Critique of interpretation of high levels of heteroplasmy in the human mitochondrial DNA hypervariable region I from hair

The phenomenon known as heteroplasmy can be operationally observed in some human mitochondrial DNA (mtDNA) samples. Typically, heteroplasmy manifests itself in an individual presenting two mtDNA species that differ at a single base. Heteroplasmy at two, and even possibly three sites, also may occur, but at very low rates. A recent report (Grzybowski, 2000, see ref. [13]) suggests that much higher levels of mtDNA (point substitution) heteroplasmy can occur in hair. This observation is contrary to the experience of the forensic mtDNA community. There are several explanations for the unusual findings of high levels of heteroplasmy. First, the template quantities of DNA are approximately three orders of magnitude higher than required for mtDNA sequencing, and an excessive number of amplification cycles were used. Thus, the protocol used did not follow routine practices by the forensic community. Second, there are misidentifications and tabular errors that call into question the reliability of the findings. Third, by comparing the natural human mtDNA variation with a reference sample population with that observed in the heteroplasmy in hair study, the data are inconsistent with population genetic expectations. The observation of high levels of heteroplasmy may be due to contamination of the samples and/or possibly the amplification of nuclear pseudogenes. The results observed in the heteroplasmy in hair study do not apply to other methods of mtDNA analysis and cannot be used to question the reliability of the current forensic mtDNA practices.     

Recommendations for consistent treatment of length variants in the human mitochondrial DNA control region

Human mitochondrial DNA (mtDNA) analysis is a valuable forensic tool, useful in cases where the amount of extracted DNA is low or highly degraded. Population databases are used to determine the relative rarity of a particular profile obtained in a forensic case. Rather than full DNA sequence information, sequence profiles are compared to a reference sequence, and the differences from the reference are recorded in forensic databases. A standard method is proposed for characterizing length variants, and examples are described using actual human control region mtDNA profiles. Consistency in alignment and nomenclature avoids inadvertently describing two sequences as different when in fact they are the same.     

Does Ethical Leadership Matter in Government? Effects on Organizational Commitment,Absenteeism, and Willingness to Report Ethical Problems

Recent ethical scandals involving managers in government organizations have highlighted the need for more research on ethical leadership in public sector organizations. To assess the consequences of ethical leadership, 161 managers in a large state government agency and 415 of their direct reports were surveyed, and personnel records were obtained to measure absenteeism. Results indicate that after controlling for the effects of employee characteristics, perceptions of procedural fairness, and supportive leader behavior, ethical leadership reduced absenteeism and had a positive influence on organizational commitment and willingness to report ethical problems. Implications of the findings and suggestions for future research are presented.     

Presidents and Patronage

To what extent do presidents select appointees based upon campaign experience and connections? The answer to this question has important implications for our understanding of presidential management and political leadership. This article presents a theory explaining where presidents place different types of appointees and why, focusing on differences in ideology, competence, and non‐policy patronage benefits among potential appointees. We develop a formal model and test its implications with new data on 1,307 persons appointed in the first six months of the Obama administration. The empirical results broadly support the theory, suggesting that President Obama was more likely to place appointees selected for non‐policy patronage reasons in agencies off his agenda, in agencies that shared his policy views, and where appointees are least able to affect agency performance. We conclude that patronage continues to play an important role in American politics, with important consequences for campaigns, presidential politics, and governance.     

Are Forensic Evaluations “Health Care” and Are They Regulated by HIPAA?

