Abstract:
:This study evidences the presence of primordial germ cells, in tissue squash preparations and sections from hematological malignancies. Primordial germ cells were identified by their morphology, the intense PAS, PAS-D reaction and presence of calcium-activated neutral proteinase. Primordial germ cells gave rise to nuclear vlimata. Immature oogonia exhibited a nuclear envelope and a star-shaped nuclear core, arising from acellular globose bodies impregnated by a nuclear vlima of primordial germ cell. Bone marrow tissue oogonia were PAS and PAS-D positive, identical to fungal ones. Calcium-activated neutral proteinase was demonstrated in the plasma of the acellular globose bodies, the nuclear envelope and the conglomerated primordial germ cells. Immature bone marrow oogonia progressed into mature ones, leptotene, diplotene, dictyotene and mature oocytes. Nuclear vlimata fertilized primordial germ cells, oogonia and oocytes, giving rise to round embryos at the morula and hatching morula-like stages. Embryos consisted of a zonapellucida-like cortex, composed of glycosaminoglycans, glycoproteins, protease and diffuse nuclear material, enclosing developing cells. Primordial germ cells, oogonia and embryos were also demonstrated in squash preparations of adult rat testis and sections of normal rat bone marrow tissues. The observations document that primordial germ cells are the primary stem cells which give rise to nuclear vlimata and oogonia, which constitute the secondary stem germ cells. The results are discussed in terms of stem cell renewal according to the events: primordial germ cells-gametes-fertilization-embryos-primordial germ cells.
journal_name
Histol Histopatholjournal_title
Histology and histopathologyauthors
Logothetou-Rella Hsubject
Has Abstractpub_date
1996-10-01 00:00:00pages
965-84issue
4eissn
0213-3911issn
1699-5848journal_volume
11pub_type
杂志文章abstract::In the last years, it has been reported that bone marrow stromal cells (BMSC) are able to differentiate towards a neuronal phenotype, in vitro as well as in vivo, and consequently, the possible use of these cells for the treatment of neurological diseases has acquired enormous importance. The objective of this review ...
journal_title:Histology and histopathology
pub_type: 杂志文章,评审
doi:10.14670/HH-24.107
更新日期:2009-01-01 00:00:00
abstract::Erythema dyschromicum perstans (EDP) and vitiligo are two cutaneous pigmentary dermatoses of unknown etiology. In the present study, the leukocyte infiltrates in the affected skin of EDP and vitiligo patients were studied using the avidin-biotin (ABC) immunoperoxidase technique and monoclonal antibodies which recognis...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:
更新日期:1987-07-01 00:00:00
abstract::The main objective of this ultrastructural study was to gain a better understanding of the involvement of brain vasculature in clearance of proteins from edematous fluid. For this purpose, both native and modified (cationized, glucosylated, and mannosylated) bovine serum albumin-gold complexes (BSA-G, catBSA-G, glucBS...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:10.14670/HH-13.647
更新日期:1998-07-01 00:00:00
abstract::Primary cultured human salivary gland cells were transfected with ori-defective mutant DNA of SV40. Following 2-3 weeks of transfection, slowly expanding colonies consisting of small compact cells emerged, while mock-transfected cells did not grow any more and eventually entered crisis, followed by cell death. Using l...
journal_title:Histology and histopathology
pub_type: 杂志文章,评审
doi:
更新日期:1994-10-01 00:00:00
abstract::Monoclonal antibody against histiocytosis X cells (HXCs) was established. The antigen was the cell membrane of HXCs from the submandibular lesion of a 63-year-old man who had been diagnosed as an adult type of histiocytosis X (HX) and whose HXCs had numerous Birbeck granules (BGs). The obtained monoclonal antibody, na...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:
更新日期:1992-07-01 00:00:00
abstract::Glaucoma is a neurodegenerative disease characterized by progressive loss of retinal ganglion cell axons and their cell bodies in the retina. Elevated intraocular pressure (IOP) is considered to be the major risk factor associated with the development of this neuropathy. Randomized controlled clinical trials have demo...
journal_title:Histology and histopathology
pub_type: 杂志文章,评审
doi:10.14670/HH-22.1399
更新日期:2007-12-01 00:00:00
abstract::Cell secretion is an important physiological process that ensures smooth metabolic activities, tissue repair and growth and immunological functions in the body. It occurs when the intracellular secretory materials are released to the exterior; these may be in the form of lipids, protein or mucous and may travel throug...
