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Faruk EM, Ibrahim F, Hassan MM, Kamal KM, Hassan DAA, Awwad AAE, Taha NM, Hablas MGA, Zaazaa AM, Ibrahim MH. Protective effects of quercetin against tongue injury and oxidative stress triggered by irinotecan: a histopathological, biochemical and molecular study. Toxicol Res (Camb) 2024; 13:tfae214. [PMID: 39703341 PMCID: PMC11652611 DOI: 10.1093/toxres/tfae214] [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: 08/05/2024] [Revised: 11/21/2024] [Accepted: 12/04/2024] [Indexed: 12/21/2024] Open
Abstract
Introduction About 80% of patients receiving chemotherapeutics suffer from side effects related to the gastrointestinal tract. Irinotecan (CPT-11) is a chemotherapeutic agent usually used in treating solid tumors. Quercetin (QRT), a bioflavonoid, is an antioxidant and scavenger reactive oxygen species scavenger. Objective The current study explored the possible protective effects of QRT against mucosal tongue injury caused by CPT-11. Methods The study included four equal groups: group 1/control, group 2/QRT, group 3/CPT-11, and group 4/CPT-11 + QRT. Results CPT-11-induced tongue injury in the form of non-healed ulcers, absent lingual papillae, mononuclear cells infiltration, marked deposition of collagen fibers, and overexpression of CD86 and tumor necrosis factor- α (TNF-α). The increased malondialdehyde levels, decreased superoxide dismutase and total antioxidant capacity revealed that there was an oxidative stress. Also, there was a decreased countenance of Ki-67 and Bcl-2 and an increased countenance of NF-κB. The QRT-treated group showed complete ulcer healing, with histological features almost like the control group, along with minimal collagen fiber deposition, decreased reactivity to CD86 and TNF-α and improvement of oxidative stress status and the molecular study results as well. Conclusion QRT possess protective properties against CPT-11-triggered tongue injury.
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Affiliation(s)
- Eman Mohamed Faruk
- Anatomy Department, College of Medicine, Umm Al-Qura University, Al Abidiyah, Makkah, Saudi Arabia
- Department of Histology and Cell Biology, Faculty of Medicine, Benha University, Al Nadi Al Ryadi, Qism Benha 13518, Benha, Al-Qalyubia Governorate, Egypt
| | - Fatma Ibrahim
- Department of Forensic Medicine and Clinical Toxicology, Faculty of Medicine, Zagazig University, Zagazig Rd inside Zagazig University, Shaibet an Nakareyah, Zagazig 44519, Al-Sharqia Governorate,Egypt
| | - Mahmoud M Hassan
- Department of Physiology, Faculty of Medicine, Benha University, Al Nadi Al Ryadi, Qism Benha, Al-Qalyubia Governorate, Benha 13518, Benha, Egypt
| | - Kamal M Kamal
- Department of Anatomy and Embryology, Faculty of Medicine, Benha University, Al Nadi Al Ryadi, Qism Benha, Al-Qalyubia Governorate, Benha 13518, Benha, Egypt
| | | | - Ayat Abu-elnasr Awwad
- Department of Otorhinolaryngology, Faculty of Medicine, Al-Azhar University, Cairo 11751, Cairo, Egypt
| | - Neama Mahmoud Taha
- Department of Physiology, Umm Al-Qura University, Al Abidiyah, Makkah, Saudi Arabia
| | | | - Ahmed Mohammed Zaazaa
- Student at Faculty of Medicine, Benha National University, Benha Colleges in Cairo, Main Axis of El-Obour City, Egypt
| | - Mai Hassan Ibrahim
- Department of Anatomy and Embryology, Faculty of Medicine, Benha University, Al Nadi Al Ryadi, Qism Benha, Al-Qalyubia Governorate, Benha 13518, Benha, Egypt
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Tomassini L, Lancia M, Scendoni R, Manta AM, Fruttini D, Terribile E, Gambelunghe C. Dating Skin Lesions of Forensic Interest by Immunohistochemistry and Immunofluorescence Techniques: A Scoping Literature Review. Diagnostics (Basel) 2024; 14:168. [PMID: 38248045 PMCID: PMC10814027 DOI: 10.3390/diagnostics14020168] [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: 12/04/2023] [Revised: 01/08/2024] [Accepted: 01/09/2024] [Indexed: 01/23/2024] Open
Abstract
