abstract：:A mutant gene dose-dependent inhibition of cerebellar granule cell neuron survival and neurite growth in dissociated cultures of cerebellum from 7-day-old heterozygous (+/wv) and homozygous (wv/wv) weaver mutant mice (M. Willinger, D. M. Margolis, and R. L. Sidman. (1981), J. Supramol. Struc. 17, 79-86) has previously...

journal_title：Developmental biology

authors： Willinger M,Margolis DM

更新日期：1985-01-01 00:00:00

abstract：:Cultured cells obtained from developing chick heart valvular and septal primordial tissues (cardiac cushions) and myocardium were tested for their capacity to bind, internalize, and degrade hyaluronate. A presumptive lysosomal hyaluronidase capable of hyaluronate degradation has been previously isolated and partially ...

journal_title：Developmental biology

authors： Bernanke DH,Orkin RW

更新日期：1984-12-01 00:00:00

abstract：:Fertilization-related sperm mitochondrial movement occurs at a rate comparable to other actin-myosin-driven movements and is inhibited by cytochalasin B and N-ethyl maleimide in Ascidia ceratodes sperm. F-actin was demonstrated in the tails and mitochondria using NBD-phallacidin fluorescence. Both actin and myosin wer...

journal_title：Developmental biology

authors： Lambert CC,Lambert G

更新日期：1984-12-01 00:00:00

abstract：:The developing chick limb bud contains several stage-specific populations of muscle colony-forming (MCF) cells. The cell lineage relationships of these populations are not completely understood, but previous studies have suggested that there may be at least two myogenic precursor populations present in the limb bud. T...

journal_title：Developmental biology

authors： Seed J,Hauschka SD

更新日期：1984-12-01 00:00:00

abstract：:Isotopes of a number of crustacean myofibrillar proteins have been identified with sodium dodecyl sulfate-polyacrylamide electrophoresis, and their distribution in muscles of the snapping shrimp has been examined. Fast-slow differences in distribution have been observed for myosin light chains and tropomyosin. In cont...

journal_title：Developmental biology

authors： Quigley MM,Mellon D Jr

更新日期：1984-11-01 00:00:00

abstract：:Regulation of peptide neurotransmitter metabolism was examined in dissociated cell cultures of neonatal rat sympathetic and sensory ganglia. Previous studies have shown that pineal gland conditioned medium (PCM) influences substance P (SP) and somatostatin (SS) metabolism in sympathetic neurons in vitro. The present s...

journal_title：Developmental biology

authors： Kessler JA

更新日期：1984-11-01 00:00:00

abstract：:The development of the action potential and responses to neurotransmitters have been described for a population of embryonic spinal neurons developing in vivo. A comparable pattern is seen for spinal neurons developing in dissociated cell culture. The impulse appears very early in this developmental sequence, and the ...

journal_title：Developmental biology

authors： Bixby JL,Spitzer NC

更新日期：1984-11-01 00:00:00

abstract：:The effect of hydrocortisone on the development of dorsal skin was analyzed in the chick embryo by (1) transmission electron microscopy, (2) indirect immunofluorescence histology of extracellular matrix components (collagen types I, III, and IV; fibronectin; and laminin), and (3) quantitative determination of collagen...

journal_title：Developmental biology

authors： Démarchez M,Mauger A,Herbage D,Sengel P

更新日期：1984-11-01 00:00:00

abstract：:Sex in the nematode Caenorhabditis elegans is normally determined by the X chromosome to autosome (X:A) ratio, with XX hermaphrodites and XO males. Previous work has shown that a set of at least four autosomal genes (her-1, tra-2, tra-3, and tra-1) is signaled by the X:A ratio and appears to act in a regulatory pathwa...

journal_title：Developmental biology

authors： Doniach T,Hodgkin J

更新日期：1984-11-01 00:00:00

abstract：:This study tested the proposition that Na/K-ATPase activity could be involved in the morphogenetic aspects of mouse blastocyst formation by facilitating the localization of certain organelles to apposed borders, the production of nascent blastocoele fluid, and cavitation. It was assumed that such Na/K-ATPase activity ...

