Results 251 to 260 of about 113,853 (284)

Mesodern-inducing factors and mesodermal patterning

Current Opinion in Cell Biology, 1995
Identification of the signalling molecules involved in mesoderm formation in amphibian embryos still presents problems. None of the original candidates, such as activin, have been definitively ruled out, and new factors, such as the nodal-related genes, have come on to the scene. Of the original candidates, activin has been definitively shown to act as
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The Development of the Mesoderm in Gastropods [PDF]

Nature, 1930
IN 1891 Erlanger reported that in the freshwater snail Paludina the mesoderm was formed as a hollow pouch budded out from the primitive gut or archenteron. From a portion of this pouch, which may be regarded as the secondary body-cavity or caelom, the pericardial sac was formed. Such a mode of the formation of the caelom, though normal in Echinodermata
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Mixed mesodermal tumours of the ureter

Journal of Surgical Oncology, 1991
AbstractThis report is of a 78 year‐old male with a mixed mesodermal tumour of the left ureter.A comparison of all reported patients with such neoplasms has been made in the discussion, in an attempt at characterization of this neoplasm.
John A. Thomas, Shameem Shariff, Usha Kini   +2 more
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Specification and segmentation of the paraxial mesoderm

Anatomy and Embryology, 1994
Somite formation in the mouse embryo begins with the recruitment of mesenchymal cells into the paraxial mesoderm. Cells destined for the paraxial mesoderm are recruited from a progenitor population found first in the embryonic ectoderm and later in the primitive streak and the tail bud.
Patrick P.L. Tam, Paul A. Trainor
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Benign Mesodermal Polyp in Childhood

Journal of Urology, 1975
A ureteral fibrous polyp presenting as ureteropelvic junction obstruction in a 10-year-old boy is reported. These neoplasms are uncommon, especially in children. If a salvageable kidney is present, resection of the tumor and adjacent ureter is proper therapy.
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Markers of vertebrate mesoderm induction

Current Opinion in Genetics & Development, 1997
Mesoderm formation is the first major differentiative event in vertebrate development. Many new mesoderm-specific genes have recently been described in the mouse, chick, frog and fish and belong to classes comprising T-domain genes, homeobox genes and those encoding secreted proteins.
Kenneth Ryan, John B. Gurdon, Fiona A. Stennard   +2 more
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Dorsalization of mesoderm induction by lithium

Developmental Biology, 1989
Lithium dorsalizes the body plan of Xenopus embryos when administered at the 32-cell stage (K.R. Kao and R.P. Elinson, 1988, Dev. Biol. 127, 64-77). In this paper, we have attempted to determine the effects of lithium on mesoderm induction, in order to localize the target of action of lithium.
Richard P. Elinson, Kenneth R. Kao
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Gene activation in the amphibian mesoderm

Development, 1991
Abstract Cell potency is progressively restricted in amphibian development by a series of cellular interactions called inductions. The mesoderm is believed to develop in response to the earliest known induction, in which vegetal cells of the blastula divert overlying animal hemisphere cells away from epidermal and towards mesodermal ...
N D, Hopwood, J B, Gurdon
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Mixed mesodermal tumor of the ovary

American Journal of Obstetrics and Gynecology, 1967
T H R E E examples of mixed mesodermal tumor, occurring in the ovary, have been described-a rha~omyosar~oma,3 carcinosarcoma,* and mixed mesodermal tumor,1 the last two being associated with endometriosis. Since the ovary is not of Miillerian origin, it has been suggested that mixed mesodermal tumors arising in the ovary do so from ectopic Miillerian ...
J.A. Hayes, J. Gardiner, A.R. Edghill
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Mesodermal alterations induced by hypervitaminosis A

Development, 1966
ABSTRACT The administration of a single dose (20000 u) of vitamin A by gavage to the pregnant hamster is followed almost immediately by changes in the mesoderm of the embryos. These changes appear 6 h after the administration and after 10 h they have reached their maximum severity.
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