scholarly journals Guar gum and reduction of post-prandial glycaemia: effect of incorporation into solid food, liquid food, and both

1979 ◽  
Vol 41 (3) ◽  
pp. 505-510 ◽  
Author(s):  
T. M. S. Wolever ◽  
D. J. A. Jenkins ◽  
R. Nineham ◽  
K. G. M. M. Alberti

1. The influence of the dose and the form in which guar gum was given on the degree of ‘flattening’of blood glucose curves was studied in five subjects using meals of bread and soup containing 5 or 10 g guar gum.2. When 5 g guar gum was added to bread the peak increase of blood glucose was reduced by 41% (P < 0.002), with 5 g guar in soup, the reduction was 54% (P < 0.001) while a reduction of 68% (P < 0.001) was seen with 10 g guar gum (5 g in bread and 5 g in soup). The corresponding reduction in insulin peak increases were 37% (P < 0.002), 50% (P < 0.001) and 65% (P < 0.001) respectively.3. The difference between the two 5 g doses was not significant with respect to the reduction of the peak increases in blood glucose and serum insulin; however the difference between the 5 g dose in bread and the increases in blood glucose and serum insulin; however the difference between the 5 g dose in bread and the 10 g dose was significantly different (P < 0.002 for glucose, P < 0.01 for insulin).4. The results indicate that as little as 5 g guar gum may reduce the glycaemia following a 45 g carbohydrate meal, but perhaps due to earlier and more complete mixing, guar gum is most effective when added to the liquid phase of the meal.

2020 ◽  
Vol 8 (1) ◽  
pp. 60
Author(s):  
Ninik Rustanti ◽  
Vifin Zakiahtin Nafsih ◽  
Rosita Nur Avisha ◽  
Dewi Marfu’ah Kurniawati ◽  
Rachma Purwanti ◽  
...  

Background: Pre metabolic syndrome is characterized by two of five risk factors: central obesity, dyslipidemia, hypertension, and increased fasting blood glucose. Cinnamon yogurt and soygurt contain antioxidants and fiber which can improve insulin sensitivity and blood glucose homeostasis and prevent cell damage in pre-metabolic syndrome conditionsObjective: This study aimed to determine the effect of cinnamon yogurt and soygurt on fasting blood glucose (FBG), serum insulin, and malondialdehyde (MDA) levels in pre-metabolic syndrome rats.Method: This study was an experimental study with a pre and post-test control group design. The subjects were 15 male Sprague Dawley rats which were divided into 5 normal control mice (K) and 10 pre metabolic syndrome mice with a diet high in fat and fructose for group P1 (yogurt) and P2 (soygurt) each of 5 mice. The yogurt and soygurt were given as much as 3.4 ml / g BW for 28 days. FBG levels were measured by the GOD-PAP method, while serum insulin and MDA levels were by the ELISA method. Different tests before and after treatment using Paired t-test or Wilcoxon. The difference tests between groups using the One-Way ANOVA test or Kruskal Wallis.Results: There were no differences in FBG and MDA levels between groups after intervention (p> 0.05). The highest percentage reduction in FBG in the P2 (-11.59%), then P1 (-4.06%). The decrease in MDA levels in group P1 = 19.17%, and P2 = 15.44% lower than K = 24.43%. After the intervention, the insulin level in group P2 (0.46 ng / ml) was significantly higher than P1 (0.318 ng/ml), but both were not different from K (0.384 ng / ml).Conclusion: There was no significant effect on the administration of cinnamon yogurt and soygurt to FBG, serum insulin, and MDA levels.


1981 ◽  
Vol 46 (2) ◽  
pp. 267-276 ◽  
Author(s):  
P. R. Ellis ◽  
E. C. Apling ◽  
A. R. Leeds ◽  
N. R. Bolster

1. Bread alone and supplemented with guar gum at three levels (50, 100 and 150 g/kg) was given to eleven non-diabetic subjects, and blood glucose and serum insulin were determined preprandialy, and at 30 min and 60 min after commencement of the meal. The satiating effect, up to 120 min, of the guar bread and its acceptability to the same group of normal volunteers was also studied.2. No significant differences in blood glucose were observed between control and guar breads at 30 min and 60 min, apart from 100 g guar/kg bread at 30 min (P < 0·05). A significant difference in serum insulin was indicated between: control and 50 (P < 0·02) and 150 (P < 0·02) guar/kg breads at 30 min; control and 50 (P < 0·05), 100 (P < 0·001) and 150 (P < 0·05) guar/ke breads at 60 min.3. There were no significant differences in the satiety scores for control and guar breads. Significant increases in satiety attributed to 150 g guar/kg bread were found when compared to: 50 g guar/kg bread immediately after eating (P < 0·05), 100 g guar/kg bread at 60 min (P < 0·02) and 50 and 100 g guar/kg breads at 120min (both P < 0·05).4. There was a positive correlation between hedonic score and relative replacement of guar (r 0·62, P < 0·001, n 44) and from the regression line it was found that 50 and 100 g guar/kg breads produced hedonic scores close to a neutral response of 5, whereas 150 g guar/kg bread at a predictive score of 6·3 appeared to be unacceptable to our subjects.5. Guar bread at the 100 g/kg level (59 g guar/kg bread) reduced the serum insulin by 48% at 60 min and is found to be an acceptable food product at this level of incorporation. However, more information is required to demonstrate the possible satiating potential of guar bread.