Wound age estimation is a significant issue in forensic pathology. Although various methods have been evaluated, no gold standard system or model has been proposed, and accurate injury time estimation is still challenging. The distinction between vital skin wounds-i.e., ante-mortem lesions-and skin alterations that occur after death is a crucial goal in forensic pathology. Once the vitality of the wound has been confirmed, the assessment of the post-trauma interval (PTI) is also fundamental in establishing the causal relationship between the traumatic event and death. The most frequently used techniques in research studies are biochemistry, molecular biology, and immunohistochemistry (IHC). Biochemical methods take advantage of the chemical and physical techniques. A systematic literature search of studies started on 18 February 2023. The search was conducted in the main databases for biomedical literature, i.e., PubMed and Scopus, for papers published between 1973 and 2022, focusing on different techniques of immunohistochemistry and immunofluorescence (IF) for estimating the PTI of skin wounds. The present study involves a comprehensive and structured analysis of the existing literature to provide a detailed and comprehensive overview of the different IHC techniques used to date skin lesions, synthesize the available evidence, critically evaluate the methodologies, and eventually draw meaningful conclusions about the reliability and effectiveness of the different markers that have been discovered and used in wound age estimation.
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Affiliation(s)
- Luca Tomassini
- International School of Advanced Studies, University of Camerino, 62032 Camerino, Italy
| | - Massimo Lancia
- Forensic Medicine, Forensic Science and Sports Medicine Section, Department of Medicine and Surgery, University of Perugia, Piazza Lucio Severi, 06132 Perugia, Italy; (M.L.); (E.T.); (C.G.)
| | - Roberto Scendoni
- Department of Law, Institute of Legal Medicine, University of Macerata, 62100 Macerata, Italy;
| | - Anna Maria Manta
- Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza University, 00185 Rome, Italy;
| | - Daniela Fruttini
- Section of Internal Medicine and Endocrine and Metabolic Sciences, Department of Medicine and Surgery, University of Perugia, 06123 Perugia, Italy;
| | - Erika Terribile
- Forensic Medicine, Forensic Science and Sports Medicine Section, Department of Medicine and Surgery, University of Perugia, Piazza Lucio Severi, 06132 Perugia, Italy; (M.L.); (E.T.); (C.G.)
| | - Cristiana Gambelunghe
- Forensic Medicine, Forensic Science and Sports Medicine Section, Department of Medicine and Surgery, University of Perugia, Piazza Lucio Severi, 06132 Perugia, Italy; (M.L.); (E.T.); (C.G.)
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Deng B, Tang X, Wang Y. Role of microRNA-129 in cancer and non-cancerous diseases (Review). Exp Ther Med 2021; 22:918. [PMID: 34335879 PMCID: PMC8290460 DOI: 10.3892/etm.2021.10350] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 06/11/2021] [Indexed: 12/15/2022] Open
Abstract
An increasing number of studies indicate that microRNAs (miRNAs/miRs) are involved in diverse biological signaling pathways and play important roles in the progression of various diseases, including both oncological and non-oncological diseases. These small non-coding RNAs can block translation, resulting in a low expression level of target genes. miR-129 is an miRNA that has been the focus of considerable research in recent years. A growing body of evidence shows that the miR-129 family not only functions in cancer, including osteosarcoma, nasopharyngeal carcinoma, and ovarian, prostate, lung, breast and colon cancer, but also in non-cancerous diseases, including heart failure (HF), epilepsy, Alzheimer's disease (AD), obesity, diabetes and intervertebral disc degeneration (IVDD). It is therefore necessary to summarize current research progress on the role of miR-129 in different diseases. The present review includes an updated summary of the mechanisms of the miR-129 family in oncological and non-oncological diseases. To the best of our knowledge, this is the first review focusing on the role of miR-129 in non-cancerous diseases such as obesity, HF, epilepsy, diabetes, IVDD and AD.
