Noting they are “aware of a video clip of the firearms incident” which occurred on Court Street this weekend being circulated on social media, the police said ”sharing these images could hamper that investigation” and urged people to please not share it. A police spokesperson said, “The Bermuda Police Service is aware of a video clip of the […]

The Coast Guard handled two separate jet ski accidents late last month, including a collision with a boat and a collision between two jet skis. A Bermuda Maritime Operations Centre [BMOC] spokesperson said, “On Monday 26th August at 6:30pm, Bermuda Radio was advised by Fire Dispatch that an ambulance had been requested as a jet […]

“This was a heinous and cowardly act of violence directed at our police officers last night,” Minister of National Security Michael Weeks said. Minister Weeks said, “We are grateful that no one was hurt during this dangerous incident. This is a threat to law and order, and we must all do our part to bring the […]

The Bermuda Police Service said they are “aware of a social media message being circulated, reporting a firearms incident had taken place at TCD this morning” noted that it was untrue. A police spokesperson said, “The Bermuda Police Service is aware of a social media message being circulated, reporting a firearms incident had taken place at […]

[Updated] “This is not the first time that officers have been shot at. But this is the first time, that in performance of their duty, BPS officers have discharged lethal weapons at another person,” the police said following the recent firearm incident Commissioner of Police Darrin Simons said, “Shortly after midnight on Saturday, August 24, 2024, […]

The police are investigating a stabbing incident which resulted in a 25-year-old man being injured. A police spokesperson said, “Shortly after 10:00 p.m. on Saturday, September 21, 2024, Police attended a report of a male at the King Edward VII Memorial Hospital [KEMH], seeking treatment for an apparent stab wound. “On arrival, officers spoke with […]

The Bermuda Police Service thanked the public for their assistance with the investigation into the recent shooting, and appealed for more information as the investigation continues. A police spokesperson said, “The Bermuda Police Service wishes to thank those members of the public who have so far come forward in relation to the firearms incident which occurred […]

In two separate incidents, a 35-year-old man “suffered a suspected stab wound to the upper torso,” and a 52-year-old man was reportedly assaulted with a machete. A police spokesperson said, “Shortly before 1:00am on Sunday, October 13, 2024, police responded to a reported assault at the Zen Lounge, Somerset Road, Sandys Parish. Upon arrival, officers were […]

An 18-year-old was charged in Magistrates Court today [May 25] in connection with the firearm incident at Divots earlier this month. ZBM reported that Josiah King was charged with counts including carrying a firearm in a public place, possession of a firearm and possessing ammunition. He was not required to enter a plea as the […]

Před 55 lety zveřejnila nezávislá tisková agentura Dispatch News Service reportáž o vyšetřování incidentu v jihovietnamském městě My Lai. Díky práci reportéra Seymoura Hershe se celý svět dozvěděl o zločinu jednotek US Army, které pod vedením poručíka Williama L. Calleyho zavraždily během průzkumné akce stovky civilních obyvatel. Reportáž znamenala obrat ve vedení vietnamské války, v jejím vnímání americkou i světovou veřejností. Hersh se tak zařadil mezi elitní novináře, jejichž práce změnila světové dějiny.

„Až bude Anežka svatořečena, bude v Čechách konečně dobře,“ prohlásil 12. listopadu 1989, tedy přesně před 35 lety, Tomáš Halík ve vatikánském chrámu svatého Petra. Starou věštbu tehdy připomněl tisícům českých poutníků, kteří se na obřad sloužený papežem Janem Pavlem II. dostávali složitě přes zadrátované hranice. Pět dnů nato ale začala sametová revoluce a všechno bylo jinak. Proč musela česká světice na svatořečení tak dlouho čekat a jak v příběhu figurovali husité, kněz jménem Papoušek, chromá věštkyně a řádová sestra s páčidlem v ruce?

In light of a recent series of fires in high-rise buildings with combustible facades, including the Grenfell tower fire, the National Fire Protection Association (NFPA) has initiated a project to develop a fire risk assessment tool for these types of buildings to assist local authorities globally with fire safety in their communities.

