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Assay for Glycosaminoglycans by Tandem Mass Spectrometry and its Applications.

Tomatsu S, Shimada T, Mason RW, Kelly J, LaMarr WA, Yasuda E, Shibata Y, Futatsumori H, Montaño AM, Yamaguchi S, Suzuki Y, Orii T - J Anal Bioanal Tech (2014)

Bottom Line: The RF system consists of an integrated solid phase extraction robot that binds and de-salts samples from assay plates and directly injects them into a MS/MS detector, reducing sample processing time to ten seconds.However, the RF system does not have a chromatographic step, and therefore, cannot distinguish GAGs that have identical molecular weights.In this article, we compare the assay methods for GAGs and describe their potential applications.

View Article: PubMed Central - PubMed

Affiliation: Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, USA.

ABSTRACT
Glycosaminoglycans (GAGs) are distributed in the whole body and play a variety of important physiological roles associated with inflammation, growth, coagulation, fibrinolysis, lipolysis, and cell-matrix biology. Accumulation of undegraded GAGs in lysosomes gives rise to a distinct clinical syndrome, mucopolysaccharidoses. Measurement of each specific GAG in a variety of specimens is urgently required to understand GAG interaction with other molecules, physiological status of patients, and prognosis and pathogenesis of the disease. We established a highly sensitive and accurate tandem mass spectrometry (LC-MS/MS) method for measurements of disaccharides derived from four specific GAGs [dermatan sulfate (DS), heparan sulfate (HS), keratan sulfate (KS), and chondroitin sulfate (CS)]. Disaccharides were produced by specific enzyme digestion of each GAG, and quantified by negative ion mode of multiple reaction monitoring. Subclasses of HS and GAGs with identical molecular weights can be separated using a Hypercarbcolumn (2.0 mm×50 mm, 5 μm) with an aectonitrile gradient in ammonium acetate (pH 11.0). We also developed a GAG assay by RapidFire with tandem mass spectrometry (RF-MS/MS). The RF system consists of an integrated solid phase extraction robot that binds and de-salts samples from assay plates and directly injects them into a MS/MS detector, reducing sample processing time to ten seconds. RF-MS/MS consequently yields much faster throughput than conventional LC-MS/MS-based methods. However, the RF system does not have a chromatographic step, and therefore, cannot distinguish GAGs that have identical molecular weights. Both methods can be applied to analysis of dried blood spots, blood, and urine specimens. In this article, we compare the assay methods for GAGs and describe their potential applications.

No MeSH data available.


Related in: MedlinePlus

Chromatograms of urine ΔDiHS-NS and ΔDi-4S from the rat with MPS VI and the age-matched control ratΔDi-4S (DS) in MPS VI rat is markedly elevated, compared with that in age-matched control rat.
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Figure 11: Chromatograms of urine ΔDiHS-NS and ΔDi-4S from the rat with MPS VI and the age-matched control ratΔDi-4S (DS) in MPS VI rat is markedly elevated, compared with that in age-matched control rat.

Mentions: Disaccharide GAGs assayed by LC-MS/MS have been used for diagnosis, screening, prognosis of clinical severity, and assessment of therapeutic efficacy in human patients and animal models with MPS [2,9-12,22,24-27]. In Figure 10, peaks corresponding to expected elution of each disaccharide are marked with arrows. MRM Parameters designed to detect Di-6S and DiHS-6S also detect Di-4S whereas the parameters specifically designed to detect Di-4S do not detect the low levels of Di-6S and DiHS-6S in these samples. A clear difference in Di-4S level between a rat with MPS VI and a control rat was observed (Figure 11).


Assay for Glycosaminoglycans by Tandem Mass Spectrometry and its Applications.

Tomatsu S, Shimada T, Mason RW, Kelly J, LaMarr WA, Yasuda E, Shibata Y, Futatsumori H, Montaño AM, Yamaguchi S, Suzuki Y, Orii T - J Anal Bioanal Tech (2014)

Chromatograms of urine ΔDiHS-NS and ΔDi-4S from the rat with MPS VI and the age-matched control ratΔDi-4S (DS) in MPS VI rat is markedly elevated, compared with that in age-matched control rat.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4109812&req=5

Figure 11: Chromatograms of urine ΔDiHS-NS and ΔDi-4S from the rat with MPS VI and the age-matched control ratΔDi-4S (DS) in MPS VI rat is markedly elevated, compared with that in age-matched control rat.
Mentions: Disaccharide GAGs assayed by LC-MS/MS have been used for diagnosis, screening, prognosis of clinical severity, and assessment of therapeutic efficacy in human patients and animal models with MPS [2,9-12,22,24-27]. In Figure 10, peaks corresponding to expected elution of each disaccharide are marked with arrows. MRM Parameters designed to detect Di-6S and DiHS-6S also detect Di-4S whereas the parameters specifically designed to detect Di-4S do not detect the low levels of Di-6S and DiHS-6S in these samples. A clear difference in Di-4S level between a rat with MPS VI and a control rat was observed (Figure 11).

Bottom Line: The RF system consists of an integrated solid phase extraction robot that binds and de-salts samples from assay plates and directly injects them into a MS/MS detector, reducing sample processing time to ten seconds.However, the RF system does not have a chromatographic step, and therefore, cannot distinguish GAGs that have identical molecular weights.In this article, we compare the assay methods for GAGs and describe their potential applications.

View Article: PubMed Central - PubMed

Affiliation: Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, USA.

ABSTRACT
Glycosaminoglycans (GAGs) are distributed in the whole body and play a variety of important physiological roles associated with inflammation, growth, coagulation, fibrinolysis, lipolysis, and cell-matrix biology. Accumulation of undegraded GAGs in lysosomes gives rise to a distinct clinical syndrome, mucopolysaccharidoses. Measurement of each specific GAG in a variety of specimens is urgently required to understand GAG interaction with other molecules, physiological status of patients, and prognosis and pathogenesis of the disease. We established a highly sensitive and accurate tandem mass spectrometry (LC-MS/MS) method for measurements of disaccharides derived from four specific GAGs [dermatan sulfate (DS), heparan sulfate (HS), keratan sulfate (KS), and chondroitin sulfate (CS)]. Disaccharides were produced by specific enzyme digestion of each GAG, and quantified by negative ion mode of multiple reaction monitoring. Subclasses of HS and GAGs with identical molecular weights can be separated using a Hypercarbcolumn (2.0 mm×50 mm, 5 μm) with an aectonitrile gradient in ammonium acetate (pH 11.0). We also developed a GAG assay by RapidFire with tandem mass spectrometry (RF-MS/MS). The RF system consists of an integrated solid phase extraction robot that binds and de-salts samples from assay plates and directly injects them into a MS/MS detector, reducing sample processing time to ten seconds. RF-MS/MS consequently yields much faster throughput than conventional LC-MS/MS-based methods. However, the RF system does not have a chromatographic step, and therefore, cannot distinguish GAGs that have identical molecular weights. Both methods can be applied to analysis of dried blood spots, blood, and urine specimens. In this article, we compare the assay methods for GAGs and describe their potential applications.

No MeSH data available.


Related in: MedlinePlus