素衍生物对疟疾传播能力的影响
R N Price1, F Nosten, C Luxemburger
1Shoklo Malaria Research Unit, Tak Province, Thailand.
Lancet (London, England)
|June 15, 1996
概括
与梅花素相比,素衍生物显著降低了Plasmodium falciparum的细胞携带能力,降低了疟疾传播潜力. 广泛使用素衍生物可能会防止耐药疟疾的传播.
科学领域:
- 热带医学 热带医学
- 传染性疾病 传染性疾病
- 寄生虫学的寄生虫学
背景情况:
- 泰国梅花昆疗效的下降和Plasmodium falciparum雌性细胞携带的增加表明疟疾传染率的上升.
- 以前的抗疟疾药物的疗效受到抗性Plasmodium falciparum菌株的挑战.
研究的目的:
- 为了比较梅花素,黄素,素和素衍生物在降低Plasmodium falciparum类型细胞携带的疗效.
- 评估不同抗疟疾药物对疟疾传播潜力的影响.
主要方法:
- 在1990年至1995年期间进行了涉及5193名患有急性无并发性型疟疾的患者的前性研究.
- 在4-9周的随访期间,每周进行寄生虫计数,以确定性质细胞阳性和传播潜力 (PGW率).
主要成果:
- 在初级感染中,素衍生物显著降低了相对于甲floquine (PGW 34.1) 的游戏细胞携带率 (PGW 3.9).
- 与甲floquine相比,用美西宁衍生物重新治疗减少了游戏细胞携带的18.5倍.
- 在常规治疗中引入素衍生物与虫疟疾发病率减少47%有关.
结论:
- 素衍生物有效地降低了Plasmodium falciparum的传播潜力,无论影响载体种群的环境因素如何.
- 广泛采用素衍生物用于虫疟疾治疗,可以帮助预防多药耐药性的出现和传播.
- 抗疟疾药物选择显著影响疟疾传播动态和药物耐药性的发展.
相关概念视频
00:58Symbiosis
Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
01:29Malaria
Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...
01:15Anthelminthic Agents
Anthelmintic drugs differ significantly from antiparasitic therapies targeting protozoa, primarily due to differences in parasite biology. Whereas most protozoal treatments act on proliferating cells, anthelmintics are typically directed against mature, nonproliferative helminths. The therapeutic approach considers the helminth's reliance on neuromuscular coordination, glucose metabolism, and microtubular integrity for survival, reproduction, and localization within the host. Most anthelmintics...
01:21Antiprotozoal Agents
Leishmaniasis is a widespread parasitic disease caused by several Leishmania species. It affects millions of people each year and remains a major public health problem in endemic regions. First-line treatment relies on pentavalent antimonials, including meglumine antimoniate and sodium stibogluconate. Even so, how these drugs work has not been fully clear, especially their interaction with parasite-specific biochemical pathways. One key target is trypanothione reductase (TR), an enzyme that...