Fire chiefs from France, the United Kingdom, and the United States gathered in Quincy, Massachusetts at the National Fire Protection Association (NFPA) Urban Fire Forum (UFF) to listen to first-hand accounts of some of the biggest emergency response incidents over the past 15 months, including hurricane response in Texas and Florida, the Grenfell Tower fire in London, and the Pulse Nightclub shooting in Orlando.

By Keegan Kelly Published: November 12th, 2024

Shabbat Shalom yeah, since you've been gone we kinda moved away from that whole "Jewish" thing. But I was gone for like 3 days

Behavioral analytics, long associated with threat detection (i.e. UEBA or UBA), is experiencing a renaissance. Once primarily used to identify suspicious activity, it’s now being reimagined as a powerful post-detection technology that enhances incident response processes. By leveraging behavioral insights during alert triage and investigation, SOCs can transform their workflows to become more

While participating in a Zoom conference with other members of the New Hampshire Firearms Safety Coalition, of which I’ve been a proud member for a quarter century or so, I was reminded that I have not addressed here a topic NHFSC has strongly and successfully focused upon: suicide prevention. The organization was founded by the […]

November's nycdevops meetup speaker is John Allspaw, who will give a talk titled "Findings From the Field: 2 Years of Learning From Incidents".

The talk starts at 5pm sharp! (NY is in US/Eastern)

Please RSVP! See you there!

https://www.meetup.com/nycdevops/events/273826675/

(This is a virtual meetup. Everyone in the world is invited!)

Don't forget!

November's nycdevops meetup speaker is John Allspaw, who will give a talk titled "Findings From the Field: 2 Years of Learning From Incidents".

The talk starts at 5pm sharp! (NY is in US/Eastern)

Please RSVP! See you there!

https://www.meetup.com/nycdevops/events/273826675/

(This is a virtual meetup. Everyone in the world is invited!)

Mohamed Bin Salman was speaking at the opening of a summit of Muslim and Arab leaders in Riyadh.

A friend of the New York Republican said September's accident left him paralysed from the chest down.

Israel's parliament, the Knesset, has suspended lawmaker Ofer Cassif for six months due to comments he made about the IDF, the war in Gaza, and his support for South Africa accusing his country of genocide against Palestinians.

"This is really weird, maybe, but I had really heavy breasts. They were like 10 pounds when they removed them," Kathy Bates said on a podcast.

Jon Stewart tears apart the denials and false claims Trump supporters make about their terrible candidate and wonders how anyone can remain undecided.

At the top of this piece by Stewart sits the strange claim MAGAs keep making that Vice President Harris isn't clear about her plans. — Read the rest

The post Jon Stewart on the bewildering denial in remaining an undecided voter appeared first on Boing Boing.

The following article, Lunatic Democrat Murders Wife and Kids, Commits Suicide Over His Hate for Donald Trump, was first published on Conservative Firing Line.

This is how mentally deranged liberals are… a Democrat in Minnesota was so filled with rage that Donald Trump won the election last week that he murdered his own wife and kids and then committed suicide to prevent them all from having to live during the next Trump presidency. Notice how you never heard any …

Continue reading Lunatic Democrat Murders Wife and Kids, Commits Suicide Over His Hate for Donald Trump ...

Introducing Instapaper 4.0 for iPad and iPhone

The lede here is that my pal, Marco, has just released the stellar new 4.0 version of his Instapaper suite.

This is fantastic news, and–as if you needed one more of Marco’s beta testers to say so–I do sincerely hope you’ll mark the occasion (and support his hard work) by purchasing the Instapaper iOS app(s). I promise you’ll be treating yourself to a massive update to an already excellent product.

Now, it’s fortunate and appropriate that you’ll be hearing this advice at length from a lot of people this week. Because, if it’s not already obvious, Marco’s little app (and its associated services) enjoys a rabid fanbase of sundry paragraph cultists who are as eager as I am to spread the word; and, yes, we do want you to join the Reading Nerd cult.

But, I also want to mark the occasion by adding a few thoughts on exactly what Instapaper has done, and continues to do, for me. (As you may already know, I’m a big Marco fan.)

Thing is, I want to tell you how Marco has made a magical machine for people who have decided to read.

