Triggers of migraine: where do we stand?

PURPOSE OF REVIEW: In this review, we illustrate and discuss the recent findings regarding the epidemiology and pathophysiology of migraine triggers and their implications in clinical practice. RECENT FINDINGS: Data from the literature suggest that individual triggers fail to provoke migraine attack in experimental settings. It is therefore possible that more triggers acting in combination are needed to induce an attack by promoting some degree of brain dysfunction and thus increasing the vulnerability to migraine. Caution is however needed, because some of the factors rated as triggers by the patients may actually be a component of the clinical picture of migraine attacks. SUMMARY: Trigger factors of migraine are endogenous or exogenous elements associated with an increased likelihood of an attack in a short period of time and are reported by up to 75.9% of patients. Triggers must be differentiated from premonitory symptoms that precede the headache phase but do not have a causative role in attack provocation, being rather the very first manifestations of the attack. Identification of real triggers is an important step in the management of migraine. Vice versa, promoting an active avoiding behaviour toward factors whose role as triggers is not certain would be ineffective and even frustrating for patients.

[Evaluation of a pulsed xenon ultraviolet light- emitting no-touch, portable device for disinfection of surfaces in operating rooms in the Policlinico University Hospital of Foggia, Italy, 2019. Preliminary results]. / Efficacia di un sistema di trattamento no-touch con unità mobile a luce UV pulsata allo Xeno per la disinfezione delle superfici nelle sale operatorie: risultati preliminari nel Policlinico Riuniti di Foggia, 2019.

OBJECTIVES: To evaluate the effectiveness and the frequency of use of a pulsed xenon ultraviolet light-emitting no-touch portable device (PX-UV), applied after perform current cleaning, in reducing environmental bacterial burden and the presence of pathogens on surfaces in the operating rooms at the Policlinico University Hospital of Foggia. DESIGN: Prospective before-and-after study with a follow up duration of four months, from May to August 2019. SETTING AND PARTICIPANTS: Two operating rooms of an Orthopaedic and a Neurosurgical ward in a 780-bed university hospital in the District of Foggia, Italy (about 600,000 inhabitants). MAIN OUTCOME MEASURES: According to the hygienic standards proposed by the Italian Workers Compensation Authority (ISPESL), the total and the average bacterial load and the presence of six pathogens were evaluated between pre- and post- PX-UV use combined with routine manual cleaning. RESULTS: The PX-UV system was applied at five distinct time points: t1: start of the experiment, t2: after 28 days, t3: after 13 days, t4: after 7 days, and t5: after 8 days (t2-t5: 28 days in total). About 16-min of PX-UV cycle showed significant reduction in the level of environmental contamination by decreasing the mean colony count by 87.5%, compliant with the standard (5< X ≤15 CFU per plat). Staphylococcus aureus and Acinetobacter baumannii that had been isolated in some of the samplings before PX-UV were no longer detected after t1, t2 and t5 treatments. Before PX-UV, the mean colony count was similar between t1 and t2 (p>0.05); after t3 and t4 treatments, it was lower before t5 in both the Orthopaedic and Neurosurgical operating rooms (= -97% and -75%, respectively; p<0,01). CONCLUSIONS: Implication for practice: PX-UV could supplement the standard cleaning process in reducing the microbial burden in the operating rooms and potentially achieving lower healthcare-associated surgical site infections rates.

Hyperkinetic movement disorders in congenital disorders of glycosylation.

BACKGROUND AND PURPOSE: Congenital disorders of glycosylation (CDG) represent an increasing number of rare inherited metabolic diseases associated with abnormal glycan metabolism and disease onset in infancy or early childhood. Most CDG are multisystemic diseases mainly affecting the central nervous system. The aim of the current study was to investigate hyperkinetic movement disorders in patients affected by CDG and to characterize phenomenology based on CDG subtypes. METHODS: Subjects were identified from a cohort of patients with CDG who were referred to the University Hospital of Catania, Italy. Patients were evaluated by neurologists with expertise in movement disorders and videotaped using a standardized protocol. RESULTS: A variety of hyperkinetic movement disorders was detected in eight unrelated CDG patients. Involuntary movements were generally observed early in childhood, maintaining a clinical stability over time. Distribution ranged from a generalized, especially in younger subjects, to a segmental/multifocal involvement. In patients with phosphomannomutase 2 CDG, the principal movement disorders included dystonia and choreo-athetosis. In patients affected by other CDG types, the movement disorders ranged from pure generalized chorea to mixed movement disorders including dystonia and complex stereotypies. CONCLUSIONS: Hyperkinetic movement disorder is a key clinical feature in patients with CDG. CDG should be considered in the differential diagnosis of childhood-onset dyskinesia, especially when associated with ataxia, developmental delay, intellectual disability, autism or seizure disorder.

