Lexaria Achieves Significant Breakthrough in Alternative Nicotine Delivery Technology
ACCESSWIREApril 17, 2018
KELOWNA, BC / ACCESSWIRE / April 17, 2018 / Lexaria Bioscience Corp. (LXRP) (LXX.CN) (the "Company" or "Lexaria"), a drug delivery platform innovator, is pleased to announce positive topline results upon completion of its first ingestible nicotine in vivo (animal) absorption study. Lexaria is pursuing the use of its patented DehydraTECHTM technology as a possible new nicotine delivery method, an edible dose absorbed through the gastrointestinal tract, with potential both as a nicotine replacement therapy as well as an alternative product format for regular tobacco users.
DehydraTECHTM delivered the following major nicotine absorption performance improvements:
1,160% faster delivery of equivalent peak quantities of nicotine to the bloodstream than achieved with controls (within 15 min vs. 2.9 hours);
148% gain in the quantity of peak nicotine delivery to the bloodstream relative to controls;
560% higher brain levels of nicotine where nicotine effects are focused, compared to controls;
Lower urine levels of nicotine excreted than controls, for enhanced nicotine activity and bioavailability over the course of the study;
Lower quantities of key liver metabolites in the bloodstream than controls as hypothesized, suggesting bypass of first pass liver metabolism.
Study Design Parameters:
The study was designed to principally assess the relative ingestible nicotine absorption performance of DehydraTECHTM-powered formulations compared to concentration-matched control formulations that lacked any form of delivery enabling technology in rats. Nicotine was administered in a nicotine polacrilex derivative format as is widely commercialized today in nicotine replacement therapy products such as chewing gums. Twelve male rats were divided into four groups of three, such that DehydraTECHTM and control formulations were each tested at a 1 mg/Kg and 10 mg/Kg dosage level. Formulations were administered orally and all rats were cannulated for blood collection at multiple intervals over an 8-hour duration post-dosing with the first data collection at the 15-minute mark. Urine and feces were also collected for up to a 24-hour duration post-dosing, and essential organ tissue samples were also collected for examination after the study. All samples were subjected to analytical testing in order to quantify the levels of nicotine therein, as well as the levels of three major liver metabolites thereof, hydroxycotinine, nicotine N'-oxide, and cotinine, in order to assess the relative metabolite levels absorbed by the different formulations. Lexaria's hypothesis was tested to prove that its DehydraTECHTM technology would influence more rapid and complete intestinal bioabsorption of nicotine lymphatically with less metabolic degradation by the liver. All animals were also assessed for general tolerability of the administered formulations. The study was conducted at the same independent laboratory in Philadelphia where the Company completed its initial cannabidiol absorption study in 2015.
Results & Observations:
The Lexaria formulations generally achieved faster absorption, higher peak absorption and higher overall quantities of nicotine, on average, in the blood than the concentration-matched control formulations at both the 1mg and 10 mg/Kg doses tested. Furthermore, as previously reported, there were no obvious signs of gastrointestinal distress such as vomiting or diarrhea indicating that the animals appeared to tolerate the treatment well.
Nicotine blood levels were evaluated multiple times over a period of 8 hours after dosing. In the 10mg/Kg dosing arm, the control formulation required nearly 3 hours to reach similar levels of blood absorption that the Lexaria formulation reached in only 15 minutes. Furthermore, the Lexaria formulation went on thereafter to demonstrate peak plasma levels that were 148% of those achieved by the control formulation. If replicated in human studies, these findings are suggestive that Lexaria's technology could prove more effective in elevating blood nicotine levels through edible formats much more quickly and substantially than previously theorized, potentially making ingestible nicotine preparations a viable alternative to today's available product formats while also leading to a more rapid nicotine craving satiation.
Analysis of the liver metabolites revealed, as expected, that overall levels in the blood of two of the three metabolites studied were higher in the control group than in the Lexaria formulation group at the 10 mg/Kg dose. This result was especially pronounced in the 45-minute to 2-hour time interval post-dosing which is consistent with the expected timing of the release of metabolites in higher quantity into the bloodstream by the liver following normal physiological processing of ingested nicotine with the control preparation, compared to the DehydraTECHTM technology that is believed to elude first pass liver metabolism. The Lexaria formulation also demonstrated lower quantities of nicotine in the rat urine at both doses, which is consistent with the fact that the levels of nicotine in the rat blood remained higher over the duration of the study with the Lexaria formulation than with the control. The study also revealed that the Lexaria formulation at the 10 mg/Kg level achieved up to 5.6-times as much nicotine upon analysis of the rat brain tissue that was recovered with the matching control formulation. These findings together perhaps suggest prolongation of nicotine effectiveness with the Lexaria formulation which may also be beneficial in humans to control cravings over an extended time-period from a single edible nicotine dose.
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