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Kovalenko K, Dai X, Alfaro-Bittner K, Raigorodskii AM, Perc M, Boccaletti S. Contrarians Synchronize beyond the Limit of Pairwise Interactions. Phys Rev Lett 2021; 127:258301. [PMID: 35029445 DOI: 10.1103/physrevlett.127.258301] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 10/12/2021] [Accepted: 11/05/2021] [Indexed: 06/14/2023]
Abstract
We give evidence that a population of pure contrarian globally coupled D-dimensional Kuramoto oscillators reaches a collective synchronous state when the interplay between the units goes beyond the limit of pairwise interactions. Namely, we will show that the presence of higher-order interactions may induce the appearance of a coherent state even when the oscillators are coupled negatively to the mean field. An exact solution for the description of the microscopic dynamics for forward and backward transitions is provided, which entails imperfect symmetry breaking of the population into a frequency-locked state featuring two clusters of different instantaneous phases. Our results contribute to a better understanding of the powerful potential of group interactions entailing multidimensional choices and novel dynamical states in many circumstances, such as in social systems.
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Affiliation(s)
- K Kovalenko
- Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141701, Russian Federation
| | - X Dai
- Northwestern Polytechnical University, Xi'an 710072, People's Republic of China
| | - K Alfaro-Bittner
- Departamento de Física, Universidad Técnica Federico Santa María, Avenida España 1680, Casilla 110V, Valparaíso, Chile
| | - A M Raigorodskii
- Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141701, Russian Federation
- Adyghe State University, ulica Pervomaiskaya, 208, Maykop 385000, Russia
- Moscow State University, Leninskie Gory, 1, Moscow 119991, Russia
- Buryat State University, ulica Ranzhurova, 5, Ulan-Ude 670000, Russia
| | - M Perc
- Faculty of Natural Sciences and Mathematics, University of Maribor, Koroška cesta 160, 2000 Maribor, Slovenia
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 404332, Taiwan
- Complexity Science Hub Vienna, Josefstädterstraße 39, 1080 Vienna, Austria
- Alma Mater Europaea, Slovenska ulica 17, 2000 Maribor, Slovenia
| | - S Boccaletti
- Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141701, Russian Federation
- Universidad Rey Juan Carlos, Calle Tulipán s/n, 28933 Móstoles, Madrid, Spain
- CNR - Institute of Complex Systems, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
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Somova O, Ivanova H, Sotnyk N, Kovalenko K, Feskova I. P-050 The effectiveness of the platelet-rich plasma treatment of men with severe oligoasthenoteratozoospermia. Hum Reprod 2021. [DOI: 10.1093/humrep/deab127.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Study question
To evaluate the effect of platelet-rich plasma (PRP) testicular injections on spermogram parameters of men with severe oligoasthenoteratozoospermia (OAT).
Summary answer
The PRP testicular injections have beneficial effects on spermatogenesis and enhance sperm concentration and motility in infertile men with OAT.
What is known already
The use of PRP therapy in assisted reproductive technologies is debatable. Despite the recent evidence of its positive effects in promoting endometrial and follicular growth, data from clinical studies are limited. There are only a few papers on the effectiveness of PRP therapy in the treatment of male infertility and sexual dysfunction. In more detail, the influence of PRP on spermatogenesis was carried out only on experimental animals. Although the mechanisms of its action have not yet been clarified, it is assumed that PRP, containing many biologically active molecules, realizes its effect through the tissue regeneration and cell proliferation.
Study design, size, duration
This prospective study included 68 men (34.6±5.2) years old with severe OAT (≤4 million/ml, motility ≤30%, normal sperm morphology ≤1%) receiving hormonal and antioxidant (AO) therapy during 6 months before in vitro fertilization cycles. 33 of them were injected once with autologous PRP (0.5 ml in each testicle). Spermogram and testosterone level were analyzed before the treatment and in 3, 4 and 6 months after it.
Participants/materials, setting, methods
Sperm concentration, motility and morphology in ejaculate of 33 men of PRP group were compared with those in the group of 35 men without PRP within 6 months of starting the treatment. Total and free testosterone level were measured in blood serum. PRP was prepared by centrifuging the patient’s own blood in the anticoagulant-containing tubes. The final concentration of platelets in the obtained sample was 950.000 – 1.250 000 cells in 1 ml.
Main results and the role of chance
4 months after the PRP injection, sperm concentration and motility increased in 18 of 33 men of the PRP group compared with the baseline (before the treatment) – 4.2 (1.0;6.9) vs 1.4 (0.1;3.4) mln/ml (p < 0.05) and 36.7 (30.6;45.8) vs 17.7 (6.7;28.2) % respectively (p < 0.05).The maximum increase in sperm motility (but not in sperm concentration!) was observed in 24 men in 6 months – 49.6 (39.6;56.4) % (p < 0.05). Percent of morphologically normal spermatozoa in ejaculate slightly increased only in 12 men in that time period from 0-1 % to 1-2%. The total testosterone level was 2.4 times higher than the baseline (31.6±7.2 vs 13.2±4.3 nmol/l, p < 0.05), the free testosterone level was 1.8 times higher (14.5±3.5 vs 7.9±3.0 pgl/ml, p < 0.05).