Long-Time Fan

For years, Instapaper has been one of the best made, most used, and most beloved apps in my iOS ecosystem. It’s always lived on my iPhone’s home page, and, as you can surmise, that’s because I use Instapaper a lot. Like, a lot a lot. Specifically, I use Instapaper a lot because it helps me do four things extremely well. Four things that work together to make my life a little better.

In that typically annoying mixed order I can’t seem to stop doing, here goes.

2. Deciding WHEN to read

Second, and most obviously, I use Instapaper maybe five to ten times a day to catch up on my reading. Which is great. This is what Instapaper is actually for, right? You read stuff.

Long articles, smaller features, short books, big piles of documentation, and really just anything that I would like to read…later. More saliently, these are things that I have decided to read. This decision part’s important, but more on that in a couple minutes.

But, how does all this “stuff” I’ve decided to read get in to Instapaper?

1. Deciding WHAT to read

See, this is the really important first part. Because as much as I use Instapaper for all manner of reading, its use as an ephemeral destination for mostly ephemeral content wouldn’t be nearly so useful if I didn’t have so many ways to collect all that stuff. So, that flexibility in collecting material is where I end up using some form of Instapaper dozens of times each day.

Examples?

I have a bookmarklet for adding items to Instapaper in 4 browsers on 7 devices. I have (and use the hell out of) the “Send to Instapaper” services that are built in to everything from Google Reader to Reeder to Flipboard to Instacast to Tweetbot to Zite to you name it. I can automate in or out of Instapaper with If This Then That, I can email items directly to Instapaper–hell, I can even just copy a URL from iOS Safari, and paste it directly into the motherscratching Instapaper app.

Suffice it to say, there are many ways to get “stuff” into Instapaper. E.g.:

But, that banner dump only tells part of the story.

Yes, a big part of this is about ubiquity and ease-of-use. But, the practical result is that all those little entrees to Instapaper are available to me everywhere I might need them, and they each represent a single little click that silently adds an item of “stuff” to my Instapaper pile.

Each button is one more simple opportunity for me to decide to read.

3. Deciding WHERE to read

Now, the third part of this magic is less immediately obvious, not least because the reading experience of the Instapaper iOS apps is, for my own purposes, perfect. But, there’s more.

Because, all that support for getting stuff into Instapaper is mirrored by an endless number of ways to get stuff back out. To, in fact, read. That thing I decided to read is now everywhere.

However I ended up deciding to read something, seconds after that *click*, the real magic starts happening, and–through whatever inscrutable black art and transmogrification is happening inside the fearsome celestial engine Marco has made–that decision to read is expressed in the most elegant of results and in a startlingly broad variety of convenient places.

It’s readable on a website; it’s readable on an iPhone, and 2 iPads; it’s readable on a Kindle 3; it’s readable on the crazy number of apps and services that display Instapaper items. And, it’s even preserved for posterity in my private Pinboard archive.

So, for practical purposes, this stuff that I’ve decided to read can now go whooshing through a network of customized tubes, and gently land practically anywhere that well-formed bits may reside.

4. Just…Deciding to Read

I know most of you know these things. I know you’re familiar with the many “Features and Benefits” of Instapaper. And, I even know that most of you reading this are probably already using Instapaper–perhaps even to read this very article.

So, the point here is not simply that Instapaper is flexible, idiot-proof, and sanity-savingly redundant. Although it is all those things and many more.

The point is that my life always gets better when I decide to read things–and then actually read those things I decided to read. This is not a trivial point.

We’re all busy, and we’re all bombarded with 10,000 potential calls on our attention every day. Some days, we handle that better than others. Some days, we don’t handle it all.

All I know, is that, throughout my life, deciding to read has made that life better.

It made my life better at 7 with Henry Huggins. It made my life better at 16 with Slaughterhouse-Five. It made my life better at 20 with Absalom, Absalom!. And, it made my life way better at 25 with A Confederacy of Dunces (cf.).

And, now, for the past few years–following over a decade during which I read way more href tags than actual prose paragraphs–my life has gotten better, in part, due to Instapaper. I’ve finally gotten my hands around this “too much stuff” issue, at least insofar as it relates to words of theoretical interest. Now, I know where it goes. It goes into Instapaper.

