CN204406861U - 纳米金对胃癌的靶向热疗的教具 - Google Patents

纳米金对胃癌的靶向热疗的教具 Download PDF

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CN204406861U
CN204406861U CN201520087451.3U CN201520087451U CN204406861U CN 204406861 U CN204406861 U CN 204406861U CN 201520087451 U CN201520087451 U CN 201520087451U CN 204406861 U CN204406861 U CN 204406861U
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gold
spherical shell
stomach
gold nano
cancer cell
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任辉
史莹
刘俊宝
王丹
林巍
于晓强
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Jilin University
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Jilin University
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Abstract

本实用新型涉及一种纳米金对胃癌的靶向热疗的教具,其特征在于:主壳体中心位置布置金纳米球壳,胃癌细胞存储盒布置在金纳米球壳周围并通过纳米金棒与金纳米球壳连接,激光射灯前端投射的激光对准金纳米球壳。其通过一种简单的化学方法合成了直径为20nm的金纳米球壳,使其等离子体共振吸收峰移动到近红外区域,这种材料在808nm激光辐照下具有优良的光热转换性质,并进一步将可特异性识别胃癌细胞靶向肽与纳米金棒相连对其靶向抑制胃癌细胞的生长过程直观表现出来。有利于通过体外、体内实验结合的方法探讨纳米金结合热疗在胃癌中的作用。

Description

纳米金对胃癌的靶向热疗的教具
技术领域
本实用新型涉及一种纳米金对胃癌的靶向热疗的教具,属于一种研究纳米金对胃癌细胞的靶向抑制作用的试验教具。
背景技术
胃癌是危害人类健康的主要恶性肿瘤之一,胃癌在全世界人口的死亡原因中仍占主导地位。亚洲属胃癌高发地区,我国胃癌新发病率仍居各种恶性肿瘤第三位,死亡病例位居所有肿瘤死亡第三位。常规治疗方法为“手术+放疗+化疗”。手术治疗是首选方法,但不能有效地避免其复发;传统的放疗、化疗方法对这种低敏感性的肿瘤细胞效果不佳,难免产生因细胞坏死而导致的相应并发症。尽管近年来对胃癌的诊断和治疗手段有了很大进展,但是目前经过常规治疗,胃癌癌五年生存率仍然在30~40%左右。
随着科学家建立在纳米水平基础上利用原子和分子的集合物的独特的性质,纳米技术已经成为21世纪关键的研究领域之一。应用纳米药物结合热疗,即通过直接加热或其他形式的能量向热能转换烧死癌细胞的方法目前受到越来越多的重视,如直接热疗、磁热理疗、微波热疗,红外热疗等,已经成为当今肿瘤研究的热点。
发明内容
本实用新型的目的提供一种纳米金对胃癌的靶向热疗的教具,其通过一种简单的化学方法合成了直径为20nm的金纳米球壳,使其等离子体共振吸收峰移动到近红外区域,这种材料在808nm激光辐照下具有优良的光热转换性质,并进一步将可特异性识别胃癌细胞靶向肽与纳米金棒相连对其靶向抑制胃癌细胞的生长过程直观表现出来;有利于通过体外、体内实验结合的方法探讨纳米金结合热疗在胃癌中的作用。
本实用新型的技术方案是这样实现的:纳米金对胃癌的靶向热疗的教具,由主壳体、金纳米球壳、胃癌细胞存储盒、纳米金棒、激光射灯组成,其特征在于:主壳体中心位置布置金纳米球壳,胃癌细胞存储盒布置在金纳米球壳周围并通过纳米金棒与金纳米球壳连接,激光射灯前端投射的激光对准金纳米球壳。
本实用新型的积极效果是其具有强的红外吸收和良好的稳定性,通过体外,证实在体外纳米金棒对胃癌细胞在28.3μM,而对于连肽纳米金棒在5.31μM这个浓度下是无毒性的,是合适的作用浓度,纳米金棒在红外照射下可抑制肿瘤细胞的增殖,抑制率均可达90%以上,其教具简单,适用,使用方便,直观。
附图说明
图1为本实用新型的结构图。
具体实施方式
下面结合附图对本实用新型作进一步说明:如图1所示,纳米金对胃癌的靶向热疗的教具,由主壳体1、金纳米球壳2、胃癌细胞存储盒3、纳米金棒4、激光射灯5组成,其特征在于:主壳体1中心位置布置金纳米球壳2,胃癌细胞存储盒3布置在金纳米球壳2周围并通过纳米金棒4与金纳米球壳2连接,激光射灯5前端投射的激光对准金纳米球壳2。
纳米金棒4采用种子生长法合成,靶向修饰后得到纳米金棒长约为40nm,宽为12nm,具有强的红外吸收和良好的稳定性;采用MTT比色法检测纳米金棒4对BGC-823、HepG2、Hela细胞的毒性,结果显示纳米金棒4对BGC-823细胞在28.3μM,对HepG2细胞均在21.2μM,对Hela细胞在42.5μM的浓度下与空白对照组相比没有显著差别,对细胞是无毒性的,是合适的作用浓度,而对于纳米金棒4对BGC-823细胞在5.31μM浓度下是无毒性的,是合适的作用浓度。
激光射灯5经过金纳米球壳2、纳米金棒4在合适的作用浓度下对BGC-823、HepG2、Hela细胞进行红外照射,通过细胞活力检测结果证明纳米金棒4可抑制肿瘤细胞的增殖,抑制率均可达90%以上。在倒置显微镜下及荧光染色后观察细胞形态,结果表明在适当的照射功率下,热疗组细胞细胞核浓缩,细胞质减少,与周围细胞联系中断,细胞贴壁减少,出现细胞凋亡特征。
纳米金棒4对胃癌细胞存储盒3内的胃癌细胞的靶向抑制作用进行研究,通过细胞活力检测结果显示纳米金棒4红外热疗可特异性抑制胃癌细胞的增殖,且其抑制作用与红外照射的功率呈依赖关系,随着照射功率的增大,细胞的存活率逐渐降低。随后将纳米金棒4对胃癌细胞BGC-823、正常肝细胞HL7702及Hela细胞进行红外热疗,实验结果显示,红外照射功率为15W/cm2对HepG2细胞有显著的抑制作用,抑制率可达90%左右,而对HL7702细胞、Hela细胞未表现出明显的抑制作用,而且以相同条件用未连接靶向肽的纳米金棒4处理BGC-823细胞在该功率的红外照射下,其抑制率不到5%。

Claims (1)

1.纳米金对胃癌的靶向热疗的教具,由主壳体、金纳米球壳、胃癌细胞存储盒、纳米金棒、激光射灯组成,其特征在于:主壳体中心位置布置金纳米球壳,胃癌细胞存储盒布置在金纳米球壳周围并通过纳米金棒与金纳米球壳连接,激光射灯前端投射的激光对准金纳米球壳。
CN201520087451.3U 2015-02-09 2015-02-09 纳米金对胃癌的靶向热疗的教具 Expired - Fee Related CN204406861U (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109326190A (zh) * 2018-11-14 2019-02-12 浙江理工大学 一种模拟生物体循环的磁靶向光热治疗装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109326190A (zh) * 2018-11-14 2019-02-12 浙江理工大学 一种模拟生物体循环的磁靶向光热治疗装置

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