Tissue & cellPub Date : 2024-08-10DOI: 10.1016/j.tice.2024.102517
Ahmed M. Rashwan , Samir A.A. El-Gendy , Ahmed A. El-Mansi , Mamdouh B. Eldesoqui , Mohamed A.M. Alsafy
{"title":"A novel immunofluorescence study of Lingual Salivary Glands in the Egyptian Tortoise (Testudo kleinmanni) and its ecological significance","authors":"Ahmed M. Rashwan , Samir A.A. El-Gendy , Ahmed A. El-Mansi , Mamdouh B. Eldesoqui , Mohamed A.M. Alsafy","doi":"10.1016/j.tice.2024.102517","DOIUrl":"10.1016/j.tice.2024.102517","url":null,"abstract":"<div><p>The Egyptian tortoise (<em>Testudo kleinmanni</em>) is remarkably adapted to its harsh desert environment, a characteristic that is crucial for its survival under extreme conditions. This study was aimed at providing a deeper understanding of the lingual salivary gland structures in the Egyptian tortoise and examining how these structures help the tortoise manage hydration and nutrition in arid conditions. Utilizing a combination of light microscopy and immunofluorescence, this research introduced pioneering methods involving seven different antibodies, marking a first in the study of reptilian salivary glands. Our investigations categorized the tortoise’s salivary glands into papillary and non-papillary types. The papillary glands were further classified into superficial, deep, interpapillary, and intraepithelial salivary glands, while non-papillary glands included superficial and deep lingual types. Structurally, these glands are organized into lobules, delineated by interlobular septa, and are equipped with a duct system comprising interlobular, intercalated, and main excretory ducts with gland openings on the tongue's surface and the papillae surfaces. Notably, the superficial glands displayed both tubuloalveolar and acinar configurations, whereas the deep lingual glands were exclusively acinar. Immunofluorescence results indicated that α-smooth muscle actin (α-SMA) was prevalent in myoepithelial cells, myofibroblasts, and blood vessels, suggesting their integral role in glandular function and support. E-cadherin was predominantly found in epithelial cells, enhancing cell adhesion and integrity, which are critical for efficient saliva secretion. Importantly, Mucin 1 (MUC1) and Mucin 5B (MUC5B) staining revealed that most glands were mucous in nature, with MUC5B specifically marking mucin within secretory cells, confirming their primary function in mucous secretion. PDGFRα and CD34 highlighted the presence of telocytes and stromal cells within the glandular and interlobular septa, indicating a role in structural organization and possibly in regenerative processes. Cytokeratin 14 expression was noted in the basal cells of the glands, underscoring its role in upholding the structural foundation of the epithelial barrier. In conclusion, this detailed morphological and immunological characterization of the Egyptian tortoise’s salivary glands provides new insights into their complex structure and essential functions. These findings not only enhance our understanding of reptilian physiology but also underline the critical nature of salivary glands in supporting life in arid environments. This study's innovative use of a broad range of immunofluorescence markers opens new avenues for further research into the adaptive mechanisms of reptiles.</p></div>","PeriodicalId":23201,"journal":{"name":"Tissue & cell","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141976703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tissue & cellPub Date : 2024-08-09DOI: 10.1016/j.tice.2024.102494
Yuchu Yuan , Meizhu Xue , Feng Zhou , Lifang Gu
{"title":"USP13 promotes acute myeloid leukemia cell proliferation and autophagy by promoting ATG5","authors":"Yuchu Yuan , Meizhu Xue , Feng Zhou , Lifang Gu","doi":"10.1016/j.tice.2024.102494","DOIUrl":"10.1016/j.tice.2024.102494","url":null,"abstract":"<div><h3>Objective</h3><p>To elucidate the role of USP13 in acute myeloid leukemia (AML) by investigating its effects on cell growth, apoptosis and autophagy, and to explore the underlying mechanisms.</p></div><div><h3>Methods</h3><p>The expression of USP13 in AML cells was assessed using quantitative PCR (qPCR) and immunoblotting. Cell Counting Kit-8 (CCK-8) and Edu staining were employed to evaluate the impact of USP13 on AML cell growth. Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) and immunostaining assays were conducted to examine the effects of USP13 on apoptosis and autophagy in AML cells, and immunoblot assays were performed to determine the potential underlying mechanistic pathway.