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Jens Randel Nyengaard

Infertility in the hyperplasic ovary of freshwater planarians: the role of programmed cell death

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Standard

Infertility in the hyperplasic ovary of freshwater planarians : the role of programmed cell death. / Harrath, Abdel Halim; Semlali, Abdelhabib; Mansour, Lamjed; Ahmed, Mukhtar; Sirotkin, Alexander V; Al Omar, Suliman Y; Arfah, Maha; Al Anazi, Mohamed S; Alhazza, Ibrahim M; Nyengaard, Jens R; Alwasel, Saleh.

In: Cell and Tissue Research, 09.08.2014.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

Harrath, AH, Semlali, A, Mansour, L, Ahmed, M, Sirotkin, AV, Al Omar, SY, Arfah, M, Al Anazi, MS, Alhazza, IM, Nyengaard, JR & Alwasel, S 2014, 'Infertility in the hyperplasic ovary of freshwater planarians: the role of programmed cell death', Cell and Tissue Research. https://doi.org/10.1007/s00441-014-1971-0

APA

Harrath, A. H., Semlali, A., Mansour, L., Ahmed, M., Sirotkin, A. V., Al Omar, S. Y., Arfah, M., Al Anazi, M. S., Alhazza, I. M., Nyengaard, J. R., & Alwasel, S. (2014). Infertility in the hyperplasic ovary of freshwater planarians: the role of programmed cell death. Cell and Tissue Research. https://doi.org/10.1007/s00441-014-1971-0

CBE

Harrath AH, Semlali A, Mansour L, Ahmed M, Sirotkin AV, Al Omar SY, Arfah M, Al Anazi MS, Alhazza IM, Nyengaard JR, Alwasel S. 2014. Infertility in the hyperplasic ovary of freshwater planarians: the role of programmed cell death. Cell and Tissue Research. https://doi.org/10.1007/s00441-014-1971-0

MLA

Vancouver

Harrath AH, Semlali A, Mansour L, Ahmed M, Sirotkin AV, Al Omar SY et al. Infertility in the hyperplasic ovary of freshwater planarians: the role of programmed cell death. Cell and Tissue Research. 2014 Aug 9. https://doi.org/10.1007/s00441-014-1971-0

Author

Harrath, Abdel Halim ; Semlali, Abdelhabib ; Mansour, Lamjed ; Ahmed, Mukhtar ; Sirotkin, Alexander V ; Al Omar, Suliman Y ; Arfah, Maha ; Al Anazi, Mohamed S ; Alhazza, Ibrahim M ; Nyengaard, Jens R ; Alwasel, Saleh. / Infertility in the hyperplasic ovary of freshwater planarians : the role of programmed cell death. In: Cell and Tissue Research. 2014.

Bibtex

@article{7abd019b035947f7ac12e3befed96737,
title = "Infertility in the hyperplasic ovary of freshwater planarians: the role of programmed cell death",
abstract = "Ex-fissiparous planarians produce infertile cocoons or, in very rare cases, cocoons with very low fertility. Here, we describe the features of programmed cell death (PCD) occurring in the hyperplasic ovary of the ex-fissiparous freshwater planarian Dugesia arabica that may explain this infertility. Based on TEM results, we demonstrate a novel extensive co-clustering of cytoplasmic organelles, such as lysosomes and microtubules, and their fusion with autophagosomes during the early stage of oocyte cell death occurring through an autophagic pattern. During a later stage of cell death, the generation of apoptotic vesicles in the cytoplasm can be observed. The immunohistochemical labeling supports the ultrastructural results because it has been shown that the proapoptotic protein bax was more highly expressed in the hyperplasic ovary than in the normal one, whereas the anti-apoptotic protein bcl2 was slightly more highly expressed in the normal ovary compared to the hyperplasic one. TUNEL analysis of the hyperplasic ovary confirmed that the nuclei of the majority of differentiating oocytes were TUNEL-positive, whereas the nuclei of oogonia and young oocytes were TUNEL-negative; in the normal ovary, oocytes are TUNEL-negative. Considering all of these data, we suggest that the cell death mechanism of differentiating oocytes in the hyperplasic ovary of freshwater planarians is one of the most important factors that cause ex-fissiparous planarian infertility. We propose that autophagy precedes apoptosis during oogenesis, whereas apoptotic features can be observed later.",
author = "Harrath, {Abdel Halim} and Abdelhabib Semlali and Lamjed Mansour and Mukhtar Ahmed and Sirotkin, {Alexander V} and {Al Omar}, {Suliman Y} and Maha Arfah and {Al Anazi}, {Mohamed S} and Alhazza, {Ibrahim M} and Nyengaard, {Jens R} and Saleh Alwasel",
year = "2014",
month = aug,
day = "9",
doi = "10.1007/s00441-014-1971-0",
language = "English",
journal = "Cell and Tissue Research",
issn = "0302-766X",
publisher = "Springer",

