CASE STUDY: Carcass and meat characteristics and M. longissimus thoracis histology of beef from calf-fed and yearling-fed Angus steers

Brooks, M. A.; Choi, Chang Weon; Lunt, D. K.; Miller, R. K.; Choi, Cheol; Smith, Stephen B.

doi:10.15232/s1080-7446(15)30503-9

Cited by 15 publications

(10 citation statements)

References 34 publications

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“…Marbling adipose tissue, also known as interfascicular or intramuscular adipose tissue, represents a unique adipose tissue depot. It can be distinguished from other fat depots by its location within perimysial connective tissues alongside muscle fibers (Moody and Cassens, 1968;Brooks et al, 2011b;Figure 4a & 4b). For this reason, marbling adipocytes are thought to arise from the differentiation and lipid filling of fibroblasts within the perimysial connective tissue strands between muscle bundles.…”

Section: Histology Of Marblingmentioning

confidence: 99%

“…Marbling consists of clusters of individual cells (adipocytes), and intramuscular adipocytes increase both in number and size in cattle as beef progresses from being Practically Devoid to higher marbling scores (Moody and Cassens, 1968;Schiavetta et al, 1990;May et al, 1994;Brooks et al, 2011b).…”

Section: Histology Of Marblingmentioning

confidence: 99%

“…In cattle as well as other livestock species, intramuscular adipocytes are almost invariably located within the perimysial connective tissue, between muscle fiber bundles (fasciculi) (Moody and Cassens, 1968;Brooks et al, 2011b;[Figure 4a & 4b]). However, in longissimus muscle from Japanese Black A5 cattle (the highest quality grade in Japan), marbling adipocytes have been observed within muscle bundles (Smith et al, 2000; Figure 5), indicating that a cell type unique from perimysial connective tissue fibroblasts can be induced to differentiate into marbling adipocytes.…”

Section: Marbling or Steatosis?mentioning

confidence: 99%

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0794 Marbling: Management of cattle to maximize the deposition of intramuscular adipose tissue

Smith

Johnson

2016

Journal of Animal Science

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Section: Histology Of Marblingmentioning

confidence: 99%

Section: Histology Of Marblingmentioning

confidence: 99%

Section: Marbling or Steatosis?mentioning

confidence: 99%

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0794 Marbling: Management of cattle to maximize the deposition of intramuscular adipose tissue

Smith

Johnson

2016

Journal of Animal Science

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“…Preadipocytes and adipocytes are a major factor for adipose tissue expansion, as well as being the main contributors to intramuscular fat deposition. Hypertrophy of adipocytes occurs as they accumulate triglycerides created through lipogenesis [4][5] [6] [7]. Because of the importance of adipogenesis, there has been considerable research carried out on different approaches to enhance intramuscular fat deposition.…”

Section: Imentioning

confidence: 99%

Development of Marbling in Beef Cattle Can Be Modulated through the Control of Adipogenic Activity

Wandita¹,

Bataar²,

Joshi³

et al. 2018

Proceedings of the International Conference on Food, Agriculture and Natural Resources (FANRes 2018)

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Increase in marbling is one of the essential factors for enhancement of tenderness in beef. Adipogenesis; the main contributor in marbling, consists of two stages: preadipocyte determination and adipocyte differentiation. Preadipocyte determination occurs even from growing stage, while adipocyte differentiation occurs in fattening stage of beef cattle. The effectiveness of nutritional and hormonal challenges to enhance adipogenesis is important to design a least-cost production. The influence of nutrition and hormone was found on adipogenesis in stromal vascular cells isolated from native Hanwoo beef cattle adipose tissue. In this study, high level of acetate, which is the most predominant volatile fatty acid produced in the rumen, was effectively increased preadipocyte determination in stromal vascular cells, while high level of propionate was observed to effectively support adipocyte differentiation. On the other hand, a high level of testosterone was observed to decrease adipogenesis. This study suggests that acetate is preferred in the growing stage and propionate in the fattening stage. Furthermore, low concentration of testosterone is favorable for the preadipocyte determination of progenitor cells as well as adipocyte differentiation.

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“…Pre-adipocytes and adipocytes are major factors for adipose tissue expansion, as well as being the main contributors to intramuscular fat deposition. Hypertrophy of adipocytes occurs as they accumulate triglycerides created through lipogenesis (Hausmann et al, 2001;Fernyhough et al, 2007;Brooks et al, 2011;Lee et al, 2010). Because of the importance of adipogenesis, many scientists are carrying out research to enhance intramuscular fat deposition by different approaches.…”

Section: Introductionmentioning

confidence: 99%

Pre-Adipocyte Determination and Adipocyte Differentiation of Stromal Vascular Cells Isolated From Intramuscular Tissue of Hanwoo Beef Cattle Treated by Acetate and Propionate

Wandita

Joshi

Kim

et al. 2018

Trop. Anim. Sci. J.

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The effects of acetate and propionate in enhancing intramuscular fat (marbling) deposition in beef cattle are poorly understood. This study aimed to evaluate the effects of acetate and propionate on preadipocyte determination and adipocyte differentiation in stromal vascular cells (SVC) isolated from the intramuscular tissue of Hanwoo beef cattle. SVC were isolated and treated with different concentrations of acetate and propionate (0.125 to 1 mM). Pre-adipocyte determination was observed through the Zfp423 (Zinc finger protein 423) and Pref-1 (Pre-adipocyte factor-1) genes expressions, which were important transcription factors used to identify committed pre-adipocytes. Adipocyte differentiation was determined based on the lipid accumulation, triglyceride contents, and their molecular activities related to adipogenic markers. The results suggest that acetate supports pre-adipocyte determination in SVC which is observed to increase the expression of Zfp423 and Pref-1 along with the increasing acetate concentration. Propionate treatment was seen to significantly affect lipid accumulation as well as triglyceride content in SVC, compared to acetate treatment. Furthermore, propionate treatment very significantly increased the expressions of PPARγ, C/EBPα, SREBP-1c, and FABP4. In conclusion, acetate likely enhances pre-adipocyte determination, while propionate effectively promotes adipogenesis in SVC isolated from the intramuscular tissue of Hanwoo beef cattle.

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CASE STUDY: Carcass and meat characteristics and M. longissimus thoracis histology of beef from calf-fed and yearling-fed Angus steers

Cited by 15 publications

References 34 publications

0794 Marbling: Management of cattle to maximize the deposition of intramuscular adipose tissue

0794 Marbling: Management of cattle to maximize the deposition of intramuscular adipose tissue

Development of Marbling in Beef Cattle Can Be Modulated through the Control of Adipogenic Activity

Pre-Adipocyte Determination and Adipocyte Differentiation of Stromal Vascular Cells Isolated From Intramuscular Tissue of Hanwoo Beef Cattle Treated by Acetate and Propionate

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