</p></div><div><h3>Results</h3><p>USP13 expression was significantly elevated in AML cells, correlating with enhanced cell proliferation and resistance to apoptosis. Moreover, USP13 promoted autophagy in AML cells. Mechanistically, USP13 was found to be associated with upregulating ATG5 expression, which promoted AML progression.</p></div><div><h3>Conclusion</h3><p>USP13 promotes AML cell growth and autophagy by upregulating ATG5.</p></div>","PeriodicalId":23201,"journal":{"name":"Tissue & cell","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142099125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tissue & cellPub Date : 2024-08-09DOI: 10.1016/j.tice.2024.102522
Michela De Pellegrin, Anja Reck, Christian Morsczeck
{"title":"Sclerostin inhibits Protein kinase C inhibitor GÖ6976 induced osteogenic differentiation of dental follicle cells","authors":"Michela De Pellegrin, Anja Reck, Christian Morsczeck","doi":"10.1016/j.tice.2024.102522","DOIUrl":"10.1016/j.tice.2024.102522","url":null,"abstract":"<div><p>Human dental follicle cells (DFCs) as multipotent stem cells are currently investigated within the field of regenerative medicine considering their potential for the regeneration of dental tissues, bone defects caused by periodontal or degenerative diseases and the treatment of craniofacial disorders. However, molecular mechanisms of the differentiation into mineralizing cells are still inadequately understood. Previous studies have shown that GÖ6976, an inhibitor of classical isoforms of protein kinase C (PKC), enhanced ostogenic differentiation of DFCs. A possible mechanism for increased osteogenic differentiation could be the regulation of ossification inhibitors. This study therefore investigated whether the osteogenic differentiation inhibitor sclerostin (SOST) is regulated by GÖ6976 and whether the addition of sclerostin attenuates the stimulating effect of the PKC inhibitor. We demonstrated that the expression of the sclerostin gene decreased after PKC inhibition by GÖ6976 and that its gene expression is likely maintained by PKC via the BMP signaling pathway. Furthermore, supplementation of osteogenic differentiation medium with sclerostin impairs GÖ6976-induced differentiation of DFCs. Our data suggest that regulation of sclerostin mediates PKC inhibition-induced mineralization of DFCs.</p></div>","PeriodicalId":23201,"journal":{"name":"Tissue & cell","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142021325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tissue & cellPub Date : 2024-08-09DOI: 10.1016/j.tice.2024.102520
Jirui Wen , Zhengdong Lin , Juan Cheng , Can Li , Ling Wang , Yuhao Zou , Xuehong Wan , Jifeng Liu , Jiang Wu
{"title":"Heat acclimation alleviates the heat stress-induced impairment of vascular endothelial cells","authors":"Jirui Wen , Zhengdong Lin , Juan Cheng , Can Li , Ling Wang , Yuhao Zou , Xuehong Wan , Jifeng Liu , Jiang Wu","doi":"10.1016/j.tice.2024.102520","DOIUrl":"10.1016/j.tice.2024.102520","url":null,"abstract":"<div><p>Heat acclimation (HA) is found to help decrease the incidence of heat-related illnesses such as heat syncope and exertional heat stroke. However, the response of vascular endothelial cells to HA remain to be elucidated. In this study, mouse brain microvascular endothelial cells (bEnd.3), human umbilical vein endothelial cells (HUVEC), and human aortic endothelial cells (HAEC) were selected. The cells were first subjected to HA at 40 ℃ for 2 h per day for 3 days, and then subjected to heat stress at 43 ℃ for 2 h or 4 h. After heat stress, HA-pretreated cells showed a significant increase in cell viability, cell integrity, a decrease in the proportion of S phase cells, cell apoptosis, and cytoskeletal shrinkage compared with the cells without HA pretreatment. Additionally, the expression of VEGF, ICAM-1, iNOS and EPO in HA-pretreated cells significantly increased. We also presented evidence that HA upregulated HSP70 and bcl-2, while downregulated p-p53 and bax. Notably, the suppression of HSP70 expression attenuated the protective role of heat acclimation. Furthermore, HA mitigated injuries in vital organs of mice exposed to heat stress. Conclusively, these findings indicated the HA can increase the vitality of vascular endothelial cells after heat stress, partially restore the function of vascular endothelial cells, and this protective effect may be related to the upregulation of HSP70 expression.</p></div>","PeriodicalId":23201,"journal":{"name":"Tissue & cell","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141976704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tissue & cellPub Date : 2024-08-09DOI: 10.1016/j.tice.2024.102519
