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The pentose phosphate pathway (PPP) operates in parallel with glycolysis, facilitating the metabolism of both pentoses and glucose. This pathway consists of two distinct phases: the oxidative and non-oxidative phases. While it does not directly generate ATP, the intermediates formed during the process can integrate into glycolysis, contributing to cellular energy metabolism when required.Oxidative Phase: NADPH ProductionThe oxidative phase of the pentose phosphate pathway is primarily...
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Cellular respiration is a fundamental metabolic process that enables organisms to generate energy from organic molecules. One of its central pathways is the tricarboxylic acid (TCA) cycle, also known as the Krebs cycle, which plays a crucial role in energy production and biosynthetic processes.Conversion of Pyruvate to Acetyl-CoAThe pyruvate generated from glycolysis undergoes oxidative decarboxylation by the pyruvate dehydrogenase complex, producing acetyl-CoA, one molecule of NADH, and one...
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Glycolysis, the Embden-Meyerhof pathway, is a central metabolic pathway involved in glucose catabolism. It is highly conserved across most organisms, reflecting its fundamental role in cellular energy production. This process occurs in the cytoplasm and can function both in the presence and absence of oxygen, making it versatile for various organisms and environmental conditions.Stages of GlycolysisGlycolysis is a ten-step pathway that converts glucose into pyruvate, generating a net gain of...
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Metabolic Pathway Confirmation and Discovery Through 13C-labeling of Proteinogenic Amino Acids
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Innovative metabolic operations.

Ricardo Cohen1, Pedro Paulo Caravatto1, Tarissa Zanata Petry1

  • 1Center for Obesity and Diabetes, Oswaldo Cruz German Hospital, Sao Paulo, Brazil.

Surgery for Obesity and Related Diseases : Official Journal of the American Society for Bariatric Surgery
|June 19, 2016
PubMed
Summary

Metabolic surgery can achieve type 2 diabetes remission independently of weight loss, even in individuals with lower BMIs. Newer experimental procedures also show promise for metabolic control without significant weight change.

Keywords:
Bariatric surgeryDuodenal jejunal bypassGastrointestinal surgeryIleal transpositionInnovative metabolic proceduresMetabolic surgeryObesityType 2 diabetes mellitus

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Area of Science:

  • Metabolic Surgery
  • Endocrinology
  • Gastroenterology

Background:

  • Bariatric surgery traditionally focused on weight reduction, with metabolic comorbidity resolution as a secondary outcome.
  • Remission of type 2 diabetes (T2D) has been observed with gastrointestinal surgeries, often preceding significant weight loss.

Purpose of the Study:

  • To explore the role of metabolic surgery in treating type 2 diabetes (T2D).
  • To highlight surgical approaches targeting T2D pathophysiology, irrespective of BMI or weight reduction goals.

Main Methods:

  • Review of traditional bariatric procedures (Roux-en-Y gastric bypass, bileopancreatic diversion, sleeve gastrectomy) and their impact on T2D.
  • Examination of newer, experimental metabolic surgery techniques (duodenal jejunal bypass, ileal transposition, etc.) focusing on pathophysiological T2D treatment.

Main Results:

  • Traditional gastrointestinal surgeries can induce T2D remission across various BMIs, often before substantial weight loss.
  • Experimental procedures demonstrate initial metabolic control for T2D, independent of weight variation.

Conclusions:

  • Metabolic surgery is a potent tool for managing the T2D epidemic, effective even in patients without severe obesity.
  • Emerging surgical techniques offer new avenues for T2D treatment by addressing underlying pathophysiology, not just weight.