1998 ◽  
Vol 79 (06) ◽  
pp. 1184-1190 ◽  
Author(s):  
Yoshiaki Tomiyama ◽  
Shigenori Honda ◽  
Kayoko Senzaki ◽  
Akito Tanaka ◽  
Mitsuru Okubo ◽  
...  

SummaryThis study investigated the difference of [Ca2+]i movement in platelets in response to thrombin and TRAP. The involvement of αIIbβ3 in this signaling was also studied. Stimulation of platelets with thrombin at 0.03 U/ml caused platelet aggregation and a two-peak increase in [Ca2+]i. The second peak of [Ca2+]i, but not the first peak was abolished by the inhibition of platelet aggregation with αIIbβ3 antagonists or by scavenging endogenous ADP with apyrase. A cyclooxygenase inhibitor, aspirin, and a TXA2 receptor antagonist, BM13505, also abolished the second peak of [Ca2+]i but not the first peak, although these regents did not inhibit aggregation. Under the same assay conditions, measurement of TXB2 demonstrated that αIIbβ3 antagonists and aspirin almost completely inhibited the production of TXB2. In contrast to thrombin-stimulation, TRAP caused only a single peak of [Ca2+]i even in the presence of platelet aggregation, and a high level of [Ca2+]i increase was needed for the induction of platelet aggregation. The inhibition of aggregation with αIIbβ3 antagonists had no effect on [Ca2+]i change and TXB2 production induced by TRAP. Inhibition studies using anti-GPIb antibodies suggested that GPIb may be involved in the thrombin response, but not in the TRAP. Our findings suggest that low dose thrombin causes a different [Ca2+]i response and TXA2 producing signal from TRAP. Endogenous ADP release and fibrinogen binding to αIIbβ3 are responsible for the synthesis of TXA2 which results in the induction of the second peak of [Ca2+]i in low thrombin- but not TRAP-stimulated platelets.


2010 ◽  
Vol 5 (2) ◽  
pp. 87
Author(s):  
Rusman Efendi ◽  
Evy Damayanthi ◽  
Lilik Kustiyah ◽  
Nastiti Kusumorini

<p class="MsoNormal" style="margin: 0cm 7.1pt 6pt 14.2pt; text-align: justify; text-indent: 1cm;"><span style="font-size: 10pt;">Diabetes mellitus is degeneratif disease with high prevalence that happens in many countries. Several studies had been done to control diabetes by using green tea, mullberry leaf  tea, and their mixture. The aim of this research was to analyze the influence of the administration green tea, mullbery leaf tea, and their mixtures to blood glucose level of diabetic rats both during 120 minutes after administration. This research had four phases, first to determine the best mullberry leaf tea, second to fourth phases respectively, determine turnover of blood glucose level on normal rats; attempt during 120 minutes on diabetic rats.  The result of research during 120 minutes have showed that blood glucose level on diabetic rats which were administered by green tea, mullberry leaf tea and their mixture is significantly difference with diabetic rats which were administered by water. Blood glucose level at baseline increased at 30<sup>th </sup>minutes and showed the difference significantly and then until 60<sup>th</sup> and 120<sup>th</sup> minutes and relatively stable. During 120 minutes after feed consumption, inhibition of blood glucose level occured increasingly on diabetic rats which were administered by green tea, mullberry leaf tea, and their mixture compared to diabetic rats which were administered by water.</span></p>


2020 ◽  
Vol 20 (3) ◽  
pp. 446-452
Author(s):  
Seyed S. Mortazavi-Jahromi ◽  
Shahab Alizadeh ◽  
Mohammad H. Javanbakht ◽  
Abbas Mirshafiey

