Bioblast alert 2015
From Bioblast
Bioblast alert is prepared by the Bioblast editorial board to draw attention to specific topics on the Bioblast wiki.
Bioblast alert: for information purposes, not intended to be an advertisement. Contributions are welcome.
Bioblast alert 2012(03): 2012-03-23 / 2012-04-03
MitoPedia topic: Oxygen dependence of ROS production - are permeabilized fibres a valid model?
--> Discussion
Drosophila vs. sandworm: High-resolution respirometry in permeabilized muscle fibres
- Pichaud N, Rioux P, Blier PU (2012) In situ quantification of mitochondrial respiration in permeabilized fibers of a marine invertebrate with low aerobic capacity. Comp Biochem Physiol A Mol Integr Physiol 161: 429-435.
- Pichaud N, Ballard JWO, Tanguay RM, Blier PU (2011) Thermal sensitivity of mitochondrial functions in permeabilized muscle fibers from two populations of Drosophila simulans with divergent mitotypes. Am J Physiol Regul Integr Comp Physiol 301: R48-R49.
New from the Ballard lab:
Bioblast alert 2012(02): 2012-03-06
- 50 Years ago: Nick Holonyak, considered as the "father of the light-emitting diode", developed the first practical visible-spectrum LED in 1962. Which colour? What is a LED? >>> see Glossary: Fluorescence
Mitochondrial dys/function in obesity vs. anorexia:
- Lindfors C, Nilsson IA, Garcia-Roves PM, Zuberi AR, Karimi M, Donahue LR, Roopenian DC, Mulder J, UhlΓ©n M, EkstrΓΆm TJ, Davisson MT, HΓΆkfelt TG, Schalling M, Johansen JE (2011) Hypothalamic mitochondrial dysfunction associated with anorexia in the anx/anx mouse. Proc Natl Acad Sci U S A 108: 18108-18113.
- Holmstrom MH, Iglesias-Gutierrez E, Zierath JR, Garcia-Roves PM (2012) Tissue-specific control of mitochondrial respiration in obesity-related insulin resistance and diabetes. Am J Physiol Endocrinol Metab 302: E731-E739.
Bioblast alert 2012(01): 2012-02-27
Two exciting publications on mitochondrial p50, apparent excess capacity of cytochrome c oxidase, basal metabolic rate, P/O ratios and ergometric efficiency:
- Larsen FJ, Schiffer TA, Sahlin K, Ekblom B, Weitzberg E, Lundberg JO (2011) Mitochondrial oxygen affinity predicts basal metabolic rate in humans. FASEB J 25: 2843-2852.
- Larsen FJ, Schiffer TA, Borniquel S, Sahlin K, Ekblom B, Lundberg JO, Weitzberg E (2011) Dietary inorganic nitrate improves mitochondrial efficiency in humans. Cell Metab 13: 149-159.
Bioblast alert 2011(04): 2011-12-24
- Congratulations to Dr. Dominik Pesta, for receiving his degree of a PhD at the Medical University of Innsbruck! (Jan 2012)
- Bioblast editorial board - Why a wiki editorial board?
- SUIT protocols for HRR: from intact cells to permeabilized muscle fibres:
Bioblast alert 2011(03): 2011-11-24
- Fluorometry combined with high-resolution respirometry: Light guide inserted into the chamber through a black PEEK stopper[1], or optical probe operated through the O2k-glass window[2].
- β Anderson EJ, Rodriguez E, Anderson CA, Thayne K, Chitwood WR, Kypson AP (2011) Increased propensity for cell death in diabetic human heart is mediated by mitochondrial-dependent pathways. Am J Physiol Heart Circ Physiol 300: H118-124.
- β Hickey AJ, Renshaw GM, Speers-Roesch B, Richards JG, Wang Y, Farrell AP, Brauner CJ (2012) A radical approach to beating hypoxia: depressed free radical release from heart fibres of the hypoxia-tolerant epaulette shark (Hemiscyllum ocellatum). J Comp Physiol B [Epub ahead of print]
- Fluorometry versus fluorimetry - term of the week. >>>New Glossary: Fluorometry - high-resolution terminology.
Bioblast alert 2011(02): 2011-11-17
- Heart failure and mitochondrial dysfunction. Increased OXPHOS capacity after cold preservation of the human heart β a paradox resolved by a dyscoupling mechanism.
- Tissue storage on ice is possible for limited periods of time (several hours) with preservation of mitochondrial respiratory function, as evaluated with SUIT protocols. (Scientific service)
- Uncoupled, non-coupled, dyscoupled - term of the week: a hallmark of high-resolution respirometry is a matching high-resolution terminology.
- Evaluate an example of low-resolution terminology: Uncoupling was studied in stressed cells by measurement of coupled respiration, evaluation of uncoupled respiration after inhibition with oligomycin, and FCCP titration to quantify uncoupled respiration.
Bioblast alert 2011(01): 2011-11-11
- A key question on the separation of qualitative versus quantitative change of mitochondrial function is addressed in a new O2k-Publication. Does training induce mild uncoupling? Are sedentary humans healthy controls?
- ETS capacity plays a key role in such analyses, which cannot be achieved quantitatively without careful uncoupler titrations. (Scientific service)
- Basal respiration - term of the month: a hallmark of high-resolution respirometry is a matching high-resolution terminology.