Acta histochemica最新文献

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Spatiotemporal distribution of Wnt signaling pathway markers in human congenital anomalies of kidney and urinary tract Wnt信号通路标志物在人先天性肾、尿路异常中的时空分布
IF 2.3 4区 生物学
Acta histochemica Pub Date : 2025-02-04 DOI: 10.1016/j.acthis.2025.152235
Ilija Perutina , Nela Kelam , Mirko Maglica , Anita Racetin , Azer Rizikalo , Natalija Filipović , Ivana Kuzmić Prusac , Marko Bošnjak , Josip Mišković , Boris Kablar , Nasrollah Ghahrani , Katarina Vukojević
{"title":"Spatiotemporal distribution of Wnt signaling pathway markers in human congenital anomalies of kidney and urinary tract","authors":"Ilija Perutina ,&nbsp;Nela Kelam ,&nbsp;Mirko Maglica ,&nbsp;Anita Racetin ,&nbsp;Azer Rizikalo ,&nbsp;Natalija Filipović ,&nbsp;Ivana Kuzmić Prusac ,&nbsp;Marko Bošnjak ,&nbsp;Josip Mišković ,&nbsp;Boris Kablar ,&nbsp;Nasrollah Ghahrani ,&nbsp;Katarina Vukojević","doi":"10.1016/j.acthis.2025.152235","DOIUrl":"10.1016/j.acthis.2025.152235","url":null,"abstract":"<div><div>This study aimed to investigate the spatiotemporal expression patterns of key markers involved in regulating the canonical and non-canonical Wnt pathway during human fetal kidney development, comparing healthy (CTRL) and congenital anomalies of the kidney and urinary tract (CAKUT) affected kidneys. Human fetal kidneys, ranging from the 18th to the 38th developmental weeks, including various CAKUT phenotypes (horseshoe, dysplastic, duplex and hypoplastic), underwent double immunofluorescence microscopy analysis following antibody staining. Immunoreactivity levels were quantified in different kidney structures, and expression dynamics were assessed using linear and nonlinear regression modeling techniques. The study revealed a decrease in the overall protein expression of acetylated α-tubulin during normal kidney development, while the highest percentage of positive cells was observed in the horseshoe kidney (HK), thus disturbing microtubule composition in normal cell division and differentiation. Additionally, a continuous decrease of inversin-positive cells in hypoplastic (HYP) and duplex kidneys (UD), but the exponential growth of DVL-1 expression score in dysplastic kidneys (DYS) with developmental age, result in suppression of final kidney differentiation by continuous canonical Wnt signaling activation, thus supporting the essential role of the switch from canonical to non-canonical Wnt pathway in nephrogenesis. Furthermore β-catenin-positive cells in dysplastic and hypoplastic kidney exhibited the highest percentage of positive signal, with a decline in β-catenin positive cells over time in the control group, indicating disturbances in transition from canonical to non-canonical Wnt pathway in CAKUT-affected kidneys. The findings suggest that the crosstalk between canonical and non-canonical Wnt signaling pathways is crucial for normal nephrogenesis, highlighting their potential roles in normal and dysfunctional kidney development.</div></div>","PeriodicalId":6961,"journal":{"name":"Acta histochemica","volume":"127 1","pages":"Article 152235"},"PeriodicalIF":2.3,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132647","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}
引用次数: 0
3D examination reveals increased destruction of alpha-actin-positive structures in advanced follicular lymphoma stages 3D检查显示在晚期滤泡性淋巴瘤阶段α -肌动蛋白阳性结构的破坏增加。
IF 2.3 4区 生物学
Acta histochemica Pub Date : 2025-01-29 DOI: 10.1016/j.acthis.2025.152232
Katharina Geib , Sonja Scharf , Hendrik Schäfer , Sylvia Hartmann , Martin-Leo Hansmann , Patrick Wurzel
