CN102325537B - 免疫抑制相关疾病的治疗药物 - Google Patents
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Abstract
本发明揭示似胚叶细胞-干细胞在制备用于治疗多种免疫不全症的药物中的用途。
Description
技术领域
本发明系有关于细胞增生疾病及免疫不全症的治疗方法。
背景技术
免疫系统可使一生物体抵御病原菌感染、细胞转型(cellular transformation)以及物理或化学性伤害。一旦免疫系统较平常不活化,会发生免疫不全(immunodeficiency)或免疫抑制(immunosuppression)而导致危急生命的感染或癌症的发生。免疫抑制可能由疾病所造成,或由药物,或感染所产生。已知系统性免疫抑制与不正常的骨髓形成(myelopoiesis)及继发的肿瘤生长、骨髓抑制(myelosuppressive)疗法、及生长因子的使用和随后的骨髓衍生免疫抑制细胞的扩增/调动有关。该骨髓衍生抑制细胞(MDSCs,myeloid-derived suppressor cells)通过多种机制以减少活化的T细胞的数量,以及抑制T细胞的功能,因此导致免疫抑制及耐受性(tolerance)。因此,MDSCs具有原肿瘤(pro-tumor)的角色。此外,MDSCs具有多效活性(pleiotropic activities),其包含可于肿瘤微环境中诱导突变、促进血管新生作用(angiogenesis)及转移(metastasis),以及直接支持肿瘤生长及发炎反应。实际上,该等细胞于多种病理情况中系会增加,包含感染、炎症、移植物抗宿主疾病(graft-versus-host disease)、创伤压力、及肿瘤疾病(Dolcetti et al.,Cancer Lett.2008 Aug 28;267(2):216-25;Talmadge,Clin Cancer Res.2007 Sep 15;13(18 Pt 1):5243-8)。
发明内容
本发明至少部份系基于非预期地自成熟或年轻动物中发现一干细胞群,似胚叶细胞-干细胞群(BLSCs,blastomere-like stem cells),其可显著地降低动物体内的MDSCs的数量。
因此,本发明一方面的特征在于一种治疗患者中细胞增生疾病的方法。该方法包含将有效量的BLSCs投予有需要的个体。
细胞增生疾病系指一疾病具有不受控制的自发性细胞生长(包含恶性及非恶性生长),以及受MDSCs调节免疫抑制作用的特征。该疾病的例子包含大肠癌、乳癌、前列腺癌、肝癌、黑色素瘤、肺癌、神经胶母细胞瘤、脑瘤、造血性恶性肿瘤、视网膜胚细胞瘤(retinoblastoma)、肾细胞癌、头部或颈部癌、子宫颈癌、胰脏癌、食道癌、卵巢癌,及鳞状上皮细胞瘤。
在本文中「个体」一词系指人类或非人类的动物。非人类的动物的例子包含所有具有免疫系统的脊椎动物,如:哺乳类动物,包括非人类的灵长类(特别系指高等灵长类)、狗、啮齿动物(如小鼠或大鼠)、天竺鼠、猫、农场动物(如马、牛、羊或猪),以及非哺乳类动物,包括鸟类、两栖动物、爬虫类等。在一较佳具体实施例中,该个体为人类。在另一具体实施例中,该个体为试验动物或适用于疾病模式的动物。
待治疗的患有细胞增生疾病的个体,可由针对该疾病的标准诊断技术来鉴定。在本文中「治疗」一词系指将组成物(例如细胞组合物)投予罹患细胞增生疾病或有发展成细胞增生疾病的风险的个体,其目的为对于该疾病、该疾病的症状、衍生自该疾病的症状或倾向损伤/疾病的体质加以治愈、减轻、解除、治疗、延迟其发生、预防或缓解。在本文中「有效量」一词系指能使被治疗的个体产生预期的医疗结果的组合物的量。该治疗方法可单独进行或与其它药物或疗法并行。
