Myofibroblast as a major cellular constituent of villous stroma in human placenta

Placenta ◽  
1985 ◽  
Vol 6 (5) ◽  
pp. 405-415 ◽  
Author(s):  
A.C. Feller ◽  
H. Schneider ◽  
D. Schmidt ◽  
M.R. Parwaresch
Keyword(s):  
Human Placenta ◽  
Cellular Constituent

Scanning electron microscopy of freeze-fractured prescapular lymph node of caprine

1984 ◽  
Vol 42 ◽  
pp. 244-245
Author(s):  
O. Faroon ◽  
F. Al-Bagdadi ◽  
T. G. Snider ◽  
C. Titkemeyer
Keyword(s):  
Lymph Node ◽  
Lymph Nodes ◽  
Lymphatic System ◽  
Three Dimensional ◽  
Meat Products ◽  
The Body ◽  
Morphological Data ◽  
The World ◽  
Cellular Constituent ◽  
Scanning Electron

The lymphatic system is very important in the immunological activities of the body. Clinicians confirm the diagnosis of infectious diseases by palpating the involved cutaneous lymph node for changes in size, heat, and consistency. Clinical pathologists diagnose systemic diseases through biopsies of superficial lymph nodes. In many parts of the world the goat is considered as an important source of milk and meat products.The lymphatic system has been studied extensively. These studies lack precise information on the natural morphology of the lymph nodes and their vascular and cellular constituent. This is due to using improper technique for such studies. A few studies used the SEM, conducted by cutting the lymph node with a blade. The morphological data collected by this method are artificial and do not reflect the normal three dimensional surface of the examined area of the lymph node. SEM has been used to study the lymph vessels and lymph nodes of different animals. No information on the cutaneous lymph nodes of the goat has ever been collected using the scanning electron microscope.

The transfer of pravastatin in the human placenta in women with Antiphospholipid Syndrome

2017 ◽  
Vol 77 (04) ◽  
pp. 379-395
Author(s):  
K Mayer-Pickel ◽  
M Gruber ◽  
B Hirschmugl ◽  
U Lang ◽  
M Cervar-Zivkovic ◽  
...  
Keyword(s):  
Antiphospholipid Syndrome ◽  
Human Placenta

Studies on Chick Embryo Thrombocytes

1963 ◽  
Vol 09 (02) ◽  
pp. 291-299 ◽  
Author(s):  
Helge Stalsberg ◽  
Hans Prydz
Keyword(s):  
Chick Embryo ◽  
Bleeding Time ◽  
In Vivo Microscopy ◽  
Cut Edge ◽  
Vessel Lumen ◽  
Cellular Constituent

SummaryThe formation of hemostatic plugs were studied in the chick embryo through in vivo microscopy, in sections of hemostatic plugs and by measurements of primary bleeding time. Thrombocytes were found to be their only cellular constituent. Ability to form adequate hemostatic plugs appeared rather abruptly in embryos of stages 16-17 and coincided with an increase in thrombocyte precursors (stages III and IV).The thrombocytes initially adhere to the cut edge of the vessel. The extension of the hemostatic plug into the vessel lumen is a secondary step in plug development.

Inhibition of Platelet Aggregation by Human Placenta

1985 ◽  
Vol 54 (02) ◽  
pp. 431-437 ◽  
Author(s):  
M J Dembélé-Duchesne ◽  
A Laghchim Lahlou ◽  
H Thaler-Dao ◽  
A Crastes de Paulet
Keyword(s):  
Fatty Acid ◽  
Platelet Aggregation ◽  
Human Placenta ◽  
Cyclooxygenase Inhibitor ◽  
Synthetase Inhibitor ◽  
Inhibition Of Platelet Aggregation ◽  
Thromboxane Synthetase ◽  
Rabbit Platelets ◽  
High Doses ◽  
Induced Aggregation

SummaryHuman placental cytosol inhibits platelet aggregation induced by high doses of collagen. The aim of this study was to investigate whether this anti-aggregating activity was caused only by the presence of various activities already described in the placenta (an ADP-consuming enzyme, a fatty acid cyclooxygenase inhibitor, and a thromboxane synthetase inhibitor) or whether another factor was present.Heating the cytosol at 50° C for 6 min destroyed the inhibitor of collagen-induced aggregation. ADPase and the AA pathway inhibitors were not modified by this treatment. We therefore show the presence of an additional anti-aggregating factor: it is destroyed by heating at 50° C.We also tested for the presence of an inhibitor of AA release in the placental cytosol using three different methods (rabbit platelets in PRP, washed rabbit platelets, and NRK fibroblasts) but no inhibition could be evidenced.We conclude that this new anti-aggregating factor, which is probably a protein, acts neither through AA release inhibition nor AA cascade inhibition.

METABOLISM OF 17α-HYDROXYPROGESTERONE-4-14C-17α-CAPROATE BY HOMOGENATES OF RAT LIVER AND HUMAN PLACENTA

1961 ◽  
Vol 36 (4) ◽  
pp. 511-519 ◽  
Author(s):  
Margaret Wiener ◽  
Charles I. Lupa ◽  
E. Jürgen Plotz
Keyword(s):  
Rat Liver ◽  
Human Placenta ◽  
Steric Hindrance ◽  
Placental Tissue ◽  
Caproic Acid ◽  
Major Product ◽  
Side Chain ◽  
Anaerobic Conditions ◽  
Prolonged Action ◽  
Long Acting

ABSTRACT 17α-hydroxyprogesterone-4-14C-17α-caproate (HPC), a long-acting progestational agent, was incubated with homogenates of rat liver and human placenta. The rat liver was found to reduce Ring A of HPC under anaerobic conditions to form allopregnane-3β,17α-diol-20-one-17α-caproate and pregnane-3β,17α-diol-20-one-17α-caproate, the allopregnane isomer being the major product. The caproic acid ester was neither removed nor altered during the incubation. Placental tissue did not attack HPC under conditions where the 20-ketone of progesterone was reduced. It is postulated that this absence of attack on the side chain is due to steric hindrance from the caproate ester, and that this may account for the prolonged action of HPC.

Sign in / Sign up

Export Citation Format

Share Document