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Full-Text Articles in Life Sciences
Immunosuppressive Effects Of Triclosan, Nonylphenol, And Ddt On Human Natural Killer Cells In Vitro, Felicia Udoji, Tamara Martin, Rachel Etherton, Margaret M. Whalen
Immunosuppressive Effects Of Triclosan, Nonylphenol, And Ddt On Human Natural Killer Cells In Vitro, Felicia Udoji, Tamara Martin, Rachel Etherton, Margaret M. Whalen
Chemistry Faculty Research
Human natural killer (NK) cells are a first-line immune defense against tumor cells and virally-infected cells. If their function is impaired, it leaves an individual more susceptible to cancer development or viral infection. The ability of compounds that contaminate the environment to suppress the function of NK cells could contribute to the increased risk of cancer development. There are a wide spectrum of compounds that significantly contaminate water and food that are consumed by humans, leading to accumulation of some of these compounds in human tissues. In the current study, we examined the ability of three such compounds to diminish …
Tetrabromobisphenol A Has Immunosuppressive Effects On Human Natural Killer Cells, Esther Caroline Kibakaya, Krishna Stephen, Margaret M. Whalen
Tetrabromobisphenol A Has Immunosuppressive Effects On Human Natural Killer Cells, Esther Caroline Kibakaya, Krishna Stephen, Margaret M. Whalen
Chemistry Faculty Research
Human natural killer (NK) cells are lymphocytes that destroy tumor cells, virally-infected cells, and antibody-coated cells. Tetrabromobisphenol A (TBBPA) is used both as a reactive and as an additive flame retardant in a variety of materials and appears to contaminate the environment. TBBPA has been found in human blood samples and if it interferes with NK cell function, this could increase the risk of tumor development and/or viral infection. The present study examines the effects of exposure to various concentrations of TBBPA for 24 hr, 48 hr, and 6 days on the lytic function, tumor-target-binding function, and ATP levels of …
Hexabromocyclododecane Decreases The Lytic Function And Atp Levels Of Human Natural Killer Cells, Natasha C. Hinkson, Margaret M. Whalen
Hexabromocyclododecane Decreases The Lytic Function And Atp Levels Of Human Natural Killer Cells, Natasha C. Hinkson, Margaret M. Whalen
Chemistry Faculty Research
This study investigates the effect of hexabromocyclododecane (HBCD) on the lytic function of human natural killer (NK) cells and on ATP levels in NK cells. NK cells are capable of lysing tumor cells, virally infected cells, and antibody-coated cells. HBCD is a brominated cyclic alkane used primarily as an additive flame retardant. If HBCD interferes with NK cell function, this could increase risk of tumor development and/or viral infection. NK cells were exposed to various concentrations of HBCD for 24 and 48 h and 6 days before determining lytic function and ATP levels. ATP levels and lytic function were also …
Glutathione Diminishes Tributyltin- And Dibutyltin-Induced Loss Of Lytic Function In Human Natural Killer Cells, Jeralyn J. Powell, Mclisa V. Davis, Margaret M. Whalen
Glutathione Diminishes Tributyltin- And Dibutyltin-Induced Loss Of Lytic Function In Human Natural Killer Cells, Jeralyn J. Powell, Mclisa V. Davis, Margaret M. Whalen
Chemistry Faculty Research
This study investigated whether reduced glutathione (GSH) was able to alter the negative effects of tributyltin (TBT) or dibutyltin (DBT) on the lytic function of human natural killer (NK) cells. NK cells are an initial immune defense against the development of tumors or viral infections. TBT and DBT are widespread environmental contaminants, due to their various industrial applications. Both TBT and DBT have been shown to decrease the ability of NK cells to lyse tumor cells (lytic function). The results indicated that the presence of GSH during the exposure of NK cells to TBT or DBT diminished the negative effect …
Pentachlorophenol Decreases Atp Levels In Human Natural Killer Cells, Ugochukwu Nnodu, Margaret M. Whalen
Pentachlorophenol Decreases Atp Levels In Human Natural Killer Cells, Ugochukwu Nnodu, Margaret M. Whalen
Chemistry Faculty Research
Pentachlorophenol (PCP) is used as a wood preservative and is found in human blood and urine. PCP causes significant decreases in the tumor-killing (lytic) function of human natural killer (NK) cells, a critical immune defense. The current study examined the association between decreased lytic function and decreased ATP levels, as well as the ability of antioxidants (vitamin E and reduced glutathione) to prevent PCP-induced decreases in either ATP levels or lytic function. Exposure of NK cells to 10 µm PCP decreased ATP levels by 15% at 24 h, and exposure to 5 µm PCP decreased ATP levels by 32% at …
Effects Of A Series Of Triorganotins On Atp Levels In Human Natural Killer Cells, Laurin N. Holloway, Keith H. Pannell, Margaret M. Whalen
Effects Of A Series Of Triorganotins On Atp Levels In Human Natural Killer Cells, Laurin N. Holloway, Keith H. Pannell, Margaret M. Whalen
Chemistry Faculty Research
Natural killer (NK) cells are our initial immune defense against viral infections and cancer development. Thus, agents that are able to interfere with their function increase the risk of cancer and/or infection. A series of triorganotins (trimethyltin (TMT), dimethylphenyltin (DMPT), methyldiphenyltin (MDPT), and triphenyltin (TPT)) have been shown to decrease the lytic function of human NK cells. TPT and MDPT were much more effective than DMPT or TMT at reducing lytic function. This study investigates the role that decreased ATP levels may play in decreases in the lytic function of NK cells induced by these organotins (OTs). A 24h exposure …