de Godoy M R C, Knapp B K, Parsons C M, Swanson K S, Fahey George C
Department of Animal Sciences
Department of Animal Sciences.
J Anim Sci. 2014 Jun;92(6):2447-57. doi: 10.2527/jas.2013-6504.
The objective of this research was to measure in vitro hydrolytic digestion, glycemic and insulinemic responses in dogs, and true ME (TMEn) content of select soluble corn fibers (SCF) in roosters. The first generation (G1) SCF included hydrochloric acid-treated corn syrup (G1-CS-HCl), an SCF with an increased total dietary fiber (TDF) content (G1-SCF-HCl), an SCF that was spray-dried (G1-SCF-SD), and a hydrogenated SCF (G1-SCF-hydrog). The second generation (G2) SCF included those prepared using phosphoric acid catalyzation in both a liquid [G2-SCF-phos (Lq)] and powder [G2-SCF-phos (Pw)] form, and SCF that were prepared using hydrochloric acid catalyzation in both a liquid [G2-SCF-HCl (Lq)] and powder [G2-SCF-HCl (Pw)] form. Also, in the G2 set of samples were SCF prepared using the same method, but in 3 separate batches, all of which contained 70% TDF and 15% sugars. Two were in liquid form [G2-SCF-phos+HCl (Lq1)] and [G2-SCF-phos+HCl (Lq2)], and one in powder form ([G2-SCF-phos+HCl (Pw)]. A lower sugar form (80% TDF and 5% sugar) of SCF was also evaluated (G2-SCF-low sugar). Glucose was the major free sugar and bound monosaccharide in all SCF except for G1-SCF-hydrog that had greater concentrations of sorbitol. All SCF had intermediate to low amounts of monosaccharides released as a result of in vitro hydrolytic digestion, with glucose being the primary sugar component released. The G1-SCF were more digestible in vitro (approximately 50%) compared to G2-SCF (approximately 32%). All SCF had attenuated glycemic responses in adult dogs compared to a maltodextrin control (P < 0.05). The G2-SCF, on average, had lower glycemic responses and TMEn values in roosters than G1-SCF. All SCF had low free sugar concentrations with varying degrees of resistance to digestion, reduced caloric content, and attenuated glycemic and insulinemic responses in adult dogs. These ingredients are potential candidates for inclusion in reduced calorie and low glycemic canine diets.
本研究的目的是测定犬类的体外水解消化、血糖和胰岛素反应，以及公鸡中选定的可溶性玉米纤维（SCF）的真代谢能（TMEn）含量。第一代（G1）SCF包括盐酸处理的玉米糖浆（G1-CS-HCl）、膳食纤维（TDF）含量增加的SCF（G1-SCF-HCl）、喷雾干燥的SCF（G1-SCF-SD）和氢化SCF（G1-SCF-hydrog）。第二代（G2）SCF包括以液体[G2-SCF-phos（Lq）]和粉末[G2-SCF-phos（Pw）]形式使用磷酸催化制备的SCF，以及以液体[G2-SCF-HCl（Lq）]和粉末[G2-SCF-HCl（Pw）]形式使用盐酸催化制备的SCF。此外，在G2组样品中，还有使用相同方法制备的SCF，但分3个不同批次，所有批次均含有70%的TDF和15%的糖。其中两个为液体形式[G2-SCF-phos+HCl（Lq1）]和[G2-SCF-phos+HCl（Lq2）]，一个为粉末形式[G2-SCF-phos+HCl（Pw）]。还评估了低糖形式（80%TDF和5%糖）的SCF（G2-SCF-低糖）。除了G1-SCF-hydrog中山梨醇浓度较高外，葡萄糖是所有SCF中的主要游离糖和结合单糖。所有SCF在体外水解消化后释放的单糖量为中等至低水平，葡萄糖是释放的主要糖类成分。与G2-SCF（约32%）相比，G1-SCF在体外更易消化（约50%）。与麦芽糖糊精对照相比，所有SCF在成年犬中均具有减弱的血糖反应（P<0.05）。平均而言，G2-SCF在公鸡中的血糖反应和TMEn值低于G1-SCF。所有SCF的游离糖浓度较低，具有不同程度的抗消化性、较低的热量含量，并且在成年犬中具有减弱的血糖和胰岛素反应。这些成分有可能被纳入低热量和低血糖的犬粮中。
