Human foetal kidney explant in serum-free organ culture

1987 ◽  
Vol 176 (1) ◽  
pp. 105-114 ◽  
Author(s):  
Normand Bri�re
Keyword(s):  
Organ Culture ◽  
Serum Free ◽  
Foetal Kidney

scholarly journals EFFECTS OF HYDROCORTISONE ON HUMAN FOETAL KIDNEY IN SERUM-FREE ORGAN CULTURE

1987 ◽  
Vol 21 (4) ◽  
pp. 209A-209A
Author(s):  
Lyne Bertrand ◽  
Normand Brière
Keyword(s):  
Organ Culture ◽  
Serum Free ◽  
Foetal Kidney

Effect of hydrocortisone on the maturation of human foetal kidney explants in serum-free organ culture

1989 ◽  
Vol 67 (2-3) ◽  
pp. 121-127 ◽  
Author(s):  
Lyne Bertrand ◽  
Normand Brière
Keyword(s):  
Organ Culture ◽  
Brush Border ◽  
In Vitro Maturation ◽  
Kidney Development ◽  
Thymidine Incorporation ◽  
Brush Border Enzymes ◽  
Serum Free ◽  
Foetal Kidney ◽  
Developing Kidney

The effect of hydrocortisone on the in vitro maturation of human foetal kidney was investigated. Following legal therapeutic abortions, explants of renal cortex from foetuses aged 13–18 weeks were cultured for 5 days in serum-free Leibovitz's L-15 medium at 37 °C in a mixture of 95% air – 5% CO2, without hormone (controls) or with hydrocortisone at concentrations of 12.5, 25, or 50 ng/mL, which are the levels representative of different gestational periods. During the studied period of culture, the overall architecture of the renal structures was preserved without any evident signs of nephrogenesis induced by hydrocortisone. DNA synthesis was measured by incorporation of [3H]thymidine and was stimulated on day 5 by 80% with the addition of hydrocortisone at 12.5 ng/mL, and by 131% with 50 ng/mL. In autoradiograms, the sites of [3H]thymidine incorporation were the same after hydrocortisone addition, but the number of labelled nuclei was higher in 5-day explants supplemented with hydrocortisone at 50 ng/mL. The activities of some brush border enzymes (leucylnaphthylamidase, maltase, and alkaline phosphatase) were not influenced by hydrocortisone when compared with controls. Trehalase activity was decreased on day 5 with 12.5 and 50 ng/mL. A concentration of 12.5 ng/mL diminished γ-glutamyltransferase activity by 29% on day 5. The incorporation of [3H]leucine into proteins was not influenced by any concentration of the glucocorticoid hormone. This study indicates that hydrocortisone directly influences cell proliferation and certain brush border enzymic activities in human developing kidney maintained in organ culture.Key words: hydrocortisone, organ culture, human foetus, kidney, development.

THE INFLUENCE OF SERUM ON THE UPTAKE, CONVERSION AND ACTION OF DIHYDROTESTOSTERONE IN RAT PROSTATE GLANDS IN ORGAN CULTURE

1975 ◽  
Vol 64 (2) ◽  
pp. 289-297 ◽  
Author(s):  
ILSE LASNITZKI ◽  
HILARY R. FRANKLIN
Keyword(s):  
Organ Culture ◽  
Horse Serum ◽  
Target Tissue ◽  
Serum Free Medium ◽  
Free Medium ◽  
Serum Free ◽  
Human Pregnancy ◽  
Human Male ◽  
Columnar Cells

