Collagen formation and calcification in teleost scales

1968 ◽  
Vol 93 (4) ◽  
pp. 571-582 ◽  
Author(s):  
G. A. Brown ◽  
S. R. Wellings
Keyword(s):  
Collagen Formation ◽  
Teleost Scales

Ultrastructural analysis of collagen formation in the developing primate amnion

1990 ◽  
Vol 48 (3) ◽  
pp. 106-107
Author(s):  
Barry F. King ◽  
Grete N. Fry
Keyword(s):  
Golgi Apparatus ◽  
Collagen Fibril ◽  
Fibril Formation ◽  
Amniotic Cavity ◽  
Cytological Evidence ◽  
Mammalian Embryo ◽  
Intracellular Location ◽  
Collagen Formation ◽  
Amniotic Epithelium ◽  
Extraembryonic Mesoderm

The amnion surrounding the mammalian embryo consists of the amniotic epithelium facing the amniotic cavity, a layer of extraembryonic mesoderm bordering the exocoelom and an intervening layer of extracellular matrix (Fig. 1). During gestation the amnion expands remarkably to acommodate the rapidly growing embryo. In this study we have examined the process of collagen fibril formation in the developing amnion of the rhesus monkey between 20 and 60 days of gestation.Most cytological evidence of collagen fibril formation was observed in association with the extraembryonic mesodermal cells rather than the amniotic epithelium. The mesodermal cells h ad abundant cisternae of rough endoplasmic reticulum and a prominent Golgi apparatus. Elongated secretory vacuoles were associated with the Golgi apparatus and often contained parallel aggregates of fine filaments (Fig. 2). In some secretory vacuoles, periodic densities also were observed. Some striated collagen fibrils were observed in an apparent intracellular location in long, membrane-limited compartments (Fig. 3). Still other striated fibrils were observed in dense bodies, presumably lysosomes (Fig. 4).

scholarly journals The Capabilities of Amlodipine/Lisinopril Single-Pill Combination in the Treatment of Newly Diagnosed Arterial Hypertension in a Middle-Aged Patient (Case Report)

2020 ◽  
Vol 16 (2) ◽  
pp. 221-230
Author(s):  
A. I. Kochetkov ◽  
M. V. Lopukhina ◽  
E. A. Kotaeva ◽  
A. A. Kirichenko ◽  
O. D. Ostroumova
Keyword(s):  
Blood Pressure ◽  
Arterial Hypertension ◽  
Left Ventricular ◽  
Favorable Effect ◽  
Newly Diagnosed ◽  
Functional Changes ◽  
Collagen Formation ◽  
Cardiovascular Morbidity And Mortality ◽  
Single Pill ◽  
Left Atrial Stiffness

Arterial hypertension (AH) is one of the most significant modifiable risk factors that increase cardiovascular morbidity and mortality worldwide, including Russia. The complex of structural and functional changes in the heart that occurs during AH consists not only in the formation of left ventricular (LV) myocardial hypertrophy, but also in the myocardial stiffness increasing due to collagen formation and cardiomyocytes apoptosis. These abnormalities are substrate for diastolic function disturbances, electrical myocardial instability and ischemia. The article provides a clinical case of amlodipine/lisinopril single-pill combination (A/L SPC) use in real clinical practice in a patient with stage II grade 2 newly diagnosed AH and its effect on blood pressure and echocardiographic myocardial fibrosis markers, including speckle tracking parameters The high antihypertensive efficacy of A/L SPC, a favorable effect on blood pressure circadian rhythm, as well as pronounced target-organ protective properties, in particular the ability to reduce LV and left atrial stiffness, were demonstrated. So, we conclude that A/L SPC improve the elastic properties of the left heart.

scholarly journals Restoration of Osteogenesis by CRISPR/Cas9 Genome Editing of the Mutated COL1A1 Gene in Osteogenesis Imperfecta

2021 ◽  
Vol 10 (14) ◽  
pp. 3141
Author(s):  
Hyerin Jung ◽  
Yeri Alice Rim ◽  
Narae Park ◽  
Yoojun Nam ◽  
Ji Hyeon Ju
Keyword(s):  
Osteogenesis Imperfecta ◽  
Type I Collagen ◽  
Disease Modeling ◽  
Bone Fragility ◽  
Osteogenic Potential ◽  
Type I ◽  
Gene Correction ◽  
Col1a1 Gene ◽  
Collagen Formation

Osteogenesis imperfecta (OI) is a genetic disease characterized by bone fragility and repeated fractures. The bone fragility associated with OI is caused by a defect in collagen formation due to mutation of COL1A1 or COL1A2. Current strategies for treating OI are not curative. In this study, we generated induced pluripotent stem cells (iPSCs) from OI patient-derived blood cells harboring a mutation in the COL1A1 gene. Osteoblast (OB) differentiated from OI-iPSCs showed abnormally decreased levels of type I collagen and osteogenic differentiation ability. Gene correction of the COL1A1 gene using CRISPR/Cas9 recovered the decreased type I collagen expression in OBs differentiated from OI-iPSCs. The osteogenic potential of OI-iPSCs was also recovered by the gene correction. This study suggests a new possibility of treatment and in vitro disease modeling using patient-derived iPSCs and gene editing with CRISPR/Cas9.

scholarly journals Histopathological specialized staining of oral lichen planus-induced fibrotic changes and surgical treatment of associated restricted mouth opening: a case report

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Atsushi Shudo
Keyword(s):  
Surgical Treatment ◽  
Lichen Planus ◽  
Oral Lichen Planus ◽  
Histopathological Examination ◽  
Mouth Opening ◽  
Ki 67 ◽  
Collagen Formation ◽  
Immune Mediated ◽  
Cytokeratin 13 ◽  
Oral Lichen

Abstract Background Oral lichen planus is a chronic inflammatory and immune-mediated disease that affects the oral mucosa. Recent findings have suggested that oral lichen planus is often associated with submucosal fibrotic changes. Fibrotic changes in the buccal submucosa may cause restricted mouth opening. This report discusses the histopathological examination (including specialized staining) and surgical treatment for oral lichen planus-induced fibrotic changes. Case presentation Here, we describe a 63-year-old woman who had oral lichen planus with fibrotic changes. Her maximum mouth opening distance was approximately 30 mm due to submucosal fibrotic changes, and she exhibited gradual fibrosis progression. Histological examinations were performed to assess the oral lichen planus-induced fibrotic changes. Then, double Z-plasty were performed as treatment for restricted mouth opening. The immunohistochemical staining results were negative for cytokeratin 13 and positive in some layers for cytokeratin 17 and Ki-67/MIB-1. Masson's trichrome staining showed enhanced collagen formation. Postoperative mouth opening training enabled the patient to achieve a mouth opening distance of > 50 mm. Conclusion Our findings suggest that histopathological examination with specialized staining can aid in the evaluation of oral lichen planus-induced fibrotic changes, and that Z-plasty is effective for the treatment of restricted mouth opening due to oral lichen planus.

miR-506-3p regulates TGF- 1 and affects dermal fibroblast proliferation, migration and collagen formation after thermal injury

2021 ◽  
pp. 101548
Author(s):  
Meiyue Yang ◽  
Zhibo Yang ◽  
Xinwen Pan ◽  
Xiangjun Huang ◽  
Lei Yang ◽  
...  
Keyword(s):  
Thermal Injury ◽  
Dermal Fibroblast ◽  
Fibroblast Proliferation ◽  
Collagen Formation
Sign in / Sign up

Export Citation Format

Share Document