本发明的特征亦在于一种减少个体内MDSCs数量的方法,其通过将有效量的BLSCs投予有需要的个体。
本发明另一方面的特征为一种克服个体内免疫抑制作用的方法。该方法包含将有效量的BLSCs投予有需要的个体。该免疫抑制作用为由MDSCs调节的免疫抑制作用。在又另一方面,本发明的特征在于一种调节个体内免疫反应的方法。该方法包含将有效量的BLSCs投予有需要的个体。
于前述的每一种方法中,该个体可为具有细胞增生疾病、感染或免疫不全疾病的患者。于每个方法中,该BLSCs以每次1x 108至1x 1011的量投予该患者,较佳为每次5x 108至5x 1010,或更佳为每次1x 109至1x 1010。为了减少或避免宿主排 斥反应,该等细胞较佳者为自该个体自体衍生者。该BLSCs可为每两周投予2至5次,或更佳者,为每两周投予3次。该个体可视需要于投予该BLSCs前先检测MDSCs的数量。若一来自该个体的样本,其MDSCs数量系统计上高于来自正常受试者的样本,则该个体为前述方法的治疗候选。该个体亦可于投予该BLSCs后检测MDSCs的数量,以确认投予该BLSCs的效用。例如:若经投予后该MDSCs的数量统计上低于投予前者,则该BLSCs的投予治疗为有效。
本发明的一或多个具体实施例的细节系阐述于后文中。本发明的其它特征、目的以及优点可通过说明书内容及权利要求得以清晰明了。
具体实施方式
本发明系关于使用BLSCs调节免疫反应及治疗相关疾病,例如细胞增生疾病及其它免疫不全症。
BLSCs为在成年或年轻动物中的一群非胚胎干细胞。此等细胞为全能性且具有与胚胎干细胞相似的分化能力。参见WO2007/100845。BLSCs包含正常的整套染色体,且BLSCs为细胞谱系未定(lineage-uncommitted),且可形成体内所有体(非生殖)细胞。它们可分化为各种细胞谱系,其包含衍生自外胚层(如:神经元、星状胶细胞、寡树突神经胶细胞(oligodendrocytes)及角质细胞(keratinocytes))、中胚层(如:骨骼肌、平滑肌、心肌、脂肪组织、软骨、骨、真皮、血液细胞、韧带组织(ligament tissue)、肌腱及内皮细胞)及内胚层(如:GI上皮细胞、肝细胞、卵细胞、胆细胞、胰细胞(如α细胞、β细胞及γ细胞)及管道细胞(ductal cells))的细胞。此外,BLSCs可分化为精原细胞(spermatogonia)及形成生殖配子精子及/或卵子,及胚胎组织和细胞,以及胎盘的胎儿部分。该细胞易对于谱系诱导剂、增生剂及分化抑制剂产生反应。另一方面,该等细胞对于发展剂(progression agents)较无反应。与似外胚层干细胞(epiblast-like stem cells)相同,BLSCs于细胞培养至长满时并无接触抑制作用,但只要该细胞被维持于适当的营养供给时,则会形成多层融合的细胞层。BLSCs不会表现代表前驱或分化细胞、胚层谱系干细胞、或似外胚层干细胞的表型表现标记。相反地,BLSCs表现一般及特定的胚胎谱系标记,例如:胚胎干细胞标记CD66e、HCEA、CEA以及CEA-CAM-1。BLSCs于成熟组织中常为静态。然而,当上述组织受到伤害时,BLSCs便会活化及分化以修复该受损的组织。
BLSCs可通过下述的实施例1或专利申请号WO2007/100845所述的方法来制备。一般而言,该细胞可自成年或年轻动物的多种组织中分离出来,包含血液、骨髓及骨骼肌。为了确认所分离的细胞确实为BLSCs,试验者可检验一些特征,包含(1)悬浮的细胞尺寸,其小于1微米;(2)细胞表面标记,如CD66e+;以及(3)台盼蓝染色呈阳性。细胞表面标记的抗体,如CD66e可被使用于鉴定BLSCs。为此目的,适当的抗体可与适当的标记结合,如:萤光异硫氰酸盐(FITC,fluorescein isothiocyanate)、藻红蛋白(PE,phycoerythrin)、别藻蓝蛋白(APC,allophycocyanin)或量子点(quantum dots)。BLSCs可进一步使用该类抗体并以流式细胞仪来富集。
