scholarly journals METHODS TO DETERMINE COMPLEX DEGREES OF MUTUAL ANISOTROPY FOR THE DIFFERENTIATION OF HEMORRHAGES IN THE HUMAN BRAIN SUBSTANCE RESULTING FROM TRAUMATIC AND NON-TRAUMATIC GENESIS

2020 ◽  
Vol 1 ◽  
pp. 18-23
Author(s):  
Marta Garazdiuk ◽  
Viktor Bachynskіy ◽  
Olena Nechytailo ◽  
Oleksandr Garazdiuk ◽  
Svitlana Malanchuk
Keyword(s):  
Cerebral Infarction ◽  
Human Brain ◽  
Group 4 ◽  
Brain Substance ◽  
Module Size ◽  
Traumatic Origin ◽  
Group 3 ◽  
Group 2 ◽  
Correlation Microscopy ◽  
The Brain

An issue that is often debated in forensic traumatology is the differential diagnosis of hemorrhages into the human brain substance (HBS) of traumatic and non-traumatic genesis. Objectives. This study aims to identify new criteria for objective forensic differentiation of hemorrhages of traumatic origin, cerebral infarction of ischemic and hemorrhagic genesis by using the method of complex degree of mutual anisotropy. For this study native sections of HBS from 125 corpses were used in the case of: death from coronary heart disease - 35 (28%) of native sections (Group 1 - control); hemorrhages of traumatic genesis - 30 (24%) sections (Group 2); ischemic cerebral infarction - 30 (24%) native sections(Group 3); and hemorrhages of non-traumatic genesis - 30 (24%) native sections (Group 4). Results. The statistical moments of the third and fourth orders, which characterize the asymmetry and excess of the complex degree of mutual anisotropy module size distributions, the strength of the method of polarization-correlation microscopy in the differentiation of the samples of the histological sections of the brain of control and experimental groups reached a good level — 87%-90%. Conclusion. The method of complex degree of mutual anisotropy allows differentiating with great precision the genesis of hemorrhage into the substance of the brain.

scholarly journals Differential possibilities of classical histological research methods for establishing the genesis of hemorrhages in the human brain substance

2021 ◽  
pp. 39-45
Author(s):  
Marta Garazdiuk
Keyword(s):  
Human Brain ◽  
Histological Examination ◽  
Morphological Changes ◽  
Structural Elements ◽  
Additional Material ◽  
Brain Substance ◽  
Group 3 ◽  
Group 2 ◽  
The Brain ◽  
Previous Group

Verification of the cause of death (CD) from ischemic cerebral infarction (ICI), hemorrhage of traumatic (GTG) and non-traumatic (GNG) genesis eliminates the violent origin of death. Very often it is difficult to diagnose the genesis of hemorrhage only macroscopically when performing an autopsy, so additional material should be selected for forensic histological examination. Aim of the work. To develop forensic criteria for the differentiation of ICI, GTG and GNG of the brain by light microscopy of histological sections of the human brain (HB). Material and methods. For the study were used native sections and stained histological specimens of HB from 110 corpses in the case of: death from ICI – 30 histological specimens (1 group), which were made of 30 speciments stained by the methods of Nissl and Spiel-Mayer; GNG – 30 histological samples (group 2) – 30 speciments, stained similarly to the previous group; GNG – 30 histological samples (group 3) – 30 speciments stained similarly to the previous group. Brain preparations in case of death from coronary heart disease were selected for control – 20 samples (4 groups) – 20 speciments stained by the methods of Nissl and Spiel-Mayer. Results. Analysis of the obtained data of histological examination of morphological changes of tissue elements of the human brain with different genesis of hemorrhage did not reveal stable relationships between changes in the structure of nervous tissue and the cause of hemorrhage. Conclusion. Given the nonspecificity of degenerative changes in the structural elements of the brain, depending on the genesis of hemorrhage, it can be concluded that morphological methods of histological preparations of the brain do not provide accurate and objective information about the genesis of hemorrhage.

scholarly journals Use of azimuthal-invariant Mueller-matrix images of linear dichroism of histological sections of brain substance for diagnosis of hemorrhage genesis