{"title":"3D examination reveals increased destruction of alpha-actin-positive structures in advanced follicular lymphoma stages","authors":"Katharina Geib ,&nbsp;Sonja Scharf ,&nbsp;Hendrik Schäfer ,&nbsp;Sylvia Hartmann ,&nbsp;Martin-Leo Hansmann ,&nbsp;Patrick Wurzel","doi":"10.1016/j.acthis.2025.152232","DOIUrl":"10.1016/j.acthis.2025.152232","url":null,"abstract":"<div><div>Follicular lymphoma (FL) represents the most prevalent subtype of non-Hodgkin’s-lymphoma in Western Europe and the United States. While the examination of two-dimensional histological slides remains the gold standard method for diagnosing FL stages, three-dimensional analysis provides additional insights, particularly regarding cellular morphology, spatial relationships and network connectivity. This investigation assessed the tumor-related morphological destruction of fibroreticular cell (FRC) networks bordering germinal centres in FL. A confocal laser scanning technology and a digital three-dimensional analysis system were used. Quantitive measurements included the length of fibroblastic reticular walls surrounding the germinal centres as well as the size of the gaps and holes within these structures. Three-dimensional analysis revealed progressive structural degradation and a reduction in mechanical barrier integrity, with differences observed between low- and high-grade FL. High-grade FL exhibited greater network destruction. Fibroblastic reticular cell networks’ wall length demonstrated a consistent decline across all grades. The lengths of these walls and wall-like structures in FL grades 1 or 2 were similar to reactive germinal centres seen in lymphadenitis, as well as the gap size. The gaps are thought to be responsible for B- and T-cell exchange. This work demonstrated the massive destruction of neoplastic germinal centres in grades 3a and 3b FL. In grade 3b, this was accompanied by a likely dysfunctional mechanical border of the germinal centre and the near-complete loss of structural integrity. Under physiological conditions, gaps and holes regulate lymphoid traffic. Under reactive conditions, only a few specific T-cells can access the germinal centre. Under neoplastic conditions, the diameter of these gaps increases as grades increase, culminating in complete structural disruption in grade 3b. The mechanical destruction was found to begin at one pole of the germinal centre, as evidenced by localized decay and fragmentation of FRC walls on one side. Fibroblastic reticular cell networks are critical for maintaining chemokine gradients to ensure compartmentalisation of lymphoid structures. Their ongoing degradation in FL of the networks leads to a morphological loss of function. This is due to the blurring of various lymph node zones.</div></div>","PeriodicalId":6961,"journal":{"name":"Acta histochemica","volume":"127 1","pages":"Article 152232"},"PeriodicalIF":2.3,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143063085","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}
引用次数: 0
New insights into persistent corneal subepithelial infiltrates following epidemic keratoconjunctivitis: The first case report with ultrastructural and immunohistochemical investigations 对流行性角膜结膜炎后持续性角膜上皮下浸润的新认识:首例超微结构和免疫组织化学调查报告。
IF 2.3 4区 生物学
Acta histochemica Pub Date : 2025-01-27 DOI: 10.1016/j.acthis.2025.152231
Rita Mencucci , Michela Cennamo , Irene Rosa , Daniele Guasti , Matilde Buzzi , Eleonora Sgambati , Mirca Marini , Mirko Manetti
{"title":"New insights into persistent corneal subepithelial infiltrates following epidemic keratoconjunctivitis: The first case report with ultrastructural and immunohistochemical investigations","authors":"Rita Mencucci ,&nbsp;Michela Cennamo ,&nbsp;Irene Rosa ,&nbsp;Daniele Guasti ,&nbsp;Matilde Buzzi ,&nbsp;Eleonora Sgambati ,&nbsp;Mirca Marini ,&nbsp;Mirko Manetti","doi":"10.1016/j.acthis.2025.152231","DOIUrl":"10.1016/j.acthis.2025.152231","url":null,"abstract":"<div><div>Epidemic keratoconjunctivitis (EKC) is one of the most severe clinical manifestations of human adenovirus ocular surface infection, which may lead to the formation of subepithelial infiltrates (SEIs) in the anterior corneal stroma in 20–50 % of cases. SEIs may be asymptomatic or give rise to corneal aberrations and visual impairment for months or years after acute infection, despite treatments. Here, we describe the ultrastructural and immunophenotypic features of the anterior corneal stroma of a patient who underwent superficial anterior lamellar keratoplasty (SALK) surgery to remove corneal opacities related to clinically significant and steroid-unresponsive, long-lasting