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  • Open Access

    ARTICLE

    In vitro effects of 2-methoxyestradiol-bis-sulphamate on cell growth, morphology and cell cycle dynamics in the MCF-7 breast adenocarcinoma cell line

    CHRIS VORSTER, ANNIE JOUBERT

    BIOCELL, Vol.34, No.2, pp. 71-80, 2010, DOI:10.32604/biocell.2010.34.071

    Abstract In the search for new and improved anticancer therapies, researchers have identified several potentially useful compounds. One of these agents is 2-methoxyestradiol-bis-sulphamate (2ME-BM), a sulphamoylated derivative of 2-methoxyestradiol. The objective of this study was to evaluate 2ME-BM’s in vitro efficacy as antiproliferative agent in the MCF-7 breast adenocarcinoma cell line. Light- and fluorescent microscopy showed decreased cell density, increased apoptotic characteristics and significant ultrastructural aberrations indicative of autophagic cell death after 24 hours of exposure at a concentration of 0.4μM. In addition, mitotic indices revealed that 2ME-BM induces a G2M block. The latter was confirmed by flow cytometric analyses where… More >

  • Open Access

    ARTICLE

    Cysteine proteinases of Trypanosoma cruzi: from digestive enzymes to programmed cell death mediators

    GREGOR KOSEC, VANINA ALVAREZ**¶, JUAN J. CAZZULO**

    BIOCELL, Vol.30, No.3, pp. 479-490, 2006, DOI:10.32604/biocell.2006.30.479

    Abstract Trypanosoma cruzi, the parasite causing Chagas disease, contains a number of proteolytic enzymes. The recent completion of the genome sequence of the T. cruzi CL Brener clone suggests the presence of 70 cysteine peptidases, 40 serine peptidases (none of them from the chymotrypsin family), about 250 metallopeptidases (most leishmanolysin homologues), 25 threonine peptidases, and only two aspartyl peptidases, none of them from the pepsin family. The cysteine peptidases belong to 7 families of Clan CA, 3 families of Clan CD, and one each of Clans CE and CF. In Clan CA, the C1 family is represented by cruzipains 1 and… More >

  • Open Access

    ARTICLE

    The uptake of cadmium by Allium cepa var. agrogarum L. and its effects on chromosome and nucleolar behavior in root tip cells

    Wang QL, DH Liu, JY Yue

    Phyton-International Journal of Experimental Botany, Vol.85, pp. 155-161, 2016, DOI:10.32604/phyton.2016.85.155

    Abstract Allium cepa var. agrogarum L. seedlings are sensitive to Cd stress. We used fluorescence imaging to indicate that Cd2+ was localized in cytoplasm in the epidermis of the basal parts of root and vascular tissues after Cd treatment. The nucleoli and the cell walls were the first storage sites of Cd2+. When Cd exposure was prolonged, severe irregularly-shaped nuclei were induced. We used silver nitrate staining to analyze the effects of different concentrations (1–300 μM) of cadmium chloride on chromosome, nucleolus and nucleolus organizer regions (NORs) in root tip cells. Cd2+ induced c-mitosis, chromosome bridges, chromosome stickiness and micronuclei. More… More >

  • Open Access

    ARTICLE

    Autophagy, apoptosis and organelle features during cell exposure to cadmiumč

    Cristiane Dos Santos VERGILIO, Edésio José Tenório De MELO*

    BIOCELL, Vol.37, No.2, pp. 45-54, 2013, DOI:10.32604/biocell.2013.37.045

    Abstract Cadmium (Cd) induces several effects in different tissues, but our knowledge of the toxic effects on organelles is insufficient. To observe the progression of Cd effects on organelle structure and function, HuH-7 cells (human hepatic carcinoma cell line) were exposed to CdCl2 in increasing concentrations (1 μM – 20 μM) and exposure times (2 h – 24 h). During Cd treatment, the cells exhibited a progressive decrease in viability that was both time- and dose-dependent. Cd treated cells displayed progressive morphological changes that included cytoplasm retraction and nuclear condensation preceding a total loss of cell adhesion. Treatment with 10 μM… More >

  • Open Access

    ABSTRACT

    The Role of Autophagy in the Differentiation of EPCs Induced by Shear Stress

    Xiumei Guan1, Hong Li1, Xin Li1, Xiaoyun Zhang1, Xiaodong Cui1, Hong Yan1, Yuzhen Wang2, Shunmei Liu2, Min Cheng3,*

    Molecular & Cellular Biomechanics, Vol.16, Suppl.1, pp. 91-91, 2019, DOI:10.32604/mcb.2019.05755

    Abstract Aims: Endothelial progenitor cells (EPCs) play an important role in postnatal angiogenesis and neovascularization. Previous studies have revealed shear stress could accelerate EPC proliferation, differentiation, migration and so on, which contribute to postnatal angiogenesis and neovascularization. Moreover, some studies indicate that autophagy actively participates angiogenesis by affecting EPC migration and differentiation. Here, we try to elucidate the possible roles of autophagy of EPC differentiation induced by shear stress. Methods and Results: EPCs were exposed to shear stress (12 dyne/cm2). And then the expression of autophagy markers, such as LC3Ⅱ/Ⅰ, P62andATG5, were analyzed using Western blot. The results have shown that… More >