Unlike the PRP group, in the group of men without PRP treatment, the sperm parameters did not changed compared with the baseline in 4 months after the starting hormonal and AO treatment. A significant increase of sperin concentration was observed only in 17 of 35 patients in 6 months. Sperm motility and percent of morphologically normal spermatozoa after the treatment did not differ from the baseline. Changes in the testosterone levels were similar to changes in PRP group.
Limitations, reasons for caution
Only young and middle-aged men were considered in the study. Large randomized controlled studies are required to confirm the PRP therapy efficacy and safety of f various fertility disorders. There are also no standardized protocols for PRP preparation.
Wider implications of the findings
PRP therapy may have great potential for the treatment of male infertility and improving spermatogenesis. Optimization of methods of PRP preparation and dosage of testicular injections can enhance reproductive outcomes in assisted reproductive technologies.
Trial registration number
not applicable
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Affiliation(s)
- O Somova
- Centre of Human Reproduction Sana-Med Clinic of Professor Feskov O., IVF Deparrtment, Kharkiv, Ukraine
| | - H Ivanova
- Centre of Human Reproduction Sana-Med Clinic of Professor Feskov O., IVF Deparrtment, Kharkiv, Ukraine
| | - N Sotnyk
- Centre of Human Reproduction Sana-Med Clinic of Professor Feskov O., Biothechnology Department, Kharkiv, Ukraine
| | - K Kovalenko
- Centre of Human Reproduction Sana-Med Clinic of Professor Feskov O., Biothechnology Department, Kharkiv, Ukraine
| | - I Feskova
- Centre of Human Reproduction Sana-Med Clinic of Professor Feskov O., IVF Deparrtment, Kharkiv, Ukraine
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Somova O, Ivanova H, Sotnyk N, Kovalenko K, Feskova I. P–050 The effectiveness of the platelet-rich plasma treatment of men with severe oligoasthenoteratozoospermia. Hum Reprod 2021. [DOI: 10.1093/humrep/deab130.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Study question
To evaluate the effect of platelet-rich plasma (PRP) testicular injections on spermogram parameters of men with severe oligoasthenoteratozoospermia (OAT).
Summary answer
The PRP testicular injections have beneficial effects on spermatogenesis and enhance sperm concentration and motility in infertile men with OAT.
What is known already
The use of PRP therapy in assisted reproductive technologies is debatable. Despite the recent evidence of its positive effects in promoting endometrial and follicular growth, data from clinical studies are limited. There are only a few papers on the effectiveness of PRP therapy in the treatment of male infertility and sexual dysfunction. In more detail, the influence of PRP on spermatogenesis was carried out only on experimental animals. Although the mechanisms of its action have not yet been clarified, it is assumed that PRP, containing many biologically active molecules, realizes its effect through the tissue regeneration and cell proliferation.
Study design, size, duration
This prospective study included 68 men (34.6±5.2) years old with severe OAT (≤4 million/ml, motility ≤30%, normal sperm morphology ≤1%) receiving hormonal and antioxidant (AO) therapy during 6 months before in vitro fertilization cycles. 33 of them were injected once with autologous PRP (0.5 ml in each testicle). Spermogram and testosterone level were analyzed before the treatment and in 3, 4 and 6 months after it. Participants/materials, setting, methods: Sperm concentration, motility and morphology in ejaculate of 33 men of PRP group were compared with those in the group of 35 men without PRP within 6 months of starting the treatment. Total and free testosterone level were measured in blood serum. PRP was prepared by centrifuging the patient’s own blood in the anticoagulant-containing tubes. The final concentration of platelets in the obtained sample was 950.000 – 1.250 000 cells in 1 ml.
Main results and the role of chance
4 months after the PRP injection, sperm concentration and motility increased in 18 of 33 men of the PRP group compared with the baseline (before the treatment) – 4.2 (1.0; 6.9) vs 1.4 (0.1; 3.4) mln/ml (p < 0.05) and 36.7 (30.6; 45.8) vs 17.7 (6.7; 28.2)% respectively (p < 0.05).The maximum increase in sperm motility (but not in sperm concentration!) was observed in 24 men in 6 months – 49.6 (39.6; 56.4)% (p < 0.05). Percent of morphologically normal spermatozoa in ejaculate slightly increased only in 12 men in that time period from 0–1% to 1–2%. The total testosterone level was 2.4 times higher than the baseline (31.6±7.2 vs 13.2±4.3 nmol/l, p < 0.05), the free testosterone level was 1.8 times higher (14.5±3.5 vs 7.9±3.0 pgl/ml, p < 0.05).
