1
|
Dludla PV, Nkambule BB, Mazibuko-Mbeje SE, Nyambuya TM, Silvestri S, Orlando P, Mxinwa V, Louw J, Tiano L. The impact of dimethyl sulfoxide on oxidative stress and cytotoxicity in various experimental models. Toxicology 2021. [DOI: 10.1016/b978-0-12-819092-0.00025-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
2
|
Huang HB, Xiao K, Lu S, Yang KL, Ansari AR, Khaliq H, Song H, Zhong J, Liu HZ, Peng KM. Increased Thymic Cell Turnover under Boron Stress May Bypass TLR3/4 Pathway in African Ostrich. PLoS One 2015; 10:e0129596. [PMID: 26053067 PMCID: PMC4460079 DOI: 10.1371/journal.pone.0129596] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 05/10/2015] [Indexed: 12/27/2022] Open
Abstract
Previous studies revealed that thymus is a targeted immune organ in malnutrition, and high-boron stress is harmful for immune organs. African ostrich is the living fossil of ancient birds and the food animals in modern life. There is no report about the effect of boron intake on thymus of ostrich. The purpose of present study was to evaluate the effect of excessive boron stress on ostrich thymus and the potential role of TLR3/4 signals in this process. Histological analysis demonstrated that long-term boron stress (640 mg/L for 90 days) did not disrupt ostrich thymic structure during postnatal development. However, the numbers of apoptotic cells showed an increased tendency, and the expression of autophagy and proliferation markers increased significantly in ostrich thymus after boron treatment. Next, we examined the expression of TLR3 and TLR4 with their downstream molecular in thymus under boron stress. Since ostrich genome was not available when we started the research, we first cloned ostrich TLR3 TLR4 cDNA from thymus. Ostrich TLR4 was close to white-throated Tinamou. Whole avian TLR4 codons were under purify selection during evolution, whereas 80 codons were under positive selection. TLR3 and TLR4 were expressed in ostrich thymus and bursa of fabricius as was revealed by quantitative real-time PCR (qRT-PCR). TLR4 expression increased with age but significantly decreased after boron treatment, whereas TLR3 expression showed the similar tendency. Their downstream molecular factors (IRF1, JNK, ERK, p38, IL-6 and IFN) did not change significantly in thymus, except that p100 was significantly increased under boron stress when analyzed by qRT-PCR or western blot. Taken together, these results suggest that ostrich thymus developed resistance against long-term excessive boron stress, possibly by accelerating intrathymic cell death and proliferation, which may bypass the TLR3/4 pathway. In addition, attenuated TLRs activity may explain the reduced inflammatory response to pathogens under boron stress.
Collapse
Affiliation(s)
- Hai-bo Huang
- Department of Anatomy, Histology and Embryology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, People’s Republic of China
| | - Ke Xiao
- Department of Anatomy, Histology and Embryology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, People’s Republic of China
| | - Shun Lu
- Department of Anatomy, Histology and Embryology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, People’s Republic of China
| | - Ke-li Yang
- Department of Anatomy, Histology and Embryology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, People’s Republic of China
| | - Abdur Rahman Ansari
- Department of Anatomy, Histology and Embryology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, People’s Republic of China
| | - Haseeb Khaliq
- Department of Anatomy, Histology and Embryology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, People’s Republic of China
| | - Hui Song
- Department of Anatomy, Histology and Embryology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, People’s Republic of China
| | - Juming Zhong
- Department of Anatomy, Histology and Embryology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, People’s Republic of China
- Department of Anatomy, Physiology and Pharmacology, College of Veterinary Medicine, Auburn University, Auburn, Alabama, United States of America
| | - Hua-zhen Liu
- Department of Anatomy, Histology and Embryology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, People’s Republic of China
| | - Ke-mei Peng
- Department of Anatomy, Histology and Embryology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, People’s Republic of China
- * E-mail:
| |
Collapse
|
3
|
Bresgen N, Ohlenschläger I, Wacht N, Afazel S, Ladurner G, Eckl PM. Ferritin and FasL (CD95L) mediate density dependent apoptosis in primary rat hepatocytes. J Cell Physiol 2008; 217:800-8. [PMID: 18726999 DOI: 10.1002/jcp.21555] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Based on a recent description of an apoptosis stimulating property for hepatocyte derived isoferritins, this investigation demonstrates that ferritin, released in vitro from hepatocytes substantially contributes to density dependent apoptosis in primary hepatocytes and is significantly (P < or = 0.05) inhibited by anti-H-ferritin antibody rH02. Furthermore, total protein release and albumin secretion rapidly decline in a time and density dependent mode under serum-free conditions, whereas ferritin secretion, which is upregulated at initial stages of primary culture is not affected by cell density. Supplementation with dexamethasone (DEX) or proliferative stimulation by epidermal growth factor (EGF) and insulin strongly suppresses density dependent apoptosis. Both regimens have previously been shown to inhibit isoferritin mediated apoptosis in hepatocytes, most likely by interrupting proapotitc mitochondrial signalling. Finally, FasL/Fas also participates in density dependent apoptosis, since apoptosis is significantly (P < or = 0.005) reduced in high density cultures supplemented with an anti-FasL antibody. This antibody has also been shown to neutralise ferritin mediated apoptosis in primary hepatocytes, suggesting a linkage of ferritin and Fas in density dependent apoptosis. In conclusion, ferritin contributes to apoptosis in primary hepatocytes in an autocrine, density dependent mode, involving Fas stimulation and proapoptotic mitochondrial signalling. With respect to liver physiology, these findings may indicate that ferritin plays a yet unrecognised role as an acute phase signalling molecule in early stages of tissue repair and liver regeneration, and may also be responsible for the limited ability to propagate human hepatocytes in culture and the limited expansion of donor cells in the recipient liver upon cell transplantation.
Collapse
Affiliation(s)
- N Bresgen
- Department of Cell Biology, University of Salzburg, Salzburg, Austria.
| | | | | | | | | | | |
Collapse
|
4
|
Wu J, Kou W, Gao MT, Zhou YN, Wang AQ, Xue QJ, Qiao L. Effects of {2-[(3-carboxy-1-oxoprogy1)amino]-2-deoxy-D-glucose} on human hepatocellular carcinoma cell line. Acta Pharmacol Sin 2005; 26:635-40. [PMID: 15842786 DOI: 10.1111/j.1745-7254.2005.00066.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
AIM To study the effects of {2-[(3-carboxy-1-oxoprogy1)amino]-2-deoxy-D-glucose (COPADG) on cultured human hepatocellular carcinoma cells (HepG2). METHODS HepG2 cells were cultured in RPMI-1640 medium. Cell proliferation was determined by MTT assay. Apoptosis was determined by fluorescence microscopy, transmission electron microscopy, agarose gel electrophoresis of DNA fragmentation, and flow cytometry. RESULTS At the concentration ranging between 1-30 micromol/L, COPADG potently inhibited the growth and induced apoptosis of HepG2 cells. CONCLUSION COPADG could effectively induce apoptosis in human hepatocellular carcinoma cells. More investigations are warranted for the potential use of this compound as a new agent for the non-surgical management of human hepatocellular carcinoma.
Collapse
Affiliation(s)
- Jing Wu
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
| | | | | | | | | | | | | |
Collapse
|