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The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
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The hypodermis (the subcutaneous layer or superficial fascia) is present directly below the dermis. It connects the skin to the underlying fascia (fibrous tissue) of the bones and muscles. It is not strictly a part of the skin, although the border between the hypodermis and dermis can be difficult to distinguish. The hypodermis consists of well-vascularized, loose, areolar connective tissue and adipose tissue, which functions as a mode of fat storage and provides insulation and cushioning for...
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Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
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Updated: Apr 1, 2026

Isolation and Differentiation of Stromal Vascular Cells to Beige/Brite Cells
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Breaking BAT: can browning create a better white?

Amy Warner1, Jens Mittag2

  • 1AstraZenecaCVMD IMED, Pepparedsleden 1, 43183 Mölndal, SwedenCenter of BrainBehavior and Metabolism (CBBM), Medizinische Klinik 1, Universität zu Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany.

The Journal of Endocrinology
|October 10, 2015
PubMed
Summary
This summary is machine-generated.

This review explores beige adipocyte induction for weight loss and improved insulin sensitivity. It examines molecular pathways and discusses the potential of beige fat for treating metabolic diseases.

Keywords:
UCP1adipocytesadipose tissuebeige fatbrown fatenergy expenditurehumanmousethermogenesis

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Area of Science:

  • Metabolic research
  • Adipocyte biology
  • Obesity and metabolic disease

Background:

  • Obesity and related comorbidities pose a significant global health challenge.
  • Strategies to promote weight loss and enhance insulin sensitivity are actively sought.
  • White adipocytes can be 'browned' into beige adipocytes, promoting thermogenesis via uncoupling protein 1.

Purpose of the Study:

  • To review molecular pathways involved in beige adipocyte induction.
  • To evaluate the role of beige adipocytes in whole-body energy expenditure.
  • To discuss the translational potential of beige adipocyte browning for human metabolic diseases.

Main Methods:

  • Review of existing literature on beige adipocyte induction.
  • Analysis of molecular pathways, including direct and indirect mechanisms (CNS, immune system).
  • Examination of evidence regarding beige adipocyte contribution to energy expenditure in rodents.

Main Results:

  • The number of agents inducing beige adipocytes is increasing, but mechanisms are often unclear.
  • Some agents may induce browning indirectly.
  • The functional significance of beige adipocytes for whole-body energy expenditure requires further investigation.

Conclusions:

  • Understanding beige adipocyte induction mechanisms is crucial.
  • The capacity of beige adipocytes to impact energy expenditure needs more research.
  • Translating beige fat browning into human metabolic disease treatments faces challenges.