K
Knut Johnsen
Researcher at University Hospital of North Norway
Publications - 12
Citations - 542
Knut Johnsen is an academic researcher from University Hospital of North Norway. The author has contributed to research in topics: Population & Ulcerative colitis. The author has an hindex of 7, co-authored 11 publications receiving 470 citations. Previous affiliations of Knut Johnsen include University of Tromsø.
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Journal ArticleDOI
A recent bottleneck of Y chromosome diversity coincides with a global change in culture
Monika Karmin,Monika Karmin,Lauri Saag,Lauri Saag,Mário Vicente,Melissa A. Wilson Sayres,Melissa A. Wilson Sayres,Mari Järve,Ulvi Gerst Talas,Siiri Rootsi,Anne-Mai Ilumäe,Anne-Mai Ilumäe,Reedik Mägi,Mario Mitt,Luca Pagani,Tarmo Puurand,Zuzana Faltyskova,Florian Clemente,Alexia Cardona,Ene Metspalu,Ene Metspalu,Hovhannes Sahakyan,Hovhannes Sahakyan,Bayazit Yunusbayev,Bayazit Yunusbayev,Georgi Hudjashov,Georgi Hudjashov,Michael DeGiorgio,Eva Liis Loogväli,Christina A. Eichstaedt,Mikk Eelmets,Mikk Eelmets,Gyaneshwer Chaubey,Kristiina Tambets,S. S. Litvinov,S. S. Litvinov,Maru Mormina,Yali Xue,Qasim Ayub,Grigor Zoraqi,Thorfinn Sand Korneliussen,Thorfinn Sand Korneliussen,Farida Akhatova,Farida Akhatova,Joseph Lachance,Joseph Lachance,Sarah A. Tishkoff,Kuvat T. Momynaliev,François-Xavier Ricaut,Pradiptajati Kusuma,Pradiptajati Kusuma,Harilanto Razafindrazaka,Denis Pierron,Murray P. Cox,Gazi Nurun Nahar Sultana,Rane Willerslev,Craig Muller,Michael C. Westaway,David M. Lambert,Vedrana Škaro,Lejla Kovacevic,Shahlo Turdikulova,Dilbar Dalimova,Rita Khusainova,Rita Khusainova,N. N. Trofimova,N. N. Trofimova,V. L. Akhmetova,I. M. Khidiyatova,I. M. Khidiyatova,Daria V. Lichman,Jainagul Isakova,Elvira Pocheshkhova,Zhaxylyk Sabitov,Zhaxylyk Sabitov,Nikolay A. Barashkov,Pagbajabyn Nymadawa,Evelin Mihailov,Joseph Wee Tien Seng,Irina Evseeva,Andrea Bamberg Migliano,S M Abdullah,George Andriadze,Dragan Primorac,L. A. Atramentova,Olga Utevska,Levon Yepiskoposyan,Damir Marjanović,Alena Kushniarevich,Alena Kushniarevich,Doron M. Behar,Christian Gilissen,Lisenka E.L.M. Vissers,Joris A. Veltman,Elena Balanovska,Miroslava Derenko,Boris Malyarchuk,Andres Metspalu,Sardana A. Fedorova,Anders Eriksson,Anders Eriksson,Andrea Manica,Fernando L. Mendez,Tatiana M. Karafet,Krishna R. Veeramah,Neil Bradman,Michael F. Hammer,Ludmila P. Osipova,Oleg Balanovsky,Elza Khusnutdinova,Elza Khusnutdinova,Knut Johnsen,Maido Remm,Mark G. Thomas,Chris Tyler-Smith,Peter A. Underhill,Eske Willerslev,Rasmus Nielsen,Mait Metspalu,Mait Metspalu,Richard Villems,Richard Villems,Richard Villems,Toomas Kivisild,Toomas Kivisild +124 more
TL;DR: A study of 456 geographically diverse high-coverage Y chromosome sequences, including 299 newly reported samples, infer a second strong bottleneck in Y-chromosome lineages dating to the last 10 ky, and hypothesize that this bottleneck is caused by cultural changes affecting variance of reproductive success among males.
Journal ArticleDOI
Interethnic difference in thiopurine methyltransferase activity.
B. Klemetsdal,Eva Tollefsen,Thrina Loennechen,Knut Johnsen,Egil Utsi,Kjell Gisholt,Erik Wist,Jarle Aarbakke +7 more
TL;DR: The higher red blood cell thiopurine methyltransferase activity in the Saami population group indicates that these subjects may require higher dosages of thiopirine drugs than Caucasians.
Journal ArticleDOI
Normalization of mucosal cytokine gene expression levels predicts long-term remission after discontinuation of anti-TNF therapy in Crohn's disease.
Renathe Rismo,Trine Olsen,Guanglin Cui,Eyvind J. Paulssen,Ingrid Christiansen,Knut Johnsen,Jon Florholmen,Rasmus Goll +7 more
TL;DR: Normalization of mucosal gene expression of cytokines after anti-TNF therapy does not occur in all patients with healed mucosa as judged by endoscopy, but normalization of TNF and/or IL17A expression predicts long-term remission.
Journal ArticleDOI
Acetabular dysplasia as an aetiological factor in development of hip osteoarthritis
TL;DR: In this middle-aged Sámi population, there is no evidence for the influence of AD on the development of hip OA and the logistic regression analyses did not show a significant association between AD and OA.
Journal ArticleDOI
Normalization of mucosal tumor necrosis factor-α: A new criterion for discontinuing infliximab therapy in ulcerative colitis.
Trine Olsen,Renathe Rismo,Mona Dixon Gundersen,Eyvind J. Paulssen,Knut Johnsen,Jan-Magnus Kvamme,Rasmus Goll,Jon Florholmen +7 more
TL;DR: Normalization of mucosal TNF predicts long-term remission after discontinuation of IFX, and mucosal expression levels of IL17A, IL23, IFNG, TGFB, IL6 did not predict long- term remission (>12months).