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Mediengestalter, Webdesigner, Grafikdesigner (Teilzeit)

Wir suchen Dich als Verstärkung für unser Team vor Ort in Bielefeld! Zu sofort und gerne in Teilzeit (unbefristet)! Selbstverständlich kannst Du nach entsprechender Einarbeitung auch ein bis zwei Tage in der Woche im Homeoffice arbeiten. Was wir von Dir als Mediendesigner*in / Webdesigner*in (m/w/d) erwarten: - Studium oder eine vergleichbare Ausbildung zum/zur Mediendesigner*in / Webdesigner*in / Grafiker*in (m/w/d) - Versierter Umgang mit der Adobe Creative Suite - Umfangreiche Erfahrung und sicherer… | screen concept – runge – Bielefeld




rafi

2016 Renault Trafic Business from UK and Ireland

Good work van; terrible main dealer, prices and staff...




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Interview with Hieromonk Serafim (Mendoza Segundo)

Aquí le ofrecemos algo mas para compartir en Glorificando a Dios. Comenzaremos con esta primera de lo que esperamos sean más entrevistas ocasionales en el futuro para compartir algo más sobre los acontecimientos de la Iglesia Ortodoxa en América Latina. Esta entrevista es con el Hieromonje Serafín (Mendoza Segundo) en México sobre la Iglesia Ortodoxa y su trabajo misionero en esa región. As an additional offering to Glorifying God, we will begin with this first of many occasional interviews so that we can share something more about the accomplishments of the Orthodox Church in Latin America. The following interview is with Hieromonk Serafim (Mendoza Segundo) in Mexico about the Orthodox Church and his missionary work in that region.




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Le changement climatique, facteur aggravant du trafic d'êtres humains

(Belga) La multiplication des désastres météorologiques, qui pousse sur les routes des millions de personnes, est aujourd'hui l'une des "causes principales" du trafic d'êtres humains, selon un rapport onusien publié mardi, évoquant également les risques posés par la guerre en Ukraine.

"Le changement climatique accroît la vulnérabilité au trafic", souligne cette étude de l'Office des Nations unies contre la drogue et le crime (ONUDC), basée sur la collecte des données de 141 pays sur la période 2017-2020 et l'analyse de 800 affaires judiciaires. Au fil du temps, "des régions entières vont devenir inhabitables", ce qui "affecte de manière disproportionnée" les communautés pauvres vivant essentiellement de l'agriculture ou de la pêche. Elles se retrouvent "privées de leurs moyens de subsistance et contraintes de fuir leur communauté", devenant une proie facile pour les trafiquants, a expliqué à la presse en amont de la publication Fabrizio Sarrica, auteur principal du texte. Rien qu'en 2021, les catastrophes climatiques ont provoqué le déplacement interne de plus de 23,7 millions de personnes, tandis que de nombreux autres ont dû partir à l'étranger. Le rapport cite des typhons dévastateurs aux Philippines, ou encore le Bangladesh, particulièrement exposé aux cyclones et tempêtes. Dans les deux pays, une hausse des cas de trafic a été constatée, avec par exemple l'organisation de "larges campagnes de recrutement" pour piéger dans le travail forcé les plus démunis. Le Ghana, victime de sécheresses et d'inondations, et la région des Caraïbes, soumise aux ouragans et à la montée du niveau de la mer, sont aussi en première ligne. Autre terrain propice au trafic, les conflits armés. Si l'Afrique est de loin le continent le plus touché, l'instance onusienne pointe une situation potentiellement "dangereuse" en Ukraine, tout en saluant les mesures prises par les pays de l'Union européenne pour accueillir et protéger les millions de réfugiés. (Belga)




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Malaysia monitoring developments in US for potential changes in policies: Rafizi

KUALA LUMPUR: Malaysia’s government is monitoring developments in the United States for potential changes in policies as a new administration prepares to take office in Washington, said Economy Minister Rafizi Ramli.