该富集的细胞群接着以标准技术来测试。为了确认该细胞的分化潜力,该细胞可通过习知技艺方法被诱导以形成,例如:神经元-神经胶质细胞、骨细胞以及脂肪细胞。例如,该细胞可被继代及培养至长满(confluence),移转至骨生成培养基或脂肪生成培养基,并培养一段适当时间(如:三周)。请参阅如:美国专利第7470537号、第7374937号及第6777231号。骨生成分化能力可通过钙累积的矿化作用来评估,该矿化作用可通过von Kossa染色法观察。通过油红O将细胞内油滴染色,并于显微镜下观察以检测脂肪生成分化情形。对于神经分化方面,该细胞可于神经生成培养基中培养适当时间(如七天),接着将其以无血清(serum depletion)的环境处理,并与β-巯基乙醇(β-mercaptoethanol)培养。请参阅美国专利第7470537号及美国专利申请案第20080274087号、第20080213228号及第20080152629号。经分化后,该细胞呈现折光细胞体型态(refractile cell body),及具有延伸的似轴突结构并构成网络。以谱系特异性标记进行免疫细胞化学染色即可进一步确认神经的分化情形。该标记的例子包含神经元特异性第三类β-微管蛋白(Tuj-1)、神经丝状结构蛋白(neurofilament)以及GFAP。
另外,可通过BLSCs不具接触抑制作用(contact inhibition)的特点,以确认该等分离细胞的身份。为此,可将该分离细胞培养至长满。于此条件下,BLSCs可形成球状细胞聚体、细胞均布的多层结构(multiple confluent layers)、或网孔(mesh-net)结构。相反的,CD42+细胞或血小板无法形成前述结构,如细胞聚体。
经该等确认后的BLSCs可进一步于一非分化性的培养基中以超过10、20、50、100或300代以上的细胞倍增率(population doubling)来培养增殖,且其中无自发性分化、老化、型态改变、生长速度增加、或改变为具能力分化为神经元的迹象。该等细胞可于使用前以标准方法来保存。如本文所述,BLSCs可被用以降低个体内 的MDSCs的数量。
此处所使用的「MDSCs」一词系指自骨髓衍生的、异质的细胞群,其包含骨髓单核细胞性分化的连续性阶段。此等异质性系可通过复杂的表面标记(surface marker)表现模式来反映。鼠类MDSCs的主要表现型系可由下述标记来界定:CD11b+、Gr-1+、F4/80int、CD11clow、MHCII-/low、Ly-6C+、ER-MP58+、CD31+以及IL-4Rα+。人类MDSCs为未成熟的表现型,包含谱系阴性(Lin-,lineage negative)、CD14-、人类白血球抗原DR-阴性(HLA-DR-,human leukocyte antigen DR-negative)、CD15+、CD34+、CD11b+、CD33+、以及CD13+(Dolcetti et al.,Cancer Lett.2008 Aug 28;267(2):216-25;Talmadge,Clin Cancer Res.2007 Sep 15;13(18Pt1):5243-8)。
带有肿瘤的动物及癌症患者的骨髓形成(myelopoiesis)存在缺陷,此将导致MDSCs的累积。肿瘤成长的期间,于主要发炎类型中,MDSCs不论在局部性或系统性皆会被吸引且帮助肿瘤的成长。该等细胞会维持肿瘤成长并提供有利于转型细胞(transformed cells)增生、产生新突变、扩增及规避宿主的免疫监督(immunosurveillance)的微环境;此外,MDSCs会参与肿瘤血管新生(neoangiogenesis)。