Because, now? Yeah. Twenty-some years after a college career sucking down over 1,000 pages a week, I am finally returning to reading a lot more. Because, I am deciding to read a lot more. Instapaper means there’s no excuse for not reading a lot more. Period.

How about you?

What Are YOU Deciding?

When you’re in line at the ATM or the professional sporting event, what do you do?

If you’re like a lot of people, you hit your mobile device like a pigeon on a goddamned pellet. Then, you decide what happens.

You can decide to throw birds at pigs. You can decide to check in on which strangers are pretending to like you today. You may even decide to see what you would look like if you were really fat.

Thing is, you could also decide to read. Just for a couple minutes. Maybe more. Maybe less. Who knows. It’s your decision.

A Nudge Towards “Better”

But, if you have followed the circuitous skeins of yarn comprising this little sweater you’ve been reading, it comes down to this:

If you’ve decided that you want to read, Marco’s app will really help you. He’s removed any phony barriers you’ve built about “not having time” or “not having it with you” or “not knowing where to put it.” There are no excuses, apart from the superficial animated ones you’ve constructed out of cartoon birds.

As for me? In the last week alone, I decided to read a lot of things in Instapaper. A small sampling:

I decided to read about an American family’s educational experiment in Russia.

I decided to read about what Heidegger means by Being-in-the-World.

I decided to read about why toasters are so bad.

I decided to read about responsive web design.

I decided to read about why Charlie Kaufman wrote Being John Malkovich.

I decided to read about how Open Data could make San Francisco Public Transportation better.

I decided to read about how John Siracusa remembers Steve Jobs.

I decided, and then I read. I read, and I read.

So, thanks, Marco. You’ve made my life better by making it easier to decide to read. Then, you made it way easier to do the actual reading.

And, to you–the kind readers-of-prose-paragraphs who were inexplicably patient enough to decide to read this long article–please consider supporting Marco’s work.

Please get an account at Instapaper and, if you have an iOS dingus, please do buy the Instapaper app.

In addition to having exquisite taste in app icons and a lovely speaking voice, Marco’s just a very good human. And, good humans more than deserve our support.

Buy Instapaper 4.0 by Marco Arment.

Shao-En Ong
May 1, 2002; 1:376-386
Research

James M. Ntambi
Sep 1, 1999; 40:1549-1558
Reviews

Margrit Schwarz
Sep 1, 1998; 39:1833-1843
Articles

Jorge H. Capdevila
Feb 1, 2000; 41:163-181
Reviews

James E. Balmer
Nov 1, 2002; 43:1773-1808
Reviews

Gijs den Besten
Sep 1, 2013; 54:2325-2340
Reviews

K Schoonjans
May 1, 1996; 37:907-925
Reviews

William R. Morrison
Oct 1, 1964; 5:600-608
Articles

Highly engineered phytases, which sequentially hydrolyze the hexakisphosphate ester of inositol known as phytic acid, are routinely added to the feeds of monogastric animals to improve phosphate bioavailability. New phytases are sought as starting points to further optimize the rate and extent of dephosphorylation of phytate in the animal digestive tract. Multiple inositol polyphosphate phosphatases (MINPPs) are clade 2 histidine phosphatases (HP2P) able to carry out the stepwise hydrolysis of phytate. MINPPs are not restricted by a strong positional specificity making them attractive targets for development as feed enzymes. Here, we describe the characterization of a MINPP from the Gram-positive bacterium Bifidobacterium longum (BlMINPP). BlMINPP has a typical HP2P-fold but, unusually, possesses a large α-domain polypeptide insertion relative to other MINPPs. This insertion, termed the U-loop, spans the active site and contributes to substrate specificity pockets underpopulated in other HP2Ps. Mutagenesis of U-loop residues reveals its contribution to enzyme kinetics and thermostability. Moreover, four crystal structures of the protein along the catalytic cycle capture, for the first time in an HP2P, a large ligand-driven α-domain motion essential to allow substrate access to the active site. This motion recruits residues both downstream of a molecular hinge and on the U-loop to participate in specificity subsites, and mutagenesis identified a mobile lysine residue as a key determinant of positional specificity of the enzyme. Taken together, these data provide important new insights to the factors determining stability, substrate recognition, and the structural mechanism of hydrolysis in this industrially important group of enzymes.