He said that given the influence the US has on the global economy, any country in the world would conduct some level of due diligence on the impacts a change in the US administration might bring.

“That is part and parcel of planning. While we await the next few announcements, we will observe how the Trump administration will impact the global economy and ours,” he told reporters after the Sesi Libat Urus Industri Rancangan Malaysia Ke-13 today.

Rafizi said Malaysia must be nimble and agile to react and respond to any geopolitical and international developments that may arise from a change in administration, not only in the US but in any of its large trading partners. “And the US is a very large trading partner for us,” he pointed out.

However, Rafizi noted that many of Malaysia’s plans concerning semiconductors and energy transition are driven by domestic needs and are largely structural. “That means it’s something we have to go through to prepare our industry and economy to be more robust. So in that sense, I think all the key reforms that need to be done still have to be done.”

Additionally, he said, Malaysia’s 13th Malaysia Plan will include initiatives to position the country as a global provider of a comprehensive artificial intelligence-driven data centre ecosystem. “The government’s focus has always been to tap into the opportunities presented by the data centre boom.”

Rafizi emphasised that Malaysia aims to avoid simply attracting data centre without integrating into the data centre value chain and supply chain. “We have been working on a few catalytic interventions to create the ecosystem.”

Rafizi said that by the end of this decade, Malaysia aims to participate in the entire data centre value chain, first benefiting from existing and future data centers in the country. “But more importantly, for us to begin exporting our own data centers around the world.”

For the 13th Malaysia Plan that is being prepared, Rafizi said, the Ministry of Economy is not only holding engagement sessions with state governments but also ensuring that it includes input from key strategic industries.

The sessions focus on the electronics, aerospace and automotive industries, and the process will continue to align government and industry planning. “The main goal is to transition our industries from assembly-based to innovation and creation-based industries,” Rafizi said.




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Aldo Serafini Presented with the Albert Nelson Marquis Lifetime Achievement Award by Marquis Who's Who

Aldo Serafini has been endorsed by Marquis Who's Who as a leader in the nuclear medicine field




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Azeem Rafiq racism case a ‘classic example of failure’

Natasha Adom weighs in on racism experienced by former cricket player Azeem Rafiq.

Personnel Today

View (Subscription required.)




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Tres traficantes detenidos por robar a punta de pistola en joyerías y tiendas de telefonía en Madrid

Los atracadores se dedicaban también al tráfico de drogas en varios pisos de Madrid Leer



  • Artículos Luis F. Durán

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Los sindicatos de la UJI critican que Puig 'derive' la "infrafinanciación" de la Comunidad Valenciana a la universidad pública

Exigen la aprobación del plan de Financiación de las universidades. «La infrafinanciación de la UJI supone una infrafinanciación para la provincia de Castellón», señalan Leer




rafi

Como Fotografiar el Eclipse Con un Smartphone

Antes de intentar fotografiar el eclipse con su smartphone, lea el consejo de estos expertos.

The post Como Fotografiar el Eclipse Con un Smartphone appeared first on Sky & Telescope.



  • Astrophotography: Tips & Techniques
  • Celestial Objects to Observe
  • Eclipses
  • Observar el Cielo
  • Observing
  • Resources and Education
  • The 2017 Total Solar Eclipse
  • The 2024 Total Solar Eclipse

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Ser hijo de Griselda me abrió y cerró puertas: Michael Corleone Blanco, hijo menor de narcotraficante

El hijo menor de la narcotraficante estuvo en Caracol Radio contando detalles de la vida de su madre




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Ejército reforzó Sumapaz ante grafitis alusivos a Segunda Marquetalia: secr. de seguridad

César Restrepo, secretario de Seguridad en Bogotá, advirtió sobre como esta la seguridad en esta zona.




