scholarly journals Calpain-Mediated Positional Information Directs Cell Wall Orientation to Sustain Plant Stem Cell Activity, Growth and Development

2015 ◽  
Vol 56 (9) ◽  
pp. 1855-1866 ◽  
Author(s):  
Zhe Liang ◽  
Roy C. Brown ◽  
Jennifer C. Fletcher ◽  
Hilde-Gunn Opsahl-Sorteberg
Keyword(s):  
Cell Wall ◽  
Stem Cell ◽  
Growth And Development ◽  
Cell Activity ◽  
Positional Information ◽  
Stem Cell Activity ◽  
Plant Stem

scholarly journals Positional information specifies the site of organ regeneration and not tissue maintenance in planarians

eLife ◽  
2018 ◽  
Vol 7 ◽  
Author(s):  
Eric M Hill ◽  
Christian P Petersen
Keyword(s):  
Stem Cell ◽  
Cell Activity ◽  
Positional Information ◽  
Tissue Homeostasis ◽  
Target Site ◽  
Maintenance And Repair ◽  
Organ Regeneration ◽  
Stem Cell Activity ◽  
Factor Expression

Most animals undergo homeostatic tissue maintenance, yet those capable of robust regeneration in adulthood use mechanisms significantly overlapping with homeostasis. Here we show in planarians that modulations to body-wide patterning systems shift the target site for eye regeneration while still enabling homeostasis of eyes outside this region. The uncoupling of homeostasis and regeneration, which can occur during normal positional rescaling after axis truncation, is not due to altered injury signaling or stem cell activity, nor specific to eye tissue. Rather, pre-existing tissues, which are misaligned with patterning factor expression domains, compete with properly located organs for incorporation of migratory progenitors. These observations suggest that patterning factors determine sites of organ regeneration but do not solely determine the location of tissue homeostasis. These properties provide candidate explanations for how regeneration integrates pre-existing tissues and how regenerative abilities could be lost in evolution or development without eliminating long-term tissue maintenance and repair.

scholarly journals Positional information specifies the site of organ regeneration and not tissue maintenance in planarians

2018 ◽  
Author(s):  
Eric M. Hill ◽  
Christian P. Petersen
Keyword(s):  
Stem Cell ◽  
Cell Activity ◽  
Positional Information ◽  
Tissue Homeostasis ◽  
Target Site ◽  
Maintenance And Repair ◽  
Organ Regeneration ◽  
Stem Cell Activity ◽  
Factor Expression

AbstractMost animals undergo homeostatic tissue maintenance, yet those capable of robust regeneration in adulthood use mechanisms significantly overlapping with homeostasis. Here we show in planarians that modulations to body-wide patterning systems shift the target site for eye regeneration while still enabling homeostasis of eyes outside this region. The uncoupling of homeostasis and regeneration, which can occur during normal positional rescaling after axis truncation, is not due to altered injury signaling or stem cell activity, nor specific to eye tissue. Rather, pre-existing tissues, which are misaligned with patterning factor expression domains, compete with properly located organs for incorporation of migratory progenitors. These observations suggest that patterning factors determine sites of organ regeneration but do not solely determine the location of tissue homeostasis. These properties provide candidate explanations for how regeneration integrates pre-existing tissues and how regenerative abilities could be lost in evolution or development without eliminating long-term tissue maintenance and repair.One Sentence SummaryHomeostatic tissue maintenance can occur independent of precise positional information in planarians.

scholarly journals Precise control of plant stem cell activity through parallel regulatory inputs

Development ◽  
2014 ◽  
Vol 141 (21) ◽  
pp. 4055-4064 ◽  
Author(s):  
T. Bennett ◽  
A. van den Toorn ◽  
V. Willemsen ◽  
B. Scheres
Keyword(s):  
Stem Cell ◽  
Cell Activity ◽  
Precise Control ◽  
Stem Cell Activity ◽  
Plant Stem

scholarly journals Hair-follicle mesenchymal stem-cell activity during homeostasis and wound healing

2021 ◽  
Author(s):  
Emil Aamar ◽  
Efrat Avigad Laron ◽  
Wisal Asaad ◽  
Sarina Harshuk-Shabso ◽  
David Enshell-Seijffers
Keyword(s):  
Wound Healing ◽  
Stem Cell ◽  
Mesenchymal Stem Cell ◽  
Hair Follicle ◽  
Cell Activity ◽  
Stem Cell Activity

scholarly journals 814 – Helicobacter Pylori Induces Aberrant Lrig1 Stem Cell Activity Within the Stomach in a Cag Type Iv Secretion System-Dependent Manner

2019 ◽  
Vol 156 (6) ◽  
pp. S-171-S-172 ◽  
Author(s):  
Lydia Wroblewski ◽  
Eunyoung Choi ◽  
Christine Petersen ◽  
Alberto Delgado ◽  
M. Blanca Piazuelo ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Stem Cell ◽  
Cell Activity ◽  
Secretion System ◽  
Type Iv Secretion ◽  
Type Iv Secretion System ◽  
Dependent Manner ◽  
Type Iv ◽  
Stem Cell Activity

Clinical-Scale Cultures of Cord Blood CD34+Cells to Amplify Committed Progenitors and Maintain Stem Cell Activity

2011 ◽  
Vol 20 (9) ◽  
pp. 1453-1464 ◽  
Author(s):  
Zoran Ivanovic ◽  
Pascale Duchez ◽  
Jean Chevaleyre ◽  
Marija Vlaski ◽  
Xavier Lafarge ◽  
...  
Keyword(s):  
Stem Cell ◽  
Cord Blood ◽  
Cell Activity ◽  
Clinical Scale ◽  
Cd34 Cells ◽  
Stem Cell Activity ◽  
Cord Blood Cd34
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