Organ specification-growth control connection: New in-sightsfrom the Drosophila eye-antennal disc

2005 ◽  
Vol 232 (3) ◽  
pp. 673-684 ◽  
Author(s):  
María Domínguez ◽  
Fernando Casares
Keyword(s):  
Growth Control ◽  
Drosophila Eye ◽  
Antennal Disc

scholarly journals Growth control by a moving morphogen gradient during Drosophila eye development

Development ◽  
2014 ◽  
Vol 141 (9) ◽  
pp. 1884-1893 ◽  
Author(s):  
Ortrud Wartlick ◽  
Frank Jülicher ◽  
Marcos Gonzalez-Gaitan
Keyword(s):  
Eye Development ◽  
Growth Control ◽  
Morphogen Gradient ◽  
Drosophila Eye

scholarly journals Ras/MEK/MAPK-mediated regulation of heparin sulphate proteoglycans promotes retinal fate in the Drosophila eye–antennal disc

2015 ◽  
Vol 402 (1) ◽  
pp. 109-118 ◽  
Author(s):  
Vilaiwan M. Fernandes ◽  
Tirthadipa Pradhan-Sundd ◽  
Jessica A. Blaquiere ◽  
Esther M. Verheyen
Keyword(s):  
Drosophila Eye ◽  
Antennal Disc

scholarly journals Odd paired transcriptional activation of decapentaplegic in the Drosophila eye/antennal disc is cell autonomous but indirect

2010 ◽  
Vol 343 (1-2) ◽  
pp. 167-177 ◽  
Author(s):  
Aditya Sen ◽  
Brian G. Stultz ◽  
Heuijung Lee ◽  
Deborah A. Hursh
Keyword(s):  
Transcriptional Activation ◽  
Drosophila Eye ◽  
Antennal Disc

Quantitative EM of gap junction distribution in mutant drosophila wing discs

1983 ◽  
Vol 41 ◽  
pp. 720-721
Author(s):  
J.S. Ryerse
Keyword(s):  
Gap Junctions ◽  
Growth Control ◽  
Intercellular Junctions ◽  
Wing Disc ◽  
En Bloc ◽  
Metabolic Cooperation ◽  
Drosophila Wing ◽  
Adult Wing ◽  
Wing Discs ◽  
Wing Pouch

Gap junctions are intercellular junctions found in both vertebrates and invertebrates through which ions and small molecules can pass. Their distribution in tissues could be of critical importance for ionic coupling or metabolic cooperation between cells or for regulating the intracellular movement of growth control and pattern formation factors. Studies of the distribution of gap junctions in mutants which develop abnormally may shed light upon their role in normal development. I report here the distribution of gap junctions in the wing pouch of 3 Drosophila wing disc mutants, vg (vestigial) a cell death mutant, 1(2)gd (lethal giant disc) a pattern abnormality mutant and 1(2)gl (lethal giant larva) a neoplastic mutant and compare these with wildtype wing discs.The wing pouch (the anlagen of the adult wing blade) of a wild-type wing disc is shown in Fig. 1 and consists of columnar cells (Fig. 5) joined by gap junctions (Fig. 6). 14000x EMs of conventionally processed, UA en bloc stained, longitudinally sectioned wing pouches were enlarged to 45000x with a projector and tracings were made on which the lateral plasma membrane (LPM) and gap junctions were marked.

Ultrastructural features of prognostic significance in human oral cancer

1992 ◽  
Vol 50 (1) ◽  
pp. 618-619
Author(s):  
Karvita B. Ahluwalia ◽  
Nidhi Sharma
Keyword(s):  
Oral Cancer ◽  
Squamous Cell ◽  
Common Knowledge ◽  
Prognostic Significance ◽  
Growth Control ◽  
Terminal Differentiation ◽  
Squamous Cell Carcinomas ◽  
Effective Therapy ◽  
Invasive Potential ◽  
Biological Behaviour

It is common knowledge that apparently similar tumors often show different responses to therapy. This experience has generated the idea that histologically similar tumors could have biologically distinct behaviour. The development of effective therapy therefore, has the explicit challenge of understanding biological behaviour of a tumor. The question is which parameters in a tumor could relate to its biological behaviour ? It is now recognised that the development of malignancy requires an alteration in the program of terminal differentiation in addition to aberrant growth control. In this study therefore, ultrastructural markers that relate to defective terminal differentiation and possibly invasive potential of cells have been identified in human oral leukoplakias, erythroleukoplakias and squamous cell carcinomas of the tongue.

Microstructural investigation of surface roughness in MBE-grown AlAs

1995 ◽  
Vol 53 ◽  
pp. 454-455
Author(s):  
R. Rajesh ◽  
R. Droopad ◽  
C. H. Kuo ◽  
R. W. Carpenter ◽  
G. N. Maracas
Keyword(s):  
Thin Film ◽  
Real Time ◽  
Growth Control ◽  
Native Oxide ◽  
Effusion Cell ◽  
Surface Oxide Layer ◽  
Microstructural Investigation ◽  
Mbe Growth ◽  
Film Substrate ◽  
And Control

Knowledge of material pseudodielectric functions at MBE growth temperatures is essential for achieving in-situ, real time growth control. This allows us to accurately monitor and control thicknesses of the layers during growth. Undesired effusion cell temperature fluctuations during growth can thus be compensated for in real-time by spectroscopic ellipsometry. The accuracy in determining pseudodielectric functions is increased if one does not require applying a structure model to correct for the presence of an unknown surface layer such as a native oxide. Performing these measurements in an MBE reactor on as-grown material gives us this advantage. Thus, a simple three phase model (vacuum/thin film/substrate) can be used to obtain thin film data without uncertainties arising from a surface oxide layer of unknown composition and temperature dependence.In this study, we obtain the pseudodielectric functions of MBE-grown AlAs from growth temperature (650°C) to room temperature (30°C). The profile of the wavelength-dependent function from the ellipsometry data indicated a rough surface after growth of 0.5 μm of AlAs at a substrate temperature of 600°C, which is typical for MBE-growth of GaAs.

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