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Affiliation(s)
- Bingpeng Deng
- Department of Forensic Science, School of Basic Medical Science, Central South University, Changsha, Hunan 410013, P.R. China
| | - Xuan Tang
- Department of Forensic Science, School of Basic Medical Science, Central South University, Changsha, Hunan 410013, P.R. China
| | - Yong Wang
- Department of Forensic Science, School of Basic Medical Science, Central South University, Changsha, Hunan 410013, P.R. China
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Ren K, Wang L, Wang L, Du Q, Cao J, Jin Q, An G, Li N, Dang L, Tian Y, Wang Y, Sun J. Investigating Transcriptional Dynamics Changes and Time-Dependent Marker Gene Expression in the Early Period After Skeletal Muscle Injury in Rats. Front Genet 2021; 12:650874. [PMID: 34220936 PMCID: PMC8248501 DOI: 10.3389/fgene.2021.650874] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 05/07/2021] [Indexed: 12/21/2022] Open
Abstract
Following skeletal muscle injury (SMI), from post-injury reaction to repair consists of a complex series of dynamic changes. However, there is a paucity of research on detailed transcriptional dynamics and time-dependent marker gene expression in the early stages after SMI. In this study, skeletal muscle tissue in rats was taken at 4 to 48 h after injury for next-generation sequencing. We examined the transcriptional kinetics characteristics during above time periods after injury. STEM and maSigPro were used to screen time-correlated genes. Integrating 188 time-correlated genes with 161 genes in each time-related gene module by WGCNA, we finally identified 18 network-node regulatory genes after SMI. Histological staining analyses confirmed the mechanisms underlying changes in the tissue damage to repair process. Our research linked a variety of dynamic biological processes with specific time periods and provided insight into the characteristics of transcriptional dynamics, as well as screened time-related biological indicators with biological significance in the early stages after SMI.
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Affiliation(s)
- Kang Ren
- School of Forensic Medicine, Shanxi Medical University, Jinzhong, China.,Department of Basic Medicine, Changzhi Medical College, Changzhi, China
| | - Liangliang Wang
- School of Forensic Medicine, Shanxi Medical University, Jinzhong, China
| | - Liang Wang
- School of Forensic Medicine, Shanxi Medical University, Jinzhong, China
| | - Qiuxiang Du
- School of Forensic Medicine, Shanxi Medical University, Jinzhong, China
| | - Jie Cao
- School of Forensic Medicine, Shanxi Medical University, Jinzhong, China
| | - Qianqian Jin
- School of Forensic Medicine, Shanxi Medical University, Jinzhong, China
| | - Guoshuai An
- School of Forensic Medicine, Shanxi Medical University, Jinzhong, China
| | - Na Li
- School of Forensic Medicine, Shanxi Medical University, Jinzhong, China
| | - Lihong Dang
- School of Forensic Medicine, Shanxi Medical University, Jinzhong, China
| | - Yingjie Tian
- School of Forensic Medicine, Shanxi Medical University, Jinzhong, China
| | - Yingyuan Wang
- School of Forensic Medicine, Shanxi Medical University, Jinzhong, China
| | - Junhong Sun
- School of Forensic Medicine, Shanxi Medical University, Jinzhong, China
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Yan Y, Zhang J, Yi S, Liu L, Huang C. Lighting up forensic science by aggregation-induced emission: A review. Anal Chim Acta 2020; 1155:238119. [PMID: 33766314 DOI: 10.1016/j.aca.2020.11.051] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 11/15/2020] [Accepted: 11/27/2020] [Indexed: 01/30/2023]
Abstract
Forensic science requires a fast, sensitive, and anti-interfering imaging tool for on-site investigation and bio-analysis. The aggregation-induced emission (AIE) phenomenon exhibits remarkable luminescence properties (large Stokes shift, diverse molecular structures, and high photo-stability), which can provide a viable solution for on-site analysis, while at the same time overcoming the problem of aggregation-caused quenching (ACQ). Based on the outstanding performance in chemical analysis and bio-sensing, AIE materials have great prospects in the field of forensic science. Therefore, the application of AIE in forensic science has been summarized for the first time in this article. After a brief introduction to the concept and development of AIE, its applications in the determination of toxic or hazardous substances, based on data on poisoning deaths, has been summarized. Subsequently, besides the bio-imaging function, other applications of AIE in analyzing markers related to forensic genetics, forensic pathology, (focusing on the corpse) and clinical forensics (focusing on the living) have been discussed. In addition, applications of AIE molecules in criminal investigations, including recognition of fingerprints and blood stains, detection of explosives and chemical warfare agents, and anti-counterfeiting have also been presented. It is hoped that this review will light up the future of forensic science by stimulating more research work on the suitability of AIE materials in advancing forensic science.
