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Stevens WG, Perez JL, Pham LD, Jimenez Lozano JN. Expression of HSP70 in Human Skin After Cryolipolysis Treatment. Aesthet Surg J 2023; 43:NP910-NP915. [PMID: 37279585 PMCID: PMC10575600 DOI: 10.1093/asj/sjad178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 05/30/2023] [Accepted: 06/01/2023] [Indexed: 06/08/2023] Open
Abstract
BACKGROUND Cryolipolysis nonsurgically targets and reduces subcutaneous fat through controlled cooling of skin and underlying fatty tissue. Although skin changes after cryolipolysis treatment have been observed clinically, the mechanisms by which these occur are not well understood. OBJECTIVES The aim of this study was to investigate the expression of heat shock protein 70 (HSP70) in the epidermal and dermal layers of human skin following cryolipolysis treatment. METHODS Subjects (N = 11; average age, 41.8 years; average BMI, 29.59 kg/m2) were recruited to receive cryolipolysis treatment with a vacuum cooling cup applicator (-11°C/35 minutes) prior to abdominoplasty surgery. Treated and untreated abdominal tissue samples were harvested immediately after surgery (average follow-up, 15 days; range, 3 days to 5 weeks). Immunohistochemistry for HSP70 was performed on all samples. Slides were digitized and quantified in epidermal and dermal layers. RESULTS There was higher epidermal and dermal HSP70 expression in cryolipolysis-treated pre-abdominoplasty samples vs untreated samples. There was a 1.32-fold increase of HSP70 expression in the epidermis (P < .05) and a 1.92-fold increase in the dermis (P < .04) compared with untreated samples. CONCLUSIONS We found significant induction of HSP70 after cryolipolysis treatment in epidermal and dermal layers. HSP70 has potential therapeutic benefits and is recognized to have a role in skin protection and adaption after thermal stress. Although cryolipolysis is popular for subcutaneous fat reduction, cryolipolytic HSP induction in the skin may prove valuable for additional therapeutic applications, including skin wound healing, remodeling, rejuvenation, and photoprotection. LEVEL OF EVIDENCE: 4
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Affiliation(s)
- W Grant Stevens
- Corresponding Author: Dr W. Grant Stevens, University of Southern California, 704 Manhattan Beach Blvd, Manhattan Beach, CA 90266, USA. E-mail:
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Zhang X, Wang D, Liu J. Hypoxia-inducible factor-1α is involved in the response to heat stress in lactating dairy cows. J Therm Biol 2023; 112:103460. [PMID: 36796905 DOI: 10.1016/j.jtherbio.2023.103460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 01/04/2023] [Accepted: 01/05/2023] [Indexed: 01/09/2023]
Abstract
Hypoxia-inducible factor-1α (HIF-1α) is important in maintaining cellular oxygen homeostasis and cellular heat tolerance. To explore the role of HIF-1α in the response to heat stress (HS) in dairy cows, 16 Chinese Holstein cows (milk yield: 32 ± 4 kg/d, days in milk: 272 ± 7 d, parity: 2-3) were used to collect coccygeal vein blood and milk samples when cows were under mild (temperature-humidity index = 77) and moderate HS (temperature-humidity index = 84), respectively. Compared to cows under mild HS, the respiratory rate (P < 0.01), rectal temperature (P < 0.01), and blood concentrations of heat shock protein (HSP)70 (P < 0.01) and HSP27 (P < 0.01) were higher, but oxygen saturation (P = 0.02) and hemoglobin (P < 0.01) were lower in cows under moderate HS. Blood HIF-1α concentration was greater (P < 0.01) during moderate HS, indicating that HIF-1α is involved in lactating cows' response to HS. To confirm these findings, we collected coccygeal vein blood and milk samples from 59 dairy cows under moderate HS. The HIF-1α levels were correlated with the levels of heat shock transcription factor (HSF) (r = 0.7857, P < 0.01), HSP70 (r = 0.4543, P < 0.01) and HSP27 (r = 0.8782, P < 0.01). A comparison of 15 cows with higher HIF-1α (>482 ng/L) and 15 cows with lower HIF-1α levels (<439 ng/L) showed that reactive oxidative species were higher (P = 0.02), but superoxide dismutase (P < 0.01), total antioxidation capacity (P = 0.02) and glutathione peroxidase (P < 0.01) were lower in higher HIF-1α cows. These results suggested that HIF-1α may be indicative of the risk of oxidative stress in heat-stressed cows and may participate in the response of cows to HS by synergistically activating the expression of the HSP family with HSF.
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Affiliation(s)
- Xu Zhang
- Institute of Dairy Science, College of Animal Sciences, China; Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, 310058, Hangzhou, China
| | - Diming Wang
- Institute of Dairy Science, College of Animal Sciences, China; Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, 310058, Hangzhou, China
| | - Jianxin Liu
- Institute of Dairy Science, College of Animal Sciences, China; Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, 310058, Hangzhou, China.
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Feng Y, Fan X, Suo D, Zhang S, Ma Y, Wang H, Guan X, Yang H, Wang C. Screening of heat stress-regulating active fractions in mung beans. Front Nutr 2022; 9:1102752. [PMID: 36890864 PMCID: PMC9986443 DOI: 10.3389/fnut.2022.1102752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Accepted: 12/19/2022] [Indexed: 02/22/2023] Open
Abstract
Introduction Heat stress caused by high temperatures has important adverse effects on the safety and health status of humans and animals, and dietary interventions to alleviate heat stress in daily life are highly feasible. Methods In this study, the components of mung bean that have heat stress-regulating effects were characterized by in vitro antioxidant indicators and heat stress cell models. Results As a result, 15 target monomeric polyphenol fractions were identified based on untargeted analysis on an ultra performance liquid chromatography coupled with high field quadrupole orbit high resolution mass spectrometry (UHPLC-QE-HF-HRMS) platform and available reports. The results of DPPH and ABTS radical scavenging showed that mung bean polyphenols (crude extract) and 15 monomeric polyphenols had better antioxidant activity, followed by oil and mung bean peptides, while protein and polysaccharides had relatively poor antioxidant activity. Qualitative and quantitative assays for 20 polyphenols (15 polyphenols and 5 isomers) were then established based on platform targets. Vitexin, orientin, and caffeic acid were identified as monomeric polyphenols for heat stress control in mung beans based on their content. Finally, mild (39°C), moderate (41°C), and severe (43°C) heat stress models were successfully constructed based on mouse intestinal epithelial Mode-k cells and human colorectal adenocarcinoma Caco-2 cell lines, all with an optimal heat stress modeling time of 6 h. Screening of mung bean fractions using HSP70 mRNA content, a key indicator of heat stress. As a result, HSP70 mRNA content was significantly up-regulated by different levels of heat stress in both cell models. The addition of mung bean polyphenols (crude extract), vitexin, orientin, and caffeic acid resulted in significant down-regulation of HSP70 mRNA content, and the higher the level of heat stress, the more significant the regulation effect, with orientin having the best effect. Mung bean proteins, peptides, polysaccharides, oils and mung bean soup resulted in increased or no change in HSP70 mRNA levels after most heat stresses. Discussion The polyphenols were shown to be the main heat stress regulating components in mung bean. The results of the validation experiments confirm that the above three monomeric polyphenols may be the main heat stress regulating substances in mung bean. The role of polyphenols in the regulation of heat stress is closely linked to their antioxidant properties.
