Oogenesis: Matrix Revolutions

نویسندگان

  • Rebecca Bastock
  • Daniel St Johnston
چکیده

The mechanism of egg-chamber elongation during Drosophila oogenesis has always been mysterious. A new study shows that the egg chambers spin around their long axis laying down polarised extracellular matrix, which acts as a molecular corset to restrict radial expansion.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Global tissue revolutions in a morphogenetic movement controlling elongation.

Polarized cell behaviors drive axis elongation in animal embryos, but the mechanisms underlying elongation of many tissues remain unknown. Eggs of Drosophila undergo elongation from a sphere to an ellipsoid during oogenesis. We used live imaging of follicles (developing eggs) to elucidate the cellular basis of egg elongation. We find that elongating follicles undergo repeated rounds of circumfe...

متن کامل

An electron microscope study on the oocyte, test cells and follicular envelope of the tunicate, Molgula manhattensis.

Both inner follicle cells and test cells in the tunicate ovary appear to engage in active synthesis and secretion during growth of the oocyte. Both cell types contain prominent Golgi systems, numerous vesicles and cisternae of endoplasmic reticulum, and typical mitochondria. Two types of special inclusions develop in the inner follicle cells. The first is a homogeneous inclusion of low density ...

متن کامل

VISIONS: the art of science.

Genes involved in the echinoderm block to polyspermy are synthesized primarily in the oocyte. Their expression begins early in oogenesis and continues until germinal vesicle breakdown, when the transcript is rapidly turned over, leaving only traces of the active transcript. These oocyte-specifi c genes encode proteins in the egg extracellular matrix and the cortical granules, secretory vesicles...

متن کامل

The effect of Hydro-alcoholic extract of pumpkin seeds on Oogenesis and Hormone-Pituitary-Ovarian Axis in Mature Rats

Introduction: In traditional medicine, pumpkin seeds are prescribed and used commonly as energetic and sexual enhancer substances. This study was planned and carried out in order to fill the gap caused by the lack of sufficient scientific evidence on the effect of this substance on oogenesis and hormone-pituitary-ovarian axis. Revealing the effect of hydro-alcoholic extract of pumpkin seeds on ...

متن کامل

Accessory nuclei in insect oogenesis: in search of the function of enigmatic organelles.

This review compiles present knowledge of the structure and molecular composition of the enigmatic cytoplasmic organelles called accessory nuclei. Most typically, they are found in the perinuclear cytoplasm in oocytes of insects and several other invertebrates. Accessory nuclei originate by budding of the oocyte nucleus (germinal vesicle) and are surrounded by an envelope identical to the nucle...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Current Biology

دوره 21  شماره 

صفحات  -

تاریخ انتشار 2011