subject: milk production

Prolactin Targets Intestines Too

Prolactin Targets Intestines Too

Prolactin (PRL) is a hormone that, as its name clearly indicates, PROmotes LACTation. Although it is best known for initiating milk production in the mammary glands, prolactin actually targets numerous other tissues throughout the body during lactation. One important target is the gut, where prolactin is believed to influence calcium absorption. A new study confirms this hypothesis, demonstrating that prolactin increases the ability of the intestines to absorb calcium and transfer it to the bloodstream. These important findings show that although PRL may have the important job of telling the mammary glands to make milk, it also plays a critical role in making sure that milk has all of the necessary ingredients. Read More...

Ancient Aurochs Genome Contains the DNA Blueprint for Modern Cattle

Ancient Aurochs Genome Contains the DNA Blueprint for Modern Cattle

A preserved specimen of aurochs bone was discovered deep beneath the Derbyshire Dales in the UK in the 1990s. Aurochs are an ancient cattle breed domesticated around 10,000 years ago somewhere around modern day Iran. In Europe, the last of these animals were still found on a Polish royal reserve as recently as the 17th century. Park et al., have now extracted enough DNA from the ancient bone specimen to sequence the aurochs genome. When they compared the aurochs sequence to the DNA of cattle breeds we know and use in domestic agriculture today, they found a surprisingly high level in common with British and Irish cattle. Read More...

Producing Human Milk Sugars for Use in Formula

Producing Human Milk Sugars for Use in Formula

It’s well known that human milk is good for you (1-5). Sugars, called oligosaccharides, form the third largest component of human milk and have been associated with many beneficial effects. These human milk oligosaccharides (HMOs) have been shown to influence the composition of the gut microbiome, modulate the immune system, and help protect against pathogens (6-11, 22) Given the various benefits of HMOs, there has been a lot of interest in figuring out how to introduce HMOs into formula. However, more than 200 human milk oligosaccharides have been discovered so far, and their variety and complexity makes them challenging to synthesize (21-23). Read More...

The Amazing Mammary Memory

The Amazing Mammary Memory

Any dairy farmer or lactation consultant knows that first-time mothers don’t produce as much milk. The peak daily production for a first calf heifer may be around 70 lbs of milk while the same animal on its second lactation can produce 90 lbs of milk daily. Somehow the mammary gland seems to remember how to make milk and does a better job the second time. Why is that? Read More...

Predicting Performance in Dairy Cows of the Future

Predicting Performance in Dairy Cows of the Future

Selective breeding of dairy cows is a major part of modern dairy farming. Farmers can select the bulls that they want to use to produce animals for their herd. One bull may sire thousands of daughter cows via highly developed systems for artificial insemination. The availability of lots of stored semen from bulls that have been shown to produce cows with excellent production and health traits has been a backbone of improving efficiency and production in dairy farms for several decades. There has been a continuous effort to build on the methods and procedures that contribute to selective breeding, most recently with the advent of genomic tools. Read More...

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