SEIs after adenoviral EKC. Before femtosecond laser-assisted SALK surgical intervention, the patient underwent in vivo confocal microscopy that showed a cluster of hyperreflective inflammatory cells within the basal epithelium, associated to an abnormal sub-basal nerve plexus with a fragmented nervous component appearance. The areas corresponding to the SEIs appeared as roundish hyperreflective spots with undefined borders. Transmission electron microscopy analysis of the excised anterior corneal button revealed the presence of giant stromal cells displaying myofibroblast-like features immediately beneath the Bowman’s layer. Such abnormal cells exhibited ultrastructural signs of endoplasmic reticulum stress and autophagy, and were positive for markers of activated fibroblasts/myofibroblasts at immunofluorescence analysis. The deeper stroma was instead populated by normal stromal cells (i.e., keratocytes). This case report provides the first morphological evidence that persistent SEIs could be the macroscopic expression of subepithelial giant stromal cells with myofibroblast-like characteristics. Such a novel observation might pave the way toward a better targeted therapeutic management of SEIs.</div></div>","PeriodicalId":6961,"journal":{"name":"Acta histochemica","volume":"127 1","pages":"Article 152231"},"PeriodicalIF":2.3,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143057765","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}
引用次数: 0
Normal dermal mesenchymal stem cells improve the functions of psoriatic keratinocytes by inducing autophagy 正常真皮间充质干细胞通过诱导自噬改善银屑病角质形成细胞的功能。
IF 2.3 4区 生物学
Acta histochemica Pub Date : 2025-01-25 DOI: 10.1016/j.acthis.2025.152229
Nannan Liang, Yue Cao, Junqin Li, Kaiming Zhang
{"title":"Normal dermal mesenchymal stem cells improve the functions of psoriatic keratinocytes by inducing autophagy","authors":"Nannan Liang,&nbsp;Yue Cao,&nbsp;Junqin Li,&nbsp;Kaiming Zhang","doi":"10.1016/j.acthis.2025.152229","DOIUrl":"10.1016/j.acthis.2025.152229","url":null,"abstract":"<div><h3>Objective</h3><div>Psoriasis is a chronic inflammatory skin disease characterized by excessive proliferation and abnormal differentiation of keratinocytes. Although stem cell-based therapies have shown promise in treating psoriasis, the underlying mechanisms remain unclear. This study aimed to established a psoriatic cell model to investigate the effect of normal dermal mesenchymal stem cell (DMSCs) on keratinocyte proliferation, inflammation responses and the associated mechanism.</div></div><div><h3>Methods</h3><div>To create an <em>in vitro</em> model of psoriasis, HaCaT cells were stimulated with a mixture of five inflammatory cytokines including IL-17A, IL-22, oncostatin M, IL-1α, and TNF-α (M5). A transwell co-culture system was employed to assess the influence of normal DMSCs on proliferation and inflammation response of HaCaT cells. Cell viability was assessed using the CCK-8 assay and EDU incorporation assay. The expression levels of mRNA for inflammatory cytokines (IL-8, IL-17A and TNF-α) in HaCaT cells co-cultured with either normal or psoriatic DMSCs were quantified by qRT-PCR. Apoptosis was evaluated by annexin V-FITC/PI double staining and TUNEL/DAPI staining assay. Autophagy was detected by immunostaining, RT-PCR and western blotting. Additionally, the expression levels of mRNA and protein of both Akt and mammalin target of rapamycin(mTOR) were also determined.</div></div><div><h3>Results</h3><div>Normal DMSCs were found to decrease the viability and promote apoptosis of HaCaT cells treated with M5. Furthermore, DMSCs reduced the secretion of proinflammatory cytokines, such as IL-8, IL-17A and TNF-α. Importantly, normal DMSCs were shown to induced autophagy in HaCaT cell. Pretreatment of HaCaT cells with autophagy inhibitor 3-methyladenine (3-MA) reversed the anti-psoriatic effect of normal DMSCs. Notably, DMSCs promote autophagy in M5-treated HaCaT cells by inhibition of p-Akt/Akt and p-mTOR/mTOR ratio.</div></div><div><h3>Conclusion</h3><div>Normal mesenchymal stem cells promote autophagy through the inhibition of Akt/mTOR signaling pathway, leading to the alleviation of psoriasis in vitro. These findings provide insights into the potential mechanisms by which DMSCs may exert therapeutic effects in psoriasis and support further investigation into their clinical applications.</div></div>","PeriodicalId":6961,"journal":{"name":"Acta histochemica","volume":"127 1","pages":"Article 152229"},"PeriodicalIF":2.3,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143045266","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}