Sirtuin 6, SIRT6, is critical for both glucose and lipid homeostasis and is involved in maintaining genomic stability under conditions of oxidative DNA damage such as those observed in age-related diseases. There is an intense search for modulators of SIRT6 activity, however, not many specific activators have been reported. Long acyl-chain fatty acids have been shown to increase the weak in vitro deacetylase activity of SIRT6 but this effect is modest at best. Herein we report that electrophilic nitro-fatty acids (nitro-oleic acid and nitro-conjugated linoleic acid) potently activate SIRT6. Binding of the nitro-fatty acid to the hydrophobic crevice of the SIRT6 active site exerted a moderate activation (2-fold at 20 μm), similar to that previously reported for non-nitrated fatty acids. However, covalent Michael adduct formation with Cys-18, a residue present at the N terminus of SIRT6 but absent from other isoforms, induced a conformational change that resulted in a much stronger activation (40-fold at 20 μm). Molecular modeling of the resulting Michael adduct suggested stabilization of the co-substrate and acyl-binding loops as a possible additional mechanism of SIRT6 activation by the nitro-fatty acid. Importantly, treatment of cells with nitro-oleic acid promoted H3K9 deacetylation, whereas oleic acid had no effect. Altogether, our results show that nitrated fatty acids can be considered a valuable tool for specific SIRT6 activation, and that SIRT6 should be considered as a molecular target for in vivo actions of these anti-inflammatory nitro-lipids.

In addition to their well-known role in the control of cellular proliferation and cancer, cell cycle regulators are increasingly identified as important metabolic modulators. Several GWAS have identified SNPs near CDKN2A, the locus encoding for p16INK4a (p16), associated with elevated risk for cardiovascular diseases and type-2 diabetes development, two pathologies associated with impaired hepatic lipid metabolism. Although p16 was recently shown to control hepatic glucose homeostasis, it is unknown whether p16 also controls hepatic lipid metabolism. Using a combination of in vivo and in vitro approaches, we found that p16 modulates fasting-induced hepatic fatty acid oxidation (FAO) and lipid droplet accumulation. In primary hepatocytes, p16-deficiency was associated with elevated expression of genes involved in fatty acid catabolism. These transcriptional changes led to increased FAO and were associated with enhanced activation of PPARα through a mechanism requiring the catalytic AMPKα2 subunit and SIRT1, two known activators of PPARα. By contrast, p16 overexpression was associated with triglyceride accumulation and increased lipid droplet numbers in vitro, and decreased ketogenesis and hepatic mitochondrial activity in vivo. Finally, gene expression analysis of liver samples from obese patients revealed a negative correlation between CDKN2A expression and PPARA and its target genes. Our findings demonstrate that p16 represses hepatic lipid catabolism during fasting and may thus participate in the preservation of metabolic flexibility.

Oxygen regulates hypoxia-inducible factor (HIF) transcription factors to control cell metabolism, erythrogenesis, and angiogenesis. Whereas much has been elucidated about how oxygen regulates HIF, whether lipids affect HIF activity is un-known. Here, using cultured cells and two animal models, we demonstrate that lipoprotein-derived fatty acids are an independent regulator of HIF. Decreasing extracellular lipid supply inhibited HIF prolyl hydroxylation, leading to accumulation of the HIFα subunit of these heterodimeric transcription factors comparable with hypoxia with activation of downstream target genes. The addition of fatty acids to culture medium suppressed this signal, which required an intact mitochondrial respiratory chain. Mechanistically, fatty acids and oxygen are distinct signals integrated to control HIF activity. Finally, we observed lipid signaling to HIF and changes in target gene expression in developing zebrafish and adult mice, and this pathway operates in cancer cells from a range of tissues. This study identifies fatty acids as a physiological modulator of HIF, defining a mechanism for lipoprotein regulation that functions in parallel to oxygen.