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Affiliation(s)
- Yuchao Feng
- College of Food, Heilongjiang Bayi Agricultural University, Daqing, China.,Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, China.,Chinese National Engineering Research Center, Daqing, China
| | - Xia Fan
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Dengcheng Suo
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shu Zhang
- College of Food, Heilongjiang Bayi Agricultural University, Daqing, China.,Chinese National Engineering Research Center, Daqing, China
| | - Yantao Ma
- College of Food, Heilongjiang Bayi Agricultural University, Daqing, China.,Chinese National Engineering Research Center, Daqing, China
| | - Haoyu Wang
- College of Food, Heilongjiang Bayi Agricultural University, Daqing, China.,Chinese National Engineering Research Center, Daqing, China
| | - Xin Guan
- College of Food, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Hongzhi Yang
- College of Food, Heilongjiang Bayi Agricultural University, Daqing, China.,Chinese National Engineering Research Center, Daqing, China
| | - Changyuan Wang
- College of Food, Heilongjiang Bayi Agricultural University, Daqing, China.,Chinese National Engineering Research Center, Daqing, China
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Inhibition of HSF1 and SAFB Granule Formation Enhances Apoptosis Induced by Heat Stress. Int J Mol Sci 2021; 22:ijms22094982. [PMID: 34067147 PMCID: PMC8124827 DOI: 10.3390/ijms22094982] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/13/2021] [Accepted: 05/05/2021] [Indexed: 12/12/2022] Open
Abstract
Stress resistance mechanisms include upregulation of heat shock proteins (HSPs) and formation of granules. Stress-induced granules are classified into stress granules and nuclear stress bodies (nSBs). The present study examined the involvement of nSB formation in thermal resistance. We used chemical compounds that inhibit heat shock transcription factor 1 (HSF1) and scaffold attachment factor B (SAFB) granule formation and determined their effect on granule formation and HSP expression in HeLa cells. We found that formation of HSF1 and SAFB granules was inhibited by 2,5-hexanediol. We also found that suppression of HSF1 and SAFB granule formation enhanced heat stress-induced apoptosis. In addition, the upregulation of HSP27 and HSP70 during heat stress recovery was suppressed by 2,5-hexanediol. Our results suggested that the formation of HSF1 and SAFB granules was likely to be involved in the upregulation of HSP27 and HSP70 during heat stress recovery. Thus, the formation of HSF1 and SAFB granules was involved in thermal resistance.
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Nava R, Zuhl MN. Heat acclimation-induced intracellular HSP70 in humans: a meta-analysis. Cell Stress Chaperones 2020; 25:35-45. [PMID: 31823288 PMCID: PMC6985308 DOI: 10.1007/s12192-019-01059-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 11/25/2019] [Accepted: 11/28/2019] [Indexed: 02/08/2023] Open
Abstract
Heat acclimation (HA) in humans promotes thermoregulatory adaptations that support management of core temperature in hot environments and reduces the likelihood of heat related illness. Another adaptation to HA is thermotolerance through induction of the heat shock protein (HSP) stress system, which provides protection against thermal insult. However, whether or not HA leads to upregulation of the intracellular HSP system, namely intracellular HSP70 (HSP70), is unclear in humans. Therefore, the purposes of this meta-analysis were to determine if HA leads to HSP70 induction among humans and to evaluate how methodological differences among HA studies influence findings regarding HA-induced HSP70 accumulation. Several databases were searched to identify studies that measured HSP70 (protein and mRNA) changes in response to HA among humans. The effect of HA on HSP70 was analyzed. Differences in the effect of HA were assessed between protein and mRNA. The moderating effect of several independent variables (HA frequency, HA duration, core temperature, exercise intensity) on HSP70 was also evaluated. Data were extracted from 12 studies including 118 participants (mean age 24 years, 98% male). There was a significant effect of HA on HSP70 expression, g = 0.97 (95% CI, 0.08-1.89). The effect of HA was different between subgroups (protein vs. mRNA), g = 1.51 (95% CI, 0.71-2.31), and g = - 0.39 (95% CI, - 1.36), respectively. The frequency of HA (in days) moderated HSP70 protein expression. There was a significant effect of heat acclimation on HSP70 induction in humans. The only factor among identified studies that may moderate this response was the frequency (number of days) of heat exposure.
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Affiliation(s)
- Roberto Nava
- Department of Health, Exercise, and Sports Sciences, University of New Mexico, Albuquerque, NM, 87131, USA.
| | - Micah N Zuhl
- Department of Health, Exercise, and Sports Sciences, University of New Mexico, Albuquerque, NM, 87131, USA
- School of Health Sciences, Central Michigan University, Mount Pleasant, MI, 48859, USA
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Song HB. Possible involvement of HSP70 in pancreatic cancer cell proliferation after heat exposure and impact on RFA postoperative patient prognosis. Biochem Biophys Rep 2019; 20:100700. [PMID: 31867446 PMCID: PMC6895569 DOI: 10.1016/j.bbrep.2019.100700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 10/19/2019] [Accepted: 10/21/2019] [Indexed: 11/26/2022] Open
Abstract
Purpose As an alleviative treatment measured in patients with unresectable advanced pancreatic cancer, radiofrequency ablation (RFA) needed more clinical data to prove its advantages and to explore limitations in its utilization. This study was determined to observe the efficacy of RFA, and to explore its impact on perioperative periphery carcinoma as well as the normal pancreatic tissues. Methods Clinical data of 32 patients with pancreatic cancer accepted RFA surgery were collected. Followed up patients' pain degree and the changes in serum tumor markers CA19-9 and CA 242 before and after surgery. Ex vivo, gave human pancreatic cancer cell line PANC-1 heat treatment to simulate the heat exposure condition periphery carcinoma was experienced during RFA surgery, and to observe the proliferation rate and HSP70 expression change compared with control group. Results Of the 32 patients, 1 died of upper gastrointestinal hemorrhage, and 29 survived for more than 5 months, 2 of which for more than 16 months. The average CA19-9 and CA 242 levels of the patients were significantly decreased in 3 months after surgery (t = 9.873, 5.978, P < 0.001). During in vitro experiments, the proliferation rate of PANC-1 cells after heating was significantly increased, accompanied with the increased HSP70 expression. The addition of HSP70 inhibitor can inhibit the rise of proliferation after heat therapy. Conclusion Utilizing RFA treat patients with unresectable advanced pancreatic cancer, could effectively relieve the pain, decline jaundice, and deduce tumor marker levels significantly. However, it failed to extend the long-term survival rate of the patients significantly. This study found that a higher proliferative rate accompanied with a higher HSP70 expression level were observed on in vitro cultured pancreatic carcinoma cells after heat treatment, which could be altered by HSP70 inhibitor. And these findings indicated that the heat exposure might impact periphery carcinoma during RFA surgery and HSP70 might play an important role in patients' prognosis.
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Affiliation(s)
- Hui-Bin Song
- The Third Affiliated Hospital of Qiqihar Medical College, 27 Taishun Street, Tiefeng District, Qiqihar, Heilongjiang province, China
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Hartanto S, Ko HS, Jee SH, Kang JU, Seo JS, Kang YH, Kim HN, Ohh SJ. Effect of dietary nutmeg oil on heat-stress tolerance-related parameters in Korean native chicken reared under hot temperature. J Anim Physiol Anim Nutr (Berl) 2019; 103:1160-1167. [PMID: 31050054 DOI: 10.1111/jpn.13113] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Revised: 04/08/2019] [Accepted: 04/12/2019] [Indexed: 12/31/2022]
Abstract
This study investigated the effect of dietary nutmeg oil (NO) on growth performance, blood parameters, lipid peroxidation and heat shock protein (HSP) 70 expression in Korean native chicken (KNC) reared under hot temperature. We allocated 273 meat-type KNCs (Hanhyup-3, 4-week-old, body weight [BW] = 539.93 ± 1.75 g) to the following three treatments with seven replicate pens (13 birds/pen) per treatment. Three treatment diets were as follows: (a) Control, basal diet without NO supplementation; (b) NO 250; and (c) NO 500, basal diet supplemented with 250 and 500 ppm NO respectively. Diets and water were provided ad libitum throughout the 6-week feeding trial. During overall period (0-6 weeks), no differences (p > 0.05) were observed in BW gain (BWG), feed intake (FI) and feed conversion rate (FCR) among treatments. However, the FI at 0-3 weeks decreased (p < 0.05) quadratically with increasing NO levels. Most blood parameters did not differ (p > 0.05) among treatments, although the monocyte level of the NO 500 group was considerably lower (p > 0.05) than that of the other groups. Furthermore, dietary NO did not affect serum triglyceride, cholesterol, total protein, albumin, calcium, phosphorus and alanine aminotransferase (ALT) levels (p > 0.05); however, it linearly decreased serum aspartate aminotransferase (AST) level (p < 0.05). Additionally, serum malondialdehyde (MDA) concentration decreased (p < 0.05) and heart MDA concentration was lower (p = 0.08) with increasing dietary NO supplementation. After a 3-hr heat (35°C) challenge, the rectal temperature (RT) reduced (p < 0.05) linearly with increasing NO levels. Dietary NO did not affect liver HSP70 (p > 0.05) gene expression. In conclusion, NO potentially enhanced the ability of chickens to alleviate heat stress. Furthermore, our findings suggest that lipid oxidation inhibition by dietary NO likely mediated the enhanced heat-stress tolerance of the chickens.
