(68.3mg,0.5mmol)的水(5mL)溶液和化合物15(67.2mg,0.33mmol)的乙酸乙酯(10mL)溶液加入到反應瓶中,攪拌,冰浴降溫;在0℃下逐滴滴加丙烯醯氯(53.6μL,0.67mmol)的乙酸乙酯(10mL)溶液,繼續攪拌10min後升至室溫下反應5h。反應結束後,用鹽酸調節體系至pH<5;用20mL乙酸乙酯萃取2次,合併有機相並用20mL飽和食鹽水洗,無水硫酸鎂乾燥,過濾,蒸除濾液中的溶劑;粗產品通過矽膠柱層析純化(甲醇:二氯甲烷=10:1),得到黃色油狀的化合物16(63.1mg,61.7%)。LC-MS m/z(ES+),312.15(M+H)+。
化合物17的合成
將化合物16、1-羥基苯並三唑(HOBt,9.7mg,0.07mmol)和N,N'-二異丙基碳二亞胺(DIC,11μL,0.07mmol)用8mL N,N-二甲基甲醯胺(DMF)溶解,攪拌,冰浴降溫,在0℃下加入化合物11(59.1mg,0.06mmol)和N,N-二異丙基乙胺(DIPEA,12.4μL,0.07mmol),然後升至室溫下繼續攪拌反應24h。反應結束後,減壓蒸除溶劑,粗產品通過製備型高效液相色譜(prep-HPLC)純化,得到白色固體狀的化合物17(11.3mg,39.5%)。LC-MS m/z(ES+),1287.56(M+H)+。
實施例I-3 化合物25的合成
化合物20的合成
將化合物18用無水N,N-二甲基甲醯胺(DMF,15mL)溶解,攪拌,冰浴降溫,在0℃氮氣保護下加入1-羥基苯並三唑(HOBt,33.8mg,0.25mmol)和化合物19;攪拌15min後加入吡啶(3mL)和N,N-二異丙基乙胺(DIPEA,52.4μL,0.30mmol),0℃下攪拌30min後升至
室溫下反應3h;向反應液中補加N,N-二異丙基乙胺(DIPEA,52.4μL,0.30mmol),室溫下繼續反應32h。反應結束後,減壓蒸除溶劑,粗品通過矽膠柱色譜純化(甲醇:二氯甲烷=20:1),得到白色固體化合物20(126.4mg,37.5%)。LC-MS m/z(ES+),1344.77(M+H)+。
化合物21的合成
將化合物20(126.4mg,0.1mmol)用N,N-二甲基甲醯胺(8mL)溶解,室溫攪拌,加入二乙胺(4mL,38.8mmol),繼續反應2h。反應結束後,減壓蒸除溶劑,得到粗產品21(104.1mg,99%),無需純化,可直接進行下一步反應。LC-MS m/z(ES+),1123.72(M+H)+。
化合物23的合成
將化合物22(2.64g,20.00mmol)和三乙胺(16.60mL,120.00mmol)用無水二氯甲烷(60mL)溶解,攪拌,氬氣置換,冰浴降溫;丙烯醯氯(7.31mL,90.00mmol)用無水二氯甲烷(50mL)溶解後,在0℃氬氣保護下將其加入到反應液中;將反應液升至室溫下反應4h。反應結束後向體系中加入飽和碳酸氫鈉溶液(150mL)和飽和食鹽水(150mL),用150mL二氯甲烷萃取3次,合併有機相,用無水硫酸鎂進行乾燥,過濾,減壓蒸除濾液中的溶劑,粗品通過矽膠柱色譜純化(石油醚:乙酸乙酯=10:1),得到白色固體化合物23(4.88g,83.0%)。LC-MS m/z(ES+),295.10[M+H]+。
化合物24的合成
取化合物23(444.1mg,1.5mmol)和三乙胺(0.23mL,1.66mmol)用二氯甲烷(30mL)溶解,攪拌,冰浴降溫;逐滴滴加巰基乙酸(0.23mL,3.32mmol)的二氯甲烷(5mL)溶液;滴加完畢,將體系升至室溫下攪拌過夜。反應結束後,減壓蒸除溶劑,粗品通過矽膠柱色譜純化(甲醇:二氯甲烷=60:1-30:1),得到黃色油狀的化合物24(1.72g,36.87%)。LC-MS m/z(ES-),385.10(M-H)-。
合物25的合成
取化合物24(22.2mg,0.057mmol)、1-羥基苯並三唑(HOBt,9.3mg,0.069mmol)和1-乙基-(3-二甲基氨基丙基)碳醯二亞胺鹽酸鹽(EDCI,16.5mg,0.086mmol)用5mL二氯甲烷溶解,攪拌,將化合物21(64.5mg,0.063mmol)和N,N-二異丙基乙胺(DIPEA,20.3μL,0.104mmol)加入到反應液中,升至室溫下反應24h。產物通過製備型高效液相色譜(prep-HPLC)純化,得到白色固體化合物25(25.3mg,29.7%)。LC-MS m/z(ES+),1479.80(M+H)+。
實施例I-4 化合物31的合成
化合物27的合成
取化合物18(194.2mg,0.25mmol)用無水N,N-二甲基甲醯胺(DMF,15mL)溶解,攪拌,氮氣置換,冰浴降溫;加入1-羥基苯並三唑(HOBt,34.2mg,0.25mmol)和化合物26(200.3mg,0.28mmol);攪拌15min後,加入吡啶(3mL)和N,N-二異丙基乙胺(DIPEA,53.1μL,0.32mmol),0℃攪拌30min後升至室溫下反應3h;補加N,N-二異丙基乙胺(DIPEA,53.1μL,0.32mmol),繼續反應24h。反應結束後,減壓蒸除溶劑,粗品通過矽膠柱色譜純化,得到白色固體化合物27(126.2mg,37.0%)。LC-MS m/z(ES+),1398.75(M+H)+。
化合物28的合成
將化合物27(126.2mg,0.09mmol)用N,N-二甲基甲醯胺(DMF,8mL)溶解,攪拌,加入二乙胺(4mL),室溫下反應2.5h。反應結束後,減壓蒸除溶劑,得到粗產品28(73.3mg,68.9%),無需純化,可直接進行下一部反應。LC-MS m/z(ES+),1176.68(M+H)+。
化合物30的合成