Delayed tooth replantation and inflammatory root resorption in childhood and adolescence.

Avulsion of one or more permanent teeth represents an emergency in dentistry. The main treatment is the replantation of the tooth/teeth as soon as possible to decrease possible complications. However, this is not always possible, and, in many cases, the patient undergoes a delayed replantation and subsequently prosthetic and implant treatments.

Food-borne botulism in Apulia region, Italy: an expert witness testimony.

We report the epidemiology of food-borne botulism in Puglia, Italy, between 1977-2017, using surveillance data and Experts' personal observations. As the disease is rare, the diagnosis is often missed or delayed, and cases are initially misdiagnosed. This was the case of a family outbreak of botulism in the 1970s.

Evaluation of measles and rubella integrated surveillance system in Apulia region, Italy, 3 years after its introduction.

This study aimed at evaluating the integrated measles and rubella surveillance system (IMRSS) in Apulia region, Italy, from its introduction in 2013 to 30 June 2016. Measles and rubella case reports were extracted from IMRSS. We estimated system sensitivity at the level of case reporting, using the capture-recapture method for three data sources. Data quality was described as the completeness of variables and timeliness of notification as the median-time interval from symptoms onset to initial alert. The proportion of suspected cases with laboratory investigation, the rate of discarded cases and the origin of infection were also computed. A total of 127 measles and four rubella suspected cases were reported to IMRSS and 82 were laboratory confirmed. Focusing our analysis on measles, IMRSS sensitivity was 82% (95% CI: 75-87). Completeness was >98% for mandatory variables and 57% for 'genotyping'. The median-time interval from symptoms onset to initial alert was 4.5 days, with a timeliness of notification of 33% (41 cases reported ⩽48 h). The proportion of laboratory investigation was 87%. The rate of discarded cases was 0.1 per 100 000 inhabitants per year. The origin of infection was identified for 85% of cases. It is concluded that IMRSS provides good quality data and has good sensitivity; still efforts should be made to improve the completeness of laboratory-related variables, timeliness and to increase the rate of discarded cases.

The use of casein in sport mouthguards: microbiological and ecological variations in oral cavity.

Sport mouthguards have the potential to become a microbial reservoir, produce oral and systemic diseases and cause negative changes in the oral cavity. The aim of this study was to monitor oral environmental changes caused by casein and sport-mouthguard in vivo, through clinical, salivary and bacterial markers of young athletes. Forty-eight active young athletes in different disciplines were selected and analysed at different times: baseline (T0); after three months of casein application on the mouthguard (T1); and after six months of application (T2). The product used was GC Tooth Mousse®. At T0, clinical monitoring was performed and the following parameters were recorded: Decay-Missing-Filled Teeth (DMFT) index, Plaque index (PL+) and Gingival Bleeding (BOP+). Saliva-Check Buffer GC® and Saliva-CheckMutans GC® salivary tests were then performed. At T0 the athletes demonstrated DMFT 0.03±0.01. PL value was positive in 100% of subjects at T0, T1, and T2. The BI value was always negative. At the three time-points, a significant change in baseline hydration values was observed; baseline viscosity was normal in 50% of cases while it increased in the remaining 50% at T0; it was normal and constant at T1 and T2. The value of the baseline pH underwent an not statistically significant increase at T1 (7.6±0.08) while remaining constant at T2. The amount of saliva produced after 5-min stimulation ranged significantly and gradually from T0 to T1 and T2, with a statistically significant difference. Plaque indicator tests highlighted that at T0 a plaque with a pH of 6.0±0.5 prevailed; at T1 it was 6.25±0.75 while at T2, pH was equal to 6. Tests for the detection of S. mutans resulted constant in all subjects at the various observation times, resulting in 67% of patients in whom S. mutans was present. The application of casein, within custom-made ethylene- vinyl acetate (EVA) mouthguards, positively influences salivary flow, the increase of pH values, the amount of stimulated saliva and the buffering capacity of the athlete, improving their state of oral health, which is negatively affected by the use of common mouthguards.

