Two-dimensional hybrid germanium zeotype formed by selective coordination of the trans-1,2-diaminocyclohexane isomer to the ge atom: heterogeneous acid-base bifunctional catalyst.

[C 6H 10(NH 2) 2Ge 3O 6] ICMM9 is a two-dimensional germanate in which the metallic atoms are covalently bonded to chelating diamines. Its layered structure having some similitude with that of the pyroxene mineral, presents a totally new topology with two 4-c nodes. The solvothermal synthesis reaction allows the separation in situ of the two 1,2-diaminocyclohexane isomers by selective coordination of the trans isomer to octahedral Ge atoms of the ICMM9 framework. This material behaves as an active and selective heterogeneous acid-base bifunctional catalyst.

Caracterización clínica y citogenética de una cohorte de pacientes con leucemia promielocítica aguda atendidos en un Hospital Universitario en Medellín, Colombia / Clinical and cytogenetic characterization of a cohort of patients with acute promyelocytic leukemia treated at a University Hospital in Medellín, Colombia

Introducción. La leucemia promielocítica aguda (LPA) es un subtipo poco frecuente de leucemia mieloide aguda (LMA), que se caracteriza por un comportamiento clínico particularmente agresivo, y en ausencia de tratamiento, su curso generalmente es fatal. El objetivo de este trabajo fue determinar las características clínicas y citogenéticas de una cohorte de pacientes con LPA, con la finalidad de evaluar su relación con las complicaciones, el pronóstico y el desenlace de estos pacientes. Metodología. Se realizó un estudio observacional, descriptivo, retrospectivo de los pacientes mayores de 15 años con diagnóstico de LPA, atendidos en el Hospital Universitario San Vicente Fundación, entre los años 2012 a 2020. Resultados. Un total de 32 pacientes fueron incluidos. La edad media del diagnóstico fue 37 años. El 84,4% de los pacientes tenía la traslocación (15;17) en el cariotipo, y el 93,75% tenían FISH positivo. El 12,5% de los casos tenían cariotipo complejo. La mortalidad en los primeros 30 días fue del 15,6%, siendo el sangrado la causa de muerte más frecuente. Todos los pacientes que sobrevivieron alcanzaron la remisión completa (84,3%). En un promedio de seguimiento de 24 meses, el 14,8% de los casos recayeron. En el análisis bivariado se encontró relación entre sexo masculino y tener cariotipo complejo (p=0,015). No se encontró relación entre cariotipo complejo y mortalidad temprana (p=0,358), tampoco entre cariotipo complejo y recaída (p=0,052). Conclusiones. Se presentan las características clínicas y citogenéticas de una cohorte de pacientes con LPA en Colombia. El sangrado en el sistema nervioso central fue la principal causa de mortalidad temprana, todos los pacientes que sobrevivieron alcanzaron la remisión completa con la terapia de inducción. Las tasas de mortalidad, remisión completa y recaída fueron similares a las reportadas por otras series latinoamericanas, pero inferiores a estudios provenientes de países europeos. Contrario a lo reportado en otros estudios, no se encontró relación entre el cariotipo complejo y la mortalidad temprana o recaída.

Introduction. Acute promyelocytic leukemia (APL) is a rare subtype of acute myeloid leukemia (AML), characterized by a particularly aggressive clinical behavior, that in the absence of treatment is usually fatal. The objective of this work was to determine the clinical and cytogenetic characteristics of a cohort of patients with APL, in order to evaluate their relationship with the outcome and prognosis of these patients. Methodology. An observational, descriptive, retrospective study of patients older than 15 years with a diagnosis of APL treated at the Hospital Universitario San Vicente Fundación, between 2012 and 2020, was carried out. Results. A total of 32 patients were included. The mean age at diagnosis was 37 years, 84.4% of the patients had the t(15;17) in the karyotype, and 93.75% had positive FISH. 12.5% of cases had a complex karyotype. Mortality in the first 30 days was 15.6%, with bleeding being the most common cause of death. All patients who survived achieved complete remission (84.3%). In an average follow-up of 24 months, 14.8% of cases relapsed. In the bivariate analysis, a relationship was found between the male sex and having a complex karyotype (p<0.015). No relationship was found between complex karyotype and early mortality (p=0.358), nor between complex karyotype and relapse (p=0.052). Conclusions. We present the clinical and cytogenetic characteristics of a cohort of patients with APL in Colombia. Central nervous system bleeding was the main cause of early mortality, with all surviving patients achieving complete remission on induction therapy. Mortality, complete remission and relapse rates were similar to those reported by other Latin American series, but lower than studies from European countries. Contrary to what has been reported in other studies, no relationship was found between complex karyotype and early mortality or relapse

Patterning of Endothelial Cells and Mesenchymal Stem Cells by Laser-Assisted Bioprinting to Study Cell Migration.