取化合物29(1.87g,7.5mmol)和三乙胺(Et3N,104μL,0.75mmol),用二氯甲烷(40mL)溶解,攪拌,冰浴降溫;在0℃下逐滴加入巰基乙酸(103.9μL,1.5mmol)的二氯甲烷(10mL)溶液,滴加完畢後升至室溫下反應過夜。反應結束後減壓蒸除溶劑,粗品通過矽膠柱色譜純化,得到白色固體化合物30(1.72g,36.87%)。LC-MS m/z(ES-),342.11(M-H)-。
化合物31的合成
將化合物30(22.2mg,0.065mmol)、1-羥基苯並三唑(HOBt,8.8mg,0.065momol)和N,N'-二異丙基碳二亞胺(DIC,11μL,0.065mmol)用N,N-二甲基甲醯胺(DMF,8mL)溶解,攪拌,冰浴降溫至0℃;加入化合物28(63.7mg,0.054mmol)和N,N-二異丙基乙胺(DIPEA,12.4μL,0.054mmol),升至室溫下反應24h。反應結束後,通過矽膠柱色譜純化(甲醇:二氯甲烷=60:1-30:1),得到白色固體化合物31(11.3mg,39.5%)。LC-MS m/z(ES+),1499.78(M+H)+。
實施例I-5 化合物36的合成
化合物33的合成
將3,5-二氨基苯甲酸(501.8mg,3.3mmol)用乙酸乙酯(20mL)溶解,加入碳酸鉀(9.0g,66mmol)的水(20mL)溶液,然後加入丙烯醯
氯(1mL,13mmol),反應液中有淡棕色固體析出,升至室溫後析出物消失;室溫攪拌反應2h。反應結束後,去除有機相,水相用5%的鹽酸調節至pH<4時有固體析出,過濾,收集的固體用石油醚洗,用乙酸乙酯溶解;有機相用無水硫酸鎂乾燥後過濾,減壓蒸除濾液中的溶劑;將粗品分散于水中,過濾,用乙醚徹底洗滌,得到灰色粉末狀化合物33(670.2mg,78%)。LC-MS m/z(ES+),261.09(M+H)+。
化合物34的合成
將化合物33(260.1mg,1.0mmol)、1-乙基-(3-二甲基氨基丙基)碳醯二亞胺鹽酸鹽(EDCI,210.9mg,1.1mmol)和N-羥基琥珀醯亞胺(126.6mg,1.1mmol)溶於N,N-二甲基甲醯胺(DMF,14mL),攪拌,室溫過夜反應。反應結束後,減壓蒸除溶劑,粗品通過矽膠柱色譜純化(二氯甲烷:甲醇=10:1),得到淡棕色固體化合物34(273mg,76.4%)。LC-MS m/z(ES+),358.11(M+H)+。
化合物35的合成
將4-氨基丁酸(82.4mg,0.8mmol)和N,N-二異丙基乙胺(DIPEA,489μL,2.8mmol)用N,N-二甲基甲醯胺(DMF,10mL)溶解,攪拌,冰浴降溫;在0℃下加入化合物34(260.7mg,0.73mmol)的N,N-二甲基甲醯胺(DMF,10mL)溶液,攪拌10min後,升至室溫下過夜反應。反應結束後,減壓蒸除溶劑,粗品通過矽膠柱色譜純化(CH2Cl2:MeOH=10:1),得到化合物35(192.3mg,76.2%)。LC-MS m/z(ES+),346.14(M+H)+。
化合物36的合成
將化合物35(34.5mg,0.1mmol)溶于無水N,N-二甲基甲醯胺(DMF,10mL),攪拌,冰浴降溫;0℃下加入1-羥基苯並三唑(HOBt,14.9mg,0.11mmol)、1-乙基-(3-二甲基氨基丙基)碳醯二亞胺鹽酸鹽(EDCI,21.1mg,0.11mmol)和N,N-二異丙基乙胺(DIPEA,19.2μL,0.11
mmol);15min後加入化合物21(112.3mg,0.1mmol),升至室溫下反應24h。反應結束後,加入15mL水,用20mL乙酸乙酯萃取3次,合併有機相,用無水硫酸鎂乾燥有機相,過濾,減壓蒸除濾液中的溶劑,粗品通過矽膠柱色譜純化(CH2Cl2:MeOH=10:1),得到白色固體化合物36(56.5mg,39%)。LC-MS m/z(ES+),1450.84(M+H)+。
實施例I-6 化合物43的合成
化合物38的合成
將化合物37(1.05g,6.9mmol)和4-二甲氨基吡啶(DMAP,1.94g,15.9mmol)用二氯甲烷(20mL)溶解,攪拌,冰浴降溫;0℃下滴加丙
烯醯氯,滴完升至室溫下反應1h。反應結束後加入50mL水淬滅反應,並用20mL二氯甲烷萃取3次,合併有機相,用30mL飽和碳酸氫鈉溶液洗1次,飽和食鹽水洗1次,用無水硫酸鎂乾燥有機相,過濾,減壓蒸除濾液中的溶劑,得到淡黃色半固態化合物38(1.51g,85.8%)。LC-MS m/z(ES+),253.04(M+H)+。
化合物39的合成
將化合物38(1.56g,5.94mmol)和4-氨基丁酸(673.0mg,6.53mmol)用乙醇(15ml)和氫氧化鈉(713.3mg,17.82mmol)的水(15mL)溶液溶解,攪拌,80℃下反應2h。反應結束後冷卻至室溫,減壓蒸除溶劑,用鹽酸(0.5N)調節體系的酸鹼度至pH<7;過濾,收集固體,用10mL水洗2次,乾燥,得到灰白色固體化合物39(490.2mg,25.8%)。LC-MS m/z(ES+),320.03(M+H)+。
將化合物39(230.1mg,0.72mmol)、1-羥基苯並三唑(HOBt,116.7mg,0.86mmol)、1-乙基-(3-二甲基氨基丙基)碳醯二亞胺鹽酸鹽(EDCI,151.8mg,0.79mmol)和N,N-二異丙基乙胺(DIPEA,279.2mg,2.2mmol)用N,N-二甲基甲醯胺(DMF,20mL)溶解,攪拌,冰浴降溫,在0℃下攪拌;1h後加入化合物40(149.1mg,0.79mmol),將反應液升至室溫下反應18h。反應結束後,用飽和食鹽水(50mL)淬滅反應,20mL乙酸乙酯萃取3次;合併有機相,無水硫酸鎂乾燥,過濾,減壓蒸除濾液中的溶劑,粗品通過矽膠柱色譜純化(甲醇:二氯甲烷=200/1-10/1),得到黃色固體化合物41(97.3mg,27.6%)。LC-MS m/z(ES+),490.23(M+H)+。