journal_title：Developmental biology

authors： Wiley LM

更新日期：1984-10-01 00:00:00

abstract：:Full-grown Xenopus oocytes, Stage VI (1200-1300 microns), undergo meiotic maturation when exposed to progesterone. Smaller stage IV (800 microns) and stage V (1000 microns) oocytes remain in prophase arrest when exposed to this steroid. The larger stage VI oocytes undergo an intracellular alkalization from 7.2 to 7.6,...

journal_title：Developmental biology

authors： Wasserman WJ,Houle JG,Samuel D

更新日期：1984-10-01 00:00:00

abstract：:Embryonic 4- to 15-day-old quail ciliary ganglia (CG) were grafted into the neural crest migration pathway of 2-day-old chick embryos at the adrenomedullary level of the neural axis. This back-transplantation results in dispersion of cells of the implanted ganglion, their migration in the host embryo, and subsequent p...

journal_title：Developmental biology

authors： Dupin E

更新日期：1984-10-01 00:00:00

abstract：:Fetal human hepatocytes were isolated by collagenase digestion of liver fragments and cultured either alone or mixed with rat liver epithelial cells. Whereas they did not survive more than 2-3 weeks and showed rapid morphologic and functional alterations in conventional culture, fetal hepatocytes survived and retained...

journal_title：Developmental biology

authors： Guguen-Guillouzo C,Clement B,Lescoat G,Glaise D,Guillouzo A

更新日期：1984-09-01 00:00:00

abstract：:The myelin of the peripheral nervous system from the shiverer mutant mice is characterized by the absence of myelin basic protein, while the other myelin protein components are present at normal levels. Myelin lamella formation is normal in the shiverer mutant. Therefore, by using antiserum against myelin basic protei...

journal_title：Developmental biology

authors： Mikoshiba K,Yokoyama M,Takamatsu K,Tsukada Y,Nomura T

更新日期：1984-09-01 00:00:00

abstract：:Several genomic clones were isolated from a Drosophila library screened with cDNA prepared from abundant adult female mRNA. Cytoplasmic dot hybridizations have shown that the genes in all of these clones are expressed only in posteclosion (stages 8-14) follicles. One set of overlapping clones (lambda 20, lambda 28, an...

journal_title：Developmental biology

authors： Higgins MJ,Walker VK,Holden JA,White BN

更新日期：1984-09-01 00:00:00

abstract：:In Dictyostelium discoideum cyclic AMP (cAMP) metabolism during macrocyst development, i.e., the sexual cycle of this organism, and in giant cells, i.e., fusion products from opposite mating-type cells, was investigated. The pattern of change in cAMP levels during macrocyst development differed considerably from that ...

journal_title：Developmental biology

authors： Abe K,Orii H,Okada Y,Saga Y,Yanagisawa K

更新日期：1984-08-01 00:00:00

abstract：:Neural crest cells migrate extensively through a complex extracellular matrix (ECM) to sites of terminal differentiation. To determine what role the various components of the ECM may play in crest morphogenesis, quail (Coturnix coturnix japonica) neural crest cells have been cultured in three-dimensional hydrated coll...

journal_title：Developmental biology

authors： Tucker RP,Erickson CA

更新日期：1984-08-01 00:00:00

abstract：:Mouse mammary ductal cells cultured in type I collagen gels give rise to three-dimensional multicellular outgrowths consisting of thin spikes which are often branched, and which may have pointed or blunt ends. The significance of these spikes to normal ductal morphogenesis has been unclear, since identical structures ...

journal_title：Developmental biology

authors： Daniel CW,Berger JJ,Strickland P,Garcia R

更新日期：1984-07-01 00:00:00

abstract：:In the small-optic-lobes (sol) and sine oculis (so) mutants of Drosophila melanogaster extensive cell death occurs in the optic lobes during the first half of pupal development. Gynandromorph flies show that the sol mutation acts primarily on cells of the medulla cortex. Degeneration of medullar ganglion cells occurs ...

journal_title：Developmental biology

authors： Fischbach KF,Technau G

更新日期：1984-07-01 00:00:00

abstract：:The relative sizes of the various structures in Hydra attenuata were compared over a broad range of animal sizes to determine in detail the ability to regulate proportions during regeneration. The three components of the head, namely hypostome, tentacles, and tentacle zone from which the tentacles emerge, the body col...

