help cell中文什么意思

例句与用法

1. ll prime ph : powerful oxygen catalyst that helps cells to perform optimally
   强力氧气催化剂，帮助细胞达到最佳状况。
2. in large amounts it is toxic, but in trace amounts it enables organisms to produce enzymes that help cells to function
   大剂量时是毒物，但在微量是它能使有机体生成能量使细胞发挥功能。
3. they're a rich form of selenium, a trace mineral that convinces cancer cells to commit suicide and helps cells repair their dna
   这样的沙拉富含硒（一种矿物质元素能够杀死肿瘤细胞并帮助细胞修复其dna）。
4. in this new study, they have identified four genes in particular that work together to help cells from the primary site to settle at a new site and grow
   在这项新的研究中，他们已经鉴定出四个特殊的基因，它们协同作用使肿瘤细胞由原位转移定居在新的位点并生长。
5. at present, in an attempt to stimulate specific antitumor immunity, experimental models and clinical studies are currently evaluating the potent antigen-presenting capacity of dc combined with single or multiple tumor antigen epitopes . however, there are several problems in utilizing pulsing dc with synthetic immunodominant peptides from identified antigens . 1 ) the potential induction of tolerance; 2 ) the need to determine the patient's hla haplotype, the limitation of therapy to patients whose tumors express defined specific tumor antigens in the context of the correct hla phenotype, the unavailability of peptides for all hla haplotypes; 3 ) the lack of cd4 help cell-related epitopes for most antigens; and 4 ) the ctl resulting from such protocols have a good in vitro capacity to kill peptide-pulsed target cells but only a modest capacity to kill tumor cells
   但是，学者们发现这一疗法存在着如下的缺陷：单一ctl表位抗原肽的应用其抗肿瘤作用弱于多种肿瘤抗原的联合应用，且有诱导免疫耐受的潜在危险，有时反而会促进肿瘤的生长；事先需对患者的hla单倍型进行鉴定，以确定ctl表位与hla单倍型是否匹配，目前尚缺乏能与所有hla单倍型相匹配的ctl表位，从而限制了这一疗法的应用；这一疗法所产生的ctl在体外能有效杀伤经肿瘤抗原肽共孵育过的靶细胞，但对肿瘤细胞的杀伤能力较弱：这种l表位抗原肽缺乏cd4汀h细胞相关的表位，因此，不能诱导有效的th细胞免疫应答。