化合物43的合成
化合物41(90.1mg,0.18mmol)和2-乙氧基-1-乙氧碳醯基-1,2-二氫喹啉(EEDQ,54.6mg,0.22mmol),用無水二氯甲烷(7ml)和無水甲醇(0.07mL)溶解,室溫攪拌1h;加入化合物42(133.5mg,0.184
mmol),繼續攪拌反應18h。反應結束後,減壓蒸除溶劑,粗品通過製備型高效液相色譜(prep-HPLC)純化,得到白色固體狀的化合物43(12.3mg,5.6%)。LC-MS m/z(ES+),1197.51(M+H)+。
實施例I-7 化合物49的合成
化合物45的合成
化合物44(1.13g,6.53mmol)用甲醇(30mL)溶,攪拌,冰浴降溫,0℃下通入氯化氫,繼續在0℃反應2h。反應結束後減壓蒸除溶劑,殘留物用50mL水溶解,加入飽和碳酸氫鈉溶液調節至pH為8,用20mL乙酸乙酯萃取3次,合併有機相並用無水硫酸鎂進行乾燥,
過濾,濃縮濾液得到黃色油狀的化合物45(710.1mg,65.1%)。LC-MS m/z(ES+),168.07(M+H)+。
化合物46的合成
將化合物45(700.5mg,4.19mmol))溶於吡啶(20mL),攪拌,冰浴降溫;0℃下向反應液中滴加丙烯醯氯,升溫至100℃反應2h。反應結束後,冷卻至室溫,減壓蒸除溶劑,粗品通過矽膠柱色譜純化(甲醇:二氯甲烷=200/1~10/1),得到黃色固體化合物46(520.4mg,45.2%)。LC-MS m/z(ES+),276.09(M+H)+。
化合物47的合成
將化合物46(510.2mg,1.85mmol)和氫氧化鈉(370.6mg,9.26mmol)用四氫呋喃(THF,10mL)和水(10mL)的混合溶劑溶解,攪拌,室溫反應4h。反應結束後減壓濃縮溶劑,加入鹽酸(1N)調節至pH=7;過濾得到類白色固體化合物47(360.2mg,74.1%)。LC-MS m/z(ES+),262.07(M+H)+。
化合物48的合成
將化合物47(120.5mg,0.5mmol)、1-羥基苯並三唑(HOBt,4.7mg,0.6mmol)、1-乙基-(3-二甲基氨基丙基)碳醯二亞胺鹽酸鹽(EDCI,96.8mg,0.5mmol)和N,N-二異丙基乙胺(DIPEA,178.1mg,1.4mmol)用N,N-二甲基甲醯胺(DMF,10mL)溶解,攪拌,冰浴降溫;在0℃下攪拌1h後,將化合物40(95.1mg,0.5mmol)加入到反應液中,升至室溫下反應18h。反應結束後,加入20mL食鹽水淬滅,用10mL乙酸乙酯萃取3次,合併有機相,用無水硫酸鎂乾燥,過濾,減壓蒸除濾液中的溶劑,粗品通過矽膠柱色譜純化(甲醇:二氯甲烷=100/1~20/1),得到類白色固體化合物41(71mg,35.8%)。LC-MS m/z(ES+),432.07(M+H)+。
化合物49的合成
將化合物48(60.2mg,0.14mmol)和2-乙氧基-1-乙氧碳醯基-1,2-二氫喹啉(EEDQ,41.3mg,0.17mmol)用無水二氯甲烷(CH2Cl2,6ml)和無水甲醇(MeOH,0.06mL)溶解,攪拌,室溫下反應1h;加入化合物42(100.9mg,0.14mmol),繼續攪拌反應18h。反應結束後,減壓蒸除溶劑,粗品通過製備型高效液相色譜(prep-HPLC)純化,得到白色固體狀的化合物49(12.4mg,7.61%)。LC-MS m/z(ES+),1139.45(M+H)+。
實施例I-8 化合物55的合成
化合物50的合成
取化合物4(440.0mg,2mmol)用甲醇(MeOH,10mL)溶解,攪拌,升溫至45℃,加入三乙胺(Et3N,332.7μL,2.4mmol);將二碳酸二叔丁酯((Boc)2O,436.2mg,2mmol)用甲醇(MeOH,10mL)溶解後加入到反應液中;45℃下反應30min,然後降至室溫反應2h。反應結束後,減壓蒸除溶劑,粗品用鹽酸(5%,10mL)和飽和氯化鈉(15mL)洗,用10mL乙酸乙酯萃取3次;合併有機相,乾燥,過濾,減壓蒸除濾液中的溶劑,粗品通過重結晶純化(石油醚:乙酸乙酯=2:1,10mL),得到白色粉末狀化合物50(375.4mg,75.6%)。LC-MS m/z(ES+),249.15(M+H)+。
化合物51的合成
將化合物50(248.0mg,1.0mmol)用飽和碳酸氫鈉溶液/四氫呋喃的混合溶劑((v/v=1:1,20mL)溶解,攪拌,冰浴降溫;0℃下加入丙烯醯氯(121μL,1.5mmol),繼續攪拌10min後升至室溫下反應3h。反應結束後用鹽酸調節至pH<4,用20mL乙酸乙酯萃取3次,合併有機相後用30mL的飽和食鹽水洗,乾燥有機相,過濾,減壓蒸除濾液中的溶劑,粗品通過製備型高效液相色譜(prep-HPLC)純化,得到灰色油狀的化合物51(176.1mg,58.3%)。LC-MS m/z(ES+),303.16(M+H)+。
化合物52的合成
將化合物51(30.2mg,0.1mmol)、1-羥基苯並三唑(HOBt,14.7mg,0.11mmol)和N,N'-二異丙基碳二亞胺(DIC,13.9mg,0.11mmol)用N,N-二甲基甲醯胺(DMF,6mL)溶解,攪拌,冰浴降溫至0℃;15min後,將化合物6(20.5mg,0.09mmol)和N,N-二異丙基乙胺(DIPEA,19.2μL,0.11mmol)加入到反應液中,升至室溫下攪拌過夜。反應結束後,加入10mL水淬滅,用20mL乙酸乙酯萃取3次,合併有機相,用
