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Stefansson, Kristina
Publications (10 of 10) Show all publications
Stefansson, K., Oda, H., Öfverman, C., Lundin, E., Hedman, H. & Lindquist, D. (2019). LRIG1‑2 and LMO7 immunoreactivity in vulvar squamous cell carcinoma: association with prognosis in relation to HPV‑DNA and p16INK4a status. Oncology Reports, 42(1), 142-150
Open this publication in new window or tab >>LRIG1‑2 and LMO7 immunoreactivity in vulvar squamous cell carcinoma: association with prognosis in relation to HPV‑DNA and p16INK4a status
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2019 (English)In: Oncology Reports, ISSN 1021-335X, E-ISSN 1791-2431, Vol. 42, no 1, p. 142-150Article in journal (Refereed) Published
Abstract [en]

The present study was conducted to investigate the possible prognostic value of molecular markers LRIG1‑2 and LIM domain 7 protein (LMO7) in vulvar squamous cell carcinoma (VSCC) and their possible correlation to human papilloma virus (HPV)‑ and p16INK4a‑status of the tumors. Patients diagnosed with VSCC at the University Hospital of Umeå, Sweden, during the years 1990‑2013 were selected. Tumor blocks were retrieved from tissue archives and clinical data were collected from the records of patients. HPV‑PCR analysis, HPV genotyping and immunohistochemistry were performed. In total, 112 patients were included. Forty percent of the tumors were HPV‑positive, 27% were p16INK4a‑positive and 23% were positive for both HPV and p16INK4a (considered HPV‑driven). HPV‑positivity and p16INK4a‑positivity were associated with prolonged disease‑free survival (DFS) in Kaplan‑Meier survival analysis. Leucine‑rich repeats and immunoglobulin‑like domains 1 (LRIG1) immunoreactivity was not significantly associated with survival. High leucine‑rich repeats and immunoglobulin‑like domains 2 (LRIG2) immunoreactivity was associated with a prolonged overall survival (OS) (P=0.001). By analyzing HPV‑negative cases only, it was determined that high LRIG2 immunoreactivity was associated with both favorable OS (P=0.008) and DFS (P=0.031). LRIG2 immunoreactivity was also an independent prognostic factor in multivariate analysis of OS (P=0.002, HR=0.41; 95% CI, 0.24‑0.71). High immunoreactivity with LMO7‑1250 antibody was associated with survival benefits in the whole cohort (OS; P=0.011) although DFS was only prolonged in HPV‑negative and not HPV‑driven tumors (P=0.038 and 0.042, respectively). The present study indicated that LRIG2 and LMO7 may be useful prognostic markers in VSCC, particularly for patients without HPV‑driven tumors or with advanced tumors at diagnosis. In contrast to earlier observations regarding other types of squamous cell carcinoma, LRIG1 was not a significant prognostic factor in VSCC.

Place, publisher, year, edition, pages
Spandidos Publications, 2019
Keywords
vulvar squamous cell carcinoma, leucine‑rich repeats and immunoglobulin‑like domains, human papillomavirus, p16INK4a, survival
National Category
Cancer and Oncology
Research subject
health services research
Identifiers
urn:nbn:se:umu:diva-159681 (URN)10.3892/or.2019.7138 (DOI)31059071 (PubMedID)
Available from: 2019-06-03 Created: 2019-06-03 Last updated: 2019-06-05Bibliographically approved
Ofverman, C., Stefansson, K., Ottander, U. & Lindquist, D. (2016). CASE SERIES OF PATIENTS WITH LEIOMYOSARCOMA OF THE UTERUS TREATED WITH TRABECTEDIN IN NORTHERN SWEDEN. International Journal of Gynecological Cancer, 26(Supplement 3), 1046-1046, Article ID IGCS-0142.
Open this publication in new window or tab >>CASE SERIES OF PATIENTS WITH LEIOMYOSARCOMA OF THE UTERUS TREATED WITH TRABECTEDIN IN NORTHERN SWEDEN
2016 (English)In: International Journal of Gynecological Cancer, ISSN 1048-891X, E-ISSN 1525-1438, Vol. 26, no Supplement 3, p. 1046-1046, article id IGCS-0142Article in journal, Meeting abstract (Refereed) Published
National Category
Obstetrics, Gynecology and Reproductive Medicine
Identifiers
urn:nbn:se:umu:diva-128468 (URN)000387109100886 ()
Available from: 2017-06-22 Created: 2017-06-22 Last updated: 2018-06-09Bibliographically approved
Loizou, C., Laurell, G., Lindquist, D., Öfverman, C., Stefansson, K., Nylander, K. & Olofsson, K. (2015). Incidence of tonsillar cancer in northern Sweden: Impact of human papilloma virus. Oncology Letters, 10(6), 3565-3572
Open this publication in new window or tab >>Incidence of tonsillar cancer in northern Sweden: Impact of human papilloma virus
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2015 (English)In: Oncology Letters, ISSN 1792-1074, E-ISSN 1792-1082, Vol. 10, no 6, p. 3565-3572Article in journal (Refereed) Published
Abstract [en]