journal_title：Developmental biology

authors： Bode PM,Bode HR

更新日期：1984-06-01 00:00:00

abstract：:Recent studies with amoebae of the Myxomycetes Didymium iridis and Physarum polycephalum reveal that competence to undergo sexual fusion or to differentiate to plasmodia apogamically can be induced by a diffusible factor. Suspension cultures of Didymium amoebae have proven to be a good source of the inducer activity. ...

journal_title：Developmental biology

authors： Nader WF,Shipley GL,Huettermann A,Holt CE

更新日期：1984-06-01 00:00:00

abstract：:We have investigated the sequential changes of acetylcholine receptor (AChR) distribution on identified Xenopus laevis muscle cells in culture before and after innervation. AChRs on muscle cells were stained with tetramethylrhodamine-conjugated alpha-bungarotoxin and the distribution of AChR clusters was examined on a...

journal_title：Developmental biology

authors： Kuromi H,Kidokoro Y

更新日期：1984-05-01 00:00:00

abstract：:A simple assay has been developed to measure cGMP-specific phosphodiesterase (cGPD) activity in crude soluble extracts of amoebae of Dictyostelium discoideum. When amoebae of different wild-type strains were starved on buffered agar, all strains exhibited an 8- to 12-fold increase in cGMP-specific hydrolyzing activity...

journal_title：Developmental biology

authors： Coukell MB,Cameron AM,Pitre CM,Mee JD

更新日期：1984-05-01 00:00:00

abstract：:During its development the epidermis of the pf/pf mutant mouse is invaded by cells from the underlying dermis. These invading cells establish a network of cells including fibroblasts, endothelial cells, and nerve fibers, throughout the epidermis. Subsequent to these events the keratohyalin protein, filaggrin, is drast...

journal_title：Developmental biology

authors： Fisher C,Dale BA,Kollar EJ

更新日期：1984-04-01 00:00:00

abstract：:Myoblasts of the L6 rat cell line were grown in Ham's F12 nutrient medium containing 10% fetal calf serum (F12 + FCS). Although the cells were confluent by 6 days in culture, fusion was not observed even if cultures were maintained for 10-14 days. At least 80% of the cells in such confluent unfused cultures were in th...

journal_title：Developmental biology

authors： Pinset C,Whalen RG

更新日期：1984-04-01 00:00:00

abstract：:The surface of eggs of the ascidian Halocynthia roretzi, observed with SEM, is essentially smooth until immediately before cell division when numerous microvilli appear and remain during cytokinesis. As the dividing blastomeres become closely adherent, however, the microvilli disappear and the eggs recover their smoot...

journal_title：Developmental biology

authors： Satoh N,Deno T

更新日期：1984-04-01 00:00:00

abstract：:Horseradish peroxidase (HRP) was used as an intracellular lineage tracer in two experiments designed to reveal the sites of origin of cells that formed the duplicate embryo which developed in relation to an organizer grafted in the ventral marginal zone (VMZ) of Xenopus laevis embryos. In the first experiment a dorsal...

journal_title：Developmental biology

authors： Jacobson M

更新日期：1984-03-01 00:00:00

abstract：:Trichosia pubescens larvae were ligated at different prepupal developmental stages in order to investigate whether ecdysterone acts just as a trigger or whether its presence in the hemolymph is constantly necessary for the induction of the late puffs, in particular the DNA puffs. The larvae were ligated in the middle ...

journal_title：Developmental biology

authors： Amabis DC,Amabis JM

更新日期：1984-03-01 00:00:00

abstract：:Immature, Stage VI oocytes of Xenopus laevis fail to activate (i.e., to propagate a cortical reaction and elevate a fertilization envelope) when pricked or exposed to A23187. We determined the times during maturation when immature oocytes treated with progesterone in vitro developed the capacity to respond to pricking...

journal_title：Developmental biology

authors： Charbonneau M,Grey RD

更新日期：1984-03-01 00:00:00

abstract：:One rapid response of starfish oocytes to the maturation-inducing hormone, 1-methyladenine (1-MA), is the formation of transient actin-filled spikes on the cell surface. The presence and distribution of G- and F-actin and several actin-associated proteins were examined in cortices isolated from oocytes before, during,...