無水硫酸鈉乾燥,過濾,減壓蒸除濾液中的溶劑,粗品通過矽膠柱色譜純化(二氯甲烷:甲醇=20:1),得到白色固體化合物52(28.2mg,60.7%)。LC-MS m/z(ES+),513.26(M+H)+。
化合物53的合成
將化合物52(28.2mg,0.06mmol)用二氯甲烷(5mL)溶解,加入三氟乙酸(1mL),室溫攪拌3h。反應結束後,減壓蒸除溶劑,得到灰色固體化合物53(20.4mg,88.2%),無需純化,可直接進行下一步反應。LC-MS m/z(ES+),413.21(M+H)+。
化合物54的合成
將化合物53(41.2mg,0.1mmol)用N,N-二甲基甲醯胺(DMF,10mL)溶解,攪拌,冰浴降溫;0℃下滴加三乙胺(6.9μL,0.05mmol)和化合物8(73.7mg,0.1mmol),繼續攪拌30min後升至室溫下反應5h。反應結束後,減壓蒸除溶劑,粗品通過製備型高效液相色譜(prep-HPLC)純化,得到白色粉末狀的化合物54(73mg,63.6%)。LC-MS m/z(ES+),1148.47(M+H)+。
化合物55的合成
將化合物54(573.7mg,0.5mmol)用N,N-二甲基甲醯胺(DMF,10mL)溶解,攪拌,冰浴降溫;0℃下加入溴乙醯溴(150.0mg,0.75mmol),攪拌10min後升至室溫下反應3h。反應結束後加入20mL水,用20mL乙酸乙酯萃取3次,合併有機相,乾燥,過濾,濃縮,粗品通過製備型高效液相色譜(prep-HPLC)純化,得到黃色粉末狀的化合物55(421mg,66.4%)。LC-MS m/z(ES+),1270.38(M+H)+。
實施例I-9 化合物59的合成
化合物56的合成
將碳酸鉀(51.2mg,0.37mmol)的水(5mL)溶液和化合物15(50.0mg,0.25mmol)的乙酸乙酯(10mL)溶液混合,攪拌,冰浴降溫;將丙烯醯氯(16μL,0.2mmol)用乙酸乙酯(8mL)溶解後,於0℃下緩慢滴加到反應液中,攪拌10min後升至室溫下反應5h。反應結束後,加入鹽酸調節至pH<5;用15mL乙酸乙酯萃取3次,合併有機相,用15mL飽和食鹽水洗,無水硫酸鎂乾燥有機相,過濾,減壓蒸除濾液中的溶劑,粗品通過矽膠柱色譜純化(甲醇:二氯甲烷=8:1),得到灰色油狀化合物56(26.2mg,40.1%)。LC-MS m/z(ES+),258.14(M+H)+。
化合物57的合成
將化合物56(26.0mg,0.10mmol)用三氯甲烷(10mL)溶解,攪拌,加入順丁烯二酸酐(28.1mg,0.11mmol),加熱回流12h。反應結束後冷卻至室溫,過濾收集的固體用30mL三氯甲烷洗3次,得到白色固體化合物57(20.1mg,59.1%)。LC-MS m/z(ES+),356.14(M+H)+。
化合物58的合成
將化合物57(20.1mg,0.054mmol)和醋酸鈉(6.3mg,0.047mmol)用醋酸酐(10mL)溶解,加熱至100℃反應2h。反應結束後,將反應液緩慢倒入攪拌的碎冰中,加入冰水,攪拌1h,有固體析出;過濾,收集的固體用15mL冰水洗3次,得到白色固體化合物58(9.1mg,46.1%)。LC-MS m/z(ES+),338.13(M+H)+。
化合物59的合成
將化合物58(8.1mg,0.02mmol)、1-羥基苯並三唑(HOBt,3.25mg,0.02mmol)和N,N'-二異丙基碳二亞胺(DIC,3.7μL,0.02mmol)用N,N-二甲基甲醯胺(DMF,5mL)溶解,攪拌,冰浴降溫;0℃下加入化合物11(20.1mg,0.02mmol)和N,N-二異丙基乙胺(DIPEA,4.1μL,0.02mmol),升至室溫下反應24h。反應結束後,減壓蒸除溶劑,粗品通過製備型高效液相色譜(prep-HPLC)純化,得到白色固體化合物59(9.3mg,34.9%)。LC-MS m/z(ES+),1313.53(M+H)+。
實施例I-10 化合物64的合成
化合物60的合成
將化合物32(140.0mg,0.9mmol)用N,N-二甲基甲醯胺(DMF,6mL)溶解,攪拌,滴加順丁烯二酸酐(89.8mg,0.9mmol),升溫至60℃反應6h。反應結束後減壓蒸除溶劑;用5ml乙酸乙酯重結晶得到白色固體化合物60(209.1mg,90.7%)。LC-MS m/z(ES+),(M+H)+ 251.06。
化合物61的合成
將碳酸鉀(201.3mg,1.4mmol)的水(15mL)溶液和化合物60(209.1mg,0.9mmol)的乙酸乙酯(20mL)溶液混合,攪拌,冰浴降溫;在0℃下滴加丙烯醯氯(90μL,1.1mmol)的乙酸乙酯(10mL)溶液,滴加完畢升至室溫下反應5h。反應結束後加入鹽酸調節至pH<5,用20mL乙酸乙酯萃取2次,合併有機相,用20mL飽和食鹽水洗,無水硫酸鎂乾燥,過濾,減壓蒸除濾液中的溶劑,得到灰色油狀的化合物61(201.0mg,82.7%)粗品,無需純化,可直接進行下一步反應。LC-MS m/z(ES+),(M+H)+ 304.07。
化合物62的合成
將化合物61(201.0mg,0.7mmol)的粗品用乙酸酐(30mL)溶解,加入乙酸鈉(60.5mg,0.7mmol),加熱至90℃反應3h。反應結束後將反應液倒入冰水中,攪拌30min,用20mL乙酸乙酯萃取3次,合併有機相,乾燥,濃縮,粗品通過製備型高效液相色譜(prep-HPLC)純化,得到白色固體化合物62(92.2mg,48.6%)。LC-MS m/z(ES+),(M+H)+ 287.06。
化合物64的合成
