14351
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Philipp E, Overbeck L. [The ultrastructure of the cervix epithelium]. Z Geburtshilfe Gynakol 1969; 171:159-71. [PMID: 5355555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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14352
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14353
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14354
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Howell SL, Kostianovsky M, Lacy PE. Beta granule formation in isolated islets of langerhans: a study by electron microscopic radioautography. J Cell Biol 1969; 42:695-705. [PMID: 4895597 PMCID: PMC2107718 DOI: 10.1083/jcb.42.3.695] [Citation(s) in RCA: 79] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
The distribution of radioautographic grains over organelles within the beta cells of rat islets of Langerhans was investigated at various times after pulse labeling of the isolated islets with tritium-labeled amino acids. Ten minutes after the start of labeling most of the grains were situated over the endoplasmic reticulum and cytoplasm; by contrast, 60 min from the start of labeling the majority of the grains were associated with the beta granules. At 20, 30, and 45 minutes after pulse labeling the proportion of grains associated with the Golgi complex was increased two- to three-fold over the 10- or 60-minute values. The distribution of radioautographic grains over granules in the intact cells did not suggest that the electron-lucent type of secretory granules were precursors of the electron-opaque granules. Furthermore, studies of the pattern of grains over granules isolated by centrifugation 60 min after pulse labeling showed no preferential labeling of the electron-lucent type of granule. It is concluded that labeled amino acids are incorporated initially in the endoplasmic reticulum, and that the label subsequently appears in the beta granules. The Golgi complex participates either in the formation of the beta granule or in the translocation of the granule through the cytoplasm of the cell.
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14355
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Frieden E. Ceruloplasmin, a link between copper and iron metabolism. Ortop Travmatol Protez 1969; 30:87-91. [PMID: 4910296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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14356
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Yago N. [Biosynthesis of steroid hormones, with special reference to morphological structure and its function]. Tanpakushitsu Kakusan Koso 1969; 14:886-93. [PMID: 4391024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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14357
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14358
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Panchenko LF, Archakov AI, Aleksandrova TA. [Study of peroxidation of unsaturated fatty acids of lipids in rat liver microsomes]. Vopr Med Khim 1969; 15:494-500. [PMID: 4391654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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14359
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14360
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Louisot P, Lèbre D, Pradal MB, Got R. [Incorporation of a glucidic precursor of glycoproteins (6-3H-D-glucosamine) in cells cultured in vitro infected by Arbovirus]. C R Acad Hebd Seances Acad Sci D 1969; 269:1140-1. [PMID: 4981442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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14361
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Lipskaia TI. [Role of the acetylcholine system in excitation conduction]. Usp Sovrem Biol 1969; 68:271-87. [PMID: 4322030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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14362
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Davidian N, Penniall R, Elliott WB. Origin of mitochondrial enzymes. 3. Distribution and synthesis of cytochrome c in rat liver tissue. Arch Biochem Biophys 1969; 133:345-58. [PMID: 5820992 DOI: 10.1016/0003-9861(69)90463-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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14363
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Guidollet J, Louisot P. [Role of estradiol and thyroxine in the increase of the number of subcellular sites fixing corticosteroid hormones in the absence of glycoprotein biosynthesis]. C R Acad Hebd Seances Acad Sci D 1969; 269:659-62. [PMID: 4981225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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14364
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14365
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Makinose M. The phosphorylation of the membranal protein of the sarcoplasmic vesicles during active calcium transport. Eur J Biochem 1969; 10:74-82. [PMID: 4242109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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14366