journal_title:Histology and histopathology
pub_type: 杂志文章,评审
doi:10.14670/HH-18.597
更新日期:2003-04-01 00:00:00
abstract::Spinal cord injury (SCI) is one of the most destructive traumatic diseases in human beings. The balance of inflammation in the microenvironment is crucial to the repair process of spinal cord injury. Inflammatory cytokines are direct mediators of local lesion inflammation and affect the prognosis of spinal cord injury...
journal_title:Histology and histopathology
pub_type: 杂志文章,评审
doi:10.14670/HH-18-262
更新日期:2020-10-01 00:00:00
abstract:BACKGROUND:Honey and olive oil are natural products that have high nutritional values, and therapeutic properties. Cytotoxic drugs, like methotrexate (MTX) are used to treat malignancies in tumour cells; however, these drugs also have serious side effects that could threaten the patient's life. AIM:To evaluate the pot...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:10.14670/HH-18-126
更新日期:2019-12-01 00:00:00
abstract::Bone marrow features in stable-phase chronic myelogenous leukemia (CML) are characterized by a striking heterogeneity which is determinable by appropriate means including representative pre-treatment trephine biopsies, immunohistochemistry and morphometry. Cell lineages involved to a variable extent consist not only o...
journal_title:Histology and histopathology
pub_type: 杂志文章,评审
doi:10.14670/HH-14.1241
更新日期:1999-10-01 00:00:00
abstract::F10, a subline of the B16 mouse melanoma cell line, is itself the parent of the more metastatic BL6 line. BL6 cells differ from F10 cells by an alteration of the gene encoding the B56gamma regulatory subunit of protein phosphatase 2A (PP2A), which results in mRNA encoding a truncated variant of the subunit (deltagamma...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:10.14670/HH-19.391
更新日期:2004-04-01 00:00:00
abstract::The transport mechanism of soluble molecules throughout the interstitial matrix is closely associated with human tumor behavior in vivo. However, the examination of soluble components in histological architectures has been hampered by artifacts caused during conventional tissue preparation. In this study, the immunodi...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:10.14670/HH-24.717
更新日期:2009-06-01 00:00:00
abstract::An immunohistochemical study of matrix metalloproteinases (MMP-2 and MMP-9) or gelatinase (gelatinase A and gelatinase B) was performed on the seminal vesicles and ventral prostate of the Libyan jird (Meriones libycus) collected in the Beni-Abbes area during breeding period (spring and early summer), during resting ph...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:10.14670/HH-25.619
更新日期:2010-05-01 00:00:00
abstract::The developing fetal brain is one of the most susceptible organs to irradiation insult. Prenatal irradiation-induced abnormalities in the cerebrum have been well examined in mouse fetuses. However, little information on abnormalities in the cerebellum caused by irradiation is available. Moreover, few reports have exam...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:10.14670/HH-23.953
更新日期:2008-08-01 00:00:00
abstract::The renin-angiotensin system (RAS) and tubuloglomerular feedback (TGF) are central to the maintenance of blood pressure and body fluid composition. Renin, NO synthase-1 (NOS-1), and cyclooxygenase-2 (COX-2) are key regulators of the RAS and TGF. In the present study, to investigate species-specific differences in the ...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:10.14670/HH-23.143
更新日期:2008-02-01 00:00:00
abstract::The present study analyzed the temporal and spatial expression of TGF-beta isoforms and activated pSmad2 and p38MAPK during epithelial debridement wound repair, using chick cornea by immunohistochemistry. Normal corneas showed low-level TGF-betas staining. Following wounding, TGF-beta1 expression was strong in the Bow...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:10.14670/HH-24.1405
更新日期:2009-11-01 00:00:00
abstract::Chaperone-mediated autophagy (CMA), a selective form of autophagy, where cellular proteins with KFERQ-like motif are targeted to the lysosome for degradation, is necessary to maintain cellular homeostasis. The role of CMA in neurodegenerative diseases has been extensively studied in the past decades, with defects in t...
journal_title:Histology and histopathology
pub_type: 杂志文章,评审
doi:10.14670/HH-18-202
更新日期:2020-07-01 00:00:00
abstract::Six 4 month-old beagles were inoculated with Leishmania donovani infantum, three of them intraperitoneally (Group A) and the other three intravenously (Group B). The animals from Group A were killed 109, 433 and 592 days after inoculation and animals from Group B 109, 171 and 334 after inoculation. The liver of each o...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:
更新日期:1988-10-01 00:00:00
abstract::In the lungs, neuronal M2 muscarinic receptors limit the release of acetylcholine from postganglionic cholinergic nerves. However, these receptors are not functional under certain circumstances in animal models of hyperreactivity such as occurs after exposure of sensitised animals to an allergen or during a respirator...