2020 ◽  
Vol 26 (2) ◽  
pp. 62-66
Author(s):  
M.S. Garazdiuk ◽  
O.V. Dubolazov ◽  
S.M. Malanchuk
Keyword(s):  
Cerebral Infarction ◽  
Linear Dichroism ◽  
Mueller Matrix ◽  
Histological Sections ◽  
Satisfactory Level ◽  
Group 4 ◽  
Brain Substance ◽  
Group 3 ◽  
Group 2 ◽  
Traumatic Hemorrhage

Differential diagnosis of the cause of death (CD) from ischemic cerebral infarction (ICI), hemorrhages of traumatic (HTG) and non-traumatic (HNG) genesis exclude the violent nature of death. The aim of our work was to develop forensic criteria for hemorrhage differentiation of traumatic and non-traumatic genesis and ICI by azimuthal-invariant Mueller-matrix images of linear dichroism of histological sections of brain substance (HBS). For the study were used native sections of HBS from 130 corpses in the case of: death from coronary heart disease – 40 of native sections (group 1 – control); HTG – 30 sections (group 2), ICI – 30 native sections (group 3), HNG – 30 native sections (group 4). Measuring the coordinate allocation meanings of parameters of polarization in the points of microscopic images was carried out at the location of the standard stokes-polarimeter. The effectiveness of intergroup differentiation of samples of deaths from traumatic hemorrhage and ischemic cerebral infarction reaches a satisfactory level and is 76-83%. Efficiency between group differentiation of samples of deaths from nontraumatic and traumatic hemorrhages reaches a satisfactory level and is 75-82%. As for differentiation between ischemic cerebral infarction and nontraumatic hemorrhages thise method is ineffective.

scholarly journals Brain Interstitial Adenosine and Sagittal Sinus Blood Flow during Systemic Hypotension in Piglet

1988 ◽  
Vol 8 (6) ◽  
pp. 822-828 ◽  
Author(s):  
T. S. Park ◽  
David G. L. Van Wylen ◽  
Rafael Rubio ◽  
Robert M. Berne
Keyword(s):  
Blood Flow ◽  
Interstitial Fluid ◽  
Cerebrovascular Resistance ◽  
Sagittal Sinus ◽  
Group 4 ◽  
Brain Dialysis ◽  
Group 3 ◽  
Group 2 ◽  
The Brain ◽  
Dialysis Technique

We sampled, using the brain dialysis technique, interstitial fluid adenosine from the frontal cortex of newborn piglets subjected to hemorrhagic hypotension while measuring sagittal sinus blood flow, cerebrovascular resistance (CVR), and cerebral O2 delivery. In group 1 (n = 8), MABP was reduced in successive steps from 76 to 30 mm Hg with decrements of ∼ 10 mm Hg. At 60 mm Hg, CVR decreased by 19% (p < 0.001), but sagittal sinus blood flow and interstitial fluid adenosine remained unchanged. At 50 mm Hg, both sagittal sinus blood flow and CVR decreased by 19% (p < 0.001) and interstitial fluid adenosine rose 4.7-fold (p < 0.05). At 40 and 30 mm Hg, sagittal sinus blood flow decreased further but CVR remained steady, whereas interstitial fluid adenosine rose 10- and 16-fold, respectively. In group 2 (n = 7), an abrupt reduction of MABP from 80 to 47 mm Hg produced no change in sagittal sinus blood flow and a 29% decrease in CVR (p < 0.01). Interstitial fluid adenosine increased twofold (p < 0.01). In group 3 (n = 7), an abrupt reduction of MABP from 79 to 40 mm Hg decreased sagittal sinus blood flow and CVR by 24 and 30%, respectively (p < 0.01). Interstitial fluid adenosine rose threefold (p < 0.01). In groups 1, 2, and 3, the increases in interstitial fluid adenosine accompanied decreases in cerebral O2 delivery. In group 4 (n = 7), artificial CSF with a Po2 of 152 mm Hg was perfused through the brain dialysis cannula during graded hypotension. In this group, interstitial fluid adenosine rose only at an MABP of 20 mm Hg. These data support the concept that adenosine participates in the regulation of CBF during hypotension in piglets.

scholarly journals The Level of Reactive Carbonyl Derivatives of Proteins, Malondialdehyde, and Catalase Activity in the Brain of Rats after Therapy Following Chronic Unpredictable Moderate Stress

