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dc.contributor.supervisorSmith, Ian C.P. (Human Anatomy and Cell Sciences)en_US
dc.contributor.authorMohajeri, Sanaz
dc.date.accessioned2014-04-11T17:29:05Z
dc.date.available2014-04-11T17:29:05Z
dc.date.issued2014-04-11
dc.identifier.urihttp://hdl.handle.net/1993/23446
dc.description.abstractBile is a biofluid synthesized by liver and concentrated in the gallbladder. Interference with the bile flow may cause cholestasis. Primary sclerosing cholangitis (PSC) is an inflammatory cholestatic disorder which eventually may result in liver cirrhosis and failure. The management of PSC is controversial. The only effective treatment for end stage disease is orthotopic liver transplantation (OLT). However, cholangiocarcinoma (CC), which is the major complication of this long-lasting disease, is an absolute contraindication for the surgery. Therefore, early diagnosis of the disease can not only improve the outcome of PSC, but also facilitate the allocation of donated livers to those who can benefit from transplantation. Unfortunately, the diagnosis of CC is challenging. Endoscopic retrograde cholangiopancreatography (ERCP), the gold standard technique, is highly invasive. Non-invasive alternatives such as magnetic resonance cholangiopancreatography (MRCP) have lower accuracy. Therefore, it is essential to develop more accurate and less invasive diagnostic techniques. Magnetic resonance spectroscopy (MRS) is an evolving technique with potential to detect disease-related metabolic changes. In vitro studies have proven the capacity of MRS in the early detection of hepatopancreatobiliary (HPB) disorders based on the metabolic analysis of bile obtained invasively. An in vivo alternative has been attempted by others on human bile within the gallbladder. However, due to the poor quality of the acquired spectra, quantification of most major bile metabolites was not possible, except for choline-containing phospholipids (chol-PLs). In the current study, the quality of the in vivo 1D spectra has been greatly improved, and we have obtained the first 2D L-COSY spectra from bile within the gallbladder. Spectral data from healthy controls and PSC patients were compared. Statistically significant differences in the concentrations of chol-PLs, and glycine- and taurine-conjugated bile acids were revealed in the 1D analysis. Our 2D spectra also demonstrated potential for the detection of metabolic differences between the two groups. The success of these studies indicates a strong potential of in vivo bile MRS techniques to characterize and diagnose a wide variety of HPB disorders.en_US
dc.language.isoengen_US
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjecthuman bileen_US
dc.subjectin vivo 1H MRSen_US
dc.subjectglycine-conjugated bile acidsen_US
dc.subjecttaurine-conjugated bile acidsen_US
dc.subjectcholine-containing phospholipidsen_US
dc.subjectPRESSen_US
dc.subjectL-COSYen_US
dc.titleA novel approach for the diagnosis of human hepatopancreatobiliary diseases: in vivo magnetic resonance spectroscopy of bile in one and two dimensionsen_US
dc.typeinfo:eu-repo/semantics/doctoralThesis
dc.typedoctoral thesisen_US
dc.degree.disciplineHuman Anatomy and Cell Scienceen_US
dc.contributor.examiningcommitteeAnderson, Judy (Biological Sciences) Klonisch, Thomas (Human Anatomy and Cell Sciences) Bezabeh, Tedros (Human Nutritional Sciences) MacKay, Alex (University of British Columbia)en_US
dc.degree.levelDoctor of Philosophy (Ph.D.)en_US
dc.description.noteMay 2014en_US


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