A J Hamstra
Overview
Explore the profile of A J Hamstra including associated specialties, affiliations and a list of published articles.
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19
Citations
393
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Recent Articles
11.
Napoli J, Fivizzani M, Hamstra A, Schnoes H, DeLuca H
Anal Biochem
. 1979 Jul;
96(2):481-8.
PMID: 474973
No abstract available.
12.
SHEPARD R, Horst R, Hamstra A, DeLuca H
Biochem J
. 1979 Jul;
182(1):55-69.
PMID: 227368
A multiple assay capable of reliably determining vitamins D(2) and D(3) (ergocalciferol and cholecalciferol), 25(OH)D(2) (25-hydroxyvitamin D(2)) and 25(OH)D(3) (25-hydroxyvitamin D(3)), 24,25(OH)(2)D (24,25-dihydroxyvitamin D), 25,26(OH)(2)D (25,26-dihydroxyvitamin D) and 1,25(OH)(2)D (1,25-dihydroxyvitamin...
13.
Marx S, Spiegel A, Brown E, Gardner D, Downs Jr R, Attie M, et al.
J Clin Endocrinol Metab
. 1978 Dec;
47(6):1303-10.
PMID: 233695
Typical features of hereditary vitamin D-dependent (pseudovitamin D-deficient) rickets were observed beginning at ages 20 and 5 months in a brother and sister. Both had calcium malabsorption correctable with high...
14.
Chesney R, Mazess R, Hamstra A, DeLuca H, OReagan S
Lancet
. 1978 Nov;
2(8100):1123-5.
PMID: 82684
Serum-1,25-dihydroxyvitamin-D3 (1,25-[OH]2D3) was subnormal in children receiving long-term glucocorticoid treatment for various glomerular diseases, including nephrotic syndrome. In children with chronic glomerulonephritis not treated with glucocorticoids who had similar serum-creatinine...
15.
Scriver C, Reade T, DeLuca H, Hamstra A
N Engl J Med
. 1978 Nov;
299(18):976-9.
PMID: 308618
The serum concentration of 1,25-dihydroxylvitamin D (1,25-[OH]2D) in normal children and in children with inherited diseases of bone was compared by use of a competitive binding assay. Observed values were:...
16.
Stern P, Hamstra A, DeLuca H, Bell N
J Clin Endocrinol Metab
. 1978 Jun;
46(6):891-6.
PMID: 263737
Fetal rat bones in organ culture constitute a sensitive system for assay of the vitamin D metabolite, 1 alpha,25-dihydroxyvitamin D3. Significant bone resorption is obtained with as little as 2...
17.
Brooks M, Bell N, Love L, Stern P, Orfei E, Queener S, et al.
N Engl J Med
. 1978 May;
298(18):996-9.
PMID: 205789
Studies were done to determine the cause for hypocalcemia, secondary hyperparathyroidism, osteomalacia and osteitis fibrosa cystica in a 22-year-old black woman. The patient had normal serum 25-hydroxyvitamin D (14 ng...
18.
Eisman J, Hamstra A, Kream B, DeLuca H
Science
. 1976 Sep;
193(4257):1021-3.
PMID: 1085035
A competitive binding assay for 1,25-dihydroxyvitamin D [1,25-(OH2D] in plasma has been developed in which intestinal cytosol preparations from rachitic chicks are used as the binding protein. A new method...
19.
Eisman J, Hamstra A, Kream B, DeLuca H
Arch Biochem Biophys
. 1976 Sep;
176(1):235-43.
PMID: 9906
No abstract available.