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Zločin, korupce, prostitutky: Drsný New York 70. let zachycen na vzácných fotografiích

Ekonomická krize tehdy zasáhla celé Spojené státy, ale na New York dopadla s drtivou silou. Během let 1969 až 1974 přišlo v tomto městě o práci na půl milionu dělníků. Více jak milion domácností se tak stalo závislými na podpoře státu s mizernými vyhlídkami na jakékoliv zlepšení. 




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Thermal proteome profiling in zebrafish reveals effects of napabucasin on retinoic acid metabolism [Research]

Thermal proteome profiling (TPP) allows for the unbiased detection of drug – target protein engagements in vivo. Traditionally, one cell type is used for TPP studies, with the risk of missing important differentially expressed target proteins. The use of whole organisms would circumvent this problem. Zebrafish embryos are amenable to such an approach. Here, we used TPP on whole zebrafish embryo lysate to identify protein targets of napabucasin, a compound that may affect Signal transducer and activator of transcription 3 (Stat3) signaling through an ill-understood mechanism. In zebrafish embryos, napabucasin induced developmental defects consistent with inhibition of Stat3 signaling. TPP profiling showed no distinct shift in Stat3 upon napabucasin treatment, but effects were detected on the oxidoreductase, Pora, which might explain effects on Stat3 signaling. Interestingly, thermal stability of several aldehyde dehydrogenases (Aldhs) was affected. Moreover, napabucasin activated ALDH enzymatic activity in vitro. Aldhs have crucial roles in retinoic acid metabolism and functionally we validated napabucasin-mediated activation of the retinoic acid pathway in zebrafish in vivo. We conclude that TPP profiling in whole zebrafish embryo lysate is feasible and facilitates direct correlation of in vivo effects of small molecule drugs with their protein targets.




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Correction: Transcriptional factors Smad1 and Smad9 act redundantly to mediate zebrafish ventral specification downstream of Smad5. [Additions and Corrections]

VOLUME 289 (2014) PAGES 6604–6618In Fig. 4G, in the foxi1 panel, the images in Fig. 4G, i and l, corresponding to “smad1 MO” and “smad5 MO + samd1/9 mRNA” samples, respectively, were inadvertently reused during figure preparation. This error has now been corrected using images pertaining to each treatment and sample. This correction does not affect the results or conclusions of the work.jbc;295/52/18650/F4F1F4Figure 4G.




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Democracy is being tested. Citizen assemblies can help | Ketakandriana Rafitoson

How can everyday people help foster and protect democracy? Detailing her work fighting for people power as an activist in Madagascar, Ketakandriana Rafitoson discusses how citizen assemblies — meetings where ordinary citizens get educated about democracy — empower communities to protect their rights, debate important civic questions and take action to create a brighter future.




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[Developmental Biology] Glial Cell Development and Function in the Zebrafish Central Nervous System

Over the past decades the zebrafish has emerged as an excellent model organism with which to study the biology of all glial cell types in nervous system development, plasticity, and regeneration. In this review, which builds on the earlier work by Lyons and Talbot in 2015, we will summarize how the relative ease to manipulate the zebrafish genome and its suitability for intravital imaging have helped understand principles of glial cell biology with a focus on oligodendrocytes, microglia, and astrocytes. We will highlight recent findings on the diverse properties and functions of these glial cell types in the central nervous system and discuss open questions and future directions of the field.




rafi

Zebrafish Helps Assess Cryoprotectant Agents for Organ Preservation

medlinkZebrafish/medlink exhibits a crucial role in the fields of solid organ preservation and transplantation, especially with respect to experimental transplantation efforts.




rafi

Rechtsextrem: Biografien nach 1945 [Electronic book] / hrsg. von Gideon Botsch, Christoph Kopke, Karsten Wilke.

München ; Wien : De Gruyter Oldenbourg, [2023]




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Interspecies politics [Electronic book] : Nature, Borders, States / Rafi Youatt.

Ann Arbor : University of Michigan Press, 2020.




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Der montierte Fluss : Donaunarrative in Text, Film und Fotografie [Electronic book] / Anton Holzer.

