scholarly journals Effect of ionizing radiation on human skeletal muscle precursor cells

2013 ◽  
Vol 47 (4) ◽  
pp. 376-381 ◽  
Author(s):  
Mihaela Jurdana ◽  
Maja Cemazar ◽  
Katarina Pegan ◽  
Tomaz Mars
Keyword(s):  
Skeletal Muscle ◽  
Stress Response ◽  
Ionizing Radiation ◽  
Human Skeletal Muscle ◽  
Long Term Effects ◽  
Post Irradiation ◽  
Acute Response ◽  
Proliferation Capacity ◽  
Myoblast Proliferation

Abstract Background. Long term effects of different doses of ionizing radiation on human skeletal muscle myoblast proliferation, cytokine signalling and stress response capacity were studied in primary cell cultures. Materials and methods. Human skeletal muscle myoblasts obtained from muscle biopsies were cultured and irradiated with a Darpac 2000 X-ray unit at doses of 4, 6 and 8 Gy. Acute effects of radiation were studied by interleukin - 6 (IL-6) release and stress response detected by the heat shock protein (HSP) level, while long term effects were followed by proliferation capacity and cell death. Results. Compared with non-irradiated control and cells treated with inhibitor of cell proliferation Ara C, myoblast proliferation decreased 72 h post-irradiation, this effect was more pronounced with increasing doses. Post-irradiation myoblast survival determined by measurement of released LDH enzyme activity revealed increased activity after exposure to irradiation. The acute response of myoblasts to lower doses of irradiation (4 and 6 Gy) was decreased secretion of constitutive IL-6. Higher doses of irradiation triggered a stress response in myoblasts, determined by increased levels of stress markers (HSPs 27 and 70). Conclusions. Our results show that myoblasts are sensitive to irradiation in terms of their proliferation capacity and capacity to secret IL-6. Since myoblast proliferation and differentiation are a key stage in muscle regeneration, this effect of irradiation needs to be taken in account, particularly in certain clinical conditions.

Long-term effects of spinal cord transection on fast and slow rat skeletal muscle

1986 ◽  
Vol 91 (3) ◽  
pp. 423-434 ◽  
Author(s):  
Richard L. Lieber ◽  
Carina B. Johansson ◽  
H.L. Vahlsing ◽  
Alan R. Hargens ◽  
Earl R. Feringa
Keyword(s):  
Skeletal Muscle ◽  
Spinal Cord ◽  
Spinal Cord Transection ◽  
Long Term Effects ◽  
Rat Skeletal Muscle

scholarly journals Long-Term Calorie Restriction Enhances Cellular Quality-Control Processes in Human Skeletal Muscle

Cell Reports ◽  
2016 ◽  
Vol 14 (3) ◽  
pp. 422-428 ◽  
Author(s):  
Ling Yang ◽  
Danilo Licastro ◽  
Edda Cava ◽  
Nicola Veronese ◽  
Francesco Spelta ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Quality Control ◽  
Calorie Restriction ◽  
Human Skeletal Muscle ◽  
Control Processes

Cell and Tissue Damage after Skin Exposure to Ionizing Radiation: Short- and Long-Term Effects after a Single and Fractional Doses

2014 ◽  
Vol 200 (3-4) ◽  
pp. 240-252 ◽  
Author(s):  
Kahori Kinoshita ◽  
Hisako Ishimine ◽  
Kenshiro Shiraishi ◽  
Harunosuke Kato ◽  
Kentaro Doi ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Tissue Damage ◽  
Long Term Effects ◽  
Skin Exposure ◽  
Short And Long Term

scholarly journals Effects of nutritional status and acute variation in substrate supply on cardiac and skeletal-muscle fructose 2,6-bisphosphate concentrations

1988 ◽  
Vol 250 (3) ◽  
pp. 773-779 ◽  
Author(s):  
T J French ◽  
M J Holness ◽  
P A MacLennan ◽  
M C Sugden
Keyword(s):  
Skeletal Muscle ◽  
Fatty Acid ◽  
Nutritional Status ◽  
Corn Oil ◽  
Acute Administration ◽  
Acute Effects ◽  
Long Term Effects ◽  
Substrate Supply ◽  
Lipid Substrate

