scholarly journals On exploration of geometrically constrained space by medicinal leeches Hirudo verbana

Biosystems ◽  
2015 ◽  
Vol 130 ◽  
pp. 28-36 ◽  
Author(s):  
Andrew Adamatzky
Keyword(s):  
Hirudo Verbana ◽  
Geometrically Constrained ◽  
Medicinal Leeches

Proteins and peptides of the salivary gland secretion of medicinal leeches Hirudo verbana, H. medicinalis, and H. orientalis

2008 ◽  
Vol 73 (3) ◽  
pp. 315-320 ◽  
Author(s):  
I. P. Baskova ◽  
E. S. Kostrjukova ◽  
M. A. Vlasova ◽  
O. V. Kharitonova ◽  
S. A. Levitskiy ◽  
...  
Keyword(s):  
Salivary Gland ◽  
Gland Secretion ◽  
Salivary Gland Secretion ◽  
Hirudo Verbana ◽  
Medicinal Leeches ◽  
Proteins And Peptides

scholarly journals Functional morphology of suction discs and attachment performance of the Mediterranean medicinal leech ( Hirudo verbana Carena)

2016 ◽  
Vol 13 (117) ◽  
pp. 20160096 ◽  
Author(s):  
Tim Kampowski ◽  
Laura Eberhard ◽  
Friederike Gallenmüller ◽  
Thomas Speck ◽  
Simon Poppinga
Keyword(s):  
Functional Morphology ◽  
High Speed ◽  
Substrate Surface ◽  
Surrounding Medium ◽  
Medicinal Leech ◽  
Force Measurements ◽  
High Speed Video ◽  
Hirudo Verbana ◽  
Substrate Surface Roughness ◽  
Medicinal Leeches

Medicinal leeches use their suction discs for locomotion, adhesion to the host and, in the case of the anterior disc, also for blood ingestion. The biomechanics of their suction-based adhesion systems has been little understood until now. We investigated the functional morphology of the anterior and posterior suckers of Hirudo verbana by using light and scanning electron microscopy. Furthermore, we analysed the adhesion qualitatively and quantitatively by conducting behavioural and mechanical experiments. Our high-speed video analyses provide new insights into the attachment and detachment processes and we present a detailed description of the leech locomotion cycle. Pull-off force measurements of the anterior and posterior suction organs on seven different substrates under both aerial and water-submersed conditions reveal a significant influence of the surrounding medium, the substrate surface roughness and the tested organ on attachment forces and tenacities.

scholarly journals Effects of various environments on number of cocoon and offspring in breeding of southern medicinal leech, Hirudo verbana Carena, 1820

2020 ◽  
Vol 37 (3) ◽  
pp. 207-211
Author(s):  
Bahadır Ugural ◽  
Ramazan Serezli
Keyword(s):  
Medicinal Leech ◽  
Controlled Conditions ◽  
Significant Difference ◽  
Hirudo Verbana ◽  
New Material ◽  
Controlled Environments ◽  
Medicinal Leeches ◽  
Hygienic Conditions

Breeding medicinal leeches in controlled environments is extremely important in order to prevent their extinction. Moreover, due to medicinal leeches coming into contact with the patient's blood, breeding medicinal leeches in hygienic conditions is essential to prevent possible complications. In this study, breeding patterns of Hirudo verbana were studied in controlled conditions and the effects of various moist environments were examined. Peat, hydrogel and chopped sponge materials were compared in terms of number of cocoon and offspring in medicinal leech breeding. Peat and hydrogel environments didn’t show any statistically significant difference for number of cocoon and offspring breeding. Cocoon per leech was 3.13 ± 0.74 for peat and 2.80 ± 0.56 for hydrogel respectively. Offspring per cocoon was 11.81 ± 2.27 for peat and 12.52 ± 1.98 for hydrogel (P>0.05) respectively. In conclusion, hydrogel could be a new material for medicinal leech cocoon deposition environment especially for laboratory breeders.

Size structures and comparative phenology of syntopic populations of Hirudo verbana and Hirudo medicinalis in eastern Ukraine

Biologia ◽  
2012 ◽  
Vol 67 (5) ◽  
Author(s):  
Marina Kovalenko ◽  
Serge Utevsky
Keyword(s):  
Growth Rate ◽  
Hirudo Medicinalis ◽  
Wilcoxon Test ◽  
Large Weight ◽  
Ecological Requirements ◽  
Hirudo Verbana ◽  
Sequential Samples ◽  
Medicinal Leeches ◽  
Biogeographical Pattern ◽  
Two Populations

