Distinct mechanism of action for antitumoral neutral cyclometalated Pt(II)-complexes bearing antifungal imidazolyl-based drugs.

Three neutral Pt(II) complexes containing 1-Methylimidazole and the antifungal imidazolyl drugs Clotrimazole and Bifonazole have been prepared. The general formula of the new derivatives is [Pt(κ-(C^N)Cl(L)], where C^N stands for ppy = 2-phenylpyridinate, and L = 1-Methylimidazole (MeIm) for [Pt-MeIm]; L = Clotrimazole (CTZ) for [Pt-CTZ] and L = Bifonazole (BFZ) for [Pt-BFZ]). The complexes have been completely characterized in solution and the crystal structures of [Pt-BFZ] and [Pt-CTZ] have been resolved.

Ultrasonic techniques to obtain dental pulp from impacted third molars.

Background: In the dental clinic impacted teeth are frequent findings, especially upper and lower third molars, leading to their exodontia. Among surgical techniques piezosurgery is advantageous for delicate structures in the oral cavity. Extracted teeth, usually discarded, have been revalued as biological material, providing living tissues with possible applications in regenerative dentistry.

Enhancing survival, engraftment, and osteogenic potential of mesenchymal stem cells.

Mesenchymal stem cells (MSCs) are promising candidates for bone regeneration therapies due to their plasticity and easiness of sourcing. MSC-based treatments are generally considered a safe procedure, however, the long-term results obtained up to now are far from satisfactory. The main causes of these therapeutic limitations are inefficient homing, engraftment, and osteogenic differentiation.

Dehydroleucodine inhibits tumor growth in a preclinical melanoma model by inducing cell cycle arrest, senescence and apoptosis.

Malignant melanoma represents the fastest growing public health risk of all cancer types worldwide. Several strategies and anti-cancer drugs have been used in an effort to improve treatments, but the development of resistance to anti-neoplastic drugs remains the major cause of chemotherapy failure in melanomas. Previously, we showed that the sesquiterpene lactone, dehydroleucodine (DhL), promotes the accumulation of DNA damage markers, such as H2AX and 53BP1, in human tumor cells.

Control of cell adhesion and migration by podocalyxin. Implication of Rac1 and Cdc42.

Podocalyxin (PODXL) is a type I membrane sialomucin, originally described in the epithelial cells (podocytes) of kidney glomeruli. PODXL is also found in extra-renal tissues and in certain aggressive tumors, but its precise pathophysiological role is unknown. Expression of PODXL in CHO cells enhances their adhesive, migratory and cell-cell interactive properties in a selectin and integrin-dependent manner.

[Study of Flexible Doses of Paliperidone ER in Pacients with Schizophrenia who Have Undergone Inefficient Treatment with other Antipsychotics].

Background: Extended-release (ER) paliperidone is an innovative atypical antipsychotic that allows minimal peak-to-through fluctuations with once-daily dosing.

Objective: To evaluate effectiveness, safety and tolerability of flexible, once-daily doses of paliperidone ER (3-12 mg/day) in patients with schizophrenia from Argentina and Colombia who had previously failed treatment with other antipsychotic agents.

Methods: The authors conducted a 6-month, open-label, prospective and multicentric study.

Peritubular myoid cells from rat seminiferous tubules contain actin and myosin filaments distributed in two independent layers.

In the mammalian testis, peritubular myoid cells (PM cells) surround the seminiferous tubules (STs), express cytoskeletal markers of true smooth muscle cells, and participate in the contraction of the ST. It has been claimed that PM cells contain bundles of actin filaments distributed orthogonally in an intermingled mesh. Our hypothesis is that these actin filaments are not forming a random intermingled mesh, but are actually arranged in contractile filaments in independent layers.

Diminished thrombogenic responses by deletion of the Podocalyxin Gene in mouse megakaryocytes.

Podocalyxin (Podxl) is a type I membrane sialoprotein of the CD34 family, originally described in the epithelial glomerular cells of the kidney (podocytes) in which it plays an important function. Podxl can also be found in megakaryocytes and platelets among other extrarenal places. The surface exposure of Podxl upon platelet activation suggested it could play some physiological role.

Release of podocalyxin into the extracellular space. Role of metalloproteinases.

Podocalyxin (PODXL) is a type I membrane mucoprotein abundantly presented in the epithelial cells (podocytes) of kidney glomeruli where it plays an important role in maintaining the plasma filtration. PODXL is also expressed in other types of cells but its function is ignored. A recombinant soluble fragment of the PODXL ectodomain modifies the signaling of the membrane bound PODXL.

Megakaryocyte gene targeting mediated by restricted expression of recombinase Cre.

The availability of mice with tissue-specific expression of recombinase Cre is the limiting step for a successful gene targeting by the Cre-LoxP methodology. This work aimed at generating transgenic mice with restricted expression of recombinase Cre in megakaryocytes and platelets, driven by the promoter of the αIIb gene (mαIIb-cre). Mice oocytes were microinjected with a 4.

