There are more than 498,563 clinical trials published worldwide with over 60,000 trials that are currently either recruiting or not yet recruiting. Use our filters on this page to find more information on current clinical trials or past clinical trials (free or paid) for study purposes and read about their results.
In recent years, immunotherapy research has made great progress, especially the immunocheckpoint inhibitors represented by anti-pd-1 antibody have shown good efficacy in the treatment of malignant tumors, and some patients can achieve long-term survival. However, despite the encouraging clinical data, only a small number of people have benefited. Therefore, how to further improve the efficacy of immunotherapy and expand the benefit population has become the focus of this field. The applicant was previously published in Oncoimmunology (2017; E1331807) pointed out in the above article: MDSC is a group of immunosuppressive cells, the number of this group of cells in the body of cancer patients is more than normal, its presence affects the proliferation, activation and function of T cells, is one of the important factors affecting the efficacy of immunocheckpoint inhibitors. Therefore, ideal drugs used in combination with immunocheckpoint inhibitors should meet the following conditions: first, they can kill or inactivate tumor cells to release tumor-specific or associated antigens; Second, MDSC and other immunosuppressive cells can be eliminated. Third, the number and function of T cells were not affected. Gemcitabine is a synthetic antimetabolic tumor drug widely used in the treatment of locally advanced or metastatic non-small cell lung cancer. Myelosuppression is the dose - limiting toxicity of gemcitabine, which includes lymphocytopenia. Therefore, if the commonly used clinical dose gemcitabine is used in combination with pd-1 antibody, the effect of pd-1 antibody will be affected due to the reduction of lymphocytes caused by gemcitabine. Therefore, we speculated that the reduced-dose treatment of gemcitabine combined with pd-1 antibody might have synergistic anti-tumor effect on the second-line and above second-line treatment of non-small cell lung cancer with negative driver gene, and the adverse reactions were relatively mild. This study is a phase IV, open, non-randomized, single-arm, single-center study to investigate the safety and efficacy of half-dose gemcitabine combined with pd-1 antibody in second-line and above treatment of non-small cell lung cancer patients with negative driver genes. Fifty subjects will be enrolled in this study. The primary endpoint of the study was ORR, while secondary endpoints included DCR, PFS, and OS.
The purpose of this observation study is to evaluate long term safety and efficacy at 2~3 years after surgery on patients who have completed nasal septal deformity surgery using TnR Nasal Mesh.
Analysis of Gut Microbiota in Patients With Brain Metastasis of Non-small Cell Lung Cancer Treated by Pembrolizumab Combined With Chemotherapy
The investigators aim to characterise Coronavirus Disease 2019 (COVID-19) in every age group. On the one hand, emphasis is put on the initial presentation, clinical course, outcome and the therapy used. On the other hand further investigations regarding viral and bacterial coinfections, and response of the immune system will be conducted. This study should serve to improve the understanding of COVID-19, to identify risk factors for a severe clinical course and to obtain further insights into pathophysiology of this new infectious disease.
The aims of this research are to determine if vertical bitewings will be more effective and more comprehensive for the diagnosis of caries and the level of alveolar bone loss than the horizontal bitewing technique for the patients at King Abdulaziz University over the age of 18. This is a cross sectional study. All the images in this study will be conducted at School of Dentistry, King Abdulaziz University. Each patients will be exposed to 4 horizontal bitewing for posterior teeth ( standard of care ) and 4 vertical bitewing for the same area ( experimental ). The radiographs will be processed digitally. All the x ray will be taken using the standard protection protocol.
The purpose of this study is to evaluate drug-drug interaction by comparing the pharmacokinetics (PK)/pharmacodynamics (PD), safety, and tolerability of single/multiple doses of DWP16001 , DWC202001 and DWC202002 alone or in combination in healthy male adults.
There is significant interest throughout the United States in performing a well-designed study to evaluate whether there is value in using Hydroxychloroquine or Chloroquine as a pre-exposure prophylaxis or post-exposure prophylaxis regimen for COVID-19 patients and at risk personnel. We have designed a prospective double blinded randomized controlled clinical trial to answer just this question. The study will consist of 4 arms: 1. A placebo control arm of 450 patients 2. A low dose prophylaxis arm of 450 patients treated with 200mg Hydroxychloroquine daily 3. A high dose prophylaxis arm of 450 patients treated with 400mg Hydroxychloroquine daily 4. A post-exposure arm of 100 patients treated with 400mg Hydroxychloroquine daily for 7 days.
This study consists in a randomized controlled trial which objective is to assess the accuracy of a dynamic navigation system in dental implant placement in partially edentulous patients compared with the conventional freehand method.
Many critical ethical questions arise in pandemic covid 19planning, preparedness and response. These include: Who will get priority access to medications, vaccines and intensive care unit beds, given the potential shortage of these essential resources? In the face of a pandemic, what obligations do health-care workers have to work not withstanding risks to their own health and the health of their families? How can surveillance, isolation, quarantine and social-distancing measures be undertaken in a way that respects ethical norms? What obligations do countries have to one another with respect to pandemic covid 19 planning and response efforts?
Coronavirus Disease 2019 (COVID-19) is spreading worldwide and has become a public health emergency of major international concern. Currently, no specific drugs or vaccines are available. For severe cases, it was found that aberrant pathogenic T cells and inflammatory monocytes are rapidly activated and then producing a large number of cytokines and inducing an inflammatory storm.Mesenchymal stem cells (MSCs) have been shown to possess a comprehensive powerful immunomodulatory function. This study aims to investigate the safety and efficacy of intravenous infusion of mesenchymal stem cells in severe patients with COVID-19.