2020 ◽  
Vol 8 (A) ◽  
pp. 691-698
Author(s):  
Yelena Valerievna Yepifantseva ◽  
Mayra Galimzhanovna Abdrakhmanova ◽  
Yelena Vladimirovna Pozdnyakova ◽  
Polina Sergeyevna Semenikhina ◽  
Ruslan Andreevich Belyayev ◽  
...  
Keyword(s):  
Behavioral Disorders ◽  
Oxidative Metabolism ◽  
Protein Carbonylation ◽  
Carbonyl Derivatives ◽  
Group 4 ◽  
Group 3 ◽  
Group 2 ◽  
Derivatives Of ◽  
The Brain ◽  
Group 1

BACKGROUND: Understanding the mechanisms of the behavioral disorders’ emergence under the influence of chronic stress is the most important aspect of the subsequent development of a strategy for its therapy and prevention. Changes in the oxidative metabolism processes can be decisive in the development of the pathogenetic cascade in the brain. Information about these processes can be obtained by studying protein carbonylation, lipid peroxidation, and catalase activity (CA). The complexity of the therapeutic impact in various behavioral disorders implies the search for new pharmacological substances and the study of the previously known drugs’ effects based on the available scientific data. AIM: The aim of the study was to study the reactive carbonyl derivatives of proteins (RCDP), malondialdehyde (MDA), and CA in the brain of rats after therapy following chronic unpredictable moderate stress (CUMS). METHODS: Forty male outbred rats weighing 450–500 g were used in this study. For 21 days, all animals were exposed to the diverse stress factors for developing the CUMS. The animals were divided into four groups of 10 rats, each using randomized selection. The rats of one group were euthanized by decapitation with subsequent brain harvesting (Group 4). Remaining three groups of rats were treated with placebo (Group 1), harmine hydrochloride (Group 2), and amitriptyline (Group 3) for 21 days. Upon completion of therapy, all rats were also euthanized by decapitation with subsequent brain harvesting. The levels of RCDP, MDA, and CA were studied in their brain, and after that, we compared the multiple studied indicators in four groups. RESULTS: The results of the rat brain examinations in four groups showed that RCDP level in Group 2 was significantly lower than in Group 4 (p = 0.000). Similarly, in Group 1, it was lower than in Group 4 (p = 0.021), plus, it did not differ statistically from the harmine hydrochloride group (p = 1,000). Indicators of Groups 3 and 4 did not have any significant differences in RCDP level, too, (p = 0.799); however, the RCDP level in Group 2 was significantly lower than in Group 3 (p = 0.040). MDA indicators did not show significant differences; however, a tendency for lower values was revealed in Group 1 (p = 0.233) and Group 2 (p = 0.151). CA in Group 4 was lower than that in Group 1 (p = 0.000), Group 2 (p = 0.001), and Group 3 (p = 0.003) contemporaneously, while all treatment groups were comparable (p = 1.000). CONCLUSION: The result of exposure to chronic stress can be reproduced with the best quality in the CUMS model. The neurobiological foundations of the model make it possible to assess biochemical markers of oxidative metabolism and evaluate the possibilities of pharmacological correction of stress-induced behavioral disorders. To assess the mechanisms of autoregulation of oxidative metabolism, this study included a placebo group (Group 1), the level of RCDP in which was significantly higher in comparison with Group 3 and Group 4 and slightly lower than in Group 2. In this study, harmine hydrochloride demonstrated activity exceeding amitriptyline, particularly limiting the process of protein carbonylation, not noted for amitriptyline. According to the results of the RCDP assessment in the CUMS model, the process of protein carbonylation can be considered to be one of the significant factors in the deactivation of neurotransmitters. The CA levels determined in all groups allowed us to consider this marker as the most sensitive to the effects of stress, which possibly has an inhibitory effect on catalase, as its activity in all groups after therapy was more than two-fold higher than in animals right after CUMS. We can assume that CA plays an important role in starting the processes of autoregulation of oxidative metabolism. The study was carried out as a part of the implementation of the scientific and technical program No. BR05236584 “Development of new herbal preparations and their pharmacological and clinical studies” (O.0820). (2018–2020) in the priority area, “Life and Health Sciences.”