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Affiliation(s)
- Slamet Hartanto
- College of Animal Life Science, Kangwon National University, Chuncheon, Korea.,Indonesian Agency for Agricultural Research and Development, Ministry of Agriculture, North Maluku, Indonesia
| | - Han Seo Ko
- College of Animal Life Science, Kangwon National University, Chuncheon, Korea
| | - Seung Hwan Jee
- College of Animal Life Science, Kangwon National University, Chuncheon, Korea
| | - Ji Ung Kang
- College of Animal Life Science, Kangwon National University, Chuncheon, Korea
| | - Jee Soo Seo
- College of Animal Life Science, Kangwon National University, Chuncheon, Korea
| | - Yu Hyun Kang
- College of Animal Life Science, Kangwon National University, Chuncheon, Korea
| | - Hee Na Kim
- College of Animal Life Science, Kangwon National University, Chuncheon, Korea
| | - Sang Jip Ohh
- College of Animal Life Science, Kangwon National University, Chuncheon, Korea
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de Barros FRO, Paula-Lopes FF. Cellular and epigenetic changes induced by heat stress in bovine preimplantation embryos. Mol Reprod Dev 2018; 85:810-820. [DOI: 10.1002/mrd.23040] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Accepted: 06/26/2018] [Indexed: 01/15/2023]
Affiliation(s)
- Flavia R. O. de Barros
- Department of Biological Sciences; Federal University of São Paulo; São Paulo Brazil
- School of Bioprocess Engineering and Biotechnology, Federal University of Technology; Parana Brazil
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Hamada M, Ohkoshi K, Inagaki K, Ebihara N, Murakami A. Subthreshold Photocoagulation Using Endpoint Management in the PASCAL® System for Diffuse Diabetic Macular Edema. J Ophthalmol 2018; 2018:7465794. [PMID: 29651345 PMCID: PMC5831979 DOI: 10.1155/2018/7465794] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 12/11/2017] [Indexed: 01/02/2023] Open
Abstract
We evaluated subthreshold photocoagulation using endpoint management (EPM) for the treatment of diabetic macular edema (DME). The study enrolled 10 eyes from 10 patients (6 men and 4 women) with DME. The entry criteria included central macular thickness (CMT) ≥ 300 μm and decimal visual acuity (VA) ≤ 0.5. The primary endpoints were VA (logMAR) and CMT at 6 months follow-up. Secondary endpoints included fundus autofluorescence, macular volume (MV), and macular sensitivity (MS). We used the PASCAL Streamline Yellow® (wavelength, 577 nm) system to perform grid pattern laser photocoagulation at 50% of the threshold (size, 100 μm; duration, 0.015 s; spacing, 0.5; and energy, 4.5-7.8 mJ). At 6 months posttreatment, CMT was significantly decreased, while there were no significant changes in macular sensitivity, mean BCVA (logMAR), or macular volume. Autofluorescence imaging revealed no changes after treatment in 6 of 10 eyes. No eyes exhibited subjective symptoms of scotoma after photocoagulation. Optical coherence tomography showed the complete resolution of macular edema in 4 eyes (40%) after a single treatment; MS was increased in all 4 of these eyes at 6 months posttreatment. In conclusion, subthreshold photocoagulation using EPM is safe and effective for DME treatment and preserves MS. This trial is registered with UMIN000012401.
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Affiliation(s)
- Masafumi Hamada
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
- Department of Ophthalmology, St. Luke's International Hospital, 9-1 Akashi-cho, Chuo-ku, Tokyo 104-8560, Japan
| | - Kishiko Ohkoshi
- Department of Ophthalmology, St. Luke's International Hospital, 9-1 Akashi-cho, Chuo-ku, Tokyo 104-8560, Japan
| | - Keiji Inagaki
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
- Department of Ophthalmology, St. Luke's International Hospital, 9-1 Akashi-cho, Chuo-ku, Tokyo 104-8560, Japan
| | - Nobuyuki Ebihara
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
- Department of Ophthalmology, Juntendo University Urayasu Hospital, 1-1 Tomioka 2-chome, Urayasu-shi, Chiba 279-0021, Japan
| | - Akira Murakami
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
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Pomatto LCD, Tower J, Davies KJA. Sexual Dimorphism and Aging Differentially Regulate Adaptive Homeostasis. J Gerontol A Biol Sci Med Sci 2018; 73:141-149. [PMID: 28525535 PMCID: PMC5861879 DOI: 10.1093/gerona/glx083] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 04/26/2017] [Indexed: 11/13/2022] Open
Abstract
External and internal stimuli cause modifications to gene and biochemical pathways. In turn, demonstrating that biological systems continuously make short-term adaptations both to set-points, and to the range of "normal" capacity, due to mild conditional changes, or to subtoxic, nondamaging levels of chemical agents. This is termed as "Adaptive Homeostasis," defined with the following: "The transient expansion or contraction of the homeostatic range in response to exposure to sub-toxic, nondamaging, signaling molecules or events, or the removal or cessation of such molecules or events." Research from several laboratories, including our own, found that adaptive homeostasis declines with age in organisms as diverse as worms, flies, and mammals, and decreases with senescence in mammalian cell cultures. We suggest that diminishing adaptive homeostasis may play a causal role as a factor responsible for the aging phenotype. Furthermore, although studies of humans, animals, and model organisms are often limited to a single sex, and cell culture studies may even be conducted with lines whose donor's sex was unknown, studies reveal distinct sexual dimorphism in adaptive homeostasis. Interestingly, although young males and females may exhibit dramatic differences in adaptive capacities and/or preferences, these distinctions are lost with age as adaptive homeostasis patterns converge.