引用次数: 0
Introducing the “hypotheses in cell biology” section 介绍“细胞生物学假说”部分
IF 2.3 4区 生物学
Acta histochemica Pub Date : 2025-01-21 DOI: 10.1016/j.acthis.2024.152227
Jesus Espada
{"title":"Introducing the “hypotheses in cell biology” section","authors":"Jesus Espada","doi":"10.1016/j.acthis.2024.152227","DOIUrl":"10.1016/j.acthis.2024.152227","url":null,"abstract":"","PeriodicalId":6961,"journal":{"name":"Acta histochemica","volume":"127 1","pages":"Article 152227"},"PeriodicalIF":2.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143478902","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}
引用次数: 0
SOX2 promotes the glycolysis process to accelerate cervical cancer progression by regulating the expression of HK2 SOX2通过调节HK2的表达促进糖酵解过程,从而加速宫颈癌的进展。
IF 2.3 4区 生物学
Acta histochemica Pub Date : 2025-01-16 DOI: 10.1016/j.acthis.2025.152230
Ting Wang, Ruoan Jiang, Xueling Tang, Yingsha Yao, Peiyue Jiang
{"title":"SOX2 promotes the glycolysis process to accelerate cervical cancer progression by regulating the expression of HK2","authors":"Ting Wang,&nbsp;Ruoan Jiang,&nbsp;Xueling Tang,&nbsp;Yingsha Yao,&nbsp;Peiyue Jiang","doi":"10.1016/j.acthis.2025.152230","DOIUrl":"10.1016/j.acthis.2025.152230","url":null,"abstract":"<div><h3>Background</h3><div>Cervical cancer is a major health burden in females worldwide, available studies indicated that sex-determining region Y-box 2 (SOX2) is closely related to the malignant phenotypes of multiple cancers including cervical cancer. However, the underlying mechanisms were blurred.</div></div><div><h3>Experimental Procedures</h3><div>A bioinformatics analysis was conducted to investigate the clinical correlation between SOX2 and cervical cancer. Transient transfection and lentivirus infection were utilized to achieve overexpression and knockdown of SOX2, respectively. The role of SOX2 in cervical cancer was confirmed by transwell and colony-forming assays. Immunoblot, dual-luciferase reporter, chromatin immunoprecipitation (ChIP), and biochemical experiments were employed. In addition, the xenograft models and immunohistochemistry (IHC) experiments were performed to validate the findings <em>in vivo</em>.</div></div><div><h3>Results</h3><div>The expression of SOX2 was significantly positively associated with the cell migration, invasion, and colony-forming abilities of cervical cancer cells. The following immunoblots revealed that the SOX2-induced malignant phenotypes might be related to the glycolysis process, since overexpressing SOX2 significantly promoted the hexokinase 2 (HK2) and glucose transporter-1 (GLUT1) expression, and increased the content of glucose and lactic acid. The further dual-luciferase reporter and ChIP experiments confirmed a binding relationship between SOX2 and HK2 promoter. More importantly, overexpressing SOX2 promoted tumor growth concomitant with a hyper-expression of HK2 and GLUT1 in xenograft tumor tissues, yet the treatment of glycolysis inhibitor significantly reversed those outcomes.</div></div><div><h3>Conclusion</h3><div>SOX2 promotes the malignant progression of cervical cancer by facilitating glycolysis.</div></div>","PeriodicalId":6961,"journal":{"name":"Acta histochemica","volume":"127 1","pages":"Article 152230"},"PeriodicalIF":2.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142998285","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}
引用次数: 0
Prebiotic RNA self-assembling and the origin of life: Mechanistic and molecular modeling rationale for explaining the prebiotic origin and replication of RNA 益生元RNA自组装和生命起源:解释RNA起源和复制的机制和分子模型原理。
IF 2.3 4区 生物学
