scholarly journals SURVIVAL AND MULTIPLICATION OF THE VIRUS OF POLIOMYELITIS IN VITRO

1930 ◽  
Vol 52 (3) ◽  
pp. 361-377 ◽  
Author(s):  
P. H. Long ◽  
P. K. Olitsky ◽  
C. P. Rhoads
Keyword(s):  
Cell Culture ◽  
Ascitic Fluid ◽  
Kidney Tissue ◽  
Clinical Signs ◽  
Tissue Cell ◽  
Original Material ◽  
Living Tissue ◽  
Tissue Cells ◽  
As If

The study here reported concerns attempts at bacteriological cultivations with fragments of brain or cord, or with Berkefeld V filtrates of the nervous tissues, from seven monkeys successfully inoculated with poliomyelitic virus. With these materials, 315 tubes were inoculated, of which thirty-six showed minute bodies resembling the globoid bodies described by Flexner and Noguchi. However, a study of subplants from these minute, morphological particles did not convince us that we had in hand actual cultures of the globoid bodies, or indeed of any living microorganism. Nevertheless, when washed sediments from subplants of one of the strains, representing the seventh, eighth, ninth, and tenth transfers, were inoculated into monkeys, the clinical signs and pathological effects characteristic of experimental poliomyelitis could be induced. The virulence of the "cultures" could not be ascribed to carrying over the original material into these remote subplants since the seventh transfer represented a dilution of the original cultivated material to about 1.5 x 10–12, and the tenth, to about 1.3 x 10–18 if one assume, as the transfer technic justifies, a thorough mixing of the contents of each tube. On the contrary, it appears as if the poliomyelitic virus had multiplied in vitro, and had increased as a consequence of being in a medium of a modified living tissue-cell culture. For in practically all specimens we observed many well-preserved kidney tissue cells and leucocytes, the latter probably derived from human ascitic fluid, a component of the Smith-Noguchi medium. In this connection, it should be mentioned that the several lots of ascitic fluid used in the cultivation tests were recently obtained from patients and employed from a week to a month after their collection. There remains for consideration the problem of the selective pathogenicity of the "cultures:" only the material of those tubes of the ninth and tenth transfers which showed the "globoid bodies" proved pathogenic; those respective tubes of the same transfers which were free from the minute bodies but apparently identical in all other respects, were avirulent. It may be that the virus was adsorbed to the particular bodies which we have found in the "cultures" and which resemble closely the globoid bodies of Flexner and Noguchi. Further elaboration of this study would be necessary, however, before such an inference could be regarded as a definite hypothesis.

scholarly journals A gC1qR Prevents White Spot Syndrome Virus Replication in the Freshwater Crayfish Pacifastacus leniusculus

2010 ◽  
Vol 84 (20) ◽  
pp. 10844-10851 ◽  
Author(s):  
Apiruck Watthanasurorot ◽  
Pikul Jiravanichpaisal ◽  
Irene Söderhäll ◽  
Kenneth Söderhäll
Keyword(s):  
Cell Culture ◽  
Viral Replication ◽  
White Spot Syndrome Virus ◽  
Pacifastacus Leniusculus ◽  
White Spot ◽  
Tissue Cell ◽  
Freshwater Crayfish ◽  
White Spot Syndrome

ABSTRACT The gC1qR/p32 protein is a multiple receptor for several proteins and pathogens. We cloned a gC1qR homologue in a crustacean, Pacifastacus leniusculus, and analyzed the expression of P. leniusculus C1qR (PlgC1qR) in various tissues. The gC1qR/p32 transcript was significantly enhanced by white spot syndrome virus (WSSV) infection 6 h after viral infection both in vitro in a hematopoietic tissue cell culture (Hpt) and in vivo compared to appropriate controls. Moreover, PlgC1qR silencing in both the Hpt cell culture and live crayfish enhanced the WSSV replication. In addition, by making a recombinant PlgC1qR protein we could show that if this recombinant protein was injected in a crayfish, Pacifastacus leniusculus, followed by injection of WSSV, this significantly reduced viral replication in vivo. Furthermore, if the recombinant PlgC1qR was incubated with Hpt cells and then WSSV was added, this also reduced viral replication. These experiments clearly demonstrate that recombinant PlgC1qR reduce WSSV replication both in vivo and in vitro. The results from a far-Western overlay and glutathione S-transferase pull-down assays showed that PlgC1qR could bind to VP15, VP26, and VP28. Altogether, these results demonstrate a role for PlgC1qR in antiviral activity against WSSV.