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Affiliation(s)
- Laura C D Pomatto
- Leonard Davis School of Gerontology of the Ethel Percy Andrus Gerontology Center
| | - John Tower
- Leonard Davis School of Gerontology of the Ethel Percy Andrus Gerontology Center
- Molecular and Computational Biology Program, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, California
| | - Kelvin J A Davies
- Leonard Davis School of Gerontology of the Ethel Percy Andrus Gerontology Center
- Molecular and Computational Biology Program, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, California
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Kim HS, Lee DY. Photothermal therapy with gold nanoparticles as an anticancer medication. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2016. [DOI: 10.1007/s40005-016-0292-6] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Thermosensitive/superparamagnetic iron oxide nanoparticle-loaded nanocapsule hydrogels for multiple cancer hyperthermia. Biomaterials 2016; 106:13-23. [PMID: 27543919 DOI: 10.1016/j.biomaterials.2016.08.015] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 08/10/2016] [Accepted: 08/10/2016] [Indexed: 12/29/2022]
Abstract
Magnetic hyperthermia therapy (MHT) has been explored as an efficient and non-invasive treatment for cancer. However, the short retention time of magnetic nanoparticles localized within tumor targets hinders its potential for repeatable treatment. We report herein on the development of an injectable, biodegradable, thermosensitive and superparamagnetic iron oxide nanoparticle-loaded nanocapsule hydrogels (SPION-NHs) system for multiple MHT and long-term magnetic resonance imaging (MRI) contrast. Transmission electron microscopic images showed the core-shell structure of self-assembled poly(organophosphazene) nanocapsules and multiple embedded SPIONs within the core. The SPION-loaded nanocapusule solution can be transformed into hydrogel form at body temperature via the hydrophobic interaction. The cancer cells were killed efficiently using multiple MHT at moderate temperature through necrosis, as compared to single MHT-induced apoptosis. More than three weeks retention of SPIONs within tumors after a single injection of SPION-NHs facilitated successful multiple MHT, which was monitored by T2-weighted MRI. Furthermore, excellent in vivo anti-cancer effect was observed after four cycles of MHT without severe damage on the surrounding healthy tissues, which was in contrast to single magnetic thermal ablation.
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Sayed KM, Mahmoud AA. Heat shock protein-70 and hypoxia inducible factor-1α in type 2 diabetes mellitus patients complicated with retinopathy. Acta Ophthalmol 2016; 94:e361-6. [PMID: 26725915 DOI: 10.1111/aos.12919] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 09/27/2015] [Indexed: 01/04/2023]
Abstract
PURPOSE To elucidate the role of heat shock protein-70 (HSP70) and hypoxia inducible factor-1α (HIF-1α) in diabetic retinopathy (DR) patients. DESIGN AND METHODS A comparative study was done on the serum level of both HSP70 and HIF-1α in 50 patients with type 2 diabetes mellitus (T2DM) without DR, 50 patients with T2DM and DR and 70 healthy control subjects. RESULTS HSP70 and HIF-1α were significantly increased in T2DM patients compared to controls and increased in patients with T2DM & DR compared to T2DM patients without DR (p < 0.0001). HSP70 did not differ among the patients with different stages of DR, while HIF-1α increased significantly in grades 3 and 4 DR patients compared to grades 1 and 2 DR patients. A strong correlation was found between HIF-1α and the development of DR (r = 0.835, p = 0.00) but not with HSP70. HIF-1α can be used as a predictor for development of DR but not HSP70. CONCLUSIONS Our study was the first that investigated both HSP70 and HIF-1α in humans and was the first that measured their levels in serum of patients with DR. The study suggested that HSP70 might have a protective function in T2DM patients rather than a therapeutic function. HIF-1α had an upper hand in the development and progression of DR. Induction of HSP70 and blockage of HIF-1α could lead to the development of novel prophylactic and therapeutic strategies for DR and potentially other diabetic complications.
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Affiliation(s)
- Khulood M. Sayed
- The Department of Ophthalmology; Faculty of Medicine; Sohag University; Sohag Egypt
| | - Aida A. Mahmoud
- The Department of Biochemistry; Faculty of Medicine; Sohag University; Sohag Egypt
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Sublethal Photothermal Stimulation with a Micropulse Laser Induces Heat Shock Protein Expression in ARPE-19 Cells. J Ophthalmol 2015; 2015:729792. [PMID: 26697211 PMCID: PMC4677213 DOI: 10.1155/2015/729792] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 11/09/2015] [Accepted: 11/15/2015] [Indexed: 01/04/2023] Open
Abstract
Purpose/Aim of the Study. Subthreshold micropulse diode laser photocoagulation is an effective treatment for macular edema. The molecular mechanisms underlying treatment success are poorly understood. Therefore, we investigated the effects of sublethal laser energy doses on a single layer of densely cultured ARPE-19 cells as a model of the human retinal pigment epithelium (RPE). Materials and Methods. A single layer of densely cultured human ARPE-19 cells was perpendicularly irradiated with a micropulse diode laser. Nonirradiated cells served as controls. Sublethal laser energy was applied to form a photocoagulation-like area in the cultured cell layers. Hsp70 expression was evaluated using quantitative polymerase chain reaction and immunocytochemistry. Results. Photocoagulation-like areas were successfully created in cultured ARPE-19 cell layers using sublethal laser energy with our laser irradiation system. Hsp70 mRNA expression in cell layers was induced within 30 min of laser irradiation, peaking at 3 h after irradiation. This increase was dependent on the number of laser pulses. Hsp70 upregulation was not observed in untreated cell layers. Immunostaining indicated that Hsp70 expression occurred concentrically around laser irradiation sites and persisted for 24 h following irradiation. Conclusion. Sublethal photothermal stimulation with a micropulse laser may facilitate Hsp70 expression in the RPE without inducing cellular damage.
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Philandrianos C, Bertrand B, Andrac-Meyer L, Magalon G, Casanova D, Kerfant N, Mordon S. Treatment of keloid scars with a 1210-nm diode laser in an animal model. Lasers Surg Med 2015; 47:798-806. [PMID: 26437851 DOI: 10.1002/lsm.22428] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/17/2015] [Indexed: 11/11/2022]
Abstract
BACKGROUND AND OBJECTIVE A temperature increase can improve wound healing by activation of heat shock protein 70 and stimulation of fibroblasts. Since keloids are a dysfunction of collagen fiber synthesis and organization, this study aimed to evaluate if a 1,210 nm diode laser could have effects in a new animal model of keloid scars. STUDY DESIGN/MATERIALS AND METHODS A total of 39 nude mice were used for this study. Phototypes IV and V human keloids were grafted into their backs and after 1 month of healing, the mice were divided into four groups: Control, Laser, Resection, Resection/Laser. In the Laser group, the keloids were treated with a 1,210-nm diode-laser with the following parameters: 4 W; 10 seconds; fluence: 51 J/cm(2) ; spot: 18.9 × 3.7 mm(2) . In the Resection group, surgical intra-lesional excision was performed. In the Resection/Laser group, keloids were treated with the 1,210-nm laser-diode after surgical intra-lesional excision. Temperature measurements were made during the laser treatment. Clinical examination and histological study were performed on the day of treatment and 1 month, 2 months, and 3 months later. RESULTS Mean temperature measurement was of 44.8°C (42-48°) in the Laser groups. No healing complications or keloid proliferation was observed in any group. Keloid histologic characters were confirmed in all grafts. No histologic particularity was observed in the laser groups in comparison with the Control and Resection groups. CONCLUSION First, this keloid animal model appears to be adapted for laser study. Secondly, the 1,210-nm diode laser does not induce keloid thermal damage in vivo. Further studies with different 1,210-nm laser diode parameters should be performed in order to observe significant effects on keloids.