Acta histochemica Pub Date : 2025-01-08 DOI: 10.1016/j.acthis.2024.152226
Juan C. Stockert , Richard W. Horobin
{"title":"Prebiotic RNA self-assembling and the origin of life: Mechanistic and molecular modeling rationale for explaining the prebiotic origin and replication of RNA","authors":"Juan C. Stockert ,&nbsp;Richard W. Horobin","doi":"10.1016/j.acthis.2024.152226","DOIUrl":"10.1016/j.acthis.2024.152226","url":null,"abstract":"<div><div>In recent years, a great interest has been focused on the prebiotic origin of nucleic acids and life on Earth. An attractive idea is that life was initially based on an autocatalytic and autoreplicative RNA (the RNA-world). RNA duplexes are right-handed helical chains with antiparallel orientation, but the rationale for these features is not yet known. An antiparallel (inverted) stacking of purine nucleosides was reported in crystallographic studies. Molecular modeling also supports the inverted orientation of nucleosides. This preferential stacking can also appear when nucleosides are included in a montmorillonite clay matrix. Free-energy values and geometrical parameters show that <span>D</span>-ribose chirality is preferred for the formation of right-handed RNA molecules. Thus, a “zipper” model with antiparallel and auto-intercalated nucleosides linked by phosphate groups can be proposed to form single RNA chains. Unstacking with strand separation and base pairing by H-bonding, results in shortening and inclination of ribose-phosphate chains, leading to right-handed helicity and antiparallel duplexes. Incorporation of complementary precursors on the major groove template by a self-assembly mechanism provides a prebiotic (non-enzymatic) “tetris” replication model by formation of a transient RNA tetrad and tetraplex. Original hairpin motifs appear as simple building units that form typical RNA structures such as hammerheads, cloverleaves and dumbbells. They occur today in the circular viroids and virusoids, as well as in highly branched and complex rRNA molecules.</div></div>","PeriodicalId":6961,"journal":{"name":"Acta histochemica","volume":"127 1","pages":"Article 152226"},"PeriodicalIF":2.3,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142942444","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}
引用次数: 0
Angiopoietins/Tie2 signaling axis and its role in angiogenesis of psoriasis 血管生成素/Tie2信号轴及其在银屑病血管生成中的作用。
IF 2.3 4区 生物学
Acta histochemica Pub Date : 2025-01-02 DOI: 10.1016/j.acthis.2024.152228
Jiao Li, Hui Hou, Junqin Li, Kaiming Zhang
{"title":"Angiopoietins/Tie2 signaling axis and its role in angiogenesis of psoriasis","authors":"Jiao Li,&nbsp;Hui Hou,&nbsp;Junqin Li,&nbsp;Kaiming Zhang","doi":"10.1016/j.acthis.2024.152228","DOIUrl":"10.1016/j.acthis.2024.152228","url":null,"abstract":"<div><div>Hyperplasia of microvessels in the superficial dermis is the main pathological feature of psoriasis, and is linked to the pathogenesis of psoriasis. Thus, anti-angiogenic therapy may be effective for psoriasis. Angiopoietins (Angs) are crucial angiogenic factors. Ang1 supports a static mature vascular phenotype, while Ang2 is associated with the formation of abnormal vascular structure, vascular leakage and inflammation. The Ang/Tie2 axis and its signal transduction play an important role in regulation of vascular stability, angiogenesis and inflammation. Targeting the Ang/Tie2 signal axis can normalize microvessels in psoriatic lesions. This paper reviews Ang/Tie2 signal axis and its role in angiogenesis of psoriasis, aiming to provide new ideas and strategies for anti-angiogenic therapy of psoriasis.</div></div>","PeriodicalId":6961,"journal":{"name":"Acta histochemica","volume":"127 1","pages":"Article 152228"},"PeriodicalIF":2.3,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142926185","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}
引用次数: 0
Acridine orange fluorescence in chromosome cytochemistry: Molecular modeling rationale for understanding the differential fluorescence on double- and single-stranded nucleic acids 染色体细胞化学中的吖啶橙荧光:理解双链和单链核酸差异荧光的分子建模原理。
IF 2.3 4区 生物学