因此,BLSCs所调节的MDSCs抑制作用,系可用于治疗癌症及其它细胞增生疾病。尤其是,其可被用于治疗具有不正常高量MSDC的疾病。此处所使用的「癌症」一词系指特征为无法控制细胞生长、侵入和具有转移的可能性的疾病。癌细胞具自发性生长的能力,例如:不正常地快速细胞生长。该词意欲包含所有类型的癌化生长或致癌过程、转移组织或恶性转型细胞、组织或器官,不论组织病理类型或侵入阶段。癌症的范例包含,但不限于,癌及肉瘤,如:白血病、肉瘤、骨肉瘤、淋巴瘤、黑色素瘤、神经胶质瘤、嗜铬性细胞瘤、肝癌、卵巢癌、皮肤癌、睪丸癌、胃癌、胰脏癌、肾癌、乳癌、前列腺癌、大肠癌、头部或颈部癌、脑癌、食道癌、膀胱癌、肾脏皮质癌、肺癌、支气管癌、子宫内膜癌、鼻咽癌、子宫颈癌或肝癌、及其它原发部位不明的癌症。
MDSCs已于病理学中被揭示,但未被揭示在肿瘤中,其参与了发炎免疫反应,如超级抗原刺激(super-antigen stimulation)及感染,如睡眠虫(trypanosomiasis)、沙门氏杆菌(salmonellosis)及念珠菌(candidiasis)。例如:MDSCs数量的增加被发现与发 炎、感染及移植体对抗宿主疾病有关,且会抑制活跃或新的T细胞反应(Talmadge,Clin Cancer Res.2007 Sep 15;13(18Pt 1):5243-8)。MDSCs已显示可诱导免疫抑制状态,其系通过降低活化的T细胞数量及通过多种机制抑制T细胞功能,该等机制包含通过精胺酸酶-1(arginase-1,ARG1)以耗尽左旋精胺酸(L-arginine),以及通过诱导性一氧化氮合成酶(inducible nitric oxide synthase)产生一氧化氮、活性氧化物,和活化的氮氧化物。因此,BLSCs所调节的MDSCs抑制作用亦可能用于让MDSCs消除的开发中的策略,以治疗移植体对抗宿主疾病、发炎及自体免疫疾病,而不仅是用于治疗肿瘤。
本发明的范畴为一种用以治疗个体中MDSCs导致的免疫不全症,舒缓该疾病的症状,或延迟该疾病的发生。该疾病的一示例为细胞增生性疾病。可通过标准技术来诊断其状况或疾病以鉴定出需被治疗的个体。尤其是,若该个体体内的MDSCs数量系统计上高于同一个体先前的MDSC数量时,或高于一正常个体时,可认定为需治疗的个体。该治疗方法需将有效量的前述BLSCs投予至一需治疗的个体。
因此,本发明提供含有BLSCs的医药组合物。该等医药组合物可通过混合一治疗有效量的BLSCs,及视需要的其它活性物质,及一医药可接受的载剂来制备。该载剂可依据投予路径具有不同形式。其它活性物质的例子包含可抑制MDSCs的免疫抑制活性、干扰MDSCs的聚集,或改善身体免疫功能的化合物。
前述医药组合物可通过常规的医药赋形剂及制备方法以制备。所有赋形剂皆可与崩解剂、溶剂、粒化剂、保湿剂及黏合剂进行混合。本文所述的「有效量」或「治疗有效量」一词系指可使得特定疾病的至少一症状或参数得以显著地改善的数量。BLSCs的治疗有效量可由习知方法所决定。用以治疗疾病的有效量系可通过该领域具有通常技艺者以习知试验方法轻易地决定。而用以投予至个体的确切数量将依照该疾病的情况及严重度,以及该个体的生理情况而有所不同。任何症状或参数的显著地改善系可由熟谙该技艺者或病患对医师的报告来决定。将被明了的是,前述疾病的任何症状或参数具任何临床上或统计上显著减弱或改善者皆隶属本发明的范畴内。临床显著地减弱或改善意指对于该病患及/或医师为显而易见的。