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Affiliation(s)
| | - Baptiste Bertrand
- Department of Plastic Surgery, AP-HM, Marseille, 13915, France.,Aix-Marseille University, Marseille, France
| | - Lucile Andrac-Meyer
- Aix-Marseille University, Marseille, France.,Department of Pathology, AP-HM, Marseille, 13915, France
| | - Guy Magalon
- Department of Plastic Surgery, AP-HM, Marseille, 13915, France
| | - Dominique Casanova
- Department of Plastic Surgery, AP-HM, Marseille, 13915, France.,Aix-Marseille University, Marseille, France
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16
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Lee N, Yoo D, Ling D, Cho MH, Hyeon T, Cheon J. Iron Oxide Based Nanoparticles for Multimodal Imaging and Magnetoresponsive Therapy. Chem Rev 2015; 115:10637-89. [PMID: 26250431 DOI: 10.1021/acs.chemrev.5b00112] [Citation(s) in RCA: 588] [Impact Index Per Article: 65.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Nohyun Lee
- School of Advanced Materials Engineering, Kookmin University , Seoul 136-702, Korea
| | - Dongwon Yoo
- Department of Chemistry, Yonsei University , Seoul 120-749, Korea
| | - Daishun Ling
- Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Korea.,School of Chemical and Biological Engineering, Seoul National University , Seoul 151-742, Korea.,Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University , Hangzhou 310058, PR China
| | - Mi Hyeon Cho
- Department of Chemistry, Yonsei University , Seoul 120-749, Korea
| | - Taeghwan Hyeon
- Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Korea.,School of Chemical and Biological Engineering, Seoul National University , Seoul 151-742, Korea
| | - Jinwoo Cheon
- Department of Chemistry, Yonsei University , Seoul 120-749, Korea
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17
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Gibson OR, Mee JA, Taylor L, Tuttle JA, Watt PW, Maxwell NS. Isothermic and fixed-intensity heat acclimation methods elicit equal increases in Hsp72 mRNA. Scand J Med Sci Sports 2015; 25 Suppl 1:259-68. [DOI: 10.1111/sms.12430] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/19/2015] [Indexed: 11/30/2022]
Affiliation(s)
- O. R. Gibson
- Centre for Sport and Exercise Science and Medicine (SESAME); Welkin Human Performance Laboratories; University of Brighton; Eastbourne UK
| | - J. A. Mee
- Centre for Sport and Exercise Science and Medicine (SESAME); Welkin Human Performance Laboratories; University of Brighton; Eastbourne UK
| | - L. Taylor
- Muscle Cellular and Molecular Physiology (MCMP) and Applied Sport and Exercise Science (ASEP) Research Groups; Department of Sport Science and Physical Activity; Institute of Sport and Physical Activity Research (ISPAR); University of Bedfordshire; Brighton UK
| | - J. A. Tuttle
- Muscle Cellular and Molecular Physiology (MCMP) and Applied Sport and Exercise Science (ASEP) Research Groups; Department of Sport Science and Physical Activity; Institute of Sport and Physical Activity Research (ISPAR); University of Bedfordshire; Brighton UK
| | - P. W. Watt
- Centre for Sport and Exercise Science and Medicine (SESAME); Welkin Human Performance Laboratories; University of Brighton; Eastbourne UK
| | - N. S. Maxwell
- Centre for Sport and Exercise Science and Medicine (SESAME); Welkin Human Performance Laboratories; University of Brighton; Eastbourne UK
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18
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Ito A, Aoyama T, Tajino J, Nagai M, Yamaguchi S, Iijima H, Zhang X, Akiyama H, Kuroki H. Effects of the thermal environment on articular chondrocyte metabolism: a fundamental study to facilitate establishment of an effective thermotherapy for osteoarthritis. JOURNAL OF THE JAPANESE PHYSICAL THERAPY ASSOCIATION 2015; 17:14-21. [PMID: 25792904 DOI: 10.1298/jjpta.vol17_003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 04/07/2014] [Indexed: 12/15/2022]
Abstract
AIM To facilitate establishment of an effective thermotherapy for osteoarthritis (OA), we investigated the effects of the thermal environment on articular chondrocyte metabolism in vitro. METHODS Chondrocytes were isolated from porcine knee joints, and cultured at 32°C, 37°C and 41°C. Cell proliferation and viability were assessed at Days 2, 4 and 8. In addition, TdT-mediated dUTP nick end labeling (TUNEL) assay was performed at Day 3 to determine the proportion of apoptotic chondrocytes. Analysis of genes specific for factors related to the cartilage extracellular matrix (ECM), cartilage destruction, and cartilage protection was performed at Day 2. Furthermore, evaluation of heat stress tolerance, and heat shock protein 70 (HSP70) mRNA expression and protein synthesis was performed at Day 2 and 3, respectively. RESULTS Cell proliferation was more at 37°C than at 32°C and 41°C. Cell viability and the number of TUNEL-positive cells were not affected until Day 8 and 3, respectively. The expression of the ECM-related genes was up-regulated at higher temperature. The expression of MMP13, a type II collagen destructive enzyme, and that of TIMP1 and TIMP2, which are MMP inhibitors, were up-regulated at higher temperatures. Finally, the chondrocytes cultured at 41°C may acquire heat stress tolerance, in part, due to the up-regulation of HSP70, and may inhibit apoptosis induced by various stresses, which is observed in OA. CONCLUSIONS The thermal environment affects articular chondrocyte metabolism, and a heat stimulus of approximately 41°C could enhance chondrocyte anabolism and induce heat stress tolerance.
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Affiliation(s)
- Akira Ito
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan.,Research Fellow of Japan Society for the Promotion of Science, Tokyo 102-0083, Japan
| | - Tomoki Aoyama
- Department of Development and Rehabilitation of Motor Function, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Junichi Tajino
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Momoko Nagai
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Shoki Yamaguchi
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Hirotaka Iijima
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Xiangkai Zhang
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Haruhiko Akiyama
- Department of Orthopaedic Surgery, Graduate School of Medicine, Gifu University, Gifu 501-1194, Japan
| | - Hiroshi Kuroki
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
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19
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Ito A, Aoyama T, Tajino J, Nagai M, Yamaguchi S, Iijima H, Zhang X, Akiyama H, Kuroki H. Evaluation of reference genes for human chondrocytes cultured in several different thermal environments. Int J Hyperthermia 2014; 30:210-6. [PMID: 24773042 DOI: 10.3109/02656736.2014.906048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
PURPOSE The purpose of this study was to identify reference genes showing stable expression in chondrocytes cultured under several different thermal environments and in different culture systems. MATERIALS AND METHODS Human articular chondrocytes were cultured by monolayer or pellet culture system at 32 °C, 37 °C, and 41 °C for 3 days. Thereafter, the total RNA was extracted, and quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR) was performed. The qRT-PCR data was analysed using three different algorithms (geNorm, NormFinder, and BestKeeper) to identify reference genes exhibiting stable expression from among the seven candidate reference genes (B2M, ACTB, GAPDH, HSPCB, RPL13a, YWHAZ, and 18S). RESULTS The candidate reference genes, except for HSPCB and YWHAZ, showed systematic variations in expression. In the monolayer culture, RPL13a was the most stable gene identified using NormFinder and BestKeeper; on using geNorm, ACTB and GAPDH showed the highest expression stability. In the pellet culture, ACTB was the most stable gene identified using NormFinder and BestKeeper, whereas GAPDH and RPL13a were the most stable reference genes as determined using geNorm. In the combined group, B2M and GAPDH were the most stable genes identified using geNorm, whereas RPL13a and YWHAZ were the most stable as per NormFinder and BestKeeper, respectively. The best combination of two candidate reference genes among all the groups determined using NormFinder was RPL13a and YWHAZ. CONCLUSION The combination of RPL13a and YWHAZ might be suitable as reference genes for human chondrocytes cultured at 32 °C, 37 °C, and 41 °C in monolayer, pellet, or combined cultures.
