Traditional approaches to pathophysiology are advancing but still have many limitations that arise from real biologic systems and their associated physiological phenomena being too complicated. Microfluidics is a novel technology in the field of engineering, which provides new options that may overcome these hurdles. Microfluidics handles small volumes of fluids and may apply to various applications such as DNA analysis chips, other lab-on-a-chip analyses, micropropulsion, and microthermal technologies. Among them, organ-on-a-chip applications allow the fabrication of minimal functional units of a single organ or multiple organs. Relevant to the field of nephrology, renal tubular cells have been integrated with microfluidic devices for making kidneys-on-a-chip. Although still early in development, kidneys-on-a-chip are showing potential to provide a better understanding of the kidney to replace some traditional animal and human studies, particularly as more cell types are incorporated toward the development of a complete glomerulion-a-chip.
Animals ; DNA ; Humans ; Kidney* ; Lab-On-A-Chip Devices ; Microfluidics ; Nephrology ; Physiological Phenomena

BACKGROUND: The breast cancer microenvironment contains a variety of stromal cells that are widely implicated in worse patient outcomes. While many in vitro models of the breast tumor microenvironment have been published, only a small fraction of these feature adipocytes. Adipocytes are a cell type increasingly recognized to have complex functions in breast cancer. METHODS: In this review, we examine findings from recent examples of in vitro experiments modeling adipocytes within the local breast tumor microenvironment. RESULTS: Both two-dimensional and three-dimensional models of adipocytes in the breast tumor microenvironment are covered in this review and both have uncovered interesting phenomena related to breast tumor progression. CONCLUSION Certain aspects of breast cancer and associated adipocyte biology: extracellular matrix effects, cell-cell contact, and physiological mass transport can only be examined with a three-dimensional culture platform. Opportunities remain for innovative improvements to be made to in vitro models that further increase what is known about adipocytes during breast cancer progression.

BACKGROUND: The breast cancer microenvironment contains a variety of stromal cells that are widely implicated in worse patient outcomes. While many in vitro models of the breast tumor microenvironment have been published, only a small fraction of these feature adipocytes. Adipocytes are a cell type increasingly recognized to have complex functions in breast cancer. METHODS: In this review, we examine findings from recent examples of in vitro experiments modeling adipocytes within the local breast tumor microenvironment. RESULTS: Both two-dimensional and three-dimensional models of adipocytes in the breast tumor microenvironment are covered in this review and both have uncovered interesting phenomena related to breast tumor progression. CONCLUSION Certain aspects of breast cancer and associated adipocyte biology: extracellular matrix effects, cell-cell contact, and physiological mass transport can only be examined with a three-dimensional culture platform. Opportunities remain for innovative improvements to be made to in vitro models that further increase what is known about adipocytes during breast cancer progression.

Objectives: We developed the multimodal program Nutrition and Exercise Treatment for Advanced Cancer (NEXTAC program). The aim of our study is to show algorithm of the home-based resistance training prescription and its compliance. Methods: We recruited 30 patients aged≥70 years scheduled to receive first-line chemotherapy for advanced pancreatic or non-small-cell lung cancer. Three educational sessions were planned in 8-week study period. Our resistance training consists of 3 or 5 of following 5 exercises components: (1) sit-to-stand, (2) calf raise, (3) knee extension, (4) knee raise, (5) side leg raise. Physiotherapist chose optimal prescription according to the modified Borg-scale. We assessed patient compliance, and safety. Results: Median proportion of days in which patients performed full or modified exercise program was 91%. Adverse events possibly related to the NEXTAC program were observed in 5 patients and included muscle pain (grade 1 in 2 patients), arthralgia (grade 1 in one patient), dyspnea on exertion (grade 1 in one patient), and plantar aponeurositis (grade 1 in one patient). Patient physical function and physical activity were maintained during the study period. Conclusion: Our resistance training showed excellent compliance and safety in elderly patients with newly diagnosed pancreatic and non-small-cell lung cancer receiving concurrent chemotherapy. Although this study was not designed to show the efficacy of the resistance training, our data indicate a potential protective effect on physical function and physical activity.