SUMMARY The influence of serum on the uptake, conversion and action of dihydrotestosterone in relation to the sex steroid binding protein, TeBG, has been investigated in rat ventral prostates in organ culture. The organs were incubated with [1,2-3H]dihydrotestosterone in: (1) serum-free medium, (2) horse serum, foetal and newborn bovine serum or (3) human male and human pregnancy serum. With all sera the uptake of dihydrotestosterone fell with rising serum concentration, at first steeply and then more gradually. At the same concentration, the uptake was significantly lower in explants incubated with human pregnancy serum than in those kept with human male serum. The conversion of dihydrotestosterone to androstanediol followed the same pattern and less androstanediol was formed in the presence of pregnancy serum. Since pregnancy serum contains higher amounts of TeBG than male serum, the lowered uptake suggests that only the free hormone was available to the target organ. Addition of unlabelled dihydrotestosterone resulted in a higher uptake than that measured in explants incubated with the labelled steroid only. The effect of the human sera on uptake and conversion was correlated with the androgenic activity of dihydrotestosterone applied at physiological concentrations and expressed as the percentage of secretory columnar cells present. The degree of maintenance closely corresponded to the uptake of the hormone. In serum-free medium, the number of columnar cells approached the values found in vivo, with male serum their number, though reduced, was still substantial, with pregnancy serum it was extremely low. It is concluded that the amounts of TeBG present in serum regulate the supply of the hormone to the target tissue and thus control its biological action.

scholarly journals Development of a Short-Term Canine Full-Thickness Skin Organ Culture Method under Serum-Free Conditions

2016 ◽  
Vol 11 (2) ◽  
pp. 61-69 ◽  
Author(s):  
Francesca Abramo ◽  
Andrea Pirone ◽  
Carla Lenzi ◽  
Maria Federica della Valle ◽  
Silvia Vidali ◽  
...  
Keyword(s):  
Organ Culture ◽  
Culture Method ◽  
Full Thickness ◽  
Short Term ◽  
Serum Free ◽  
Full Thickness Skin ◽  
Thickness Skin ◽  
Serum Free Conditions ◽  
Skin Organ Culture

Metanephric development in serum-free organ culture

In Vitro ◽  
1982 ◽  
Vol 18 (8) ◽  
pp. 675-682 ◽  
Author(s):  
Ellis D. Avner ◽  
Demetrius Ellis ◽  
Thomas Temple ◽  
Ronald Jaffe
Keyword(s):  
Organ Culture ◽  
Serum Free

scholarly journals IGF-I-induced enhancement of contractile response in organ-cultured aortae from diabetic rats is mediated by sustained thromboxane A2 release from endothelial cells

2005 ◽  
Vol 186 (2) ◽  
pp. 367-376 ◽  
Author(s):  
Tsuneo Kobayashi ◽  
Takayuki Matsumoto ◽  
Katsuo Kamata
Keyword(s):  
Endothelial Cells ◽  
Organ Culture ◽  
Contractile Response ◽  
Diabetic Rats ◽  
Receptor Expression ◽  
Diabetic Rat ◽  
Serum Free Medium ◽  
Free Medium ◽  
Serum Free ◽  
Igf I

We have investigated the mechanisms underlying the changes in vascular contractile responsiveness induced by insulin and IGF-I in established streptozotocin-induced diabetic rats. The contractile response to noradrenaline (NA) in organ-cultured diabetic rat aortae cultured with insulin or IGF-I was significantly greater than the corresponding responses in (a) diabetic rat aortae cultured in serum-free medium and (b) control rat aortae cultured with insulin or IGF-I. In aortae from which the endothelium was removed after organ culture the contractile response to NA was greater in those cultured with insulin or IGF-I than in those cultured in serum-free medium. This was not true of aortae endothelium denuded before organ culture. The IGF-I-induced enhancement was prevented by treatment with indomethacin (cyclo-oxygenase inhibitor), SQ29548 (thromboxane (TX) A2 receptor antagonist) or fregrelate (TXA2 synthase inhibitor). IGF-I-induced production of TXB2, a metabolite of TXA2, was greater in diabetic than in control aortae and was attenuated by endothelium denudation, indomethacin or AG1024 (IGF-I receptor inhibitor). The expression of the protein and mRNA for the IGF-I receptor (as assessed by RT-PCR and immunohistochemistry) was markedly increased within endothelial cells in diabetic aortae but only slightly increased within smooth muscle cells (versus control rat aortae). Thus, the NA-induced contractile response in aortae from diabetic rats was enhanced by both insulin and IGF-I and this enhancement may be mediated by sustained cyclo-oxygenase-dependent TXA2 production from endothelial cells. The observed enhancement of IGF-I receptor expression within endothelial cells may be causally related to the potentiation of vascular contractility and the increase in TXA2 production.

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