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Affiliation(s)
- Akira Ito
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University , Kyoto
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20
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Morotomi T, Kitamura C, Okinaga T, Nishihara T, Sakagami R, Anan H. Continuous fever-range heat stress induces thermotolerance in odontoblast-lineage cells. Arch Oral Biol 2014; 59:741-8. [PMID: 24814171 DOI: 10.1016/j.archoralbio.2014.03.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Revised: 03/05/2014] [Accepted: 03/25/2014] [Indexed: 10/25/2022]
Abstract
OBJECTIVE Heat shock during restorative procedures can trigger damage to the pulpodentin complex. While severe heat shock has toxic effects, fever-range heat stress exerts beneficial effects on several cells and tissues. In this study, we examined whether continuous fever-range heat stress (CFHS) has beneficial effects on thermotolerance in the rat clonal dental pulp cell line with odontoblastic properties, KN-3. METHODS KN-3 cells were cultured at 41°C for various periods, and the expression level of several proteins was assessed by Western blot analysis. After pre-heat-treatment at 41°C for various periods, KN-3 cells were exposed to lethal severe heat shock (LSHS) at 49°C for 10min, and cell viability was examined using the MTS assay. Additionally, the expression level of odontoblast differentiation makers in surviving cells was examined by Western blot analysis. RESULTS CFHS increased the expression levels of several heat shock proteins (HSPs) in KN-3 cells, and induced transient cell cycle arrest. KN-3 cells, not pre-heated or exposed to CFHS for 1 or 3h, died after exposure to LSHS. In contrast, KN-3 cells exposed to CFHS for 12h were transiently lower on day 1, but increased on day 3 after LSHS. The surviving cells expressed odontoblast differentiation markers, dentine sialoprotein and dentine matrix protein-1. These results suggest that CFHS for 12h improves tolerance to LSHS by inducing HSPs expression and cell cycle arrest in KN-3 cells. CONCLUSIONS The appropriate pretreatment with continuous fever-range heat stress can provide protection against lethal heat shock in KN-3 cells.
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Affiliation(s)
- Takahiko Morotomi
- Division of Endodontics and Restorative Dentistry, Department of Oral Functions, Kyushu Dental University, Kitakyushu, Japan.
| | - Chiaki Kitamura
- Division of Endodontics and Restorative Dentistry, Department of Oral Functions, Kyushu Dental University, Kitakyushu, Japan
| | - Toshinori Okinaga
- Division of Infections and Molecular Biology, Department of Health Promotion, Kyushu Dental University, Kitakyushu, Japan
| | - Tatsuji Nishihara
- Division of Infections and Molecular Biology, Department of Health Promotion, Kyushu Dental University, Kitakyushu, Japan
| | - Ryuji Sakagami
- Section of Periodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
| | - Hisashi Anan
- Section of Operative Dentistry and Endodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
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21
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Soriano JJ, Mathieu-Denoncourt J, Norman G, de Solla SR, Langlois VS. Toxicity of the azo dyes Acid Red 97 and Bismarck Brown Y to Western clawed frog (Silurana tropicalis). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:3582-3591. [PMID: 24271729 DOI: 10.1007/s11356-013-2323-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Accepted: 11/04/2013] [Indexed: 06/02/2023]
Abstract
Azo compounds are used in a variety of industrial applications, such as textile colorant. Azo dyes have been found to contaminate aquatic environments and it has been shown that these compounds could potentially be toxic or induce endocrine disruption in aquatic organisms. However, there are few data available on the toxicity of these dyes, specifically Acid Red 97 (AR97) and Bismarck Brown Y (BBY). The aim of this study was to determine the toxicity and the endocrine-disrupting properties of AR97 and BBY in frogs. As fugacity modeling predicted that both compounds would sorb to sediment, sediment exposures were performed using a geometric range of concentrations (0, 1, 10, 100 and 1,000 ppm). Both AR97 and BBY dyes were not lethal to Silurana tropicalis embryos; however, BBY significantly induced malformations. Gene expression analysis of oxidative stress and mutagen-related genes was performed in BBY-treated larvae. There were significant two-fold increases of the tumor-suppressing protein p53 and heat shock protein 70 mRNA at 1,000 ppm suggesting that BBY induces cellular stress in early S. tropicalis development. Transcripts of the heat shock protein 90 did not change. Furthermore, reproductive-related genes were assessed and a 2.1-fold change was observed in the mRNA of the steroidogenic acute regulatory protein while steroid 5 alpha-reductase type 2 and androgen receptor transcript levels did not vary among treatments. In conclusion, high concentrations of BBY lead to increased developmental defects in frog embryogenesis and early larval development.
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Affiliation(s)
- Jeriel J Soriano
- Chemistry and Chemical Engineering Department, Royal Military College of Canada, P. O. Box 17000, Stn Forces, Kingston, ON, Canada, K7K 7B4
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22
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Pearce JA. Comparative analysis of mathematical models of cell death and thermal damage processes. Int J Hyperthermia 2013; 29:262-80. [PMID: 23738695 DOI: 10.3109/02656736.2013.786140] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The standard method for assessing hyperthermia treatment has been calculation of cumulative equivalent minutes at 43 °C, CEM43 and its variations. This parameter normalises treatment thermal histories rather than predicts treatment results. Arrhenius models have been widely used in analysing higher temperature thermal treatments and successfully employed to predict irreversible thermal alterations in structural proteins. Unfortunately, in many, but not all cases they fail to represent thermally induced damage or cell death at hyperthermic temperatures, 43-50 °C, exhibiting significant over-prediction of the initial 'shoulder' region. The failure arises from the simplifying assumptions used to derive the irreversible reaction format that has been used in thermal damage studies. Several successful multi-parameter fit methods have been employed to model cell survival data. The two-state statistical thermodynamic model was derived from basic thermodynamic principles. The three-state model results from relaxing the assumptions under the Arrhenius formulation that result in an irreversible reaction. In other cell processes studied in vitro the irreversible Arrhenius model holds, and is sufficient to provide an accurate and useful estimate of thermal damage and cell death. It is essential in numerical model work to include multiple thermal damage processes operating in parallel to obtain a clear image of the likely outcome in tissues. Arrhenius and other C(t) models have that capability, while a single value for CEM43, does not.
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Affiliation(s)
- John A Pearce
- Department of Electrical and Computer Engineering, University of Texas at Austin, TX 78712, USA.
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23
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Islam A, Deuster PA, Devaney JM, Ghimbovschi S, Chen Y. An exploration of heat tolerance in mice utilizing mRNA and microRNA expression analysis. PLoS One 2013; 8:e72258. [PMID: 23967293 PMCID: PMC3744453 DOI: 10.1371/journal.pone.0072258] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Accepted: 07/09/2013] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Individuals who rapidly develop hyperthermia during heat exposure (heat-intolerant) are vulnerable to heat associated illness and injury. We recently reported that heat intolerant mice exhibit complex alterations in stress proteins in response to heat exposure. In the present study, we further explored the role of genes and molecular networks associated with heat tolerance in mice. METHODOLOGY Heat-induced physiological and biochemical changes were assessed to determine heat tolerance levels in mice. We performed RNA and microRNA expression profiling on mouse gastrocnemius muscle tissue samples to determine novel biological pathways associated with heat tolerance. PRINCIPAL FINDINGS Mice (n = 18) were assigned to heat-tolerant (TOL) and heat-intolerant (INT) groups based on peak core temperatures during heat exposures. This was followed by biochemical assessments (Hsp40, Hsp72, Hsp90 and Hsf1 protein levels). Microarray analysis identified a total of 3,081 mRNA transcripts that were significantly misregulated in INT compared to TOL mice (p<0.05). Among them, Hspa1a, Dnajb1 and Hspb7 were differentially expressed by more than two-fold under these conditions. Furthermore, we identified 61 distinct microRNA (miRNA) sequences significantly associated with TOL compared to INT mice; eight miRNAs corresponded to target sites in seven genes identified as being associated with heat tolerance pathways (Hspa1a, Dnajb1, Dnajb4, Dnajb6, Hspa2, Hspb3 and Hspb7). CONCLUSIONS The combination of mRNA and miRNA data from the skeletal muscle of adult mice following heat stress provides new insights into the pathophysiology of thermoregulatory disturbances of heat intolerance.
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Affiliation(s)
- Aminul Islam
- Department of Military and Emergency Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America.