[s.l.] : Franz Steiner Verlag, 2023.




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Intrafibrillar Calcium Carbonate Mineralization of Electrospinning Polyvinyl Alcohol/Collagen Films with Improved Mechanical and Bioactive Properties

J. Mater. Chem. B, 2024, Accepted Manuscript
DOI: 10.1039/D4TB01472C, Paper
Yin Liu, Xin Gao, Yuqi Li, Anqi Gao, Zhuozhi Zheng, Jingjiang Wei, Hongye Yang, Hang Ping, Hao Xie, Hao Wang, Weiming Wang, Zhengyi Fu
Collagen films play an essential role in guided bone regeneration (GBR) techniques, which creat space, promote cell adhesion, and induce osteogenic differentiation. It is therefore crucial to design appropriate GBR...
The content of this RSS Feed (c) The Royal Society of Chemistry




rafi

Ultrafine PtCo alloy nanoparticles integrated into porous N-doped nanosheets for durable oxygen reduction reaction

Chem. Commun., 2024, 60,13432-13435
DOI: 10.1039/D4CC04661G, Communication
Baoliang Chen, Lei Zhao, Zhaozhao Zhu, Pei Xiong, Zhao Li, Jun Song Chen, Lanlan Li, Rui Wu
The PtCo–CoNC–P catalyst, featuring sub-3 nm small-size PtCo alloy nanoparticles integrated into a porous nitrogen-doped nanosheet, exhibits exceptional durability after 30 000 cycles of accelerated durability tests.
The content of this RSS Feed (c) The Royal Society of Chemistry




rafi

Ultrafine VN quantum dots modified with a nitrogen-doped reduced graphene oxide anode material for enhanced rate capability and lifespan of lithium-ion batteries

New J. Chem., 2024, Advance Article
DOI: 10.1039/D4NJ00502C, Paper
Dong Wang, Zihan Guo, Zhiwei Wang, Yanfang Gao
The excellent electrochemistry performance is attributed to vanadium nitride quantum dots (VNQDs) offering large capacity and nitrogen-doped reduced graphene oxide (NrGO) acting as a conductive network and buffer skeleton.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry




rafi

Integrated microfluidic-based ultrafine water condensation particle counter (UWCPC) for monitoring of airborne nanoparticle generation and growth mechanisms

Environ. Sci.: Nano, 2024, Advance Article
DOI: 10.1039/D3EN00686G, Paper
Seong-Jae Yoo, Yong-Jun Kim
This study reports a newly developed condensation particle counter for nanoparticle source tracking, growth mechanism analysis, and wide area nanoparticle monitoring.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry




rafi

Functional silver-based nanomaterials affecting zebrafish development: the adverse outcomes in relation to the nanoparticle physical and chemical structure

Environ. Sci.: Nano, 2024, Accepted Manuscript
DOI: 10.1039/D3EN00813D, Paper
Open Access
Patrizia Bonfanti, Anita Colombo, Rossella Daniela Bengalli, Maurizio Gualtieri, Ilaria Zanoni, Magda Blosi, Anna Costa, Paride Mantecca
The growing demand for effective antimicrobials determined a significant increase of new nanoformulated materials to fight against bacteria and viruses, to be used in many industrial sectors including textiles, cosmetics,...
The content of this RSS Feed (c) The Royal Society of Chemistry




rafi

Nikolaĭ Ilʹin : "U men︠i︡a estʹ koe-kakie mysli otnositelʹno nabornoĭ oblozhki" / kniga Vladimira Krichevskogo o graficheskom oformlenii nizhegorodskoĭ pechati 20-x godov (XX veka) i vkrat︠t︡ce o tom, chto bylo potom.

