Biomaterial Database

In vivo intestinal calcium transport in infant rats: normal and growth retarded. 1979

M K Younoszai, and F K Ghishan

We compared the in vivo transport of calcium (Ca) in the jejunum + ileum of 1-, 2-, 3-, 4-, and 6-week old rats. In normal rats, net absorption and the estimated bidirectional fluxes of Ca (lumen-to mucosa and mucosa-to-lumen) normalized for differences in size of the intestine (mumoles/hour per g weight) were similar in the 1-, 2-, and 3-week old rats and significantly lower in the 6-week old than in the younger rats. Growth retardation (pups raised with mothers fed a diet deficient in protein) appeared to have suppressed net absorption and the bidirectional fluxes of calcium in the 4- and 6-week old rats, but to have slightly enhanced net absorption and the bidirectional fluxes in the 1-, 2-, and 3-week old rats. These findings suggested a change in the mechanism(s) for intestinal transport of Ca during maturation. Rate of gain in body weight expressed as g/day increased with age from 1.4 g/day between 1 and 2 weeks, to 6.1 g/day between 4 and 6 weeks of age. There was no correlation between rate of net Ca absorption from the jejunum + ileum and gain in body weight expressed as g/day or as percent per day.

UI	MeSH Term	Description	Entries
D007408	Intestinal Absorption	Uptake of substances through the lining of the INTESTINES.	Absorption, Intestinal
D007413	Intestinal Mucosa	Lining of the INTESTINES, consisting of an inner EPITHELIUM, a middle LAMINA PROPRIA, and an outer MUSCULARIS MUCOSAE. In the SMALL INTESTINE, the mucosa is characterized by a series of folds and abundance of absorptive cells (ENTEROCYTES) with MICROVILLI.	Intestinal Epithelium,Intestinal Glands,Epithelium, Intestinal,Gland, Intestinal,Glands, Intestinal,Intestinal Gland,Mucosa, Intestinal
D007421	Intestine, Small	The portion of the GASTROINTESTINAL TRACT between the PYLORUS of the STOMACH and the ILEOCECAL VALVE of the LARGE INTESTINE. It is divisible into three portions: the DUODENUM, the JEJUNUM, and the ILEUM.	Small Intestine,Intestines, Small,Small Intestines
D011247	Pregnancy	The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.	Gestation,Pregnancies
D011248	Pregnancy Complications	Conditions or pathological processes associated with pregnancy. They can occur during or after pregnancy, and range from minor discomforts to serious diseases that require medical interventions. They include diseases in pregnant females, and pregnancies in females with diseases.	Adverse Birth Outcomes,Complications, Pregnancy,Adverse Birth Outcome,Birth Outcome, Adverse,Complication, Pregnancy,Outcome, Adverse Birth,Pregnancy Complication
D011488	Protein Deficiency	A nutritional condition produced by a deficiency of proteins in the diet, characterized by adaptive enzyme changes in the liver, increase in amino acid synthetases, and diminution of urea formation, thus conserving nitrogen and reducing its loss in the urine. Growth, immune response, repair, and production of enzymes and hormones are all impaired in severe protein deficiency. Protein deficiency may also arise in the face of adequate protein intake if the protein is of poor quality (i.e., the content of one or more amino acids is inadequate and thus becomes the limiting factor in protein utilization). (From Merck Manual, 16th ed; Harrison's Principles of Internal Medicine, 12th ed, p406)	Deficiency, Protein,Deficiencies, Protein,Protein Deficiencies
D002118	Calcium	A basic element found in nearly all tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes.	Coagulation Factor IV,Factor IV,Blood Coagulation Factor IV,Calcium-40,Calcium 40,Factor IV, Coagulation
D005260	Female		Females
D006128	Growth	Gradual increase in the number, the size, and the complexity of cells of an individual. Growth generally results in increase in ORGAN WEIGHT; BODY WEIGHT; and BODY HEIGHT.
D006130	Growth Disorders	Deviations from the average values for a specific age and sex in any or all of the following: height, weight, skeletal proportions, osseous development, or maturation of features. Included here are both acceleration and retardation of growth.	Stunted Growth,Stunting,Disorder, Growth,Growth Disorder,Growth, Stunted,Stuntings