Tricia Ann Missall

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Mechanisms of Resistance to Oxidative and Nitrosative Stress: Implications for Fungal Survival in Mammalian Hosts Tricia A. Missall, Jennifer K. Lodge,* and Joan E. McEwen Edward A. Doisy Department of Biochemistry and Molecular Biology and Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, Saint Louis, Missouri(More)
Cryptococcus neoformans is a fungal pathogen most commonly causing meningitis in immunocompromised patients. Current therapies are inadequate, and novel antifungal targets are needed. We have identified by proteomics two thiol peroxidases that are differentially expressed at 37 degrees C, the temperature of the mammalian host. Consistent with their(More)
The ability of the fungal pathogen Cryptococcus neoformans to evade the mammalian innate immune response and cause disease is partially due to its ability to respond to and survive nitrosative stress. In this study, we use proteomic and genomic approaches to elucidate the response of C. neoformans to nitric oxide stress. This nitrosative stress response(More)
Laccases are thought to be important to the virulence of many fungal pathogens by producing melanin, a presumed oxygen radical scavenger. A laccase in Cryptococcus neoformans has been shown to synthesize melanin and contributes to the virulence and the survival in macrophages of this fungal pathogen. One C. neoformans laccase gene, LAC1, previously called(More)
BACKGROUND The histogenesis and differentiation of eccrine tumors, including cylindroma, poroma, spiradenoma and syringoma, remains controversial. This controversy may be because of sporadic and incomplete studies of these neoplasms. METHODS Ten examples each of normal eccrine structures and of four benign eccrine tumors are analyzed with antibodies to(More)
Glutathione peroxidases catalyse the reduction of peroxides by reduced glutathione. To determine if these enzymes are important for resistance to oxidative stress and evasion of the innate immune system by the fungal pathogen Cryptococcus neoformans, two glutathione peroxidase homologues, which share 38 % identity, were identified and investigated. In this(More)
M elanoma in situ, lentiginous type (LM), is a precursor lesion for invasive malignant melanoma, lentiginous type (LMM). Already the most prevalent subtype of in situ melanoma, LM has been shown to be increasing in incidence. Currently, nonsurgical patients with LM have no treatment alternative but irradiation and so must endure the associated adverse(More)
We report the case of a 2-year-old boy from a family with limited financial resources who presented with cutaneous abnormalities, a history of congenital heart defect, and a presumptive diagnosis of Noonan syndrome. Genetic testing had been deferred because of a lack of funds. Skin findings were characteristic of cardiofaciocutaneous syndrome, including(More)
A 23-year-old Chinese man presented with a 3-year history of a pruritic eruption. On examination, pink urticarial papules associated with hyperpigmented reticulated patches were noted on his neck, back, and upper chest. Histopathology revealed vacuolar interface dermatitis and numerous gram-negative rods within a dilated hair follicle. The organisms were(More)