Moskva : Samolet, 2000.




rafi

Autocomplete Interview - LE SSERAFIM Answer the Web's Most Searched Questions

LE SSERAFIM take the WIRED Autocomplete Interview and answer the internet's most searched questions about themselves. What is the LE SSERAFIM workout? Which member owned their Fearless era? Yunjin, Sakura, Kazuha, and Eunchae answer all these questions and much more!LE SSERAFIM's new English single Perfect Night is out now.Director: Katherine WzorekDirector of Photography: Francis BernalEditor: Paul TaelTalent: Eunchae, Kazuha, Sakura, YunjinLine Producer: Joseph BuscemiAssociate Producer: Brandon WhiteProduction Manager: D. Eric MartinezProduction Coordinator: Fernando DavilaTalent Booker: Lauren Mendoza, Jenna CaldwellCamera Operator: Cara Lehman, Jake RobbinsGaffer: Niklas MollerSound Mixer: Sean PaulsenProduction Assistant: Nicholas Sims, Quinton JohnsonTranslator: So Yun UmPost Production Supervisor: Alexa DeutschPost Production Coordinator: Ian BryantSupervising Editor: Doug LarsenAssistant Editor: Billy Ward




rafi

Revista da casa da geografia de Sobral [electronic journal].




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Mohammed Rafi and the rights of fictional characters




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Ultrafiltration behavior of CuO particles synthesized without and with different surfactants using PAN and PES membranes

Environ. Sci.: Water Res. Technol., 2024, 10,2981-2996
DOI: 10.1039/D4EW00462K, Paper
Olabimpe Genevieve Badru, Ime Akanyeti
Four different CuO particles were synthesized, with no surfactant (CuO/NS) and with three surfactants: Triton X-100 (CuO/TX100), cetyltrimethylammonium bromide (CuO/CTAB) and sodium dodecyl sulfate (CuO/SDS).
The content of this RSS Feed (c) The Royal Society of Chemistry




rafi

Investigation of the hypoglycemic bioactive components of Phyllanthi Fructus through biological assessment combined with ultrafiltration affinity mass spectrometry

Food Funct., 2024, Accepted Manuscript
DOI: 10.1039/D4FO04198D, Paper
Yifan Zhang, Qiang Yu, Peng Tan, Shimin Tian, Jun-zhi Lin, Mengqi Li, Li Han, Haozhou Huang, Ding-kun Zhang
Phyllanthi Fructus (PF) is a tropical fruit with the potential to effectively reduce postprandial blood glucose, making it highly promising for the development of functional foods. However, the lack of...
The content of this RSS Feed (c) The Royal Society of Chemistry




rafi

Why Lataji Didn't Sing With Rafi, SD...

Long before she won royalty rights for playback singers, there was an undisclosed incident in Lataji's life where she not only put a male colleague in place, but also refused to sing with him thereafter.




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Preceramic polymer hybridized phenolic aerogels and the derived ZrC/SiC/C ceramic aerogels with ultrafine nanocrystallines

Nanoscale, 2024, Accepted Manuscript
DOI: 10.1039/D4NR03470H, Paper
Ding Nie, Hangyu Zhong, Hongli Hu, Zhenhua Luo, Boxing Zhang
Phenolic and carbon aerogels have important applications for thermal insulation and ablative resistance materials in aerospace areas. However, their antioxidant ability in long-term and high-temperature aerobic environments is facing serious...
The content of this RSS Feed (c) The Royal Society of Chemistry




rafi

Copper regulates sleep in zebrafish

Metal may play sleep role through an enzyme responsible for synthesis of norepinephrine




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Mohmedjuned Mohmedrafik Shaikh vs State Of Gujarat on 8 May, 2020

MR. SOEB R. BHOHARIA for the PETITIONER(s) No. for the RESPONDENT(s) No. MR MITESH AMIN, PUBLIC PROSECUTOR with MR MANAN MEHTA, APP for the RESPONDENT(s) No. ========================================================== CORAM: HONOURABLE MR.JUSTICE R.M.CHHAYA and HONOURABLE MS. JUSTICE GITA GOPI Date : 08/05/2020 IA ORDER (PER : HONOURABLE MR.JUSTICE R.M.CHHAYA)

1. Rule. Learned Additional Public Prosecutor waives service of notice of Rule on behalf of respondent State.

2. Present application is preferred by the convict to release him on temporary bail for a period of 60 days on the grounds mentioned in the application.