We examined the long-term effects of nutritional status and the acute effects of changes in exogenous carbohydrate- and lipid-substrate supply and utilization on fructose 2,6-bisphosphate (Fru-2,6-P2) concentrations in heart, gastrocnemius and soleus. Starvation decreased Fru-2,6-P2 concentrations in all three muscles. The acute administration of insulin and glucose increased skeletal-muscle Fru-2,6-P2 in the fed, but not in the starved, state, but cardiac Fru-2,6-P2 was unchanged. Cardiac and skeletal-muscle Fru-2,6-P2 concentrations were unaffected by acute increases in fatty acid supply produced by the administration of corn oil plus heparin, or by acute decreases in fatty acid supply produced by inhibition of lipolysis. Differences in cardiac and skeletal-muscle Fru-2,6-P2 concentrations observed in response to starvation were not reversed by administration of glucose or glucose plus insulin, or by inhibition of lipolysis, even though changes in citrate (heart), acylcarnitine (heart) and glycogen (skeletal muscle) were observed. Concentrations remained low for at least 8 h after chow re-feeding, but the fed value was restored by 24 h.

Chemical Protection against the Long-Term Effects of a Single Whole-Body Exposure of Mice to Ionizing Radiation: II. Causes of Death

1978 ◽  
Vol 74 (3) ◽  
pp. 415 ◽  
Author(s):  
J. R. Maisin ◽  
A. Declève ◽  
G. B. Gerber ◽  
G. Mattelin ◽  
M. Lambiet-Collier ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Causes Of Death ◽  
Whole Body ◽  
Long Term Effects ◽  
Chemical Protection

Long-term effects of ionizing radiation after the Chernobyl accident: Possible contribution of historic dose

2018 ◽  
Vol 165 ◽  
pp. 55-62 ◽  
Author(s):  
Laila Omar-Nazir ◽  
Xiaopei Shi ◽  
Anders Moller ◽  
Timothy Mousseau ◽  
Soohyun Byun ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Chernobyl Accident ◽  
Long Term Effects

scholarly journals Timing matters: Long term effects of adversities from prenatal period up to adolescence on adolescents’ cortisol stress response. The TRAILS study

2012 ◽  
Vol 37 (9) ◽  
pp. 1439-1447 ◽  
Author(s):  
Nienke M. Bosch ◽  
Harriëtte Riese ◽  
Sijmen A. Reijneveld ◽  
Martin P. Bakker ◽  
Frank C. Verhulst ◽  
...  
Keyword(s):  
Stress Response ◽  
Prenatal Period ◽  
Long Term Effects

scholarly journals Cardiovascular Effects of Long-Term Central and Peripheral Administration of Urocortin, Corticotropin-Releasing Factor, and Adrenocorticotropin in Sheep

Endocrinology ◽  
2004 ◽  
Vol 145 (12) ◽  
pp. 5598-5604 ◽  
Author(s):  
R. S. Weisinger ◽  
J. R. Blair-West ◽  
P. Burns ◽  
D. A. Denton ◽  
B. Purcell ◽  
...  
Keyword(s):  
Stress Response ◽  
Arterial Pressure ◽  
Cardiovascular Effects ◽  
Corticotropin Releasing Factor ◽  
Central Administration ◽  
Long Term Effects ◽  
Cardiovascular Actions ◽  
Term Administration

Abstract The neuroendocrine hormones ACTH and corticotropin- releasing factor (CRF), which are involved in the stress response, have acute effects on arterial pressure. New evidence indicates that urocortin (UCN), the putative agonist for the CRF type 2 receptor, has selective cardiovascular actions. The responses to long-term infusions of these hormones, both peripherally and centrally, in conscious animals have not been studied. Knowledge of the long-term effects is important because they may differ considerably from their acute actions, and stress is frequently a chronic stimulus. The present experiments investigated the cardiovascular effects of CRF, UCN, and ACTH in conscious sheep. Infusions were made either into the lateral cerebral ventricles (icv) or iv over 4 d at 5 μg/h. UCN infused icv or iv caused a prolonged increase in heart rate (HR) (P < 0.01) and a small increase in mean arterial pressure (MAP) (P < 0.05). CRF infused icv or iv progressively increased MAP (P < 0.05) but had no effect on HR. Central administration of ACTH had no effect, whereas systemic infusion increased MAP and HR (P < 0.001). In conclusion, long-term administration of these three peptides associated with the stress response had prolonged, selective cardiovascular actions. The striking finding was the large and sustained increase in HR with icv and iv infusions of UCN. These responses are probably mediated by CRF type 2 receptors because they were not reproduced by infusions of CRF.

Sign in / Sign up

Export Citation Format

Share Document