Overexpression of podocalyxin in megakaryocytes and platelets decreases the bleeding time and enhances the agonist-induced aggregation of platelets.

Podocalyxin (PODXL) is a 145KDa sialoprotein abundantly expressed in the glycocalix of the intraglomerular kidney epithelial cells, essential in maintaining a normal renal function. PODXL is also found in vascular endothelial cells, megakaryocytes and platelets. The function of PODXL in platelets is ignored; however, its surface exposure upon platelet activation suggests its participation in controlling the hemostasis.

Ventricular enlargement associated with the panneural ablation of the podocalyxin gene.

Podocalyxin (Podxl) is a type I membrane mucin-protein of the CD34 family abundantly expressed in kidney epithelial cells (podocytes) where it plays a crucial functional role. Podxl is also expressed in tissues other than kidney, like in brain, but its function is ignored. To investigate the functional role of podocalyxin (Podxl) in brain we produced the specific brain-ablation of the Podxl gen in mice by crossing Podxl(floxed/floxed) mice, generated in our laboratory, to mice with pan-neural expression of recombinase Cre (Cre3).

Identification and characterization of Myosin from rat testicular peritubular myoid cells.

In the mammalian testis, peritubular myoid cells (PMCs) surround seminiferous tubules. These cells are contractile, express the cytoskeletal markers of true smooth muscle-alpha-isoactin and F-actin-and participate in the contraction of seminiferous tubules during the transport of spermatozoa and testicular fluid to the rete testis. Myosin from PMCs (PMC-myosin) was isolated from adult rat testis and purified by cycles of assembly-disassembly and sucrose gradient centrifugation.

Quilty effect areas are frequently associated with endocardial C4d deposition.

Background: The meaning and clinical implications of the Quilty effect (QE) are not entirely clear. In some biopsies we have found complement split C4d deposition in QE areas, but we do fully comprehend the frequency or pathogenic relationships involved. The objective of this study was to gain insight into the immunologic events involved in the QE, and to understand if and how it relates to complement activation.

Variations in platelet protein associated with arterial thrombosis.

Introduction: Hyperactivity of platelets has been associated with thrombotic episodes by molecular mechanisms not yet elucidated. The present work aimed at identifying whether the platelet protein content from patients who had suffered an arterial thrombosis episode differed from that of platelets obtained from normal healthy donors.

Methods: Differential platelet protein profiles were determined by 2-dimensional (2-D) gel electrophoresis and Western blot analysis of total platelet lysates.

Toxicological and biochemical response to azinphos-methyl in Cydia pomonella L. (Lepidoptera: Tortricidae) among orchards from the Argentinian Patagonia.

Background: Azinphos-methyl is the main insecticide used to control codling moth on apple and pears in Northern Patagonia. The aim of this study was to evaluate the toxicological and biochemical response of diapausing larvae of codling moth in orchards subjected to different insecticide selection pressure.

Results: Dose-mortality assays with azinphos-methyl in diapausing larvae of Cydia pomonella L.

Effects of seasonal mineral oil applications on the pest and natural enemy complexes of apple.

This 3-yr study examined the use of two different apple, Malus domestica Borkhausen, pest management programs based on horticultural mineral oil. Whereas oil provided some additional control of codling moth, Cydia pomonella (L.), when targeting eggs of both generations (Oil/Direct Pest program, typically six applications per season), the additional benefit was difficult to detect when densities were high.

Patients' opinions regarding preimplantation genetic diagnosis in a Latin American fertility clinic.

Patients' opinions concerning the use of preimplantation genetic diagnosis were evaluated in a fertility clinic with a specially designed questionnaire. The results of this study suggest that for couples with fertility problems, an embryo with severe genetic abnormalities has a different moral status than a healthy one.

Cytokine gene polymorphisms in heart transplantation: association of low IL-10 production genotype with Quilty effect.

Background: Cytokines are important modulators of post-transplant, allogeneic immune responses. In heart transplantation, endomyocardial biopsies allow monitoring of histologic and immunologic events that occur inside the graft; their correlation with risk factors condition graft outcome. Recent reports indicate that various cytokine gene allelic polymorphisms control the number of cytokines produced and may be associated with graft outcome.

Mucormycosis (zygomycosis) in a heart-kidney transplant recipient: recovery after posaconazole therapy.

We describe the case of a diabetic patient who developed a severe invasive fungal infection due to Rhizopus species postoperatively after a dual heart/kidney transplantation with subsequent intensive immunosuppressive therapy. No improvement was noted with amphotericin B (deoxycholate) therapy, but salvage treatment with the new azole antifungal posaconazole (200 mg orally 4 times daily) resulted in dramatic clinical improvement as early as 1 week after the initiation of therapy that continued through 23 weeks of treatment, with marked clinical, mycological, and radiological improvements and no adverse events.