Forensic mental health providers (FMHPs) typically do not release records to the examinee. The Health Insurance Portability and Accountability Act (HIPAA) federal regulations might change this position, given that they have created a basic right of access to health care records. This legislation has led to a disagreement regarding whether HIPAA regulates forensic evaluations. The primary argument (and the majority of scholarly citations) has been that such evaluations do not constitute “health care.” Specifically, in this position, the nature and purpose of forensic evaluations are not considered related to treatment (amelioration of psychopathology) of the patient. In addition, it asserts that HIPAA applies solely to treatment services; thus, forensic evaluations are inapplicable to HIPAA. We describe the evidence for and against this argument, the strengths and limitations of the evidence, and recent court decisions related to it. The weakest part of the “HIPAA does not regulate forensics” argument is that HIPAA has no exclusion criteria based on type of services. It only creates an inclusion criteria for providers; once “covered,” all services provided by that provider are thence forward “covered.” Authoritative evidence for patient access can be found in the HIPAA regulations themselves, the US Department of Health and Human Services’ commentaries, additional statements and disciplinary cases, the research literature, other agency opinion, and legal opinion. It appears that the evidence strongly suggests that, for those forensic mental health practitioners who are covered entities, HIPAA does apply to forensic evaluations. The implication is that FMHPs potentially face various federal, state, and civil sanctions for refusing to permit patient access to records.     

Applying the Responsibility to Protect to the ‘Arab Spring’

The doctrine of the responsibility to protect, since its inception in the ICISS report of 2001, has been the subject of considerable discussion. Arguably its most publicised component is the principle that the international community has the responsibility to protect civilian populations against severe suffering where the relevant national authorities are unable or unwilling to do so. Consequently, the main focus of discourse upon the responsibility to protect has centred on its impact upon the approach of the international community to intervention in respect of situations posing considerable humanitarian crises. The events of the Arab Spring, in which full blown conflict in some states gave rise to serious human suffering, provided a real opportunity for the international community to evaluate the role of the responsibility to protect in decision-making over responding to such instances, and potentially to develop it into a practical and meaningfully implementable concept. However, due to political flaws inherent in the doctrine, and its arguably overstated significance, the doctrine at best played a minimal role in guiding the international response to developments in the Arab World. Nonetheless, responses to the Arab Spring do allow certain conclusions to be drawn in respect of the future relevance of the doctrine.     

An Investigation of PCR Inhibition Using Plexor®‐Based Quantitative PCR and Short Tandem Repeat Amplification

A common problem in forensic DNA typing is PCR inhibition resulting in allele dropout and peak imbalance. In this paper, we have utilized the Plexor^® real‐time PCR quantification kit to evaluate PCR inhibition. This is performed by adding increasing concentrations of various inhibitors and evaluating changes in melt curves and PCR amplification efficiencies. Inhibitors examined included calcium, humic acid, collagen, phenol, tannic acid, hematin, melanin, urea, bile salts, EDTA, and guanidinium thiocyanate. Results were plotted and modeled using mathematical simulations. In general, we found that PCR inhibitors that bind DNA affect melt curves and C_T takeoff points while those that affect the Taq polymerase tend to affect the slope of the amplification curve. Mixed mode effects were also visible. Quantitative PCR results were then compared with subsequent STR amplification using the PowerPlex^® 16 HS System. The overall results demonstrate that real‐time PCR can be an effective method to evaluate PCR inhibition and predict its effects on subsequent STR amplifications.     

Validating Self-Nomination in Gang Research: Assessing Differences in Gang Embeddedness Across Non-, Current,and Former Gang Members

Objective

The study of gang members is closely linked to the self-nomination method. It is timely to revisit the criterion validity of self-nomination, as recent theoretical and empirical advancements in gang disengagement necessitate further differentiating current from former gang members. This study assessed differences in gang embeddedness—a construct that taps individual immersion within deviant social networks—across three groups: current gang members, former gang members, and those individuals who have never joined a gang.

Methods

Data gathered in 2011 from a high-risk sample of 621 individuals in five cities were used to assess the validity of the self-nomination method. Standardized differences in a mixed graded response model of gang embeddedness were evaluated across the three statuses of gang membership.

Results

Self-nomination was strongly related to embeddedness in gangs, even after controlling for demographic, theoretical, and gang-related factors. The strongest predictor of gang embeddedness was self-nomination as a current or a former gang member, although current gang members maintained levels of gang embeddedness about one standard deviation greater than former gang members. Self-nomination was also the primary determinant of gang embeddedness for males, females, whites, blacks, and Hispanics.

Conclusion

The results of this study provide strong evidence in support of the use of self-nomination to differentiate between non-gang and gang members as well as current and former gang members, adding to a body of research demonstrating that self-nomination is a valid measure of gang membership.