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Echchgadda I, Roth CC, Cerna CZ, Wilmink GJ. Temporal gene expression kinetics for human keratinocytes exposed to hyperthermic stress. Cells 2013; 2:224-43. [PMID: 24709698 PMCID: PMC3972685 DOI: 10.3390/cells2020224] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 03/29/2013] [Accepted: 04/02/2013] [Indexed: 01/06/2023] Open
Abstract
The gene expression kinetics for human cells exposed to hyperthermic stress are not well characterized. In this study, we identified and characterized the genes that are differentially expressed in human epidermal keratinocyte (HEK) cells exposed to hyperthermic stress. In order to obtain temporal gene expression kinetics, we exposed HEK cells to a heat stress protocol (44 °C for 40 min) and used messenger RNA (mRNA) microarrays at 0 h, 4 h and 24 h post-exposure. Bioinformatics software was employed to characterize the chief biological processes and canonical pathways associated with these heat stress genes. The data shows that the genes encoding for heat shock proteins (HSPs) that function to prevent further protein denaturation and aggregation, such as HSP40, HSP70 and HSP105, exhibit maximal expression immediately after exposure to hyperthermic stress. In contrast, the smaller HSPs, such as HSP10 and HSP27, which function in mitochondrial protein biogenesis and cellular adaptation, exhibit maximal expression during the “recovery phase”, roughly 24 h post-exposure. These data suggest that the temporal expression kinetics for each particular HSP appears to correlate with the cellular function that is required at each time point. In summary, these data provide additional insight regarding the expression kinetics of genes that are triggered in HEK cells exposed to hyperthermic stress.
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Affiliation(s)
- Ibtissam Echchgadda
- Air Force Research Laboratory, 711th Human Performance Wing, Human Effectiveness Directorate, Bioeffects Division, Radio Frequency Bioeffects Branch, 4141 Petroleum Road, Bldg. 3260, Fort Sam Houston, TX 78234, USA.
| | - Caleb C Roth
- Department of Radiology, University of Texas Health Science Center San Antonio, San Antonio, TX 78229, USA.
| | - Cesario Z Cerna
- General Dynamics Information Technology, Fort Sam Houston, TX 78234, USA.
| | - Gerald J Wilmink
- Air Force Research Laboratory, 711th Human Performance Wing, Human Effectiveness Directorate, Bioeffects Division, Radio Frequency Bioeffects Branch, 4141 Petroleum Road, Bldg. 3260, Fort Sam Houston, TX 78234, USA.
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Makowski AJ, Davidson JM, Mahadevan-Jansen A, Jansen ED. In vivo analysis of laser preconditioning in incisional wound healing of wild-type and HSP70 knockout mice with Raman spectroscopy. Lasers Surg Med 2012; 44:233-44. [PMID: 22275297 DOI: 10.1002/lsm.22002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/23/2011] [Indexed: 02/02/2023]
Abstract
BACKGROUND AND OBJECTIVE Laser preconditioning augments incisional wound healing by reducing scar tissue and increasing maximum tensile load of the healed wound [Wilmink et al. (2009) J Invest Dermatol 129(1): 205-216]. Recent studies have optimized treatments or confirmed results using HSP70 as a biomarker. Under the hypothesis that HSP70 plays a role in reported results and to better understand the downstream effects of laser preconditioning, this study utilized a probe-based Raman spectroscopy (RS) system to achieve an in vivo, spatio-temporal biochemical profile of murine skin incisional wounds as a function of laser preconditioning and the presence of HSP70. STUDY DESIGN/MATERIALS AND METHODS A total of 19 wild-type (WT) and HSP70 knockout (HSP70-/-) C57BL/6 mice underwent normal and laser preconditioned incisional wounds. Laser thermal preconditioning was conducted via previously established protocol (λ = 1.85 µm, H(0 ) = 7.64 mJ/cm(2) per pulse, spot diameter = 5 mm, Rep. rate = 50 Hz, τ(p) = 2 milliseconds, exposure time = 10 minutes) with an Aculight Renoir diode laser, with tissue temperature confirmed by real-time infrared camera measurements. Wound-healing progression was quantified by daily collection of a spatial distribution of Raman spectra. The results of RS findings were then qualified using standard histology and polarization microscopy. RESULTS Raman spectra yielded significant differences (t-test; α = 0.05) in several known biochemical peaks between WT and HSP70 (-/-) mice on wounds and in adjacent tissue early in the wound-healing process. Analysis of peak ratios implied (i) an increase in protein configuration in and surrounding the wound in WT mice, and (ii) an increased cellular trend in WT mice that was prolonged due to laser treatment. Polarization microscopy confirmed that laser treated WT mice showed increased heterogeneity in collagen orientation. CONCLUSIONS The data herein supports the theory that HSP70 is involved in normal skin protein configuration and the cellularity of early wound healing. Laser preconditioning extends cellular trends in the presence of HSP70. Despite study limitations, RS provided a non-invasive method for quantifying temporal trends in altered wound healing, narrowing candidates and design for future studies with clinically applicable instrumentation.
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Affiliation(s)
- Alexander J Makowski
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, USA
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Wang RE, Pandita RK, Cai J, Hunt CR, Taylor JS. Inhibition of heat shock transcription factor binding by a linear polyamide binding in an unusual 1:1 mode. Chembiochem 2012; 13:97-104. [PMID: 22134972 PMCID: PMC3516905 DOI: 10.1002/cbic.201100524] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Indexed: 11/05/2022]
Abstract
Heat shock proteins (HSPs) are known to protect cells from heat, oxidative stress, and the cytotoxic effects of drugs, and thus can enhance cancer cell survival. As a result, HSPs are a newly emerging class of protein targets for chemotherapy. Among the various HSPs, the HSP70 family is the most highly conserved and prevalent. Herein we describe the development of a β-alanine rich linear polyamide that binds the GGA heat shock elements (HSEs) 3 and 4 in the HSP70 promoter in an unusual 1:1 mode and inhibits heat shock transcription factor 1 (HSF1) binding in vitro.
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Affiliation(s)
- Rongsheng E. Wang
- Department of Chemistry, Washington University, St. Louis, MO 63130, USA
| | - Raj K. Pandita
- Radiation Oncology Department, Washington University School of Medicine, St. Louis, MO 63108, USA
| | - Jianfeng Cai
- Department of Chemistry, Washington University, St. Louis, MO 63130, USA
| | - Clayton R. Hunt
- Radiation Oncology Department, Washington University School of Medicine, St. Louis, MO 63108, USA
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Rylander MN, Stafford RJ, Hazle J, Whitney J, Diller KR. Heat shock protein expression and temperature distribution in prostate tumours treated with laser irradiation and nanoshells. Int J Hyperthermia 2011; 27:791-801. [DOI: 10.3109/02656736.2011.607485] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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Lazarev VF, Onokhin KV, Antimonova OI, Polonik SG, Guzhova IV, Margulis BA. Kinetics of chaperone activity of proteins Hsp70 and Hdj1 in human leukemia u-937 cells after preconditioning with thermal shock or compound u-133. BIOCHEMISTRY (MOSCOW) 2011; 76:590-5. [PMID: 21639839 DOI: 10.1134/s0006297911050099] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Kinetics of the chaperone activity of proteins Hsp70 and Hdj1 were analyzed in human U-937 promonocytes during their response to heat shock or to treatment with the echinochrome triacetyl glucoside derivative U-133. To measure the chaperone activity of both proteins, a special test was developed for their recognition and binding of a denatured protein. Using this test, the chaperone activity could be concurrently estimated in large numbers of cellular or tissue extracts. We also estimated the contents of both chaperones in cells by immunoblotting. The values for contents of Hsp70 and Hdj1 obtained by two independent test systems coincided, and this suggested that the substrate-binding activity could change proportionally to the chaperone content in the protein mixture. Therefore, the test developed by us can be employed for high throughput screening of drugs activating cellular chaperones. The analysis of quantity and activity of two cellular chaperones during the cell response to heat stress or to the drug-like substance U-133 showed that both factors caused the accumulation of chaperones with similar kinetics. We conclude that the efficiency of drug preconditioning could be close to the efficiency of hyperthermia and that the high activity of chaperones could be retained in human cells for no less than 1.5 days.