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Suzuki M, Mitropoulos KA, Myant NB. The effect of thyroxine on the distribution of cholesterol in rat liver cells. Biochim Biophys Acta 1969; 184:455-8. [PMID: 5809728 DOI: 10.1016/0304-4165(69)90049-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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14367
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14368
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14369
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MacGregor RR, Mahler HR. Subfractionation and polyacrylamide gel analysis of liver ribonucleic acid from normal and glucocorticoid-treated rats. Biochemistry 1969; 8:3036-49. [PMID: 4390107 DOI: 10.1021/bi00835a053] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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14370
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14371
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Arias IM, Doyle D, Schimke RT. Studies on the synthesis and degradation of proteins of the endoplasmic reticulum of rat liver. J Biol Chem 1969; 244:3303-15. [PMID: 5792661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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14372
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Patriarca P, Carafoli E. A comparative study of the intracellular divalent Ca movements in white and red muscle. Experientia 1969; 25:598-9. [PMID: 5800114 DOI: 10.1007/bf01896534] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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14373
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Abstract
Isolated vesicles of the sarcoplasmic reticulum are known to take up calcium when provided with magnesium adenosine triphosphate as an energy source. Preparations of high activity are obtained by keeping the vesicles in 5 millimolar dithiothreitol (a reagent that reduces disulfide groups), and these preparations retain activity for a week or longer. The highly active preparations lend themselves to a spectrophotometric method for following calcium uptake, and continuous uptake kinetics are readily obtained. Calcium uptake appears to follow Michaelis-Menten kinetics (K(m) = 8x10(-6); V(mas), = 7x10(-7) mole per second per milligram of protein). These preparations are also useful for studying the effects of inhibitors of uptake, such as quinine. When extrapolated to the intact muscle, the results from these isolated vesicles should give a better estimate than has been available of the actual rates of calcium uptake and of the physiological effect of inhibitors of uptake.
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14374
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Poussel H, Arnaudon M. [Modifications of carbohydrate metabolism and the phenomenon of chemical protection against ionizing radiation]. C R Acad Hebd Seances Acad Sci D 1969; 268:2813-6. [PMID: 4389091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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14375
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Medvedeva G, Meissel M, Volkova T. Permeation of oleic acid into the yeast cell. (A cytological study). Antonie Van Leeuwenhoek 1969; 35:Suppl:B27-8. [PMID: 4097188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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14376
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Meezan E, Wu HC, Black PH, Robbins PW. Comparative studies on the carbohydrate-containing membrane components of normal and virus-transformed mouse fibroblasts. II. Separation of glycoproteins and glycopeptides by sephadex chromatography. Biochemistry 1969; 8:2518-24. [PMID: 4307997 DOI: 10.1021/bi00834a039] [Citation(s) in RCA: 191] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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14377
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14378
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Fillios LC, Yokono O, Pronczuk A, Gore I, Satoh T, Kobayakawa K. Synthesis and distribution of cholesterol, and the effect of diet, at the liver endoplasmic reticula and plasma membranes from lean or obese rats. J Nutr 1969; 98:105-12. [PMID: 5784252 DOI: 10.1093/jn/98.1.105] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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14379
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Kerkof PR, Tata JR. The subcellular distribution of 32P-labelled phospholipids, 32P-labelled ribonucleic acid and 125I-labelled odoprotein in pig thyroid slices. Effect in vitro of thyrotrophic hormone and dibutyryl-3',5'-(cyclic)-adeosine onophosphate. Biochem J 1969; 112:729-39. [PMID: 4309673 PMCID: PMC1187777 DOI: 10.1042/bj1120729] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