在本文中「医药可接受的」一词系指当投予至一人类时,该等组成物中的分子个体及其它成分为生理上可接受的,且一般不会产生不良反应。较佳地,「医药可接受的」一词意指系受联邦监管机关或州政府核准,或列于美国药典或于其它一般 药典所认可用于哺乳类动物,特别指人类。医药可接受盐类、酯类、酰胺,以及前驱药系指该些盐类(如:羧酸盐、胺基酸添加盐)、酯类、酰胺,以及前驱药,于可靠的医疗判断范畴内,适合使用于与病患组织接触而无过渡毒性、刺激性、过敏反应等;且需考量该等用途的合理的利益/风险比及有效性。
可应用于前述医药组合物的载剂包含稀释剂、赋形剂或载体,其可与化合物一起被投予。该等医药载剂可为无菌的液体,例如水及油。较佳的载剂为水或水溶液、盐液及液态葡萄糖和甘油溶液,特别可作为注射溶液。适用的医药载剂如由E.W.Martin所撰的″Remington′s Pharmaceutical Sciences″第18版中所描述。
该等BLSCs可透过注入或注射(例如:静脉注射、鞘内注射、肌肉注射、腔内注射、气管内注射、腹腔注射或皮下注射)、口服、皮肤穿透或以其它业内已知方法投予一个体。于一示例中,该等细胞可被直接注射于一位置或于一组织中(如:肝脏或胰脏),该处系具有肿瘤或免疫抑制反应发生。投予可为每两周一次、一周一次或更频繁,但当该疾病或失调于一稳定阶段时,其投予频率则可以减少。
异源的及自体的BLSCs皆可被使用。于前者情况,HLA的吻合将可避免或降低宿主的反应。于后者情况,自体的BLSCs系从一个体中被纯化及增生后进行保存以备用。宿主的BLSCs可于活体外培养在含有宿主细胞或移植T细胞的环境中,并重新被送回该宿主。上述步骤可使BLSCs于该宿主内被视为自体细胞,并较佳地降低T细胞活性。
剂量和投予频率将取决于临床症状,其确认缓解阶段的维持,或于急性期的至少一个或多个,较佳为多于一个的本领域技术人员所知的临床症状被减少或消失。一般而言,剂量和用药频率将部分取决于疾病状况或失调的病理症状及临床和亚临床症状经前述组成物治疗后的削弱情形。如本领域熟谙技艺者所知悉,剂量和投予途径可依据被治疗的病患或哺乳类个体的年龄、性别、身体状况,以及共轭利益和副作用来调整。
据报告指出,MDSCs于一肿瘤处进行聚集,系可能由多种不同的肿瘤衍生可溶性因子(tumor-derived soluble factors)所触发,其影响骨髓形成、骨髓细胞调动及其活化甚巨(Dolcetti et al.,Cancer Lett.2008 Aug 28;267(2):216-25)。全能性或多能性干细胞(如BLSCs)可能干扰MDSCs的活化或迁移或促进MDSCs的分化,以克服MDSCs所调节的免疫抑制作用。
因此,全能性或多能性干细胞,除了BLSCs外,亦可被用于治疗前述具有MDSCs累积的特征的免疫。该等全能性或多能性干细胞的示例包含由上述BLSCs所衍生的细胞,例如SBR细胞及SBT细胞,该等细胞系通过将该BLSCs分别与维生素A酸(RA,retinoic acid)及转形生长因子β(TGF-β,transforming growth factor beta)共同培养所衍生。该等全能性或多能性干细胞的示例亦包含胚胎干细胞(ES细胞,embryonic stem cells)、附着的BLSCs(aBLSCs,adherent BLSCs)、过渡的BLSCs(trBLSCs,transitional BLSCs),以及似上胚叶干细胞(ELSCs,epiblast-like stem cells),如WO2007/100845所述。因此,本发明的范畴为使用该全能性或多能性干细胞以治疗前述的免疫不全症的方法。
