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Comparison Of Antifungal Activity Of Human Salivary Histatin Between Diabetic And Nondiabetic Individuals

By: Farid-Ul-Haq (2013-VA-555) | Prof. Dr. Tahir Yaqub.
Contributor(s): Dr. Ali Raza Awan | Dr. Muhammad Tayyab.
Material type: materialTypeLabelBookPublisher: 2015Description: 44p.Subject(s): Department of Molecular Biology and BiotechnologyDDC classification: 2341-T Dissertation note: Histatins are antimicrobial proteins found in human saliva. These proteins have also been observed to have the ability to aid in wound healing in various organisms. The genes HTN1 and HTN3 have been studied to govern these proteins. Histatin proteins have a vast array of antimicrobial properties. While a fungus, Candida albicans or C. albicans is a part of the human normal gut flora, it is a threat to people who have a compromised immune system. An overgrowth of the fungi belonging to the Candida family leads to candidiasis in humans, and oral candidiasis has been reported to a large extent namely in diabetic patients. The antifungal activity of histatin proteins laid the basis of the current research work. In this study, the antifungal activity of saliva from a total of 64 healthy and diabetic human samples against Candida albicans has been evaluated. The samples of both healthy and diabetic human samples belong from different age ranges: 15-25, 25-35, 35-45 and 45-55 years in order to change in antifungal activity with respect to age of an individual. Antifungal activity was observed through both agar well and agar disk diffusion methods, with agar disk diffusion methods showing positive results. According to the outcomes of this study at least 120μL of healthy saliva sample is required to create a zone of inhibition. Saliva from diabetic individuals showed no antifungal results. This occurrence led to the next part of this study involving amplification of HTN3 gene. The nucleotide sequences of both healthy and diabetic individuals were compared together and showed that the absence of antifungal activity in diabetic individuals might have reasons other than a genetic one, according to this study. The results observed from the present study indicate that healthy human saliva possesses antifungal activity against Candida albicans. In accordance Summary 39 to these results, the naturally occurring antimicrobial activity of histatin proteins present in human saliva can have immense use in the field of medicine.
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Veterinary Science 2341-T (Browse shelf) Available 2341-T
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Histatins are antimicrobial proteins found in human saliva. These proteins have also been
observed to have the ability to aid in wound healing in various organisms. The genes HTN1 and
HTN3 have been studied to govern these proteins. Histatin proteins have a vast array of
antimicrobial properties. While a fungus, Candida albicans or C. albicans is a part of the human
normal gut flora, it is a threat to people who have a compromised immune system. An
overgrowth of the fungi belonging to the Candida family leads to candidiasis in humans, and oral
candidiasis has been reported to a large extent namely in diabetic patients. The antifungal
activity of histatin proteins laid the basis of the current research work.
In this study, the antifungal activity of saliva from a total of 64 healthy and diabetic
human samples against Candida albicans has been evaluated. The samples of both healthy and
diabetic human samples belong from different age ranges: 15-25, 25-35, 35-45 and 45-55 years
in order to change in antifungal activity with respect to age of an individual. Antifungal activity
was observed through both agar well and agar disk diffusion methods, with agar disk diffusion
methods showing positive results. According to the outcomes of this study at least 120μL of
healthy saliva sample is required to create a zone of inhibition. Saliva from diabetic individuals
showed no antifungal results.
This occurrence led to the next part of this study involving amplification of HTN3 gene.
The nucleotide sequences of both healthy and diabetic individuals were compared together and
showed that the absence of antifungal activity in diabetic individuals might have reasons other
than a genetic one, according to this study. The results observed from the present study indicate
that healthy human saliva possesses antifungal activity against Candida albicans. In accordance
Summary
39
to these results, the naturally occurring antimicrobial activity of histatin proteins present in
human saliva can have immense use in the field of medicine.

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