1. The incorporation in vitro of [(32)P]phosphate into phospholipids and RNA and of [(125)I]iodide into protein-bound iodine by pig thyroid slices incubated for up to 6hr. was studied. The subcellular distribution of the labelled products formed after incubation with radioactive precursor in the nuclear, mitochondrial, smooth-microsomal, rough-microsomal and cell-sap fractions was also studied. 2. Pig thyroid slices actively took up [(32)P]phosphate from the medium during 6hr. of incubation; the rate of incorporation of (32)P into phospholipids was two to five times that into RNA. 3. The uptake of [(125)I]iodide by the slices from the medium was rapid for 4hr. of incubation, 6-10% of the label being incorporated into iodoprotein. 4. Much of the (32)P-labelled phospholipid accumulated in mitochondria and microsomes, whereas the nuclear fraction contained most of the (32)P-labelled RNA. After 2hr. of incubation most of the (32)P-labelled cytoplasmic RNA accumulated in the rough-microsomal fraction. The major site of localization of proteinbound (125)I was the smooth-microsomal fraction, and gradually increasing amounts appeared in the soluble cytoplasm fraction, suggesting a vectorial discharge of [(125)I]iodoprotein (presumably thyroglobulin) from smooth vesicles into the colloid. 5. The addition of 0.1-0.4 unit of thyrotrophic hormone/ml. of incubation medium markedly enhanced the accumulation of (32)P-labelled phospholipids in the microsomal fractions and to a much smaller extent that of (32)P-labelled RNA without any increase in the total uptake of the label. Almost simultaneously the hormone increased the uptake of [(125)I]iodide by the slices and enhanced the accumulation of protein-bound (125)I in the smooth-microsomal fraction. 6. As a function of time of incubation, thyrotrophic hormone had a biphasic effect on [(125)I]iodide uptake and protein-bound (125)I formation, the stimulatory effect being reversed after 4hr. of incubation. 7. 6-N-2'-O-Dibutyryl-3',5'-(cyclic)-AMP, but not 3',5'-(cyclic)-AMP or 5'-AMP, mimicked the action of thyrotrophic hormone on iodine uptake as well as on iodination of protein. On the other hand, the mimicry by 6-N-2'-O-dibutyryl-3',5'-(cyclic)-AMP of the stimulatory effect of thyrotrophic hormone on the formation of labelled thyroid phospholipids and RNA was only an apparent one resulting from an enhanced uptake of [(32)P]phosphate. 8. It is concluded that thyrotrophic hormone causes a co-ordinated increase in the formation or accumulation of phospholipids, RNA and iodoprotein associated with the endoplasmic reticulum, and that 6-N-2'-O-dibutyryl-3',5'-(cyclic)-AMP mimics the more rapid effects of thyrotrophic hormone on transport and metabolic functions of thyroid cells, but does not influence their slower biosynthetic responses to the hormone.
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14380
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Maslova GM, Raikhman LM, Skulachev VP. [Free oxidation in the respiratory chain as a mechanism of oxidative hydroxylation]. Usp Sovrem Biol 1969; 67:400-22. [PMID: 4310784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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14381
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Kuriyama Y, Omura T, Siekevitz P, Palade GE. Effects of phenobarbital on the synthesis and degradation of the protein components of rat liver microsomal membranes. J Biol Chem 1969; 244:2017-26. [PMID: 4181161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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14382
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Wagner RR, Cynkin MA. Enzymatic transfer of 14C-glucosamine from UDP-N-acetyl-14C-glucosamine to endogenous acceptors in a Golgi apparatus-rich fraction from liver. Biochem Biophys Res Commun 1969; 35:139-43. [PMID: 5779141 DOI: 10.1016/0006-291x(69)90495-1] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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14383
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14384
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Hallinan T, Nagley P, Murty CN, Bennett J, Grant JH. The use of radioactive choline as a label for microsomal membranes. II. Studies on membrane-ribosome interaction, subfractionation and function. Biochim Biophys Acta 1969; 173:554-63. [PMID: 5769647 DOI: 10.1016/0005-2736(69)90020-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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14385
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14386
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14387
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Carlier H, Clément G, Noirot-Timothée C. [Application of the technic radioautography with electron microscopy to the study of lipid intestinal absorption in rats]. C R Acad Hebd Seances Acad Sci D 1969; 268:1627-9. [PMID: 4181298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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14388
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14389
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Knoth M, Pattillo RA, Garancis JC, Gey GO, Ruckert AC, Mattingly RF. Ultrastructure and hormone synthesis of choriocarcinoma in vitro. Am J Pathol 1969; 54:479-88. [PMID: 5813147 PMCID: PMC2013485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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14390