Epidemiology and cost of cervical cancer care and prevention in Apulia (Italy), 2007/2016.

BACKGROUND: According to recent estimates, cervical cancer is worldwide the second most common cancer in females and the fourth overall. The number of deaths for cervical cancer is around 7.5% of all female cancer deaths. Cervical cancer is the only tumour with a known necessary cause, the HPV infection and, globally, HPV is the most common sexually transmitted infection. Two major approaches for cervical cancer prevention have been designed: primary prevention by HPV vaccination and secondary prevention by screening. The aim of our study is to design an overview of epidemiology, cost of the therapies and cost of prevention measures (screening and vaccines) 9 years after the introduction of anti-HPV vaccination in the Apulia Regional Immunization Program. STUDY DESIGN: Retrospective observational study. METHODS: To describe the epidemiology of cervical cancer, we analysed data from the Apulia regional archive of hospital discharge forms (SDO). We considered all records referred to cervical cancer using the ICD 9 code 180.xxx both in primary and secondary diagnosis, for the years 2007-2016. Subjects living in Apulia have been considered. Costs of hospitalization were computed considering generated Diagnosis Related Groups (DRG). To describe the Apulian screening program, we analysed data from Regional Screening Data warehouse; the cost of the single test was established according to the Tariff List from the Ministry of Health. Finally, vaccination data were extracted by Regional Immunization Database and official ex-factory price has been used to calculate the costs of immunization program. RESULTS: From 2007 to 2016, an important decrease in the incidence rate of cervical cancer in Apulia has been noted, ranging from 43.7 per 100,000 residents in 2007 to 21.0 per 100,000 residents in 2016. From an economic point of view, a clear reduction (39%) is observed in hospitalization costs over time. Total costs of prevention programs increased over time and globally exceed € 54,000,000, with a decreasing trend for vaccine prophylaxis and an increasing trend for screening. CONCLUSIONS: The incidence and costs of cervical cancer in Apulia, although already significantly decreasing, likely will be further reduced since 2027-2032, when we can observe the effects of vaccine prophylaxis on the burden of disease; on this occasion it will be also possible to quantify the actual cost-effectiveness of the vaccine. In our opinion, in the future the Apulia healthcare executives should enhance and improve the active screening test offer, without underestimating the importance of sexual education in young people, especially in those who have not had sexual debut yet.

A novel mutation in NDUFB11 unveils a new clinical phenotype associated with lactic acidosis and sideroblastic anemia.

NDUFB11, a component of mitochondrial complex I, is a relatively small integral membrane protein, belonging to the "supernumerary" group of subunits, but proved to be absolutely essential for the assembly of an active complex I. Mutations in the X-linked nuclear-encoded NDUFB11 gene have recently been discovered in association with two distinct phenotypes, i.e. microphthalmia with linear skin defects and histiocytoid cardiomyopathy. We report on a male with complex I deficiency, caused by a de novo mutation in NDUFB11 and displaying early-onset sideroblastic anemia as the unique feature. This is the third report that describes a mutation in NDUFB11, but all are associated with a different phenotype. Our results further expand the molecular spectrum and associated clinical phenotype of NDUFB11 defects.

The use of chlorhexidine in mouthguards.

Sports mouthguards have the potential to become a microbial reservoir, to produce oral and systemic diseases and cause changes in environmental oral factors, inhibiting the protective effect of saliva. The aim of this study was to monitor, in vivo, oral environmental changes caused by chlorhexidine and sports mouthguards and in vitro, the effects of microbial strains, saliva and chlorhexidine on Ethylene-Vinyl-Acetate (EVA) material. Seventy-two athletes were analyzed at different time points: before training session (T0), post-training (TA), post-training with mouthguard (TB), post-training with mouthguard and chlorhexidine (TC). At each time of observation, saliva was collected and subjected to microbiological analysis. In vitro, EVA disks were incubated with bacterial cultures, saliva and clorexidine. Culture of supernatant solution, SEM and bacterial counts of EVA disks were performed. S. mutans and Candida spp. load decreased significantly in TC. The pH value significantly decreased in TB and improved in TC. In vitro, the analyzed bacteria were organized to form a biofilm on the EVA disk surface. The addition of chlorhexidine to the bacterial culture and saliva inhibited the growth in all tested conditions. In vivo, the use of chlorhexidine associated with the sports mouthguard inhibited the growth of pathogenic microbial species, and improved pH values. In vitro, EVA stimulated biofilm formation on its surface, but this action was contrasted by chlorhexidine. The effects found in vitro encouraged the use of chlorhexidine in vivo as a valuable tool in the use of mouthguards.