}

RIS

TY - JOUR

T1 - Infertility in the hyperplasic ovary of freshwater planarians

T2 - the role of programmed cell death

AU - Harrath, Abdel Halim

AU - Semlali, Abdelhabib

AU - Mansour, Lamjed

AU - Ahmed, Mukhtar

AU - Sirotkin, Alexander V

AU - Al Omar, Suliman Y

AU - Arfah, Maha

AU - Al Anazi, Mohamed S

AU - Alhazza, Ibrahim M

AU - Nyengaard, Jens R

AU - Alwasel, Saleh

PY - 2014/8/9

Y1 - 2014/8/9

N2 - Ex-fissiparous planarians produce infertile cocoons or, in very rare cases, cocoons with very low fertility. Here, we describe the features of programmed cell death (PCD) occurring in the hyperplasic ovary of the ex-fissiparous freshwater planarian Dugesia arabica that may explain this infertility. Based on TEM results, we demonstrate a novel extensive co-clustering of cytoplasmic organelles, such as lysosomes and microtubules, and their fusion with autophagosomes during the early stage of oocyte cell death occurring through an autophagic pattern. During a later stage of cell death, the generation of apoptotic vesicles in the cytoplasm can be observed. The immunohistochemical labeling supports the ultrastructural results because it has been shown that the proapoptotic protein bax was more highly expressed in the hyperplasic ovary than in the normal one, whereas the anti-apoptotic protein bcl2 was slightly more highly expressed in the normal ovary compared to the hyperplasic one. TUNEL analysis of the hyperplasic ovary confirmed that the nuclei of the majority of differentiating oocytes were TUNEL-positive, whereas the nuclei of oogonia and young oocytes were TUNEL-negative; in the normal ovary, oocytes are TUNEL-negative. Considering all of these data, we suggest that the cell death mechanism of differentiating oocytes in the hyperplasic ovary of freshwater planarians is one of the most important factors that cause ex-fissiparous planarian infertility. We propose that autophagy precedes apoptosis during oogenesis, whereas apoptotic features can be observed later.

AB - Ex-fissiparous planarians produce infertile cocoons or, in very rare cases, cocoons with very low fertility. Here, we describe the features of programmed cell death (PCD) occurring in the hyperplasic ovary of the ex-fissiparous freshwater planarian Dugesia arabica that may explain this infertility. Based on TEM results, we demonstrate a novel extensive co-clustering of cytoplasmic organelles, such as lysosomes and microtubules, and their fusion with autophagosomes during the early stage of oocyte cell death occurring through an autophagic pattern. During a later stage of cell death, the generation of apoptotic vesicles in the cytoplasm can be observed. The immunohistochemical labeling supports the ultrastructural results because it has been shown that the proapoptotic protein bax was more highly expressed in the hyperplasic ovary than in the normal one, whereas the anti-apoptotic protein bcl2 was slightly more highly expressed in the normal ovary compared to the hyperplasic one. TUNEL analysis of the hyperplasic ovary confirmed that the nuclei of the majority of differentiating oocytes were TUNEL-positive, whereas the nuclei of oogonia and young oocytes were TUNEL-negative; in the normal ovary, oocytes are TUNEL-negative. Considering all of these data, we suggest that the cell death mechanism of differentiating oocytes in the hyperplasic ovary of freshwater planarians is one of the most important factors that cause ex-fissiparous planarian infertility. We propose that autophagy precedes apoptosis during oogenesis, whereas apoptotic features can be observed later.

U2 - 10.1007/s00441-014-1971-0

DO - 10.1007/s00441-014-1971-0

M3 - Journal article

C2 - 25107610

JO - Cell and Tissue Research

JF - Cell and Tissue Research

SN - 0302-766X

ER -