將化合物62(57.0mg,0.2mmol)、1-羥基苯並三唑(HOBt,27.2mg,0.2mmol)、N,N'-二異丙基碳二亞胺(DIC,29.3μL,0.2mmol)和N,N-二異丙基乙胺(DIPEA,0.2mmol,33.1μL)用N,N-二甲基甲醯胺(DMF,6mL)溶解,攪拌,冰浴降溫;攪拌30min,在0℃下加入化合
物63(109.8mg,0.15mmol),升至室溫下反應24h。反應結束後,減壓蒸除溶劑,粗品通過製備型高效液相色譜(prep-HPLC)純化,得到白色固體化合物64(94.8mg,47.6%)。LC-MS m/z(ES+),1000.53(M+H)+。
實施例I-11 化合物69的合成
化合物66的合成
將化合物65(145.0mg,1.0mmol)用N,N-二甲基甲醯胺(DMF,6mL)溶解,緩慢滴加順丁烯二酸酐(89.8mg,0.9mmol),加熱回流12h。反應結束後,冷卻至室溫,過濾所得固體析出物用20mL二氯甲烷洗3次,得到白色固體化合物66(110.2mg,45.1%)。LC-MS m/z(ES+),244.02(M+H)+。
化合物67的合成
將化合物66(110.2mg,0.5mmol)和乙酸鈉(14.2mg,0.2mmol)用乙酸酐(10mL)溶解,加熱回流反應6h。反應結束後,將反應液緩慢倒入攪拌的碎冰中,加入適量冰水,攪拌1h,有固體析出,過濾,
將固體用10mL冰水洗3次,得到白色固體化合物67(87.3mg,85.7%)。LC-MS m/z(ES+),226.01(M+H)+。
化合物68的合成
將化合物67(87.3mg,0.4mmol)用N,N-二甲基甲醯胺(DMF,6mL)溶解,攪拌,加入丁二酸酐(38.8mg,0.4mmol),加熱至80℃攪拌過夜。反應結束後,減壓蒸除溶劑,粗品通過製備型高效液相色譜(prep-HPLC)純化,得到白色固體化合物68(45.0mg,35.7%)。LC-MS m/z(ES+),326.02(M+H)+。
化合物69的合成
將化合物68(45.0mg,0.14mmol)、1-羥基苯並三唑(HOBt,19.0mg,0.14mmol)、N,N'-二異丙基碳二亞胺(DIC,20.5μL,0.14mmol)和N,N-二異丙基乙胺(DIPEA,23.2μL,0.14mmol)用N,N-二甲基甲醯胺(DMF,10mL)溶解,攪拌,冰浴降溫;1h後,在0℃下加入化合物63(76.9mg,0.11mmol),升至室溫下反應36h。粗品通過製備型高效液相色譜(prep-HPLC)純化,得到白色固體化合物69(64.3mg,44.3%)。LC-MS m/z(ES+),1039.49(M+H)+。
實施例I-12 化合物74的合成
化合物71的合成
將化合物69(1.0g,6.10mmol)、4-氨基丁酸(691.9mg,6.71mmol)和三乙胺(3.09g,30.5mmol)用30mL正丁醇溶解,攪拌,加熱至90℃反應18h。反應結束後,冷卻至室溫,減壓蒸除溶劑,100mL水稀釋後用30mL乙酸乙酯萃取3次,合併有機相,無水硫酸鎂乾燥,過濾,減壓蒸除溶劑,粗品通過矽膠柱色譜純化(甲醇:二氯甲烷=200/1~10/1),得到黃色固體化合物71(482.3mg,34.3%)。LC-MS m/z(ES+),231.06(M+H)+。
化合物72的合成
將化合物71(450.5mg,1.95mmol)和三乙胺(590.8mg,5.85mmol)用二氯甲烷(20ml)溶解,攪拌,冰浴降溫;在0℃下滴加丙烯醯氯(947.2mg,10.47mmol),升至室溫下攪拌18h。反應結束後,加入50mL水淬滅,用20mL萃取3次,合併有機相後用30mL食鹽水洗,無水硫酸鎂進行乾燥,過濾,減壓蒸除濾液中的溶劑,得到黃色油狀化合物72(255.4mg,46%)。LC-MS m/z(ES+),285.07(M+H)+。
化合物73的合成
將化合物3(155.7mg,0.547mmol)、1-羥基苯並三唑(HOBt,88.7mg,0.656mmol)、1-乙基-(3-二甲基氨基丙基)碳醯二亞胺鹽酸鹽(EDCI,115.4mg,0.602mmol)和N,N-二異丙基乙胺(DIPEA,212.1mg,1.64mmol)用N,N-二甲基甲醯胺(DMF,10mL)溶解,攪拌,冰浴降
溫;1h後,在0℃下加入化合物40(113.3mg,0.602mmol),升至室溫下反應18h。反應結束後,加入30mL食鹽水淬滅,用10mL二氯甲烷萃取3次,合併有機相,無水硫酸鎂進行乾燥,過濾,減壓蒸除濾液中的溶劑,粗品通過矽膠柱色譜純化(甲醇:二氯甲烷=200/1~10/1),得到黃色固體化合物73(90.2mg,36.2%)。LC-MS m/z(ES+),455.17(M+H)+。
化合物74的合成
將化合物73(85.4mg,0.19mmol)和2-乙氧基-1-乙氧碳醯基-1,2-二氫喹啉(EEDQ,55.4mg,0.23mmol)用無水二氯甲烷(7ml)和無水甲醇(0.07mL)溶解,攪拌,室溫反應1h;加入化合物42(135.7mg,0.19mmol),繼續反應18h。反應結束後,減壓蒸除溶劑,粗品通過製備型高效液相色譜(prep-HPLC)純化,得到白色固體化合物74(19.1mg,6.7%)。LC-MS m/z(ES+),1162.45(M+H)+。
實施例II 抗體偶聯藥物的製備
一般偶聯過程
將DTPA(1mM)和3.0-5.0當量的TCEP(10mM)加到含有10mg/mL抗體的PCR管中,混合1小時以減少抗體中的二硫鍵,再將不同數量的連接子啟動劑加到反應混合物中用旋渦振盪器震盪過夜。所有反應都在常溫下進行。採用凝膠電泳(SDS-PAGE)和HIC(疏水性)-HPLC對結果進行分析。
