研究人員模擬細菌組成中,,一種可以刺激免疫系統(tǒng)的分子,,在這種分子的協(xié)助下,成功地利用癌癥疫苗延遲和防止小鼠的乳房腫瘤,。這項策略有助于利用勝肽疫苗減少高風險女性發(fā)生乳癌的機率,。
研究人員利用一種名為類鐸受體促效劑(toll-like receptor agonist)的物質,幫助合成的勝肽疫苗增加免疫系統(tǒng)對于乳癌腫瘤之反應,。同時,他們使用抗CD25 抗體抗體鈍化其它可能干擾T 細胞反應的免疫反應,,以改進疫苗的效果,。
根據(jù)這篇發(fā)表于2月1 日Cancer Research的報告,研究人員表示他們的戰(zhàn)略可以有效地防止基因轉植小鼠發(fā)生乳癌,,即使將疫苗給予早期乳癌小鼠,,也可以產生這樣的效果。
研究人員認為這種還在動物實驗階段的療法,,可以造福發(fā)生乳癌風險較高的女性,,例如帶有乳癌相關基因,或家族中有其它女性成員罹患乳癌的女性,。雖然勝肽疫苗可以有效地防止小鼠之自發(fā)性腫瘤,,但是必須重復地注射,因為一旦出現(xiàn)腫瘤,,只有某些小鼠對于疫苗有反應,。
(資料來源 : Bio.com)
英文原文摘要:
Breast Cancer: Should Gastrointestinal Bacteria Be on Our Radar Screen?
Varada P. Rao1, Theofilos Poutahidis1,2, James G. Fox1 and Susan E. Erdman1
1 Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, Massachusetts and 2 Laboratory of Pathology, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
Requests for reprints: Susan E. Erdman, Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA 02139. Phone: 617-252-1804; Fax: 617-258-5708; E-mail: [email protected] .
Anti-inflammatory drugs and antibiotics alter the risk of breast cancer in women, but roles for bacteria and inflammation in breast malignancies are poorly understood. A recent study in mice suggests that intestinal bacteria can trigger mammary carcinoma. The mechanisms involved in this effect suggest that dysregulated host immune responses to enteric bacteria can influence the development of extraintestinal cancers, highlighting the opportunities for prevention and treatment aimed at promoting intestinal homeostasis. [Cancer Res 2007;67(3):847–50]
更多英文原文鏈接:http://cancerres.aacrjournals.org/cgi/content/abstract/67/3/847