scholarly journals A novel nicastrin mutation in a three‐generation Dutch family with hidradenitis suppurativa: a search for functional significance

2020 ◽  
Vol 34 (10) ◽  
pp. 2353-2361 ◽  
Author(s):  
A.R.J.V. Vossen ◽  
K.R. van Straalen ◽  
S.M.A. Swagemakers ◽  
J.E.M.M. de Klein ◽  
A.P. Stubbs ◽  
...  
Keyword(s):  
Functional Significance ◽  
Hidradenitis Suppurativa ◽  
Dutch Family

Functional significance of preserved color patterns of mollusks from the Gosport Sand (Eocene) of Alabama

1988 ◽  
Vol 62 (01) ◽  
pp. 83-87 ◽  
Author(s):  
Patricia H. Kelley ◽  
Charles T. Swann
Keyword(s):  
Functional Morphology ◽  
Functional Significance ◽  
Intraspecific Variability ◽  
Color Pattern ◽  
Color Patterns ◽  
Historical Factors ◽  
Life Mode ◽  
Molluscan Fauna ◽  
Excellent Preservation ◽  
Architectural Constraints

The excellent preservation of the molluscan fauna from the Gosport Sand (Eocene) at Little Stave Creek, Alabama, has made it possible to describe the preserved color patterns of 15 species. In this study the functional significance of these color patterns is tested in the context of the current adaptationist controversy. The pigment of the color pattern is thought to be a result of metabolic waste disposal. Therefore, the presence of the pigment is functional, although the patterns formed by the pigment may or may not have been adaptive. In this investigation the criteria proposed by Seilacher (1972) for testing the functionality of color patterns were applied to the Gosport fauna and the results compared with life mode as interpreted from knowledge of extant relatives and functional morphology. Using Seilacher's criteria of little ontogenetic and intraspecific variability, the color patterns appear to have been functional. However, the functional morphology studies indicate an infaunal life mode which would preclude functional color patterns. Particular color patterns are instead interpreted to be the result of historical factors, such as multiple adaptive peaks or random fixation of alleles, or of architectural constraints including possibly pleiotropy or allometry. The low variability of color patterns, which was noted within species and genera, suggests that color patterns may also serve a useful taxonomic purpose.

Complex Vesicles, Microtubules, and Cytoplasmic Filaments in the Endothelial Cells of Normal Dog Aorta

1968 ◽  
Vol 26 ◽  
pp. 172-173
Author(s):  
C. N. Sun ◽  
J. J. Ghidoni
Keyword(s):  
Electron Microscopy ◽  
Endothelial Cells ◽  
Cross Sections ◽  
Functional Significance ◽  
Tubular Structures ◽  
Aldehyde Fixation ◽  
Cytoplasmic Filaments

Endothelial cells in longitudinal and cross sections of aortas from 3 randomly selected “normal” mongrel dogs were studied by electron microscopy. Segments of aorta were distended with cold cacodylate buffered 5% glutaraldehyde for 10 minutes prior to being cut into small, well oriented tissue blocks. After an additional 1-1/2 hour period in glutaraldehyde, the tissue blocks were well rinsed in buffer and post-fixed in OsO4. After dehydration they were embedded in a mixture of Maraglas, D.E.R. 732, and DDSA.Aldehyde fixation preserves the filamentous and tubular structures (300 Å and less) for adequate demonstration and study. The functional significance of filaments and microtubules has been recently discussed by Buckley and Porter; the precise roles of these cytoplasmic components remains problematic. Endothelial cells in canine aortas contained an abundance of both types of structures.

Surgical treatment of extensive perianal hidradenitis

2020 ◽  
Vol 99 (9) ◽  
Keyword(s):  
Surgical Treatment ◽  
Hidradenitis Suppurativa ◽  
Soft Tissues ◽  
Case Reports ◽  
Radical Excision ◽  
Skin Flaps ◽  
Perianal Area ◽  
Apocrine Glands ◽  
Patient Preparation ◽  
Two Stages

Introduction: Perianal hidradenitis suppurativa is a chronic recurrent inflammatory, suppurative, and fistulising disease of apocrine glands, adjacent anal canal and soft tissues. Perianal area is the second most common affected area after axilla. There are three grades of the disease. Hidradenitis suppurativa represents a chronic, recurrent, deep-seated folliculitis resulting in abscesses, followed by the formation of sinus tracts and subsequent scarring. Perianal hidradenitis suppurativa is the last and the most serious grade of the disease and a specific access is needed for patient preparation and surgical treatment alone. The currently preferred method of treatment for patients with extensive perianal hidradentitis is excision and closure with combination of skin flaps, primary suture and skin graft in one or two stages. Case reports: There are three case reports of perianal hidradenitis suppurativa in this article. The local and overall initial treatment of patients followed by a radical excision and closure with a rotation skin flaps and skin grafts is described. The final results were satisfactory, with no recurrence or serious complication.

Characterization of comorbid conditions burdening hidradenitis suppurativa: a multicentric observational study

2020 ◽  
Vol 155 (3) ◽  
Author(s):  
Andrea Chiricozzi ◽  
Giulia Giovanardi ◽  
Dante R. Caposiena Caro ◽  
Michela Iannone ◽  
Clara De Simone ◽  
...  
Keyword(s):  
Observational Study ◽  
Hidradenitis Suppurativa ◽  
Comorbid Conditions

New insights into mechanism of Notch signaling in hidradenitis suppurativa

2020 ◽  
Vol 155 (4) ◽  
Author(s):  
Emanuele Scala ◽  
Anna Balato ◽  
Claudio Marasca ◽  
Roberta Di Caprio ◽  
Annunziata Raimondo ◽  
...  
Keyword(s):  
Notch Signaling ◽  
Hidradenitis Suppurativa
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