Johanna Pijnenborg

Johanna Pijnenborg

orcid

Research Focus & Metrics

Academic Career Length

28Years (1999-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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7 January 2019 in Marine Drugs
Verified
Journal Article
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GWGeert Van Weelden
Geert Van Weelden
MBMarcin Bobiński
Marcin Bobiński
KOKarolina Okła
Karolina Okła
WWWillem Jan Van Weelden
Willem Jan Van Weelden
Andrea RomanoAndrea Romano
Andrea Romano
JPJohanna Pijnenborg
Johanna Pijnenborg
Fucoidan is a natural derived compound found in different species of brown algae and in some animals, that has gained attention for its anticancer properties. However, the exact mechanism of action is currently unknown. Therefore, this review will address fucoidans structure, the bioavailability, and all known different pathways affected by fucoidan, in order to formulate fucoidans structure and activity in relation to its anti-cancer mechanisms. The general bioactivity of fucoidan is difficult to establish due to factors like species-related structural diversity, growth conditions, and the extraction method. The main pathways influenced by fucoidan are the PI3K/AKT, the MAPK pathway, and the caspase pathway. PTEN seems to be important in the fucoidan-mediated effect on the AKT pathway. Furthermore, the interaction with VEGF, BMP, TGF-β, and estrogen receptors are discussed. Also, fucoidan as an adjunct seems to have beneficial effects, for both the enhanced effectiveness of chemotherapy and reduced toxicity in healthy cells. In conclusion, the multipotent character of fucoidan is promising in future anti-cancer treatment. However, there is a need for more specified studies of the structure–activity relationship of fucoidan from the most promising seaweed species.


29 July 2015 in BJOG: An International Journal of Obstetrics & Gynaecology
Verified
Journal Article
Closed access
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JMJf Van der Meulen
Jf Van der Meulen
JPJohanna Pijnenborg
Johanna Pijnenborg
CBCm Boomsma
Cm Boomsma
MVMfg Verberg
Mfg Verberg
PGPmaj Geomini
Pmaj Geomini
MBMy Bongers
My Bongers

7 February 2015 in Gynecological Surgery
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Journal Article
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HBHans Brölmann
Hans Brölmann
VTVasilios Tanos
Vasilios Tanos
GGGrigoris Grimbizis
Grigoris Grimbizis
TIThomas Ind
Thomas Ind
KPKevin Philips
Kevin Philips
OMOn behalf of the European Society of Gynaecological Endoscopy (ESGE) steering committee on fibroid morcellation
On behalf of the European Society of Gynaecological Endoscopy (ESGE) steering committee on fibroid morcellation
In laparoscopy, specimens have to be removed from the abdominal cavity. If the trocar opening or the vaginal outlet is insufficient to pass the specimen, the specimen needs to be reduced. The power morcellator is an instrument with a fast rotating cylindrical knife which aims to divide the tissue into smaller pieces or fragments. The Food and Drug Administration (FDA) issued a press release in April 2014 that discouraged the use of these power morcellators. This article has the objective to review the literature related to complications by power morcellation of uterine fibroids in laparoscopy and offer recommendations to laparoscopic surgeons in gynaecology. This project was initiated by the executive board of the European Society of Gynaecological Endoscopy. A steering committee on fibroid morcellation was installed and experienced ESGE members requested to chair an action group to address distinct clinical questions. Clinical questions were formulated with regards to the sarcoma risk in presumed uterine fibroids, diagnosis of sarcoma, complications of morcellation and future research. A literature review on the different subjects was conducted, systematic if appropriate and feasible. It was concluded that the true prevalence of uterine sarcoma in presumed fibroids is not known given the wide range of prevalences (0.45–0.014 %) from meta-analyses mainly based on retrospective trials. Age and certain imaging characteristics such as ‘lacunes’ suggesting necrosis and increased central vascularisation of the tumour are associated with a higher risk of uterine sarcoma, although the risks remain low. There is not enough evidence to estimate this risk in individual patients. Complications of morcellation are rare. Reported are direct morcellation injuries to vessels and bowel, the development of so-called parasitic fibroids requiring reintervention and the spread of sarcoma cells in the abdominal cavity, which may possibly or even likely upstaging the disease. Momentarily in-bag morcellation is investigated as it may possibly prevent morcellation complications. Because of lack of evidence, this literature review cannot give strong recommendations but offers only options which are condensed in a flow chart. Prospective data collection may clarify the issue on sarcoma risk in presumed fibroids and technology to extract tissue laparoscopically from the abdominal cavity should be perfected.