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Affiliation(s)
- Yibo Yan
- Department of Forensic Medicine, Tongji Medical School, Huazhong University of Science and Technology, Hangkong Road #13, Wuhan, 430030, China
| | - Junchao Zhang
- Department of Forensic Medicine, Tongji Medical School, Huazhong University of Science and Technology, Hangkong Road #13, Wuhan, 430030, China
| | - Shaohua Yi
- Department of Forensic Medicine, Tongji Medical School, Huazhong University of Science and Technology, Hangkong Road #13, Wuhan, 430030, China
| | - Liang Liu
- Department of Forensic Medicine, Tongji Medical School, Huazhong University of Science and Technology, Hangkong Road #13, Wuhan, 430030, China.
| | - Chuixiu Huang
- Department of Forensic Medicine, Tongji Medical School, Huazhong University of Science and Technology, Hangkong Road #13, Wuhan, 430030, China.
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Faruk EM, Nafea OE, Fouad H, Ebrahim UFA, Hasan RAA. Possible healing effects of Salvadora persica extract (MISWAK) and laser therapy in a rabbit model of a caustic-induced tongue ulcers: histological, immunohistochemical and biochemical study. J Mol Histol 2020; 51:341-352. [PMID: 32472334 DOI: 10.1007/s10735-020-09884-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 05/23/2020] [Indexed: 12/24/2022]
Abstract
Caustic ingestion is a potentially detrimental event that can cause serious devastating damage on contact with tissues. Local exposure is associated with severe pain, swelling and ulceration. Caustics-induced oral ulcers can be painful enough to compromise the patient's quality of life. Treatment of oral ulcers is crucial in clinical practice. Albeit, some ulcers do not respond adequately to the conventional treatment. The current study was conducted to evaluate the potential healing effects of topical Salvadora persica (SP) extract, low-level laser (LLL) and high-level laser (HLL) therapies in a rabbit model of caustic-induced tongue ulcers and explore the underlying mechanisms. Fifty male rabbits with a caustic induced tongue ulcers were included in the study. Rabbits were equally divided into four groups: positive control (ulcer) group, SP, LLL and HLL groups in addition to the negative control (healthy) group. All treatments were given thrice weekly for 14 days. Results showed that acetic acid-induced tongue ulcers caused extensive structural tongue damage secondary to overexpression of apoptotic BAX, pathological angiogenesis indicated by VEGF overexpression, marked collagen fibers deposition as well as upregulation of tissue pro-inflammatory TNF-α and upregulation of tissue anti-inflammatory IL-10. The healing potential of topical SP, LLL and HLL therapy are mostly comparable. In conclusion, acetic acid-induced extensive tongue damage. Topical SP extract, LLL and HLL are equally effective therapies against caustics-induced tongue ulcers. However, we recommend SP extract, owing to its safety, non-invasiveness, availability and low cost.