Chlamydia Psittaci in a Koala (Phascolarctos Cinereus) Population in South-East Queensland.

1994 ◽  
Vol 21 (1) ◽  
pp. 41 ◽  
Author(s):  
NA White ◽  
P Timms
Keyword(s):  
Cell Culture ◽  
False Negative ◽  
Clinical Signs ◽  
Chlamydia Psittaci ◽  
Rural South ◽  
Phascolarctos Cinereus ◽  
Urogenital Infection ◽  
Urogenital Infections ◽  
Overt Disease

Clinical signs are useful in determining the level of overt disease. However, neither the complement fixation test, nor the presence of clinical signs of disease are appropriate measures for the detection of Chlamydia psittaci in koalas because of false negative rates of 43 and 57%, respectively. Infection due to C. psittaci was most accurately determined in a population of koalas in rural south-east Queensland by in vitro cell culture of samples from ocular and urogenital sites. Prevalence of infection ranged from 39 to 61% with no evidence of a trend with time. Females had more urogenital and fewer concurrent ocular and urogenital infections than males. Parous females (n = 17) were free of disease and only one was recorded with urogenital infection (cell culture). In non-parous females (n = 16), 6 showed clinical signs of urogenital disease and a further 3 were infected (cell culture).

scholarly journals THE GROWTH OF TISSUE IN ACID MEDIA

1913 ◽  
Vol 18 (2) ◽  
pp. 183-186 ◽  
Author(s):  
Peyton Rous
Keyword(s):  
Connective Tissue ◽  
Tissue Cell ◽  
Chick Embryos ◽  
Artificial Circulation ◽  
Acid Media ◽  
The Poor ◽  
Tumor Tissues ◽  
Metabolic Products ◽  
Tissue Cells

Connective tissue cells of chick embryos and cells of a chicken sarcoma, proliferating in vitro, soon render acid the plasma about them, but they nevertheless continue to grow well. Evidently the tissue cell will withstand a considerably greater change in the reaction of the fluids about it than has usually been supposed. Under conditions of in vitro life in plasma, which do not provide for an artificial circulation, the acid produced by growing tissues diffuses only slowly and is subject to little dilution from this source. About tissues which grow very rapidly in vitro, as, for example, tumor tissues, there must be a marked concentration of metabolic products, and this may largely account for the poor results of attempts at the continuous propagation of such tissues in vitro.

Partner telomeres during anaphase in crane-fly spermatocytes are connected by an elastic tether that exerts a backward force and resists poleward motion

2002 ◽  
Vol 115 (7) ◽  
pp. 1541-1549 ◽  
Author(s):  
James R. LaFountain ◽  
Richard W. Cole ◽  
Conly L. Rieder
Keyword(s):  
Cell Culture ◽  
Strong Evidence ◽  
Laser Microbeam ◽  
In Vitro Cell Culture ◽  
Pulling Forces ◽  
As If

As chromosomes move polewards during anaphase in crane-fly spermatocytes,trailing arms commonly stretch backwards for a brief time, as if tethered to their partners. To test that notion, a laser microbeam was used to sever trailing arms and thereby release telomere-containing arm segments (called acentric fragments because they lack kinetochores) from segregating chromosomes. Analysis of the movement of acentric fragments after their release provided clear evidence that previously conjoined partners were indeed tethered at their telomeres and that tethers exerted backward forces that were sufficient to move the fragment across the equator and into the opposite half-spindle. To address concerns that tethers might be artifacts of in vitro cell culture, spermatocytes were fixed in situ, and stretched arms within fixed cells provided strong evidence for tethers in vivo. The substantial resistance that tethers impose on the poleward movement of chromosomes must normally be over-ridden by the poleward `pulling' forces exerted at kinetochores. In spermatocytes, poleward forces are supplied primarily by the`traction fibers' that are firmly attached to kinetochores through end-on attachments to the plus ends of kinetochore microtubules.

scholarly journals Catecholamines production by kidney tissue and mesangial cell culture is differentially modulated by diabetes

2021 ◽  
Author(s):  
Roseli Peres Moreira ◽  
Nadia S. C. Bertoncello ◽  
Juliana Almada Colucci ◽  
Danielle Yuri Arita ◽  
Maria Claudina Camargo de Andrade ◽  
...  
Keyword(s):  
Cell Culture ◽  
Mesangial Cell ◽  
Mesangial Cells ◽  
Kidney Tissue ◽  
International Diabetes Federation ◽  
Sharp Decrease ◽  
Diabetic Rats ◽  
Control Group