Ebtesam S. Al-Sheddi , Nida N. Farshori , Mai M. Al-Oqail , Fdyah Alblwi , Javed Ahmad , Abdulaziz A. Al-Khedhairy , Maqsood A. Siddiqui
{"title":"Hepatoprotective effect of date fruit extract against ethanol-induced apoptosis in human hepatoma (HepG2) cells","authors":"Ebtesam S. Al-Sheddi , Nida N. Farshori , Mai M. Al-Oqail , Fdyah Alblwi , Javed Ahmad , Abdulaziz A. Al-Khedhairy , Maqsood A. Siddiqui","doi":"10.1016/j.tice.2024.102519","DOIUrl":"10.1016/j.tice.2024.102519","url":null,"abstract":"<div><p>Ethanol is a well-known hepatotoxic agent and date fruits have been associated with their biological actions. In current study, we have investigated the hepatoprotective potential of DFE on ethanol-induced cellular damages in human hepatoma (HepG2) cells. The hepatoprotective potential was assessed by exposing the HepG2 cells to non-toxic concentrations (15, 30, and 60 μg/mL) of DFE for 24 h; then toxic concentration (500 μM) of ethanol. Our results demonstrated that pretreatment with DFE significantly prohibited ethanol-induced hepatotoxicity in HepG2 cells. We observed that DFE treatment increased cell viability, reduced LDH leakage, restored cellular morphology, and inhibited caspase-3 enzyme activity in a dose dependent way, induced by ethanol. Further DFE was also effective in restoring the LPO, GSH, and catalase levels towards normal altered by ethanol. Our results also revealed that ethanol-induced ROS generation was significantly inhibited by DFE. The ethanol-induced mRNA expression of apoptotic related genes (p53, caspase-3, caspase-7, Bax, and Bcl-2) were also normalized by pretreatment with DFE. The findings from this study indicated that DFE can significantly protect HepG2 cells against ethanol-induced hepatotoxicity. Our study also provides scientific validation for the traditional use of DFE, aiming to understand its hepatoprotective potential. Altogether, to the best of our knowledge, this is the first study demonstrated that ethanol-induced hepatotoxicity can be prohibited by the DFE. Thus, DFE has a potential application in nutraceuticals as a therapeutic agent to prevent liver diseases.</p></div>","PeriodicalId":23201,"journal":{"name":"Tissue & cell","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141978879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tissue & cellPub Date : 2024-08-08DOI: 10.1016/j.tice.2024.102514
L. Hubbard , O.P. Dougherty , E.E. Kimball
{"title":"Characterization of non-epithelial cells embedded within the vocal fold epithelial barrier","authors":"L. Hubbard , O.P. Dougherty , E.E. Kimball","doi":"10.1016/j.tice.2024.102514","DOIUrl":"10.1016/j.tice.2024.102514","url":null,"abstract":"<div><p>The vocal folds vibrate to produce voice, undergoing significant stress due to contact and shearing force. The epithelium operates as the primary protective layer of the tissue against stress and vibratory damage, as well as to provide a barrier against foreign organisms and toxins. Within the vocal fold epithelium, non-epithelial cells were identified that may interrupt the epithelium and compromise the epithelial barrier’s protective function. Human vocal fold samples with a variety of pathologies were compared to normal vocal folds. Analysis included the number of cells in the epithelium and epithelial thickness. Vocal fold sections from 10 human tissue samples were assessed via H&E staining and immunofluorescent co-labeling. Three cell populations (vimentin expressing, CD-45 expressing, and cells expressing both) were identified within the epithelium. Statistical analysis revealed that the abnormal samples had a significantly greater number of vimentin-positive cells/area within the epithelium compared to the normal samples. Additionally, normal tissue samples had a significantly greater epithelial depth, suggesting a more robust epithelial barrier compared to tissue with pathology. Knowledge of the function of these cells could lead to a better understanding of how the local immune environment near and within vocal fold epithelium changes in the presence of different pathologies.</p></div>","PeriodicalId":23201,"journal":{"name":"Tissue & cell","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0040816624002155/pdfft?md5=ba72ec5501f3a54d013a172ca29ed76d&pid=1-s2.0-S0040816624002155-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141914107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tissue & cellPub Date : 2024-08-06DOI: 10.1016/j.tice.2024.102501