Toma Keser
Dec 29, 2020; 0:RA120.002433v1-mcp.RA120.002433
Research

Philipp Emanuel Geyer
Dec 17, 2020; 0:RA120.002359v1-mcp.RA120.002359
Research

Elisa Vidal
Dec 1, 2020; 61:1733-1746
Research Articles

Photoreceptors have high energy-demands and a high density of mitochondria that produce adenosine triphosphate (ATP) through oxidative phosphorylation (OXPHOS) of fuel substrates. Although glucose is the major fuel for central nervous system (CNS) brain neurons, in photoreceptors (also CNS), most glucose is not metabolized through OXPHOS but is instead metabolized into lactate by aerobic glycolysis. The major fuel sources for photoreceptor mitochondria remained unclear for almost six decades. Similar to other tissues (like heart and skeletal muscle) with high metabolic rates, photoreceptors were recently found to metabolize fatty acids (palmitate) through OXPHOS. Disruption of lipid entry into photoreceptors leads to extracellular lipid accumulation, suppressed glucose transporter expression, and a duel lipid/glucose fuel shortage. Modulation of lipid metabolism helps restore photoreceptor function. However, further elucidation of the types of lipids used as retinal energy sources, the metabolic interaction with other fuel pathways, as well as the crosstalk among retinal cells to provide energy to photoreceptors is not yet known. In this review, we will focus on the current understanding of photoreceptor energy demand and sources, and potential future investigations of photoreceptor metabolism.

Bile acids (BAs) have been established as ubiquitous regulatory molecules implicated in a large variety of healthy and pathological processes. However, the scope of BA heterogeneity is often underrepresented in current literature. This is due in part to inadequate detection methods, which fail to distinguish the individual constituents of the BA pool. Thus, the primary aim of this study was to develop a method that would allow the simultaneous analysis of specific C24 BA species, and to apply that method to biological systems of interest. Herein, we describe the generation and validation of an LC-MS/MS assay for quantification of numerous BAs in a variety of cell systems and relevant biofluids and tissue. These studies included the first baseline level assessment for planar BAs, including allocholic acid, in cell lines, biofluids, and tissue in a nonhuman primate (NHP) laboratory animal, Macaca mulatta, in healthy conditions. These results indicate that immortalized cell lines make poor models for the study of BA synthesis and metabolism, whereas human primary hepatocytes represent a promising alternative model system. We also characterized the BA pool of M. mulatta in detail. Our results support the use of NHP models for the study of BA metabolism and pathology in lieu of murine models. Moreover, the method developed here can be applied to the study of common and planar C24 BA species in other systems.

Bile acids, which are synthesized from cholesterol by the liver, are chemically transformed along the intestinal tract by the gut microbiota, and the products of these transformations signal through host receptors, affecting overall host health. These transformations include bile acid deconjugation, oxidation, and 7α-dehydroxylation. An understanding of the biogeography of bile acid transformations in the gut is critical because deconjugation is a prerequisite for 7α-dehydroxylation and because most gut microorganisms harbor bile acid transformation capacity. Here, we used a coupled metabolomic and metaproteomic approach to probe in vivo activity of the gut microbial community in a gnotobiotic mouse model. Results revealed the involvement of Clostridium scindens in 7α-dehydroxylation, of the genera Muribaculum and Bacteroides in deconjugation, and of six additional organisms in oxidation (the genera Clostridium, Muribaculum, Bacteroides, Bifidobacterium, Acutalibacter, and Akkermansia). Furthermore, the bile acid profile in mice with a more complex microbiota, a dysbiosed microbiota, or no microbiota was considered. For instance, conventional mice harbor a large diversity of bile acids, but treatment with an antibiotic such as clindamycin results in the complete inhibition of 7α-dehydroxylation, underscoring the strong inhibition of organisms that are capable of carrying out this process by this compound. Finally, a comparison of the hepatic bile acid pool size as a function of microbiota revealed that a reduced microbiota affects host signaling but not necessarily bile acid synthesis. In this study, bile acid transformations were mapped to the associated active microorganisms, offering a systematic characterization of the relationship between microbiota and bile acid composition.

