Shane Rea
Nov 1, 1997; 46:1667-1677
Perspectives in Diabetes

G Perseghin
Aug 1, 1999; 48:1600-1606
Articles

Tatsuya Hayashi
Aug 1, 1998; 47:1369-1373
Rapid Publications

Eve Van Cauter
Mar 1, 1992; 41:368-377
Original Article

D A Pan
Jun 1, 1997; 46:983-988
Original Article

Samar I. Itani
Jul 1, 2002; 51:2005-2011
Rapid Publications

Andreas Festa
Apr 1, 2002; 51:1131-1137
Complications

Ralph A DeFronzo
Jun 1, 1988; 37:667-687
Lilly Lecture 1987

David E. Kelley
Oct 1, 2002; 51:2944-2950
Metabolism and Signal Transduction

THE EDITOR, Madam: I arrived at the Constant Spring tax office at 6:05 a.m. on Monday, May 4 to renew my vehicle registration. At that hour, there were already 30 persons ahead of me. Persons related horror stories of spending up to five hours in...

Insulin-mediated microvascular recruitment (IMVR) regulates delivery of insulin and glucose to insulin-sensitive tissues. We have previously proposed that perivascular adipose tissue (PVAT) controls vascular function through outside-to-inside communication and through vessel-to-vessel, or "vasocrine," signaling. However, direct experimental evidence supporting a role of local PVAT in regulating IMVR and insulin sensitivity in vivo is lacking. Here, we studied muscles with and without PVAT in mice using combined contrast-enhanced ultrasonography and intravital microscopy to measure IMVR and gracilis artery diameter at baseline and during the hyperinsulinemic-euglycemic clamp. We show, using microsurgical removal of PVAT from the muscle microcirculation, that local PVAT depots regulate insulin-stimulated muscle perfusion and glucose uptake in vivo. We discovered direct microvascular connections between PVAT and the distal muscle microcirculation, or adipomuscular arterioles, the removal of which abolished IMVR. Local removal of intramuscular PVAT altered protein clusters in the connected muscle, including upregulation of a cluster featuring Hsp90ab1 and Hsp70 and downregulation of a cluster of mitochondrial protein components of complexes III, IV, and V. These data highlight the importance of PVAT in vascular and metabolic physiology and are likely relevant for obesity and diabetes.

A single bout of exercise enhances insulin action in the exercised muscle. However, not all human studies find that this translates into increased whole-body insulin action, suggesting that insulin action in rested muscle or other organs may be decreased by exercise. To investigate this, eight healthy men underwent a euglycemic-hyperinsulinemic clamp on 2 separate days: one day with prior one-legged knee-extensor exercise to local exhaustion (~2.5 h) and another day without exercise. Whole-body glucose disposal was ~18% lower on the exercise day as compared with the resting day due to decreased (~37%) insulin-stimulated glucose uptake in the nonexercised muscle. Insulin signaling at the level of Akt2 was impaired in the nonexercised muscle on the exercise day, suggesting that decreased insulin action in nonexercised muscle may reduce GLUT4 translocation in response to insulin. Thus, the effect of a single bout of exercise on whole-body insulin action depends on the balance between local effects increasing and systemic effects decreasing insulin action. Physiologically, this mechanism may serve to direct glucose into the muscles in need of glycogen replenishment. For insulin-treated patients, this complex relationship may explain the difficulties in predicting the adequate insulin dose for maintaining glucose homeostasis following physical activity.

5 December 2017

Lower-income countries are in many ways more ‘circular’ than their developed-economy counterparts – the question is how to turn this into a development opportunity.