Cytarabine and Ferric Carboxymaltose (Fe+3) Increase Oxidative Damage and Alter Serotonergic Metabolism in Brain

2019 ◽  
Vol 18 (2) ◽  
pp. 149-155
Author(s):  
David Calderón Guzmán ◽  
Norma Osnaya Brizuela ◽  
Maribel Ortíz Herrera ◽  
Hugo Juárez Olguín ◽  
Armando Valenzuela Peraza ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Lipid Peroxidation ◽  
Wistar Rats ◽  
Ferric Carboxymaltose ◽  
Anticancer Compounds ◽  
Group 4 ◽  
Group 3 ◽  
Group 2 ◽  
The Brain ◽  
Group 1

Background & Objective: The purpose of this study was to measure the effect on brain biomarkers after treatment with anticancer compounds - cytarabine (CT) and ferric carboxymaltose (FC) (Fe+3) in Wistar rats. Methods: The Wistar rats were treated as follows: group 1 (control), NaCl 0.9%; group 2, CT (25 mg/k), group 3, FC(Fe+3) (50 mg/k) and group 4, CT + FC(Fe+3). The animals were sacrificed and their brains were obtained and used to measure lipoperoxidation (TBARS), H2O2, Na+, K+ ATPase, glutathione (GSH), serotonin metabolite (5-HIAA) and dopamine. The results indicated an enhancement of lipid peroxidation in the cortex and striatum of groups treated with FC(Fe+3) and CT, while GSH decreased in the cortex of group treated with CT + FC(Fe+3). Dopamine decreased in the cortex of the rats that received CT, while in the striatum, 5HIAA increased in all groups. </P><P> Results & Conclusion: These results suggest that the treatment with CT and FC(Fe+3) boosted oxidative stress and led to an alteration in momoamine concentrations in the brain.

Analysis of radiosurgical results in patients with brain metastases according to the number of brain lesions: is stereotactic radiosurgery effective for multiple brain metastases?

2010 ◽  
Vol 113 (Special_Supplement) ◽  
pp. 73-78 ◽  
Author(s):  
Won Seok Chang ◽  
Hae Yu Kim ◽  
Jin Woo Chang ◽  
Yong Gou Park ◽  
Jong Hee Chang
Keyword(s):  
Brain Metastases ◽  
Brain Lesions ◽  
Rank Test ◽  
Survival Times ◽  
Group 4 ◽  
Metastatic Lesions ◽  
Log Rank Test ◽  
Group 3 ◽  
Group 2 ◽  
The Brain

Object Whole-brain radiation therapy (WBRT), open resection, and stereotactic radiosurgery (SRS) are widely used for treatment of metastatic brain lesions, and many physicians recommend WBRT for multiple brain metastases. However, WBRT can be performed only once per patient, with rare exceptions. Some patients may require SRS for multiple metastatic brain lesions, particularly those patients harboring more than 10 lesions. In this paper, treatment results of SRS for brain metastasis were analyzed, and an attempt was made to determine whether SRS is effective, even in cases involving multiple metastatic brain lesions. Methods The authors evaluated the cases of 323 patients who underwent SRS between October 2005 and October 2008 for the treatment of metastatic brain lesions. Treatment was performed using the Gamma Knife model C or Perfexion. The patients were divided into 4 groups according to the number of lesions visible on MR images: Group 1, 1–5 lesions; Group 2, 6–10 lesions: Group 3, 11–15 lesions; and Group 4, > 15 lesions. Patient survival and progression-free survival times, taking into account both local and distant tumor recurrences, were analyzed. Results The patients consisted of 172 men and 151 women with a mean age at SRS of 59 years (range 30–89 years). The overall median survival time after SRS was 10 months (range 8.7–11.4 months). The median survival time of each group was as follows: Group 1, 10 months; Group 2, 10 months; Group 3, 13 months; and Group 4, 8 months. There was no statistical difference between survival times after SRS (log-rank test, p = 0.554), although the probability of development of new lesions in the brain was greater in Group 4 (p = 0.014). Local tumor control rates were not statistically different among the groups (log-rank test, p = 0.989); however, remote disease progression was more frequent in Group 4 (log-rank test, p = 0.014). Conclusions In this study, patients harboring more than 15 metastatic brain lesions were found to have faster development of new lesions in the brain. This may be due to the biological properties of the patients' primary lesions, for example, having a greater tendency to disseminate hematogenously, especially to the brain, or a higher probability of missed or invisible lesions (microscopic metastases) to treat on stereotactic MR images at the time of radiosurgery. However, the mean survival times after SRS were not statistically different between groups. According to the aforementioned results, SRS may be a good treatment option for local control of metastatic lesions and for improved survival in patients with multiple metastatic brain lesions, even those patients who harbor more than 15 metastatic brain lesions, who, after SRS, may have early and easily detectable new metastatic lesions.