治疗策略系基于来自于成熟或年轻动物的干细胞,例如:BLSCs,其拥有许多超越胚胎干细胞(ES)的优点。首先,通过提供良好的标记,BLSCs易于从成熟或年轻动物的组织中取得。第二点,可从血液中取得大量的BLSCs(超过2x 108/毫升)。第三点,BLSCs易于被维持及扩增,且可被诱导分化为特定谱系的细胞。第四点,BLSCs一旦注入于一个体体内不会发展为畸胎瘤(teratoma),因此,亦较ES细胞更为安全。最后同样重要的是,取得及使用BLSCs不会涉及操作或杀害胚胎,及相关的道德议题。
以下具体的实施例仅供示例说明,非用以限制未于本发明揭示者。无需进一步详细阐述,相信本领域熟谙技艺者可基于本文的说明,将本发明发挥至极限。
实施例一 BLSCs的分离
用于活化、纯化及扩增BLSCs的方法系已揭示于专利申请案,申请号为WO/2007/100845。于本实施例中,BLSCs系自人类血液中以两种方法纯化而得,血浆分段法(plasma fraction method)及溶血法(hemolysis method)。
简言之,血浆分段法系使用标准方法于第一人类个体取得全血样本(1毫升)。该样本接着被储存于4℃约7-9天,再以专利申请案WO/2007/100845所述的方式从该样本中使BLSCs增生。
该溶血法系以专利申请案WO/2007/100845所述的方式以取得一溶血片段(hemolysis fraction)。简言之,从第二人类个体中取得约1毫升的全血并储存于约 4℃、含EDTA或其它钙离子复合剂(Ca2+ complexing agents)的运输培养基(transport medium)(如:Moraga培养基,其目录编号:MBC-HUB-MED-100- A004,加州洛杉矶Moraga生技公司)中约9天。9天后,以约50毫升的灭菌后溶血溶液(如:MBC-ASB-REBG-900A-001)将全血样本中的红血球进行溶解。经离心后(如:于1800xg,10分钟),细胞碎片及溶解后细胞被移除,将细胞沈淀物重新悬浮于Moraga灭菌重组(reconstitution)溶液中(MBC-ASB-REBG-900A-002)。
前述两种细胞群系使用FITC标记的抗CD10抗体、PE标记的抗CD66e抗体、APC标记的抗CD90抗体,以流式细胞仪进行分析。结果整理于表1中。
表1
如表1所示,当使用溶血法时,约有5.81%、66.67%、及3.11%的分离细胞系分别为BLSCs(CD10-CD66e+)、过渡的BLSCs(trBLSCs,CD10+CD66e+)及似胚叶细胞-干细胞(ELSCs,CD10+CD66e-)。约有0.62%、13.65%及55.13%的细胞分别为CD10-CD90+、CD10+CD90+(过渡的似上胚叶干细胞(trELSCs)),以及CD10+CD90-。BLSCs可基于其标记(CD10-CD66e+)进一步富化。该方法的产率约200x 106BLSCs/毫升血液。
当使用血浆分段法时,约有为9.14%、2.99%及1.10%的分离细胞系分别为BLSCs、过渡的BLSCs及ELSCs。约有9.8%、2.2%及1.46%的细胞系分别为CD10-CD90+、CD10+CD90+(trELSCs)、CD10+CD90-。该方法的产率约239x 106BLSCs/毫升血浆。
该BLSCs为台盼蓝(trypan blue)染色阳性,且其大小一般小于1微米,此点不同于血小版(CD42+且台盼蓝染色阴性)。尤其是,与血小板不同的是,血小板缺乏细胞核,且不会增生及分化,而BLSCs可以如专利申请案WO/2007/100845所述的方式于培养基中增生并维持未分化状态扩增。BLSCs缺乏接触抑制作用,其可形成球状的细胞聚体、细胞均布的多层结构及网孔(mesh-net)结构。该等细胞的聚集将可导引细胞型态变化。相反地,CD42+细胞或血小板不会形成前述结构,如细胞聚体。