The incidence rate of tonsillar cancer is increasing worldwide. The current study identifies a parallel increase in the incidence of tonsillar cancer, human papilloma virus (HPV) and p16 expression among a population from northern Sweden, a sparsely populated area, confirming the strong association between p16 and HPV infection in tonsillar tissue. Data from the Swedish Cancer Registry was assessed to identify cases of tonsillar cancer in the northern territorial area of Sweden. HPV DNA was extracted from paraffin embedded diagnostic biopsies and detected by polymerase chain reaction using general primers Gp5+/6+ and CpI/IIG. Expression of p16 was identified by immunochemistry. Patients were grouped into urban or rural residence categories. A total of 214 cases were identified, comprising 155 (72.4%) men and 59 (27.6%) women, and 65 of these patients, who presented between 2000 and 2012, were analyzed. The overall median age for the analyzed patients was 58 years; 48 (74%) were males (median age, 57.5 years) and 17 (26%) were females (median age, 65 years). Of the 65 specimens, 59 (91%) were positive for HPV, and 62 (95%) expressed p16. The incidence of tonsillar cancer in the cohort demonstrated a 2-fold increase between 1990 and 2013; specifically, a 2.7-fold increase was observed in men whilst the female group exhibited only a small increase. These findings demonstrate a strong association between p16 expression and HPV infection in tonsillar malignancies. The incidence of HPV-positive tonsillar cancer has increased in recent years, even in sparsely populated regions, as demonstrated in northern Sweden.