Exhaled breath temperature measurement: influence of circadian rhythm.

Exhaled breath temperature (EBT) is an expression of airway inflammation, an event that drives several lung diseases. The measurement of the exhaled breath temperature has recently been proposed as a popular tool in the diagnosis and monitoring of inflammatory lung diseases due to the fact that it is a non-invasive method. The influence of external factors on EBT, its reproducibility, and its sensitivity to treatment have already been explored. However, to reach clinical practice, EBT requires a complete validation that is still lacking. The aim of this study was to analyse the possible influence of an important internal variable, i.e the circadian rhythm on EBT values in a group of 24 healthy adult volunteers. We repeated measurement of EBT at different hours of the day: 8.00 AM, 12.00 AM, 4.00 PM, 8.00 PM and analysed the correlation with axillary temperature measurement at these times. The EBT resulted significantly different during daily measurements (8.00 AM vs 12.00 AM vs 4.00 PM vs 8.00 PM: 28.01±1.64°C vs 28.8±1.82°C vs 29.34±1.79°C vs 28.06±1.34°C). The highest EBT was reported at 4.00 PM and the lowest at 8.00 AM. For the first time we found an influence of the circadian rhythm on EBT. These data support the validation of the EBT necessary for its promotion in clinical practice.

Black Stains: a microbiological analysis and a view on familiarity and susceptibility to tooth decay of patients in childhood.

AIM: Assess prevalence, familial predisposition and susceptibility to caries of Black Stains (BS). Evaluate the microbiological composition of BS, saliva and subgingival plaque. MATERIALS AND METHODS: Sixty nine subjects with BS (test group) and 120 subjects without BS (control group) were analysed for oral status. For each BS-patient, a BS-deposit, 1 ml of saliva and subgingival plaque were collected and microbiologically analysed. Five deciduous teeth with BS were observed under SEM. RESULTS: This study showed a BS prevalence similar to that of the Mediterranean area and a familiality. The microbiological origin of BS was confirmed by SEM and culture method and the BS flora differ from that of supragingival plaque. CONCLUSIONS: Predominance in BS and saliva of Actinomycetes and the low salivary prevalence of S. mutans and L. acidophilus may be related with low caries incidence in BS patients. The high presence of Actinomyces spp can be a causative factor for BS.

Comparison of salivary antioxidant enzyme activity between ex-smokers and subjects who had never smoked.

Smoke contains oxidants such as oxygen-free radicals which are probably the major cause of damage to biomolecules. A decrease of salivary antioxidant enzymes was detected in habitual smokers. However, the effects of cigarette smoke on salivary antioxidant enzymes may persist after withdrawal from smoking. The objective of this study was to assess salivary superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activity in ex-smokers in comparison with that of subjects who had never smoked. The test group included 25 ex-smokers (13 males and 12 females; mean age: 48 ± 8 years) who had given up smoking for at least one year but for no more than 2 years, and a control group consisting of 25 subjects (14 males and 11 females; mean age: 50 ± 12 years) who had never smoked. Salivary samples were collected and SOD and GSH-Px activity was measured. Student’s t-test was used to evaluate differences between groups and significant differences were observed for p < 0.05. A significant decrease (p < 0.05) of GSH-Px (14.5 ± 2) was observed in the test group compared to the control group (30 ± 4). However, SOD was very similar in the two groups: 0.9 ± 0.3 in the test group and 0.8 ± 0.3 in the controls and no significant difference was detected (p> 0.05). Detoxification of hydrogen peroxide by the GSHPx was altered even after withdrawal from smoking, while the production of hydrogen peroxide, that is mediated by SOD, was not modified.

Estimates of the burden of meningococcal disease in Italy: implications for prevention and control.