该BLSCs接着以专利申请案WO/2007/100845所述的方法或其它业内已知方法进行其分化能力的测试。可观察到的是,于习知诱导条件下,该等细胞可分化为多种细胞谱系,其包含该些源自外胚层、中胚层、内胚层及精原细胞的细胞谱系。该等细胞可维持未分化状态及扩增超过300代,且不会失去其分化能力。该等细胞不会形成畸胎瘤。
实施例二 BLSCs的活体内活性
BLSCs系根据上述方法从人类个体中被纯化出来,并以1x 109细胞量自体投予给同一个体。于投与后第0、14及28天,从该个体采取血液样本。接着以细胞计数分析法检测血液中MDSCs及调控T细胞(Treg)的量。可发现到分别于第0、14及28天,MDSCs(CD14-CD33+CD11b+Lin-)的数量分别占总周边血液单核细胞(PBMC,peripheral blood mononuclear cells)的9.24%、2.19%及0.35%。此结果指出BLSCs可显著地降低于该个体的MDSCs的数量,因此可用以治疗具有MDSCs相关免疫不全症的患者。
其它具体实施例
所有于本说明书所揭露的特征系可以任何组合方式组合。于本说明书中所揭露的每一特征可通过另一相同、等效、或相似目的的可替换特征来置换。因此,除非 明确声明,否则每一揭露的特征仅为各种等效或相似特征的一般系列的示例。
于前述说明中,该领域熟谙技艺者可轻易确认本发明的必要技术特征,在无脱离其精神及范围下,可对本发明进行各种不同改变及修改以使其适用于各种不同的用途及情况。因此,其它的具体实施例亦在以下权利要求的范畴内。
Claims (17)
1.似胚叶细胞-干细胞在制备用于减少一个体中骨髓衍生抑制细胞数量的药物中的用途。
2.如权利要求1所述的用途,其特征在于,该似胚叶细胞-干细胞系投予该个体每次1x108至1x1011的量。
3.如权利要求2所述的用途,其特征在于,该似胚叶细胞-干细胞系每次投予该个体5x108至5x1010的量。
4.如权利要求3所述的用途,其特征在于,该似胚叶细胞-干细胞系投予该个体每次1x109至1x1010的量。
5.如权利要求4所述的用途,其特征在于,该似胚叶细胞-干细胞每两周投予该个体2至5次。
6.如权利要求5所述的用途,其特征在于,该似胚叶细胞-干细胞每两周投予该个体3次。
7.如权利要求1所述的用途,其特征在于,似该胚叶细胞-干细胞系自体移殖自该个体。
8.如权利要求1所述的用途,其特征在于,该减少进一步包含于似胚叶细胞-干细胞投予该个体之前或之后,测定该个体内的骨髓衍生抑制细胞的数量。
9.似胚叶细胞-干细胞在制备用于克服一个体内受骨髓衍生抑制细胞调节的免疫抑制作用的药物中的用途。
10.如权利要求9所述的用途,其特征在于,该免疫抑制作用系由骨髓衍生抑制细胞所造成的免疫抑制作用。
11.如权利要求9所述的用途,其特征在于,该似胚叶细胞-干细胞系投予该个体每次1x108至1x1011的量。
12.如权利要求11所述的用途,其特征在于,该似胚叶细胞-干细胞系投予该个体每次5x108至5x1010的量。
13.如权利要求12所述的用途,其特征在于,该似胚叶细胞-干细胞系投予该个体每次1x109至1x1010的量。
14.如权利要求9所述的用途,其特征在于,该似胚叶细胞-干细胞每两周投与该个体2至5次。
15.如权利要求14所述的用途,其特征在于,该似胚叶细胞-干细胞每两周投与该个体3次。
16.如权利要求9所述的用途,其特征在于,该似胚叶细胞-干细胞为自体移殖自该个体。
17.如权利要求9所述的用途,其特征在于,该克服进一步包含于似胚叶细胞-干细胞投予该个体之前或之后,测定该个体内的骨髓衍生抑制细胞的数量。
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