Invitation Only Research Event

Event participants

Tim Yeo, Chairman, The New Nuclear Watch Institute
Chair: Antony Froggatt, Senior Research Fellow, Energy, Environment and Resources, Chatham House 

Incorporation of ribonucleotides into DNA can severely diminish genome integrity. However, how ribonucleotides instigate DNA damage is poorly understood. In DNA, they can promote replication stress and genomic instability and have been implicated in several diseases. We report here the impact of the ribonucleotide rATP and of its naturally occurring damaged analog 1,N6-ethenoadenosine (1,N6-ϵrA) on translesion synthesis (TLS), mediated by human DNA polymerase η (hpol η), and on RNase H2–mediated incision. Mass spectral analysis revealed that 1,N6-ϵrA in DNA generates extensive frameshifts during TLS, which can lead to genomic instability. Moreover, steady-state kinetic analysis of the TLS process indicated that deoxypurines (i.e. dATP and dGTP) are inserted predominantly opposite 1,N6-ϵrA. We also show that hpol η acts as a reverse transcriptase in the presence of damaged ribonucleotide 1,N6-ϵrA but has poor RNA primer extension activities. Steady-state kinetic analysis of reverse transcription and RNA primer extension showed that hpol η favors the addition of dATP and dGTP opposite 1,N6-ϵrA. We also found that RNase H2 recognizes 1,N6-ϵrA but has limited incision activity across from this lesion, which can lead to the persistence of this detrimental DNA adduct. We conclude that the damaged and unrepaired ribonucleotide 1,N6-ϵrA in DNA exhibits mutagenic potential and can also alter the reading frame in an mRNA transcript because 1,N6-ϵrA is incompletely incised by RNase H2.

by Doug O’Roark Executive Director, Math Circles of Chicago The New York Times recently published an article entitled “The Right Answer? 8,186,699,633,530,061 (An Abacus Makes It Look Almost Easy)”. Its lead photograph features over 100 children seated at desks, facing … Continue reading →

The Cleveland Cavaliers are planning to reopen their training facility for limited individual workouts amid the coronavirus pandemic.

U.S. Navy ships on Monday entered the Barents Sea between Norway and Russia, for the first time since the 1980s, "to assert freedom of navigation and demonstrate seamless integration among allies," the U.S. Navy said.

OBJECTIVE

Obesity is associated with microvascular insulin resistance, which is characterized by impaired insulin-mediated microvascular recruitment. Glucagon-like peptide 1 (GLP-1) recruits skeletal and cardiac muscle microvasculature, and this action is preserved in insulin-resistant rodents. We aimed to examine whether GLP-1 recruits microvasculature and improves the action of insulin in obese humans.

From online petitions to organized walkouts, corporate America is facing increasing employee activism over its business involvement with agencies implementing the federal government's immigration policies. This "cubicle activism," seen at companies ranging from Amazon and Google to Bank of America and Wayfair, has garnered mixed success to date, forcing divestiture from private prison contractors but fewer results in other contexts, as this article explores.

A team of researchers at the University of California, Los Angeles School of Dentistry has developed a nanoparticle that could improve treatment for bone defects.

Some 30 companies including Dow, Total and other big makers of plastic raised $1 billion to contribute to cleaner ocean waters.

OBJECTIVE

We examined detailed renal and cardiovascular (CV) outcomes after gastric bypass (GBP) surgery in people with obesity and type 2 diabetes mellitus (T2DM), across several renal function categories, in a nationwide cohort study.

Researchers suggest the coldest material in the universe could reveal the presence of dark matter particles.

I’ve been talking to a man, we have mutual interest in each other. We talked on the phone for over an hour the night before last and it was an amazing conversation. The next day he had no contact with me, which in my mind it didn’t bother me and still kind of isn’t I think he just is doing his own thing and likes his personal space. I’m not too bothered or worried but still questioning why? Is it normal for a man to kinda disappear and have no contact for a day?

