Pluripotent stem cell-derived somatic stem cells as tool to study the role of microRNAs in early human neural development.

The in vitro differentiation of human pluripotent stem cells represents a convenient approach to generate large numbers of neural cells for basic and translational research. We recently described the derivation of homogeneous populations of long-term self-renewing neuroepithelial-like stem cells from human pluripotent stem cells (lt-NES® cells). These cells constitute a suitable source of neural stem cells for in vitro modelling of early human neural development. Recent evidence demonstrates that microRNAs are important regulators of stem cells and nervous system development. Studies in several model organisms suggest that microRNAs contribute to different stages of neurogenesis - from progenitor self-renewal to survival and function of differentiated neurons. However, the understanding of the impact of microRNA-based regulation in human neural development is still at its dawn. Here, we give an overview on the current state of microRNA biology in stem cells and neural development and examine the role of the neural-associated miR-124, miR- 125b and miR-9/9* in human lt-NES® cells. We show that overexpression of miR-124, as well as overexpression of miR-125b, impair lt-NES® cell self-renewal and induce differentiation into neurons. Overexpression of the miR-9/9* locus also impairs self-renewal of lt-NES® cells and supports their commitment to neuronal differentiation. A detailed examination revealed that overexpression of miR-9 promotes differentiation, while overexpression of miR-9* affects both proliferation and differentiation of lt-NES® cells. This work provides insights into the regulation of early human neuroepithelial cells by microRNAs and highlights the potential of controlling differentiation of human stem cells by modulating the expression of selected microRNAs.

Management of a clinical and surgical centre in rural Cambodia (2006-2011).

The activities of the Bambino Gesù Paediatric Clinical and Surgical Centre Takeo in Cambodia started in May 2006, after the signature of a formal agreement between the Royal Government of Cambodia and the hospital. The paediatric centre is currently composed of an out-patients section with diagnostic ultrasound facilities and an obstetrics and gynaecology section, 3 consulting rooms, 20 beds for clinical activities, 13 beds for surgery, 7 beds for the paediatric intensive care unit, 2 dressing rooms, 1 out-patients sterile section, a library for off- and on-line consultation, a playroom and laundry facilities, and an administration office. For the last five years its activity has neen steadily on the increase, and the local population are beginning to look on the Centre as a full-scale local and regional referral hospital. From the 190 cases handled in 2006, the Centre increased to 669 surgical procedures in 2010 and 341 in the first four months of 2011, with good prospects of exceeding 1000 operations before the end of 2012. Takeo Centre also developed a Mobile Clinic Project to assist children directly in rural areas lacking health facilities. Today the Centre is a new reality in Cambodia's healthcare system.

Retrospective analysis of 200 severe post-burn cases in cambodia and bangladesh.

The experience is reported of two years' surgical activity carried out in hospitals for civil war victims in Battambang (Cambodia) and in an NGO hospital in Dhaka (Bangladesh) with regard to the treatment of non-acute burn patients. The aim of this report is to demonstrate that work in field hospitals deficient in means and equipment achieves the same results as those usually obtained in western hospitals. Our experience covers the surgical treatment of 200 patients with scars due to fire, acids, and land mines. We mainly treated patients with scars compromising or preventing the normal activity of limbs and extremities, with the aim of restoring correct functionality and an aesthetically satisfactory appearance.