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- Creators: Barrett, The Honors College
- Creators: Hackney Price, Jennifer
- Creators: Bains, Supreet
- Creators: Gumel, Abba B
- Status: Published
The ever-increasing importance of cancer and neurodegenerative diseases continues to grow as populations across the world are affected by death and aging. The vitamin A (RXR) and vitamin D (VDR) receptor pathways offer promising potential to aid in treatment of cancer and Alzheimer’s disease. This thesis discusses the potential application of novel analogs of Bexarotene (RXR agonist), MeTC7 (a new potent VDR antagonist), and vitamin D as possible therapeutics for cancer and Alzheimer’s disease.
Ultra-short-pulse (USP) lasers in the visible range have been shown to have widespread sterilizing effects on pathogens, which is believed to be caused by mechanical perturbations induced in the pathogen that disrupt essential processes leading to inactivation. This paper demonstrates a complete inactivation of Zika virus, a single-stranded enveloped RNA virus, using USP-laser technology and adds to the growing body of literature on the effectiveness of USP-laser inactivation. The paper also surveys previous inactivation studies to draw inferences about the nature of the Zika virus inactivation. We suggest that the method of inactivation in Zika virus is the selective amalgamation of viral capsid proteins into a nonfunctional mass of proteins because of the laser-induced vibrations, which mechanically prevents the release of viral RNA. The survey of similar inactivation experiments also supports the notion that the viral antigens might be unaffected by USP-laser inactivation, justifying the exploration of vaccine development using USP-laser inactivated Zika virus.
Motivated by the fact that understanding the dynamics of disease vector is crucial to understanding the transmission and control of the VBDs they cause, a novel weather-driven deterministic model for the population biology of the mosquito is formulated and rigorously analyzed. Numerical simulations, using relevant weather and entomological data for Anopheles mosquito (the vector for malaria), show that maximum mosquito abundance occurs when temperature and rainfall values lie in the range [20-25]C and [105-115] mm, respectively.
The Anopheles mosquito ecology model is extended to incorporate human dynamics. The resulting weather-driven malaria transmission model, which includes many of the key aspects of malaria (such as disease transmission by asymptomatically-infectious humans, and enhanced malaria immunity due to repeated exposure), was rigorously analyzed. The model which also incorporates the effect of diurnal temperature range (DTR) on malaria transmission dynamics shows that increasing DTR shifts the peak temperature value for malaria transmission from 29C (when DTR is 0C) to about 25C (when DTR is 15C).
Finally, the malaria model is adapted and used to study the transmission dynamics of chikungunya, dengue and Zika, three diseases co-circulating in the Americas caused by the same vector (Aedes aegypti). The resulting model, which is fitted using data from Mexico, is used to assess a few hypotheses (such as those associated with the possible impact the newly-released dengue vaccine will have on Zika) and the impact of variability in climate variables on the dynamics of the three diseases. Suitable temperature and rainfall ranges for the maximum transmission intensity of the three diseases are obtained.