Spatial changes of FAs in the retina in response to different dietary n-3 formulations have never been explored, although a diet rich in EPA and DHA is recommended to protect the retina against the effects of aging. In this study, Wistar rats were fed for 8 weeks with balanced diet including either EPA-containing phospholipids (PLs), EPA-containing TGs, DHA-containing PLs, or DHA-containing TGs. Qualitative changes in FA composition of plasma, erythrocytes, and retina were evaluated by gas chromatography-flame ionization detector. Following the different dietary intakes, changes to the quantity and spatial organization of PC and PE species in retina were determined by LC coupled to MS/MS and MALDI coupled to MS imaging. The omega-3 content in the lipids of plasma and erythrocytes suggests that PLs as well as TGs are good omega-3 carriers for retina. However, a significant increase in DHA content in retina was observed, especially molecular species as di-DHA-containing PC and PE, as well as an increase in very long chain PUFAs (more than 28 carbons) following PL-EPA and TG-DHA diets only. All supplemented diets triggered spatial organization changes of DHA in the photoreceptor layer around the optic nerve. Taken together, these findings suggest that dietary omega-3 supplementation can modify the content of FAs in the rat retina.

SLC19A2 and SLC19A3, also known as thiamine transporters (THTR) 1 and 2, respectively, transport the positively charged thiamine (vitamin B1) into cells to enable its efficient utilization. SLC19A2 and SLC19A3 are also known to transport structurally unrelated cationic drugs, such as metformin, but whether this charge selectivity extends to other molecules, such as pyridoxine (vitamin B6), is unknown. We tested this possibility using Madin-Darby canine kidney II (MDCKII) cells and human embryonic kidney 293 (HEK293) cells for transfection experiments, and also using Caco-2 cells as human intestinal epithelial model cells. The stable expression of SLC19A2 and SLC19A3 in MDCKII cells (as well as their transient expression in HEK293 cells) led to a significant induction in pyridoxine uptake at pH 5.5 compared with control cells. The induced uptake was pH-dependent, favoring acidic conditions over neutral to basic conditions, and protonophore-sensitive. It was saturable as a function of pyridoxine concentration, with an apparent Km of 37.8 and 18.5 μm, for SLC19A2 and SLC19A3, respectively, and inhibited by the pyridoxine analogs pyridoxal and pyridoxamine as well as thiamine. We also found that silencing the endogenous SLC19A3, but not SLC19A2, of Caco-2 cells with gene-specific siRNAs lead to a significant reduction in carrier-mediated pyridoxine uptake. These results show that SLC19A2 and SLC19A3 are capable of recognizing/transporting pyridoxine, favoring acidic conditions for operation, and suggest a possible role for these transporters in pyridoxine transport mainly in tissues with an acidic environment like the small intestine, which has an acidic surface microclimate.

Ankylosing Spondylitis (AS) is a common, inflammatory rheumatic disease, which primarily affects the axial skeleton and is associated with sacroiliitis, uveitis and enthesitis. Unlike other autoimmune rheumatic diseases, such as rheumatoid arthritis or systemic lupus erythematosus, autoantibodies have not yet been reported to be a feature of AS. We therefore wished to determine if plasma from patients with AS contained autoantibodies and if so, characterize and quantify this response in comparison to patients with Rheumatoid Arthritis (RA) and healthy controls. Two high-density nucleic acid programmable protein arrays expressing a total of 3498 proteins were screened with plasma from 25 patients with AS, 17 with RA and 25 healthy controls. Autoantigens identified were subjected to Ingenuity Pathway Analysis in order to determine patterns of signalling cascades or tissue origin. 44% of patients with Ankylosing Spondylitis demonstrated a broad autoantibody response, as compared to 33% of patients with RA and only 8% of healthy controls. Individuals with AS demonstrated autoantibody responses to shared autoantigens, and 60% of autoantigens identified in the AS cohort were restricted to that group. The AS patients autoantibody responses were targeted towards connective, skeletal and muscular tissue, unlike those of RA patients or healthy controls. Thus, patients with AS show evidence of systemic humoral autoimmunity and multispecific autoantibody production. Nucleic Acid Programmable Protein Arrays constitute a powerful tool to study autoimmune diseases.