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Affiliation(s)
- Eman Mohamed Faruk
- Histology and Cell Biology Department, Faculty of Medicine, Benha University, Benha, Egypt.
| | - Ola Elsayed Nafea
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Hanan Fouad
- Medical Biochemistry and Molecular Biology, Faculty of Medicine, Cairo University, Giza, Egypt
| | | | - Rehab Abd Allah Hasan
- Histology and Cell Biology Department, Faculty of Medicine for Girls (AFMG), Al-Azhar University, Cairo, Egypt
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Umehara T, Mori R, Mace KA, Murase T, Abe Y, Yamamoto T, Ikematsu K. Identification of Specific miRNAs in Neutrophils of Type 2 Diabetic Mice: Overexpression of miRNA-129-2-3p Accelerates Diabetic Wound Healing. Diabetes 2019; 68:617-630. [PMID: 30523028 DOI: 10.2337/db18-0313] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 11/29/2018] [Indexed: 01/14/2023]
Abstract
Neutrophils are involved in the first stage of acute inflammation. After injury, they are mobilized and recruited to the injured tissue. In diabetes, wound healing is delayed and aberrant, leading to excessive recruitment and retention of neutrophils that fail to promote angiogenesis and prolong inflammation. However, the exact pathological mechanisms of diabetic-derived neutrophils in chronic inflammation remain unclear. Here, miRNA profiling of neutrophils from bone marrow in type 2 diabetic mice was performed using a microarray. miRNAs regulate the posttranscriptional expression of target mRNAs and are important in countering inflammation-related diseases. Our study revealed that miRNAs exhibit differential expression in diabetic-derived neutrophils compared with non-diabetic-derived neutrophils, especially miR-129 family members. miR-129-2-3p directly regulated the translation of Casp6 and Ccr2, which are involved in inflammatory responses and apoptosis. Furthermore, miR-129-2-3p overexpression at the wound site of type 2 diabetic mice accelerated wound healing. These results suggest possible involvement of miR-129-2-3p in diabetic-derived neutrophil dysfunction and that retention kinetics of neutrophils and chronic inflammation may be initiated through miR-129-2-3p-regulated genes. This study characterizes changes in global miRNA expression in diabetic-derived neutrophils and systematically identifies critical target genes involved in certain biological processes related to the pathology of diabetic wound healing.
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Affiliation(s)
- Takahiro Umehara
- Division of Forensic Pathology and Science, Unit of Social Medicine, Course of Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University School of Medicine, Nagasaki, Japan
| | - Ryoichi Mori
- Department of Pathology, Nagasaki University School of Medicine and Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kimberly A Mace
- Division of Cell Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, U.K
| | - Takehiko Murase
- Division of Forensic Pathology and Science, Unit of Social Medicine, Course of Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University School of Medicine, Nagasaki, Japan
| | - Yuki Abe
- Division of Forensic Pathology and Science, Unit of Social Medicine, Course of Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University School of Medicine, Nagasaki, Japan
| | - Takuma Yamamoto
- Division of Forensic Pathology and Science, Unit of Social Medicine, Course of Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University School of Medicine, Nagasaki, Japan
| | - Kazuya Ikematsu
- Division of Forensic Pathology and Science, Unit of Social Medicine, Course of Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University School of Medicine, Nagasaki, Japan
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Tian ZL, Jiang SK, Zhang M, Wang M, Li JY, Zhao R, Wang LL, Li SS, Liu M, Zhang MZ, Guan DW. Detection of satellite cells during skeletal muscle wound healing in rats: time-dependent expressions of Pax7 and MyoD in relation to wound age. Int J Legal Med 2015; 130:163-72. [PMID: 26311174 DOI: 10.1007/s00414-015-1251-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 08/12/2015] [Indexed: 12/20/2022]
Abstract