Tissue engineering of large organs is currently limited by the lack of potent vascularization in vitro. Tissue-engineered bone grafts can be prevascularized in vitro using endothelial cells (ECs). The microvascular network architecture could be controlled by printing ECs following a specific pattern. Using laser-assisted bioprinting, we investigated the effect of distance between printed cell islets and the influence of coprinted mesenchymal cells on migration. When printed alone, ECs spread out evenly on the collagen hydrogel, regardless of the distance between cell islets. However, when printed in coculture with mesenchymal cells by laser-assisted bioprinting, they remained in the printed area. Therefore, the presence of mesenchymal cell is mandatory in order to create a pattern that will be conserved over time. This work describes an interesting approach to study cell migration that could be reproduced to study the effect of trophic factors.

One teflon-like channelled nanoporous polymer with a chiral and new uninodal 4-connected net: sorption and catalytic properties.

Zn(C17H8F6O4) is the first example of a fluoro-lined nanotube organo-inorganic 3D polymeric chiral structure, which possesses two different types of isolated channels, one of them being laid out with a double spiral of CF3-groups from the ligand molecule; the structure is a new uninodal 4-connected net that only exists when bent ligands connect the centres, and the compound exhibits selective sorption and catalytic chiral recognition properties.

A germanium zeotype with a three-dimensional net of interconnected 14-, 12- and 12-ring channels. Ge13O26(OH)4[C6N2H16]2(H2O)1.5.

Ge(13)O(26)(OH)(4)[C(6)N(2)H(16)](2)(H(2)O)(1.5) is a novel germanium zeotype built up from a new type of SBU; the SBU-13 is formed from polyhedra distributed in three shells. Its open 3D framework has a three-dimensional system of intersecting channels, where the 14-ring channels are lined with OH(-) anions.

Fe(III)/Fe(II) regular charge order in metal-organic framework.

The hydrolysis of the DMF solvent (DMF = N,N'-dimethylformamide) generates in situ the template cations DMA(+) (dimethylammonium cation): it leads to the first MOF type solid Fe(III)(0.5)Fe(II)(0.5)(OH,F)(O(2)C-C(6)H(4)-CO(2))·0.5DMA with a regular charge order Fe(III)/Fe(II) and an anionic framework with pores filled by counter-cations which behaves as a quasi-1D AF system with alternate localized Fe(II) and Fe(III) moments.

GeO2 natrolite-type infinite four and eight R-containing layers in a 2D pure-Ge framework: Ge3O5(OH)4[C2N2H10].

A new two-dimensional framework germanate, Ge3O5(OH)4[C2N2H10] (denoted ICMM-8), with a 3:9 Ge:O ratio has been synthesized, using a mixture of pyridine, water, and ethanol as the solvent and 1,4-diazabicyclo[2.2.2]octane and ethylenediamine as the structure-directing agents, under solvothermal conditions. The structure was determined by single-crystal X-ray diffraction. In this new compound, the GeO2 natrolite-type infinite four and eight R-containing layers appears for the first time in a pure GeO2 framework. The total 2D structure is built up from SBU-6, four tetrahedra, and two octahedra. The hydroxyl groups occupy four positions of each octahedral germanium atom. The compound is characterized by IR spectra and TGA-DTA. Crystal data: Ge3O5(OH)4[C2N2H10], monoclinic space group P2(1)/c; a = 11.3570(9) Angstroms, b = 8.8819(7) Angstroms, c = 9.9200(8) Angstroms, beta = 90.710(1), V = 1000.6(1) Angstroms(3), Z = 4, R(1) = 0.044 (I > 2(I)), and wR(2) = 0.1051 (all data).