Abstract Introduction: According to the International Diabetes Federation, the number of people with diabetes mellitus may reach 700 million in 2045. Catecholamines are involved in the regulation of several kidney functions. This study investigates the effects of hyperglycemia on catecholamines' metabolism in kidney tissue from control, diabetic, and insulin-treated diabetic rats, both in vivo and in vitro. Methods: Male Wistar-Hannover rats were randomized into: control, diabetic, and insulin-treated diabetic groups. Diabetes was induced by a single injection of streptozotocin, and diabetic treated group also received insulin. After 60 days, blood and kidney tissue from all groups were collected for catecholamines' quantification and mesangial cells culture. Results: diabetic rats had lower body weight, hyperglycemia, and increase water intake and diuresis. Additionally, diabetes promoted a sharp decrease in creatinine clearance compared to control group. Regarding the whole kidney extracts, both diabetic groups (treated and non-treated) had significant reduction in norepinephrine concentration. In mesangial cell culture, catecholamines' concentration were lower in the culture medium than in the intracellular compartment for all groups. Norepinephrine, epinephrine, and dopamine medium levels were increased in the diabetic group. Conclusion: The major finding of the present study was that 8 weeks of diabetes induction altered the kidney catecholaminergic system in a very specific manner, once the production of catecholamines in the excised kidney tissue from diabetic rats was differentially modulated as compared with the production and secretion by cultured mesangial cells.

Drug screening in cell culture for the detection of anticoccidial activity

Parasitology ◽  
1976 ◽  
Vol 73 (2) ◽  
pp. 137-148 ◽  
Author(s):  
John F. Ryley ◽  
Robert G. Wilson
Keyword(s):  
Cell Culture ◽  
Host Cell ◽  
Drug Screening ◽  
Active Drug ◽  
Eimeria Tenella ◽  
Tissue Cell ◽  
Cell Toxicity ◽  
Anticoccidial Activity

Methods for screening compounds against Eimeria tenella in cell culture and in the chicken are described. An analysis for incidence of anticoccidial activity and host cell toxicity has been made of 11550 compounds screened in vitro, and some correlation of activity in vitro and in vivo has been attempted. The results show that screening compounds in tissue (cell) culture is not a satisfactory or reliable alternative to screening in chickens, although in vitro studies undoubtedly have a part to play in the evaluation of an active drug.

scholarly journals Kultur Sel Otak Ikan Kerapu Bebek (Cromileptes altivelis) Dengan Menggunakan Media L-15, MEM Dan TCM [Cell Culture Brain Of Chromileptes altivelis With Medium L-15, MEM And TCM].

2019 ◽  
Vol 2 (2) ◽  
pp. 107
Author(s):  
Hari Suprapto, Nunik Diantiwi
Keyword(s):  
Cell Culture ◽  
Cell Biology ◽  
Fish Tissue ◽  
Brain Cell ◽  
Culture Technique ◽  
Tissue Cell ◽  
Foreign Markets ◽  
Viral Nervous Necrosis ◽  
Brain Cell Culture

Abstract Humpback grouper is high value commodity fish. The demand of domestic and foreign markets increases every year. The obstacles of Humpback grouper fish cultivation is a disease caused by Viral Nervous Necrosis (VNN). The virus attacks the brain leading to mass death. To prevent the disease, a research on VNN virus has to be started. The problem of the research is the lack of culture of fish tissue. Virus have specific location to tissue cell and species to be infected. Thereofore, first step must be done is growth from tissue cell which infection of virus. Cell culture is a technique to isolate cell, protoplasm, tissue or organ to be grown in a sterile condition with nutrition containing growth hormone to promote multiplication. Cell culture technique can be used in many basic applications in cell biology. The purpose of this research is to develop cell culture from Grouper fish brain for VNN research. The hope is culture can grow and develop well.Research executed at June until Desember 2009 in Laboratory In Vitro of Veterinari Faculty of Airlangga University and Laboratory Gastroenteritis Institute of Tropical Disease, Airlangga University, Surabaya. The result showed that brain cell culture of humpback grouper fish can be grow and multiply well in all three media, media L-15 cell growth was faster compared to media MEM and TCM.