Muzaffer Katar , Fikret Gevrek
{"title":"Relation of the intense physical exercise and asprosin concentrations in type 2 diabetic rats","authors":"Muzaffer Katar , Fikret Gevrek","doi":"10.1016/j.tice.2024.102501","DOIUrl":"10.1016/j.tice.2024.102501","url":null,"abstract":"<div><h3>Aim</h3><p>Asprosin, a protein hormone, is released by unilocular adipocytes in reaction to low blood sugar. We aimed to examine how exercise affects asprosin hormone levels and associated organs, including the liver and pancreas, in diabetes.</p></div><div><h3>Methods</h3><p>Twenty-one male Wistar albino rats were firstly allocated into two main groups: control (n = 7) and diabetes (n = 14). Then, the diabetes group was further separated into two subgroups: sedentary (n = 7) and exercise (n = 7). The exercise group participated in a swimming training regimen (30 min/daily, six weeks). Serum levels of asprosin and various other biochemical parameters were evaluated through commercial ELISA kits. The liver was analyzed histopathologically, and pancreatic islet cells were examined for Cas-3 immune expression.</p></div><div><h3>Results</h3><p>Asprosin and total oxidant status decreased significantly in the exercise diabetic subgroup (p < 0.05). Glucose, insulin, creatinine, IL-6, and HomaIR concentrations decreased slightly with exercise (p > 0.05). Liver tissue injury scores and Cas-3 immune expression in pancreas islet cells decreased in exercise diabetic rats.</p></div><div><h3>Conclusions</h3><p>Reducing asprosin may lower glucose, insulin, and HOMA-IR. Physical activity decreases asprosin and total oxidative status, fostering anti-apoptosis and tissue healing in diabetes, potentially enhancing health. Monitoring asprosin levels offers insights into diabetes progression. Our findings imply that asprosin can be a therapeutic target for diabetes.</p></div>","PeriodicalId":23201,"journal":{"name":"Tissue & cell","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141985428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tissue & cellPub Date : 2024-08-05DOI: 10.1016/j.tice.2024.102511
Juan Manuel Herrera , Paula Viviani , María Victoria Miró , Adrián Luis Lifschitz , Guillermo León Virkel
{"title":"Rapid method for paraffin embedding of precision-cut liver slices","authors":"Juan Manuel Herrera , Paula Viviani , María Victoria Miró , Adrián Luis Lifschitz , Guillermo León Virkel","doi":"10.1016/j.tice.2024.102511","DOIUrl":"10.1016/j.tice.2024.102511","url":null,"abstract":"<div><p>Precision-cut liver slices (PCLS) are tissue explants extensively used as an <em>ex vivo</em> model for metabolism and toxicity studies. When <em>in vitro</em> assays are conducted, it is imperative to perform a histomorphological evaluation as part of the viability analyses throughout the assay time. It is considered that good quality PCLS histological sections are difficult to obtain because they are hard to manipulate, and may shrink or fold during processing. Moreover, bibliography is not detailed on the embedding processes used. In this article, we propose an adjusted and rapid method for paraffin embedding of PCLS from crossbreed steers. Each PCLS was covered with a piece of gauze and placed into a histological cassette. These cassettes were submitted to a series of baths: 80 % ethanol for 10 min; 3 baths of 96 % ethanol for 10 min; 3 baths of butanol for 10 min; 1 bath of butanol-paraffin (1:1) for 20 min in a 60 °C laboratory oven; and 3 baths of paraffin for 20 min in a 60 °C laboratory oven. Folded paper boxes were used to produce paraffin blocks. It was possible to obtain complete sections with preserved cell morphology and no artifacts, and tissue appearance was similar to previous PCLS processed through the routine protocol, demonstrating the adequacy of the method implemented.