AbstractRanges of different species of medicinal leeches (Hirudo spp.) are nearly mutually exclusive with very few areas of overlapping. This biogeographical pattern suggests different ecological requirements for the two species. However, two habitats in Hungary and Ukraine where populations of H. verbana and H. medicinalis coexist were found. The aim of this research was to reveal differences in size structures and phenologies between the two species in a steppe pond with two populations. The study was conducted from March to September in 2009 and 2010 in Horila Dolyna, Kharkiv Region. Leeches were collected several times during the season, weighed and released. The abundance of H. verbana was always higher. The Mann-Whitney U-test and the Wilcoxon test were applied. Significant differences between sequential samples within the species were found. The large weight classes of H. verbana emerged by the end of summer and caused a higher variance in contrast to H. medicinalis. This suggests the higher growth rate and the more r-strategic biology of H. verbana in comparison with the largely K-strategic H. medicinalis.

scholarly journals Draft genome sequences ofHirudo medicinalisand salivary transcriptome of three closely related medicinal leeches

2018 ◽  
Author(s):  
Vladislav V. Babenko ◽  
Oleg V. Podgorny ◽  
Valentin A. Manuvera ◽  
Artem S. Kasianov ◽  
Alexander I. Manolov ◽  
...  
Keyword(s):  
Critical Role ◽  
Differential Expression Analysis ◽  
Draft Genome ◽  
Blood Feeding ◽  
Cell Secretion ◽  
Blood Sucking ◽  
Genes Encoding ◽  
Hirudo Verbana ◽  
Salivary Cell ◽  
Medicinal Leeches

AbstractSalivary cell secretion (SCS) plays a critical role in blood feeding by medicinal leeches, making them of use for certain medical purposes even today. We annotated theHirudo medicinalisgenome and performed RNA-seq on salivary cells isolated from three closely related leech species,H. medicinalis, Hirudo orientalis,andHirudo verbana.Differential expression analysis verified by proteomics identified salivary cell-specific genes, many of which encode previously unknown salivary components. However, the genes encoding known anticoagulants were not differentially expressed in the salivary cells. The function-related analysis of the unique salivary cell genes enabled an update of the concept of interactions between salivary proteins and components of haemostasis. Thus, our study provides one of the most comprehensive knowledge of the genetic fundamentals of the blood-sucking lifestyle in leeches.

Seasonal Bioaccumulation of Heavy Metals by Medicinal Leech Hirudo verbana

2018 ◽  
Vol 54 (5) ◽  
pp. 56-62
Author(s):  
L. V. Chornaya ◽  
L. A. Kovalchuk ◽  
N. V. Mikshevich
Keyword(s):  
Heavy Metals ◽  
Medicinal Leech ◽  
Hirudo Verbana

Leech Therapy - A unique treatment in Ayurveda

2019 ◽  
Vol 4 (02) ◽  
Author(s):  
Prasadshakti G. Gannur
Keyword(s):  
Blood Circulation ◽  
Skin Diseases ◽  
Varicose Veins ◽  
Blood Stream ◽  
Blood Capillaries ◽  
Analgesic Property ◽  
Vein Thrombosis ◽  
Leech Therapy ◽  
Medicinal Leeches ◽  
Deep Vein

As mentioned in Ayurveda, Rakta itself is life for human being. If it get vitiated (impure) by means of unhealthy food habits and seasonal change is going to induce many disease. There is a unique worm - Leech which is used therapeutically to treat certain diseases induced by impure blood. Medicinal leeches are used for therapeutic purpose; these will suck only impure blood and relieve the symptoms. While sucking leaches leave saliva into the blood stream, which contain many medicinal properties. Out of which Hirudin is the main content which is having very effective anti-coagulant and analgesic property, because of this analgesic property, the process of sucking is painless. Leaches are mainly used in skin diseases as acne, Kusta, Visarpa, recurrent abscess along with these certain diseases which involve impairment of the blood circulation such as varicose veins deep vein thrombosis non healing ulcers and necrosis are also get benefited by leech therapy which improve the blood circulation by stimulating blood capillaries. Hence in this paper the uses of leech therapy are mentioned for the society to get benefited.

scholarly journals Methylation of geometrically constrained lysine analogues by histone lysine methyltransferases

2020 ◽  
Vol 56 (20) ◽  
pp. 3039-3042 ◽  
Author(s):  
Abbas H. K. Al Temimi ◽  
Paul B. White ◽  
Marcus J. M. Mulders ◽  
Nicole G. A. van der Linden ◽  
Richard H. Blaauw ◽  
...  
Keyword(s):  
Substrate Specificity ◽  
Histone Lysine ◽  
Lysine Methyltransferases ◽  
Geometrically Constrained ◽  
Histone Lysine Methyltransferases

Histone lysine methyltransferases (KMTs) exhibit substrate specificity for lysine and its geometrically constrained mimics.

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