Background: This study aimed to investigate the effects of guluronic acid (G2013) on blood sugar, insulin, and gene expression profile of oxLDL receptors (SR-A, CD36, LOX-1, and CD68) in the experimental model of diabetes. Methods: 18 Sprague Dawley rats were randomly assigned to three groups of healthy control, diabetic control, and G2013 group. Diabetes was induced through intraperitoneal (IP) injection of 60 mg/kg streptozotocin. The subjects were IP treated with 25 mg/kg of G2013 per day for 28 days. The body weight, food intake, fasting blood glucose and insulin were measured. In addition, the expression of mentioned genes was investigated through quantitative real-time PCR. Results: The data showed that the final weight increased significantly in the G2013-treated subjects compared to the diabetic control (p < 0.05). The results indicated that final food intake significantly reduced in the G2013-treated subjects compared to the diabetic control (p < 0.05). The study findings also suggested that the final fasting blood glucose significantly reduced in the G2013-treated group, whereas the final fasting serum insulin level significantly increased in this group compared to the diabetic control (p < 0.05). Moreover, the gene expression levels of SR-A, CD36, LOX-1, and CD68 in the G2013 group significantly reduced compared to the diabetic control (p < 0.05). Conclusion: This study showed that G2013, could reduce blood glucose and increase insulin levels and reduce the gene expression level of oxLDL receptors. In addition, it may probably play an important role in reducing the severity of diabetes-induced inflammatory symptoms.


Author(s):  
Yangfan Gao ◽  
Kostas Tsintzas ◽  
Ian A. Macdonald ◽  
Sally M. Cordon ◽  
Moira A. Taylor

Abstract Background/objectives Intermittent energy restriction (IER) may overcome poor long-term adherence with continuous energy restriction (CER), for weight reduction. We compared the effects of IER with CER for fasting and postprandial metabolism and appetite in metabolically healthy participants, in whom excess weight would not confound intrinsic metabolic differences. Subjects/methods In a 2-week randomised, parallel trial, 16 young, healthy-weight participants were assigned to either CER (20% below estimated energy requirements (EER)) or 5:2 IER (70% below EER on 2 non-consecutive days; 5 days at EER, per week). Metabolic and appetite regulation markers were assessed before and for 3 h after a liquid breakfast; followed by an ad libitum lunch; pre- and post-intervention. Results Weight loss was similar in both groups: −2.5 (95% CI, −3.4, −1.6) kg for 5:2 IER vs. −2.3 (−2.9, −1.7) kg for CER. There were no differences between groups for postprandial incremental area under the curve for serum insulin, blood glucose or subjective appetite ratings. Compared with CER, 5:2 IER led to a reduction in fasting blood glucose concentrations (treatment-by-time interaction, P = 0.018, η2p = 0.14). Similarly, compared with CER, there were beneficial changes in fasting composite appetite scores after 5:2 IER (treatment-by-time interaction, P = 0.0003, η2p = 0.35). Conclusions There were no significant differences in postprandial insulinaemic, glycaemic or appetite responses between treatments. However, 5:2 IER resulted in greater improvements in fasting blood glucose, and beneficial changes in fasting subjective appetite ratings.


Crystals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 189 ◽  
Author(s):  
Sandra Witkiewicz-Lukaszek ◽  
Anna Mrozik ◽  
Vitalii Gorbenko ◽  
Tetiana Zorenko ◽  
Pawel Bilski ◽  
...  

This work is dedicated to the development of new types of composite thermoluminescent (TL) detectors for simultaneous registration of the different components of ionization radiation based on the single crystalline films (SCFs) of Ce3+-doped Lu3−xGdxAl5O12:Ce (x = 0–1.5) garnet and Y3Al5O12:Ce (YAG:Ce) substrates using the liquid phase epitaxy (LPE) growth method. For this purpose, the TL properties of the mentioned epitaxial structures were examined in Risø TL/OSL-DA-20 reader under excitation by α- and β-particles from 242Am and 90Sr-90Y sources. We have shown that the cation engineering of SCF content can result in more significant separation of the TL glow curves of SCFs and substrates under α- and β-particle excitations in comparison with the prototype of such composite detectors based on the Lu3Al5O12:Ce (LuAG:Ce)/YAG:Ce epitaxial structure. Specifically, the difference between the TL glow curves of Lu1.5Gd1.5Al5O12:Ce SCFs and YAG:Ce substrates increases up to 120 K in comparison with a respective value of 80 degrees in the prototype based on the LuAG:Ce/YAG:Ce epitaxial structure. Therefore, the LPE-grown epitaxial structures containing Lu1.5Gd1.5Al5O12:Ce SCFs and Ce3+-doped YAG:Ce substrate can be successfully applied for simultaneous registration of α- and β-particles in mixed fluxes of ionization radiation.


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