journal_title：Developmental biology

authors： Otto JJ,Schroeder TE

更新日期：1984-02-01 00:00:00

abstract：:We have used in situ hybridization and RNA blotting analysis to compare the timing of accumulation of poly(A) and alpha-subtype histone mRNA during oogenesis in the sea urchin Strongylocentrotus purpuratus. In situ hybridization with 3H-poly(U) shows that the content of poly(A) in the developing oocyte increases four-...

journal_title：Developmental biology

authors： Angerer LM,DeLeon DV,Angerer RC,Showman RM,Wells DE,RafF RA

更新日期：1984-02-01 00:00:00

abstract：:A chronic neuromuscular blockade during those embryonic stages when naturally occurring spinal motoneuron death occurs, results in the prevention of this cell loss. The excess motoneurons are maintained as long as the neuromuscular blockade is continued; once embryonic neuromuscular activity resumes, however, the exce...

journal_title：Developmental biology

authors： Oppenheim RW

更新日期：1984-01-01 00:00:00

abstract：:These studies were designed to test the hypothesis that sperm nuclear decondensation and male pronuclear formation during hamster fertilization depend upon the ability of the fertilized oocyte to reduce sperm nuclear disulfide bonds. In a first series of experiments, treatment of mature oocytes with the sulfhydryl blo...

journal_title：Developmental biology

authors： Perreault SD,Wolff RA,Zirkin BR

更新日期：1984-01-01 00:00:00

abstract：:The distribution of microtubules and microtubule organizing centers in the events leading up to the establishment of the first asymmetric cleavage furrow in nematode embryos was followed using indirect immunofluorescence of antibodies to tubulin. Oocytes arrest in meiotic prophase then undergo two meiotic reduction di...

journal_title：Developmental biology

authors： Albertson DG

更新日期：1984-01-01 00:00:00

abstract：:Pole cell formation in embryos of the parthenogenetic midge, Smittia sp., can be delayed or inhibited by irradiation of the posterior egg pole with ultraviolet light (uv). This leaves the schedule of nuclear divisions and chromosome eliminations virtually unaffected. However, uv irradiation delays the precocious migra...

journal_title：Developmental biology

authors： von Brunn A,Kalthoff K

更新日期：1983-12-01 00:00:00

abstract：:Epidermal growth factor (EGF), a low-molecular-weight polypeptide (G. Carpenter and S. Cohen, 1979, Annu. Rev. Biochem. 48, 193-216), stimulates the proliferation and keratinisation of cultured embryonic epidermis (S. Cohen, 1965, Dev. Biol. 12, 394-407) and promotes epidermal growth, thickening, and keratinisation wh...

journal_title：Developmental biology

authors： Green MR,Basketter DA,Couchman JR,Rees DA

更新日期：1983-12-01 00:00:00

abstract：:The embryonic cell lineage of Caenorhabditis elegans has been traced from zygote to newly hatched larva, with the result that the entire cell lineage of this organism is now known. During embryogenesis 671 cells are generated; in the hermaphrodite 113 of these (in the male 111) undergo programmed death and the remaind...

journal_title：Developmental biology

authors： Sulston JE,Schierenberg E,White JG,Thomson JN

更新日期：1983-11-01 00:00:00

abstract：:These studies examined the potential for reorganization and differentiation of dissociated 18-day fetal rat intestine. Cultures of trypsin-dissociated fetal intestine were maintained in vitro for 1 week on a three-dimensional matrix, then transplanted into syngeneic hosts. When harvested after 4 weeks, these transplan...

journal_title：Developmental biology

authors： Montgomery RK,Zinman HM,Smith BT

更新日期：1983-11-01 00:00:00

abstract：:In the full grown oocyte of Xenopus laevis, a sodium permeability can be induced by depolarization to positive potential with current injection. Voltage-clamp analysis has shown that depolarization causes a long-lasting modification of the membrane during which voltage-gated sodium channels become functional. In the p...

journal_title：Developmental biology

authors： Baud C

更新日期：1983-10-01 00:00:00

abstract：:Synapse elimination was examined in the developing frog cutaneous pectoris muscle using histological and electrophysiological techniques. Morphological synapse elimination occurred in two phases. The first phase, which began at the time of metamorphosis and continued until the second to third postmetamorphic week, was...

journal_title：Developmental biology

authors： Morrison-Graham K

更新日期：1983-10-01 00:00:00