journal_title:Histology and histopathology
pub_type: 杂志文章,评审
doi:10.14670/HH-15.861
更新日期:2000-07-01 00:00:00
abstract::Neurotrophins are substances that have been shown to be important in growth and remodelling phases in different types of tissue. There is no information concerning the possible occurrences of neurotrophins and their receptors in tendons. In this study, sections of both chronic painful (tendinosis) and pain-free (non-t...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:10.14670/HH-24.839
更新日期:2009-07-01 00:00:00
abstract::Strain injuries of tendons are the most common orthopedic injuries in athletic subjects, be they equine or human. When the tendon is suddenly damaged, an acute inflammatory phase occurs whereas its repetitive overloading may cause chronic injuries. Currently the criteria used for grading injuries are general and subje...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:10.14670/HH-11-601
更新日期:2015-08-01 00:00:00
abstract::Src, a 60 kDa non-receptor tyrosine kinase, is the product of normal c-src of the human genome and member of the Src protein tyrosine kinases family (SFK). As described by Martin and Rous, a genetic recombination between c-src and the RSV oncogene of Rous sarcoma virus results in a modified Src protein, with increased...
journal_title:Histology and histopathology
pub_type: 杂志文章,评审
doi:10.14670/HH-27.677
更新日期:2012-06-01 00:00:00
abstract::Hexachlorobenzene (HCB) is a fungicide and a pollutant of increasing concern in industrialized regions of the world. Reproductive failure is one of the effects of HCB upon mammals. Alteration of cell shape in the ovary surface epithelium (OSE) of Cynomolgus monkeys following oral administration of HCB was observed in ...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:
更新日期:1991-10-01 00:00:00
abstract::Human epithelium contains keratin, which is expressed during differentiation. Depending on the target cell type, different types of keratin are expressed, and their alterations seem to represent changes in cell properties. The basal cells of oral epithelium express keratin 5 (K5), K14, K15 and K19, but their alteratio...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:10.14670/HH-27.949
更新日期:2012-07-01 00:00:00
abstract::Duodenal samples were taken from similar locations in six cats, processed, stained, and examined via light microscope. There were no prominent circular folds (plicae circulares) or stratum compactum (lamina subglandularis). The 1072 microns x 201 microns villi were covered by 46 microns high columnar epitheliocytes pr...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:
更新日期:1986-10-01 00:00:00
abstract::The epicardium is the outer mesothelial layer of the heart. It covers the myocardium and plays important roles in both heart development and regeneration. It is derived from the proepicardium (PE), groups of cells that emerges at early developmental stages from the dorsal pericardial layer (DP) close to the atrio-vent...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:10.14670/HH-18-238
更新日期:2020-09-01 00:00:00
abstract::Membranous glomerulonephritis caused in Barbus graellsi by myxosporidian infections have been studied by electron microscopy and immunoelectron microscopy techniques. This study indicates that Myxosporidian infection produces a chronic severe aggression. Spores reach the spleen, the kidney and the liver, where they ar...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:
更新日期:1993-10-01 00:00:00
abstract::The presence of the mu-opioid receptor and the type of glycosylation in the third extra-cellular loop of this receptor was investigated in the isthmus of mare oviduct during oestrus by means of immunoblotting and immunohistochemistry combined with enzymatic (N-glycosidase F and O-glycosidase) and chemical (beta-elimin...
journal_title:Histology and histopathology
pub_type: 杂志文章
doi:10.14670/HH-23.555
更新日期:2008-05-01 00:00:00
abstract::Bacillary angiomatosis (BA) is a reactive vasoproliferative lesion occurring almost exclusively in immunocompromised individuals in response to infection by a bacillus closely related to Rochalimaea quintana. The commonest site of involvement is the skin, in the form of multiple erythematous nodules, but bacillary ang...
journal_title:Histology and histopathology
pub_type: 杂志文章,评审
doi:
更新日期:1992-01-01 00:00:00
abstract::TNFalpha exerts apoptosis throughout an intracellular transduction pathway that involves the kinase proteins TRAF-2 (integration point of apoptotic and survival signals), ASK1 (pro-apoptotic protein), MEK-4 (p38 activator and metastasis suppressor gene), JNK (stress mitogen activated protein kinase) and the transcript...
journal_title:Histology and histopathology
pub_type: 杂志文章,评审
doi:10.14670/HH-23.1279
更新日期:2008-10-01 00:00:00