The study was focused on time-dependent expressions of paired-box transcription factor 7 (Pax7) and myoblast determination protein (MyoD) during skeletal muscle wound healing. An animal model of skeletal muscle contusion was established in 40 Sprague-Dawley male rats. Samples were taken at 1, 3, 5, 7, 9, 13, 17, and 21 days after injury, respectively (five rats in each posttraumatic interval). Five rats were employed as control. By morphometric analysis, the data based on the number of Pax7(+)/MyoD(-), Pax7(+)/MyoD(+), and Pax7(-)/MyoD(+) cells were highly correlated with the wound age. Pax7 and MyoD expressions were upregulated after injury by Western blot and quantitative real-time PCR assays. The relative quantity of Pax7 protein peaked at 5 days after injury, which was >1.13, and decreased thereafter. Similarly, the relative quantity of MyoD mRNA expression peaked at 3 days after injury, which was >2.59. The relative quantity of Pax7 protein >0.73 or mRNA expression >2.38 or the relative quantity of MyoD protein >1.33 suggested a wound age of 3 to 7 days. The relative quantity of MyoD mRNA expression >2.02 suggested a wound age of 1 to 7 days post-injury. In conclusion, the expressions of Pax7 and MyoD are upregulated in a time-dependent manner during skeletal muscle wound healing, suggesting that Pax7 and MyoD may be potential markers for wound age estimation in skeletal muscle.
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Affiliation(s)
- Zhi-Ling Tian
- Department of Forensic Pathology, China Medical University School of Forensic Medicine, No.77, Puhe Road, Shenbei New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Shu-Kun Jiang
- Department of Forensic Pathology, China Medical University School of Forensic Medicine, No.77, Puhe Road, Shenbei New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Miao Zhang
- Department of Forensic Pathology, China Medical University School of Forensic Medicine, No.77, Puhe Road, Shenbei New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Meng Wang
- Department of Forensic Pathology, China Medical University School of Forensic Medicine, No.77, Puhe Road, Shenbei New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Jiao-Yong Li
- Department of Forensic Pathology, China Medical University School of Forensic Medicine, No.77, Puhe Road, Shenbei New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Rui Zhao
- Department of Forensic Pathology, China Medical University School of Forensic Medicine, No.77, Puhe Road, Shenbei New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Lin-Lin Wang
- Department of Forensic Pathology, China Medical University School of Forensic Medicine, No.77, Puhe Road, Shenbei New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Shan-Shan Li
- Department of Forensic Pathology, China Medical University School of Forensic Medicine, No.77, Puhe Road, Shenbei New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Min Liu
- Department of Forensic Pathology, China Medical University School of Forensic Medicine, No.77, Puhe Road, Shenbei New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Meng-Zhou Zhang
- Department of Forensic Pathology, China Medical University School of Forensic Medicine, No.77, Puhe Road, Shenbei New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Da-Wei Guan
- Department of Forensic Pathology, China Medical University School of Forensic Medicine, No.77, Puhe Road, Shenbei New Area, Shenyang, 110122, Liaoning Province, People's Republic of China.
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Fan YY, Zhang ST, Yu LS, Ye GH, Lin KZ, Wu SZ, Dong MW, Han JG, Feng XP, Li XB. The time-dependent expression of α7nAChR during skeletal muscle wound healing in rats. Int J Legal Med 2014; 128:779-86. [PMID: 24781786 DOI: 10.1007/s00414-014-1001-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 04/16/2014] [Indexed: 11/30/2022]
Abstract
The study on time-dependent expression of α7 nicotine acetylcholine receptor (α7nAChR) was performed by immunohistochemistry, Western blotting, and real-time PCR during skeletal muscle wound healing in rats. Furthermore, co-localization of α7nAChR with macrophage or myofibroblast marker was detected by double immunofluorescence. A total of 50 Sprague-Dawley male rats were divided into control and contusion groups (3 h, 6 h, 12 h, 1 day, 3 days, 5 days, 7 days, 10 days, and 14 days post-injury). In the uninjured controls, α7nAChR positive staining was observed in the sarcolemma and sarcoplasm of normal myofibers. In wounded specimens, a small number of polymorphonuclear cells, a number of macrophages and myofibroblasts showed positive reaction for α7nAChR in contused zones. Morphometrically, the average ratios of α7nAChR-positive cells were over 50 % from 3 to 10 days after contusion, and exceeded 60 % at 5 and 7 days post-injury. Besides, the positive ratios of α7nAChR were <50 % at the other posttraumatic intervals. By Western blotting analysis, the average ratio of α7nAChR protein expression maximized at 7 days after injury, which was >2.13. Similarly, the relative quantity of α7nAChR mRNA expression peaked at 7 days post-wounding as compared with control by real-time PCR detection, showing a relative quantity of >2.65. In conclusion, the expression of α7nAChR is upregulated and temporally distributed in macrophages and myofibroblasts during skeletal muscle wound healing, which might be closely involved in inflammatory response and fibrotic repair after injury. Moreover, α7nAChR is promising as a useful marker for wound age determination of skeletal muscle.