抗體偶聯藥利用還原性的SDS-PAGE分析:將帶有緩衝液的樣品
點在8%-15%丙烯醯胺凝膠上,並利用UVP BioDoc-it成像系統對凝膠拍照。
在第2和3通道出現了大於等於50kDa的條帶,這表明巰基橋接偶聯是有效的(H,L)。75kDa的條帶代表了由一對橋接的巰基將一個重鏈和一個輕鏈(LH)連接起來。兩個重鏈由一對或兩對巰基橋接,形成的條帶在100kDa處(HH);125kDa處的條帶代表了只有一條輕鏈沒有和重鏈形成橋接偶聯(LHH);最後,150kDa代表了包含兩條重鏈和兩條輕鏈的整個橋接的抗體(LHHL)。
利用HIC-HPLC分析抗體偶聯藥物的條件:HPLC柱:TSK-GEL Butyl-NPR,規格4.6*35mm;緩衝液A:75%的磷酸鈉(20mM,pH 7.0),25%的異丙醇(v/v);緩衝液B:磷酸鈉(20mM,pH 7.0),硫酸銨(1.5mM);流速:1.0mL/min。
抗體偶聯藥物的體內評價
第一天鋪板,將人卵巢癌細胞株如OVCAR3的細胞懸液以100μl/孔,5000個/孔的密度加到96孔板中,置於水飽和的37℃CO2培養箱培養過夜。第二天,將兩種共價巰基偶聯的ADC:MSL-31和MSL-75,濃度進行梯度稀釋並加到含有OVCAR3的96孔板中,100μl/孔。初始的偶聯藥濃度為100000ng/ml,濃度稀釋到0.001ng/ml。繼續置於37℃培養箱中培養72小時。細胞活性由細胞活性試劑盒(Cell Counting Kit-8)(DOJINDO,CK04)檢測,利用酶標儀檢測吸光值。IC50值為某種藥物在一定濃度誘導腫瘤細胞凋亡50%,該濃度稱為50%抑制濃度,即凋亡細胞與全部細胞數之比等於50%時所對應的濃度,該值由曲線擬合軟體Graphpad計算得到。
實施例II-1 MSL-C31的製備
將DTPA(1mM)和5.0當量的TCEP(10mM)加到含有10mg/mL的抗-MSL抗體的PCR管中,混合1小時對抗體中的二硫鍵進行還原,隨
後將25%的DMSO加到反應混合物中,複合物31(5.0當量,10mM)再加入到前面的反應混合物中用旋渦振盪器震盪過夜,所有反應都在常溫下進行,當反應結束後將該混合物轉移到4ml的超濾離心管中,用PBS透析3次,然後收集反應混合物。圖2中顯示右邊的這些至少含有1對巰基的產物移動的比左邊那些單獨的重鏈(H)或者輕鏈(L)要慢。重鏈和輕鏈偶聯後的條帶在75kDa(HL)處,重鏈和重鏈偶聯後的條帶在100kDa(HH)處。在HIC-HPLC的色譜圖中有3個峰,分別代表DAR為3、4、5的峰。依據HIC-HPLC(圖3)的結果可知合成的MSL-C31藥物抗體偶聯比為3.60。
圖2還原膠SDS-PAGE結果a)裸抗,b)橋接偶聯的產物MSL-C31。
圖3MSL-C31的HIC-HPLC色譜圖
實施例II-2 MSL-C75的製備
將DTPA(1mM)和5.0當量的TCEP(10mM)加到含有10mg/mL的抗-MSL抗體的PCR管中,混合1小時對抗體中的二硫鍵進行還原,隨後將25%的DMSO加到反應混合物中,複合物75(5.0當量,10mM)再加入到前面的反應混合物中用旋渦振盪器震盪過夜,所有反應都在常溫下進行,當反應結束後將該混合物轉移到4ml的超濾離心管中,用PBS緩衝液透析換液3次,然後收集反應混合物。樣本運用電泳進行分析,還原性的SDS-PAGE結果見圖4。圖中顯示左邊泳道是裸抗,右邊泳道是連有MSL-C75的抗體。依據HIC-HPLC的結果可知合成的MSL-C75藥物抗體偶聯比為3.87。
圖4MSL-C75的還原膠SDS-PAGE結果
圖5MSL-C75的HIC-HPLC色譜圖
實施例II-3 CD59-C78的製備
將DTPA(1mM)和5.0當量的TCEP(10mM)加到含有10mg/mL的抗-CD59抗體的PCR管中,混合1小時還原抗體中的二硫鍵,隨後將25%的DMSO加到反應混合物中,化合物78(5.0當量,10mM)再加入到前面的反應混合物中用旋渦振盪器震盪過夜,所有反應都在常溫下進行,當反應結束後將該混合物轉移到4ml的超濾離心管中,用PBS透析換液3次。HIC-HPLC的結果表明合成的CD59-C78藥物抗體偶聯比為3.66。
圖6還原膠SDS-PAGE結果a)裸抗,b)CD59-C78
圖7CD59-C78的HIC-HPLC色譜圖
實施例II-4 HER2-C78偶聯物的製備
將DTPA(1mM)和5.0當量的TCEP(10mM)加到含有10mg/mL的抗-Her2抗體的PCR管中,混合1小時還原抗體中的二硫鍵,隨後將25%的DMSO加到反應混合物中,複合物75(5.0當量,10mM)再加入到前面的反應混合物中用渦旋振盪器震盪過夜,所有反應都在常溫下進行,當反應結束後將該混合物轉移到4ml的超濾離心管中,用PBS透析換液3次。
HER2-C78連接的穩定性研究
為了確定共價巰基偶聯以及常規巰基偶聯的ADCs的降解速率,用前面準備的三種ADC樣品通過ELISA實驗來進行其穩定性研究。ELISA實驗的具體步驟如下:1)Her2-ECD(100ng)加到96孔板的每個孔中;2)將用Anti-Her2-Mc-VC-PAB-MMAE(常規偶聯),Anti-Her2-
Di-Mc-VC-PAB-MMAE(雙馬來醯亞胺巰基偶聯)和Anti-Her2-PY-QJ2-ADC(Her2-C78,共價巰基偶聯)處理過的人外周血加到塗好的96孔板培養,以連接Her-2 ECD;3)結合在Her2-ECD抗原上的抗her2的ADCs的數量通過連有鏈黴親和素或者辣根過氧化物酶的抗人IgG的二抗來檢測,辣根過氧化物酶可以催化顯色底物鄰苯二胺轉化為有色產物。將外周血細胞培養3天后結果顯示常規巰基偶聯的ADC的降解率為26.7%,雙馬來醯亞胺巰基偶聯的ADC的降解率為18.9%,本專利中的ADC的降解率為5.1%。從表3中也可以看出本專利中的共價巰基偶聯的ADC在以上3中ADC中的降解速率最低。
