Effects of clay on fat necrosis and carcass characteristics in Japanese Black steers

Abstract

Twenty 10-month-old Japanese Black steers were used to evaluate the effects of clay on fat necrosis and carcass characteristics. Ten steers (Clay group) were fed the clay (50 g/day) during 10-30 months of age. The other 10 steers (Control group) were not fed it. There was no significant difference in body weight or average daily gain between the two groups (P > 0.05). The occurrence of fat necrotic mass in the Clay group (30%) was lower (P < 0.05) than that in the Control group (90%) at slaughter. The size of necrotic masses in the Clay group was smaller (P < 0.05) than that in the Control group. There was no significant difference in the marbling score, beef color, Longissimus muscle area or subcutaneous fat thickness between the two groups. These results suggest that the clay prevented the occurrence of fat necrosis and did not affect the carcass characteristics in Japanese Black steers.

Fat depot-specific differences of macrophage infiltration and cellular senescence in obese bovine adipose tissues

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A Postmortem Case Study—An Analysis of microRNA Patterns in a Korean Native Male Calf (Bos taurus coreanae) That Died of Fat Necrosis

“…While it is a rare occurrence, its incidence is progressively increasing, leading to economic losses on farms [ 4 ]. A study conducted on Japanese black cattle in 2013 reported that around 1000 cattle per year were affected by fat necrosis, resulting in their disposal and further financial implications [ 18 ]. Unlike in humans where fat necrosis is not fatal and commonly occurs in the breast, in cattle it primarily affects the abdominal organs, often leading to intestinal obstruction and death [ 19 ].…”

Breed differences in macrophage infiltration and senescence state in adipose tissues of Wagyu and Holsteins

“…These results indicate that breed differences between Wagyu and Holsteins affect the macrophage infiltration and senescence state in visceral adipose tissue. In fattening Wagyu cattle, obesity‐associated adipose tissue disorders, called “fat necrosis,” occasionally develop in visceral adipose tissue (Ishida, Noda, Jomane, & Tokunaga, 2017; Oka, Iwamoto, & Tatsuda, 2015), characterized by an increase in the fibrous area within visceral adipose tissue (Ito, Miura, Ohshima, & Numakunai, 1968). Severe obese conditions accelerate macrophage infiltration and stimulate fibrosis of adipose tissue both in humans and rodents (Divoux et al., 2010; Kawanishi, Niihara, Mizokami, Yano, & Suzuki, 2013; Khan et al., 2009; Reggio, Pellegrinelli, Clement, & Tordjman, 2013).…”