View clinical trials related to Immunity.
Filter by:Patients who undergo kidney transplant must take medications to prevent organ rejection. There are standard immunosuppressant medications such as prednisone, tacrolimus (Prograf), mycophenolate mofetil(Cellcept) or sirolimus (Rapamune) that are given to patients to prevent rejection. It is well known that patients on immunosuppressant medications are at increased risk from viral infections, such as influenza. However, it is not well understood how immunosuppressive medications may uniquely affect the immune response to infection. This study will determine whether there are unique differences in the effects on the immune system by these different immunosuppressive medications, particularly differences between tacrolimus and sirolimus.
This study aimed to clarify existence of immunological benefit of laparoscopic colon cancer surgery compared to open colon surgery.
Functional properties of chitooligosaccharides have been studied for antitumor activity, immunostimulating effects, antimicrobial activity, free radical scavening activity, adn angiotensin I converting enzyme inhibitory activity. Recent in vitro, and in vivo toxicity and absorbability studies have demonstrated that chitooligosaccharides have high absorbability and are essentially non-toxic. In the present study, we prepared a chitooligosaccharide with high absorbability and evaluated its effects on activation of immune function and cardiovascular funciton(lipid, atrial stiffness, etc) in healthy adults. This study was a 8-week, randomized, double-blind clinical trial. The 30 volunteers were divided into a control group(n=10), half dose chitooligosaccaride(FACOSTM) intake group(n=10), and full dose FACOS intake group(n=10). Peripheral blood mononuclear cells(PBMCs) were isolated and cultured in 12 well plate for 48 hours. Cytokine production by PBMCs pre- and postintervention were measured simultaneously after stimulation with lipopolysaccaride.
Vitamin A deficiency in children is associated with increased mortality and morbidity due to respiratory tract and diarrhoeal infections. Vitamin A supplementation has been shown in some studies to reduce morbidity due to respiratory diseases. However, other studies to reduce could not document such benefit from vitamin A supplementation. The role of vitamin A on immunity in humans is not yet clear due to inconclusive results. To evaluate immune changes and compare those with of a known immunopotent agent like zinc, a randomised double blind study will be carried out in 1-3 year aged children without acute illness and wt/age between 61% and 70% of NCHS standard. Baseline anthropometry and vitamin A status will be determined using MRDR test and immune status will be estimated. Each group consisting of 50 children will either receive vitamin A 200,000 IU over 7 days or 40 m elemental zinc daily for 7 days or both or placebo. After 8 weeks immunity test will be repeated. Immunity tests will include serum 1gA, 1gM, 1gG an lymphocyte simulation and 8 antigen multiple skin test. Undiminished children will be given measles vaccine and serum titre will be measured before and after supplementation. Vitamin A status will be estimated by MRDR test. Vitamin A2 will be given and 1ml blood sample will be collected after 5 hours to see the ratio of vitamin A1 and A2 (<0.06 as cut off) as the modified relative dose response (MRDR test). Doses of vitamin A or zinc will be repeated at the completion of 2 month. The results will be compared between groups and within groups at baseline and after 6 weeks. The study will generate information which will help to examine the immune response of vitamin A therapy in children as an underlying factor for reduction in mortality or morbidity. The study will be completed within a year.
Tai-Chi-Chuan (TCC), a branch of traditional Chinese martial arts, has been widely practiced since the 17th century. Recent studies have shown that TCC can improve cardiorespiratory function, muscle strength, humoral and cellular immunity, metabolic response and mental control. Cultured monocytes from blood or bone marrow can be triggered to differentiate to myeloid dendritic cells (DC). DCs are specialized leukocytes for presenting antigens to quiescent, naive, and memory T cells, and they play pivotal roles in the induction of cell-mediated as well as humoral immune responses in vivo. Mature DCs have a capacity for initiating immunity or tolerance, which depends on their activation state. In this study we will investigate the effect of TCC on DC differentiation in the peripheral blood obtained from the healthy donors who take part with and without TCC exercise. The distribution of various DC sub-populations (myeloid DC and plasmacytoid cell) will be analyzed by detecting surface marker expression.