  • Open Access

    ARTICLE

    Tubulointerstitial injury and proximal tubule albumin transport in early diabetic nephropathy induced by type 1 diabetes mellitus

    Maximiliano GIRAUD-BILLOUD1, 2*, Fernando EZQUER2, Javiera BAHAMONDE2, Marcelo EZQUER2

    BIOCELL, Vol.41, No.1, pp. 1-12, 2017, DOI:10.32604/biocell.2017.41.001

    Abstract A decrease in the tubular expression of albumin endocytic transporters megalin and cubilin has been associated with diabetic nephropathy, but there are no comprehensive studies to date relating early tubulointerstitial injury and the effect of the disease on both transporters in type 1 diabetes mellitus (T1DM). We used eight-weekold male C57BL/6 mice divided into two groups; one of them received the vehicle (control group), while the other received the vehicle + 200 mg/kg streptozotocin (T1DM). Ten weeks after the injection, we evaluated plasma insulin, enzymuria, urinary vitamin D-binding protein (VDBP), tubulointerstitial fibrosis and proximal tubule histology, markers of autophagy, and… More >

  • Open Access

    REVIEW

    Microglia-precursor cell interactions in health and in pathology

    Estela M. MUÑOZ

    BIOCELL, Vol.42, No.2, pp. 41-46, 2018, DOI:10.32604/biocell.2018.07011

    Abstract Until recently, microglia were mainly known as the resident phagocytes of the brain, i.e. the ‘immunological warriors’ of the brain. However, extensive knowledge is being accumulated about the functions of microglia beyond immunity. Nowadays, it is well accepted that microglial cells are highly dynamic and responsive, and that they intervene in a dual manner in many developmental processes that shape the central nervous system, including neurogenesis, gliogenesis, spatial patterning, synaptic formation and elimination, and neural circuit establishment and maturation. The differentiation and the pool of precursor cells were also shown to be under microglia regulation via bidirectional communication. In this… More >

  • Open Access

    ARTICLE

    Diabetic nephropathy, autophagy and proximal tubule protein endocytic transport: A potentially harmful relationship

    Maximiliano GIRAUD-BILLOUD1,2,*, Claudio M. FADER1,3, Rocío AGÜERO2, Fernando EZQUER4, Marcelo EZQUER4

    BIOCELL, Vol.42, No.2, pp. 35-40, 2018, DOI:10.32604/biocell.2018.07010

    Abstract Diabetic nephropathy (DN) is the most frequent cause of chronic renal failure. Until now, the pathophysiological mechanisms that determine its development and progression have not yet been elucidated. In the present study, we evaluate the role of autophagy at early stages of DN, induced in type 2 diabetes mellitus (T2DM) mouse, and its association with proximal tubule membrane endocytic receptors, megalin and cubilin. In T2DM animals we observed a tubule-interstitial injury with significantly increased levels of urinary GGT and ALP, but an absence of tubulointerstitial fibrosis. Kidney proximal tubule cells of T2DM animals showed autophagic vesicles larger than those observed… More >

  • Open Access

    ARTICLE

    Platelet rich plasma (PRP) induces autophagy in osteoblast precursor 3T3-L1

    Sergio Andrés CARMINATI1,2, María Carolina BARBOSA2, Claudio Marcelo FADER1,2*

    BIOCELL, Vol.42, No.1, pp. 13-16, 2018, DOI:10.32604/biocell.2018.07008

    Abstract Autophagy is an essential cellular homeostatic mechanism by which intracellular components are delivered into the lysosomes for degradation and recycling. Autophagy has been related with a diversity of pathological or physiological dentary processes such as bone remodeling, skeletal aging, osteoclastogenesis, osteoblastogenesis and different types of oral cancer. Platelet-rich plasma (PRP), isolated from autologous blood, is a plasma preparation containing a higher concentration of platelets which contains numerous different growth factors and cytokines that activate several cellular signaling cascades. The purpose of this study is to investigate the effect of PRP on autophagy stimulation in both osteoblast precursor 3T3-L1 and non-related… More >

  • Open Access

    REVIEW

    The antitumor effects of Newcastle disease virus on glioma

    Ji SHI; Peixin SUN, Ye ZHANG, Bing YAO, Haozhe PIAO

    BIOCELL, Vol.43, No.3, pp. 119-128, 2019, DOI:10.32604/biocell.2019.07577

    Abstract Glioma is the most common primary malignant brain tumor with a poor survival rate. In recent years, no significant progress has been made in the treatment of gliomas in contrast to the development of improved diagnosis via molecular typing. Newcastle disease virus (NDV), a negative-stranded RNA virus that exhibits oncolytic activity, has been investigated for its capacity to elicit antitumor activity in many types of cancers, including glioma. Therefore, application of oncolytic viruses, such as NDV, as a new treatment strategy to specifically target aberrant signaling in glioblastomas has brought new hope. For many years, NDV has been investigated for… More >

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