Dead Link Removed - This does not prove PTSD is inherited, but only what I outlined, that
traits of anxiety and depression can be passed, not PTSD itself.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3736070/ - Same as above. Risk factors have been well proven for anxiety and depression within genes, passing "risk" only, not actually inheriting. Saying that, even if a gene is passed and inherited, that only equates to specific aspects increasing risk to anxiety and depression, as they do not require an actual traumatic event of a specific magnitude as PTSD requires.
http://news.emory.edu/stories/2013/04/childhood_abuse_ptsd_epigenetics/index.html - Talks about gene activity changing slightly after being exposed to a criterion A trauma, i.e. child abuse. Also talks about using that change to then undo the issue and treat the cause (plasticity).
Dead Link Removed - Same as above, adds that plasticity of our brain and genome (becoming well researched and sequenced) can change one way, and back again.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2891396/ - Same as above, even proves that PTSD isn't inherited by stating,
"While there are currently no findings that suggest epigenetic modifications that are specific to PTSD or PTSD risk, many recent observations are compatible with epigenetic explanations."
PTSD is not inherited by the very proof you gave linking to those articles, especially the last one, authored by one of the leading experts in the world, Rachel Yehuda.
Rachel Yehuda, PhD, Professor of Psychiatry and Neuroscience, is the Director of the Traumatic Stress Studies Division at the Mount Sinai School of Medicine which includes the PTSD clinical research program and the Neurochemistry and Neuroendocrinology laboratory at the James J. Peters Veterans Affairs Medical Center. Dr. Yehuda is a recognized leader in the field of traumatic stress studies. She has authored more than 250 published papers, chapters, and books in the field of traumatic stress and the neurobiology of PTSD. Her current interests include the study of risk and resilience factors, psychological and biological predictors of treatment response in PTSD, genetic and epigenetic studies of PTSD and the intergenerational transmission of trauma and PTSD. She has an active federally-funded clinical and research program that welcomes local and international students and clinicians.
I think that "PTSD isn't inherited" is still factual and not a myth.