biological control

Rhopilema Akhziv is a migratory threadworm. Dr. Shavi Rothman, Tel Aviv University

Human-sponsored invasive species are involved in 60% of plant and animal extinctions; the damage is estimated at approximately 423 billion dollars per year

  • No comments
This is according to a report by the UN's IPBES committee, the equivalent of the IPCC that reports on the climate crisis
DNA molecule. Image: depositphotos.com

The loom of evolution

A new method makes it possible to locate points of similarity between gene control molecules of different species - from lizards to humans - and thus reveal essential sections that have been preserved throughout evolution
Cross section of the zebrafish heart 30 days after injury. The injured site (marked by an arrow) without a scar in a fish with normal lymphatic vessels (left) but not in a mutant fish that does not have these vessels (right)

heart of a fish

  • 2 תגובות
A section of a mouse brain showing the expression of the ASL enzyme (in purple) in the brainstem region called the locus coeruleus. The laboratory of Prof. Ayelet Erez, Weizmann Institute

On the way to the brain, we stop at the liver

  • No comments
Different parts of the chaser gene (points marked by arrows) are mainly expressed in the cell nucleus of a mouse embryo (marked in blue). This fact supports the hypothesis that the chaser is involved in the control of gene activity

When the chaser got stuck in traffic

  • 3 תגובות
Lungs of an untreated mouse with Ewing's sarcoma (left) containing many cancer cells (highlighted) that have spread from the bones, compared to almost completely clean lungs of a mouse treated with a drug that reduces glucocorticoid production (right)

The causes of the spread of bone cancer were revealed in Ewing's name

  • No comments
Disease at first glance: when a cell of the immune system (macrophage, in blue) meets a bacterium (in red), what happens in the first 48-24 hours is crucial

An algorithm that may predict the chance of contracting tuberculosis

  • No comments
Mouse embryonic stem cells were observed using a spinning disk confocal microscope. The levels of the protein that prevents stem cells from differentiating (green) decrease in the presence of high levels of another protein (purple) that causes mitochondria to elongate

The elongation of mitochondria in embryonic stem cells affects the process of differentiation into the various body tissues

  • No comments
Regrowth of nerve cell extensions surrounded by glial cells (cell nuclei are marked in blue), in the sciatic nerve of a mouse, seven days after injury (top) and 25 days after it (bottom). In mice without Silc1 (left column), the restoration is less powerful - the regrown nerve cell extensions (red) are shorter than in mice with an active Silc1 copy. Photographed using a fluorescence microscope

The gene plays a crucial role in nerve cell repair

  • No comments
The intestinal lining near a cancerous tumor. The enzyme ASL (reddish brown), essential for the production of nitric oxide, accumulated in large quantities in the mucosal cells, probably in an attempt to reduce intestinal inflammation, which often precedes colon cancer. Photo: Ayelet Erez, Weizmann Institute

Helping the body to help itself: how to relieve Crohn's and colitis?

  • One response
The endothelial cells, which make up the blood vessels of the zebrafish embryo (in red). The cell nuclei are marked in yellow. The stem cell pool is marked with an arrow

Wandering with gut feeling

  • 2 תגובות
A genetic disease caused by a mutation in a single gene. Illustration: Weizmann Institute

How a single gene that causes a rare disease helps in understanding complex diseases like cancer

  • 2 תגובות
Dr. Ayelet Erez. Photo: Weizmann Institute

double track

  • No comments
Right: Itamar Harel and Prof. Eldad Tzhor. genetic network

Myocardial

  • No comments
From the right: Alina Molchedsky, Gilad Landan, Naomi Goldfinger, Dr. Zohar Mochmal, Prof. Verda Rutter, Netta Mendelson Cohen, Dr. Amos Tanai and Amir Bar. adolescence

Epigenetics: It all depends on education

  • One response
The experimental system: two nostrils from which exit ultrasonic beams of excited helium atoms (in blue) and of argon atoms or hydrogen molecules (in red). The blue beam passes through a magnetic device (in yellow) which causes it to bend, and merges with the red beam - then the argon atoms or hydrogen molecules undergo ionization, and enter the detector. The picture above shows a cross-section of the magnetic device

expression and control

  • No comments
From the right: Dr. Dana Gantz, Dr. Lilach Gilboa and Tamar Langil. coordination. Photo: Weizmann Institute

A supportive environment

  • No comments
A mature egg is ready for fertilization. Around the egg - the follicle cells. Photo: Prof. Alex Tzafariri, Weizmann Institute

ripening

  • No comments
Minjun Li and Chun Xue with their daughter Yu-Yang. Extended family. Photo: Weizmann Institute

Eastern wind

  • No comments
Science website logo
SEARCH