Meningococcal disease is an acute, severe bacterial infection caused by Neisseria meningitidis. The most common presentations of invasive meningococcal infection (IMD) are meningitis and sepsis, less common pathologic presentations include focal infections. IMD can develop from initial symptoms to death within 24 hours. As many as 20% of survivors have permanent sequelae. Infants < 1 year of age have the highest incidence and adolescents the highest carriage prevalence. In Italy, the incidence of IMD was 0.25 confirmed cases per 100,000 in 2011, but this may have been considerably underestimated due to under-detection and under-reporting. Recently, we estimated the impact of the MenC universal vaccination on the burden of meningococcal meningitis in Puglia by assessing the completeness of three registration sources (notifications, hospitalizations, and laboratory surveillance). The sensitivity of the three systems was 36.7% (95% CI: 17.5%-57.9%) and registrations lost nearly 28 cases/year in the period 2001- 2013. In the National Surveillance of Invasive Bacterial Diseases, serogroup B accounted for 64.9% of samples serotyped in 2011. Applying this percentage to the total number of hospitalizations for IMD registered in the same year (n = 256), we obtained an estimated 166 episodes attributable to serogroup B. Our work highlights the importance of enhancing surveillance for meningococcal disease and strengthening vaccinations against all preventable serogroups.

Proceedings of the Consensus Day Meeting: Implications for Rotavirus Vaccination in the 2014 Apulian Lifetime Immunization Schedule. Foggia, 17 April 2015.

Recommendations for vaccination against rotavirus (RV) were issued in Apulia in 2006; the vaccine was free of charge to children who entered day care or nursery school by 1 year of age or those affected by chronic diseases for which diarrhea caused by rotavirus can increase the risk of complications and hospitalization. In 2014, vaccination became available to all healthy children with only a copayment. However, there has not been a significant increase in vaccination coverage. On April 17, 2015, Apulian public health physicians and paediatricians met to share strategies to promote the RV vaccine indications provided in the regional immunization schedule. During the meeting, presentation of data reports were interspersed with discussions that were led with a "bottom-up" approach. The discussants responded to pre-planned questions raised by the participants and encouraged by the discussion.

SIMIFF study: Italian fungal registry of mold infections in hematological and non-hematological patients.

PURPOSE: We compared the risk factors, the diagnostic tools and the outcome of filamentous fungal infections (FFIs) in hematological patients (HAEs) and non-hematological patients (non-HAEs). METHODS: Prospective surveillance (2009-2011) of proven and probable FFIs was implemented in 23 Italian hospitals. RESULTS: Out of 232 FFIs, 113 occurred in HAEs and 119 in non-HAEs. The most frequent infection was invasive aspergillosis (76.1 % for HAEs, 56.3 % for non-HAEs), and the localization was principally pulmonary (83.2 % for HAEs, 74.8 % for non-HAEs). Neutropenia was a risk factor for 89.4 % HAEs; the main underlying condition was corticosteroid treatment (52.9 %) for non-HAEs. The distribution of proven and probable FFIs was different in the two groups: proven FFIs occurred more frequently in non-HAEs, whereas probable FFIs were correlated with the HAEs. The sensitivity of the galactomannan assay was higher for HAEs than for non-HAEs (95.3 vs. 48.1 %). The overall mortality rate was 44.2 % among the HAEs and 35.3 % among the non-HAEs. The etiology influenced the patient outcomes: mucormycosis was associated with a high mortality rate (57.1 % for HAEs, 77.8 % for non-HAEs). CONCLUSIONS: The epidemiological and clinical data for FFIs were not identical in the HAEs and non-HAEs. The differences should be considered to improve the management of FFIs according to the patients' setting.

Epidemiological and clinical features of HEV infection: a survey in the district of Foggia (Apulia, Southern Italy).

In this study we assessed the seroprevalence of hepatitis E virus (HEV) infection in both the Italian population and immigrants from developing countries in Foggia (Apulia, Southern Italy). The seroprevalence of HEV was determined in 1217 subjects [412 (34%) immigrants and 805 Italian subjects (blood donors, general population, HIV-positive, haemodialysis patients)]. Serum samples were tested for anti-HEV and confirmed by Western blot assay; in positive patients HEV RNA and genotype were also determined. There were 8·8% of patients that were positive to anti-HEV, confirmed by Western blot. The prevalence in immigrants was 19·7%, and in Italians 3·9% (blood donors 1·3%, general population 2·7%, HIV-positive patients 2·0%, haemodialysis patients 9·6%). Anti-HEV IgM was found in 38/107 (35·5%) of the anti-HEV-positive serum samples (34 immigrants, four Italians). This study indicates a higher circulation of HEV in immigrants and Italian haemodialysis patients, whereas a low prevalence of HEV antibodies was seen in the remaining Italian population.

Outbreak of Salmonella infantis gastroenteritis among people who had eaten at a hash house in southern Italy.