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Die Telegrafie / Max Braun

Archives, Room Use Only - TK5262.B73 1948




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Lärobok i telegrafi / af J. Gunnar Holmström, civilingenjör, föreståndare för K. Telegrafverkets Undervisningsanstalt ; inledning: historik och del I Morses telegrafsystem

Archives, Room Use Only - TK5262.H65 1914




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Characterisation of ultrafine particles from a waste-incinerator plant

Ultrafine particles emitted from a waste incinerator plant in Italy have been characterised in a recent study. The results suggest that a fabric filter was efficient at cleaning particulate matter from the exhaust gases. Data produced by the study could go on to be used by scientists studying the potential health impacts of ultrafine particles.




rafi

Breakout Music Film & Media & Rafi Anteby Make Wishes Come True, Creating New Memories For Event Attendees Over The Weekend in Hollywood

Together, They Reminded Us That One Small Act of Kindness Creates A Domino Effect




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Tomotopigrafie. Modelli visivi per processi di topic modeling dinamico e gerarchico.

In the information overload age, the user needs to find... more




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designworkplan zoekt per direct wayfinding grafisch ontwerper

designworkplan zoekt per direct een grafisch ontwerper voor onze wayfinding studio in Amsterdam




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Process for producing intertwined ultrafine filament sheet

A method of producing an entangled sheet of microfine long fibers using long fibers for forming microfine fibers. The method includes a step of forming a long-fiber web made of long fibers for forming microfine fibers, at least one component of the long fibers being a water-soluble, thermoplastic polyvinyl alcohol resin; a step of entangling the long-fiber web to form a long-fiber entangled sheet; a step of shrinking the long-fiber entangled sheet to form a long-fiber shrunk sheet; and a step of converting the long fibers for forming microfine fibers in the long-fiber shrunk sheet to microfine long fibers, thereby producing the entangled sheet of microfine long fibers. The step of entangling is conducted so as to allow the long-fiber entangled sheet to have an interlaminar peel strength of 2 kg/2.5 cm or more. The step of shrinking is conducted so as to shrink in an areal shrinkage of 35% or more.




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METHODS FOR PRODUCING ULTRAFINE FIBER AND ULTRAFINE FIBER-CONTAINING SHEET, SHEET OBTAINED THEREBY, AND RESIN COMPOSITE COMPRISING LAMINATED RESINS

An object of the present invention is to provide a method for producing an ultrafine fiber-containing sheet with suppressed yellowing. Another object of the present invention is to provide an efficient method for eliminating an introduced substituent, and a composite sheet comprising an organic layer and/or an inorganic layer laminated on the obtained sheet. The present invention provides a method for producing an ultrafine fiber-containing sheet, comprising (a) introducing a substituent having electrostatic and/or steric functionality to a fiber raw material to obtain substituent-introduced fiber; (b) machine-processing the substituent-introduced fiber obtained in the step (a) to obtain substituent-introduced ultrafine fiber; (c) preparing a sheet from the substituent-introduced ultrafine fiber obtained in the step (b); and (d) eliminating at least a portion of introduced substituents from the sheet obtained in the step (c). In a preferred aspect, the substituent having electrostatic and/or steric functionality is a phosphoric acid-derived group, and the method may further comprise, after the step (a) and before the step (c), the step of (e) changing the degree of neutralization of the substituent-introduced fiber or the substituent-introduced ultrafine fiber.




rafi

„Fotografie ist eine einsame Kunst“

Der Dokumentarfotograf Steve McCurry reist seit mehr als 40 Jahren durch die Welt. Jeder kennt sein „afghanisches Mädchen“. Nun gewährt eine visuelle Biografie den bislang persönlichsten Einblick in sein Schaffen.