scholarly journals Interstitial Fluid Adenosine and Sagittal Sinus Blood Flow during Bicuculline-Seizures in Newborn Piglets

1987 ◽  
Vol 7 (5) ◽  
pp. 633-639 ◽  
Author(s):  
T. S. Park ◽  
David G. L. Van Wylen ◽  
Rafael Rubio ◽  
Robert M. Berne
Keyword(s):  
Blood Flow ◽  
Interstitial Fluid ◽  
Cerebrovascular Resistance ◽  
Newborn Piglets ◽  
Sagittal Sinus ◽  
Group 4 ◽  
Group 3 ◽  
Group 2 ◽  
The Brain ◽  
Level Group

Changes of interstitial fluid adenosine concentrations and effects of O2 supply on interstitial fluid adenosine were studied by the brain dialysis technique in the frontal cortex of newborn piglets subjected to bicuculline-induced seizures. The O2 supply was changed globally by changing MABP and locally by varying PO2 in the artificial CSF perfusing the dialysis cannula. Sagittal sinus blood flow (SSBF), cerebrovascular resistance (CVR), and CMRO2 were also examined in the same animals. Seizures increased interstitial fluid adenosine 7.9-fold (p < 0.05) when ictal MABP was maintained at preictal level and perfusate PO2 was 24 mm Hg (group 1, n = 6). Interstitial fluid adenosine increased 11.8-fold (p < 0.05) during seizures associated with moderate systemic hypotension and the low perfusate PO2 (group 2, n = 6). By contrast, seizures increased interstitial fluid adenosine three-fold (p < 0. 05) when perfusate PO2 was increased to 182 mm Hg and ictal MABP was maintained at preictal level (group 3, n = 8). When ictal MABP was elevated from the preictal level and the perfusate was rich in oxygen, seizures failed to increase interstitial fluid adenosine (group 4, n = 7). In groups 1 and 3, the increase in interstitial fluid adenosine during seizures was associated with significant increases in SSBF and CMRO2, as well as significant decreases in CVR. These data suggest that the increase in O2 supply during seizures in piglets did not match completely the increase in O2 demand and resulted in enhanced release of adenosine into the interstitial space.

scholarly journals Sildenafil alters biogenic amines and increases oxidative damage in brain regions of insulin-hypoglycemic rats

2020 ◽  
Vol 70 (1) ◽  
pp. 121-127
Author(s):  
David Calderón Guzmán ◽  
Norma Osnaya Brizuela ◽  
Maribel Ortíz Herrera ◽  
Armando Valenzuela Peraza ◽  
Gerardo Barragán Mejía ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Oxidative Damage ◽  
Biogenic Amines ◽  
Brain Metabolism ◽  
Brain Regions ◽  
Stress Markers ◽  
Group 4 ◽  
Group 3 ◽  
Group 2 ◽  
The Brain

AbstractThe aim of the present study was to determine the effect of sildenafil on dopamine, 5-hydroxyindol acetic acid (5-HIAA) and selected biomarkers of oxidative stress in the brain of hypoglycemic rats. The animals were treated intraperitoneally as follows: group 1 (control), saline solution; group 2, insulin (10 U per rat or 50 U kg−1); group 3, insulin + single dose of sildenafil (50 U kg−1 + 50 mg kg–1); group 4, insulin + three doses of sildenafil every 24 hours (50 U kg−1 + 50 mg kg−1). In groups 2, 3 and 4, insulin was administered every 24 hours for 10 days. Blood glucose was measured after the last treatment. On the last day of the treatment, the animals´ brains were extracted to measure the levels of oxidative stress markers [H2O2, Ca2+,Mg2+-ATPase, glutathione and lipid peroxidation (TBARS)], dopamine and 5-HIAA in the cortex, striatum and cerebellum/medulla oblongata by validated methods. The results suggest that administration of insulin in combination with sildenafil induces hypoglycemia and hypotension, enhances oxidative damage and provokes changes in the brain metabolism of biogenic amines. Administration of insulin and sildenafil promotes biometabolic responses in glucose control, namely, it induces hypoglycemia and hypotension. It also enhances oxidative damage and provokes changes in the brain metabolism of biogenic amines.

