Patricia Tamez-Guerra

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The systemic immune response of Trichoplusia ni after Bacillus thuringiensis (Bt) exposure was evaluated by comparing the expression of genes encoding antimicrobial peptides (AMPs) in Bt-susceptible and -resistant T. ni strains that were either exposed or not to XenTari (Bt-XT). AMP genes were detected by RT-PCR using primers for attacin, gloverin, lebocin,(More)
Plantago major (PM), also known as plantain, is a weed found in temperate zones worldwide. PM leaves have been associated with various biological properties ranging from antiinflammatory, antimicrobial and antitumour to wound healing. However, its mechanism of action associated with boosting of the immune function remains to be elucidated. We found that(More)
Wild type and corresponding transgenic tomato (Lycopersicon esculentum Miller) and two tobacco (Nicotiana spp.) plants that express high levels of a tobacco anionic peroxidase were used to determine what type of interactions occurred between peroxidase altered plant chemistry and the baculovirus Anagrapha falcifera nucleopolyhedrovirus (AfMNPV) for control(More)
A multiple-embedded nucleopolyhedrovirus isolated from Anagrapha falcifera (Kirby) (AfMNPV) has potential to be developed into a microbial bioinsecticide because the host range includes several economic pests. We tested spray-dried AfMNPV formulations after storage for insecticidal activity based on bioassays with neonate Trichoplusia ni (Hübner). Eight(More)
Orius sauteri (Poppius; Hemiptera: Anthocoridae) is an important predator of western flower thrips, Frankliniella occidentalis (Pergande; Thysanoptera: Thripidae). O. sauteri would be directly exposed to the entomopathogenic fungus Beauveria bassiana (Bals.) Vuillemin in the field should the fungus be used as a biopesticide. If the fungus were to negatively(More)
The present study was undertaken to validate the antitumor potential of Gymnosperma glutinosum from regional people's account, using the in vitro and in vivo L5178Y-R lymphoma murine model. Non-polar G. glutinosum crude extracts were tested on L5178Y-R cells. We found significant (p < 0.05) cytotoxic activity (up to 40%) of the hexane extract, which was(More)
Bacillus thuringiensis Berliner is a highly efficacious bioinsecticide used to control lepidopteran pests in the field. Unfortunately, it has limited residual activity on plants because sunlight inactivates spores and crystals and they can be washed off by rain. To minimize loss of activity, formulations must contain UV protectants, stickers, or both. We(More)
Opioids represent a major source of relief for acute and chronic, moderate to severe nonmalignant pain. However, opioid abuse may cause immunosuppression leading to infections and cancer development. Recently we reported results on novel non-peptidic delta- and mu-selective opioids that induced immunopotentiation in vitro and ex vivo. In the present study,(More)
Dengue is a viral disease transmitted by Aedes mosquitoes. It is a threat for public health worldwide and its primary vector Aedes aegypti is becoming resistant to chemical insecticides. These factors have encouraged studies to evaluate entomopathogenic fungi against the vector. Here we evaluated mortality, infection, insemination and fecundity rates in A.(More)
Nucleopolyhedroviruses originally isolated from Anagrapha falcifera (Kirby) and Autographa californica (Speyer) were formulated with various ingredients using a spray dry method and tested for residual field activity in Illinois and Mississippi. In Mississippi, field tests were conducted on cotton in 1997, whereas in Illinois tests were conducted on cabbage(More)