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Affiliation(s)
- V F Lazarev
- Institute of Cytology, Russian Academy of Sciences, St. Petersburg
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Mackanos MA, Contag CH. Pulse duration determines levels of Hsp70 induction in tissues following laser irradiation. JOURNAL OF BIOMEDICAL OPTICS 2011; 16:078002. [PMID: 21806294 DOI: 10.1117/1.3600013] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Induction of heat shock protein (Hsp) expression correlates with cytoprotection, reduced tissue damage, and accelerated healing in animal models. Since Hsps are transcriptionally activated in response to stress, they can act as stress indicators in burn injury or surgical procedures that produce heat and thermal change. A fast in vivo readout for induction of Hsp transcription in tissues would allow for the study of these proteins as therapeutic effect mediators and reporters of thermal stress∕damage. We used a transgenic reporter mouse in which a luciferase expression is controlled by the regulatory region of the inducible 70 kilodalton (kDa) Hsp as a rapid readout of cellular responses to laser-mediated thermal stress∕injury in mouse skin. We assessed the pulse duration dependence of the Hsp70 expression after irradiation with a CO(2) laser at 10.6 μm in wavelength over a range of 1000 to 1 ms. Hsp70 induction varied with changes in laser pulse durations and radiant exposures, which defined the ranges at which thermal activation of Hsp70 can be used to protect cells from subsequent stress, and reveals the window of thermal stress that tissues can endure.
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Affiliation(s)
- Mark A Mackanos
- Stanford University School of Medicine, Department of Pediatrics, Clark Center E-150, 318 Campus Drive, Stanford, California 94305-5427, USA
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Beckham JT, Wilmink GJ, Opalenik SR, Mackanos MA, Abraham AA, Takahashi K, Contag CH, Takahashi T, Jansen ED. Microarray analysis of cellular thermotolerance. Lasers Surg Med 2011; 42:752-65. [PMID: 21246580 DOI: 10.1002/lsm.20983] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
BACKGROUND AND OBJECTIVES Previously, we have shown that a 43°C pretreatment can provide thermotolerance to a following, more severe, thermal stress at 45°C. Using cells that lack the Hsp70 gene, we have also shown that there is still some thermotolerance in the absence of HSP70 protein. The purpose of this study was to determine which genes play a role in thermotolerance by measuring viability and proliferation of the cells at 2 days after heating. Specifically, we wanted to understand which pathways may be responsible for protecting cells in the absence of HSP70. STUDY DESIGN/MATERIALS AND METHODS Murine embryonic fibroblast cells with and without Hsp70 (MEF(+/+) and MEF(-/-), respectively) were exposed to a mild heat shock of 43°C for 30 minutes in a constant temperature water bath. After 3 hours of recovery, RNA was harvested from three heated samples alongside three untreated controls using a MicroRNeasy kit with DNAse treatment. RNA quality was verified by an Agilent Bioanalyzer. The RNA was then converted to cDNA and hybridized to Affymetrix gene expression DNA microarrays. The genes that showed a twofold change (up or down) relative to unheated controls were filtered by t-test for significance at a threshold of P < 0.05 using Genespring software. Data were verified by qRT-PCR. Genes were then categorized based upon their ontology. RESULTS While many genes were similarly upregulated, the main difference between cell types was an increase in transcription factors and nucleic acid binding proteins. Several genes known to be involved in the heat response were upregulated more than twofold (Hsp70, Hsp40, Hsp110, Hsp25, Atf3), however, another well studied heat responsive gene Hsp90 only increased by 1.5-fold under these conditions despite its role in thermotolerance. CONCLUSIONS The data herein presents genetic pathways which are candidates for further study of pretreatment protocols in laser irradiation.
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Affiliation(s)
- Josh T Beckham
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
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Close DM, Xu T, Sayler GS, Ripp S. In vivo bioluminescent imaging (BLI): noninvasive visualization and interrogation of biological processes in living animals. SENSORS 2010; 11:180-206. [PMID: 22346573 PMCID: PMC3274065 DOI: 10.3390/s110100180] [Citation(s) in RCA: 138] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2010] [Revised: 12/06/2010] [Accepted: 12/23/2010] [Indexed: 02/08/2023]
Abstract
In vivo bioluminescent imaging (BLI) is increasingly being utilized as a method for modern biological research. This process, which involves the noninvasive interrogation of living animals using light emitted from luciferase-expressing bioreporter cells, has been applied to study a wide range of biomolecular functions such as gene function, drug discovery and development, cellular trafficking, protein-protein interactions, and especially tumorigenesis, cancer treatment, and disease progression. This article will review the various bioreporter/biosensor integrations of BLI and discuss how BLI is being applied towards a new visual understanding of biological processes within the living organism.
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Affiliation(s)
- Dan M Close
- The Center for Environmental Biotechnology, 676 Dabney Hall, The University of Tennessee, Knoxville, TN 37996, USA.
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Desmons SO, Salleron J, Delfosse CJ, Falgayrac G, Penel G, Mordon SR. Laser preconditioning on cranial bone site: analysis of morphological vascular parameters. Lasers Surg Med 2010; 42:631-7. [PMID: 20976803 DOI: 10.1002/lsm.20971] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
BACKGROUND AND OBJECTIVES Bone vascularization is a key factor in the bone healing process following X-ray irradiation. Preserving the vascular network from X-ray-induced injury is a relevant approach in the promotion of bone healing. Previously, we developed a protocol of laser preconditioning (810 nm diode laser, 36 J/cm²) prior to X-ray radiation (18.75 Gy) which protects the bone vascular network from deleterious effects of X-ray radiation. The aim of this present work is to characterize the effects of laser preconditioning on the bone through a morphological analysis of vascular parameters. MATERIALS AND METHODS Digital images of the vascular plexus were taken through an optical bone chamber which was implanted onto the calvaria of rabbits. Bespoke software was used for the quantification of the vessels (classified in four groups according to their diameter), vessel length, and number of nodes at weeks 0, 4, and 8. Twenty rabbits were divided into four groups: control group #1 (n = 5); laser group #2 (n = 5). X-ray radiation group #3 (n = 5), laser preconditioning 24 hours prior to X-ray radiation group #4 (n = 5). RESULTS The bone vascular network was stable for groups #1 and #2. Statistical analysis showed a significant reduction of each observed vascular parameter for groups #3 and #4. In the laser preconditioned group #4 the loss was less marked than in the X-ray group #3, especially for large vessels (diameter >50 µm). DISCUSSION AND CONCLUSION We provide in vivo microcirculatory evidence to support the concept of laser preconditioning of bone. A computer-based semi-automatic system is described to quantify superficial bone vascular network parameters that had been treated by laser preconditioning prior to X-ray radiation. Laser preconditioning significantly attenuates the deletion of the superficial bone vascular network irradiated by X-ray, especially concerning large diameter vessels.
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Rylander MN, Feng Y, Zimmermann K, Diller KR. Measurement and mathematical modeling of thermally induced injury and heat shock protein expression kinetics in normal and cancerous prostate cells. Int J Hyperthermia 2010; 26:748-64. [DOI: 10.3109/02656736.2010.486778] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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Helbig D, Simon JC, Paasch U. Epidermal and dermal changes in response to various skin rejuvenation methods. Int J Cosmet Sci 2010; 32:458-69. [DOI: 10.1111/j.1468-2494.2010.00573.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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