Place, publisher, year, edition, pages
Spandidos Publications, 2015
Keywords
head and neck cancer, human papilloma virus, immunohistochemistry, incidence, p16, tonsillar cancer
National Category
Cancer and Oncology Otorhinolaryngology
Identifiers
urn:nbn:se:umu:diva-114586 (URN)10.3892/ol.2015.3775 (DOI)000367232600038 ()
Available from: 2016-02-16 Created: 2016-01-25 Last updated: 2018-06-07Bibliographically approved
Stefansson, K., Oda, H., Öfverman, C., Lundin, E., Hedman, H. & Lindquist, D. (2015). LRIG protein expression and HPV prevalence in vulvar cancer patients in northern Sweden. International Journal of Gynecological Cancer, 25(9), 684-684
Open this publication in new window or tab >>LRIG protein expression and HPV prevalence in vulvar cancer patients in northern Sweden
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2015 (English)In: International Journal of Gynecological Cancer, ISSN 1048-891X, E-ISSN 1525-1438, Vol. 25, no 9, p. 684-684Article in journal, Meeting abstract (Other academic) Published
National Category
Cancer and Oncology
Identifiers
urn:nbn:se:umu:diva-123480 (URN)000377145702004 ()
Available from: 2016-07-06 Created: 2016-07-04 Last updated: 2018-06-07Bibliographically approved
Lindquist, D., Öfverman, C., Stefansson, K. & Aglund, K. (2015). Survival-data for endometrial cancer patients in northern Sweden 2010-2011. International Journal of Gynecological Cancer, 25(9), 1100-1100
Open this publication in new window or tab >>Survival-data for endometrial cancer patients in northern Sweden 2010-2011
2015 (English)In: International Journal of Gynecological Cancer, ISSN 1048-891X, E-ISSN 1525-1438, Vol. 25, no 9, p. 1100-1100Article in journal, Meeting abstract (Other academic) Published
National Category
Cancer and Oncology
Identifiers
urn:nbn:se:umu:diva-123479 (URN)000377145703060 ()
Available from: 2016-07-06 Created: 2016-07-04 Last updated: 2018-06-07Bibliographically approved
Lindquist, D., Ranhem, C., Stefansson, K., Hellman, K. & Andersson, S. (2014). PREVALENCE OF HPV-POSITIVE VAGINAL AND VULVAR CANCER OVER TIME IN TWO SWEDISH COHORTS. International Journal of Gynecological Cancer, 24(9 suppl 4), 892-892
Open this publication in new window or tab >>PREVALENCE OF HPV-POSITIVE VAGINAL AND VULVAR CANCER OVER TIME IN TWO SWEDISH COHORTS
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2014 (English)In: International Journal of Gynecological Cancer, ISSN 1048-891X, E-ISSN 1525-1438, Vol. 24, no 9 suppl 4, p. 892-892Article in journal, Meeting abstract (Other academic) Published
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:umu:diva-98580 (URN)000344966501227 ()
Available from: 2015-01-26 Created: 2015-01-23 Last updated: 2018-06-07Bibliographically approved
Brattsand, M., Stefansson, K., Hubiche, T., Nilsson, S. K. & Egelrud, T. (2009). SPINK9: a selective, skin-specific Kazal-type serine protease inhibitor.. Journal of Investigative Dermatology, 129(7), 1656-1665
Open this publication in new window or tab >>SPINK9: a selective, skin-specific Kazal-type serine protease inhibitor.
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2009 (English)In: Journal of Investigative Dermatology, ISSN 0022-202X, E-ISSN 1523-1747, Vol. 129, no 7, p. 1656-1665Article in journal (Refereed) Published
Abstract [en]

A previously unreported Kazal-type serine protease inhibitor, serine protease inhibitor Kazal type 9 (SPINK9), was identified in human skin. SPINK9 expression was strong in palmar epidermis, but not detectable or very low in non palmoplantar skin. Analysis of a human cDNA panel showed intermediate expression in thymus, pancreas, liver, and brain, and low or undetectable expression in other tissues. Using kallikrein-related peptidases (KLKs) 5, 7, 8, and 14, thrombin, trypsin, and chymotrypsin, inhibition with recombinant SPINK9 was seen only for KLK5 using low molecular weight substrates, with an apparent K(i) of 65 nM. Also KLK5 degradation of fibrinogen was totally inhibited by SPINK9. Slight inhibition of KLK8 using fibrinogen substrate could be observed using high concentrations of SPINK9. Analyses by surface plasmon resonance showed heterogeneous binding to SPINK9 of KLK5 and KLK8, but no binding of KLK7 or KLK14. KLK5 has been suggested to play a central role in skin desquamation as an initiating activating enzyme in proteolytic cascades formed by KLKs. An apparently KLK5-specific inhibitor, such as SPINK9, may play a significant regulatory role in such cascades. We suggest a possible role for SPINK9 in the site-specific epidermal differentiation of palms and soles.