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De Luca L, Little EP, Wolf G. Vitamin A and protein synthesis by rat intestinal mucosa. J Biol Chem 1969; 244:701-8. [PMID: 5768865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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14391
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Stein O, Stein Y. Lecithin synthesis, intracellular transport, and secretion in rat liver. IV. A radioautographic and biochemical study of choline-deficient rats injected with choline-3H. J Biophys Biochem Cytol 1969; 40:461-83. [PMID: 5812472 PMCID: PMC2107631 DOI: 10.1083/jcb.40.2.461] [Citation(s) in RCA: 95] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Injection of choline-(3)H into choline-deficient rats resulted in an enhanced incorporation of the label into liver lecithin, as compared to the incorporation of label into liver lecithin of normal rats. The results obtained with the use of different lecithin precursors indicate that in the intact liver cell, both in vivo and in vitro, exchange of choline with phosphatidyl-choline is not significant. The synthesis and secretion of lecithins by the choline-deficient liver compare favorably with the liver of choline-supplemented rats, when both are presented with labeled choline or lysolecithin as lecithin precursors. Radioautography of the choline-deficient liver shows that 5 min after injection of choline-(3)H the newly synthesized lecithin is found in the endoplasmic reticulum (62%), mitochondria (13%), and at the "cell boundary" (20%). The ratio of the specific activity of microsomal and mitochondrial lecithin, labeled with choline, glycerol, or linoleate, was 1.53 at 5 min after injection, but the ratio of the specific activity of phosphatidyl ethanolamine (PE), labeled with ethanolamine, was 5.3. These results indicate that lecithin and PE are synthesized mainly in the endoplasmic reticulum, and are transferred into mitochondria at different rates. The site of a precursor pool of bile lecithin was studied in the intact rat and in the perfused liver. Following labeling with choline-(3)H, microsomal lecithin isolated from perfused liver had a specific activity lower than that of bile lecithin, but the specific activity of microsomal linoleyl lecithin was comparable to that of bile lecithin between 30 and 90 min of perfusion. It is proposed that the site of the bile lecithin pool is located in the endoplasmic reticulum and that the pool consists mostly of linoleyl lecithin.
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14392
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Schiefer HG. Studies on the biosynthesis of the lipid and protein components of a membraneous cytochrome oxidase preparation of rat liver mitochondria in vivo. Hoppe Seylers Z Physiol Chem 1969; 350:235-44. [PMID: 4305405 DOI: 10.1515/bchm2.1969.350.1.235] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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14393
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Foster DW, McWhorter WP. Microsomes, microsomal phospholipids, and fatty acid synthesis. J Biol Chem 1969; 244:260-7. [PMID: 4237579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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14394
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14395
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Ruby JR, Dyer RF, Skalko RG. Continuities between mitochondria and endoplasmic reticulum in the mammalian ovary. Z Zellforsch Mikrosk Anat 1969; 97:30-7. [PMID: 4895252 DOI: 10.1007/bf00331868] [Citation(s) in RCA: 74] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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14396
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Guidollet J, Louisot P. [Biosynthesis of transcortin. Localization of cortisol and corticosterone binding sites in sub-cytoplasmic fractions of rat liver cells]. Clin Chim Acta 1969; 23:121-32. [PMID: 5762121 DOI: 10.1016/0009-8981(69)90018-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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14397
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Porter KR. Independence of fat abosorption and pinocytosis. Fed Proc 1969; 28:35-40. [PMID: 5763997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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14398
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Kratz F. [On the problem of foreign substances detoxification through the liver]. Dtsch Med Wochenschr 1968; 93:2495-8. [PMID: 4881587 DOI: 10.1055/s-0028-1110970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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14399
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Frot-Coutaz J, Louisot P, Got R, Colobert L. [The subcellular sites of 1-14C-L-fucose incorporation in glycoproteins of normal and cancerous cells cultured in vitro]. Experientia 1968; 24:1206-7. [PMID: 5703012 DOI: 10.1007/bf02146622] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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14400
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