WORLD OF REPRODUCTIVE BIOLOGY: Immune Defenders Keep Sperm under Control

WORLD OF REPRODUCTIVE BIOLOGY: Progesterone and Endocannabinoid Interaction Alters Sperm Activation

A recent study in Science finds that α/β-hydrolase domain-containing protein 2 (ABHD2) is a novel nongenomic progesterone receptor that holds the CatSper cation channel open while progesterone elevates sperm cytoplasmic calcium ion (Ca) levels and triggers sperm hyperactive motility. ABHD2 functions as a lipid hydrolase, breaking down arachidonoylglycerols (2-AG/1AG)—endocannabinoid components ...

How bacterial cells keep ribonucleases under control.

Ribonucleases (RNases) play an essential role in essentially every aspect of RNA metabolism, but they also can be destructive enzymes that need to be regulated to avoid unwanted degradation of RNA molecules. As a consequence, cells have evolved multiple strategies to protect RNAs against RNase action. They also utilize a variety of mechanisms to regulate the RNases themselves. These include pos...

Cranes of the World: 5. Comparative Reproductive Biology

Immune-Endocrine Cross-Talk in Reproductive Biology and Pathology

1 Department of Reproductive Immunology and Pathology, Institute of Animal Reproduction and Food Research of PAS, 10-748 Olsztyn, Poland 2Department of Morphology and Function, Faculty of Veterinary Medicine, University of Lisbon, 1300-477 Lisbon, Portugal 3 Laboratory of Reproductive Immunology, Department of Experimental Therapy, Institute of Immunology and Experimental Therapy of PAS, 53-114...

Reproductive Biology of Pigs