OBJECTIVES: To describe an outbreak of acute gastroenteritis in people who had eaten at a hash house in southern Italy. STUDY DESIGN: Case-control study. METHODS: A clinical case of gastroenteritis was defined as a person who had eaten at the hash house from 29 August to 4 September 2011 and who experienced defined gastrointestinal symptoms within 72 hours, or a person with a laboratory-confirmed salmonella infection without symptoms. A convenience sample was enrolled as the control group. Environmental and human samples were collected, and Salmonella infantis was identified by polymerase chain reaction. Univariate analysis was performed for each food type, and multivariate analysis was performed for each food type and demographic variable (gender, age). RESULTS: Twenty-three cases of gastroenteritis were notified between 1 and 4 September 2011, two of which were admitted to the local hospital. Multivariate analysis showed that porchetta [odds ratio (OR) 22.0, 95% confidence interval (CI) 3.2-152.6, z = 3.13, P = 0.002] and roasted meat (OR 14.4, 95% CI 1.7-122.0, z = 2.45, P = 0.014) were associated with gastrointestinal symptoms. Environmental and human isolates exhibited the same sequence type (ST 32). CONCLUSIONS: This experience highlighted that, in the control of a foodborne outbreak, integrated epidemiological and laboratory surveillance enables rapid identification of the source of infection, thus reducing the risk of an epidemic.

Upper Jaw Development After Lingual Laser Frenectomy and Myofuntional Therapy.

AIM: Over the years, the role of the lingual frenulum in the development of skeletal structures has been evaluated. However, the effect of short lingual frenulum treatment on bone structures is unclear. We need to investigate the effect of surgery and myofunctional therapy on maxillary development. This could be the rationale to establish an orthodontic interception protocol. METHODS: The case-control study was carried out in the Operative Unit of Pedodontics of the University Dental Clinic, at the Department of Medical, Oral and Biotechnological Sciences of the University of "G. D'Annunzio" Chieti-Pescara. The study population consisted in thirty children. The data were collected through anamnesis carried out by qualified health personnel before dental examination. Photos, frenulum length and cast measurements were taken. Student's t-test statistical analysis was used. Significance was ascertained based on the obtained P value of less than 0.01. CONCLUSION: The results confirmed the benefit of laser surgical treatment. The change in parameters related to the anterior palate region showed the power of frenectomy and myofunctional therapy in restoring the tongue's ability to stimulate bone development. The protocol adopted in the following study could be used in interceptive orthodontics. However, further studies are needed to evaluate the effects on the upper jaw over the long term that have higher sample numbers.

Scaffold-assisted cartilage tissue engineering using infant chondrocytes from human hip cartilage.

OBJECTIVE: Studies about cartilage repair in the hip and infant chondrocytes are rare. The aim of our study was to evaluate the use of infant articular hip chondrocytes for tissue engineering of scaffold-assisted cartilage grafts. METHOD: Hip cartilage was obtained from five human donors (age 1-10 years). Expanded chondrocytes were cultured in polyglycolic acid (PGA)-fibrin scaffolds. De- and re-differentiation of chondrocytes were assessed by histological staining and gene expression analysis of typical chondrocytic marker genes. In vivo, cartilage matrix formation was assessed by histology after subcutaneous transplantation of chondrocyte-seeded PGA-fibrin scaffolds in immunocompromised mice. RESULTS: The donor tissue was heterogenous showing differentiated articular cartilage and non-differentiated tissue and considerable expression of type I and II collagens. Gene expression analysis showed repression of typical chondrocyte and/or mesenchymal marker genes during cell expansion, while markers were re-induced when expanded cells were cultured in PGA-fibrin scaffolds. Cartilage formation after subcutaneous transplantation of chondrocyte loaded PGA-fibrin scaffolds in nude mice was variable, with grafts showing resorption and host cell infiltration or formation of hyaline cartilage rich in type II collagen. Addition of human platelet rich plasma (PRP) to cartilage grafts resulted robustly in formation of hyaline-like cartilage that showed type II collagen and regions with type X collagen. CONCLUSION: These results suggest that culture of expanded and/or de-differentiated infant hip cartilage cells in PGA-fibrin scaffolds initiates chondrocyte re-differentiation. The heterogenous donor tissue containing immature chondrocytes bears the risk of cartilage repair failure in vivo, which may be possibly overcome by the addition of PRP.