Developmental and hormone-induced changes in chicken intestinal disaccharidases

Dautlick, Joseph; Strittmatter, Cornelius F.

doi:10.1016/0304-4165(70)90135-2

Cited by 18 publications

(16 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Figure 1A summa rizes the normal patterns of change in maltase, sucrase and lactase activity levels in the jejunum during development of the chick embryo and chick. Data are shown for the jejunum because this portion of the chick intestine contained substantially higher levels of all three disaccharidases than either the duodenum or ileum (8), and the middle third of the jejunum was used for most reproduc ible results. Specific activities are expressed as units per mg tissue protein to show whether an enzyme activity increase is greater than the increase of protein per g wet weight of jejunum which occurs in normal development between the 19-day embryo and 3-day chick stages (fig.…”

Section: Methodsmentioning

confidence: 99%

“…Often a marked change was seen in an enzyme activity about the time of birth (7,18,31) or hatching (4,8,16), or in response to a specific dietary carbohydrate (2,9,30). Hormones can also influence the levels of disaccharidase activity (8,9,19). However, the primary mechanisms have not been elucidated for either dietary or hormonal influences.…”

mentioning

confidence: 99%

“…In the course of this study it was found that several tissues, including intestine, liver and metanephros, contain soluble, Zn2 +-stimulated phosphatase activities at acid or neutral pH with p-nitrophenyl phosphate as substrate (38). We also studied developmental patterns of several disaccharidase activities in chick intestine, and the effects of substrate and hydrocortisone administration on these developmental patterns (8). This paper is concerned primarily with these studies and their interpretation.…”

mentioning

confidence: 99%

“…Such developmental studies have been made on disaccharidases (glycoside hydrolases) of the intestinal mu cosa in man and other mammals (2,7,9,18,19,30,31), and also in avian systems (4,8,16,33). Often a marked change was seen in an enzyme activity about the time of birth (7,18,31) or hatching (4,8,16), or in response to a specific dietary carbohydrate (2,9,30).…”

mentioning

confidence: 99%

See 3 more Smart Citations

Development of Disaccharidase and Phosphatase Activities in the Intestine and Liver

Cf¹

1973

Enzyme Protein

View full text Add to dashboard Cite

Changes in specific activity levels of disaccharidases in the intestine and of phosphatases in liver and intestine were studied during development of the chick embryo and chick. A diversity of developmental patterns were observed among the various enzymes. However, many of the intestinal enzyme activities showed marked increases about the time of hatching, and some declined rapidly from transient peaks shortly after hatching. Most of the hepatic enzyme activities were present at relatively high levels in the embryo and showed modest changes from these levels about the time of hatching. Hydrocortisone administration to embryos evoked premature increases of a number of intestinal enzymes, but resulted in substantial reduction of several hepatic enzyme activities. The different patterns of enzymic differentiation in the two tissues are discussed.

show abstract

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Development of Disaccharidase and Phosphatase Activities in the Intestine and Liver

Cf¹

1973

Enzyme Protein

View full text Add to dashboard Cite

show abstract

“…Many of the endocrine hormones have been found to influence the mucosal levels of hydrolytic enzyme activities. Adrenal hormones, especially glucocorticoids, enhance alkaline phosphatase activity (29) and disaccharidases (7). Sex hormones activate many folate-metabolizing and glycolytic enzymes of the intestine (38)(39)(40)(41)(42)(43)(44).…”

mentioning

confidence: 99%

Sex Variation in the Activities of Mucosal Hydrolytic Enzymes in the Small Intestine of the Rat

Hietanen¹

1975

Digestion

View full text Add to dashboard Cite

Mucosal response of alkaline phosphatase, ATPase and disaccharidase (lactase, maltase and trehalase) activities to sex hormones were studied by comparing male and female rats and castrated males and by injecting testosterone into castrated males. Alkaline phosphatase showed a very steep gradient in the small intestine from the oral to the aboral end, whereas ATPase activity in the ileum was still about 50 % of that in the duodenum. Both enzymes showed only minor sex variations and weak response to castration. Lactase and maltase had peak activities in the jejunum, but trehalase activity was nearly equally high in the duodenal mucosa as in the jejunum. Jejunal lactase activity was about 50 % lower in female than in male rats and castration decreased activity in males to the same low level as found in females. The administration of testosterone to castrated male rats did not enhance activity. Maltase activity showed similar sex variation, although castration was not able to decrease activity during the test period. Trehalase activity was lower in female than in male rats. The administration of testosterone enhance activity in castrated males.

show abstract

Developmental changes in acid proteases of the avian proventriculus

Yasugi

Mizuno

1981

J. Exp. Zool.

View full text Add to dashboard Cite

Developmental changes in acid proteases in the chicken and quail proventriculus were studied. During embryonic stages, the specific acid protease activity of both species showed a peak a few days before hatching and decreased towards the end of the incubation period. The electrophoretic patterns of acid proteases changed considerably at these stages. Within 24 hr after hatching, the activity increased about 30 times that of embryonic stages. Concomitant with this rapid increase, was a shift of electrophoretic patterns to the adult type. This shift occurred even in nonfed, hatched fowls. Electrophoretic patterns and immunochemical studies with the purified chicken and quail pepsinogens revealed that the embryonic and adult proventriculi of both species have stage-specific and species-specific pepsinogens.

show abstract

Developmental and hormone-induced changes in chicken intestinal disaccharidases

Cited by 18 publications

References 17 publications

Development of Disaccharidase and Phosphatase Activities in the Intestine and Liver

Development of Disaccharidase and Phosphatase Activities in the Intestine and Liver

Sex Variation in the Activities of Mucosal Hydrolytic Enzymes in the Small Intestine of the Rat

Developmental changes in acid proteases of the avian proventriculus

Contact Info

Product

Resources

About