Atovaquone, chloroquine, primaquine, quinine and tetracycline: antiproliferative effects of relevant antimalarials on Neospora caninum.

Neospora caninum is an apicomplexan parasite that causes abortion in cattle, resulting in significant economic losses. There is no commercial treatment for neosporosis, and drug repositioning is a fast strategy to test possible candidates against N. caninum. In this article, we describe the effects of atovaquone, chloroquine, quinine, primaquine and tetracycline on N. caninum proliferation. The IC50 concentrations in N. caninum were compared to the current information based on previous studies for Plasmodium and Toxoplasma gondii, correlating to the described mechanisms of action of each tested drug. The inhibitory patterns indicate similarities and differences among N. caninum, Plasmodium and T. gondii. For example, atovaquone demonstrates high antiparasitic activity in all the analyzed models, while chloroquine does not inhibit N. caninum. On the other hand, tetracycline is effective against Plasmodium and N. caninum, despite its low activity in T. gondii models. The repurposing of antimalarial drugs in N. caninum is a fast and inexpensive way to develop novel formulations using well-established compounds.

Palliative Care and Human Rights: A Decade of Evolution in Standards.

CONTEXT: Human rights standards to address palliative care have developed over the last decade. OBJECTIVES: This article aims to examine key milestones in the evolution of human rights standards to address palliative care, relevant advocacy efforts, and areas for further growth. METHODS: The article provides an analysis of human rights standards in the context of palliative care through the lens of the right to health, freedom from torture and ill treatment, and the rights of older persons and children. RESULTS: Significant developments include the following: 1) the first human rights treaty to explicitly recognize the right to palliative care, the Inter-American Convention on the Rights of Older Persons; 2) the first World Health Assembly resolution on palliative care; 3) a report by the UN Special Rapporteur on Torture with a focus on denial of pain treatment; 4) addressing the availability of controlled medicines at the UN General Assembly Special Session on the World Drug Problem. CONCLUSION: Development of human rights standards in relation to palliative care has been most notable in the context of the right to health, freedom from torture and ill treatment, and the rights of older persons. More work is needed in the context of the rights of children, and human rights treaty bodies are still not consistently addressing state obligations with regards to palliative care.

Synergic in vitro combinations of artemisinin, pyrimethamine and methylene blue against Neospora caninum.

Neospora caninum is a member of Apicomplexa phylum, the causative agent of neosporosis. The neosporosis combat is not well established and several strategies related to vaccine, chemotherapy and immune modulation are under development. In this work, we evaluated the effects of artemisinin (Art), methylene blue (MB) and pyrimethamine (Pyr) alone or associated, on N. caninum proliferation and elimination using LacZ tagged tachyzoites. The reactive oxygen species (ROS) production after incubation with Art were also performed. Our results indicate that combinations of classical antimalarial drugs improve the parasite control, allowing the use of three drugs in a single dose. Additionally, artemisinin demonstrated distinct ROS production patterns in intra and extracellular N. caninum forms. The drug repurposing appears as a suitable approach, allowing a fast and safe method to evaluate old drugs but novel candidates against neosporosis.

Evaluation of methylene blue, pyrimethamine and its combination on an in vitro Neospora caninum model.

Neospora caninum is an apicomplexan parasite strongly related to reproductive problems in cattle. The neosporosis control is not well established and several fronts are under development, predominantly based on immune protection, immunomodulation and chemotherapy. The use of anti-malarial drugs as therapeutic sources has, in theory, considerable potential for any apicomplexan. Drugs such as methylene blue (MB) and pyrimethamine (Pyr) represent therapeutic options for malaria; thus, their use for neosporosis should be assessed. In this work, we tested the effects of MB and Pyr on N. caninum proliferation and clearance, using LacZ-tagged tachyzoites. The drugs inhibited at nanomolar dosages and its combination demonstrated an antagonistic interaction in proliferation assays, according to the Chou and Talalay method for drug combination index. However, the drug combination significantly improved the parasite in vitro clearance. The repositioning of well-established drugs opens a short-term strategy to obtain low-cost therapeutics approaches against neosporosis.

Palliative care and human rights in patient care: an Armenia case study.

This paper examines palliative care within the human rights in patient care framework, which clarifies state obligations and addresses the rights of both patients and providers. In the context of palliative care, these rights extend beyond the right to health and include patient rights to freedom from torture, cruel and inhuman treatment, non-discrimination and equality, bodily integrity, privacy and confidentiality, information, and right to a remedy. They also encompass provider rights to decent working conditions, freedom of association, and due process. The paper then looks at a case study of Armenia, acknowledging how the government's commitment to palliative care, combined with awareness raising and advocacy by human rights organizations, created an enabling environment for the realization of human rights in patient care in the context of palliative care.