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Papers by Francisco Silva

Research paper thumbnail of Tutorial uso packet tracer y aplicaciones resueltas corpocides

Research paper thumbnail of Behavioural and psychiatric disorders in paediatric Wilson's disease

BMJ case reports, 2011

An 11-year-old boy was treated since 6-years-old with methylphenidate for combined attention defi... more An 11-year-old boy was treated since 6-years-old with methylphenidate for combined attention deficit and hyperactivity disorder. At age nine his behaviour had worsened and he started to have phobias. One year later persistent hypertransaminasemia was found. Physical examination showed a dysdiadocokinesia. Laboratory investigation revealed a low caeruloplasmin and augmented basal urinary copper with a positive postpenicillamine test. Liver biopsy showed high liver copper (853 µg/g) and brain MRI was normal. D-penicillamine and zinc acetate were started without side effects. ATP7B gene mutation was confirmed after treatment initiation.

Research paper thumbnail of Synthesis, characterization and cytotoxic activity of gallium(III) complexes anchored by tridentate pyrazole-based ligands

Journal of inorganic biochemistry, 2010

A series of novel titanocene-complexes has been prepared and evaluated for their growth regulator... more A series of novel titanocene-complexes has been prepared and evaluated for their growth regulatory effects in MCF7 and SkBr3 breast cancer cells. The capability of some of these compound to elicit relevant repressive effects on cancer cell growth could be taken into account towards novel pharmacological approaches in cancer therapy.

Research paper thumbnail of Generation of multipotent cell lines from a distinct population of male germ line stem cells

Reproduction (Cambridge, England), 2008

Spermatogonial stem cells (SSCs) maintain spermatogenesis by self-renewal and generation of sperm... more Spermatogonial stem cells (SSCs) maintain spermatogenesis by self-renewal and generation of spermatogonia committed to differentiation. Under certain in vitro conditions, SSCs from both neonatal and adult mouse testis can reportedly generate multipotent germ cell (mGC) lines that have characteristics and differentiation potential similar to embryonic stem (ES) cells. However, mGCs generated in different laboratories showed different germ cell characteristics, i.e., some retain their SSC properties and some have lost them completely. This raises an important question: whether mGC lines have been generated from different subpopulations in the mouse testes. To unambiguously identify and track germ line stem cells, we utilized a transgenic mouse model expressing green fluorescence protein under the control of a germ cell-specific Pou5f1 (Oct4) promoter. We found two distinct populations among the germ line stem cells with regard to their expression of transcription factor Pou5f1 and c-Kit receptor. Only the POU5F1C/c-KitC subset of mouse germ line stem cells, when isolated from either neonatal or adult testes and cultured in a complex mixture of growth factors, generates cell lines that express pluripotent ES markers, i.e., Pou5f1, Nanog, Sox2, Rex1, Dppa5, SSEA-1, and alkaline phosphatase, exhibit high telomerase activity, and differentiate into multiple lineages, including beating cardiomyocytes, neural cells, and chondrocytes. These data clearly show the existence of two distinct populations within germ line stem cells: one destined to become SSC and the other with the ability to generate multipotent cell lines with some pluripotent characteristics. These findings raise interesting questions about the relativity of pluripotency and the plasticity of germ line stem cells.

Research paper thumbnail of Synthesis and characterization of functional multicomponent nanosized gallium chelated gold crystals

Chemical Communications, 2014

Research paper thumbnail of Tutorial uso packet tracer y aplicaciones resueltas corpocides

Research paper thumbnail of Behavioural and psychiatric disorders in paediatric Wilson's disease

BMJ case reports, 2011

An 11-year-old boy was treated since 6-years-old with methylphenidate for combined attention defi... more An 11-year-old boy was treated since 6-years-old with methylphenidate for combined attention deficit and hyperactivity disorder. At age nine his behaviour had worsened and he started to have phobias. One year later persistent hypertransaminasemia was found. Physical examination showed a dysdiadocokinesia. Laboratory investigation revealed a low caeruloplasmin and augmented basal urinary copper with a positive postpenicillamine test. Liver biopsy showed high liver copper (853 µg/g) and brain MRI was normal. D-penicillamine and zinc acetate were started without side effects. ATP7B gene mutation was confirmed after treatment initiation.

Research paper thumbnail of Synthesis, characterization and cytotoxic activity of gallium(III) complexes anchored by tridentate pyrazole-based ligands

Journal of inorganic biochemistry, 2010

A series of novel titanocene-complexes has been prepared and evaluated for their growth regulator... more A series of novel titanocene-complexes has been prepared and evaluated for their growth regulatory effects in MCF7 and SkBr3 breast cancer cells. The capability of some of these compound to elicit relevant repressive effects on cancer cell growth could be taken into account towards novel pharmacological approaches in cancer therapy.

Research paper thumbnail of Generation of multipotent cell lines from a distinct population of male germ line stem cells

Reproduction (Cambridge, England), 2008

Spermatogonial stem cells (SSCs) maintain spermatogenesis by self-renewal and generation of sperm... more Spermatogonial stem cells (SSCs) maintain spermatogenesis by self-renewal and generation of spermatogonia committed to differentiation. Under certain in vitro conditions, SSCs from both neonatal and adult mouse testis can reportedly generate multipotent germ cell (mGC) lines that have characteristics and differentiation potential similar to embryonic stem (ES) cells. However, mGCs generated in different laboratories showed different germ cell characteristics, i.e., some retain their SSC properties and some have lost them completely. This raises an important question: whether mGC lines have been generated from different subpopulations in the mouse testes. To unambiguously identify and track germ line stem cells, we utilized a transgenic mouse model expressing green fluorescence protein under the control of a germ cell-specific Pou5f1 (Oct4) promoter. We found two distinct populations among the germ line stem cells with regard to their expression of transcription factor Pou5f1 and c-Kit receptor. Only the POU5F1C/c-KitC subset of mouse germ line stem cells, when isolated from either neonatal or adult testes and cultured in a complex mixture of growth factors, generates cell lines that express pluripotent ES markers, i.e., Pou5f1, Nanog, Sox2, Rex1, Dppa5, SSEA-1, and alkaline phosphatase, exhibit high telomerase activity, and differentiate into multiple lineages, including beating cardiomyocytes, neural cells, and chondrocytes. These data clearly show the existence of two distinct populations within germ line stem cells: one destined to become SSC and the other with the ability to generate multipotent cell lines with some pluripotent characteristics. These findings raise interesting questions about the relativity of pluripotency and the plasticity of germ line stem cells.

Research paper thumbnail of Synthesis and characterization of functional multicomponent nanosized gallium chelated gold crystals

Chemical Communications, 2014