تتمّتع الخلايا الجذعية بقدرةٍ فريدة على التمايز إلى العديد من أنواع الخلايا التي تعوض بشكل طبيعي الفاقد من بعض خلايا الجسم و اللاحق لإصابة نسيجية. و يعد دم الحبل السري و نسيجه المصدرين الأهم للحصول على الخلايا الجذعية الموّلدة للدم HSCs و الخلايا الجذعية الميزنشيمية MSCs ,
على الترتيب، و يشكلان المادة الرئيسة في بنوك الخلايا الجذعية التي أسست في معظم أرجاء العالم و حديثاً جداً في سورية. مع ذلك، فقد
ركزت البحوث في منطقتنا بشكل رئيس على أساليب حفظ الخلايا و تجميدها مع القليل من الدراسات التي أُجريت لتحديد قدرة الخلايا المحفوظة على التمايز في الزجاج. هدف هذا البحث إلى اختبار القدرة الكامنة لخلايا جذعية
ميزنشيمية، معزولة من نسيج حبل سري بشري مأخوذ من ولادة قيصرية في مشفى التوليد الجامعي في دمشق و محفوظة بالتجميد، على التمايز لأنواع مختلفة من الخلايا استجابةً لعوامل نمو و تحريض نوعية لبعض النسائل
الخلوية.
Stem cells have unique capability to differentiate into many cell types that can
normally replace the loss in some cells of the body due to tissue injury. Umbilical cord blood (UCB) and
umbilical cord (UC) are the two main sources for hematopoietic stem cells (HSCs) and mesenchymal stem
cells (MSCs), respectively, which constitutes the basis for stem cell banks that have been established
worldwide and very recently in Syria. Research in our region has mainly focused on cell storage and
freezing protocols, and only few studies were conducted to prove the ability of the stored cells to
differentiate into their destined lineages. This study aimed to test the potential of cryopreserved MSCs
isolated from an umbilical cord taken from new delivery at Maternity University Hospital in Damascus, to
differentiate into various types of cells in response to growth and induction factors specific to cell lineages.
References used
Trounson A. (2009) New perspectives in human stem cell therapeutic research. BMC Medicine, 7(29): 1-5
Helmy KY, Patel SA, Silverio K, Pliner L, and Rameshwar P. (2010) Stem cells and regenerative medicine: accomplishments to date and future promise. The Deliv, 1(5): 693-705
Sensebe, L., Krampera, M., et al. (2010) Mesenchymal stem cells for clinical application. Vox Sang; 98: 93- 107
This research aims at establishing
and testing protocols for isolation, in vitro proliferation, phenotyping, and
differentiation of MSCs embedded in umbilical cord tissues of Syrian
newborns.
MSCs were isolated from two caesarian births depending
The study included 143 children from 214 newborn with high umbilical cord blood IgE (UC – IgE) at birth: more than 0.5 international unit per ml. We followed up these children from birth for 8 years.
We found positive atopic familial history by 51.7
40 samples were collected from milk from Homs to isolate the
bacteria and study their ability to produce the enzyme β-
galactosidase and diagnose isolates the most efficient in the
production of the enzyme, the results showed the presence of 25
sporeforming isolates producing the enzyme β-galactosidase , the
effectiveness of β-galactosidase was estimated using
spectrophotometer at a wavelength of 420 nm.
In this work, our goal is recognizing human action from video data. First we
propose an overview about Human Action Recognition, includes the famous
methods and previous algorithms, then we propose an algorithm and its
implementation using MATLAB.
The goal of this research is to study the expression of epidermal and
transforming growth factor receptor in normal human bone marrow (BM)
cell, and in leukemia ( myeloid and lymphatic leukemia ) which promoted
the research for the function of EGF