Place, publisher, year, edition, pages
Nature Publishing Group, 2009
National Category
Dermatology and Venereal Diseases
Identifiers
urn:nbn:se:umu:diva-35834 (URN)10.1038/jid.2008.448 (DOI)19194479 (PubMedID)
Available from: 2010-09-07 Created: 2010-09-07 Last updated: 2018-06-08Bibliographically approved
Stefansson, K., Brattsand, M., Roosterman, D., Kempkes, C., Bocheva, G., Steinhoff, M. & Egelrud, T. (2008). Activation of proteinase-activated receptor-2 by human kallikrein-related peptidases. Journal of Investigative Dermatology, 128(1), 18-25
Open this publication in new window or tab >>Activation of proteinase-activated receptor-2 by human kallikrein-related peptidases
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2008 (English)In: Journal of Investigative Dermatology, ISSN 0022-202X, E-ISSN 1523-1747, Vol. 128, no 1, p. 18-25Article in journal (Refereed) Published
Abstract [en]

Proteinase-activated receptor-2 (PAR2) is a seven transmembrane spanning, G-protein-coupled receptor, present on the membrane of many cell types including keratinocytes. In skin, PAR2 is suggested to play a regulatory role during inflammation, epidermal barrier function, and pruritus. PAR2 is activated by trypsin-like proteases by a unique mechanism where cleavage of the receptor leads to the release of a small peptide, which activates the receptor as a tethered ligand. The endogenous activators of PAR2 on keratinocytes have not been identified as of yet. Potential candidates are kallikrein-related peptidases (KLKs) expressed by epidermal cells. Therefore, the ability of four human skin-derived KLKs was examined with regard to their capacity to activate PAR2 in vitro. PAR2 cleavage was followed by immunofluorescence analysis and functional activation by measurements of changes in intracellular calcium levels. We found that KLK5 and KLK14, but neither KLK7 nor KLK8, induced PAR2 signalling. We conclude that certain, but not all, epidermal KLKs are capable of activating PAR2. We could also show the coexpression of KLK14 and PAR2 receptor in inflammatory skin disorders. These in vitro results suggest that KLKs may take part in PAR2 activation in the epidermis and thereby in PAR2-mediated inflammatory responses, including epidermal barrier repair and pruritus. The role of KLKs in PAR2 activation in vivo remains to be elucidated.

Place, publisher, year, edition, pages
Elsevier, 2008
Identifiers
urn:nbn:se:umu:diva-7000 (URN)10.1038/sj.jid.5700965 (DOI)000251613600005 ()17625593 (PubMedID)
Available from: 2008-01-02 Created: 2008-01-02 Last updated: 2019-07-08Bibliographically approved
Stefansson, K., Brattsand, M., Ny, A., Glas, B. & Egelrud, T. (2006). Kallikrein-related peptidase 14 may be a major contributor to trypsin-like proteolytic activity in human stratum corneum.. Biological chemistry (Print), 387(6), 761-768
Open this publication in new window or tab >>Kallikrein-related peptidase 14 may be a major contributor to trypsin-like proteolytic activity in human stratum corneum.
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2006 (English)In: Biological chemistry (Print), ISSN 1431-6730, E-ISSN 1437-4315, Vol. 387, no 6, p. 761-768Article in journal (Refereed) Published
Keywords
Epidermis/*enzymology, Humans, Kallikreins/analysis/isolation & purification/*metabolism, Serine Endopeptidases/metabolism, Skin Physiology, Sweat Glands/enzymology, Trypsin/*metabolism
Identifiers
urn:nbn:se:umu:diva-6060 (URN)doi:10.1515/BC.2006.095 (DOI)16800737 (PubMedID)
Available from: 2008-01-07 Created: 2008-01-07 Last updated: 2018-06-09Bibliographically approved
Brattsand, M., Stefansson, K., Lundh, C., Haasum, Y. & Egelrud, T. (2005). A proteolytic cascade of kallikreins in the stratum corneum. Journal of Investigative Dermatology, 124(1), 198-203
Open this publication in new window or tab >>A proteolytic cascade of kallikreins in the stratum corneum
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2005 (English)In: Journal of Investigative Dermatology, ISSN 0022-202X, E-ISSN 1523-1747, Vol. 124, no 1, p. 198-203Article in journal (Refereed) Published
Identifiers
urn:nbn:se:umu:diva-3178 (URN)10.1111/j.0022-202X.2004.23547.x (DOI)
Available from: 2008-05-12 Created: 2008-05-12 Last updated: 2018-06-09Bibliographically approved
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