實施例III-抗體偶聯藥物的活性
在一個實施例中,本專利中的抗體偶聯藥物可以被用於專門針對腫瘤細胞,並且可以結合到腫瘤細胞表面上的相關抗原。該ADC與抗原結合的複合物可以通過細胞內吞進入腫瘤細胞並形成胞內體,當胞內體中的該複合物與溶酶體融合後釋放藥物彈頭。該藥物彈頭可以抑制腫瘤細胞的主要功能或者殺死腫瘤細胞。如果該藥物彈頭釋放到腫
瘤細胞表面或者附近,該腫瘤細胞也可以以一種臨近者的方式被殺死。
因此,該專利發明不同的蛋白藥物偶聯物來抑制腫瘤細胞的生長或分化。這些複合物擁有各種活性的藥物彈頭,可以用於治療腫瘤、自身免疫性疾病和炎症甚至是腫瘤幹細胞的分化。
實施例III-1-針對腫瘤的活性
在該實施例或者專利發明中,抗體藥物偶聯物(ADC)結合了獨特的單克隆抗體和可以殺死癌細胞的細胞毒素,這使得ADC成為可以高效殺死腫瘤細胞的藥物。而且,共價巰基偶聯在本發明中的應用增加了抗體偶聯藥物的穩定性,限制了ADC在血液迴圈中的降解,從而降低它的毒性。實例(MDA-MB-231)中提供的資料就是利用前面所描述的ADC治療人類癌症,方法是裸鼠中植入人乳腺癌細胞進行試驗。
為了確定共價偶聯和常規偶聯ADC的生物學功能,同一種連接子-細胞毒素與抗Her-2的單克隆抗體進行巰基常規偶聯和巰基共價偶聯。該裸鼠中植入人的癌細胞系(MDA-MB-231),當裸鼠體內的腫瘤體積達到100cm3時,將不同濃度的ADC藥物(0,2.5,5.0 and 10mg/kg)對小鼠進行腹腔注射。腫瘤體積每3天檢測一次,21天後對小鼠進行解剖,將腫瘤分離並稱重。
表4提供了常規偶聯的ADC與巰基共價偶聯的ADC在人類乳腺癌裸鼠模型中的活性比較。
參考文献
1.Yao Xuejing, Jing Jiang, Xin Wang, Changjiang Huang, Dong Li, Kuan Xie, Qiaoyu Xu, Hongwen Li, Zhuanglin Li, Liguang Lou and Jianmin Fang, 2015 “A novel humanized anti-her2 antibody conjugated with MMAE exerts potent anti-tumor activity,” Breast Cancer Research & Treatment, 153 (1): 123-133。
2.An Deqiang, et al., 2014 07 23一種三齒型連接子及其應用CN103933575A。
Claims (62)
- 一種連接子-活性化合物偶聯物之通式I,其包含:
- 如請求項1之連接子-活性化合物偶聯物,其中X選自F、Cl、Br及I。
- 如請求項1之連接子-活性化合物偶聯物,其中R1和R2是不同的。
- 如請求項1之連接子-活性化合物偶聯物,其中M選自C-R5、N、B、P、Si-R5、芳基、雜芳基、環烷基、和雜環基烷基,其中R5選自H、C1-C6烷基、C2-C6烯基及C2-C6炔基。
- 如請求項1之連接子-活性化合物偶聯物,其中L1和L2各自獨立地選自C1-C6烷基、C2-C6烯基、C2-C6炔基、芳基、雜芳基、C3-C9環烷基、C3-C9雜環基、聚乙二醇、O、S、NR6、C(=O)、C(=O)O、C(=O)NR6、C=NR6、C(=S)O、C(=S)NR6、C(=S)S、NR6(C=O)、NR6(C=S)NR7、O(C=O)NR6、S(=O)2以及其組合,其中R6和R7獨立地選自H、C1-C6烷基、C2-C6烯基及C2-C6炔基。
- 如請求項1之連接子-活性化合物偶聯物,其中L包含不可裂解單元。
- 如請求項1之連接子-活性化合物偶聯物,其中L包含可裂解單元。
- 如請求項6或7之連接子-活性化合物偶聯物,其中至少一個L包含C1-C9烷基、C2-C9烯基、C2-C9炔基、芳香烴、雜芳基、C3-C9環烷基、C3-C9雜環基、聚乙二醇、O、S、NR8、C(=O)、C(=O)O、C(=O)NR8、C=NR8、C(=S)O、C(=S)NR8、C(=S)S、NR8(C=O)、NR8(C=S)NR9、O(C=O)NR8、S(=O)2、Val-Cit-PAB、Val-Ala-PAB、Val-Lys(Ac)-PAB、Phe-Lys-PAB、Phe-Lys(Ac)-PAB、D-Val-Leu-Lys、Gly-Gly-Arg、Ala-Ala-Asn-PAB、Ala-PAB、PAB,或其組合。
- 如請求項8之連接子-活性化合物偶聯物,其中R8和R9獨立地選自H、C1-C6烷基、C2-C6烯基及C2-C6炔基。
- 如請求項1至7中任一項之連接子-活性化合物偶聯物,其中Q選自微管蛋白結合劑、DNA烷化劑、DNA嵌入劑、酶抑制劑、免疫調節劑、顯像劑、肽類以及核苷酸。
- 如請求項10之連接子-活性化合物偶聯物,其中Q選自美登素、耳他汀、刺孢黴素、阿黴素、倍癌黴素以及吡咯並苯並二唑(PBD)。
- 一種抗體-藥物偶聯物通式如下:
- 如請求項24之抗體-藥物偶聯物,其中M選自C-R5、N、B、P、Si-R5、芳基、雜芳基、環烷基和雜環基烷基,其中R5選自H、C1-C6烷基、C2-C6烯基及C2-C6炔基。
- 如請求項24之抗體-藥物偶聯物,其中L1和L2各自獨立地選自C1-C6烷基、C2-C6烯基、C2-C6炔基、芳基、雜芳基、C3-C9環烷基、C3-C9雜環基、聚乙二醇、O、S、NR6、C(=O)、C(=O)O、C(=O)NR6、C=NR6、C(=S)O、C(=S)NR6、C(=S)S、NR6(C=O)、NR6(C=S)NR7、O(C=O)NR6、S(=O)2以及它們的任意組合,其中R6和R7獨立地選自H、C1-C6烷基、C2-C6烯基及C2-C6炔基。