Electron microscopic study of the membrane glycoproteins in the rat kidney after cisplatin treatment

1989 ◽  
Vol 47 ◽  
pp. 912-913
Author(s):  
S.K. Aggarwal
Keyword(s):  
Alkaline Phosphatase ◽  
Rat Kidney ◽  
Light And Electron Microscopy ◽  
Kidney Tissue ◽  
Membrane Glycoproteins ◽  
Electron Microscopic ◽  
Before And After ◽  
Interstrand Cross Links ◽  
Cross Links

The proposed primary mechanism of action of the anticancer drug cisplatin (Cis-DDP) is through its interaction with DNA, mostly through DNA intrastrand cross-links or DNA interstrand cross-links. DNA repair mechanisms can circumvent this arrest thus permitting replication and transcription to proceed. Various membrane transport enzymes have also been demonstrated to be effected by cisplatin. Glycoprotein alkaline phosphatase was looked at in the proximal tubule cells before and after cisplatin both in vivo and in vitro for its inactivation or its removal from the membrane using light and electron microscopy.Outbred male Swiss Webster (Crl: (WI) BR) rats weighing 150-250g were given ip injections of cisplatin (7mg/kg). Animals were killed on day 3 and day 5. Thick slices (20-50.um) of kidney tissue from treated and untreated animals were fixed in 1% buffered glutaraldehyde and 1% formaldehyde (0.05 M cacodylate buffer, pH 7.3) for 30 min at 4°C. Alkaline phosphatase activity and carbohydrates were demonstrated according to methods described earlier.

HVEM Analysis of Microfilament Patterns in The Margins of Tissue Cells

1980 ◽  
Vol 38 ◽  
pp. 808-811
Author(s):  
Carol Allen
Keyword(s):  
Cell Movement ◽  
Cell Spreading ◽  
Living Cells ◽  
Tissue Cell ◽  
Large Sample Size ◽  
Cell Periphery ◽  
Whole Cell ◽  
Critical Point Drying ◽  
Lamellar Region ◽  
Tissue Cells

When provided with a suitable solid substrate, tissue cells undergo a rapid conversion from the spherical form expressed in suspension culture to a characteristic flattened morphology. As a result of this conversion, called cell spreading, the cell nucleus and organelles come to occupy a central region of “deep cytoplasm” which slopes steeply into a peripheral “lamellar” region less than 1 pm thick at its outer edge and generally free of cell organelles. Cell spreading is accomplished by a continuous outward repositioning of the lamellar margins. Cell translocation on the substrate results when the activity of the lamellae on one side of the cell become dominant. When this occurs, the cell is “polarized” and moves in the direction of the “leading lamellae”. Careful analysis of tissue cell locomotion by time-lapse microphotography (1) has shown that the deformational movements of the leading lamellae occur in a repeating cycle of advance and retreat in the direction of cell movement and that the rate of such deformations are positively correlated with the speed of cell movement. In the present study, the physical basis for these movements of the cell margin has been examined by comparative light microscopy of living cells with whole-mount electron microscopy of fixed cells. Ultrastructural observations were made on tissue cells grown on Formvar-coated grids, fixed with glutaraldehyde, further processed by critical-point drying, and then photographed in the High Voltage Electron Microscope. This processing and imaging system maintains the 3-dimensional organization of the whole cell, the relationship of the cell to the substrate, and affords a large sample size which facilitates quantitative analysis. Comparative analysis of film records of living cells with the whole-cell micrographs revealed that specific patterns of microfilament organization consistently accompany recognizable stages of lamellar formation and movement. The margins of spreading cells and the leading lamellae of locomoting cells showed a similar pattern of MF repositionings (Figs. 1-4). These results will be discussed in terms of a working model for the mechanics of lamellar motility which includes the following major features: (a) lamellar protrusion results when an intracellular force is exerted at a locally weak area of the cell periphery; (b) the association of cortical MFs with one another determines the local resistance to this force; (c) where MF-to-MF association is weak, the cell periphery expands and some cortical MFs are dragged passively forward; (d) contact of the expanded area with the substrate then triggers the lateral association and reorientation of these cortical MFs into MF bundles parallel to the direction of the expansion; and (e) an active interaction between these MF bundles associated with the cortex of the expanded lamellae and the cortical MFs which remained in the sub-lamellar region then pulls the latter MFs forward toward the expanded area. Thus, the advance of the cell periphery on the substrate occurs in two stages: a passive phase in which some cortical MFs are dragged outward by the force acting to expand the cell periphery, and an active phase in which additional cortical MFs are pulled forward by interaction with the first set. Subsequent interactions between peripheral microfilament bundles and filaments in the deeper cytoplasm could then transmit the advance gained by lamellar expansion to the bulk of the cytoplasm.

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