Acta histochemica Pub Date : 2024-12-21 DOI: 10.1016/j.acthis.2024.152225
Alfonso Blázquez-Castro , Juan C. Stockert
{"title":"Acridine orange fluorescence in chromosome cytochemistry: Molecular modeling rationale for understanding the differential fluorescence on double- and single-stranded nucleic acids","authors":"Alfonso Blázquez-Castro ,&nbsp;Juan C. Stockert","doi":"10.1016/j.acthis.2024.152225","DOIUrl":"10.1016/j.acthis.2024.152225","url":null,"abstract":"<div><div>Many fluorophores display interesting features that make them useful biological labels and dyes, particularly in Cell Biology and Cytogenetics. Changes in the absorption-emission spectra (ortho- and metachromasia) are accounted among them. Acridine orange (AO) is one of such fluorochromes with an exemplary orthochromatic <em>vs.</em> metachromatic emission, which depends on its concentration and binding mode to different cell substrates. Here, we revisit the differential AO fluorescence that occurs in selected biological materials, which allows the identification of single-stranded or double-stranded nucleic acids. Although known for a long time, the ultimate reason for this differential phenomenon has not been properly addressed. We propose a potential molecular mechanism that adequately accounts for the distinct AO emission when bound either to denatured or denatured-reassociated DNA. This mechanism, based on theoretical molecular modelling, implies a difference in the degree of overlap of excited state orbitals whenever AO molecules are interacting with bases from single- or double-stranded nucleic acids. In the first case, massive orbital overlapping leads to a metachromatic red AO emission. Otherwise, no excited-state orbital overlapping occurs, due to excessive distance between intercalated AO molecules, which manifests as orthochromatic green fluorescence. Our molecular modelling supports this interplay between orbital overlap/not overlap and metachromatic/orthochromatic fluorescence.</div></div>","PeriodicalId":6961,"journal":{"name":"Acta histochemica","volume":"127 1","pages":"Article 152225"},"PeriodicalIF":2.3,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875805","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}
引用次数: 0
Targeting TEAD would be a potential strategy for scarless wound repair: A preliminary study 针对TEAD可能是无疤痕伤口修复的潜在策略:一项初步研究。
IF 2.3 4区 生物学
Acta histochemica Pub Date : 2024-12-12 DOI: 10.1016/j.acthis.2024.152223
Ming-Yan Yang , Hong-Yuan Quan , Da-Lei Li , Jian Ruan , Hua-Ying Fan
{"title":"Targeting TEAD would be a potential strategy for scarless wound repair: A preliminary study","authors":"Ming-Yan Yang ,&nbsp;Hong-Yuan Quan ,&nbsp;Da-Lei Li ,&nbsp;Jian Ruan ,&nbsp;Hua-Ying Fan","doi":"10.1016/j.acthis.2024.152223","DOIUrl":"10.1016/j.acthis.2024.152223","url":null,"abstract":"<div><div>Despite of decades of efforts, novel approaches are still limited to attenuate or prevent skin scarring. A previous report published in <em>Science</em> demonstrated that inhibition of YAP promotes scarless wound repair by regeneration. Due to the difficult drugability of targeting YAP, we speculated that inhibition of TEAD, a partner molecule of YAP, might exist similar therapeutic potential. Therefore, the aim of the study was to evaluate therapeutical effect of a novel inhibitor of TEAD auto-palmitoylation, VT107, on scar formation in a cutaneous wound healing model. Our findings confirmed VT107 exhibited favorable effect on preventing scarring, manifesting as reducing fibroblast proliferation and collagen denaturation, decreasing TGF-β1 and collagen deposition, as well as connective tissue growth factor (CTGF) expression. These findings provide a novel insight for the development of anti-scarring strategies. TEAD would become an ideal target for the treatment of scars.</div></div>","PeriodicalId":6961,"journal":{"name":"Acta histochemica","volume":"127 1","pages":"Article 152223"},"PeriodicalIF":2.3,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142816992","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}
引用次数: 0
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