- 如請求項24之抗體-藥物偶聯物,其中L包含不可裂解單元。
- 如請求項24之抗體-藥物偶聯物,其中L包含可裂解單元。
- 如請求項28或29之抗體-藥物偶聯物,其中至少一個L包含C1-C9烷基、C2-C9烯基、C2-C9炔基、芳基、雜芳基、C3-C9環烷基、C3-C9雜環基、聚乙二醇、O、S、NR8、C(=O)、C(=O)O、C(=O)NR8、C=NR8、C(=S)O、C(=S)NR8、C(=S)S、NR8(C=O)、NR8(C=S)NR9、O(C=O)NR8、S(=O)2、Val-Cit-PAB、Val-Ala-PAB、Val-Lys(Ac)-PAB、Phe-Lys-PAB、Phe-Lys(Ac)-PAB、D- Val-Leu-Lys、Gly-Gly-Arg、Ala-Ala-Asn-PAB、Ala-PAB、PAB或它們的任意組合。
- 如請求項30之抗體-藥物偶聯物,其中R8和R9獨立地選自H、C1-C6烷基、C2-C6烯基及C2-C6炔基。
- 如請求項24至29及32至42中任一項之抗體-藥物偶聯物,其中A包含單克隆抗體。
- 如請求項24至29及32至44中任一項之抗體-藥物偶聯物,其中A包含抗體片段、替代體以及變體。
- 如請求項24至29及32至44中任一項之抗體-藥物偶聯物,其中A包含蛋白質配體或者支架蛋白質。
- 如請求項24至29及32至44中任一項之抗體-藥物偶聯物,其中A包含肽。
- 如請求項24至49及32至44中任一項之抗體-藥物偶聯物,其中A 包含小分子配體。
- 一種如請求項24至44中任一項之抗體-藥物偶聯物之用途,其係用於製備用於治療受試者的病理狀態的藥物。
- 如請求項50之用途,其中疾病選自癌症,炎性疾病,自身免疫性疾病,神經系統的疾病,和心血管疾病。
- 如請求項51之用途,其中的病理狀況為癌症。
- 如請求項52之用途,其中癌症選自癌,淋巴瘤,母細胞瘤,肉瘤和白血病或淋巴惡性腫瘤。
- 如請求項53之用途,其中癌症是HER2陽性癌症。
- 如請求項54之用途,其中癌症是乳腺癌。
- 如請求項54之用途,其中靶標部分是結合HER2的抗體或其片段。
- 如請求項52之用途,其中活性化合物是細胞毒素。
- 如請求項50之用途,其中受試者是人。
- 一種體外診斷方法,其包含使用請求項24之抗體-藥物偶聯物,接觸含有所關注的被分析物的樣品,其中靶標部分選擇性地結合到關注的分析物上,Q是可檢測的實體,和/或是一個可以與一個或多個另外的實體結合的實體,這裡所說的一個或多個另外的實體是其本身,也為可檢測的實體,其中該方法包括分析樣品用於檢測可檢測的實體的存在,此實體的存在表明目標分析物存在。
- 如請求項59之方法,其中被分析物與癌症相關。
- 如請求項59之方法,其中被分析物是HER2。
- 如請求項60之方法,其中靶標部分是抗體或抗體片段。
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CN106946926A (zh) * | 2017-02-27 | 2017-07-14 | 西北大学 | 一种具有多齿氨羧类二聚体螯合剂及其制备方法、应用和分离介质 |
CA3051173A1 (en) | 2017-03-10 | 2018-09-13 | Quiapeg Pharmaceuticals Ab | Releasable conjugates |
EP3606560A2 (en) * | 2017-04-05 | 2020-02-12 | Novo Nordisk A/S | Oligomer extended insulin-fc conjugates |
CN109232464B (zh) * | 2017-07-10 | 2022-11-15 | 上海新理念生物医药科技有限公司 | 噁二唑型连接子及其应用 |
CN113651831A (zh) * | 2017-12-15 | 2021-11-16 | 四川科伦博泰生物医药股份有限公司 | 生物活性物偶联物及其制备方法和用途 |
WO2019157772A1 (zh) * | 2018-02-13 | 2019-08-22 | 和元生物技术(上海)股份有限公司 | 抗trailr2抗体-毒素-偶联物及其在抗肿瘤治疗中的药物用途 |
TW202003044A (zh) | 2018-03-09 | 2020-01-16 | 瑞典商奎亞培格製藥公司 | 可釋放之抗體結合物 |
CN110507824A (zh) * | 2018-05-21 | 2019-11-29 | 荣昌生物制药(烟台)有限公司 | 一种抗间皮素抗体及其抗体药物缀合物 |
CN112220933A (zh) * | 2018-07-03 | 2021-01-15 | 烟台迈百瑞国际生物医药股份有限公司 | 抗体-t2毒素缀合物及其用途 |
BR112021004689A2 (pt) | 2018-09-12 | 2021-06-08 | Quiapeg Pharmaceuticals Ab | conjugados glp-1 liberáveis |
CN111433188B (zh) * | 2018-12-17 | 2023-08-01 | 荣昌生物制药(烟台)股份有限公司 | 一种用于抗体药物偶联物的连接子及其应用 |
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