There is so much that is peculiar, irregular, silly, or downright twisted in mathematical verbiage that, certainly, we could all benefit from some soul-searching on the language of our culture. Some of mathematics usage is confusing (e. g. overuse of … Continue reading →

Over the last several years it has become clear that higher order assemblies on membranes, exemplified by signalosomes, are a paradigm for the regulation of many membrane signaling processes. We have recently combined two-color direct stochastic optical reconstruction microscopy (dSTORM) with the (Clus-DoC) algorithm that combines cluster detection and colocalization analysis to observe the organization of 5-lipoxygenase (5-LO) and 5-lipoxygenase–activating protein (FLAP) into higher order assemblies on the nuclear envelope of mast cells; these assemblies were linked to leukotriene (LT) C4 production. In this study we investigated whether higher order assemblies of 5-LO and FLAP included cytosolic phospholipase A2 (cPLA2) and were linked to LTB4 production in murine neutrophils. Using two- and three-color dSTORM supported by fluorescence lifetime imaging microscopy we identified higher order assemblies containing 40 molecules (median) (IQR: 23, 87) of 5-LO, and 53 molecules (62, 156) of FLAP monomer. 98 (18, 154) molecules of cPLA2 were clustered with 5-LO, and 77 (33, 114) molecules of cPLA2 were associated with FLAP. These assemblies were tightly linked to LTB4 formation. The activation-dependent close associations of cPLA2, FLAP, and 5-LO in higher order assemblies on the nuclear envelope support a model in which arachidonic acid is generated by cPLA2 in apposition to FLAP, facilitating its transfer to 5-LO to initiate LT synthesis.

Beets have strong detoxifying properties, as they are high in chlorine, which assists in the cleansing of the liver, kidneys and bloodstream. They are also rich in potassium, which balances the metabolism. The mighty beets nourish the blood, tonify the heart, calm the spirit and nervousness, and they lubricate the intestines and cleanse the liver! Oh my giddy Aunt!

AHP readers will be interested in a review article now available online from History of the Human Sciences “Within a single lifetime: Recent writings on autism.” Written by Gregory Hollin the piece reviews five recent books on autism.

A number of articles now in press at the Journal of the History of the Behavioral Sciences will be of interest to AHP readers. Full details below. “Uncovering the metaphysics of psychological warfare: The social science behind the Psychological Strategy Board’s operations planning, 1951–1953,” Gabrielle Kemmis. Abstract: In April 1951 president Harry S. Truman established … Continue reading Forthcoming in JHBS: Quêtelet on Deviance, McClelland on Leadership, Psychological Warfare, and More →

A 3.5 year mission from which they'll never return, a 2.5 million lightyear journey to another galaxy, 1.5 crew members comprising a solitary captain and a half-baked AI... Captain Sideris is a loner and knows LETO ships like nobody else, having risen to command the Lunar-Earth construction fleet, as they build ships to mine asteroids and colonize Mars. Suddenly he finds the colonization effort is for another planet, in another galaxy, and he's the sole human guinea pig being gated through a wormhole with an AI playing Noah to LETO SS Casindra's ark. Everything goes well as he starts to survey four planets they plan to exploit, as he gets to know emergent AI 'Al', as he discovers he's building a special relationship with empathic cat 'Simba'. Problem is message drones gated home are not being returned per protocol, with little explanation, no supplies, and some cryptic and disturbing messages. This full length novel is set in the multi-author multi-genre Paradisi universe. Casindra Lost opens the Lost Mission Series to explain what happened to some of the early missions that underlie the various colonization and post-colonization stories.

To evaluate bicycle passing distances in the Australian Capital Territory (ACT), specialised passing distance measurement devices (PDMDs) were installed on a sample of 23 cyclists who ride in the ACT. Passing distance data and GPS data was collected by cyclists using the PDMDs for a four week period, during a trial phase of a newly legislated minimum passing distance (MPD) rule The MPD rule requires drivers to provide more than 1 metre of space when passing a cyclist on a road with a speed limit of 60 km/h or below, and 1.5 meters of space when passing a cyclist on a road with a speed limit above 60 km/h.-- Abstract.

Air -- Pollution.

Men -- Australia -- Social conditions.

Women -- South Australia -- Biography.

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