(a.) Of or pertaining to rachitis; affected by rachitis; rickety.
Example Sentences:
(1) Rachitic bone lesions were only partially corrected by the high-Ca diet.
(2) Demineralized rachitic bone (RB) implanted into normal host rats resulted in cartilage and bone induction similar to that seen for normal bone (NB) implants.
(3) In vitro binding of 25-hydroxycholecalciferol (25-(OH)D3) and 1alpha,25-dihydroxycholecalciferol (1,25-(OH)2D3) was studied in the duodenal mucosa cytosol of rachitic rats: both 25-(OH)D3 and 1,25-(OH)2D3 bind to a macromolecule (sedimentation coefficient 5.5 to 6 S in low or high ionic strength) with a high affinity (KD at 4 degrees C = 1.2 X 10-9M and 2 x 10-9M, respectively).
(4) Measurements of 45Ca uptake by rachitic cartilage slices from metastable calcium phosphates solution also indicated inhibition of calcification by heat.
(5) Some of the factors predisposing to rickets were assessed in the rachitic children and in age-matched controls.
(6) The biological activity of 11 alpha-methyl-1 alpha,25-(OH)2D3 closely resembled that of the natural hormone on normal and leukemic cell proliferation and bone resorption, whereas its in vivo effect on calcium metabolism of the rachitic chick was about 50% of that of 1 alpha,25-(OH)2D3.
(7) In the rachitic animal, arterioles, venules, and capillaries were found adjacent to the growth plate, either directly apposed to the hypertrophic chondrocytes or separated from them by bone-forming cells.
(8) The coefficient of correlation between adult height (expressed as standard deviation score) and the average rachitic activity or score was -0.796 (p less than 0.01), indicating that adult height varied inversely with the severity of the disease.
(9) Severe demineralization (greater than -3 SD) was found in four rachitic patients with tubulointerstitial disease.
(10) Rachitic changes were detectable by light microscopy and microradiography in chicks whose skeletons appeared normal roentgenographically.
(11) Parvalbumin was found to be independent of the vitamin D status of the animal since its concentration remained unchanged in kidney extracts of normal, rachitic and vitamin D-replete rats.
(12) In the present studies, we tested the ability of rachitic versus normal rat growth plate chondrocytes in micromass or monolayer primary cultures to produce MVs.
(13) These intestinal complexes were less well developed, decreased in number, and quite often absent, in the apical cytoplasm of absorptive cells from rachitic chicks.
(14) The addition of calcium-binding protein to rachitic mucosa prior to homogenization does not yield a Triton X-100 solubilizable form, indicating that bound calcium-binding protein in vitamin D-replete intestine is not due to adsorption or vesicular entrapment of soluble calcium-binding protein.
(15) Although the rachitic cartilage does mineralize, discontinuities in the mineral distribution are much more severe, with the general failure of fusion of adjacent mineral clusters.
(16) Rachitic changes were induced in young rats by giving dietary Mn (2%) or by phosphate depletion (0.02% P) for 25 days.
(17) Radioisotope studies have shown that collagen synthesized in the shafts of bones from rachitic rats and chicks is similar in chain composition to that normally synthesized.
(18) Indeed these vascular channels appeared to be a basic architectural feature of normal cartilage, although disorganized in the rachitic state.
(19) This hereditary syndrome of renal hypophosphataemia differs from the common familial X-linked hypophosphataemia and the recently described autosomal recessive hypophosphataemic rickets with hypercalciuria by its dominant mode of inheritance; it differs from hypophosphataemic non-rachitic bone disease by the elevated serum 1,25 dihydroxyvitamin D levels and hypercalciuria.
(20) After ultracentrifugation of C(f1) of normal, rachitic, and healing rachitic animals, nonprotein-bound calcium (Ca(f)) and phosphate (P(if)) were determined on supernatant fluids.
Rickets
Definition:
(n. pl.) A disease which affects children, and which is characterized by a bulky head, crooked spine and limbs, depressed ribs, enlarged and spongy articular epiphyses, tumid abdomen, and short stature, together with clear and often premature mental faculties. The essential cause of the disease appears to be the nondeposition of earthy salts in the osteoid tissues. Children afflicted with this malady stand and walk unsteadily. Called also rachitis.
Example Sentences:
(1) A survey carried out two and three years after the launch of the official campaign also showed a reduction in the prevalence of rickets in children taking low dose supplements equivalent to about 2.5 micrograms (100 IU) vitamin D daily.
(2) Phenobarbital did not retard growth nor impede the response to vitamin D therapy of concomitant rickets.
(3) Where UV radiation is restricted, individual propensity to rickets within a given Asian community is mainly determined by dietary factors.
(4) In a large commercial goat farm rickets-like symptoms were diagnosed in goat kids.
(5) One of the metabolites proved to be as active as the parent vitamin in curing rickets and was found in large amounts in liver, blood, and bone.
(6) The influence of extra phosphorus (P) and calcium (Ca) on the incidence of rickets was studied in 40 infants with a birthweight below 1.5 kg.
(7) The healing of rickets, the stimulation of intestinal Ca and P transport, the effect on bone mineral, and the induction of renal calcifications have been examined.
(8) It has been confirmed that the foetal parathyroid glands are important in development and that thyroparathyroidectomy (TXPTX) of the ovine foetus with thyroxine (T4) replacement leads to hypocalcaemia, retarded skeletal development, depressed calcification and rickets, relative to thyroidectomy plus T4 replacement.
(9) A boy with Lowe syndrome who manifested renal Fanconi syndrome by severe hypophosphatemic rickets, failure to thrive, and metabolic acidosis failed to improve with conventional bolus therapy of phosphate and bicarbonate.
(10) Some of the factors predisposing to rickets were assessed in the rachitic children and in age-matched controls.
(11) Vitamin D deficiency contributes to bone demineralization and rickets.
(12) Lymphocyte cell lines were established from five patients with vitamin D-dependent rickets, type II (VDDR-II).
(13) Clinical signs of rickets are still absent at this time, while an increased activity of the serum alkaline phosphatase signals the beginning of the illness.
(14) The majority of this thickening was due to an increase in the zone of proliferation, identical to that which occurs in calcium-deficiency rickets.
(15) A 22-month-old girl with cystinotic rickets was given 1 microgram 1,25-dihydroxycholecalciferol (1,25-DHCC) daily in addition to standard treatment.
(16) The patients were divided into 5 groups, 1) Osteomalacia and rickets 42 cases, showing typical changes of bone in X-ray films.
(17) In addition, the improved growth and healing of rickets further attest to the efficacy of the new treatment.
(18) In contrast, it appears that doses of either drug that are curative in D deficiency rickets are only partly active in PDR.
(19) During the latter half of an infant's first year, adequate mineral and vitamin D intakes may be important not only for the prevention of rickets but also for the attainment of optimal adult peak bone mass.
(20) Renal tubular dysfunctions with secondary rickets may be lacking altogether, even in chronic patients.