1 November 2015 in Journal of Clinical Oncology
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KNKim A.H. Nicolaije
Kim A.H. Nicolaije
NENicole P.M. Ezendam
Nicole P.M. Ezendam
MVM. Caroline Vos
M. Caroline Vos
JPJohanna Pijnenborg
Johanna Pijnenborg
DBDorry Boll
Dorry Boll
LPLonneke V. van de Poll-Franse
Lonneke V. van de Poll-Franse
Purpose This study was conducted to longitudinally assess the impact of an automatically generated survivorship care plan (SCP) on patient-reported outcomes in routine clinical practice. Primary outcomes were patient satisfaction with information and care. Secondary outcomes included illness perceptions and health care use. Methods Twelve hospitals were randomly assigned to SCP care or usual care in a pragmatic, cluster randomized trial. Newly diagnosed patients with endometrial cancer completed questionnaires after diagnosis (n = 221; 75% response), 6 months (n = 158), and 12 months (n = 147). An SCP application was built in the Web-based ROGY (Registration System Oncological Gynecology). By clicking the SCP button, a patient-tailored SCP was generated. Results In the SCP care arm, 74% of patients received an SCP. They reported receiving more information about their treatment (mean [M] = 57, standard deviation [SD] = 20 v M = 47, SD = 24; P = .03), other services (M = 35, SD = 22 v M = 25, SD = 22; P = .03), and different places of care (M = 27, SD = 25 v M = 23, SD = 26; P = .04) than the usual care arm (scales, 0 to 100). However, there were no differences regarding satisfaction with information or care. Patients in the SCP care arm experienced more symptoms (M = 3.3, SD = 2.0 v M = 2.6, SD = 1.6; P = .03), were more concerned about their illness (M = 4.4, SD = 2.3 v M = 3.9, SD = 2.1; P = .03), were more affected emotionally (M = 4.0, SD = 2.2 v M = 3.7, SD = 2.2; P = .046), and reported more cancer-related contact with their primary care physician (M = 1.8, SD = 2.0 v M = 1.1, SD = 0.9; P = .003) than those in the usual care arm (scale, 1 to 10). These effects did not differ over time. Conclusion The present trial showed no evidence of a benefit of SCPs on satisfaction with information and care. Furthermore, SCPs increased patients' concerns, emotional impact, experienced symptoms, and the amount of cancer-related contact with the primary care physician. Whether this may ultimately lead to more empowered patients should be investigated further.

22 November 2021 in Cancers
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JKJenneke Kasius
Jenneke Kasius
JPJohanna Pijnenborg
Johanna Pijnenborg
KLKristina Lindemann
Kristina Lindemann
DFDavid Forsse
David Forsse
JZJudith van Zwol
Judith van Zwol
FAFrédéric Amant
Frédéric Amant
Endometrial cancer (EC) is the most common gynaecologic malignancy in developed countries. The main challenge in EC management is to correctly estimate the risk of metastases at diagnosis and the risk to develop recurrences in the future. Risk stratification determines the need for surgical staging and adjuvant treatment. Detection of occult, microscopic metastases upstages patients, provides important prognostic information and guides adjuvant treatment. The molecular classification subdivides EC into four prognostic subgroups: POLE ultramutated; mismatch repair deficient (MMRd); nonspecific molecular profile (NSMP); and TP53 mutated (p53abn). How surgical staging should be adjusted based on preoperative molecular profiling is currently unknown. Moreover, little is known whether and how other known prognostic biomarkers affect prognosis prediction independent of or in addition to these molecular subgroups. This review summarizes the factors incorporated in surgical staging (i.e., peritoneal washing, lymph node dissection, omentectomy and peritoneal biopsies), and its impact on prognosis and adjuvant treatment decisions in an era of molecular classification of EC. Moreover, the relation between FIGO stage and molecular classification is evaluated including the current gaps in knowledge and future perspectives.