Unlike the PRP group, in the group of men without PRP treatment, the sperm parameters did not changed compared with the baseline in 4 months after the starting hormonal and AO treatment. A significant increase of sperin concentration was observed only in 17 of 35 patients in 6 months. Sperm motility and percent of morphologically normal spermatozoa after the treatment did not differ from the baseline. Changes in the testosterone levels were similar to changes in PRP group.
Limitations, reasons for caution
Only young and middle-aged men were considered in the study. Large randomized controlled studies are required to confirm the PRP therapy efficacy and safety of f various fertility disorders. There are also no standardized protocols for PRP preparation.
Wider implications of the findings: PRP therapy may have great potential for the treatment of male infertility and improving spermatogenesis. Optimization of methods of PRP preparation and dosage of testicular injections can enhance reproductive outcomes in assisted reproductive technologies.
Trial registration number
Not applicable
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Affiliation(s)
- O Somova
- Centre of Human Reproduction Sana-Med Clinic of Professor Feskov O., IVF Deparrtment, Kharkiv, Ukraine
| | - H Ivanova
- Centre of Human Reproduction Sana-Med Clinic of Professor Feskov O., IVF Deparrtment, Kharkiv, Ukraine
| | - N Sotnyk
- Centre of Human Reproduction Sana-Med Clinic of Professor Feskov O., Biothechnology Department, Kharkiv, Ukraine
| | - K Kovalenko
- Centre of Human Reproduction Sana-Med Clinic of Professor Feskov O., Biothechnology Department, Kharkiv, Ukraine
| | - I Feskova
- Centre of Human Reproduction Sana-Med Clinic of Professor Feskov O., IVF Deparrtment, Kharkiv, Ukraine
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Mäesaar M, Kramarenko T, Meremäe K, Sõgel J, Lillenberg M, Häkkinen L, Ivanova M, Kovalenko K, Hörman A, Hänninen ML, Roasto M. Antimicrobial Resistance Profiles of Campylobacter spp. Isolated from Broiler Chicken Meat of Estonian, Latvian and Lithuanian Origin at Estonian Retail Level and from Patients with Severe Enteric Infections in Estonia. Zoonoses Public Health 2015; 63:89-96. [PMID: 26053630 DOI: 10.1111/zph.12208] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Indexed: 11/29/2022]
Abstract
The resistance patterns of Campylobacter spp. isolated from retail broiler chicken meat originating either from Estonia, Lithuania or Latvia collected in Estonia were determined. Additionally, in collaboration with the laboratories of several Estonian hospitals, antimicrobial susceptibility patterns were determined for Campylobacter isolates from patients with severe Campylobacter enteric infections. The isolates were identified at the species level by the PCR method. Respectively, 88.8% of the isolates were C. jejuni, and 11.2% were C. coli. In total, 126 Campylobacter isolates of broiler chicken meat and human origin were tested for minimal inhibitory concentrations (MICs) with the broth microdilution VetMIC(TH) method (National Veterinary Institute; Uppsala, Sweden) for a total of six antimicrobials. Resistance to one or more antimicrobials was detected in 62 (63.3%) of Campylobacter broiler chicken meat isolates and in 20 (71.4%) of human-origin isolates. Large proportions of the broiler chicken meat isolates were resistant to ciprofloxacin (60.2%). Multidrug resistance (i.e. to three or more unrelated antimicrobials) was detected in five (5.1%) C. jejuni isolates. Among the human isolates, 20 (71.4%) were resistant to fluoroquinolones, and two (7.1%) C. jejuni isolates exhibited multidrug resistance. The chicken meat isolates of Estonian origin were the most susceptible. However, a high proportion of fluoroquinolone-resistant C. jejuni isolates were found in Latvian and Lithuanian products. The results of this study indicate that the problems caused by the inappropriate use of antimicrobials extend beyond the country in which a food originates; therefore, both domestic and international interventions and agreements are required to implement common policies on antimicrobial usage and to minimize the emergence of Campylobacter drug resistance.
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Affiliation(s)
- M Mäesaar
- Veterinary and Food Laboratory, Tartu, Estonia.,Department of Food Hygiene, Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - T Kramarenko
- Veterinary and Food Laboratory, Tartu, Estonia.,Department of Food Hygiene, Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - K Meremäe
- Department of Food Hygiene, Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - J Sõgel
- Food Department, Veterinary and Food Board, Tallinn, Estonia
| | - M Lillenberg
- Department of Food Hygiene, Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - L Häkkinen
- Veterinary and Food Laboratory, Tartu, Estonia
| | - M Ivanova
- Laboratory of Microbiology, Rakvere Hospital, Rakvere, Estonia.,Central Laboratory, East-Tallinn Central Hospital, Tallinn, Estonia
| | - K Kovalenko
- Institute of Food and Environmental Hygiene, Faculty of Veterinary Medicine, Latvia University of Agriculture, Jelgava, Latvia
| | - A Hörman
- The Finnish Defence Forces, Helsinki, Finland
| | - M-L Hänninen
- Department of Food Hygiene and Environmental Health, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
| | - M Roasto
- Department of Food Hygiene, Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Tartu, Estonia
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