Morphological Changes in the Rat Granulosa Cell Surface During Differentiation Induced by Estradiol and Gonadotropins

1977 ◽  
Vol 35 ◽  
pp. 484-485
Author(s):  
P. Bagavandoss ◽  
JoAnne S. Richards ◽  
A. Rees Midgley
Keyword(s):  
Cell Surface ◽  
Granulosa Cell ◽  
Morphological Changes ◽  
Follicular Development ◽  
Female Rats ◽  
Functional Changes ◽  
Group 4 ◽  
Group 3 ◽  
Group 5 ◽  
Group 2

During follicular development in the mammalian ovary, several functional changes occur in the granulosa cells in response to steroid hormones and gonadotropins (1,2). In particular, marked changes in the content of membrane-associated receptors for the gonadotropins have been observed (1).We report here scanning electron microscope observations of morphological changes that occur on the granulosa cell surface in response to the administration of estradiol, human follicle stimulating hormone (hFSH), and human chorionic gonadotropin (hCG).Immature female rats that were hypophysectcmized on day 24 of age were treated in the following manner. Group 1: control groups were injected once a day with 0.1 ml phosphate buffered saline (PBS) for 3 days; group 2: estradiol (1.5 mg/0.2 ml propylene glycol) once a day for 3 days; group 3: estradiol for 3 days followed by 2 days of hFSH (1 μg/0.1 ml) twice daily, group 4: same as in group 3; group 5: same as in group 3 with a final injection of hCG (5 IU/0.1 ml) on the fifth day.

Correlation of γ-radioactivity and Scanning Electron Microscopy in measurement of retention of 111Indium-labeled canine endothelial cells on synthetic vascular grafts

1989 ◽  
Vol 47 ◽  
pp. 886-887
Author(s):  
E.J. Prendiville ◽  
S. Laliberté Verdon ◽  
K. E. Gould ◽  
K. Ramberg ◽  
R. J. Connolly ◽  
...  
Keyword(s):  
Blood Flow ◽  
Ex Vivo ◽  
Vascular Grafts ◽  
Retention Data ◽  
Vascular Prostheses ◽  
Group 4 ◽  
Human Fibronectin ◽  
Insufficient Time ◽  
Group 3 ◽  
Group 2

Endothelial cell (EC) seeding is postulated as a mechanism of improving patency in small caliber vascular grafts. However the majority of seeded EC are lost within 24 hours of restoration of blood flow in previous canine studies . We postulate that the cells have insufficient time to fully develop their attachment to the graft surface prior to exposure to hemodynamic stress. We allowed EC to incubate on fibronectin-coated ePTFE grafts for four different time periods after seeding and measured EC retention after perfusion in a canine ex vivo shunt circuit.Autologous canine EC, were enzymatically harvested, grown to confluence, and labeled with 30 μCi 111 Indium-oxine/80 cm 2 flask. Four groups of 5 cm x 4 mm ID ePTFE vascular prostheses were coated with 1.5 μg/cm.2 human fibronectin, and seeded with 1.5 x 105 EC/ cm.2. After seeding grafts in Group 1 were incubated in complete growth medium for 90 minutes, Group 2 were incubated for 24 hours, Group 3 for 72 hours and Group 4 for 6 days. Grafts were then placed in the canine ex vivo circuit, constructed between femoral artery and vein, and subjected to blood flow of 75 ml per minute for 6 hours. Continuous counting of γ-activity was made possible by placing the seeded graft inside the γ-counter detection crystal for the duration of perfusion. EC retention data after 30 minutes, 2 hours and 6 hours of flow are shown in the table.

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