</p></div>","PeriodicalId":23201,"journal":{"name":"Tissue & cell","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141979463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"N-acetylcysteine combined with insulin therapy can reduce myocardial injury induced by type 1 diabetes through the endoplasmic reticulum pathway","authors":"Haitong Wu, Haihua Huo, Haoye Li, Hongyan Zhang, Xinrun Li, Qingyue Han, Jianzhao Liao, Zhaoxin Tang, Jianying Guo","doi":"10.1016/j.tice.2024.102515","DOIUrl":"10.1016/j.tice.2024.102515","url":null,"abstract":"<div><p>With the development of Type 1 diabetes mellitus (T1DM), various complications can be caused. Hyperglycemia affects the microenvironment of cardiomyocytes, changes endoplasmic reticulum homeostasis, triggers unfolding protein response and eventually promotes myocardial apoptosis. However, insulin therapy alone cannot effectively combat the complications caused by T1DM. Forty adult beagles were randomly divided into five groups: control group, diabetes mellitus group, insulin group, insulin combined with NAC group, and NAC group. 24-hour blood glucose, 120-day blood glucose, 120-day body weight, and serum FMN content were observed, furthermore, hematoxylin-eosin staining, Periodic acid Schiff reagent staining, and Sirius red staining of the myocardium were evaluated. The protein expressions of GRP78, ATF6, IRE1, PERK, JNK, CHOP, caspase 3, Bcl2, and Bax were detected. Results of the pathological section of myocardial tissue indicated that insulin combined with NAC therapy could improve myocardial pathological injury and glycogen deposition. Additionally, insulin combined with NAC therapy down-regulates the expression of GRP78, ATF6, IRE1, PERK, JNK, CHOP, caspase3, and Bax. These findings suggest that NAC has a phylactic effect on myocardial injury in beagles with T1DM, and the mechanism may be related to the improvement of endoplasmic reticulum stress-induced apoptosis.</p></div>","PeriodicalId":23201,"journal":{"name":"Tissue & cell","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141985537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tissue & cellPub Date : 2024-08-03DOI: 10.1016/j.tice.2024.102516
Miriana d’Alessandro , Edoardo Conticini , Laura Bergantini , Maria Antonietta Mazzei , Francesca Bellisai , Enrico Selvi , Paolo Cameli , Bruno Frediani , Elena Bargagli
{"title":"Krebs von den Lungen-6 as biomarker of the new progressive fibrotic phenotype of interstitial lung disease","authors":"Miriana d’Alessandro , Edoardo Conticini , Laura Bergantini , Maria Antonietta Mazzei , Francesca Bellisai , Enrico Selvi , Paolo Cameli , Bruno Frediani , Elena Bargagli","doi":"10.1016/j.tice.2024.102516","DOIUrl":"10.1016/j.tice.2024.102516","url":null,"abstract":"<div><h3>Background</h3><p>Novel progressive fibrotic phenotype has recently been proposed characterized by progressive and inexorable worsening of the disease. Krebs von den Lungen-6 (KL-6) has been proposed as fibrotic-ILD biomarker. We aimed to assess the role of KL-6 in fibrotic-ILD and the progressive phenotype in accordance with serial serum KL-6. Methods: 107 patients were enrolled in the study (median age,IQR, 65(54−71)y/o) followed at respiratory diseases and rheumatology units of University of Siena. Thirty-five had diagnoses of IPF, 18 sarcoidosis, 10 PLCH, 5 LAM, 24 fibrotic HP(fHP), 13 RA (4/13 RA-ILD) and 22 SSc (18/22 SSc-ILD). Serial serum samples were collected before therapy (t0) and 24 months later (t1) from IPF, SSc- and RA-ILD patients. Twenty-two healthy controls (HC) were enrolled. Serum samples were assayed for KL-6 concentrations (Fujirebio Europe, Gent, Belgium). Results: Higher KL-6 concentrations were reported in IPF, fHP and SSc-ILD patients than HC (p<0.0001). KL-6 cut-off value of 885 U/mL identified fibrotic-ILD patients. Logistic regression analysis indicated KL-6 (p=0.004) and smoking-habit (p=0.005) affected the ILD diagnosis. The decision tree model showed KL-6>1145 U/mL, DLco≤60.15 %, FVC≤86 % to classify 86 % IPF patients. Inverse correlation between T0-KL-6 and T1-FVC%(r=-0.314, p=0.046) and T1-DLco%(r=-0.327, p=0.038) in the progressive group. Conclusion: KL-6 proved to be a reliable marker for diagnosis and prognosis of fibrotic ILD patients with predictive value in progressive fibrotic patients and a useful marker to identify the new and similar progressive phenotype of IPF and SSc-ILD patients assessing the functional progression in accordance with serial serum KL-6 measurements.</p></div>","PeriodicalId":23201,"journal":{"name":"Tissue & cell","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0040816624002179/pdfft?md5=cbad59d546df4b5c0c218eebe6b36be8&pid=1-s2.0-S0040816624002179-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141976705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}