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Affiliation(s)
- Yan-Yan Fan
- Department of Forensic Medicine, School of Basic Medical Science, Wenzhou Medical University, Wenzhou, Zhejiang Province, 325035, People's Republic of China,
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Nassar D, Letavernier E, Baud L, Aractingi S, Khosrotehrani K. Calpain activity is essential in skin wound healing and contributes to scar formation. PLoS One 2012; 7:e37084. [PMID: 22615899 PMCID: PMC3353912 DOI: 10.1371/journal.pone.0037084] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Accepted: 04/18/2012] [Indexed: 12/23/2022] Open
Abstract
Wound healing is a multistep phenomenon that relies on complex interactions between various cell types. Calpains are ubiquitously expressed proteases regulating several processes including cellular adhesion and motility as well as inflammation and angiogenesis. Calpains can be targeted by inhibitors, and their inhibition was shown to reduce organ damage in various disease models. We aimed to assess the role of calpains in skin healing and the potential benefit of calpain inhibition on scar formation. We used a pertinent model where calpain activity is inhibited only in lesional organs, namely transgenic mice overexpressing calpastatin (CPST), a specific natural calpain inhibitor. CPST mice showed a striking delay in wound healing particularly in the initial steps compared to wild types (WT). CPST wounds displayed reduced proliferation in the epidermis and delayed re-epithelization. Granulation tissue formation was impaired in CPST mice, with a reduction in CD45+ leukocyte infiltrate and in CD31+ blood vessel density. Interestingly, wounds on WT skin grafted on CPST mice (WT/CPST) showed a similar delayed healing with reduced angiogenesis and inflammation compared to wounds on WT/WT mice demonstrating the implication of calpain activity in distant extra-cutaneous cells during wound healing. CPST wounds showed a reduction in alpha-smooth muscle actin (αSMA) expressing myofibroblasts as well as αSMA RNA expression suggesting a defect in granulation tissue contraction. At later stages of skin healing, calpain inhibition proved beneficial by reducing collagen production and wound fibrosis. In vitro, human fibroblasts exposed to calpeptin, a pan-calpain inhibitor, showed reduced collagen synthesis, impaired TGFβ-induced differentiation into αSMA-expressing myofibroblasts, and were less efficient in a collagen gel contraction assay. In conclusion, calpains are major players in granulation tissue formation. In view of their specific effects on fibroblasts a late inhibition of calpains should be considered for scar reduction.
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Affiliation(s)
- Dany Nassar
- Université Pierre et Marie Curie-Paris 6, UMRS938, Paris, France.
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Yu TS, Cheng ZH, Li LQ, Zhao R, Fan YY, Du Y, Ma WX, Guan DW. The cannabinoid receptor type 2 is time-dependently expressed during skeletal muscle wound healing in rats. Int J Legal Med 2010; 124:397-404. [DOI: 10.1007/s00414-010-0465-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2010] [Accepted: 04/29/2010] [Indexed: 01/06/2023]
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