rafi

Serafina Steer - The Moths Are Real

An artist harder to define, and more brilliant, than you might imagine.




rafi

Grafilo v. Wolfsohn

(California Court of Appeal) - Held that a pain management physician did not have to produce the medical records of five of his patients pursuant to a subpoena issued by an investigator with the Medical Board of California, because the board did not establish good cause for the subpoena. Reversed the decision below, in this case involving prescriptions for controlled substances.




rafi

Prominins control ciliary length throughout the animal kingdom: New lessons from human prominin-1 and zebrafish prominin-3 [Cell Biology]

Prominins (proms) are transmembrane glycoproteins conserved throughout the animal kingdom. They are associated with plasma membrane protrusions, such as primary cilia, as well as extracellular vesicles derived thereof. Primary cilia host numerous signaling pathways affected in diseases known as ciliopathies. Human PROM1 (CD133) is detected in both somatic and cancer stem cells and is also expressed in terminally differentiated epithelial and photoreceptor cells. Genetic mutations in the PROM1 gene result in retinal degeneration by impairing the proper formation of the outer segment of photoreceptors, a modified cilium. Here, we investigated the impact of proms on two distinct examples of ciliogenesis. First, we demonstrate that the overexpression of a dominant-negative mutant variant of human PROM1 (i.e. mutation Y819F/Y828F) significantly decreases ciliary length in Madin–Darby canine kidney cells. These results contrast strongly to the previously observed enhancing effect of WT PROM1 on ciliary length. Mechanistically, the mutation impeded the interaction of PROM1 with ADP-ribosylation factor–like protein 13B, a key regulator of ciliary length. Second, we observed that in vivo knockdown of prom3 in zebrafish alters the number and length of monocilia in the Kupffer's vesicle, resulting in molecular and anatomical defects in the left-right asymmetry. These distinct loss-of-function approaches in two biological systems reveal that prom proteins are critical for the integrity and function of cilia. Our data provide new insights into ciliogenesis and might be of particular interest for investigations of the etiologies of ciliopathies.




rafi

Math in the Media - May 2020:John Conway, "magical mathematician", Topological analysis of zebrafish, teaching online...




rafi

Prominins control ciliary length throughout the animal kingdom: New lessons from human prominin-1 and zebrafish prominin-3 [Cell Biology]

Prominins (proms) are transmembrane glycoproteins conserved throughout the animal kingdom. They are associated with plasma membrane protrusions, such as primary cilia, as well as extracellular vesicles derived thereof. Primary cilia host numerous signaling pathways affected in diseases known as ciliopathies. Human PROM1 (CD133) is detected in both somatic and cancer stem cells and is also expressed in terminally differentiated epithelial and photoreceptor cells. Genetic mutations in the PROM1 gene result in retinal degeneration by impairing the proper formation of the outer segment of photoreceptors, a modified cilium. Here, we investigated the impact of proms on two distinct examples of ciliogenesis. First, we demonstrate that the overexpression of a dominant-negative mutant variant of human PROM1 (i.e. mutation Y819F/Y828F) significantly decreases ciliary length in Madin–Darby canine kidney cells. These results contrast strongly to the previously observed enhancing effect of WT PROM1 on ciliary length. Mechanistically, the mutation impeded the interaction of PROM1 with ADP-ribosylation factor–like protein 13B, a key regulator of ciliary length. Second, we observed that in vivo knockdown of prom3 in zebrafish alters the number and length of monocilia in the Kupffer's vesicle, resulting in molecular and anatomical defects in the left-right asymmetry. These distinct loss-of-function approaches in two biological systems reveal that prom proteins are critical for the integrity and function of cilia. Our data provide new insights into ciliogenesis and might be of particular interest for investigations of the etiologies of ciliopathies.